Rinnai PB Series Split Type Wall Mounted Air Conditioner Installation Manual

Introduction

This manual provides detailed instructions for the installation of Rinnai PB Series split type wall-mounted air conditioners. It covers all aspects from site selection and unit mounting to refrigerant piping, air evacuation, electrical connections, and final testing. Adherence to these instructions, along with local regulations and safety standards, is crucial for proper and safe operation.

Models Covered

This manual applies to the Rinnai PB Series Split Type Wall Mounted Air Conditioners, including the following model series:

• System Models: HSNRP26B, HSNRP35B, HSNRP50B, HSNRP60B, HSNRP70B, HSNRP80B
• Indoor Unit Models: HINRP26MB, HINRP35MB, HINRP50MB, HINRP60MB, HINRP70MB, HINRP80MB, HINRP20MB
• Outdoor Unit Models: HONRP26B, HONRP35B, HONRP50B, HONRP60B, HONRP70B, HONRP80B
• Refrigerant: R32

Warnings and Important Information

General Warnings

! READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and to ensure optimum performance. Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

• DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in personal injury or death.
• WARNINGS: Indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.
• CAUTIONS: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury or damage to the appliance. It may also be used to alert against unsafe practices.

Regulatory Compliance

This appliance shall be installed in accordance with:

• Manufacturer's Installation Instructions
• Current AS/NZS 3000, AS/NZS 5141, AS/NZS 5149
• Local Regulations and Municipal Building Codes including local OH&S requirements

The appliance must be installed, maintained, and removed ONLY by an Authorised Person. For continued safety, it must be installed and maintained according to the manufacturer's instructions.

This appliance uses R32 refrigerant.

! WARNING: This appliance is heavy; use 2 people or a mechanical lifting device. Improper lifting may result in serious injury.

Take care when opening or unpacking. Failure to do so may result in serious injury or product failure.

DO NOT modify the electrical wiring. If control power wiring is damaged, it must be replaced by an authorized person to avoid electric shock, fire, serious injury, or product failure.

DO NOT install on an unstable or non-level surface where it may fall, risking death, serious injury, or product failure.

DO NOT install the outdoor unit where noise may cause nuisance.

DO NOT install the outdoor unit where it will be exposed to sea wind (salt spray) as this will reduce durability.

Mandatory Inspection Prior to Installation

! IMPORTANT: Immediately report any damage or discrepancies to the Supplier. Inspect the exterior for evidence of rough handling. Ensure the appliance is labelled correctly for gas and electrical supply. Appliances that may be damaged or incorrect MUST NOT be installed or operated. Rinnai disclaims liability for installation or operation of damaged/incorrect appliances.

Installation Precautions

This appliance shall be installed in accordance with local electrical safety regulations by an authorized person (e.g., licensed electrician). Contact an authorized service technician for repair or maintenance.

Only use included accessories, parts, and specified parts. Non-standard parts can cause water leakage, electrical shock, fire, or unit failure.

Install in a firm location supporting the unit's weight. Improper installation may cause the unit to drop, leading to serious injury and damage.

DO NOT turn on power until all work is completed.

For moving or relocating, consult experienced service technicians.

For units with auxiliary electric heaters, DO NOT install within 1 meter (3 feet) of combustible materials.

DO NOT install in locations exposed to combustible gas leaks, as this may cause fire.

Install drainage piping correctly to prevent water damage.

This is a Type 1 Electrical Appliance. Ensure proper connection of live, neutral, and earth wires. Inadequate connections may cause fire or electric shock.

The yellow-green wire is for earthing only.

Circuit breakers must have magnetic tripping and heat tripping functions.

Use standard circuit breakers and fuses conforming to appliance ratings.

Ensure the unit is earthed according to local regulations.

Connect all wiring tightly. Loose wiring can lead to overheating, malfunction, or fire.

DO NOT supply power until all wiring and tubing are completed.

Select an accessible installation location for service and replacement.

Ensure tubing is properly insulated.

Install the drain hose properly for smooth drainage.

Check for and rectify refrigerant leaks after installation or repair.

This appliance uses R32 refrigerant, a flammable gas, and must be handled by a certified refrigeration mechanic.

Product Use Warnings

! WARNING: Risk of fire/flammable material. Leaked refrigerant with an ignition source can ignite.

Read OPERATING INSTRUCTIONS before use.

Service personnel must read OPERATING INSTRUCTIONS and INSTALLATION MANUAL.

Minimum room sizes are required for certain refrigerant levels. Consult AS/NZS 60335.2.40 for safe minimum floor area if using larger refrigerant charges.

Ensure adequate ventilation and no ignition sources before charging or releasing R32.

Refrigerant Charge and Floor Area

WARNINGS FOR PRODUCT USE:

• If an abnormal situation (e.g., burning smell) occurs, turn off the unit, disconnect power, and call your dealer.
• DO NOT insert fingers or objects into air inlet/outlet; this may cause injury due to the fan.
• DO NOT use flammable sprays (hair spray, lacquer, paint) near the unit; this may cause fire or combustion.
• DO NOT operate near combustible gases; emitted gas can cause explosion.
• DO NOT operate in wet rooms (bathroom, laundry); water can short-circuit electrical components.
• DO NOT expose body directly to cool air for prolonged periods.
• DO NOT allow children to play with the unit; supervise them at all times.
• When using with burners or other heating devices, ventilate the room to avoid oxygen deficiency.
• For specific environments (kitchens, server rooms), specially designed units are recommended.

Operation Warnings

• DO NOT run for extended periods with high humidity or open doors/windows, as this may lead to product failure.
• DO NOT cover or place articles on the appliance.
• DO NOT touch, operate, or clean with wet hands; this may cause electric shock or product failure.
• DO NOT insert hands or objects through air inlet/outlet while operating; this may cause electric shock or product failure.
• DO NOT place heaters or other heating appliances nearby without sufficient ventilation; this may cause product mis-operation.
• Turn main power off before cleaning to prevent fire, electric shock, or product failure.
• DO NOT use solvents, abrasives, or harsh detergents. Clean with a soft, damp cloth and mild detergent.
• NEVER touch metal parts when removing the air filter; this may cause electric shock or product failure.
• DO NOT leave flammable materials near the appliance; this may cause explosion or fire.
• If excessive noise, smell, or smoke occurs, turn off the unit, isolate power, and contact a service agent.
• DO NOT operate if submerged in water due to flooding; contact a service agent to avoid electric shock, fire, or injury.
• This appliance is not intended for use by persons with reduced physical, sensory, or mental capabilities, or lack of experience/knowledge, unless supervised.
• Children must be supervised to ensure they do not play with the appliance.
• The system is designed for consumer comfort, NOT for commercial applications requiring controlled atmospheres (e.g., computer rooms, food preservation).
• DO NOT block air inlet/outlet; this may cause product failure.
• DO NOT drink condensate water; it is not potable and may pose a health risk.
• DO NOT expose people, animals, or plants directly to cold/hot discharge; this may result in serious injury.
• DO NOT mix batteries (different types or new/used); this may result in product failure. STOP using the remote if there is a battery fluid leak.

Operation Range Limitations

The table below indicates the temperature ranges the air conditioner can be operated within:

Cleaning and Maintenance Warnings

• Turn off power before cleaning to prevent electric shock.
• DO NOT clean with excessive water.
• DO NOT use combustible cleaning agents; they can cause fire or deformation.

Operating Cautions

• Turn off and disconnect power if not using for a long time.
• Turn off and unplug during storms.
• Ensure water condensation can drain unhindered.
• DO NOT operate with wet hands; this may cause electric shock.
• DO NOT use for any purpose other than intended.
• DO NOT climb onto or place objects on the outdoor unit.
• DO NOT allow operation for long periods with doors/windows open or high humidity.

Electrical Warnings

• Only use the specified power cord. If damaged, it must be replaced by the manufacturer or qualified personnel.
• Keep power plug clean. Dirty plugs can cause fire or electric shock.
• DO NOT pull power cord to unplug; hold the plug firmly.
• DO NOT modify power supply cord length or use extension cords.
• DO NOT share electrical outlets with other appliances.
• Ensure the product is properly grounded during installation.
• Follow all local and national wiring standards and the Installation Manual. Connect cables tightly and clamp securely. Improper connections can overheat, cause fire, or shock.
• All wiring must be arranged to ensure the control board cover closes properly. Improper closure can lead to corrosion and fire/shock hazards.
• If connecting to fixed wiring, ensure an all-pole disconnection device with ≥3mm clearance, and a residual current device (RCD) with ≤30mA rated residual operating current are incorporated.

Fuse Specifications

The air conditioner's circuit board (PCB) has a fuse for overcurrent protection. Fuse specifications are printed on the circuit board (e.g., T3.15AL/250VAC). For R32 units, only blast-proof ceramic fuses can be used.

Fluorinated Gases

This unit contains fluorinated greenhouse gases. Refer to the appliance label or Operation Manual for details. Installation, service, maintenance, and repair must be performed by a certified technician. Uninstallation and recycling also require a certified technician. Units containing 5 to 50 tonnes of CO2 equivalent of these gases require leak checks at least every 24 months if a leak detection system is installed. Proper record-keeping is recommended.

Accessories

The air conditioning system includes the following accessories. Use all installation parts and accessories. Improper installation can lead to water leakage, electrical shock, fire, or equipment failure. Items not included must be purchased separately.

Connecting Pipe Assembly

Magnetic ring and belt: (if supplied) Refer to the wiring diagram to install it on the connective cable. [Description: A ring and belt used to secure cables.]

Installation Summary

The installation process involves several key steps:

1. Step 1: Select Installation Location: Choose an appropriate site based on circulation, drainage, noise, stability, and proximity to electrical devices. Avoid heat sources, flammable items, obstructions, doorways, and direct sunlight.
2. Step 2: Determine Wall Hole Position: Ensure adequate clearance from walls and ceiling. A minimum of 12cm from the left/right sides and top, and 15cm from the bottom is recommended. The wall hole should be at a slight downward angle (5-7mm) for drainage. [Diagram shows clearances.]
3. Step 3: Attach Mounting Plate: Secure the mounting plate to the wall using appropriate screws or anchors for the wall type. Ensure it is flat and level.
4. Step 4: Drill Wall Hole: Use a 65mm or 90mm core drill for the connective piping. Place a protective wall cuff in the hole.
5. Step 5: Prepare Refrigerant Piping: Prepare the piping by cutting and flaring it correctly. Ensure it exits the unit from the appropriate side, removing knock-out panels as needed.
6. Step 6: Connect Drain Hose: Attach the drain hose to the unit, ensuring it is on the same side as the piping exit. Wrap connections with Teflon tape and insulate indoor portions to prevent condensation. Test drainage by pouring water into the drain pan. Plug unused drain holes. [Diagrams show correct/incorrect drain hose placement.]
7. Step 7: Connect Signal and Power Cables: Prepare cables, ensuring correct size and stripping. Connect wires to the terminal block according to the wiring diagram. Secure cables with clamps.
8. Step 8: Wrap Piping and Cables: Bundle the drain hose, refrigerant pipes, and signal cable together using insulation tape. Ensure the drain hose is at the bottom of the bundle. Keep pipe ends unwrapped for leak testing.
9. Step 9: Mount Indoor Unit: Hook the indoor unit onto the mounting plate, ensuring it is firmly secured. Push down to snap it into place. The unit may have slight left/right adjustability for pipe connection. [Diagram shows unit adjustability.]

Description

The Rinnai PB Series Split Type Air Conditioner consists of an indoor unit and an outdoor unit connected by refrigerant piping, signal cables, and a drain hose. The system includes a wall mounting plate, front panel, louvers, functional filter (on some models), remote controller, and remote controller holder.

Diagram Description: The diagram shows the indoor unit with its components (Wall Mounting Plate, Front Panel, Power Cable, Louver, Functional Filter, Drainage Pipe, Signal Cable, Remote Controller) and the outdoor unit. It illustrates how the indoor and outdoor units are connected via piping and cables.

Indoor Installation

Prior to Installation

Verify the indoor and outdoor unit model numbers match. Choose an appropriate installation location based on the following standards:

• Good air circulation
• Convenient drainage
• Minimal noise disturbance to others
• Firm and solid mounting surface (no vibration)
• Strong enough to support the unit's weight
• At least 1 meter away from other electrical devices (TV, radio, computer)

DO NOT install in the following locations:

• Near heat, steam, or combustible gas sources
• Near flammable items (curtains, clothing)
• Where obstacles might block air circulation
• Near doorways
• In locations subject to direct sunlight

Wall Hole Considerations

If no fixed refrigerant piping exists, leave ample room for a wall hole for signal cable and refrigerant piping. The default piping exit is the right side of the indoor unit, but it can accommodate left or right exits. Ensure correct distance from walls and ceiling:

• Top: MUST be 15cm or more
• Left Side: MUST be 12cm or more
• Right Side: MUST be 12cm or more
• Bottom: Recommended 2.0m or more [Note: This measurement appears unusual for bottom clearance and is represented as per the source diagram.]

Step 2: Attach Mounting Plate

Remove the screw securing the mounting plate to the back of the indoor unit. Secure the mounting plate to the wall with the provided screws, ensuring it is flat against the wall.

For Concrete or Brick Walls: Drill 5mm-diameter holes, insert sleeve anchors, and secure the mounting plate by tightening screws into the clip anchors.

Step 3: Drill Wall Hole for Connective Piping

Determine the wall hole location based on the mounting plate position. Use a 65mm or 90mm core drill. Drill the hole at a slight downward angle (5-7mm) to ensure proper water drainage.

CAUTION: Avoid drilling into wires, plumbing, or other sensitive components.

Place a protective wall cuff in the hole to protect its edges and help seal it.

Mounting Plate Dimensions and Pipe Hole Clearances

Different models have slightly different mounting plates, but installation dimensions are consistent for the same indoor unit size. Diagrams show correct orientation of the mounting plate and specific pipe hole and wall clearance dimensions for various models:

• HINRP26MB/HINRP35MB: Pipe hole Ø 45mm. Clearances shown relative to bracket.
• HINRP50MB/HINRP60MB: Pipe hole Ø 65mm. Clearances shown relative to bracket.
• HINRP70MB/HINRP80MB: Pipe hole Ø 90mm. Clearances shown relative to bracket.

Step 4: Prepare Refrigerant Piping

The refrigerant piping is inside an insulating sleeve. Prepare it before passing through the wall hole.

• Choose the piping exit side based on the wall hole position relative to the mounting plate.
• If the wall hole is behind the unit, keep the knock-out panel in place. If to the side, remove the plastic knock-out panel to create a slot. Needle nose pliers may be needed.
• If existing piping is embedded, proceed to the drain hose connection. Otherwise, connect the indoor unit's piping to the connective piping.

NOTE ON PIPING ANGLE: Refrigerant piping can exit from the left-hand side, right-hand side, left rear, or right rear.

CAUTION: Be careful not to dent or damage the piping while bending it, as this affects performance.

Step 5: Connect Drain Hose

The drain hose is typically attached to the left-hand side of the unit (facing the back). Attach it on the same side as the refrigerant piping exit for proper drainage. Connect an extension hose if needed.

• Wrap the connection point with Teflon tape for a good seal.
• Wrap the indoor portion of the drain hose with foam pipe insulation to prevent condensation.
• Test drainage by pouring water into the drain pan.
• Plug the unused drain hole with the provided rubber plug to prevent leaks.

NOTE ON DRAIN HOSE PLACEMENT: Ensure the drain hose is not kinked or dented. Do not place the end of the hose in water or containers that collect water, as this prevents proper drainage. [Diagrams show correct/incorrect drain hose placement.]

Electrical Work Precautions

! BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE REGULATIONS:

1. All wiring must comply with local/national electrical codes and be installed by a licensed electrician.
2. Connections must follow the Electrical Connection Diagram on the unit panels.
3. If a serious safety issue arises with the power supply, stop work immediately and explain to the client. Refuse installation until the issue is resolved.
4. Supply voltage must meet data label requirements (220-240V). Insufficient supply can cause malfunction, shock, or fire.
5. For fixed wiring, install a surge protector and main power switch.
6. For fixed wiring, use a switch or circuit breaker with all-pole disconnection (≥3mm contact separation) installed by a qualified technician.
7. Connect the unit to an individual branch circuit outlet only.
8. Properly ground the air conditioner.
9. Ensure all wires are firmly connected. Loose wiring can lead to overheating, malfunction, or fire.
10. Do not let wires touch refrigerant tubing, the compressor, or moving parts.
11. If the unit has an auxiliary electric heater, install it at least 1 meter away from combustible materials.
12. To avoid electric shock, wait at least 10 minutes after turning off the power before touching electrical components.

WARNING: BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM.

Step 6: Connect Signal and Power Cables

The signal cable communicates between indoor and outdoor units. Choose the correct cable size based on the unit's maximum current (indicated on the nameplate) and local/national rules.

Cable Size Reference

WARNING: ALL WIRING MUST BE PERFORMED STRICTLY IN ACCORDANCE WITH THE WIRING DIAGRAM LOCATED ON THE BACK OF THE INDOOR UNIT'S FRONT PANEL.

Wiring Process:

1. Open the front panel and wire box cover of the indoor unit to access the terminal block.
2. Remove knock-out panels as needed for cable routing.
3. Unscrew and reposition the cable clamp.
4. Feed the signal wire through the appropriate slot.
5. Connect wires according to the indoor unit's wiring diagram, screwing u-lugs firmly to terminals.
6. CAUTION: DO NOT MIX UP LIVE AND NULL WIRES.
7. Fasten the signal cable to the unit using the cable clamp.
8. Replace the wire cover and plastic panel.

Step 7: Wrap Piping and Cables

Bundle the drain hose, refrigerant pipes, and signal cable together for space-saving, protection, and insulation. Use adhesive vinyl tape to attach the drain hose to the underside of the refrigerant pipes. Wrap the bundle tightly with insulation tape.

DRAIN HOSE MUST BE ON BOTTOM: Placing the drain hose at the top can cause drain pan overflow.

DO NOT INTERTWINE SIGNAL CABLE WITH OTHER WIRES.

DO NOT WRAP ENDS OF PIPING: Keep pipe ends unwrapped for leak testing.

Outdoor Installation

Step 1: Select Installation Location

Install according to local regulations and municipal building codes. Choose an appropriate location that meets the following standards:

• Meets all spatial requirements (see diagram for clearances).
• Good air circulation and ventilation.
• Firm and solid location that can support the unit without vibration.
• Noise from the unit will not disturb others.
• Protected from prolonged periods of direct sunlight or rain.
• If snowfall is anticipated, mount the unit high enough (minimum 46 cm) to prevent ice buildup on the base pad and coil.

DO NOT install in the following locations:

• Near obstacles blocking air inlets/outlets.
• Near public streets, crowded areas, or where noise will disturb others.
• Near animals or plants that could be harmed by hot air discharge.
• Near any source of combustible gas.
• In locations exposed to large amounts of dust.
• In locations exposed to excessive salty air (seaside).

Special Considerations for Extreme Weather

• Heavy Wind: Install the unit so the air outlet fan is at a 90° angle to the wind direction. Consider a barrier if winds are extremely heavy. [Diagrams show wind considerations.]
• Heavy Rain or Snow: Build a shelter above the unit, ensuring it does not obstruct airflow.
• Salty Air (Seaside): Use an outdoor unit specifically designed to resist corrosion.

Step 2: Install Drain Joint (Heat Pump Unit Only)

Install the drain joint at the bottom of the unit before bolting it in place. Two types of drain joints exist:

• With Rubber Seal (Fig. A): Fit the rubber seal onto the drain joint, insert into the base pan hole, and rotate 90° until it clicks. Connect a drain hose extension if needed for heating mode.
• Without Rubber Seal (Fig. B): Insert the drain joint into the base pan hole until it clicks. Connect a drain hose extension if needed.

IN COLD CLIMATES: Ensure the drain hose is as vertical as possible for swift drainage. Slow drainage can cause freezing and flooding.

Step 3: Anchor Outdoor Unit

The outdoor unit can be anchored to the ground or a wall-mounted bracket using M10 bolts. Prepare the installation base according to the dimensions below.

Unit Mounting Dimensions

The following table lists outdoor unit sizes and mounting hole pitch dimensions:

Ground/Platform Installation:

1. Mark positions for four expansion bolts based on the chart.
2. Pre-drill holes for expansion bolts.
3. Place a nut on each expansion bolt.
4. Hammer expansion bolts into holes.
5. Remove nuts, place unit on bolts.
6. Put washer on each expansion bolt, then replace nuts.
7. Tighten nuts until snug.

WARNING: EYE PROTECTION IS RECOMMENDED WHEN DRILLING INTO CONCRETE.

Wall-Mounted Bracket Installation:

CAUTION: Ensure the wall is solid brick, concrete, or similar strong material, capable of supporting at least four times the unit's weight.

1. Mark bracket hole positions based on the chart.
2. Pre-drill holes for expansion bolts.
3. Place washer and nut on each expansion bolt.
4. Thread expansion bolts through mounting brackets, position brackets, and hammer bolts into the wall.
5. Check that mounting brackets are level.
6. Carefully lift the unit and place its mounting feet on the brackets.
7. Bolt the unit firmly to the brackets.
8. If allowed, install with rubber gaskets to reduce vibration and noise.

Step 4: Connect Signal and Power Cables

The outdoor unit's terminal block is protected by a wiring cover. A wiring diagram is inside the cover.

WARNING: BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM.

Cable Preparation:

• Choose the right cable size based on the unit's maximum current and local/national rules.
• Strip rubber jacket and insulation from cable ends.
• Crimp u-lugs onto wire ends.

PAY ATTENTION TO LIVE WIRE: Clearly distinguish the Live ("L") Wire.

WARNING: ALL WIRING MUST BE PERFORMED STRICTLY IN ACCORDANCE WITH THE WIRING DIAGRAM LOCATED INSIDE OF THE WIRE COVER OF THE OUTDOOR UNIT.

Connection Procedure:

1. Unscrew and remove the electrical wiring cover.
2. Unscrew and reposition the cable clamp.
3. Connect wires according to the wiring diagram, screwing u-lugs firmly to terminals.
4. Loop wires to prevent rain water entry into the terminal.
5. Fasten the cable to the unit using the cable clamp.
6. Insulate unused wires with PVC electrical tape, ensuring they do not touch electrical or metal parts.
7. Replace the wire cover and screw it in place.

Cable Clamp Note: Select the appropriate through-hole according to the wire diameter. Use the buckle if the cable is not fastened tightly. [Diagram shows cable clamp options.]

Wiring of Terminal Block:

1. Remove the wire cover by loosening screws.
2. Dismount caps on the conduit panel.
3. Temporarily mount conduit tubes.
4. Connect power supply and low voltage lines to corresponding terminals.
5. Ground the unit per local codes.
6. Ensure wires are slightly longer than required.
7. Use lock nuts to secure conduit tubes.

Refrigerant Piping Connection

WARNING: Do not let substances or gases other than the specified refrigerant enter the unit. This can lower capacity, cause high pressure in the refrigeration cycle, and lead to explosion and injury.

Note on Pipe Length

Pipe length affects performance and energy efficiency. Nominal efficiency is tested with a 5-meter pipe length. A minimum run of 3 meters is required to minimize vibration and noise.

Maximum Length and Drop Height of Refrigerant Piping per Unit Model

Connection Instructions - Refrigerant Piping

Step 1: Cut pipes

Take care to cut and flare pipes properly for efficient operation and minimal maintenance.

1. Measure the distance between the indoor and outdoor units.
2. Cut the pipe slightly longer than the measured distance.
3. Ensure the pipe is cut at a perfect 90° angle. [Diagram shows correct 90° cut vs. oblique, rough, warped cuts.]

DO NOT DEFORM PIPE WHILE CUTTING: Care must be taken not to damage, dent, or deform the pipe, as this may adversely affect heating efficiency.

Step 2: Remove burrs

Burrs can affect the air-tight seal. Hold the pipe downward to prevent burrs from falling in. Use a reamer or deburring tool to remove all burrs from the cut section.

Step 3: Flare pipe ends

Proper flaring is essential for an airtight seal.

1. After removing burrs, seal pipe ends with PVC tape to prevent foreign material entry.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends, ensuring correct orientation as they cannot be changed after flaring.
4. Remove PVC tape before flaring.
5. Clamp the flare form onto the pipe end, ensuring the pipe extends beyond the edge according to the table dimensions.
6. Place the flaring tool onto the form and turn clockwise until fully flared.
7. Inspect the flared end for cracks and evenness.

Step 4: Connect pipes

Be careful not to use excessive torque or deform piping. Connect the low-pressure pipe first, then the high-pressure pipe.

MINIMUM BEND RADIUS: The minimum bending radius for refrigerant piping is 10cm.

Instructions for Connecting Piping to Indoor Unit

1. Align the center of the two pipes to be connected.
2. Tighten the flare nut by hand as tightly as possible.
3. Using a spanner, grip the nut on the unit tubing.
4. While gripping the unit tubing nut, use a torque wrench to tighten the flare nut according to the Torque Requirements table. Loosen slightly, then retighten.

Torque Requirements

DO NOT USE EXCESSIVE TORQUE: Excessive force can break the nut or damage the piping.

Instructions for Connecting Pipe to Outdoor Unit

1. Unscrew the valve cover on the side of the outdoor unit.
2. Remove protective caps from valve ends.
3. Align flared pipe end with each valve and tighten the flare nut by hand.
4. Using a spanner, grip the body of the valve, not the nut sealing the service valve.
5. While gripping the valve body, use a torque wrench to tighten the flare nut according to the correct torque values.
6. Loosen the flaring nut slightly, then tighten again.
7. Repeat steps 3-6 for the remaining pipe.

USE SPANNER TO GRIP MAIN BODY OF VALVE: Torque from tightening the flare nut can snap off other parts of the valve.

Air Evacuation

Preparations and Precautions

Air and foreign matter in the refrigerant circuit can cause abnormal pressure rises, damaging the unit, reducing efficiency, and causing injury. Use a vacuum pump and manifold gauge to evacuate the circuit, removing non-condensable gas and moisture. Evacuation is required upon initial installation and relocation.

Before Performing Evacuation

• Check that connective pipes between indoor and outdoor units are properly connected.
• Check that all wiring is connected properly.

Evacuation Instructions

1. Connect the charge hose of the manifold gauge to the outdoor unit's low pressure valve service port.
2. Connect another charge hose from the manifold gauge to the vacuum pump.
3. Open the Low Pressure side of the manifold gauge; keep the High Pressure side closed.
4. Turn on the vacuum pump to evacuate the system.
5. Run the vacuum for at least 15 minutes, or until the Compound Meter reads -76cmHG (-105Pa).
6. Close the Low Pressure side of the manifold gauge and turn off the vacuum pump.
7. Wait 5 minutes and check for any change in system pressure.
8. If system pressure changes, refer to Gas Leak Check. If no change, unscrew the high pressure valve cap. Insert a hexagonal wrench into the valve and open it 1/4 counterclockwise turn. Listen for gas exit for 5 seconds, then close the valve.
9. Watch the Pressure Gauge for one minute to ensure no pressure change. It should read slightly higher than atmospheric pressure.
10. Remove the charge hose from the service port.
11. Using a hexagonal wrench, fully open both high and low pressure valves.
12. Tighten valve caps on all three valves by hand (or with a torque wrench if needed).

OPEN VALVE STEMS GENTLY: Turn until the wrench hits the stopper; do not force further.

Note on Adding Refrigerant

Some systems require additional charging based on pipe lengths. The standard pipe length varies by local regulation; in other areas, it is 5m. Refrigerant is charged from the outdoor unit's low pressure valve service port. Additional refrigerant calculation is as follows:

Additional Refrigerant per Pipe Length

Electrical and Gas Leak Checks

Before Test Run

Perform test run only after completing these steps:

• Electrical Safety Checks: Confirm the unit's electrical system is safe and operating properly.
• Gas Leak Checks: Check all flare nut connections for leaks.
• Confirm gas and liquid (high/low pressure) valves are fully open.

Electrical Safety Checks

After installation, confirm all electrical wiring complies with local/national regulations and the Installation Manual.

Before Test Run: Grounding Work

Measure grounding resistance visually and with a tester. Resistance must be less than 0.1 Ω.

WARNING – RISK OF ELECTRIC SHOCK: ALL WIRING MUST COMPLY WITH LOCAL AND NATIONAL ELECTRICAL CODES, AND MUST BE INSTALLED BY A LICENSED ELECTRICIAN.

Gas Leak Checks

Two methods are available:

• Soap and Water Method: Apply soapy water or liquid detergent to all pipe connection points. Bubbles indicate a leak.
• Leak Detector Method: Refer to the device's operation manual.

AFTER PERFORMING GAS LEAK CHECKS: Replace the valve cover on the outdoor unit after confirming no leaks.

Check Points: [Diagram shows check points A, B, C, D.]

• A: Low pressure stop valve
• B: High pressure stop valve
• C & D: Indoor unit flare nuts

Test Run

Test Run Checks

Perform the Test Run for at least 30 minutes.

1. Connect power to the unit.
2. Turn the unit on using the remote controller's ON/OFF button.
3. Press the MODE button to cycle through functions:
• COOL – Select lowest possible temperature
• HEAT – Select highest possible temperature
4. Let each function run for 5 minutes and perform the following checks:

During operation, refrigerant pressure increases, potentially revealing leaks missed during initial checks. Double-check all refrigerant pipe connection points.

After a successful Test Run and all checks passed:

5. Return the unit to normal operating temperature using the remote control.
6. Wrap the indoor refrigerant pipe connections that were left uncovered during installation with insulation tape.

If Ambient Temperature is Below 17°C

DO NOT use the remote controller for the COOL function. Use the MANUAL CONTROL button instead.

1. Lift the indoor unit's front panel until it clicks.
2. Locate the MANUAL CONTROL button on the right side and press it twice to select COOL mode.
3. Perform Test Run as normal.

Checklist

FINAL CHECKLIST

IMPORTANT: The checklist is ONLY to be completed by an Authorised Person.

If you have answered no to any of the above, you must check and correct before appliance hand-over to customer.

Specifications

Detailed specifications for Rinnai PB Series Hi-Wall Split Systems are provided below, covering various models and their performance characteristics.

HSNRP26B / HSNRP35B Specifications

HSNRP50B / HSNRP60B Specifications

Capacities tested in accordance with AS/NZS 3823.2, with 5m interconnecting pipe length. Rinnai reserves the right to change specifications or designs without notice.

Contacts

Rinnai Australia Pty Ltd

ABN 74 005 138 769 | AU45204

100 Atlantic Drive, Keysborough, Victoria 3173
P.O. Box 460, Braeside, Victoria 3195
Tel: (03) 9271 6625
Fax: (03) 9271 6622

National Help Line
Tel: 1300 555 545*
Fax: 1300 555 655
Monday to Friday, 8.00 am to 5.00 pm EST.

*Cost of a local call may be higher from a mobile phone. (National calls from public phones in Australia are free.)

For further information visit www.rinnai.com.au or email enquiry@rinnai.com.au

Rinnai has a Service and Spare Parts network with personnel who are fully trained and equipped to give the best service on your Rinnai appliance. For service, call the National Help Line. Rinnai recommends annual servicing.

With our policy of continuous improvement, Rinnai reserves the right to change, or discontinue at any time, specifications or designs without notice.