Rinnai Inverter Multi Split System Models

Important Safety Information

Read this manual and the SAFETY MANUAL carefully before installing or operating your new air conditioning unit. Save this manual for future reference.

Please check the applicable models, technical data, and manufacturer information from the "Operation Manual" included with the outdoor unit.

This appliance must be installed in accordance with:

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

This appliance must be installed, maintained, and removed only by an Authorised Person.

For continued safety, the appliance must be installed and maintained according to the manufacturer's instructions.

The design and specifications are subject to change without prior notice for product improvement. Consult the Dealer or manufacturer for details. Any updates to the manual will be uploaded to the service website; please check for the latest version.

Safety Precautions

Warning: This symbol indicates the possibility of personnel injury or loss of life.

Caution: This symbol indicates the possibility of property damage or serious consequences.

Warnings for Product Use

• If an abnormal situation arises (e.g., a burning smell), immediately turn off the unit and disconnect the power. Contact your dealer for instructions to avoid electric shock, fire, or injury.
• Do not insert fingers, rods, or other objects into the air inlet or outlet, as the fan may be rotating at high speeds, causing injury.
• Do not use flammable sprays like hair spray, lacquer, or paint near the unit, as this may cause fire or combustion.
• Do not operate the air conditioner near combustible gases, as emitted gas may collect and cause an explosion.
• Do not operate in wet rooms (e.g., bathrooms, laundry rooms), as water exposure can short-circuit electrical components.
• Do not expose your body directly to cool air for prolonged periods.
• Do not allow children to play with the air conditioner; they must be supervised at all times.
• If using with burners or other heating devices, ensure thorough ventilation to avoid oxygen deficiency.
• For specific environments like kitchens or server rooms, specially designed units are recommended.

Cleaning and Maintenance Warnings

• Turn off and disconnect the power before cleaning to prevent electrical shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not use combustible cleaning agents, as they can cause fire or deformation.

Cautions

• Turn off and disconnect the power if not using the unit for an extended period or during storms.
• Ensure water condensation can drain freely.
• Do not operate with wet hands to avoid electric shock.
• Use the device only for its intended purpose.
• Do not climb on or place objects on the outdoor unit.
• Avoid operating with doors or windows open for long periods, especially in high humidity.

Electrical Warnings

• Use only the specified power cord; replace damaged cords with manufacturer-approved parts.
• Keep the power plug clean to prevent fire or electric shock.
• Do not pull the power cord to unplug; grip the plug firmly.
• Do not modify the power supply cord length or use extension cords.
• Do not share the electrical outlet with other appliances.
• Ensure the product is properly earthed during installation.
• Follow all local and national wiring standards and the Installation Manual. Connect cables tightly.
• Ensure wiring is arranged correctly so the control board cover closes properly to prevent corrosion and overheating.
• For fixed wiring, use an all-pole disconnection device with at least 3mm clearances and a residual current device (RCD) not exceeding 30mA.

Fuse Specifications

The circuit board has a fuse for overcurrent protection. Specifications are printed on the board (e.g., T20A/250VAC for units <24000Btu/h, T30A/250VAC for units >24000Btu/h). For R32 or R290 refrigerant units, only blast-proof ceramic fuses are permitted.

Warnings for Product Installation

1. Installation must be performed by an authorized dealer or specialist to prevent water leakage, electrical shock, or fire.
2. Improper installation can cause water leakage, electrical shock, or fire.
3. Contact an authorized service technician for repair or maintenance. Installation must comply with national wiring regulations.
4. Use only included or specified parts; non-standard parts can cause leaks, shock, fire, or unit failure.
5. Install the unit in a firm location capable of supporting its weight to prevent injury or damage from drops.
6. Install drainage piping correctly to prevent water damage.
7. If the unit has an auxiliary electric heater, keep it at least 1 meter (3 feet) from combustible materials.
8. Do not install near potential combustible gas leaks.
9. Do not turn on power until all work is completed.
10. Consult experienced service technicians for moving or relocating the unit.
11. Refer to "indoor unit installation" and "outdoor unit installation" sections for support details.

Note on Fluorinated Gases

This unit contains fluorinated greenhouse gases. Refer to the unit label or Owner's Manual for gas type and amount. Installation, service, maintenance, and repair must be performed by a certified technician. Uninstallation and recycling also require a certified technician. Units with 5 tonnes or more of CO2 equivalent of fluorinated gases require leak checks every 24 months if a leak-detection system is installed. Record-keeping of checks is recommended.

Warning for Refrigerant (Including R32)

Certain refrigerants, including R32, require minimum room sizes for standard installations. Consult AS/NZS 60335.2.40 for safe minimum floor area if larger refrigerant charges are used.

Warning for Using R32 Refrigerant

For R32 refrigerant models, the appliance shall be installed, operated, and stored in a well-ventilated area with a floor area corresponding to specified room sizes. Do not install in unventilated spaces if the area is smaller than specified.

Disposal Guidelines

This appliance contains refrigerant and other hazardous materials. Dispose of it according to law, requiring special collection and treatment. Do not dispose of as household or unsorted municipal waste. Improper disposal endangers health and the environment, as hazardous substances may leak into groundwater.

Mandatory Inspection Prior to Installation

Report any damage or discrepancies to the Supplier immediately. Inspect the exterior for shipping damage upon receipt. Ensure the appliance is correctly labeled for gas and electrical supply. Damaged or incorrect appliances must not be installed or operated, as this may contravene local regulations. Rinnai disclaims liability for installation or operation of damaged appliances.

Technical Specifications

Multi Outdoor Unit

Wall Mounted Split System

Slim Ducted

Compact Cassette

Specifications

Note: For units with quick connectors, no more than two pipes can be connected, and the maximum length for each pipe is 7.5 meters.

When installing multiple indoor units with a single outdoor unit, ensure the refrigerant pipe length and drop height between indoor and outdoor units meet the requirements illustrated in the diagram. The diagram shows an outdoor unit connected to multiple indoor units, with dimensions for height difference (15m max) and pipe lengths (10m, 15m).

Accessories

Use all provided installation parts and accessories. Improper installation can lead to water leakage, electrical shock, fire, or equipment failure. Items not included must be purchased separately.

Included Accessories

Note on Pipe Size: Pipe size may vary. A transfer connector may be needed for different pipe sizes.

Optional Accessories

Two types of remote controls are available: wired and wireless. Select based on customer preference and requirements. Refer to catalogues and technical literature for guidance.

Connecting Pipe Assembly

Installation Instructions

Installation Summary

Installation Order:

1. Install the outdoor unit.
2. Connect the refrigerant pipes.
3. Connect the wires.
4. Evacuate the refrigeration system.
5. Perform a test run.

Installation Diagram

The diagram illustrates a typical multi-split system installation. It shows an outdoor unit connected to multiple indoor units (3, 4, or 5 head configurations indicated by lines). Key clearances are shown for indoor units (e.g., >12cm from walls, >30cm for air out, >200cm for air out, >60cm clearance).

Safety Precautions:

• Caution: To prevent wall damage, use a stud finder to locate studs.
• A minimum pipe run of 3 meters is required to minimize vibration and excessive noise.
• Ensure air circulation pathways (A, B, C) are free from obstructions.
• Illustrations are for demonstration purposes only; actual unit shapes may differ.
• Copper lines must be independently insulated.

Note: Installation must comply with local and national standards. Installation may vary by region.

Outdoor Unit Installation

Install the unit following local codes and regulations, which may differ by region.

Installation Instructions – Outdoor unit

Step 1: Select Installation Location

Choose an appropriate location based on the following standards:

• Meets all spatial requirements (clearances shown in diagram: 60cm above, 30cm left/right, 65cm front, 10cm from back wall).
• Good air circulation and ventilation.
• Firm and solid location that supports the unit without vibration.
• Noise from the unit will not disturb others.
• Protected from prolonged direct sunlight or rain.
• Measures taken to prevent ice buildup and coil damage if snowfall is anticipated.

Locations to Avoid (DO NOT install):

• Near obstacles blocking air inlets/outlets.
• Near public streets or crowded areas where noise may disturb others.
• Near animals or plants sensitive to hot air discharge.
• Near sources of combustible gas.
• In locations exposed to large amounts of dust.
• In locations exposed to excessive salty air.

Special Considerations for Extreme Weather

• Heavy Wind: Install unit so the air outlet fan is at a 90° angle to the wind direction. Consider a barrier if needed.
• Heavy Rain or Snow: Build a shelter above the unit, ensuring airflow is not obstructed.
• Salty Air (Seaside): Use a specially designed corrosion-resistant outdoor unit.

Step 2: Install Drain Joint (Heat pump unit only)

Install the drain joint at the bottom of the unit before anchoring.

• With Rubber Seal (Fig. A): Fit seal onto drain joint, insert into base pan hole, rotate 90° until it clicks, and connect drain hose extension.
• Without Rubber Seal (Fig. B): Insert drain joint into base pan hole until it clicks, and connect drain hose extension.

In Cold Climates: Ensure the drain hose is vertical for swift drainage. Slow drainage can cause freezing and flooding.

Step 3: Anchor Outdoor Unit

Anchor the unit to the ground or a wall-mounted bracket using M10 bolts. Prepare the installation base according to the unit's dimensions and mounting feet distances shown in the "Unit Mounting Dimensions" table.

The table provides dimensions (W x D x H) and mounting distances (A, B) for different outdoor unit sizes (7kW, 9/11kW).

Refrigerant Piping Connection

Notes On Drilling Hole In Wall

Drill a hole in the wall for refrigerant piping and signal cable. Determine hole location based on outdoor unit placement. Use a 65-mm core drill. Install a protective wall cuff to seal the hole edges.

Note: Avoid wires, plumbing, and sensitive components when drilling.

Connecting Pipe Sizes

For a 7.0kW Indoor Unit:

• Can only connect with an A system.
• Two 7.0kW indoor units can connect with A and B systems.

Connective Pipe Size (unit: mm):

Connection Instructions - Refrigerant Piping

Note: For quick-connect models, refer to the internal machine manual. Do not let foreign substances or gases enter the unit.

Cautions:

• The branching pipe must be horizontal (angle >10° may cause malfunction).
• DO NOT install the connecting pipe until both indoor and outdoor units are installed.
• Insulate both gas and liquid piping to prevent water leakage.

Step 1: Cut Pipes

• Measure the distance between indoor and outdoor units.
• Cut the pipe slightly longer than the measured distance using a pipe cutter.
• Ensure the pipe is cut at a perfect 90° angle. Avoid oblique, rough, or warped cuts.

DO NOT DEFORM PIPE WHILE CUTTING: Be careful not to damage or deform the pipe, as this reduces heating efficiency.

Step 2: Remove Burrs

Remove all burrs from the cut section using a reamer or deburring tool. Hold the pipe downward to prevent burrs from falling in.

Step 3: Flare Pipe Ends

Proper flaring is essential for an airtight seal.

• Seal pipe ends with PVC tape to prevent foreign material entry.
• Sheath the pipe with insulating material.
• Place flare nuts on both ends, ensuring correct orientation.
• Remove tape before flaring. Clamp flare form on the pipe end.
• Use the flaring tool to flare the pipe according to specified dimensions.
• Inspect the flared end for cracks and evenness.

Piping Extension Beyond Flare Form Table: Lists pipe gauge, tightening torque, flare dimension (min/max), and flare shape for various pipe sizes.

Step 4: Connect Pipes

• Connect copper pipes to the indoor unit first, then the outdoor unit (low-pressure pipe first, then high-pressure pipe).
• Apply a thin coat of refrigeration oil to flared ends.
• Align the center of the two pipes.
• Tighten flare nuts by hand, then use a spanner and torque wrench according to the table values.

Caution: Wrap insulation around piping to prevent burns/frostbite. Ensure proper connection; over-tightening can damage the flare, under-tightening can cause leaks.

Note on Minimum Bend Radius: Bend tubing carefully, not more than 90° or more than 3 times. Minimum bend radius is 10cm (3.9").

• After connecting pipes to the indoor unit, wrap power cable, signal cable, and piping together with binding tape.
• Note: DO NOT intertwine signal cable with other wires.
• Thread pipeline through the wall and connect to the outdoor unit.
• Insulate all piping, including outdoor unit valves.
• Open outdoor unit stop valves to start refrigerant flow.

Caution: Check for refrigerant leaks after installation. If a leak is found, ventilate the area immediately and evacuate the system.

Wiring

Before Performing Any Electrical Work, Read These Regulations

• All wiring must comply with local and national electrical codes and be installed by a licensed electrician.
• Make all electrical connections according to the Electrical Connection Diagram on unit panels.
• If a serious safety issue with power supply exists, stop work immediately and explain the issue.
• Power voltage should be within 90-110% of rated voltage.
• For fixed wiring, install a surge protector and main power switch.
• For fixed wiring, use a switch or circuit breaker with at least 3mm contact separation on all poles.
• Connect the unit to an individual branch circuit outlet only.
• Ensure the air conditioner is properly earthed.
• Connect all wires firmly; loose wiring can cause overheating and fire.
• Keep wires away from refrigerant tubing, compressor, or moving parts.
• If the unit has an auxiliary electric heater, install it at least 1 meter from combustible materials.
• Wait at least 10 minutes after turning off power before touching electrical components.
• Do not cross electrical wiring with signal wiring to prevent distortion and interference.
• The unit must connect to the main outlet; power supply impedance should ideally be 32 ohms.
• Do not connect other equipment to the same power circuit.
• Connect outdoor wires before indoor wires.

Warning

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

Note on Air Switch

• For units with maximum current > 16A, use an air switch or leakage protection switch (purchased separately).
• For units with maximum current < 16A, use a power cord with a plug (purchased separately).

Diagram shows basic wiring connections for outdoor and indoor units, including optional air switch.

Outdoor Unit Wiring

• Prepare Cable: Choose the correct cable size (e.g., H07RN-F) according to local codes and regulations.
• Cable Sizing Reference: A table provides minimum cross-sectional area for power and signal cables based on rated current.
• Choosing Cable Size: Determine size based on the unit's maximum current indicated on the nameplate.
• Strip cable ends, strip insulation, and crimp u-lugs.
• Follow the wiring diagram inside the electrical box cover for connections.

Diagrams (B & C) illustrate wiring configurations for different setups.

Outdoor Unit Wiring Diagram (3 Head models)

This diagram shows the detailed wiring connections for a 3-head model, including connections to the main board, auxiliary board, compressor, fan motor, sensors, valves, and power supply terminals (L, N, S) for indoor units A, B, and C. It indicates optional components with a specific symbol.

Outdoor Unit Wiring Diagram (4 Head models)

This diagram details the wiring for a 4-head model, showing connections to the IPM board, DR board, main board, compressor, DC fan, sensors, electronic expansion valves, and power supply terminals for indoor units A, B, C, and D. It also notes optional components and magnetic rings for EMC compliance.

Outdoor Unit Wiring Diagram (5 Head models)

This diagram illustrates the wiring for a 5-head model, similar to the 4-head diagram but including connections for indoor units A, B, C, D, and E. It also specifies connections for DC and AC fan motors and notes optional components.

Caution

• Follow guidelines for wiring: use a dedicated power circuit, check screw tightness on fittings, verify power source specifications and capacity, confirm voltage is within 90% of rated, check cable thickness, install earth leakage circuit breakers in wet areas.
• Voltage drops can cause issues like magnetic switch vibration, fuse blowing, and functional disturbances.
• Disconnection from power supply must be incorporated into fixed wiring with a minimum 3mm air gap contact separation.
• Disconnect all supply circuits before accessing terminals.

Note on EMC Regulations: Apply correct magnetic rings as per the wiring diagram to comply with CISPR 14-1:2005/A2:2011. Contact your distributor for information on purchasing magnetic rings.

Air Evacuation

Preparations and Precautions

Air and foreign matter in the refrigerant circuit can cause pressure rises, damaging the unit, reducing efficiency, and causing injury. Use a vacuum pump and manifold gauge to remove non-condensable gas and moisture.

Evacuation should be done 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.

Evacuation Instructions

Read vacuum pump and manifold gauge manuals before use.

Diagram shows manifold gauge connected to outdoor unit service port (low pressure valve) and vacuum pump.

• Connect manifold gauge charge hose to the outdoor unit's low pressure valve service port.
• Connect charge hose from manifold gauge to the vacuum pump.
• Open the Low Pressure side of the manifold gauge; keep High Pressure side closed.
• Turn on the vacuum pump to evacuate the system.
• Run vacuum for at least 15 minutes, or until the Compound Meter reads -76cmHG (-1x105Pa).
• Close the manifold gauge's Low Pressure valve and turn off the vacuum pump.
• Wait 5 minutes and check for pressure change. If no change, the system is sealed. If pressure changes, there may be a gas leak.
• Insert hexagonal wrench into the high pressure valve and open it 1/4 counterclockwise. Listen for gas, then close the valve after 5 seconds.
• Watch the Pressure Gauge for one minute; it should read slightly higher than atmospheric pressure.
• Remove the charge hose from the service port.
• Fully open both high pressure and low pressure valves using the hexagonal wrench.
• Open Valve Stems Gently: Turn wrench until it stops; do not force.
• Tighten valve caps by hand, then with a tool.
• If the outdoor unit uses all vacuum valves and the vacuum position is at the main valve, the system is not connected to the indoor unit. Tighten the valve with a screw nut. Check for leaks before operation.

Note On Adding Refrigerant

Caution: Refrigerant charging must occur after wiring, vacuuming, and leak testing. Do not exceed maximum allowable refrigerant quantity. Use only appropriate refrigerant. Open refrigerant containers slowly and wear protective gear. Do not mix refrigerants. For R32 models, ensure the area is safe from flammable materials.

Additional Refrigerant per Pipe Length:

Note: Standard pipe length is 10m. Remove additional refrigerant charge according to rated volume (5m piping) for market/government verification tests.

Safety and Leakage Check

• Electrical Safety Check:
• Insulated resistance must be > 2MΩ.
• Earthing work: Measure earthing resistance (should be < 4Ω).
• Electrical leakage check: Perform during test operation. Turn off immediately if leakage occurs.
• Gas Leak Check:
• Soap water method: Apply soap-water solution or detergent to connections. Bubbles indicate leaks.
• Leak detector: Use a leak detector.

Note: Illustrations for leakage check points (A, B, C, D, E) are examples; actual machine layout may differ.

Test Run

Before Test Run

Confirm the following before performing the test run:

• Indoor and outdoor units are properly installed.
• Piping and wiring are correctly connected.
• No obstacles near unit inlets/outlets.
• Refrigeration system has no leaks.
• Drainage system is unimpeded and draining correctly.
• Heating insulation is properly installed.
• Earthing wires are properly connected.
• Piping length and additional refrigerant capacity are recorded.
• Power voltage is correct for the air conditioner.

Caution

Failure to perform the test run may result in unit damage, property damage, or personal injury.

Test Run Instructions

1. Open both liquid and gas stop valves.
2. Turn on the main power switch and allow the unit to warm up.
3. Set the air conditioner to COOL mode.
4. For the Indoor Unit:
   • Ensure remote control and buttons work.
   • Ensure louvers move correctly via remote control.
   • Verify room temperature registration is accurate.
   • Check indicators on remote and indoor unit display.
   • Ensure manual buttons on the indoor unit work.
   • Check drainage system for smooth operation.
   • Ensure no vibration or abnormal noise during operation.
5. For the Outdoor Unit:
   • Check for refrigeration system leaks.
   • Ensure no vibration or abnormal noise.
   • Ensure unit noise, wind, and water do not disturb neighbors or pose a safety hazard.

Note: If malfunctions occur, refer to the Troubleshooting section of the Owner's Manual before contacting customer service.

Automatic Correction Function

Automatic Wiring/Piping Correction Function

Recent models feature automatic correction for wiring/piping errors. Press the "check switch" on the outdoor unit PCB board for 5 seconds until the LED displays "CE". The "CE" disappears after 5-10 minutes, indicating the error is corrected and connections are proper.

Diagram shows a PCB with a check switch and LED display, and examples of correct vs. incorrect wiring.

How To Activate This Function

1. Ensure outside temperature is above 5°C (function does not work below this temperature).
2. Check that the liquid and gas stop valves are open.
3. Turn on the breaker and wait at least 2 minutes.
4. Press the check switch on the outdoor PCB board; the LED display should show "CE".

Contacts

Rinnai Australia Pty Ltd

ABN: 74 005 138 769 | AU45204

Address: 100 Atlantic Drive, Keysborough, Victoria 3173

P.O. Box: 460, Braeside, Victoria 3195

Tel: (03) 92716625 | Fax: (03) 92716622

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 offers a Service and Spare Parts network. For service, call the National Help Line. Rinnai recommends annual servicing.

Rinnai reserves the right to change specifications or designs without notice due to continuous improvement.

Document ID: B065468