Rinnai Water Heater Age, Contacts, Error Codes, Manuals
CLICK ANYWHERE on THIS PAGE to RETURN to RINNAI WATER HEATER AGE DECODE, MANUALS, ERROR CODES at InspectApedia.com
Tankless Water Heater
Installation and Operation Manual
INTERNAL (INDOOR) MODELS:
RU199i (REU-N3237FF-US) RU180i (REU-N2934FF-US) RU160i (REU-N2530FF-US) RU130i (REU-N2024FF-US)
EXTERNAL (OUTDOOR) MODELS:
RU199e (REU-N3237W-US) RU180e (REU-N2934W-US) RU160e (REU-N2530W-US) RU130e (REU-N2024W-US)
Full-length French and Spanish versions available online at rinnai.us
Place Model/Serial #
Label Here
Located in Manual Bag
ANSI Z21.10.3 CSA 4.3
WARNING If the information in these instructions is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
· Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. · WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance. Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you cannot reach your gas supplier, call the fire department. · Installation and service must be performed by a qualified installer, service agency or the gas supplier.
AVERTISSEMENT Assurez-vous de bien suivre les instructions données dans cette notice
pour réduire au minimum le risque d'incendie ou d'explosion ou pour éviter tout dommage matériel, toute blessure ou la mort.
· Ne pas entreposer ni utiliser d'essence ou ni d'autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.
· QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ : Ne pas tenter d'allumer d'appareil. Ne touchez à aucun interrupteur ; ne pas vous servir des téléphones se trouvant dans le bâtiment. Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur. Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
· L'installation et l'entretien doivent être assurés par un installateur ou un service d'entretien qualifié ou par le fournisseur de gaz.
Rinnai Customer Care 1-800-621-9419
rinnai.us
Rinnai Tankless Water Heater Installation and Operation Manual
U334-0771(00)
06000012336368
Contents
Thank You..................................................................................................................................................... 3 1. Safety ..................................................................................................................................................... 4
1.1 Safety Symbols.............................................................................................................................................4 1.2 Safety Precautions .......................................................................................................................................5 2. About the Water Heater.......................................................................................................................... 6 2.1 Items Included ............................................................................................................................................. 6 2.2 Items Needed for Installation (Not Included)..............................................................................................6 2.3 Items Not Required But May Be Useful.......................................................................................................6 2.4 Accessories ..................................................................................................................................................7 2.5 Specifications ...............................................................................................................................................8 2.6 Dimensions ..................................................................................................................................................9 3. Install the Water Heater .........................................................................................................................11 3.1 Installation Guidelines ...............................................................................................................................11 3.2 Choose an Installation Location.................................................................................................................12 3.3 Mount the Internal (Indoor) Water Heater to the Wall ............................................................................15 3.4 Mount the External (Outdoor) Water Heater to the Wall.........................................................................16 3.5 Vent the Water Heater ..............................................................................................................................17 3.6 Connect the Water Supply.........................................................................................................................40 3.7 Install the Isolation Valves .........................................................................................................................41 3.8 Pressure Relieve Valve...............................................................................................................................42 3.9 Condensate................................................................................................................................................44 3.10 Connect the Gas Supply...........................................................................................................................46 3.11 Connect the Power Supply ......................................................................................................................49 3.12 Parameter Settings ..................................................................................................................................50 3.13 Service Indicator (Service Soon, 55) ........................................................................................................51 3.14 Post-Water Heater Installation Checklist ................................................................................................51 4. Operate the Water Heater......................................................................................................................53 4.1 Safety Precautions .....................................................................................................................................53 4.2 Controller...................................................................................................................................................54 4.3 Setting the Temperature ...........................................................................................................................55 4.4 Performance Data......................................................................................................................................56 4.5 Diagnostic Codes........................................................................................................................................57 5. Maintain the Water Heater ....................................................................................................................59 5.1 Maintenance..............................................................................................................................................59 5.2 Cleaning and Inspecting the Air Filter (Indoor Units Only)........................................................................61 5.3 Flushing the Heater Exchanger..................................................................................................................62 5.4 Draining the Water Heater ........................................................................................................................63 6. Appendices ............................................................................................................................................64 6.1 Wiring Diagram..........................................................................................................................................64 6.2 Ladder Diagram .........................................................................................................................................65 6.3 Pressure Drop and Water Flow Curves......................................................................................................66 6.4 Guidelines for Additional Temperature Controllers..................................................................................67 6.5 Massachusetts State Gas Regulations .......................................................................................................68 6.6 Warranty....................................................................................................................................................70
2
Rinnai Tankless Water Heater Installation and Operation Manual
Thank You
Thank you for purchasing a Rinnai Tankless Water Heater. Before installing and operating this water heater, be sure to read these instructions completely and carefully to familiarize yourself with the water heater's features and functionality.
If You Need Service
Contact your local dealer/distributor or call Rinnai Customer Care at 1-800-621-9419 Monday to Friday between 8 AM to 8 PM ET. Please have your full serial number or model number available for product- or service-related issues.
To The Installer
· A trained and qualified professional must install the water heater, inspect it, and leak test it before use. The warranty will be voided due to any improper installation.
· The trained and qualified professional should have skills such as:
Gas sizing
Connecting gas lines, water lines, valves, and electricity
Knowledge of applicable national, state, and local codes
Installing venting through a wall or roof
Training in installation of tankless water heaters. Training on Rinnai Tankless Water Heaters is accessible at www.trainingevents.rinnai.us
· Read all instructions in this manual before installing the water heater. The water heater must be installed according to the exact instructions in this manual.
· Proper installation is the responsibility of the installer.
· When installation is complete, leave this manual with the water heater (for internal/ indoor units) or give the manual directly to the consumer.
To The Consumer
· You must read the entire manual to properly operate the water heater and to have regular maintenance performed.
· Keep this manual for future reference.
· As when using any appliance generating heat, there are certain safety precautions you should follow. See section "1.2 Safety Precautions" for detailed safety precautions.
· Be sure your water heater is installed by a licensed installer.
· If installing in the state of Massachusetts, you must read section "6.5 Massachusetts State Gas Regulations" in this manual.
Rinnai Tankless Water Heater Installation and Operation Manual
3
1. Safety
WARNING
· If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.
· Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
· WHAT TO DO IF YOU SMELL GAS: Do not try to light any appliance. Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you cannot reach your gas supplier, call the fire department.
· Installation and service must be performed by a qualified installer, service agency or the gas supplier. · The warning signs in this manual are here to prevent injury to you and others. Please follow them explicitly.
AVERTISSEMENT
· Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au minimum le risque d'incendie ou d'explosion ou pour éviter tout dommage matériel, toute blessure ou la mort.
· Ne pas entreposer ni utiliser d'essence ou ni d'autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.
· QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ : Ne pas tenter d'allumer d'appareil. Ne touchez à aucun interrupteur ; ne pas vous servir des téléphones se trouvant dans le bâtiment. Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur. Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
· L'installation et l'entretien doivent être assurés par un installateur ou un service d'entretien qualifié ou par le fournisseur de gaz.
· Les panneaux d'avertissement de ce manuel sont ici pour éviter de vous blesser et d'autres personnes. Suivezles explicitement.
1.1 Safety Symbols
Safety alert symbol. Alerts you to potential hazards that can kill or hurt you and others.
DANGER
Indicates an imminently hazardous situation which, if not avoided, will result in personal injury or death.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It may also be used to alert against unsafe practices.
4
Rinnai Tankless Water Heater Installation and Operation Manual
1.2 Safety Precautions
The following precautions apply to the installer and consumer. Read and follow all instructions in this section.
WARNING
DO NOT adjust the internal gas valve. The design is such that adjustment is not required. Warranty will be voided if the internal gas valve is adjusted.
· Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
· Keep the area around the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
· Combustible construction refers to adjacent walls and ceiling and should not be confused with combustible or flammable products and materials. Combustible and/or flammable products and materials should never be stored in the vicinity of this or any gas appliance.
· Always check the water temperature before entering a shower or bath.
· To protect yourself from harm, before performing maintenance: Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker. (The temperature controller does not control the electrical power.) Turn off the gas at the manual gas control valve, usually located immediately below the water heater. Turn off the incoming water supply. This can be done at the isolation valve immediately below the water heater or by turning off the water supply to the building. Use only your hand to turn the manual gas control valve. Never use tools. If the manual gas control valve will not turn by hand, do not try to repair it; call a trained and qualified professional. Force or attempted repair may result in a fire or explosion.
· Do not use this appliance if any part has been under water. Immediately call a licensed professional to inspect the appliance and to replace any part of the control system and any manual gas control valve which has been under water. (N'utilisez pas cet appareil s'il a été plunge dans l'eau, même partiellement. Faites inspecter l'appareil par un licence professionnelle et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l'eau.)
· Do not use substitute materials. Use only parts certified for the appliance.
· Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. (En cas de surchauffe ou si l'alimentation en gaz ne s'arrête pas, fermez manuellement le robinet d'arrêt de l'admission de gaz.)
· Only trained and qualified professionals are permitted to adjust parameter settings.
· Do not use an extension cord or adapter plug with this appliance.
· Any alteration to the appliance or its controls can be dangerous and will void the warranty.
· Proper venting is required for the safe operation of this appliance.
· Flammable liquids such as cleaning solvents, aerosols, paint thinners, adhesives, gasoline and propane must be handled and stored with extreme care. These flammable liquids emit flammable vapors and when exposed to an ignition source can result in a fire hazard or explosion. Flammable liquids should not be used or stored in the vicinity of this or any other gas appliance.
· DO NOT operate the water heater without the front panel installed. The front panel should only be removed for service/maintenance or replacing internal components.
· BURN HAZARD. Hot exhaust and vent may cause serious burns. Keep away from the water heater. Keep small children and animals away from the water heater.
· Hot water outlet pipes leaving the water heater can be hot to touch.
· Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. (Ne pas entreposer ni utiliser d'essence ou ni d'autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.)
· Install the vent system per local and national codes. · Do not install this water heater above 10,200 ft
(3,109 m). · Do not obstruct combustion air to the water heater. · Failure to properly vent this appliance can result in
death, personal injury and/or property damage. · Rinnai recommends that every home have a carbon
monoxide (CO) alarm in the hallway near bedrooms in each sleeping area. Check batteries monthly and replace them annually. · California law requires the following Proposition 65 warning to be provided:
WARNING
This product can expose you to chemicals including lead, lead compounds and carbon bisulfide which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more
information, visit www.P65Warnings.ca.gov.
Rinnai Tankless Water Heater Installation and Operation Manual
5
2. About the Water Heater
2.1 Items Included
Unpack the Rinnai Tankless Water Heater package and verify the following contents are included. If any items are missing, contact your local dealer/distributor or call Rinnai Customer Care at 1-800-621-9419.
· Rinnai Tankless Water Heater · Wall Mounting Bracket (for internal/indoor water heaters only) · Pressure Relief Valve and Adapter · Isolation Valve Kit (for quick isolation of the water heater for service and/or maintenance) · Literature Bag
Tankless Water Heater Installation and Operation Manual (this manual) Wall Mounting Bracket Template (for internal/indoor water heaters only) Model/Serial Number Labels (with printed QR code) Controller Cable (for additional controller connection) · Vent screens (x2) and vent screen screws (x2) (for internal/indoor water heaters only). The vent screen prevents debris and other objects from entering the terminal. One vent screen is for the intake; the other is for the exhaust · Self-Tapping Screws (x2) (for internal/indoor water heaters only)
2.2 Items Needed for Installation (Not Included)
· Pipe wrenches (x2) · Phillips Head screwdriver · Wire cutters · Gloves · Safety glasses
· Level · Soap or gas leak detector solution · Approved venting · Teflon tape (recommended) or pipe compound · Pipe insulation
2.3 Items Not Required But May Be Useful
· Hammer drill with concrete bits · Saw · Threading machine with heads and oiler · Core drill with diamond head · Torch set · Copper tubing cutter · Steel pipe cutter · Heat tape
· Electrical wire · Concrete wall anchors · Optional pipe cover · PVC glue/cement and primer · 2 conductor 22 AWG wire for controller · Single gang electrical box · Wire nuts · Unions and drain valves
6
Rinnai Tankless Water Heater Installation and Operation Manual
2.4 Accessories
Numerous optional accessories are available for purchase for your Rinnai Tankless Water Heater. Listed below are some commonly purchased accessories. For a complete list of accessories, visit www.rinnai.us.
For questions, or to purchase an accessory, contact your local Rinnai dealer/distributor or Rinnai Customer Care at 1-800-621-9419.
Product Room Air Screen
Product Description
Recommended air filter/screen for use in room air applications only.
Image
Condensate Neutralizer ScaleCutter
Neutralizes the condensate generated by the water heater.
Filters and reduces the amount of scale entering the water heater allowing for greater water heater longevity.
ScaleCutter Refill Cartridge
Drain Down Kit
Refill cartridge for the ScaleCutter filter assembly.
Provides freeze protection by immediately draining the water heater upon loss of power.
Additional Controller
Additional controllers are available for user convenience.
Recess Box
Allows an external (outdoor) water heater to be recessed into a wall.
Pipe Cover
Encloses the piping below the water heater for aesthetic purposes.
Control-RTM Wi-Fi Module (And Accessories)
Recirculation Pump
External Pump Cable EZ Connect Cable
Controls On-Demand recirculation, remotely adjust temperatures, and communicates with the service provider portal. The Control-RTM Wi-Fi Module and MC-195T-US controller are not compatible accessories and must not be installed together.
A pump system can be incorporated with Rinnai Circ-LogicTM recirculation technology in a dedicated recirculation system.
Provides electrical connections for external recirculation pump control.
Electronically connects two water heaters and allows them to function as one hot water source.
DPS/MIS Switch
· The DPS function provides domestic hot water priority for combination tankless water heater/ air handler applications.
· The MIS function provides tankless water heater monitoring via systems such as BMS (Building
Management System).
Rinnai Tankless Water Heater Installation and Operation Manual
7
2.5 Specifications
Internal (Indoor) Units
External (Outdoor) Units
RU199i RU180i RU160i RU130i RU199e RU180e RU160e RU130e
Minimum Gas Consumption Btu/h
Maximum Gas Consumption Btu/h
Flow Rate1 (Min - Max)
15,000
199,000
180,000
160,000
130,000
199,000
180,000
160,000
130,000
0.26 - 9.8 GPM 0.26 - 9.0 GPM 0.26 - 8.0 GPM 0.26 - 6.6 GPM 0.26 - 9.8 GPM 0.26 - 9.0 GPM 0.26 - 8.0 GPM 0.26 - 6.6 GPM (1.0 - 37 L/min) (1.0 - 34 L/min) (1.0 - 30 L/min) (1.0 - 24 L/min) (1.0 - 37 L/min) (1.0 - 34 L/min) (1.0 - 30 L/min) (1.0 - 24 L/min)
Max Flow Rate with Parameter Adjustment
Weight
11 GPM (42 L/min)
64 lb (29 kg)
10 GPM (38 L/min)
64 lb (29 kg)
9 GPM (34 L/min)
62 lb (28 kg)
7 GPM (26 L/min)
62 lb (28 kg)
11 GPM (42 L/min)
64 lb (29 kg)
10 GPM (38 L/min)
64 lb (29 kg)
9 GPM (34 L/min)
62 lb (28 kg)
7 GPM (26 L/min)
62 lb (28 kg)
Sound Level
48 dB
47 dB
47 dB
47 dB
53 dB
52 dB
52 dB
52 dB
Normal
84 W
65 W
52 W
38 W
81 W
62 W
49 W
36 W
Standby
Electrical Data
Freeze Protection
Max Current
148 W
Fuse
Temperature Setting
· Minimum: 98° F (37° C) · Maximum: Default: 120° F (49° C)
1.3 W
4 Amps 10 Amps With Parameter Adjustment: 140° F (60° C)
152 W
By-Pass Flow Control Electronic
Gas Supply Natural 3.5 in. w.c. - 10.5 in. w.c. Pressure2 Propane 8.0 in. w.c. - 13.5 in. w.c.
Type of Appliance
Super-High-Efficiency (Condensing), Tankless, Temperature Controlled Continuous Flow Gas Hot Water System
Ignition System
Direct Electronic Ignition
Electric Connections Water Supply Pressure Remote Control Cable
· Appliance: AC 120 Volts, 60Hz. · Temperature Controller: DC 12 Volts (Digital)
· Minimum: 50 PSI (Recommended 60-80 PSI for maximum performance) · Maximum: 150 PSI
Non-Polarized Two Core Cable (Minimum 22 AWG)
Energy Star Qualified Yes
Complies with South Coast Air Quality Management District Yes 14 ng/J or 20 ppm NOx emission levels
1 Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. Minimum activation flow is 0.4 GPM (1.5 L/min). 2 The maximum gas supply pressure must not exceed the value specified by the manufacturer. Rinnai products are continually being updated and improved; therefore, specifications are subject to change without prior notice.
8
Rinnai Tankless Water Heater Installation and Operation Manual
2.6 Dimensions
Measurements: in. (mm)
Internal (Indoor) Models (RU199i, RU180i, RU160i, and RU130i)
Vent Connection:
2 in. (51 mm) nominal PVC/Polypropylene or 3 in./5 in. Concentric.
Front Panel View
Side Panel View
External (Outdoor) Models (RU199e, RU180e, RU160e, and RU130e)
Front Panel View
Side Panel View
Rinnai Tankless Water Heater Installation and Operation Manual
9
Connections (for Internal and External Water Heaters)
Measurements: in. (mm)
Bottom View of Water Heater
Pressure Relief Valve (PRV)
M33 THREAD
10
Rinnai Tankless Water Heater Installation and Operation Manual
3. Install the Water Heater
THIS SECTION IS INTENDED FOR THE INSTALLER Installer qualifications: A trained and qualified professional must install the appliance, inspect it, and leak test the water heater before use. The warranty will be voided due to any improper installation. The trained and qualified professional should have skills such as: Gas sizing; Connecting gas lines, water lines, valves, and electricity; Knowledge of applicable national, state, and local codes; Installing venting through a wall or roof; and training in installation of tankless water heaters. Training for Rinnai Tankless Water Heaters is accessible online at www.trainingevents.rinnai.us.
3.1 Installation Guidelines
When installing the water heater, follow these guidelines:
· This water heater is certified for installation in residential applications and manufactured (mobile) homes.
· This water heater is suitable for combination water heating and space heating and not suitable for space
heating applications only. · The installation must conform with local codes or, in
the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1. If installed in a manufactured home, the installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 and/or CAN/SCA Z240 MH Series, Mobile
Homes. · The appliance, when installed, must be electrically
grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70, or the Canadian Electrical Code, CSA C22.1. · The appliance and its main gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test
pressures in excess of 1/2 psi (3.5 kPa) (13.84 in W.C.). For system testing at pressures less than or equal to 1/2 psi (3.5 kPa) (13.84 in W.C.) the appliance must be isolated from the gas supply piping by closing its individual manual shutoff valve. · You must follow the installation instructions and those in section "3.5 Vent the Water Heater" for adequate combustion air and exhaust.
· If a water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or local plumbing inspector on how to control thermal expansion.
· Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.
(En cas de surchauffe ou si l'alimentation en gaz ne s'arrête pas, fermez manuellement le robinet d'arrêt de l'admission de gaz.) · Combustion air must be free of chemicals, such as chlorine or bleach, that produce fumes. These fumes can damage components and reduce the life of your appliance.
DO NOT
DO NOT install the following internal (indoor) water heaters outdoor: RU199i, RU180i, RU160i, or RU130i.
DO NOT install the following external (outdoor) water heaters indoor: RU199e, RU180e, RU160e, or RU130e.
DO NOT install the water heater in an area where water leakage of the unit or connections will result in damage to the area adjacent to the appliance or to lower floors of the structure. When such locations cannot be avoided, it is required that a suitable drain pan, adequately drained, be installed under the water heater. The pan must not restrict combustion air flow.
DO NOT install the water heater in an area with negative air pressure.
DO NOT obstruct the flow of combustion and ventilation air.
DO NOT use this appliance in an application such as a pool or spa heater that uses chemically treated water. This appliance is suitable for filling large or whirlpool spa tubs with potable water.
DO NOT use substitute parts that are not authorized for this appliance.
Rinnai Tankless Water Heater Installation and Operation Manual
11
3.2 Choose an Installation Location
When selecting an installation location, you must ensure that clearances will be met and that the vent length will be within required limits. Consider the installation environment, water quality, and need for freeze protection. Requirements for the gas line, water lines, electrical connection, and condensate disposal can be found in their respective installation sections in this manual.
Water Quality Guidelines
This section provides information on the importance of water quality to the Rinnai Tankless Water Heater. The information is intended to serve as general guidelines only and is not a complete list of water quality guidelines.
Consideration of care for your water heater should include evaluation of water quality. The water must be potable, free of corrosive chemicals, sand, dirt, or other contaminants. It is up to the installer to ensure the water does not contain corrosive chemicals or elements that can affect or damage the Rinnai Tankless Water Heater. Water that contains chemicals exceeding the levels below can damage the Rinnai Tankless Water Heater. Replacement of components due to water quality damage is not covered by the warranty.
Contaminant Total Hardness
Maximum Level Up to 200 mg/L
Aluminum *
Up to 0.2 mg/L
Chlorides *
Up to 250 mg/LL
Copper *
Up to 1.0 mg/L
Dissolved Carbon Dioxide (CO2) Up to 15.0 mg/L
Iron *
Up to 0.3 mg/L
Manganese *
Up to 0.05 mg/L
pH *
6.5 to 8.5
TDS (Total Dissolved Solids) *
Up to 500 mg/L
Zinc *
Up to mg/L
* Source: Part 143 National Secondary Drinking Water Regulations
If you install this water heater in an area that is known to have hard water or that causes scale build-up, the water must be treated and may require a more frequent flushing schedule.
This water heater includes a service indicator (Service Soon, SS). When selected in the parameter settings, an SS code will display on the controller indicating that it is time to flush and service the water heater. Scale build-up is caused by hard water and can be accelerated if the water heater is set at a high temperature.
Rinnai offers Southeastern Filtration's "ScaleCutter Water Conditioning System" that offers superior lime scale prevention and corrosion control by feeding a blend of control compounds into the cold water supply.
Environment
Air surrounding the water heater, venting, and vent termination(s) is used for combustion and must be free of any compounds that cause corrosion of internal components. These include corrosive compounds that are found in aerosol sprays, detergents, bleaches, cleaning solvents, oil based paints/varnishes, and refrigerants. The air in beauty shops, dry cleaning stores, photo processing labs, and storage areas for pool supplies often contains these compounds. Therefore, it is recommended that external (outdoor) models be used for these locations where possible. In applications utilizing room air where there are high levels of particulates, Rinnai offers a room air screen. The water heater, venting, and vent termination(s) should not be installed in any areas where the air may contain these corrosive compounds.
12
Rinnai Tankless Water Heater Installation and Operation Manual
Internal (Indoor) Water Heaters
· Install the water heater as far away as possible from any air inlet vents. Corrosive fumes, sometimes found in hair/ nail salons, spas, or other industries exposed to toxic fumes, may be released through these vents when not in operation. Chemicals that are corrosive in nature should not be stored or used near the water heater or vent termination. This requirement applies to internal (indoor) and external (outdoor) water heaters.
· In coastal regions, the water heater should be installed so that it is sheltered/protected from exposure to sea breeze. Exposure to salty spray or breeze can cause corrosion of the water heater.
DO NOT install the water heater in areas where combustion air might be contaminated with chemicals.
DO NOT use room air in applications where the indoor air is corrosive. Install the water heater as direct vent in a sealed closet so that it is protected from the potential of contaminated indoor air.
External Water Heaters and Vent Terminations
· Install the water heater as far away as possible from exhaust vent hoods and dryer vents. · In coastal regions, the water heater should be installed so that it is sheltered/protected from exposure to sea
breeze. Exposure to salty spray or breeze can cause corrosion of the water heater. · Damage and repair due to corrosive compounds in the air is not covered by warranty. · Install the water heater as far away as possible from any air inlet vents. Corrosive fumes, sometimes found in hair/
nail salons, spas, or other industries exposed to toxic fumes, may be released through these vents when not in operation. Chemicals that are corrosive in nature should not be stored or used near the water heater or vent termination. This requirement applies to internal (indoor) and external (outdoor) water heaters.
Freeze Protection
Make sure that in case of freezing weather the water heater and its water lines are protected to
prevent freezing. Damage due to freezing is not covered by the warranty.
When connected to a 120-volt power supply, the
water heater will not freeze when the outside air temperature is as cold as 22°F (-30°C) for internal (indoor) models or 4°F (-20°C) for
external (outdoor) models, when protected from direct wind exposure. Because of the "wind-chill" effect, any wind or circulation of the air on the
water heater will reduce its ability to protect itself from freezing.
In the event of a power failure and/or gas interruption at temperatures below freezing, the
water heater should manually be drained of all
water to prevent freezing damage. In addition, drain the condensate trap, drain line and
pressure relief valve.
Loss of freeze protection may result in water
damage from a burst heat exchanger or water lines.
The water heater may be drained manually.
However, it is highly recommended to install the optional Drain Down Kit accessory that will enable the water heater to immediately drain
upon loss of power (the condensate trap and pressure relief valve are not affected by the Drain Down Kit and must be manually drained).
The freeze protection features will not prevent the external piping and valves from freezing. It is recommended that hot and cold water pipes be insulated. Pipe cover enclosures may be packed with insulation for added freeze protection.
Hot Water Supply Line
Freeze Protection Piping Diagram
Vacuum Breaker *
Legend Vacuum Breaker Pressure Relief Valve Union Check Valve Ball Valve Solenoid Valve Drain Valve
* Position vacuum breaker above water heater. Gas Supply
3/4 in. Normally Closed Solenoid Valve
Cold Water Supply Line 1/2 in. Normally Open Solenoid Valve Route Drain Per Local Code
Rinnai Tankless Water Heater Installation and Operation Manual
13
CLEARANCES
Top
2 in. (51 mm)
0 in from vent components
Bottom/Ground
12 in. (305 mm)
Front
0 in.
Clearance for servicing is 24 in. (610 mm) in front of water heater
Back
0 in.
Sides (Left and Right)
2 in. (51 mm)
Add 0.25 in. (6.35 mm) for recess box
Vent
0 in.
(Internal/Indoor Models)
Front Exhaust
24 in. (610 mm)
(External/Outdoor Models)
INTERNAL (INDOOR) MODELS
Top
Front
Side
Bottom
EXTERNAL (OUTDOOR) MODELS
Top
Front
Side
Bottom
INSTALLATION LOCATION CHECKLIST
Use this checklist to ensure you have selected the correct location for the water heater.
The water heater is not exposed to corrosive compounds in the air. The water heater location complies with the required clearances. The planned combustion air and exhaust termination locations meet the required clearances. The water supply does not contain chemicals or exceed total hardness that will damage the heat exchanger. A standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet (for internal/indoor models) or other 120 VAC,
60 Hz source is available.
The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1.
14
Rinnai Tankless Water Heater Installation and Operation Manual
3.3 Mount the Internal (Indoor) Water Heater to the Wall
You Will Need:
· Rinnai Tankless Water Heater (Internal/Indoor Model)
· Wall Mounting Bracket
Supplied by Installer: · Level · 4 screws for mounting bracket installation · Screws for top and bottom bracket installation Use appropriate screws for type of wall construction.
1
2
Hold the wall mounting bracket up against the wall and use a level to make sure the bracket is even. Proper operation requires the water heater to be level.
Level
Use 4 screws to secure the wall mounting bracket to the wall (2 screws on far left side and 2 screws on far right side).
Use the appropriate screws for the wall construction to secure the mounting bracket to the wall between two studs.
Wall Mounting Bracket
3 Insert the water heater top bracket into the wall mounting bracket.
Make sure the wall mounting bracket is sturdy and can hold the weight of the water heater before you fully let go.
Water Heater Right Side
4 Securely screw the top and bottom brackets into the
wall, making sure the screws are flush with the wall.
· Use any of the holes in the top and bottom brackets.
· Make sure the securing method is sufficient to support the weight of the water heater. Refer to the water heater weight in section "2.5 Specifications."
IMPORTANT: The water heater must be installed in an upright position. Do not install the water heater upside down or on its side.
Top Bracket
Bottom Bracket
Rinnai Tankless Water Heater Installation and Operation Manual
15
3.4 Mount the External (Outdoor) Water Heater to the Wall
You Will Need:
· Rinnai Tankless Water Heater (External/Outdoor Model)
Supplied by Installer: · Level · Screws for top and bottom bracket installation Use appropriate screws for type of wall construction.
Instructions: Securely screw the top and bottom brackets into the wall, making sure the screws are flush with the wall.
· Use any of the holes in the top and bottom brackets.
· Use a level (placed horizontally or vertically) to make sure the water heater is straight. Proper operation requires the water heater to be level.
· Make sure the securing method is sufficient to support the weight of the water heater. Refer to the water heater weight in section "2.5 Specifications."
IMPORTANT: The water heater must be installed in an upright position. Do not install the water heater upside down or on its side.
Top Bracket
Bottom Bracket
Level
16
Rinnai Tankless Water Heater Installation and Operation Manual
3.5 Vent the Water Heater
Guidelines
· Internal water heaters can be installed as direct vent or non-direct vent applications. · When installed as Direct Vent, refer to the "Direct Vent Approved Vent Manufacturers and Products" section
(within the "1. Direct Vent" section) for a complete list of approved vent manufacturers and products. · When installed as Non-Direct Vent (Room Air), the vent must be Category IV and of a type listed by a national
recognized testing agency. · Exhaust must be directly vented to the outside. Combustion air can be provided from outside (Direct Vent) or
from room air (Non-Direct Vent). · If using room air (non-direct vent) for combustion, ensure the required volume of indoor air is available
according to the National Fuel Gas Code, ANSI Z223.1/NFPA 54. · Avoid dips or sags in horizontal vent runs by installing supports per the vent manufacturer's instructions. · Support horizontal vent runs every 4 ft (1.2 m) and all vertical vent runs every 6 ft (1.83 m) or as per vent
manufacturer's instructions or local code requirements. · Venting should be as direct as possible with a minimum number of pipe fittings. · For manufactured vent systems, vent connections must be firmly pressed together so that the connections form
an air tight seal. Follow the venting manufacturer's instructions. · Refer to the PVC/CPVC manufacturer for appropriate fittings, solvents or joining methods. · The vent piece connected to the water heater must be secured with 1 self-tapping screw. · Refer to the instructions of the vent system manufacturer for component assembly instructions. · If the vent system is to be enclosed, it is suggested that the design of the enclosure shall permit inspection of the
vent system. The design of such enclosure shall be deemed acceptable by the installer or the local inspector. · Any issues resulting from improper vent installation will not be covered by warranty.
WARNING
DO NOT use cellular core PVC/CPVC.
DO NOT use Radel, ABS, or galvanized material to vent this appliance.
DO NOT cover non-metallic vent pipe and fittings with thermal insulation.
DO NOT combine vent components from different manufacturers.
DO NOT reduce the vent diameter. Vent diameter cannot be less than 2 in. (51 mm).
DO NOT connect the venting system with an existing vent or chimney.
DO NOT common vent with the vent pipe of any other manufacturer's water heater or appliance. Rinnai water heaters can only be common vented with Schedule 40 PVC/CPVC or with a Rinnai certified common vent system.
Rinnai Tankless Water Heater Installation and Operation Manual
17
Venting Installation Sequence
1. Install the water heater. 2. Determine the termination method--horizontal or vertical, concentric, or twin pipes, etc. 3. Determine proper location for wall or roof penetration for each termination. 4. Install termination assembly as described in this manual or in the vent manufacturer's installation instructions. 5. Install air and vent piping from water heater to termination. 6. Slope horizontal exhaust run towards the water heater 1/4 in. per foot. DO NOT slope combustion air pipe
towards water heater. 7. Install vent supports and brackets allowing for movement from expansion, or as per vent manufacturer's
instructions or local code requirements. 8. Install vent screen (supplied with water heater) on PVC combustion air and exhaust termination elbows as
illustrated below. · Press vent screen inside of termination piece/elbow. · Secure vent screen to the elbow with screw provided.
Termination Considerations
Check to determine whether local codes supersede the following clearances:
· Avoid termination locations near a dryer vent. · Avoid termination locations near commercial
cooking exhaust. · Avoid termination locations near any air inlets. · You must install a vent termination at least 12 in
above the ground or anticipated snow level.
The vent for this appliance shall not terminate: · Over public walkways. · Near soffit vents or crawl space vents or other area where condensate or vapor could create a nuisance or hazard or cause property damage. · Where condensate or vapor could cause damage or could be detrimental to the operation of regulators pressure relief valves, or other equipment.
Listed below are important considerations for locating vent termination under a soffit (ventilated or unventilated or eave vent; or to a deck or porch):
· Do not install vent termination under a soffit vent such that exhaust can enter the soffit vent.
· Install vent termination such that exhaust and rising moisture will not collect under eaves. Discoloration to the exterior of the building could occur if installed too close.
· Do not install the vent termination too close under the soffit where it could present recirculation of exhaust gases back into the combustion air part of the termination.
18
Rinnai Tankless Water Heater Installation and Operation Manual
Select a Vent Type
Three types of venting options are available:
1 Direct Vent (Concentric Pipe and Twin Pipe)
Concentric Pipe
Combustion air and exhaust vent directly through a single concentric connection. Hot exhaust exits through the interior tube, while combustion air enters through the outer layer.
Exhaust
Combustion air
Combustion air
Twin Pipe
Combustion air and exhaust vent directly through separate penetrations.
Combustion air
Exhaust
2 Non-Direct Vent (Room Air and External)
Room Air
Room air is used for combustion while exhaust vents to the outside.
Exhaust Combustion
air
External (Outdoor)
External (outdoor) water heater.
Exhaust
Combustion air
3 Common Vent (Indoor Units Only. Direct Vent and Non-Direct/Room Air Vent)
Direct Vent
Multiple water heaters sharing a combustion air header and a separate exhaust header that vents directly through separate penetrations to the outside.
Exhaust
Non-Direct (Room Air) Vent
Multiple water heaters using room air for combustion while sharing an exhaust header that vents directly to the outside.
Exhaust
Combustion Air
Room Air For Combustion
Rinnai Tankless Water Heater Installation and Operation Manual
19
1 Direct Vent (Concentric Pipe and Twin Pipe)
Direct Vent Approved Vent Manufacturers and Products
Following is a list of vent components and terminations for Direct Vent installations. Install the correct venting for your model according to the venting manufacturer's instructions and the guidelines below. The information below is correct at time of publication and is subject to change without notice. Contact the vent manufacturer for questions related to the vent system, products, part numbers and instructions.
Manufacturer
Phone
Web Site
Ubbink
800-621-9419
www.rinnai.us
Centrotherm 877-434-3432
www.centrotherm.us.com
Heat-Fab
800-772-0739
www.heatfab.com
Metal Fab 800-835-2830
www.metal-fabinc.com
IPEX
U.S.: 800-463-9572 www.ipexamerica.com
Canada: 866-473-9462 www.ipexinc.com
DuraVent
800-835-4429
www.duravent.com
Royal
800-232-5690
www.royalbuildingproducts.com
Diagram Horizontal Vertical Equivalent Length
(ft)
Produc t Description
Manufacturer Part Number
Manufacturer
UBBIN K
2 in./4 in. CONCENTRIC VENT TERMINATIONS
229011NPP
2/4 Condensing Horizontal Termination Kit 8.7 in.
229012NPP
2/4 Condensing Horizontal Termination Kit 12 in.
5
229013NPP
2/4 Condensing Horizontal Termination Kit 21 in.
224356NPP
2/4 Condensing Roof Discharge Termination 20 in. above roof
5
710202NPP
2/4 Condensing 90 Degree Diverter Nose
(Use with Wall Terminal)
5
710215NPP
2/4 Condensing 45 Degree Diverter Nose
(Use with Wall Terminal)
5
196005, 197040 FGV Concentric Vent Kit
(16 in. length)
20
196105, 197033 FGV Concentric Vent Kit
(28 in. length)
20
196125
FGV Concentric Vent Kit (40 in. length)
20
20
Rinnai Tankless Water Heater Installation and Operation Manual
IPEX
Diagram Horizontal Vertical Equivalent Length
(ft)
Manufacturer Manufacturer Part Number
ROYA L
1 Direct Vent (Concentric Pipe and Twin Pipe)
Produc t Description
CENTROTHERM
2 in./4 in. CONCENTRIC VENT TERMINATIONS (Continued)
52CVKGVS6502
PVC Concentric Vent Kit 2 in. x 16 in.
20
52CVKGVS6502-28 PVC Concentric Vent Kit 2 in. x 28 in. 20
52CVKGVS6502-40 PVC Concentric Vent Kit 2 in. x 40 in. 20
ICRT2439
2 in. x 4 in. Concentric Roof Termination
20
2PPS-VKL/VK-TCL
2 in. x 4 in. Vertical Termination Cap Kit-Concentric
20
2PPS-HKL
2 in. x 4 in. Horizontal Termination
Kit-Concentric
20
DURAVENT
Rinnai Tankless Water Heater Installation and Operation Manual
21
1 Direct Vent (Concentric Pipe and Twin Pipe)
Diagram Horizontal
Vertical Equivalent Length
(ft)
Produc t Description
Manufacturer Manufacturer Part Number
UBBINK
IPEX
3 in./5 in. CONCENTRIC VENT TERMINATIONS
223174PP
3/5 Condensing Horizontal Termination Kit 8.7 in.
223176PP
3/5 Condensing Horizontal Termination Kit 12 in.
5
223177PP
3/5 Condensing Horizontal Termination Kit 21 in.
223186PP
3/5 Condensing Horizontal Diverter
Termination Kit 19 in.
16
224047PP
3/5 Condensing Raised Horizontal
Termination Kit
24
184162PP
3/5 Condensing Roof Discharge
Termination 20 in. above roof
5
196006, 197009
FGV Concentric Vent Kit 3 in. x 20 in.
20
196106, 197107
FGV Concentric Vent Kit 3 in. x 32 in.
20
196116, 197117
FGV Concentric Vent Kit 3 in. x 44 in.
20
52CVKGVS6503 (PVC)/
PVC/CPVC Concentric Vent Kit 3 in. x 20 in.
52CVKGVSF9003 (CPVC)
20
52CVKGVS6503-32 (PVC)/ PVC/CPVC Concentric Vent Kit 3 in. x 32 in.
52CVKGVSF9003-32 (CPVC)
20
52CVKGVS6503-44 (PVC)/ PVC/CPVC Concentric Vent Kit 3 in. x 44 in.
52CVKGVSF9003-44 (CPVC)
20
SC03HT
Horizontal Termination Adapter
20
SC03VT
Vertical Termination Adapter
20
ICRT3539
3''/5'' Concentric Roof Termination PPs-UV
20
ROYA L
HEAT-FAB
22
Rinnai Tankless Water Heater Installation and Operation Manual
CENTROTHERM
Diagram Horizontal
Vertical Equivalent Length
(ft)
1 Direct Vent (Concentric Pipe and Twin Pipe)
Produc t Description
Manufacturer Manufacturer Part Number
METAL-FAB
3 in./5 in. CONCENTRIC VENT TERMINATIONS (Continued)
3CGRLSV
Vertical Adapter
1
3CGRLSH
Horizontal Adapter
6
3CGRVT
Vertical Termination
5
3CGRHT
Horizontal Termination
16
3PPS-VKL/VK-TCL
3 in. x 5 in. Vertical Termination Cap Kit-Concentric
20
3PPS-HKL
3 in. x 5 in. Horizontal Termina-
tion Kit-Concentric
20
DURAVENT
Rinnai Tankless Water Heater Installation and Operation Manual
23
Diagram Horizontal
Vertical Equivalent Length (ft)
1 Direct Vent (Concentric Pipe and Twin Pipe)
Produc t Description
Manufacturer Part Number
Manufacturer
CENTROTHERM
DURAVENT
2 in. TWIN PIPE TERMINATIONS
ISELL0287UV
2 in. 87° Long PPS-UV
6
ISTT0220
2 in. Termination Tee
6
ISLPT0202
2 in. Low Profile Wall
Termination
5
2PPS-HTPL
2 in. Twin Pipe Termination
10
2PPS-HSTL
2 in. Single Horizontal Termination
6
2PPS-TBL
2 in. Black UV Resistant Tee
5
196984
FGV PVC Low Profile
Termination Kit
5
081216
FGV PVC Wall Termination Kit
16
52SWVKGVS6502 PVC Side Wall Vent Kits 5
52WTVKGVS6502 PVC Wall Vent Kits 16
IPEX
ROYAL
24
Rinnai Tankless Water Heater Installation and Operation Manual
1 Direct Vent (Concentric Pipe and Twin Pipe)
Diagram Horizontal
Vertical Equivalent Length (ft)
Produc t Description
Manufacturer Part Number
Manufacturer
DURAVENT CENTROTHERM
ISELL0387UV ISTT0320 ISLPT0303 3PPS-HTPL 3PPS-HSTL 3PPS-TBL 196985
081219
3 in. TWIN PIPE TERMINATIONS
3 in. 87° Long PPS-UV 3 in. Termination Tee 3 in. Low Profile Wall Termination 3 in. Twin Pipe Termination 3 in. Single Horizontal Termination 3 in. Black UV Resistant Tee FGV PVC Low Profile Termination Kit
FGV PVC Wall Termination Kit
52SWVKGVS6503 PVC Side Wall Vent Kits 52WTVKGVS6503 PVC Wall Vent Kits
IPEX
ROYAL
Air Filter Screen Tee
VARIOUS 2 in. OR 3 in. SCHEDULE 40 PVC/CPVC TERMINATIONS
90° Elbow
45° Elbow
Rinnai Tankless Water Heater Installation and Operation Manual
6 6 5 10 5 6 5
16
5
16
N/A 5 5 2.5
25
1 Direct Vent (Concentric Pipe and Twin Pipe)
Direct Vent Termination Clearances (For Concentric and Twin Pipe)
TERMINATION
Clearance in Ref. A also applies to anticipated snow line
X AIR SUPPLY INLET
V VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITTTED
SNOW
Canadian Installations (CSA B149.1)
Ref
Description
A Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Direct Vent (Indoor Unit) 12 in. (30 cm) 36 in. (91 cm) *
D
Vertical clearance to ventilated soffit, located above the terminal within a horizontal distance of 2 ft (61 cm) from the center line of the terminal
*
E Clearance to unventilated soffit
*
F Clearance to outside corner
*
G Clearance to inside corner
*
H
Clearance to each side of center line extended above meter/regulator assembly
*
I Clearance to service regulator vent outlet
Above a regulator within 3 ft (91 cm) horizontally of the vertical center line of the regulator vent
outlet to a maximum vertical distance of 15 ft (4 m)
J
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance
36 in. (91 cm)
K Clearance to a mechanical air supply inlet
6 ft (1.83 m)
L
Clearance above paved sidewalk or paved driveway located on public property
7 ft (2.13 m) [1]
M Clearance under veranda, porch, deck, or balcony
12 in. (30 cm) [2]
U.S. Installations (ANSI Z223.1 /NFPA 54) Direct Vent (Indoor Unit)
12 in. (30 cm) 12 in. (30 cm)
* * * * * *
*
12 in. (30 cm) 3 ft (91 cm) above if within
10 ft (3 m) horizontally *
*
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
Clearances are in accordance with local installation codes and the
requirements of the gas supplier. (Dégagement conforme aux codes d'installation locaux et aux exigences du foumisseur de gaz.)
26
Rinnai Tankless Water Heater Installation and Operation Manual
1 Direct Vent (Concentric Pipe)
Concentric Pipe Overview
Combustion air and exhaust vent directly through a single concentric connection. Hot exhaust exits through the interior tube, while combustion air enters through the outer layer.
Exhaust Combustion
air
Combustion air
Concentric Pipe Termination Clearances
60 in. (1.52 m)
Note: 24 in. (0.61 m) to wall or parapet
12 in. (0.30 m)
12 in. (0.30 m)
Inside Corner
60 in. (1.52 m) vertically between terminals
Between terminals at different levels
12 in. (0.30 m)
Between terminals at same level All terminations (horizontal and/or vertical) must terminate 12 in. (0.30 m) above grade or anticipated snow level.
Rinnai Tankless Water Heater Installation and Operation Manual
27
1 Direct Vent (Concentric Pipe)
Concentric Pipe Installation Instructions
1
Remove and discard screw from concentric flue connection.
2
Remove exhaust adapter ring (discard for concentric venting configurations).
3
Install the concentric vent. Ensure it is properly seated.
Concentric Vent
Mount Concentric Pipe Through Wall
If venting through an exterior wall, align the wall mounting bracket template (located in literature bag) to the wall and follow the instructions on the template for appropriate vent hole location. Use a level to make sure the wall mounting bracket is even and level.
SAMPLE
Illustrative Purposes Only
Wall Mounting Bracket Template
Level Wall Mounting Bracket
Concentric Pipe Example Vent Applications
Horizontal Wall Terminations 2 in. x 4 in.
Vertical Roof Terminations
2 in. x 4 in. and
3 in. x 5 in.
3 in. x 5 in.
4
Secure the vent pipe to the concentric flue connection with the supplied screw.
Concentric Pipe Maximum Vent Length
Concentric Vent Maximum Equivalent Length
Vent Sizes
2 in. X 4 in.
3 in. X 5 in.
Vent Lengths 65 ft (20 m)
150 ft (46 m)
· 45° elbow is equivalent to 3 ft (1 m) · 90° elbow is equivalent to 6 ft (2 m)
Important: Install the venting termination according to the diagrams and instructions in this manual. Slope the venting 1/4 in. per foot toward the appliance according to the vent manufacturer's installation instructions. Dispose of condensate per local codes.
28
Rinnai Tankless Water Heater Installation and Operation Manual
1 Direct Vent (Twin Pipe)
Twin Pipe Overview
Combustion air and exhaust vent directly through separate penetrations.
Combustion air
Exhaust
Twin Pipe Termination Clearances
12 in. (0.30 m) minimum
12 in. (0.30 m) minimum
Wall
Exhaust Zone
60 in. (1.5 m) minimum
Exhaust
12 in. (0.30 m) minimum above combustion air opening
Combustion Air
Roof
12 in. (0.30 m) above grade or anticipated snow level
Twin Pipe Vertical Termination of Multiple Water Heaters
Exhaust
12 in. (0.30 m) minimum
12 in. (0.30 m) above grade or anticipated snow level
Combustion Air
Combustion air termination not permitted in shaded area
Horizontal Vent and Combustion Air Piping
For illustration purposes only. Listed equivalent length is based on worst case scenario of 3 X 90° elbows or 18 equivalent ft.
Rinnai Tankless Water Heater Installation and Operation Manual
29
1 Direct Vent (Twin Pipe)
Twin Pipe Installation Instructions
The water heater is equipped with a 2 in. (51 mm) pipe connection. With the use of a pipe reducer, installers can use a 3 in. (76 mm) pipe for the combustion air and exhaust.
WARNING
DO NOT apply PVC glues, solvents, or cleaners to the water heater's combustion air or exhaust gasket connections. Failure to correctly assemble the components according to these instructions may result in property damage, personal injury, or death.
1
Remove and discard the screw from the combustion air vent connection.
2
Remove and discard the combustion air vent cap.
3
Install the combustion air vent pipe. Ensure it is properly seated.
Secure the combustion air vent pipe to the combustion air vent connection with the supplied screw.
4 Install the exhaust vent pipe. Ensure it is
properly seated. Secure the exhaust vent pipe to the exhaust adapter ring with the supplied screw.
Combustion Air Vent Pipe Supplied screw
Exhaust Vent Pipe Supplied screw
30
Rinnai Tankless Water Heater Installation and Operation Manual
1 Direct Vent (Twin Pipe)
Twin Pipe Example Vent Applications
Slope horizontal exhaust 1/4 in. per foot towards the water heater. DO NOT slope combustion air pipe towards the water heater.
This configuration requires the use of
a Concentric Vent Termination
2 in. or 3 in. PVC/CPVC IPEX / Royal Concentric Side Wall Termination Configuration
This configuration requires the use of a Concentric Vent Termination
2 in. or 3 in. PVC/CPVC IPEX /Royal Concentric
Vertical Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC
Snorkel Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC
Standard upside down "U" Vertical Termination Configuration
2 in. or 3 in.
Schedule 40 PVC/CPVC Elbow or Tee Side Wall Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC Tee
Vertical Termination Configuration
2 in. or 3 in. PVC Low Profile
Termination Configuration
Twin Pipe Maximum Vent Length
Twin Pipe Maximum Equivalent Length Table
Vent Sizes
2 in. (51 mm) 3 in. (76 mm)
Vent Lengths 65 ft (20 m) 150 ft (46 m)
· 45° elbow is equivalent to 3 ft (1 m) · 90° elbow is equivalent to 6 ft (2 m)
WARNING
Exhaust and combustion air MUST NOT be brought together into
a single PVC pipe using a pipe fitting.
Combustion Air
Rinnai Tankless Water Heater Installation and Operation Manual
Single Pipe Exhaust
31
2 Non-Direct Vent (Room Air and External)
Room Air and External Termination Clearances
TERMINATION
Clearance in Ref. A also applies to anticipated snow line
SNOW
X AIR SUPPLY INLET
V VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITTTED
Ref
Description
A Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit, located above the D terminal within a horizontal distance of 2 ft (61 cm) from
the center line of the terminal
E Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
H
Clearance to each side of center line extended above meter/regulator assembly
I Clearance to service regulator vent outlet
J
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance
K Clearance to a mechanical air supply inlet
L
Clearance above paved sidewalk or paved driveway located on public property
M Clearance under veranda, porch, deck, or balcony
Canadian Installations (CSA B149.1)
Other than direct vent (Outdoor unit and/or Room Air)
12 in. (30 cm) 36 in. (91 cm)
*
*
* * * * Above a regulator within 3 ft (91 cm) horizontally of the vertical center line of the regulator vent outlet to a maximum vertical distance of 15 ft (4 m) 36 in. (91 cm)
6 ft (1.83 m)
7 ft (2.13 m) [1] 12 in. (30 cm) [2]
U.S. Installations (ANSI Z223.1 /NFPA 54) Other than direct vent (Outdoor unit and/or Room Air)
12 in. (30 cm) 4 ft (1.2 m) below or to side of opening;
1 ft (300 mm) above opening *
*
* * * *
*
4 ft (1.2 m) below or to side of opening; 1 ft (300 mm) above opening
3 ft (91 cm) above if within 10 ft (3 m) horizontally * *
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
Clearances are in accordance with local installation codes and the
requirements of the gas supplier. (Dégagement conforme aux codes d'installation locaux et aux exigences du foumisseur de gaz.)
32
Rinnai Tankless Water Heater Installation and Operation Manual
2 Non-Direct Vent (Room Air and External)
NOTE: Installation of Non-Direct Vent (Room Air) must use listed category IV venting. NOTE: All terminations (horizontal and/or vertical) must terminate 12 in. above grade or anticipated snow level.
Termination Clearances for External (Outdoor) Water Heaters
12 in. (0.30 m)
Inside Corner
2 in. 36 in. (0.91 m) to ventilated or unventilated soffit or eve vent; or to a deck or porch
60 in. (1.52 m) vertically between terminals
Exhaust Termination Clearances for Internal (Indoor) Room Air Applications
12" (0.30 m)
Inside Corner
12" 60" (1.52 m) vertically between terminals
Rinnai Tankless Water Heater Installation and Operation Manual
33
2 Non-Direct Vent (Room Air)
Combustion Air
WARNING
This water heater requires adequate combustion air for ventilation and dilution of flue gases. Failure to provide adequate combustion air can result in unit failure, fire, explosion, serious bodily injury or death. Use the following methods to ensure adequate combustion air is available for correct and safe operation of this water heater.
Important: Combustion air must be free of corrosive chemicals. Do not provide combustion air from corrosive environments. Appliance failure due to corrosive air is not covered by warranty.
For applications containing corrosive indoor air, this appliance must be installed as direct vent. DO NOT use room air in applications where combustion air contains acid forming chemicals such as sulfur, fluorine and chlorine. These chemicals have been found to cause rapid damage and decay and can become toxic when used as combustion air in gas appliances. Such chemicals can be found in, but not limited to bleach, ammonia, cat litter, aerosol sprays, cleaning solvents, varnish, paint and air fresheners. Do not store these products or similar products in the vicinity of this water heater.
Unconfined Space
An unconfined space is defined in National Fuel Gas Code, ANSI Z223.1/NFPA 54 as "a space whose volume is not less than 50 cubic feet per 1000 Btu/hr (4.8 m3 per kW per hour) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space." If the "unconfined space" containing the appliance(s) is in a building with tight construction, additional outside air may be required for proper operation. Outside air openings should be sized the same as for a confined space.
Confined Space
A confined space is defined in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 as "a space whose volume is less than 50 cubic feet per 1000 Btu/hr (4.8 m3 per kW per hour) of the aggregate input rating of all appliances installed in that space." Examples include a small room, closet, alcove, utility room, etc. A confined space must have two combustion air openings. Size the combustion air openings based on the BTU input for all gas utilization equipment in the space and the method by which combustion air is supplied.
Using Indoor Air For Combustion: When using air from other room(s) in the building, the total volume of the room(s) must be of adequate volume (Greater than 50 cubic feet per 1000 Btu/hr). Combustion air openings between joining rooms must have at least 1 square inch of free area for each 1000 Btu/h, but not less than 100 square inches each.
Using Outdoor Air For Combustion
Outdoor air can be provided to a confined space through two permanent openings, one commencing within 12 in. (0.30 m) of the top and one commencing within 12 in. (0.30 m) of the bottom, of the confined space. The openings shall communicate to the outside by one of two ways.
When communicating directly with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in2/2000 Btu/hr (1100 mm2/kW) of total input rating of all appliances in the confined space.
Note: If ducts are used, the cross sectional area of the duct must be greater than or equal to the required free area of the openings to which they are connected.
34
Rinnai Tankless Water Heater Installation and Operation Manual
2 Non-Direct Vent (Room Air)
Combustion Air (Continued)
Louvers and Grills
When sizing the permanent opening consideration must be taken for the design of the louvers or grills to maintain the required free area required for all gas utilizing equipment in the space. If the free area of the louver or grill design is not available, assume wood louvers will have 25% free area and metal louvers or grills will have 75% free area. Under no circumstance should the louver, grill or screen have openings smaller than 1/4 in. Example: Wood: 10 in. x 12 in. x 0.25 = 30 in.2
Metal: 10 in. x 12 in. x 0.75 = 90 in.2
Location
To maintain proper circulation of combustion air two permanent openings (one upper, one lower) must be positioned in confined spaces. The upper shall be within 12 in. (0.30 m) of the top of the confined space and the lower opening shall be within 12 in. (0.30 m) of the bottom of the confined space. Openings must be positioned as to never be obstructed.
10 in. (250 mm)
12 in. (300 mm)
NOTICE
Combustion air provided to the appliance should not be taken from any area of the structure that may produce a negative pressure (i.e. exhaust fans, powered ventilation fans).
WARNING
TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION, COMMON VENTING WITH OTHER MANUFACTURER'S INDUCED DRAFT APPLIANCES IS NOT ALLOWED.
Checklist for Combustion Air and Venting Requirements
Verify all combustion air opening sizes are correct. Ensure that the Combustion Air Requirements are followed that will provide sufficient combustion air for the
appliance.
DO NOT use room air for combustion in applications where the indoor air is corrosive. Verify that adequate combustion air is available for all appliances installed in the space. Installation complies with National Fuel Gas Code, ANSI Z223.1/NFPA 54 as well as local and state
regulations therein.
Rinnai Tankless Water Heater Installation and Operation Manual
35
2 Non-Direct Vent (Room Air)
Non-Direct Vent (Room Air) Installation Instructions
1
Remove and discard screw from combustion air vent connection.
2 Remove and discard the combustion air
vent cap.
3 Install the combustion air vent pipe. Ensure it is properly seated.
Secure the combustion air vent pipe to the combustion air vent connection with the supplied screw.
Supplied screw
Combustion Air Vent Pipe
4
Place the vent screen or room air screen inside elbow and secure with the supplied screw. Use
the room air screen for environments where
room air is dusty.
Note: · 2 in. vent screen supplied with water heater. · Room air screen is available as an accessory.
Vent Screen
Glue elbow to the combustion air PVC vent pipe per manufacturer's instructions.
Elbow
Supplied screw
5
Install the exhaust vent pipe. Ensure it is properly seated.
Secure the exhaust vent pipe to the exhaust adapter ring with the supplied screw.
Exhaust Vent Pipe Supplied screw
36
Rinnai Tankless Water Heater Installation and Operation Manual
2 Non-Direct Vent (Room Air)
Non-Direct Vent (Room Air) Example Vent Applications
2 in. or 3 in. Schedule 40 PVC/CPVC Snorkel Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC Standard Upside Down "U" Vertical Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC Elbow or Tee Side Wall Termination Configuration
2 in. or 3 in. Schedule 40 PVC/CPVC Tee Vertical Termination Configuration
Slope horizontal exhaust 1/4 in. per foot towards the water heater.
Non-Direct Vent (Room Air) Maximum Vent Length
Room Air Maximum Equivalent Length Table
Vent Sizes
2 in. (51 mm) 3 in. (76 mm)
Vent Lengths
65 ft (20 m) 150 ft (46 m)
· 45° elbow is equivalent to 3 ft (1 m) · 90° elbow is equivalent to 6 ft (2 m)
Rinnai Tankless Water Heater Installation and Operation Manual
37
2 Non-Direct Vent (Room Air)
Manufactured (Mobile) Home
For Installation in a Manufactured Home (Mobile Home)
Roof Termination
Roof Flashing
PVC Elbow with Vent Screen
Top and Bottom Mounting Brackets
Condensate Drain Pressure Relief Valve
Hot Water Outlet
Door Gas Supply Cold Water Inlet
Louvered Opening
Pipe Connections on Bottom of Water Heater
To Suitable Drain
6 in. (152 mm) Maximum
Installation Enclosure with Louvered Door for Manufactured Home Applications
· Combustion air must not be supplied from occupied spaces of the manufactured home. Access panels, doors or opening of any kind are not permitted between the installation enclosure and the inside of the manufactured home.
Use the following chart to identify the minimum required size of the opening in the access door.
Model
Input Btu/h
Minimum Required Area
Example Opening Size (LxH)
· The installation enclosure must include an exterior
RU199i
access door incorporating a single opening positioned
a maximum of 6 in. (152 mm) above the lower edge of
the door. The opening in the access door must be
RU180i
metal with no less than 1/4 in. (6.4 mm) mesh.
· The water heater is to be secured to the wall of the
RU160i
manufactured home using the integrated mounting brackets on the back side of the water heater.
RU130i
199,000 180,000 160,000 130,000
200 in2 (0.129 m2)
180 in2 (0.116 m2)
160 in2 (0.103 m2)
130 in2 (0.0839 m2)
20 in. x 10 in. (508 mm x 254 mm)
18 in. x 10 in. (457 mm x 254 mm)
16 in. x 10 in. (406 mm x 254 mm)
13 in. x 10 in. (330 mm x 254 mm)
38
Rinnai Tankless Water Heater Installation and Operation Manual
3 Common Vent (Indoor Units Only. Direct Vent and Non-Direct/Room Air Vent)
Common venting allows multiple Rinnai Tankless Water Heaters to share the same vent system. When operating multiple water heaters in a common venting system, it is recommended to use Rinnai's EZ Connect cable (purchased separately) which electronically connects two water heaters so they function as one hot water source. Do not common vent this water heater with any other water heater or appliance.
Sample Inline, Freestanding Configuration
Common Vent Maximum Equivalent Vent Lengths
Common vent equivalent lengths include polypropylene pipe (PP) or PVC in a back-to-back or inline configuration.
For the table below: · Header is the main vent pipe into which several vents connect. · Vent Length is the distance from the end of the header to the
vent termination. · Maximum vent length starts at the end of the header system.
Header
Vent Length
Common Vent Maximum Vent Length
Vent Diameter
Water Heater Model
# Water Max System
Heaters BTU/HR
3 in.
4 in.
6 in.
RU199i (REU-N3237FF-US) RU180i (REU-N2934FF-US)
2
398,000 360,000
65 ft (20 m)
150 ft (46 m)
150 ft (46 m)
RU160i (REU-N2530FF-US) RU130i (REU-N2024FF-US)
2
320,000 260,000
90 ft
150 ft
150 ft
Rinnai Tankless Water Heater Installation and Operation Manual
39
3.6 Connect the Water Supply
Guidelines
· The piping (including soldering materials) and components connected to this appliance must be approved for use in potable water systems.
· Purge the water line to remove all debris and air. Debris will damage the water heater. · The appliance must not be connected to a system that was previously used with a non-potable water heating
appliance. · Ensure that the water filter on the water heater is clean and installed. · DO NOT introduce toxic chemicals such as those used for boiler water treatment to the potable water used for
space heating.
Instructions
To connect the water supply, follow the instructions below. IMPORTANT: Water connections to the water heater should follow all state and local plumbing codes. If this is a standard installation, refer to the "Piping Diagram for Basic Installation" below. 1. Plumb the cold water supply line to the water heater on the 3/4 in. MNPT connection at the bottom of the water
heater marked "COLD." 2. Plumb the hot water supply line to the 3/4 in. MNPT connection marked "HOT." 3. If a pipe cover will be installed, make sure water lines to the water heater fit within the confinements of the pipe
cover.
PIPING DIAGRAM FOR BASIC INSTALLATION
The condensate drain pipe (along its entire length) must be at least the same diameter as the drain line (1/2 in. NPT).
Refer to section "3.9 Condensate" for more information.
Condensate Drain Line Floor Drain
Gas Supply Line
Hot Water Supply Line
Cold Water Supply Line
40
Rinnai Tankless Water Heater Installation and Operation Manual
3.7 Install the Isolation Valves
Isolation valves (included with water heater) provide the ability to isolate the water heater from the structure's plumbing and allow quick and easy access to flush the heat exchanger. The supplied isolation valves meet American National Standard (ANSI Z21.10.3) / Canadian Standard (CSA 4.3) and are ANSI/NSF 61 approved for potable water.
To install isolation valves:
1. Apply thread sealant to the exposed threads of the Cold Inlet and Hot Outlet of the water heater. 2. Hand tighten the Union Fitting to the Cold Inlet and Hot Outlet of the water heater. 3. With a wrench, tighten the Union Fittings. Do not tight more than 2 turns past hand tight. 4. Position the Hot Isolation Valve (Red) and Gasket below the Union Fitting on the Hot Outlet side of the water
heater. 5. Hand tighten the Union Nut of the Hot Isolation Valve (Red) to the Union Fitting. 6. Rotate the Drain Valve to an accessible position. With a wrench, tighten the Union Nut to the Union Fitting. 7. Repeat steps 4 - 6 for the Cold Isolation Valve (Blue). 8. Connect the Cold Isolation Valve (Blue) to the Cold Water Supply Line. 9. Connect the Hot Isolation Valve (Red) to the Hot Water Supply Line. 10. Ensure that both Drain Valves are in the closed position before turning on water supply.
Hot Outlet
Hot Isolation Valve (Red)
Cold Inlet Union Fitting
Gasket
Union Nut Drain Valve Cold Isolation Valve (Blue)
NOTICE:
DO NOT use pipe dope or thread sealant on union fitting with gasket.
NOTICE:
When unscrewing the union fitting, be careful not to lose the gasket.
Rinnai Tankless Water Heater Installation and Operation Manual
41
3.8 Pressure Relief Valve
WARNING
Water discharged from the pressure relief valve could cause severe burns instantly or death from scalds.
Guidelines
An approved pressure relief valve is required by the American National Standard (ANSI Z21.10.3) for all water heating systems and shall be accessible for servicing. When connecting a pressure relief valve, follow the guidelines below:
· The pressure relief valve must comply with the standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems ANSI Z21.22 and /or the standard Temperature, Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves, CAN1-4.4.
· The pressure relief valve must be rated up to 150 psi and to at least the maximum BTU/hr of the appliance. · The discharge from the pressure relief valve should be piped to the ground or into a drain system per local codes. · The pressure relief valve must be manually operated once a year to check for correct operation. · The discharge line from the pressure relief valve should pitch downward and terminate 6 in. (152 mm) above
drains where discharge will be clearly visible. · The discharge end of the line shall be plain (unthreaded) and a minimum of 3/4 in. nominal pipe diameter. The
discharge line material must be suitable for water at least 180° Fahrenheit. · The pressure relief valve is assembled to the pressure relief valve adapter as illustrated on the next page. DO NOT
place any other valve or shut off device between the pressure relief valve and the water heater. · If a pressure relief valve discharges periodically, this may be due to thermal expansion in a closed water supply
system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the pressure relief valve. · The American National Standard (ANSI Z21.10.3) does not require a combination temperature and pressure relief valve for this appliance. However, local codes may require a combination temperature and pressure relief valve. · Protect pressure relief valve and pressure relief valve discharge line from freezing. Do not plug or restrict flow of the pressure relief valve.
DO NOT plumb the pressure relief valve with the condensate drain; both must be plumbed independently to drain.
DO NOT plug the pressure relief valve and do not install any reducing fittings or other restrictions in the relief line. The pressure relief line should allow for complete drainage of the valve and the line.
DO NOT place any other valve or shutoff device between the pressure relief valve and the water heater.
42
Rinnai Tankless Water Heater Installation and Operation Manual
Pressure Relief Valve Installation Instructions
To install the pressure relief valve, follow the steps below. 1. On the bottom of the tankless water heater, hand tighten the Pressure Relief Valve Assembly and Gasket to the Pressure Relief Valve Union Fitting. 2. Rotate the Pressure Relief Valve Assembly to the desired accessible position. With a wrench, tighten the Union Nut to the Pressure Relief Valve Union Fitting.
Pressure Relief Valve Union Fitting
Gasket Union Nut
Pressure Relief Valve Assembly
The Pressure Relief Valve Assembly can rotate 360° to accommodate the application.
NOTICE:
DO NOT use pipe dope or thread sealant on union fitting with gasket.
NOTICE:
Be careful not to lose or throw away the gasket.
Rinnai Tankless Water Heater Installation and Operation Manual
43
3.9 Condensate
Condensate Guidelines
To prevent condensate damage, follow these guidelines:
· Do not plumb the condensate drain with the pressure relief valve; both must be plumbed independently to drain.
· All condensate must drain and be disposed of according to local codes.
· Use only corrosion resistant materials for the condensate drain lines such as PVC pipe or plastic hose.
· The condensate drain pipe (along its entire length) must be at least the same diameter as the drain line (1/2 in. MNPT).
· Condensation drain lines installed in areas that are subject to freezing temperatures should be wrapped with an approved supplemental heat source. Install per manufacturer's instructions.
· Slope the condensate drain lines toward the inside floor drain or condensate pump.
· The end of the condensate drain pipe should be open to the atmosphere. The end should not be under water or other substances.
CORRECT
Pipe open to atmosphere
NOT CORRECT
Pipe submerged in water
Water Level
Water Level
· For external (outdoor) installations, to minimize freezing of the condensate, run the condensate drain line through an interior wall or between insulation and an interior wall.
· If a floor drain is not available or the drain is above the level of the condensate drain, a condensate pump should be installed.
· A condensate neutralizer kit is available from Rinnai. The kit allows condensate to flow through neutralizing media that raises the pH of the condensate to a level that will help prevent corrosion of the drain and public sewer system. Refer to section "2.4 Accessories" for more information.
· The condensate drain pipe should be as short as possible and have a downward pitch.
· The condensate trap will automatically prime (selfprime) during operation of the water heater as condensate forms. Condensate draining from the water heater indicates that the trap is full and that there is no blockage in the condensate drain. It is not necessary to add water to the condensate trap.
DO NOT
· DO NOT connect the condensate drain line with an air conditioning evaporator coil drain.
· Water heaters have an integrated condensate trap. DO NOT install an external condensate trap.
EXTERNAL TRAP NOT REQUIRED
Pipe open to atmosphere
44
Neutralizer
Refer to neutralizer Installation Manual and local codes for neutralizer installation guidelines.
Condensate Pump
Pipe open to atmosphere
Rinnai Tankless Water Heater Installation and Operation Manual
Condensate Drain Pipe Connection
To connect the condensate drain pipe:
1. Apply thread sealant to 1/2 in. MNPT condensate drain port.
2. Thread 1/2 in. NPT fitting onto condensate drain port. 3. Follow the steps in the next section: "Condensate Pump Safety Switch
Wiring."
Condensate Pump Safety Switch Wiring
IMPORTANT: The steps in this section must conform with local codes and the guidelines established by the National Electrical Code (NEC). The condensate pump (if installed) should be wired to deactivate the water heater in the event the condensate pump fails. 1. Disconnect power from the water heater. 2. Open the water heater cover and locate 2 white wires
labeled "To Condensate Pump Safety Switch." 3. Cut crimp connectors off white wires and strip the
insulation off of the two ends. 4. Select an appropriate length of wire (18 AWG or
greater) and strip the insulation off the ends. Follow the wiring guidelines established by the National Electrical Code (NEC).
To Condensate Pump Safety Switch
Cut off crimp connectors
Strip insulation off both ends
of wire
Condensate Drain
1/2 in. MNPT
5. With wire nuts or other approved wire connectors, connect the "To Condensate Pump Safety Switch" wires to the normally open contacts on the condensate pump (see image below).
6. Reconnect power to the water heater and press the "On/Off" button on the controller.
Test Operation
1. Test the operation of the shut off switch by unplugging the condensate pump and filling the condensate reservoir with water until the float switch closes the circuit.
2. Turn on the water heater.
3. The water heater displays diagnostic code "25."
4. Plug in the condensate pump in and confirm condensate is flowing out of the reservoir.
5. Turn off the water heater by pressing the "On/Off" button on the controller. Wait 5 seconds then turn the power back on. This will clear the diagnostic code.
Tankless Water Heater
Condensate Pump Safety Switch Installation
To Condensate Pump Safety Switch Wires
Wire Nut Connecting Two Wires
Installer-Supplied Wires
Safety switch wires connect to the NO and COM contacts on the safety switch.
COM NC
NO
Safety Switch Wires
Condensate Pump (installer-supplied) Includes internal safety switch and power cord. Power cord must be plugged into power source.
Rinnai Tankless Water Heater Installation and Operation Manual
· NO - Normally Open · NC - Normally Closed · COM - Common (Neutral)
45
3.10 Connect the Gas Supply
WARNING
· A licensed professional must install the gas supply. · Turn off 120V power supply. · Turn off the gas. · Gas is flammable. Do not smoke or provide other ignition sources while working with gas. · Do not turn on the water heater or gas until all fumes are gone.
Instructions
To connect the gas supply, follow the instructions below:
1. Install a manual gas control valve in the gas supply line to the water heater. A union can be used on the connection above the shut off valve for the future servicing or disconnection of the water heater.
2. Check the type of gas and gas supply pressure before connecting the water heater. If the water heater is not of the gas type that the building is supplied with, DO NOT connect the water heater. Contact the dealer for the proper water heater to match the gas type.
3. Check the gas supply pressure immediately upstream at a location provided by the gas company. Supplied gas pressure must be within the limits shown in section "2.5 Specifications" with all gas appliances operating.
4. Before placing the appliance in operation, all joints including the heater must be checked for gas tightness by means of soap, gas leak detector solution, or an equivalent nonflammable solution, as applicable. (Since some leak test solutions, including soap and water, may cause corrosion or stress cracking, the piping shall be rinsed with water after testing, unless it has been determined that the leak test solution is non-corrosive.)
5. Use approved connectors to connect the water heater to the gas line. Purge the gas line of any debris before connection to the water heater.
6. Any compound used on the threaded joint of the gas piping shall be a type that resists the action of liquefied petroleum gas (propane/LPG).
7. The gas supply line shall be gas tight, sized, and so installed as to provide a supply of gas sufficient to meet the maximum demand of the heater and all other gas consuming appliances at the location without loss of pressure. If in doubt about the size of the gas line, refer to the "Gas Pipe Sizing Reference Tables" section on the next page.
8. Perform a leak and pressure test prior to operating the water heater. If a leak is detected, do not operate the water heater until the leak is repaired.
Gas connection 3/4 in. MNPT connection
46
Rinnai Tankless Water Heater Installation and Operation Manual
Gas Pipe Sizing Reference Tables
The gas supply must be capable of handling the entire gas load required at the location. Gas line sizing is based on gas type, the pressure drop in the system, the gas pressure supplied, and gas line type. For gas pipe sizing, refer to the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1
For some tables, you will need to determine the cubic feet per hour of gas required by dividing the gas input by the heating value of the gas (available from the local gas company). The gas input needs to include all gas products at the location and the maximum BTU usage at full load when all gas products are in use.
Use the table for your gas type and pipe type to find the pipe size required. The pipe size must be able to provide the required cubic feet per hour of gas or the required BTU/hour.
The information below is provided as an example. The appropriate table from the applicable code must be used.
GAS PIPE SIZING CALCULATION WORKSHEET
Instructions: Enter values in empty boxes.
Rinnai Model Gas Input:
A
BTU/HR
Additional Appliance Total Gas Input:
B
BTU/HR
Heating Value of Gas:
C
BTU/FT3
Cubic Feet Per Hour (CFH):
(CFH) =
A+ B C
(CFH) =
ANSWER: CFH =
FT3/HR
Natural Gas
Pressure Drop 0.5 in. w.c.
Information in table obtained from NFPA 54, ANSI Z223.1 - 2015.
1/2
Schedule 40 Metallic Pipe
Inlet Pressure: Less than 2 psi
Specific Gravity: 0.60
Nominal Pipe Size (in.)
3/4
1
1 1/4
Length in ft (meters) 10 (3) 20 (6) 30 (9) 40 (12) 50 (15) 60 (18) 70 (21) 80 (24) 90 (27)
100 (30)
Capacity in Cubic Feet of Gas per Hour
172
360
678
1,390
118
247
466
957
95
199
374
768
81
170
320
657
72
151
284
583
65
137
257
528
60
126
237
486
56
117
220
452
52
110
207
424
50
104
195
400
Rinnai Tankless Water Heater Installation and Operation Manual
EXAMPLE Rinnai Model Gas Input:
A 199,000 BTU/HR
Additional Appliance Total Gas Input:
B 65,000 BTU/HR
Heating Value of Gas:
C
1,000 BTU/FT3
Cubic Feet Per Hour (CFH):
(CFH) =
A+ B C
199,000+65,000 (CFH) =
1000
ANSWER:
CFH = 264
FT3/HR
For this example, the pipe diameter must be at least 3/4 in. pipe size and 10 ft (3 m) in length.
47
Natural Gas
Pressure Drop 3.0 in. w.c.
Intended use: Initial supply pressure of 8.0 in. w.c. or greater.
Information in table obtained from NFPA 54, ANSI Z223.1 - 2015.
Schedule 40 Metallic Pipe Inlet Pressure: Less than 2 psi Specific Gravity: 0.6
Nominal Pipe Size (in.)
1/2
3/4
1
1 1/4
Length in ft (meters)
Capacity in Cubic Feet of Gas per Hour
10 (3)
454
949
1,790
3,670
20 (6)
312
652
1,230
2,520
30 (9)
250
524
986
2,030
40 (12)
214
448
844
1,730
50 (15)
190
397
748
1,540
60 (18)
172
360
678
1,390
70 (21)
158
331
624
1,280
80 (24)
147
308
580
1,190
90 (27)
138
289
544
1,120
100 (30)
131
273
514
1,060
Propane (Undiluted)
EXAMPLE Rinnai Model Gas Input:
A 199,000 BTU/HR
Additional Appliance total Gas Input:
B 65,000 BTU/HR
Heating Value of Gas:
C
1,000
BTU/FT3
Cubic Feet Per Hour (CFH):
(CFH) =
A+ B C
199,000+65,000 (CFH) =
1000
ANSWER:
CFH =
264
FT3/HR
For this example, the pipe diameter must be at least 1/2 in. nominal pipe size and 20 ft (6 m) in length.
Pressure Drop 0.5 in. w.c.
Information in table obtained from NFPA 54, ANSI Z223.1 - 2015.
Schedule 40 Metallic Pipe Inlet Pressure: 11 in. w.c. Specific Gravity: 1.50
Length in ft (meters) 10 (3) 20 (6) 30 (9) 40 (12) 50 (15) 60 (18) 80 (24)
100 (30)
Nominal Inside Pipe Size (in.)
1/2
3/4
1
1 1/4
Capacity in Thousands of BTU per Hour
291
608
1,150
2,350
200
418
787
1,620
160
336
632
1,300
137
287
541
1,110
122
255
480
985
110
231
434
892
101
212
400
821
94
197
372
763
EXAMPLE Rinnai Model Gas Input:
A 199,000 BTU/HR
Additional Appliance Total Gas Input:
B 65,000 BTU/HR
Total Gas Input: Total Gas = A + B Input
Total Gas = 199,000+65,000 Input
ANSWER:
Total Gas Input
=
264,000
BTU/HR
For this example, the pipe diameter must be at least 1/2 in. nominal pipe size and 10 ft (3 m) in length.
48
Rinnai Tankless Water Heater Installation and Operation Manual
3.11 Connect the Power Supply
WARNING
· Do not use an extension cord or adapter plug with this appliance. · The water heater must be electrically grounded in accordance with local codes and ordinances or, in the absence
of local codes, in accordance with the National Electrical Code, ANSI/NFPA No. 70. · Indoor water heaters are equipped with a three-prong (grounding) plug for your protection against shock hazard
and should be plugged directly into a properly grounded three-prong receptacle. Do not cut or remove the grounding terminal from this plug.
Guidelines
When connecting the power supply, follow these guidelines:
· Do not rely on the gas or water piping to ground the water heater. Ground locations are provided inside the water heater.
· The water heater requires 120 VAC, 60 Hz power from a properly grounded circuit. · If using the 5 ft (1.5 m) power cord (supplied with internal/indoor water heaters), plug it into a standard 3 prong
120 VAC, 60 Hz properly grounded wall outlet. · On external (outdoor) models, a disconnect switch must be provided and installed for the incoming 120 VAC
power. The switch should be a type that is suitable for outdoor use. Check the National Electrical Code, ANSI/NFPA 70 and your local codes for a proper switch type to use in your area. Power connections must be protected from the weather and flexible cords must use an appropriate strain relief. · The wiring diagram is located on the inside of the water heater front cover.
120V Wiring · White wire (Neutral) · Black wire (Hot leg)
Ground connection screw
Disconnect switch (required on external (outdoor) models)
Post-Power Supply Connection Checklist Confirm that the electricity is supplied from 120 VAC, 60 Hz power source and is in a properly grounded circuit. Confirm that an extension cord or an adapter plug has NOT been used with the water heater.
Rinnai Tankless Water Heater Installation and Operation Manual
49
3.12 Parameter Settings
WARNING DO NOT adjust parameter settings
unless specifically instructed to do so.
Certain elements of the installation may require adjusting the parameters of the tankless water heater. To adjust the parameters: 1. Locate the PC Board (lower right side of unit). 2. Locate the two push buttons (A and B) on the PC Board. 3. Press the "A" button for 1 second.
A
4. Use the (Up) and (Down) buttons on the controller to select a setting number (see Parameter Settings Table below).
5. Once the desired setting number is selected, use the "On/Off" button on the controller to change the selection for the setting number. Example: Display will change from 01A to 01b for Maximum Temperature setting (as shown below).
B
01A
01B
6. To exit the parameters, press the "A" button for 1 second.
Parameter Settings Table
Default is A for all settings below except 10, 12, 13, and 14 which are factory set.
SETTING #
SETTING DESCRIPTION
0 1 Maximum Set Temperature
02
High Altitude (Installation Location)
03
Service Soon1
04
Recirculation Settings
05
Recirculation Mode2
06
Control Switch
07 Units in Standby (EZ Connect)
10
Gas Type (Factory Set)
11
Maximum Flow Rate4
12
Water Heater Model
13
(Factory set values and
14
not adjustable)
A 120° F 0 - 2,000 ft (0 - 610 m) Disabled
No Recirculation
Comfort BMS3 2 NG
Standard Without Pump
199 (3237) Internal (Indoor)
SELECTION
c
140° F
2,001 - 5,400 ft 5,401 - 7,700 ft 7,701 - 10,200 ft (610 - 1,646 m) (1,646 - 2,347 m) (2,347 - 3,109 m)
0.5 Year
1 Year
2 Years
Recirculation (Dedicated)
Economy
Air Handler (AH)
1
LPG
High
With Pump
180 (2934)
160 (2530)
130 (2024)
External (Outdoor)
1 See section "3.13 Service Indicator (Service Soon, 55)" for more information.
2 Setting 05 is available only if setting 04 is selected.
Comfort mode cycles the pump more frequently, ensuring the loop temperature remains higher (but also uses more energy). Economy mode cycles the pump less often, using less energy to maintain the circulation loop temperature. 3 BMS = Building Management System 4 Selecting "High" will increase the water flow rate to the maximum capacity.
50
Rinnai Tankless Water Heater Installation and Operation Manual
3.13 Service Indicator (Service Soon, 55)
This water heater includes a service indicator (Service Soon, SS). When selected in the parameter settings, an SS code will display on the controller indicating that it is time to flush and service the water heater.
· Selection is installers preference based on water conditions or other factors that may influence the suggested interval of service.
· See the "Parameter Settings" section of this manual for selectable service intervals.
· If Service Soon (55) appears on the controller display, contact your local service provider to flush and service the water heater (see 5.3 Flushing the Heat Exchanger)
· Service Soon will appear again when the time reach to the interval by setting from reset.
To reset Service Soon (55) Press the ON/OFF button 5 times
55
5 TIMES
NOTE: Service Soon (55) will display on the controller again when the water heater reaches the interval selected in the parameter settings.
3.14 Post-Water Heater Installation Checklist
Complete the following checklist when water heater installation is complete. You should be able to answer YES to each question. If you answer NO to any question, installation is not complete. Refer to the applicable section in the Rinnai Tankless Water Heater Installation and Operation Manual for additional information.
For assistance, contact your local dealer or distributor, or call Rinnai Customer Care at 1-800-621-9419.
Reference the Rinnai Tankless Water Heater Installation and Operation Manual For Additional Information on the Items Below
1 INSTALLATION LOCATION Have you verified the unit, vent and air intakes meet the clearance requirements? 2 COMBUSTION AIR & VENTING Have all corrosive compounds been removed from around the combustion air inlet of the tankless water heater? Have you followed the combustion air requirements to provide sufficient combustion air for the tankless water heater? Are the correct venting products for the installed model being utilized? Have you installed the vent screen(s) for PVC vent applications? Have you verified the vent system does not exceed maximum length?
3 PLUMBING Have the water lines been purged of all debris and the filter cleaned? Have you verified the hot and cold water lines to the tankless water heater are not interchanged?
Does the water supply to the heater have adequate pressure? Is it free of chemicals? Did you verify it does not exceed total hardness that will damage the heat exchanger? Have you verified that no toxic chemicals were introduced to the potable water? Did you drain the tankless water heater if not intended to be used immediately? Have water quality issues (if any) been addressed?
Have you performed the leak and pressure test for the tankless water heater and plumbing system?
4 ISOLATION VALVES Are the isolation valves (included with the tankless water heater) installed?
YES NO YES NO
YES NO
YES NO
Rinnai Tankless Water Heater Installation and Operation Manual
51
5 PRESSURE RELIEF VALVE (PRV) Does the PRV comply with the standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems ANSI Z21.22, and/or the standard Temperature, Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves, CAN1-4.4? Did you verify the PRV is rated up to 150 psi and (at least) the maximum BTU/hr of the tankless water heater? Is the discharge from the PRV piped to the ground or into a drain system as per local codes? Is the discharge line from the PRV pitched downward and does it terminate 6 in. (152 mm) above the drains? Is the discharge end of the line plain (unthreaded) and a minimum of 3/4 in. diameter? Is the discharge line material suitable for at least 180° F water? Did you take measures to protect the PRV and PRV discharge line from freezing? Have you verified the PRV is not plumbed with the condensate drain line? Have you verified the PRV is not plugged and that reducing fittings, valves, or other restrictions are not installed in the relief line? 6 CONDENSATE DRAIN
YES NO
YES NO
If the condensate pump is installed, is it wired to deactivate the tankless water heater in the event of failure? For more information, refer to the "Condensate Pump Safety Switch Wiring" section of the manual. Did you verify the condensate drain pipe is as short as possible and has a downward pitch toward the drain or condensate pump? Is all condensate drained and disposed of as per local codes? Did you use ONLY corrosion resistant materials for the condensate drain lines? Did you verify the condensate drain pipe along its entire length is at least the same diameter as the drain line (1/2 in. NPT)? Did you check to ensure the condensation drain lines are protected from freezing?
If a floor pump is not available or the drain is above the level of the condensate drain, did you install a condensate pump? Have you verified the condensate drain line is not plumbed with the pressure relief valve?
Have you confirmed the condensate drain line is not connected with an air conditioning evaporator coil drain?
Have you verified an external condensate trap is not installed? (This tankless water heater has an integrated condensate trap.)
Have you confirmed the end of the condensate drain pipe is open to atmosphere? 7 GAS SUPPLY Did you verify the gas system is appropriately sized? Did you verify the water heater is rated for the gas type supplied? Have you performed a gas line and connection leak test? Did you install a manual gas control valve in the gas line to the water heater? Is the inlet gas pressure within limits? Did you purge the gas line of any debris before connecting the water heater?
YES NO
52
Rinnai Tankless Water Heater Installation and Operation Manual
4. Operate the Water Heater
4.1 Safety Precautions
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.
· Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. · Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor. · WHAT TO DO IF YOU SMELL GAS
· Do not try to light any appliance. · Do not touch any electrical switch; do not use any phone in your building. · Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. · If you cannot reach your gas supplier, call the fire department. · Installation and service must be performed by a qualified installer, service agency or the gas supplier.
AVERTISSEMENT
Assurez-vous de bien suivre les instructions données dans cette notice pour réduire au minimum le risque d'incendie ou d'explosion
ou pour éviter tout dommage matériel, toute blessure ou la mort.
· Ne pas entreposer ni utiliser d'essence ou ni d'autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.
· Avant d'opérer, sentir le gaz autour de la zone de l'appareil. Assurez-vous de sentir à côté du sol car certains gaz sont plus lourds que l'air et se déposeront sur le sol.
· QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
· Ne pas tenter d'allumer d'appareil.
· Ne touchez à aucun interrupteur ; ne pas vous servir des téléphones se trouvant dans le bâtiment.
· Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.
· Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.
· L'installation et l'entretien doivent être assurés par un installateur ou un service d'entretien qualifié ou par le fournisseur de gaz.
· Keep the area around the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
· Do not use this appliance if any part has been under water. Immediately call a licensed professional to inspect the appliance and to replace any part of the control system and any gas control which has been under water. (N'utilisez pas cet appareil s'il a été plongé dans l'eau, même partiellement. Faites inspecter l'appareil par un licence
professionnelle et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l'eau.) · Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.
(En cas de surchauffe ou si l'alimentation en gaz ne s'arrête pas, fermez manuellement le robinet d'arrêt de l'admission de gaz.) · Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it, call a licensed professional. Force or attempted repair may result in a fire or explosion. · This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. DO NOT try to light the burner by hand. · Do not use an extension cord or an adapter plug with this appliance.
· Any alteration to the appliance or its controls can be dangerous and will void the warranty. · If you install this water heater in an area that is known to have hard water or that causes scale build-up the water
must be treated and/or the heat exchanger flushed regularly. Rinnai provides a "Scale Control System" that offers superior lime scale prevention and corrosion control by feeding a blend of control compounds into the water supply. Damage and repair due to corrosive compounds in the air is not covered by warranty. · Keep the combustion air vent pipe location free of chemicals, such as chlorine or bleach, that produce fumes. These fumes can damage components and reduce the life of your appliance. Damage and repair due to scale in the heat exchanger is not covered by warranty. · Always check the water temperature before entering a shower or bath.
· Do not adjust the parameter settings unless specifically instructed to do so.
Rinnai Tankless Water Heater Installation and Operation Manual
53
4.2 Controller
The controller panel allows you to adjust the water temperature, lock the controller on a set temperature, and view diagnostic information.
Display
Indicates the water heater is in use
Increases hot water temperature Decreases hot water temperature
Enables controller when multiple controllers are used
Turns the water heater on or off
Setting the Controller to Mute
To eliminate the beeps when keys are pressed, press and hold both the (Up) and (Down) buttons at the same time until a beep is heard
(approximately 3 seconds). Then, release both buttons. To turn on the beeps, repeat the above steps.
Locking the Controller
1. To lock the internal controller, press and hold down the "Priority" button.
2. While holding down the "Priority" button, press the (Up) button until a beep is heard (approximately 5 seconds). Then, release both buttons at the same time.
3.
appears in the display indicating the controller is locked.
Note: The display flashes between indicate the controller is locked.
and the set temperature to
To unlock the controller, follow the above steps.
LOC
54
Rinnai Tankless Water Heater Installation and Operation Manual
4.3 Setting the Temperature
This water heater requires a minimum flow rate to operate. This rate can be found on the specification page in this manual. In some cases when you are not getting hot water or if the water alternates between hot and cold, it is due to the water flow being below or close to the minimum flow rate. Increasing the flow rate should resolve these problems in these cases.
If you are experiencing issues with higher temperature settings, then reduce the temperature setting. Selecting a temperature closer to that which is actually used at the faucet will increase the amount of hot water being delivered to the faucet, due to less cold water mixing at the fixture.
DANGER
Water temperatures over 125° F (52° C) can cause severe burns or scalding resulting in death. Hot water can cause first degree burns with exposure for as little as:
3 seconds at 140° F (60° C) 20 seconds at 130° F (54° C) 8 minutes at 120° F (49° C) Children, disabled, or elderly are at highest risk of being scalded. Feel water before bathing or showering.
NOTICE While any hot water is being provided, the temperature setting can only be adjusted between 98° F
and 110° F.
NOTICE Check local codes for the maximum water temperature setting allowed when used in nursing homes,
schools, day care centers, and all other public applications.
NOTICE If a newly installed water heater with a controller has not been powered for at least 6 hours then
the temperature will return to the default setting of 104° F (40° C) if power is interrupted.
NOTICE There may be a variation between the temperature displayed on the temperature controller and the
temperature at the tap due to weather conditions or the length of pipe to the water heater.
The controller buttons shown below are located on the outside front panel for internal (indoor) water heaters. For external (outdoor) water heaters, open the front panel to access the controller buttons.
1. If the water heater is off, press the "On/Off" button to turn on. 2. The "Priority" button enables a controller if multiple controllers are being
used. If the "Priority" light is off, then press the "Priority" button on the temperature controller. The orange "Priority" light will glow indicating that this controller is controlling the temperature and that the water heater is ready to supply hot water. The priority can only be changed while no hot water is running.
3. Press the (Up) or (Down) buttons to obtain the desired temperature setting. All hot water sources are able to provide water at this temperature setting until it is changed again at this or another temperature controller.
Rinnai Tankless Water Heater Installation and Operation Manual
55
Available Temperatures with an Internal Controller
The water heater can deliver water at only one temperature setting at a time. The available temperatures are provided below. A temperature lower than 98° F (37° C) can be obtained at the tap by mixing with cold water. To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the "On/Off" button on the controller for 5 seconds while the water heater is OFF.
Temperature Settings
Fahrenheit °F 98 100 102 104 106 108 110 115 120 125* 130* 135* 140* 150** 160** 185**
Celsius °C 37 38 39 40 41 42 43 46 49 52 54 57 60 66 71 85
* These models have a default maximum temperature of 120° F (49° C) and an option to increase the maximum temperature to 140 °F (60 °C). Refer to section "3.12 Parameter Settings" for further details.
** These settings require the installation of the MCC-91-2 controller. When the MCC-91-2 controller is connected, these higher temperatures are available on all controller models in the system. Use of an MCC-91-2 controller in a residential dwelling will reduce the warranty coverage to that of a commercial warranty application.
4.4 Performance Data
To Obtain Performance Data:
Performance Data Table
1. Press and hold the (Down) button.
# DATA
UNIT
2. While holding the (Down) button for 2 seconds,
0 1 Water Flow Rate
press and hold the "On/Off" button (hold both buttons 02 Outgoing Temperature simultaneously).
03 Combustion Hours
x0.1 gal/min °F x100 Hours
04 Combustion Cycles
*
05 Fan Frequency
Hz
06 Additional Controllers Connected *
1
2
07 Water Flow Control Position
0=mid, 1=Open, 2=Closed
3. Use the (Up) and (Down) buttons to scroll to the desired information described in the Performance Data Table.
08 Inlet Temperature 09 Fan Current 1 0 Total Bath Fill Amount
°F x10 mA gGaallloonnss
1 1 HEX Outlet Temperature
°F
12 By-Pass Flow Control Position
Degrees of opening
15
Freeze Protection Temperature (Indoor UnitsOOnnlyly))
°F
4. To exit performance data, repeat step 2 above. 5. When complete, the set temperature appears in the
display.
17
Freeze Protection Temperature (Outdoor UnitsOOnnlyly))
19 Pump Hours
20 Pump Cycles
°F
x100 Hours *
2 1 Exhaust Temperature
°F
* Refer to the Technical Data Sheet located on the inside front cover of the water heater for additional information.
56
Rinnai Tankless Water Heater Installation and Operation Manual
4.5 Diagnostic Codes
To display diagnostic codes:
1. Turn off the water heater by pressing the "On/Off" button.
2. Press and hold the "On/Off" for 2 seconds and then the (Up) button simultaneously.
3. The last 9 maintenance codes display and flash one after the other.
2
4. To exit diagnostic codes and return the water heater to normal
operation, press and hold the "On/Off" button for 2 seconds and
then the (Up) button simultaneously.
1
5. Turn on the water heater by pressing the "On/Off" button.
WARNING
Some of the checks below should be performed by a licensed professional. Consumers should never attempt any action that they are not qualified to perform.
03 Power interruption during bath fill (Water will not flow when power returns)
· Turn off all hot water taps. Press ON/OFF twice.
05 By-Pass Flow Control
· Measure resistance values of the by-pass flow control.* · Replace By-Pass flow control device.
10
Air Supply or Exhaust Blockage/Condensate Trap is Full
· Ensure condensate line is not blocked. · Ensure internal air filter is clean with no obstructions.
(Indoor Water Heaters Only) · Ensure High Altitude setting. (See Parameter Settings) · Ensure Combustion air and Exhaust vents are not blocked
and approved venting materials are being used. (Indoor Water Heaters Only) · Ensure vent length is within limits. (Indoor Water Heaters Only) · Check fan for debris and ensure wheel turns freely. · Verify check valve is not stuck between fan casing and burner body.
1 1 No Ignition (Heater Not Turning On)
· Check that the gas is turned on at the water heater, meter, or cylinder.
· If the system is propane, make sure that gas is in the tank. · Ensure gas type and inlet gas pressure are correct. · Bleed all air from gas lines. · Check the ground wire for the PC Board. · Ensure flame rod wire is connected. · Ensure igniter is operational.* · Check gas solenoid valves for open or short circuits.* · Verify gas orifice is correct.
1 2 No Flame
· Check that the gas is turned on at the water heater, gas meter, or cylinder.
· If the system is propane, make sure that gas is in the tank. · Ensure flame rod wire is connected. · Ensure gas type and inlet gas pressure is correct. · Bleed all air from gas lines.
1 4 Heat Exchanger Overheat
· Measure resistance of Overheat Switch.* · Check heat exchanger surface for hot spots which indicate
blockage due to scale build-up. · Refer to instructions in manual for flushing heat exchanger.
Hard water must be treated to prevent scale build up or damage to the heat exchanger. · Ensure it is not forced Hi setting.
1 5 Venturi Control
· Ensure the Venturi motor is operating correctly.* · Replace gas valve assembly. · Clear diagnostic code by resetting the main power supply
to the water heater.
1 6 High Outgoing Temperature (safety shutdown because water heater is too hot)
· Confirm fan motor is functioning correctly. · Replace the gas valve assembly.
1 7 Venturi Blockage
· Ensure Venturi isn't blocked.
· Please call Rinnai technical department.
1 9 Electrical Grounding
· Check all components for electrical short.
* See "Electrical Diagnostics" on Technical Data Sheet located on inside front cover of water heater.
Rinnai Tankless Water Heater Installation and Operation Manual
57
1 9 Electrical Grounding
· Check all components for electrical short.
2 1 Data Transfer Error
· If the PCB has been replaced, ensure the data transfer process has been completed.
25 Condensate Pump (Accessory)
· Confirm wire connections and harness are good. · Ensure condensate reservoir is empty and condensate
pump is operating.
32 Outgoing Thermistor
33 Heat Exchanger Thermistor
· Check sensor wiring for damage. · Measure resistance of sensor.* · Clean sensor of scale build-up. · Replace sensor.
6 3 Recirculation Low Flow
· Ensure bypass plug is removed and bypass filter is installed. (COV Mode)
· Ensure both the inlet water filter and bypass filter are clean and free of debris.
· Ensure Parameter setting are correctly set for recirculation mode.
· Ensure Pump supply voltage. · Ensure air is removed from the recirculation line.
6 5 Water Flow Control
· Measure resistance values of the water flow control.* · The water flow control valve has failed to close during the
bath fill function. Immediately turn off the water and discontinue the bath fill function. Contact a licensed professional to service the appliance.
7 0 PC Board
· Replace PC Board
38 Exhaust Thermistor
41 Freeze Protection Thermistor
· Check sensor wiring for damage. · Measure resistance of sensor.* · Replace sensor.
51 Inlet Thermistor
· Check sensor wiring for damage. · Measure resistance of sensor.* · Clean sensor of scale build-up. · Replace sensor.
52 Gas Valve
· Check flame rod and wire for damage. · Check gas solenoid valve for open or short circuit.* · Replace gas valve assembly. · Please call Rinnai technical department
5 4 High Exhaust Gas Temperature
7 1 Solenoid Valve Circuit
· Ensure dip switch on PC board is in the OFF position. · Ensure gas control wire is not loose or damaged. · Ensure heater circuit is not grounded. · Replace PC Board.
7 2 Flame Rod
· Check flame rod and wire for damage. · Verify HEX is not leaking.
5 5 (SS) Service Soon (Flush Heat Exchanger)
· 55 is a time-based service indicator set during installation.
See section "3.12 Parameter Settings" for additional details
on setting and changing the 55 indicator.
· 55 indicates that it is time for service. The heat exchanger
should be flushed to prevent damage (refer to section "5.3 Flushing the Heat Exchanger" for more information). Hard water must be treated to prevent scale build-up or damage to the heat exchanger.
· To reset the 55 code, push the On/Off button on the
temperature controller 5 times in 5 seconds.
· Ensure Heat Exchanger fins are clean and not blocked. · Confirm inlet water temperature is not too high. · Clear diagnostic code by resetting the main power supply
to the water heater.
6 1 Combustion Fan
· Check the motor wire harness for loose or damaged connections.
· Measure resistance of motor wire harness.* · Ensure the combustion fan spins freely.
NO CODE - Nothing happens when water flow is activated
· Verify you have at least the minimum flow rate required to fire unit.
· Measure the resistance of the water flow control sensor.* · Clean inlet water supply filter. · On new installations ensure hot and cold water lines are not
reversed.
FF Maintenance Indicator
· Placeholder in Diagnostic code history indicating that a service provider performed maintenance or service.
· Enter this code after performing service by pressing (Up) , (Down) and On/Off simultaneously.
· FF is visible on the monitor.
FF
1
2
3
* See "Electrical Diagnostics" on Technical Data Sheet located on inside front cover of water heater.
58
Rinnai Tankless Water Heater Installation and Operation Manual
5. Maintain the Water Heater
This water heater must be inspected annually by a licensed professional. Repairs and maintenance shall be performed by a licensed professional. The licensed professional must verify proper operation after servicing.
WARNING
To protect yourself from harm, before performing maintenance:
· Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker. (The temperature controller does not control the electrical power.)
· Turn off the gas at the manual gas control valve, usually located immediately below the water heater.
· Turn off the incoming water supply. This can be done at the isolation valve immediately below the water heater or by turning off the water supply to the building.
WARNING
Keep the appliance area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
5.1 Maintenance
The following maintenance items are required for the proper operation of your water heater.
The appliance must be inspected annually by a licensed professional. Repairs and maintenance shall be performed by a licensed professional. The licensed professional must verify proper operation after servicing. CLEANING It is imperative that control compartments, burners, and circulating air passageways of the appliance be kept clean. Check burner flame for proper color. Once ignited, the flame must cover the surface of the burner. The flame must burn with a clear, blue, stable flame. If the flame does not have this appearance, complete the following steps: 1. Turn off and disconnect electrical power. Allow to
cool. 2. Remove the front panel by removing 4 screws. 3. Use a vacuum to remove dust from the main burner
and fan blades. Do not use a wet cloth or spray cleaners on the burner. Do not use volatile substances such as benzene and thinners; they may ignite or fade the paint. 4. Use soft dry cloth to wipe cabinet.
VENT SYSTEM
The vent system should be inspected at least annually for blockages or damage. If the vent is blocked contact a licensed professional.
MOTORS
Motors are permanently lubricated and do not need periodic lubrication. However you must keep fan and motor free of dust and dirt by cleaning annually.
TEMPERATURE CONTROLLER
Use a soft damp cloth to clean the temperature controller. Do not use solvents.
LIME/SCALE BUILD-UP
Scale build-up is caused by hard water and can be accelerated if the water heater is set at a high temperature. Refer to section "5.3 Flushing the Heat Exchanger" for more information. Refer to section "Water Quality Guidelines" to determine if your water needs to be treated or conditioned. The water must be potable, free of corrosive chemicals, sand, dirt, or other contaminates. It is up to the installer to ensure the water does not contain corrosive chemicals, or elements that can affect or damage the heat exchanger. Water that contains chemicals exceeding the levels required affect and damage the heat exchanger. Replacement of the heat exchanger due to water quality damage is not covered by the warranty.
SNOW ACCUMULATION
· Keep the area around flue terminal free of snow and ice. The water heater will not function properly if the combustion air or exhaust vent pipes are impeded (blocked or partially blocked) by obstructions.
· Keep the condensate drain line free of snow and ice. Ensure the line is not blocked or clogged and that condensate is flowing freely.
COASTAL INSTALLATIONS
Installations located in or near coastal areas may require additional maintenance due to corrosive airborne ocean salt. If corrosion is observed on the body of the water heater, the water heater shall be inspected to ensure proper operation and if necessary, repaired or replaced.
Rinnai Tankless Water Heater Installation and Operation Manual
59
FILTERS
· Water Filter -- Clean the inlet water filter by closing the cold and hot water inlet isolation (shut-off) valves. Put a bucket under the filter at the bottom of the water heater to catch any water that is contained inside the unit. Unscrew the water filter. Rinse the filter to remove any debris. Install the filter and open the isolation valves.
· Air Filter -- See section "5.2 Cleaning and Inspecting the Air Filter" for more information.
· Bypass Filter (Crossover Mode Only) -- Clean the bypass filter (Note: Bypass filter is only used in Crossover Mode).
PRESSURE RELIEF VALVE Operate the pressure relief valve manually once a year. In doing so, it will be necessary to take precautions with regard to the discharge of potentially scalding hot water under pressure. Ensure discharge has a safe place to flow. Contact with your body or other property may cause damage or harm.
WARNING
Testing the pressure relief valve should only be performed by a licensed professional. Water discharged from the pressure relief valve could cause severe burns instantly or death from scalds.
VISUAL INSPECTION OF FLAME
Verify proper operation after servicing. The burner must flame evenly over the entire surface when operating correctly. The flame must burn with a clear, blue, stable flame. See the parts breakdown of the burner for the location of the view ports.
The flame pattern should be as shown in the images below:
SATISFACTORY
FRONT VIEW
FLAME ROD
BLUE FLAME
UNSATISFACTORY
FLAME ROD
FRONT VIEW
FREEZE PROTECTION
Make sure in case of freezing weather that the water heater and its water lines are adequately protected to prevent freezing. Damage due to freezing is not covered by the warranty. Refer to the "Freeze Protection" section (Section 3.2 Choose an Installation Location > Freeze Protection). The water heater may be drained manually. However, it is highly recommended that drain down solenoid valves be purchased and installed, which will automatically drain the water heater if power is lost. (The condensate trap drain plug and Pressure Relief Valve are not affected by the auto drain down solenoid valves and will have to be manually opened.)
WINTERIZATION
The following recommendations are intended to suggest practices that are effective for winterizing the water heater. They should be used as a guide only. No liability is assumed for any issues resulting from the use of this information.
Note: See section "5.4 Draining the Water Heater" for detailed instructions on:
· Draining the water heater
· Running a low volume of water through the water heater to prevent freezing
· Steps to take when the water heater or external pipes have frozen
· Gas
Shut off the gas to the water heater. It is generally preferable to shut off the gas service to the entire location if gas is not going to be used.
· Water
Shut off the cold water supply to the water heater. It is generally preferable to shut off the water to the entire location if water is not going to be used.
Drain the water heater by opening the drain valves on the cold water line and hot water line.
Open several hot water taps and remove the filter assembly at the water inlet in order to allow room for expansion in case there is water in the lines that freeze.
· Condensate
Drain the condensate using the condensate drain port on the bottom of the water heater.
· Electric
Disconnect the power supply by either unplugging the electrical cord or by turning off the circuit breaker to the water heater to prevent potential damage from irregular power surges or interruptions.
YELLOW FLAME
60
Rinnai Tankless Water Heater Installation and Operation Manual
5.2 Cleaning and Inspecting the Air Filter (Indoor Units Only)
INSPECTION
· To maintain optimum performance, periodically inspect the air filter.
· If the air filter appears to have lint and/or dust build up, follow the cleaning procedure described below.
· If the air filter appears damaged, contact a trained and qualified professional for a replacement air filter assembly.
CLEANING
1. Power OFF the water heater
· Push the "On/Off" button located on the right-hand side of the controller.
· The display will go blank when the power is off.
2. Remove the front panel.
· Remove the 4 screws securing the front panel. · Remove the front panel and locate the filter at
the upper right-hand corner of the water heater. · Remove the air filter by pulling out the "FILTER Pull to Clean" tab.
3. Clean the Air Filter
· With mild dish soap and a soft bristle brush, scrub the filter area of the air filter door.
· With clean water, rinse the soap off the filter.
4. Dry the Air Filter
· With a lint free towel, dry the air filter.
5. Inspect and Replace the Air Filter
· Inspect the air filter for any debris that may restrict air flow to the water heater.
· If the filter still appears dirty repeat the cleaning steps.
· Replace the air filter.
6. Power ON the water heater.
NOTE: Do not operate this water heater if the air filter is not in place.
Rinnai Tankless Water Heater Installation and Operation Manual
61
5.3 Flushing the Heat Exchanger
This water heater includes a service indicated/reminder (Service Soon, SS). When selected in the parameter settings, an SS code will display on the controller indicating that it is time to flush and service the water heater. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the water heater's warranty. Rinnai strongly recommends installation of isolation valves to allow for flushing of the heat exchanger.
1. Turn off power at the controller.
2. Disconnect electrical power to the water heater.
3. Close the shutoff valves on both the hot water and cold water lines (V3 and V4).
4. Connect pump outlet hose (H1) to the cold water line at service valve (V2).
5. Connect drain hose (H3) to the hot water line at service valve (V1).
6. Pour 4 gallons of undiluted virgin, food grade, white vinegar into pail.
7. Place the drain hose (H3) and the hose (H2) to the pump inlet into the cleaning solution.
8. Open both service valves (V1 and V2) on the hot water and cold water lines.
9. Operate the pump and allow the vinegar to circulate through the water heater for at least 1 hour at a rate of 4 gallons per minute (15.1 liters per minute).
10. Turn off the pump.
11. Rinse the vinegar from the water heater as follows:
a. Remove the free end of the drain hose (H3) from the pail. Place in sink or outside to drain.
b. Close service valve (V2) and open shutoff valve (V4). Do not open shutoff valve (V3).
c. Allow water to flow through the water heater for 5 minutes.
d. Close shutoff valve (V4). When unit has finished draining remove the in-line filter at the cold water inlet and clean out any residue. Place filter back into unit and open valve (V4).
e. Close service valve (V1) and open shutoff valve (V3).
12. Disconnect all hose
13. Restore electrical power to the water heater.
NOTE: Scale build-up will affect the performance of the water heater. Water should be treated. Rinnai offers Southeastern Filtration's "ScaleCutter Water Conditioning System" that offers superior lime scale prevention and corrosion control by feeding a blend of control compounds into the cold water supply.
H3 H1
H2 Circulating Pump (Recommended 4 GPM)
62
Rinnai Tankless Water Heater Installation and Operation Manual
5.4 Draining the Water Heater
WARNING To avoid burns, wait until the equipment cools down before draining the water. The
water in the appliance will remain hot after it is turned off.
If the water heater is not going to be used during a period of possible freezing weather, it is recommended that the water inside the water heater be drained.
CONDENSATE TRAP DRAIN PLUG HOT ISOLATION VALVE PRV LEVER COLD ISOLATION VALVE
To manually drain the water:
1. Shut off cold water supply and gas supply. 2. Turn off the temperature controller. 3. Disconnect the power to the water heater. 4. Close the hot and cold isolation valves. 5. Open the pressure relief valve (PRV) lever. 6. Open the hot and cold drain valves. 7. Remove the condensate trap drain plug and
allow to drain. 8. Remove the pump drain plug (only for pump
version).
HOT DRAIN VALVE
COLD DRAIN VALVE
COLD PRV HOT CONDENSATE
To resume normal operation:
1. Confirm that the gas supply is turned off, all taps are closed and PRV lever is closed.
2. Insert the condensate trap drain plug.
3. Close the hot and cold drain valves. 4. Open the cold and hot water isolation valves.
Piping Diagram
5. Open a tap and confirm that water flows, and then close.
6. Connect power to the water heater.
7. After confirming that the temperature controller is off, turn on the gas supply.
8. Turn on the temperature controller.
Running a low volume of water through the water heater to prevent freezing:
If the temperature exceeds the ability of the water heater to freeze protect itself, or if power is lost, the following steps may prevent the water heater and external piping from freezing. Units connected with EZ Connect (2-unit link) should be drained to prevent freezing if not in use.
ON! COLD
1. Turn the water heater off.
2. Close the gas supply valve. HOT
3. Turn on a hot water tap to flow water about 0.1 gal/min (0.4 L/min) or where the stream is about 0.2 in. (5 mm) thick.
When the water heater or external piping has frozen:
1. Do not operate the water heater if it or the external piping is frozen. 2. Close the gas and water valves and turn off the power. 3. Wait until the water thaws. Check by opening the water supply valve. 4. Check the water heater and the piping for leaks.
Rinnai Tankless Water Heater Installation and Operation Manual
63
6. Appendices
6.1 Wiring Diagram
PC BOARD
64
Rinnai Tankless Water Heater Installation and Operation Manual
6.2 Ladder Diagram
Rinnai Tankless Water Heater Installation and Operation Manual
65
6.3 Pressure Drop and Water Flow Curves
RU130
RU160
RU199 RU180
Dashed lines represent flow rate after parameter adjustment.
Pressure Loss (ft of Head)
Pressure Loss (PSI)
RU199 RU180 RU160
RU130
Water Flow (GPM)
The chart below applies only to incoming water temperatures of 70° F (21° C) or less. For incoming water temperatures greater than 70° F (21° C), please contact Rinnai.
NOTE: Maximum flow rates may vary based on set temperature, Delta T and altitude.
Water Flow (GPM)
Dashed lines represent flow rate after parameter adjustment.
Delta T - Temperature Rise (°F)
66
Rinnai Tankless Water Heater Installation and Operation Manual
6.4 Guidelines for Additional Temperature Controllers
All Rinnai Tankless Water Heaters are equipped with an integrated digital temperature controller that allows for a precise water temperature set-point. Additional digital temperature controllers are available as accessories and must be purchased separately (detailed installation steps included with purchase).
Wiring
A maximum of 4 temperature controllers can be installed for a water heater or bank of water heaters; this includes the controller built into a Rinnai Tankless Water Heater. Controllers can only be wired in parallel; they cannot be wired in series.
Cable Lengths and Sizes
The temperature controller cable should be a non-polarized two-core cable with a minimum gauge of 22 AWG. The maximum cable length from each temperature controller to the water heater depends on the total number of wired controllers connected to the water heater.
Number of Wired Maximum Cable Length for Controllers Each Controller to Water Heater
4 Temperature Controllers
1
328 Ft (100 m)
2
164 Ft (50 m)
3 or 4 *
65 Ft (20 m)
A maximum of 4 temperature controllers can be installed for a water
heater or bank of water heaters (including the built-in controller)
Connect the controller cable to the mating terminal at the bottom right side of the PC Board.
* Only 3 additional controllers can be wired to the water heater.
Location
· The temperature controller should be out of reach of small children.
· Avoid locations where the temperature controller may become hot (near an oven or radiant heater).
· Avoid locations in direct sunlight. The digital display may be difficult to read in direct sunlight.
· Avoid locations where the temperature controller could be splashed with liquids.
· Do not install in locations where the temperature controller can be adjusted by the public.
Wiring illustration (Detailed wiring instructions included with
temperature controller package)
Rinnai Tankless Water Heater Installation and Operation Manual
67
6.5 Massachusetts State Gas Regulations
FOR GAS MODELS SOLD IN MASSACHUSETTS
NOTICE BEFORE INSTALLATION:
This direct-vent appliance must be installed by a properly trained licensed professional. If you are not properly trained, you must not install this unit.
IMPORTANT: In the State of Massachusetts (248 CMR 4.00 & 5.00):
For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than 7 ft above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors
A. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
B. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of 8 ft above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS."
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a)1 through 4.
68
Rinnai Tankless Water Heater Installation and Operation Manual
Massachusetts State Regulations (Continued)
COMBINATION SPACE HEATING/POTABLE WATER SYSTEM (For Use In Commonwealth of Massachusetts)
Rinnai Tankless Water Heater Installation and Operation Manual
69
6.6 Warranty
Limited Warranty for SE+ Series Models
· Internal (Indoor) Models: RU199i, RU180i, RU160i, RU130i · External (Outdoor) Models: RU199e, RU180e, RU160e, RU130e
What Is Covered?
The Rinnai Standard Limited Warranty covers any defects in materials or workmanship when the product is installed and operated according to Rinnai written installation instructions, subject to the terms within this Limited Warranty document. This Limited Warranty applies only to products that are installed correctly in the United States and Canada. Improper installation may void this Limited Warranty. In order for this warranty to apply, it is required that you use a trained and qualified professional who has attended a Rinnai installation training class before installing this water heater. This Limited Warranty coverage as set out in the table below extends to the original purchaser and subsequent owners, but only while the product remains at the site of the original installation. This Limited Warranty only extends to the first / original installation of the product and terminates if the product is moved or reinstalled at a new location.
Item
Residential Applications Commercial Applications
Heat Exchanger*
15 Years
8 Years
All Other Parts and Components
5 Years
5 Years
Reasonable Labor
1 Year
1 Year
*For residential applications, the heat exchanger warranty will be 15 years or 12,000 operation hours, whichever occurs first.
Notes: · From date of purchase, period of coverage is reduced to 8 years or 12,000 operation hours, whichever occurs first, if the Rinnai water heater temperature settings exceeds 160°F (71°C). · The integrated controller has a 1 year warranty on parts.
What Will Rinnai Do?
Rinnai will repair or replace the covered product or any part or component that is defective in materials or workmanship as set forth in the above table. Rinnai will pay reasonable labor charges associated with the repair or replacement of any such part or component during the term of the labor warranty period. All repair parts must be genuine Rinnai parts. All repairs or replacements must be performed by a licensed professional who is properly trained to do the type of repair.
Replacement of the product may be authorized by Rinnai only at its sole discretion. Rinnai does not authorize any person or company to assume for it any obligation or liability in connection with the replacement of the product. If Rinnai determines that repair of a product is not possible, Rinnai may replace the product with a comparable product at Rinnai's sole discretion. The warranty claim for product parts and labor may be denied if a component or product returned to Rinnai is found to be free of defects in material or workmanship; damaged by improper installation, use or operation; or damaged during return shipping.
How Do I Get Service?
You must contact a trained and qualified professional for the repair of a product under this Limited Warranty. For the name of a trained and qualified professional, please contact your place of purchase, visit the Rinnai website (www.rinnai.us), call Rinnai at 1-800-621-9419 or write to Rinnai at 103 International Drive, Peachtree City, Georgia 30269.
Proof of purchase is required to obtain warranty service. You may show proof of purchase with a dated sales receipt, or by registering within 30 days of purchasing the product. To register your Rinnai Tankless Water Heater, please visit www.rinnai.us. For those without internet access, please call 1-866-RINNAI1 (746-6241). Receipt of Registration by Rinnai will constitute proof-of-purchase for this product. Registration of product installed in new home construction may be verified with a copy of the closing papers provided by the initial home buyer. However, Registration is not necessary in order to validate this Limited Warranty.
70
Rinnai Tankless Water Heater Installation and Operation Manual
What Is Not Covered?
This Limited Warranty does not cover any failures or operating difficulties due to the following:
· Accident, abuse, or misuse
·
· Alteration of the product or any component part
· Misapplication of this product
·
· Improper installation (such as but not limited to)
·
Product being installed in a corrosive environment
Condensate damage
·
Improper venting
Incorrect gas type
Incorrect gas or water pressure
Absence of a drain pan under the appliance
· Improper maintenance (such as but not limited to
scale build-up, freeze damage, or vent blockage)
· Incorrect sizing
· Any other cause not due to defects in materials or
workmanship
Problems or damage due to fires, flooding, electrical surges, freezing or any acts of God Any damage caused by poor water quality Operating the water heater with anything other than potable water at all times Force majeure
There is no warranty coverage on product installed in a closed loop application, commonly associated with space heating only applications.
Use of an MCC-91-2 controller in a residential dwelling will reduce the warranty coverage to that of a commercial warranty application except when an MCC-91-2 is used with a hydronic air handler for temperatures no higher than 160°F (71°C).
This Limited Warranty does not apply to any product whose serial number or manufacture date has been defaced.
This Limited Warranty does not cover any product used in an application that uses chemically treated water such as a pool or spa heater.
Limitation on Warranties
No one is authorized to make any other warranties on behalf of Rinnai America Corporation. Except as expressly provided herein, there are no other warranties, expressed or implied, including, but not limited to warranties of merchantability or fitness for a particular purpose, which extend beyond the description of the warranty herein.
Any implied warranties of merchantability and fitness arising under state law are limited in duration to the period of coverage provided by this Limited Warranty, unless the period provided by state law is less. Some states do not allow limitations on how long an implied Limited Warranty lasts, so the above limitation may not apply to you.
Rinnai shall not be liable for indirect, incidental, special, consequential or other similar damages that may arise, including lost profits, damage to person or property, loss of use, inconvenience, or liability arising from improper installation, service or use. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you.
This Limited Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
www.rinnai.us/warranty
Rinnai Tankless Water Heater Installation and Operation Manual
71
100000467
72
Rinnai Tankless Water Heater Installation and Operation M10a/n2u0a1l7
Microsoft Publisher 2016