Daikin Split System Air Conditioners Installation Manual

About the Documentation

This document is part of a comprehensive documentation set. It includes general safety precautions and specific installer safety instructions. Always refer to the latest revisions available on the regional Daikin website or through your dealer. The original documentation is in English, and all other languages are translations.

Important Information:

• Ensure the user has the printed documentation for future reference.
• This appliance is intended for use by expert or trained users in various settings, including light industry, farms, commercial, and household environments.
• All installation, servicing, maintenance, and repair work must comply with applicable legislation and be performed by qualified persons.

About the Box

The package for the indoor unit contains various accessories. These include:

• Operation Manual
• General Safety Precautions
• Mounting Plate (attached to the unit)
• Titanium apatite deodorising filter
• Insulation piece
• Drain hose
• User Interface
• User Interface holder
• Dry battery AAA.LR03 (alkaline) for user interface
• Spare SSID sticker (attached to the unit)
• Screws for fixing drain hose
• White head screws

Note: The spare SSID sticker should be kept in a safe place for future use.

About the Unit

Warning: Mildly Flammable Material The refrigerant used in this unit is mildly flammable.

Wireless LAN:

• For detailed specifications and instructions, visit app.daikineurope.com.
• Precautions: Avoid use near medical equipment (e.g., pacemakers), automatic doors, fire alarm equipment, or microwave ovens, as this may cause interference or faulty behavior.
• Basic Parameters: The unit operates on IEEE 802.11b/g/n at a frequency range of 2400 MHz~2483.5 MHz.
• Setting the Wireless LAN: Requires a smartphone or tablet with a compatible OS, an internet connection, a communicating device (modem/router), a wireless LAN access point, and the Daikin Residential Controller application.

Unit Installation

Preparing the Installation Site:

• Warning: The appliance must be stored in a room without continuously operating ignition sources.
• Installation Site Requirements: The sound pressure level is less than 70 dBA. For specific models (CVXM-A and FVXM-A), when combined with certain outdoor units (3MXM40N8 or 3MXM52N8), the total liquid refrigerant piping length must not exceed 30 meters.
• Spacing: Ensure adequate spacing around the unit for proper operation and maintenance, as indicated in the diagrams (Front view and Side view).
• The unit should not be installed more than 60 mm above the floor.
• Wall Insulation: Additional insulation is required if wall conditions exceed 30°C and 80% relative humidity.
• Wall or Floor Strength: Ensure the wall or floor can support the unit's weight. Reinforce if necessary.

Opening the Indoor Unit:

• To remove the front panel: Slide the sliders in the direction of the arrows until they click.
• To remove the front grille: After removing the front panel, remove the 4 screws and pull the grille away from the tabs.
• To open the terminal block and remove the electrical wiring box cover: Follow the steps to remove the front grille, a lower screw, and the sensor securing plate, then slide the metal plate cover down and towards you.

Mounting the Indoor Unit:

There are three installation options:

• A: Floor (exposed) installation
• B: Wall (exposed) installation
• C: Half concealed installation

Detailed diagrams illustrate the mounting plate and screw hole locations for each type of installation. Follow the specific steps for drilling wall holes, securing the mounting plate, and attaching the unit using screws.

To drill a wall hole:

• Caution: Use a wall embedded pipe and wall cover for walls with metal frames or boards to prevent heat, electrical shock, or fire.
• Seal gaps around pipes with sealing material to prevent water leakage.
• Bore a 65 mm feed-through hole with a downward slope.
• Insert a wall embedded pipe and a wall cover.
• Seal any remaining gaps with putty after completing wiring and piping.

To remove the slit portions:

• Slit portions for side and bottom piping must be removed according to the piping direction. Cut the slit portions using nippers.

To provide drainage:

• Ensure condensation water can be evacuated properly.
• General Guidelines: Keep drain piping short. Use rigid polyvinyl chloride pipe (20 mm nominal diameter, 26 mm outer diameter). Install the drain hose with a downward slope. Traps are not permitted. Do not put the end of the hose in water.
• Connect the drain hose securely to the drain socket using a screw.
• Insulate the indoor drain socket and drain hose with at least 10 mm insulation material to prevent condensation.

Piping Installation

Preparing Refrigerant Piping:

• Piping and pressure-containing parts must be suitable for refrigerant and made of phosphoric acid deoxidised seamless copper.
• Information: Additional refrigerant charge is not allowed for certain combinations of outdoor and indoor units. The total piping length must be ≤30 m. Foreign materials inside pipes must be ≤30 mg/10 m.
• Refrigerant Piping Diameter: Use the same diameters as the connections on the outdoor units for liquid and gas piping.
• Refrigerant Piping Material: Phosphoric acid deoxidised seamless copper.
• Refrigerant Piping Insulation: Use polyethylene foam insulation with specific thermal conductivity and heat resistance. Insulation thickness varies based on pipe outer diameter. For high temperature and humidity, insulation thickness should be at least 20 mm.

Connecting the Refrigerant Piping:

• Danger: Risk of Burning/Scalding.
• Connect refrigerant piping using flare connections.
• Insulate all refrigerant piping to prevent condensation.
• Secure the piping and insulation with tape and insulation pieces.

Electrical Installation

Danger: Risk of Electrocution.

• Always use multicore cable for power supply cables.
• Use an all-pole disconnection type breaker with at least 3 mm contact gap for full disconnection.
• If the supply cord is damaged, it must be replaced by the manufacturer or a qualified service agent.
• Warning: Do NOT connect power supply to the indoor unit directly. Use only locally purchased electrical parts inside the product. Do not branch power supply for the drain pump from the terminal block. Keep interconnection wiring away from hot copper pipes.

Specifications of Standard Wiring Components:

• Interconnection cable (indoor-outdoor): 4-core cable, 1.5 mm²~2.5 mm², suitable for 220~240 V, H05RN-F (60245 IEC 57).

To connect the electrical wiring to the indoor unit:

• Open the terminal block. Strip wire ends.
• Match wire colours with terminal numbers and securely screw wires to terminals. Connect earth wires.
• Pull wires to ensure they are attached and secure them with the cable clamp. Ensure wires do not contact metal parts of the heat exchanger.
• For optional accessories, refer to section 7.3.

Finishing the Indoor Unit Installation

To finish the indoor unit installation:

• After drain piping, refrigerant piping, and electrical wiring are completed, wrap refrigerant pipes and interconnection cable with insulation tape, overlapping half the tape width.
• Pass pipes through the wall hole and seal gaps with putty.

To close the indoor unit:

• To close the electrical wiring box and close the terminal block: Hook the electrical wiring box, close it, and fix with a screw. Attach the front metal cover and close the sensor securing plate.
• To re-install the front grille: Attach the front grille, secure it in the tabs, and use the provided screws.
• To re-install the front panel: Insert the front panel into the grooves, attach the string, and slide the sliders until they click. Ensure the panel is securely fixed.

Commissioning

NOTICE: Always operate the unit with thermistors and/or pressure sensors/switches to prevent compressor damage.

To perform a test run:

• Prerequisites: Power supply must be within the specified range. Test run can be performed in cooling or heating mode. Refer to the operation manual for detailed functions.
• In cooling mode, select the lowest programmable temperature. In heating mode, select the highest.
• After the test run, set the temperature to a normal level (26-28°C for cooling, 20-24°C for heating).
• The system stops operating 3 minutes after being turned OFF.
• To perform a test run using the user interface: Press the ON/OFF button, then press the middle of the Mode and Temp buttons simultaneously. Press twice to choose the test run mode and confirm. The display will show '?'. Test run stops automatically after 30 minutes. Press ON/OFF to stop sooner.

Disposal

Notice: Do not dismantle the system yourself. Refrigerant, oil, and other parts must be treated according to applicable legislation by a specialized facility for reuse, recycling, and recovery.

Technical Data

A subset of the latest technical data is available on the regional Daikin website. The full set of data is accessible via the Daikin Business Portal (authentication required).

Unified Wiring Diagram Legend:

A table lists various symbols, their meanings, and associated colours used in wiring diagrams.

A comprehensive list of symbols and their corresponding meanings (e.g., Coil, Reactor, Motor types, Sensors, Switches, Relays, etc.) is provided for reference.