Rheem Residential Gas Direct Vent Water Heaters
Use & Care Manual with Installation Instructions for the Installer
Residential 40 and 50 Gallon
This manual provides essential information for both installers and owners. It details installation, adjustment, features, operation, safety precautions, maintenance, and troubleshooting for the water heater. It also includes a parts list.
All individuals involved in the installation, operation, or adjustment of this water heater must read and understand these instructions. Seek professional assistance if any part of the instructions is unclear.
For questions regarding operation, maintenance, service, or warranty, contact the seller. Refer to the "If You Need Service" section for additional information.
Do not destroy this manual. Keep it in a safe place for future reference.
⚠️ Recognize this symbol as an indication of Important Safety Information!
⚠️ California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
❗ WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
For Your Safety!
- Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in the vicinity of this or any other appliance. This could result in an explosion or fire.
- 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 and follow their instructions.
- If you cannot reach your gas supplier, call the fire department.
- Do not return to your home until authorized by the gas supplier or fire department.
- Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or death. Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
For Your Records
Write the model and serial numbers here:
_________________________
_________________________
You can find these numbers on a label on the appliance.
Staple sales slip or cancelled check here. Proof of the original purchase date is needed to obtain service under the warranty.
Read This Manual
This manual offers helpful guidance for using and maintaining your water heater. Preventive care can save time and money over the heater's lifespan.
The Troubleshooting Guide contains answers to common problems. Reviewing the Troubleshooting Tips first may eliminate the need to call for service.
Read the Safety Information
Your safety and the safety of others are paramount. This manual and the appliance itself contain numerous important safety messages. Always read and obey all safety messages.
❗ This is the safety alert symbol. It indicates Important Safety Information and alerts you to potential hazards that can cause death or injury.
All safety messages are preceded by the safety alert symbol and one of the following words:
- DANGER: Indicates an imminently hazardous situation that will result in death or serious injury.
- WARNING: Indicates a potentially hazardous situation that could result in death or serious injury and/or damage to property.
- CAUTION: Indicates a potentially hazardous situation that may result in minor or moderate injury.
- Notice: Draws attention to a specified procedure or condition.
Important Safety Information - Read All Instructions Before Using
Thoroughly read and understand this entire Use and Care Manual before attempting to install or operate the water heater. This can save time and cost. Pay close attention to the Safety Instructions. Failure to follow these warnings could result in serious bodily injury or death. If you have difficulty understanding the instructions or have questions, stop and seek assistance from a qualified service technician or the local gas utility.
DANGER! Install the Venting System and Properly Vent the Water Heater
Failure to install the venting system and properly vent the water heater to the outdoors, as outlined in the Venting Section, can lead to unsafe operation, resulting in fire, explosion, or asphyxiation from carbon monoxide. Never operate the water heater unless it is properly vented and has adequate air supply. Inspect the vent system for proper installation at initial start-up and annually thereafter. Refer to the Care and Cleaning section for vent system inspection details.
WARNING! Flammable Materials
Gasoline, flammable materials, and liquids (including adhesives, solvents, paint thinners) and their vapors are extremely dangerous. Do not handle, use, or store these materials near the water heater or its vent pipe terminal, or any other appliance. Read and follow all warning labels on the water heater and in this manual. Failure to do so can result in property damage, bodily injury, or death.
Image Description: A warning label showing flammable vapors emanating from a container, with text indicating a FIRE AND EXPLOSION HAZARD that can result in serious injury or death. It reiterates not to store or use gasoline or other flammable vapors and liquids near appliances.
DANGER! Water Temperature Setting
Safety and energy conservation are key when selecting the water temperature. Temperatures above 125°F (52°C) can cause severe burns or death from scalding. Follow the warnings on the label near the gas control and in this manual.
Time/Temperature Relationship in Scalds
| Water Temperature | Time To Produce a Serious Burn |
|---|---|
| 120°F (49°C) | More than 5 minutes |
| 125°F (52°C) | 1½ to 2 minutes |
| 130°F (54°C) | About 30 seconds |
| 135°F (57°C) | About 10 seconds |
| 140°F (60°C) | Less than 5 seconds |
| 145°F (63°C) | Less than 3 seconds |
| 150°F (66°C) | About 1½ seconds |
| 155°F (68°C) | About 1 second |
Table courtesy of Shriners Burn Institute
This chart helps determine the proper water temperature for your home.
DANGER: Households with small children, disabled, or elderly persons may require a 120°F (49°C) or lower setting to prevent contact with hot water.
Maximum water temperatures occur immediately after the burner shuts off. To check the delivered water temperature, turn on a hot water faucet and place a thermometer in the stream (see pages 20-21 for details).
The temperature is regulated by the dial on the gas control (thermostat). The factory setting is 120°F (49°C).
Illustration Description: A diagram of a gas control dial showing temperature markings from 80°F (27°C) to 160°F (71°C). Reference marks indicate approximate temperatures: 'p' for 120°F (49°C) and 'A' for 130°F (54°C). Each mark represents approximately a 10°F (5.5°C) change.
Notice: Mixing valves can reduce point-of-use water temperature. Consult a licensed plumber or local plumbing authority.
CAUTION: Hotter water increases the risk of scalding.
DANGER! Liquefied Petroleum (LP-Propane or Butane) and Natural Gas Models
LP and Natural gas have an added odorant for leak detection. Some individuals may not smell or recognize this odorant. Consult your gas supplier if unsure. Conditions like "odorant fade" can also mask leaks.
- LP gas water heaters differ from natural gas models. A natural gas unit will not function safely on LP gas, and vice versa.
- Never attempt to convert the water heater between natural gas and LP gas. Connect the unit only to the fuel type specified on the data plate to avoid equipment damage, injury, or fire.
- LP appliances should not be installed below grade if prohibited by federal, state, or local laws.
- LP gas is heavier than air and collects in lower areas, making it harder to detect.
Before lighting: Look and smell for gas leaks. Use a soapy solution on fittings and connections; bubbling indicates a leak. Sniff near the floor for gas.
Gas detectors are recommended for LP and natural gas applications, installed according to manufacturer recommendations and local laws.
Using multiple detection methods (e.g., soapy solution, detectors) is advised.
DANGER: If a gas leak is present or suspected:
- Do not attempt to find the cause yourself.
- Do not try to light any appliance.
- Do not touch electrical switches or use phones in the building.
- Evacuate the house immediately, ensuring family and pets are also evacuated.
- Leave doors open for ventilation.
- Contact the gas supplier, a qualified service agency, or the fire department.
- Stay away from the building until the leak is corrected and the area is deemed safe by a qualified agency.
Important Safety Information - Read All Instructions Before Using
Follow manual information to minimize risks of fire, explosion, electric shock, property damage, personal injury, or loss of life.
For Installations in the State of California
California law requires water heaters to be braced, anchored, or strapped to resist seismic forces. For units up to 52-gallon capacity, obtain bracing instructions from the Office of the State Architect or a water heater dealer. Applicable local codes govern installation; for units over 52 gallons, consult local building jurisdiction.
Safety Precautions
- Have the installer show you the location of the gas shut-off valve and how to operate it. Turn off the valve if the water heater has been subjected to overheating, fire, flood, physical damage, or if the gas supply fails to shut off.
- Read this manual entirely before installing or operating.
- Use the appliance only for its intended purpose.
- Do not attempt to repair or replace parts unless specifically recommended in this manual. Refer all other servicing to a qualified technician.
- Ensure the appliance is properly installed according to local codes and provided instructions.
Read and follow this Safety Information carefully. SAVE THESE INSTRUCTIONS.
Installing the Water Heater
Installation must comply with these instructions, local codes, utility company requirements, and the latest edition of the American National Standard/National Fuel Gas Code (ANSI Z223.1) or NFPA 54. For Canada, use CAN/CSA B149.
Location
Do not locate the water heater where leaks could cause damage to the adjacent area or lower floors. If such areas cannot be avoided, install a suitable, adequately drained catch pan. Catch pan kits are available from the retailer or distributor.
Ensure the floor can support the weight of the filled water heater.
Do not install in spaces where flammable vapors are used or stored (e.g., gasoline, LP gas, paint, adhesives). Flammable vapors can travel and be ignited by the water heater's flame.
Locate the heater to prevent physical damage from vehicles or flooding. Installation in a garage is not desirable.
If local codes require a stand kit to raise the heater 18" (46 cm), contact the store (part # AS29061) or distributor. Kits must comply with local codes.
This is a direct vent design; locate it next to an outside wall within the vent's telescopic range (see page 9 for clearance hole details).
Insulate long hot water lines to conserve water and energy.
Protect the water heater and lines from freezing temperatures.
Do not install in bathrooms, bedrooms, normally closed occupied rooms, or unprotected outdoor areas.
Maintain minimum clearances from combustible construction: 0" sides, 0" rear, and 3" (7.6 cm) from the front of the control. If the label clearances differ, follow the label.
If installed on carpeting, place a metal or wood panel extending at least 3" (7.6 cm) beyond the heater's full width and depth.
If installed in an alcove or closet, the entire floor must be covered by a wood or metal panel. Ensure at least 24" (61 cm) clearance from the front and top for inspection and servicing.
Inspect Shipment
Check the water heater and venting for damage. Verify the gas type on the rating plate matches the supplied gas.
Combustion and Ventilation Air
Proper operation requires combustion and ventilation air, complying with codes and standards.
In unconfined spaces, infiltration air is usually adequate. In confined spaces, specific ventilation provisions are necessary.
All combustion air and products are routed through provided ducting to and from the outside.
Notice: If duct openings are covered with a screen or grill, use the net free area to determine opening size. Protective screening must be at least 1/4" mesh to prevent lint clogging.
Corrosive Atmospheres
Avoid installation in areas with halogenated hydrocarbons (e.g., beauty shops, dry cleaners, photo labs, pool chemical storage). These can release corrosive elements when passing through the flame, shortening appliance life. Propellants from spray cans and A/C refrigerant leaks are also corrosive.
The warranty is void if failure is due to operation in a corrosive atmosphere.
Venting
DANGER: Improper venting can cause injury, explosion, fire, or death. Never operate without proper venting and adequate air supply. Inspect the vent system annually.
CAUTION: Do not install if parts are damaged. Report damage to the distributor or carrier.
Notice: Four screw anchors are needed for the vent cap; these are not provided and must be obtained locally.
Vent Termination Clearances
- Vent terminal must be at least 12" (30.5 cm) above grade, higher in areas with heavy snowfall.
- At least 9" (23 cm) from windows, doors, or other openings.
- At least 36" (91 cm) above any forced air inlet within 10' (3 m).
- At least 18" (46 cm) from overhangs or building corners.
- Do not locate under decks or patio structures.
Locating Clearance Hole for Vent
Cut a clearance hole approximately 6 1/4" (15.8 cm) in diameter through the exterior wall for the 6" (15.2 cm) diameter air tube.
| Capacity | "X" |
|---|---|
| 40 Gallon | 68-1/4" (173.3 cm) |
| 50 Gallon | 68" (172.7 cm) |
Installing the Water Heater
Moving water heater to its final location
Move the water heater to its final installed location, ensuring clearances from combustible materials are observed.
Installing 3" (7.6 cm) Diameter Steel Elbow
- Bend brackets on the elbow as shown.
- Place the 3" steel elbow onto the water heater flue pipe, press firmly down until seated, and point in the desired direction. Apply silicone sealant around the outside of the pipe where the elbow contacts the flue pipe. An improper seal can cause performance issues and nuisance pilot outages.
- Secure the 3" steel elbow to the top pan using two #8 x 3/8" screws through the bent brackets.
Installing 6" (15.2 cm) Diameter Aluminum Elbow
- Install the 6" aluminum elbow over the 3" steel elbow. Ensure both are pointed correctly, with the 3" elbow centered inside the 6" elbow.
Leveling and attaching 6" (15.2 cm) Diameter Aluminum Elbow
- To aid leveling, temporarily place the 6" sliding tube onto the elbow.
- When leveled, drill two 1/8" holes (180° apart) through the elbow into the collar at the front and back. Secure with two #8 sheet metal screws.
- Place the finishing collar on the 6" elbow as it will be positioned later.
Placing 3" (7.6 cm) Diameter Main Vent Tube through Exterior Wall
- Inspect the vent tube kit for three silicone sealing bands.
- Install the 3" main vent tube onto the end of the 3" inner elbow and seal with a silicone band by folding it over the seam.
- Extend the 3" tube assembly to the required length, ensuring at least 2 1/2" extends beyond the outer wall.
- Move high-temperature silicone bands to connecting joints as shown.
Note: An optional kit provides additional adjustment up to 48" (121.9 cm).
Assembling the 6" (15.2 cm) Diameter Vent Tube Assembly w/ Vent Terminal Base
- Inspect the vent tube kit for two silicone sealing bands.
- Attach the outer 6" main tube to the vent terminal base.
- Drill a 1/8" diameter hole through the tube and the base collar.
- Secure with a supplied #8 sheet metal screw. Repeat for a second hole approximately 180° from the first.
Attaching the 6" (15.2 cm) Diameter Main Tube
- From outside, insert the 6" vent tube/base assembly through the exterior wall hole and onto the 6" elbow. Slide as needed.
An improper seal can cause product performance and nuisance pilot outages.
Securing Vent Cap / Base Assembly to the Exterior Wall
- Place the 3" main tube onto the vent cap collar and seat the cap against the base.
- Secure the assembly to the exterior wall with four screw anchors appropriate for the wall type. The 6" tube should be essentially level, though a slight upward pitch is acceptable.
- Caulk the junctions of the vent terminal base and exterior wall with silicone sealant (not supplied).
An improper seal can cause product performance and nuisance pilot outages.
Final Assembly and Sealing of the Vent System
- Position and fasten the finishing collar against the wall to close the opening around the tube.
- Ensure the 6" inner sliding air tube is fully engaged onto the 6" elbow.
- Drill two 1/8" holes (180° apart) in the junction of the two 6" tube joints.
- Fasten with four supplied #8 sheet metal screws.
- Using a flat head screwdriver, roll the silicone band over the seam to seal.
- Seal all 6" tube joints with provided silicone bands. Seal the elbow joint to the plenum with silicone sealant. Improper seals can cause product performance and nuisance pilot outages.
Typical Installation
Diagram Description: Illustrates the assembled water heater with vent system, showing connections for air tube, vent terminal cap, hot water outlet, T&P relief valve, manual gas shut-off, sediment trap, gas control (thermostat), and connections to cold water supply, expansion tank, and drain valve. It also shows the vent terminal base and air gap.
Notice: The National Fuel Gas Code (NFGC) mandates a manual gas shut-off valve. Local codes may vary and take precedence.
Thermal Expansion
A check valve in the cold water inlet line (or part of a pressure reducing valve, meter, or softener) creates a "closed water system." In an "open" system (no check valve), expanding water flows back to the city main.
In a "closed" system, expanding water cannot return to the main, causing a rapid and dangerous pressure increase. This can lead to frequent relief valve operation and premature failure of the valve or heater. Replacing the relief valve will not fix the underlying issue.
The suggested solution is to install an expansion tank in the cold water line between the water heater and the check valve. The tank's air cushion compresses to relieve overpressure.
Notice: Do not apply heat to HOT or COLD water connections. Sweat tubing to the adapter before fitting it to the heater connections. Heat can damage the dip tube, nipples, and heat traps.
Water Supply Connections
Refer to the typical installation illustration (page 12). Unions or flexible copper connectors are recommended for easy disconnection for servicing. HOT and COLD water connections are 3/4" NPT.
Install a shut-off valve in the cold water line near the heater.
A combination temperature and pressure relief valve (ANSI Z21.22) is supplied and must be installed in the designated opening. No valve should be installed between the relief valve and the tank. Local codes govern relief valve installation.
Relief Valve
The relief valve pressure rating must not exceed 150 PSI (1034 kPa), and its Btuh rating must equal or exceed the water heater's Btuh input.
Position the relief valve outlet above a suitable open drain to prevent water damage. Use piping approved for hot water distribution.
The discharge line must be no smaller than the valve outlet and must pitch downward for gravity drainage. The line end should not be threaded or concealed and must be protected from freezing. Do not install valves, restrictions, or reducer couplings in the discharge line.
Installing the Water Heater
To Fill the Water Heater
- Ensure the drain valve is closed.
- Open the cold water supply shut-off valve.
- Open hot water faucets slowly to vent air from the heater and piping.
A steady flow of water from hot water faucets indicates a full heater.
Notice: Additional information is available at www.rheem.com under "Support" > "Technical Service" > "Bulletins 1400 Series" > Bulletin #1402.
Condensation
Condensation may form on the tank when first filled or during heavy water draws with cold inlet water. Drops falling on the burner may cause sizzling or pinging sounds. This is normal and usually disappears as the water heats up. If it persists, check piping and fittings for leaks.
Gas Supply
WARNING: Do not convert the water heater for use with a different gas type than shown on the rating plate; this can cause hazardous conditions.
The gas supply line should be 1/2" black steel pipe or approved gas piping.
Install a ground joint union or a certified semi-rigid/flexible gas appliance connector near the heater.
A manual gas shut-off valve should be installed at least 5 ft. (1.5 m) above the floor and be readily accessible.
Use pipe joint compound sparingly on male threads, ensuring it is resistant to LP gas action.
Install a sediment trap at the bottom of the gas line.
Do not overtighten pipe joints (max 31.5 ft-lbs / 42.7 Nm) at the gas control inlet, as this can damage the valve body.
Inlet gas pressure must not exceed 10.5" w.c. (2.65 kPa) for natural gas or 14" w.c. (3.5 kPa) for LP gas. Check the rating plate for minimum inlet pressure. Contact your gas supplier for pressure issues.
Flexible connectors must not exceed 36" (91 cm) in length.
Lever type gas shut-offs must be T-Handle type.
WARNING: Never use an open flame to test for gas leaks; it can cause property damage, personal injury, or death.
Leak Testing
Test the water heater and gas connections at normal operating pressures before use.
- Turn on the manual gas shut-off valve.
- Use a soapy water solution to test all connections and fittings for leaks. Bubbles indicate a leak that must be corrected.
Factory connections to the gas control should also be leak tested after the heater is in operation.
Pressure Testing the Gas Supply System
Disconnect the water heater and its shut-off valve from the gas supply piping system during pressure testing at pressures exceeding 1/2 psi (14" w.c.).
Isolate the water heater by closing the manual gas shut-off valve during pressure testing at pressures equal to or less than 1/2 psi (14" w.c.).
High Altitude
Appliance ratings are based on sea level. This water heater is suitable for high altitudes. Refer to the altitude label for maximum allowable altitude. Contact your local distributor for a high altitude model if needed.
WARNING: Failure to install a water heater suitable for the altitude can result in improper operation, property damage, and carbon monoxide production, leading to personal injury or death.
Insulation Blankets
WARNING: If local codes require external insulation blankets, follow the manufacturer's instructions included with the kit.
External insulation blankets are not necessary for this water heater as it meets or exceeds energy conservation standards for standby loss. The warranty does not cover damage from unauthorized energy-saving devices.
CAUTION: If applying an external insulation blanket:
- Do not cover operating or warning labels.
- Do not apply insulation to the top of the water heater, as this interferes with safe operation and venting.
- Do not cover the burner access door, jacket door, gas control, or relief valve.
Installing the Water Heater
Hot and Cold Pipe Insulation Installation
For increased energy efficiency, some units include two 24" (60.9 cm) sections of pipe insulation. Install as shown in the illustrations.
Notice: Do not apply heat to water connections. Heat can damage internal components.
Heat Trap
For increased energy efficiency, some units have factory-installed 3/4" NPT heat traps in the hot outlet and cold inlet lines.
During Installation of this Water Heater...
- DO: Check inlet gas pressure, provide adequate air for combustion/ventilation, maintain proper clearances, ensure venting system compliance, and contact a qualified technician if the pilot or main burner won't stay lit.
- DON'T: Block or restrict the vent terminal, remove the Burner Access Door unless necessary (requires new gasket), install where standing water may occur, or operate if the sight glass or burner access door grommet is damaged.
Installation Checklist
A. Water Heater Location
- Close to outside wall.
- Indoors and protected from freezing temperatures.
- Proper clearance from combustible surfaces observed; not installed on carpeted floor.
- Sufficient fresh air supply for proper operation.
- Air supply free of corrosive elements and flammable vapors.
- Provisions made to protect area from water damage.
- Sufficient room to service heater.
- Combustible materials clear of heater base.
B. Water Supply
- Water heater completely filled with water.
- Air purged from heater and piping.
- Water connections tight and leak-free.
C. Gas Supply
- Gas line equipped with shut-off valve, union, and sediment trap.
- Approved pipe joint compound used.
- Soap and water solution used for leak testing.
- Gas Company inspected installation (if required).
D. Relief Valve
- Temperature and Pressure Relief Valve properly installed; discharge line run to open drain.
- Discharge line protected from freezing.
E. Venting
- Flue baffle properly hung in top of heater's flue.
- Air tube and vent tube properly installed.
- Vent terminal, air tube sealed with silicone bands and sealants.
- Air tube securely fastened with screws.
Supplemental Instructions for Gas Water Heaters in Potable/Space Heating Applications
Local codes or plumbing authority requirements may vary and take precedence.
Diagram Description: Illustrates piping for combination potable and space heating. Shows hot water supply to house and heating unit, tee fittings for vertical/horizontal lines, mixing/tempering valve, check valves, shut-off valves, expansion tank, pump, and connections to a heating coil and air handler. It emphasizes purging air and using appropriate materials.
DANGER: If space heating requires temperatures above 125°F (52°C), install a mixing or tempering valve to reduce scald hazard.
DANGER: All piping and components must be suitable for drinking water.
DANGER: Do not connect to heating systems previously used with non-drinking water systems, as toxic chemicals (e.g., boiler treatment) may contaminate the drinking water supply.
Notice: Maximum distance from water heater to fan coil is 50' (15.2 m) in Massachusetts.
Lighting the Water Heater
Read and follow all instructions on the label and in this manual before operating. Failure to do so can result in unsafe operation, property damage, personal injury, or death. Seek help from a qualified person if instructions are unclear.
For Your Safety Read Before Operating
WARNING: Failure to follow instructions may cause fire or explosion, resulting in property damage, personal injury, or loss of life.
- This appliance uses a piezo-electric spark ignition system. Do NOT open the inner door to light the pilot by hand.
- Before Lighting: Smell for gas around the appliance, especially near the floor, as gas is heavier than air.
- What to do if you smell gas: Do not light appliances, touch switches, or use phones. Immediately call your gas supplier from a neighbor's phone. If unavailable, call the fire department. Do not re-enter the building until authorized.
- Use only your hand to turn the gas control knob. Do not use tools. If the knob is stiff, call a qualified service technician; forcing it may cause fire or explosion.
- Do not use the appliance if any part has been under water. Call a qualified installer or service agency for replacement; do not attempt repair.
Lighting Instruction
- STOP! Read safety information.
- Set thermostat dial to "PILOT LIGHTING" by turning clockwise until it stops.
- Slightly depress the gas control knob and turn clockwise to "OFF". (Note: Knob must be pushed down slightly to turn from "PILOT" to "OFF". Do not force.)
- Wait five (5) minutes to clear any gas. If gas is smelled, STOP and follow safety instructions.
- Remove the outer door only. Do not remove the inner door.
- Locate the piezo-electric spark generator on the combination gas control.
- Turn the gas control knob counter-clockwise to the "PILOT" position.
- Depress and hold the gas control knob fully down. Repeatedly depress the piezo-electric spark generator button until the pilot lights. The pilot flame is visible through the sight glass on the inner door.
- Continue holding the knob down for about one (1) minute after the pilot is lit. If it goes out, repeat steps 3-9.
- If the knob does not pop up when released, stop and call your service technician or gas supplier.
- If the pilot will not stay lit after several tries, turn the knob clockwise to "OFF" and call your service technician or gas supplier.
- Replace the outer door.
- Turn the gas control knob counter-clockwise to the "ON" position.
- Set the thermostat dial to the desired setting. The recommended starting point is indicated by the reference mark on the dial.
To Turn Gas Off to the Appliance
- Set the thermostat dial to the lowest setting "PILOT LIGHTING" by turning clockwise until it stops.
- Slightly depress the gas control knob and turn clockwise to "OFF POSITION".
Operating the Water Heater
CAUTION: Hydrogen gas can be produced in a hot water system unused for a period (two weeks or more). Hydrogen gas is extremely flammable. To dissipate it, open a hot water faucet for several minutes before using electrical appliances connected to the system. Unusual sounds like escaping air may indicate hydrogen presence. Do not smoke or use open flames near the faucet.
Safety Precautions
- Turn off the manual gas shut-off valve if the heater has been subjected to overheating, fire, flood, physical damage, or if the gas supply fails to shut off.
- Do not turn on the water heater unless it is completely filled with water.
- Do not turn on the water heater if the cold water supply shut-off valve is closed.
- Do not allow combustible materials (newspaper, rags, mops) to accumulate near the heater.
- Do not store or use gasoline or other flammable vapors/liquids (adhesives, paint thinner) near the heater or other appliances. If necessary, open doors/windows for ventilation and shut off all gas appliances, including pilot burners, to prevent vapor ignition.
- Notice: Flammable vapors can be drawn to the heater by air currents.
- If you have difficulty understanding operating or cleaning instructions, have a qualified person perform the work.
DANGER: Hotter water increases the risk of scalds. Households with children, disabled, or elderly persons may need a 120°F (49°C) or lower setting.
Water Temperature Setting
The water temperature is regulated by the dial on the gas control (thermostat).
Consider safety and energy conservation when setting the temperature. Lower settings save energy and operating costs.
The factory setting is the lowest setting, recommended at 120°F (49°C).
Water temperatures above 125°F (52°C) can cause severe burns or death from scalding. Follow manual and label warnings.
Mixing valves can reduce point-of-use temperature. Consult a plumber or local authority.
Time/Temperature Relationship in Scalds
| Water Temperature | Time To Produce a Serious Burn |
|---|---|
| 120°F (49°C) | More than 5 minutes |
| 125°F (52°C) | 1½ to 2 minutes |
| 130°F (54°C) | About 30 seconds |
| 135°F (57°C) | About 10 seconds |
| 140°F (60°C) | Less than 5 seconds |
| 145°F (63°C) | Less than 3 seconds |
| 150°F (66°C) | About 1½ seconds |
| 155°F (68°C) | About 1 second |
Table courtesy of Shriners Burn Institute
Maximum temperatures occur just after burner shut-off. To check temperature, turn on a hot water faucet and use a thermometer.
The reference mark 'p' on the dial indicates approx. 120°F (49°C); mark 'A' indicates approx. 130°F (54°C). Each mark above/below represents approx. 10°F (5.5°C) change.
Illustration Description: A diagram of the gas control dial showing temperature settings from 80°F (27°C) to 160°F (71°C), with reference marks for 120°F and 130°F.
Stacking/Layering: Can occur with frequent short draws. Hottest water is at the top of the tank. This can make the top layer hotter than indicated by the thermostat.
Always test water temperature with your hand before use. Supervise children and incapacitated individuals.
The gas control has safety shut-off devices for pilot flame loss and overheating.
WARNING: If overheating occurs or the gas supply fails to shut off, turn off the manual gas control valve. If the heater has been subjected to fire, flood, or damage, turn off the valve and do not operate until checked by qualified personnel.
Notice: Replace any part of the gas control system that has been submerged in water.
CAUTION: Risk of scalding increases with hotter water.
Care and Cleaning of the Water Heater
Draining the Water Heater
CAUTION: Shut off gas to the heater at the gas cock or manual shut-off valve before draining.
DANGER: Before operating the relief valve, ensure no one is exposed to hot water. Drained water may be hot enough to scald. Direct to a suitable drain.
- Turn off the cold water supply.
- Open a hot water faucet or lift the relief valve handle to admit air.
- Attach a garden hose to the drain valve and direct it to a drain. Open the valve.
Routine Preventative Maintenance
Proper maintenance ensures dependable service. Periodic inspection of the gas control, burner, relief valve, internal flue-way, and venting system by qualified personnel is recommended.
Establish and follow a routine maintenance program.
Annually, lift and release the relief valve lever to ensure it operates freely. Allow several gallons to flush through the discharge line.
Notice: If the relief valve discharges periodically, it may be due to thermal expansion in a closed system. Contact your water supplier or plumber. Do not plug the relief valve outlet.
The tank can accumulate solids, which may cause the gas control sensors to read inaccurately, leading to hotter fixture water than indicated. Drain a few quarts (liters) monthly to clean the tank.
Rapid closing of faucets or appliances can cause pipe banging. Water hammer arrestors can help.
Inspect the anode rod annually; replace if more than 6" (15.2 cm) of core wire is exposed. Ensure cold water supply is off before replacement.
Housekeeping
Vacuum dust, dirt, and lint from around the heater base regularly. Inspect and relight the pilot burner if necessary.
Maintain proper clearances for ventilation and combustion air supply.
Closet Installation: Do not block combustion air inlet openings. Maintain at least 1" (2.5 cm) clearance between openings and obstructions.
Venting System Inspection
Annually inspect the internal flue, vent, and air pipes for cleanliness. Inspect the gas venting system and termination cap. Ensure the vent system, vent, and air pipes are properly sealed and attached.
If soot or deterioration is found, contact the local gas utility to correct the problem, clean the flue/venting system, or replace the flue baffle before resuming operation.
Burner Inspection
Visually inspect pilot and main burners annually. Check the pilot flame through the sight glass with the main burner off, and inspect the main burner while firing.
If unusual burner operation occurs, shut off the heater until qualified service assistance is obtained.
CAUTION: Burner cleaning must be done by qualified service personnel only. The burner chamber is sealed. If the access door is removed, the gasket must be replaced.
For cleaning, remove the burner. A vacuum cleaner can be used on the burner and floor shield. The burner can also be scrubbed with mild detergent.
Notice: Refer to Hydrogen Gas Caution in Operating Instructions.
Vacation and Extended Shut-Down
For extended idle periods, turn off power and water to conserve energy and prevent hydrogen gas buildup. Drain the heater and piping if freezing is possible.
After a long shut-down, have operations and controls checked by qualified personnel. Ensure the heater is completely filled before restarting.
Notice: Do not remove the anode rod except for inspection/replacement, as this will shorten the glass-lined tank's life and void the warranty.
Anode Rod
The anode rod prolongs the life of the glass-lined tank by corroding instead of the tank. Water with high sulfate/mineral content can produce a hydrogen sulfide (rotten egg) odor; chlorination of the water supply should minimize this.
Before You Call For Service...
Save time and money by reviewing these troubleshooting tips first.
Troubleshooting Tips
| Problem | Possible Causes | What To Do |
|---|---|---|
| Condensation | New water heater fill. Moisture from combustion condensing on tank. Undersized heater. | Normal; should disappear as water heats. If persists, check piping for leaks. Excessive condensation can cause pilot outage. Use properly sized heater. Contact technician. |
| Yellow flame or soot | Scale on burner. Restricted flue/air inlet. Insufficient combustion/ventilation air. | Contact technician to remove scale. Remove obstructions from flue/air inlets. Ensure adequate air supply (see Installation section). |
| Unable to light pilot burner | Air in gas line. Clogged pilot orifice. Pinched/clogged pilot tube. Incorrect gas cock knob position. | Contact technician to purge air. Clean/replace pilot burner. See Lighting Instructions. Tighten connection at gas control. |
| Pilot burner does not stay lit | Loose thermocouple. Defective thermocouple. Safety magnet defective. Gas Control single-use shut-off opened. Improper vent assembly/installation. | Tighten thermocouple connection. Replace thermocouple. Replace gas control. Contact technician for service. |
CAUTION: Do not attempt repair of gas piping, gas control, burners, vent connectors, or safety devices. Refer repairs to qualified personnel.
Troubleshooting Tips (Continued)
| Problem | Possible Causes | What To Do |
|---|---|---|
| Rumbling noise | Scale and sediment in tank. | Clean tank. |
| Relief valve popping noise or draining | Pressure buildup from thermal expansion in a closed system. | This is unacceptable. Contact water supplier or plumber to correct. Do not plug relief valve outlet. |
| Not enough or no hot water | Water usage exceeded heater capacity. Low gas pressure. Pilot burner out. Gas control set too low. Leaking/open faucets. Cold inlet water in winter. | Wait for heater to recover. Check gas pressure. Check pilot burner; relight if necessary. Adjust gas control. Close faucets. Cold water takes longer to heat (normal). |
| Water is too hot | Gas control set too high. Gas Control defective. | Adjust gas control. Contact technician to replace gas control. |
CAUTION: Do not attempt repair of gas piping, gas control, burners, vent connectors, or safety devices. Refer repairs to qualified personnel.
Replacement Parts
Instructions For Placing a Parts Order
Address orders to the distributor or store where the heater was purchased. Include:
- Model and serial number from the rating plate.
- Type of gas (natural or LP) as marked on the rating plate.
- Part description and number of parts desired.
CAUTION: For your safety, do not attempt repair of gas piping, gas control, burners, vent connectors, or other safety devices. Refer repairs to qualified service personnel.
Diagram Description: An exploded view diagram of the water heater showing major components such as the vent terminal cap, air tubes, flue baffle, dip tube, burner assembly (including burner, thermocouple, pilot supply tube, piezo ignitor wire, burner cone, orifice, grommet), gas control (thermostat), T&P relief valve, drain valve, inner door, and jacket door.
If You Need Service
1. For questions, adjustments, repairs, or maintenance, first contact your installer, plumbing contractor, or agreed-upon service agency. If they are unavailable, consult the telephone directory or local utility for qualified service assistance.
2. If your problem is not resolved, contact the Manufacturer's National Service Department:
In the United States:
2600 Gunter Park Drive
Montgomery, Alabama 36109-1413
Phone: 1-800-432-8373
When contacting the manufacturer, provide the following information:
- Model and serial number (from the rating plate).
- Address and physical location of the water heater.
- Name and address of installer and any service agency.
- Date of original installation and dates of any service work.
- Detailed description of the problem.
- List of people contacted regarding the problem, with dates.
