Daikin R32 Split Series Installation Manual

1 About the documentation

This manual is written in English. Technical engineering data is available on the regional Daikin website and the Daikin Business Portal.

2 Specific installer safety instructions

WARNING: Installation must be performed by a qualified installer, complying with applicable legislation and standards like EN378 in Europe.

Installation Site: Ensure the site can support the unit's weight and provide adequate service space. Avoid contact with ceilings or walls to prevent vibrations.

Piping Installation: Use permanent joints for split systems in occupied spaces, except for site-made joints directly connecting to indoor units. For R32 refrigerant, site-made joints must be non-permanent type.

Refrigerant Charging: The refrigerant (R32) is mildly flammable. Take precautions against fire and harmful gas formation. Always use protective gloves and safety glasses when charging refrigerant. Never touch leaking refrigerant directly.

Electrical Installation: All wiring must be done by an authorized electrician, complying with national wiring regulations. Use multicore cable for power supply and ensure proper disconnection via an all-pole disconnection type breaker.

3 About the box

Ensure all accessories delivered with the unit are present, including the outdoor unit installation manual, general safety precautions, and fluorinated greenhouse gases labels.

4 Unit installation

4.1 Preparing the installation site

WARNING: The appliance must be stored in a well-ventilated room without ignition sources. Room size must comply with general safety precautions.

Installation site requirements: Mind spacing guidelines for walls facing 1, 2, or 3 sides. Ensure adequate clearance for air outlets and inlets. In cold climates, protect the unit from direct snowfall and ensure it is never snowed up. Provide sufficient space below the unit and above the maximum expected snow level.

4.2 Mounting the outdoor unit

Use vibration-proof rubber if vibrations may be transmitted to the building. The unit can be installed on a concrete veranda or solid surface with proper drainage. Prepare M8 or M10 anchor bolts, nuts, and washers.

5 Piping installation

5.1 Preparing refrigerant piping

Refrigerant piping requirements: Piping and joints must be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper. Foreign materials inside pipes must be ≤30 mg/10 m.

Refrigerant piping diameter: Specifications for Class 40 and Class 50 piping are provided.

Refrigerant piping insulation: Use polyethylene foam insulation with specific thermal conductivity and heat resistance.

5.1.3 Refrigerant piping length and height difference

Adhere to specified piping length and height difference requirements for optimal system performance.

5.2 Connecting the refrigerant piping

DANGER: RISK OF BURNING/SCALDING: No brazing or welding on site for units with R32 refrigerant charge during shipment. Site-made joints directly connecting to indoor units must be non-permanent type.

CAUTION: Do not connect the embedded branch piping and the outdoor unit without connecting the indoor unit.

5.2.1 Connections between outdoor and indoor unit using reducers: Details on connecting units with reducers are provided, including capacity classes and reducer types.

5.2.2 To connect the refrigerant piping to the outdoor unit: Keep field piping as short as possible. Apply refrigeration oil to both sides of the reducer and use appropriate tools for tightening flare nuts.

6 Charging refrigerant

6.1 About the refrigerant:

This product contains fluorinated greenhouse gases (R32). Do not vent gases into the atmosphere. The global warming potential (GWP) value is 675. Periodical inspections for refrigerant leaks may be required.

WARNING: Refrigerant is mildly flammable. Take precautions against fire and harmful gas formation.

5.3 Checking the refrigerant piping

5.3.1 To check for leaks: Do not exceed the unit's maximum working pressure. Use a recommended bubble test solution. Never use soap water.

Charge the system with nitrogen gas up to a specified pressure and check for leaks using a bubble test solution.

5.3.2 To perform vacuum drying:

DANGER: RISK OF EXPLOSION: Do not open stop valves before vacuum drying is finished.

Vacuum the system until the pressure reaches -0.1 MPa (-1 bar). Check for pressure increase to detect moisture. If moisture is present, vacuum for at least 2 hours and re-check pressure. If the target vacuum is not reached, check for leaks and perform vacuum drying again.

6.5 To fix the fluorinated greenhouse gases label:

Fill in the label with factory refrigerant charge, additional refrigerant amount, and total refrigerant charge in weight and CO2 equivalent. Use the GWP value mentioned on the label. Fix the label inside the outdoor unit near the stop valves.

6.6 To check refrigerant piping joints for leaks after charging refrigerant:

Perform a leakage test with a minimum sensitivity of 5 g/year. If a leak is detected, recover refrigerant, repair the joint, and repeat the test.

7 Electrical installation

WARNING: All wiring must be performed by an authorized electrician and comply with national wiring regulations. Use multicore cable for power supply and ensure proper disconnection.

7.1 Specifications of standard wiring components:

Details on power supply (voltage, frequency, current) and components (power supply cable, interconnection cable, circuit breaker) are provided.

7.2 To connect the electrical wiring to the outdoor unit:

Remove the switch box cover. Connect wires between indoor and outdoor units, matching terminal numbers and symbols. Ensure correct wiring for each room (A to A, B to B). Tighten terminal screws securely and check connections. Pass wiring through the cutout and ensure it does not contact gas piping.

8 Finishing the outdoor unit installation

8.1 To finish the outdoor unit installation:

DANGER: RISK OF ELECTROCUTION: Ensure the system is earthed properly. Turn off power before servicing. Install the switch box cover before turning on power.

Insulate and fix refrigerant piping and cables. Install the service cover.

9 Configuration

9.1 About ECONO mode prohibition setting:

This setting disables input control signals from user interfaces.

9.1.1 To turn ON ECONO mode prohibition setting:

Prerequisite: Main power supply must be turned off. Remove the top plate and electric box cover, then cut jumper J23.

9.2 About night quiet mode:

This function makes the outdoor unit run more quietly at nighttime, reducing cooling capacity. Explain this to the customer.

9.2.1 To turn ON the night quiet mode:

Prerequisite: Main power supply must be turned off. Remove top plate and electric box cover, then cut jumper J6.

9.3 About heat mode lock:

Heat mode lock limits the unit to heat operation. To set, remove the S99 connector.

10 Commissioning

10.1 Checklist before commissioning:

Verify unit mounting, earthing, power supply voltage, electrical connections, refrigerant piping insulation, stop valve status, and drainage.

10.2 Checklist during commissioning:

Perform wiring check, air purge, and test run.

10.3 Trial operation and testing:

Before test run, measure voltage at the primary side of the safety breaker. Ensure piping and wiring are correct and stop valves are open. Initialization may take several minutes.

10.3.1 To perform a test run:

Prerequisites: Power supply within specified range. Test run can be done in cooling or heating mode. Ensure all functions are working properly. Measure temperature difference at indoor unit inlet/outlet. Check individual and simultaneous unit operation.

11 Maintenance and service

NOTICE: Maintenance must be done by an authorized installer or service agent. Recommend performing maintenance at least once a year.

DANGER: RISK OF ELECTROCUTION: Disconnect power supply for at least 10 minutes before servicing. Measure voltage before touching components.

12 Disposal

NOTICE: Do not dismantle the system yourself. Treatment of refrigerant, oil, and other parts must comply with applicable legislation. Units must be treated at a specialized facility.

13 Technical data

13.1 Wiring diagram

The wiring diagram is delivered with the unit. A unified wiring diagram legend is provided, explaining various symbols and their meanings.

13.2 Piping diagram: Outdoor unit:

Component PED category classification for high pressure switches and compressors is provided. Other components refer to PED article 4, paragraph 3.