DAIKIN CTXF25F5V1B (01) PDF Document

When preparing the installation site for your DAIKIN CTXF25F5V1B, please adhere to the following requirements:

Air flow: Ensure nothing blocks the air flow.

Drainage: Make sure condensation water can be evacuated properly.

Wall insulation: If wall conditions exceed 30°C and 80% relative humidity, or if fresh air is inducted into the wall, additional insulation (minimum 10 mm thickness, polyethylene foam) is required.

Wall strength: Verify that the wall or floor is strong enough to support the unit’s weight. Reinforce the wall or floor if necessary.

Spacing: Install the unit at least 1.8 m from the floor and maintain the following minimum distances from walls and the ceiling:

▪ At least 50 mm from the ceiling.

▪ At least 30 mm from the left wall.

▪ At least 50 mm from the right wall.

The following accessories are supplied with your DAIKIN CTXF25F5V1B indoor unit:

• Installation manual (1x)
• Operation manual (1x)
• General safety precautions (1x)
• Spare SSID sticker (1x)
• Indoor unit fixing screw M4×12L (2x)
• Dry battery AAA.LR03 (alkaline) for user interface (2x)
• Holder for wireless remote control (1x)
• Wireless remote control (user interface) (1x)
• Mounting plate (1x)

Do NOT throw away the spare SSID sticker. Keep it in a safe place in case it is needed in the future.

To remove the front panel:

1. Hold the front panel by the panel tabs on both sides and open it.

2. Remove the front panel by sliding it to the left or the right and pulling it toward you. The front panel shaft on one side will disconnect.

3. Disconnect the front panel shaft on the other side in the same manner.

To remove the front grille:

1. Remove the front panel to access the air filter.

2. Remove 2 screws from the front grille.

3. Push down the 3 upper hooks marked with a symbol of 3 circles.

4. We recommend opening the flap before removing the front grille.

5. Place both hands under the center of the front grille, push it up and then toward you.

To remove the electrical wiring box cover:

1. Remove the front grille.

2. Remove 1 screw from the electrical wiring box.

3. Open the electrical wiring box cover by pulling the protruding part on the top of the cover.

4. Unhook the tab on the bottom and remove the electrical wiring box cover.

To open the service cover:

1. Remove 1 screw from the service cover.

2. Pull out the service cover horizontally away from the unit.

To re-install the front panel:

1. Attach the front panel. Align the shafts with the slots and push them all the way in.

2. Close the front panel slowly; press at both sides and at the center.

To re-install the front grille:

1. Install the front grille and firmly engage the 3 upper hooks.

2. Install 2 screws back on the front grille.

3. Install the air filter and then mount the front panel.

To install the mounting plate:

1. Install the mounting plate temporarily.

2. Level the mounting plate.

3. Mark the centers of the drilling points on the wall using a tape measure. Position the end of the tape measure at the “>” symbol.

4. Finish the installation by securing the mounting plate on the wall using M4×25L screws (field supply).

To drill a wall hole:

1. Bore a 65 mm large feed-through hole in the wall with a downward slope towards the outside.

2. Insert a wall embedded pipe into the hole.

3. Insert a wall cover into the wall pipe.

4. After completing wiring, refrigerant piping, and drain piping, seal the gap around the pipes with putty.

CAUTION: For walls containing a metal frame or a metal board, use a wall embedded pipe and wall cover in the feed-through hole to prevent possible heat, electrical shock, or fire.

Proper drainage setup is crucial to prevent water leaks. Follow these guidelines:

General Guidelines:

▪ Keep the drain piping as short as possible.

▪ If extending the drain hose, use a field-supplied hose with an inner diameter of 16 mm and use a heat insulation tube on the indoor section.

▪ Install the drain hose with a downward slope.

▪ Traps are NOT permitted.

▪ Do NOT put the end of the hose in water.

Connecting for right-side, right-back, or right-bottom piping (factory default):

1. Attach the drain hose with adhesive vinyl tape to the bottom of the refrigerant pipes.

2. Wrap the drain hose and the refrigerant pipes together using insulation tape.

Connecting for left-side, left-back, or left-bottom piping:

1. Remove the insulation fixing screw on the right side and remove the drain hose.

2. Remove the drain plug on the left side and attach it to the right side. Do NOT apply lubricating oil to the drain plug.

3. Insert the drain hose on the left side and tighten it with the fixing screw.

4. Attach the drain hose to the bottom side of the refrigerant piping using adhesive vinyl tape.

To check for water leaks:

1. Remove the air filters.

2. Gradually pour approximately 1 liter of water into the drain pan and check for leaks.

Use phosphoric acid deoxidised seamless copper for refrigerant piping. Foreign materials inside pipes must be ≤30 mg/10 m.

Pipe Outer Diameter:

Piping Temper Grade and Thickness:

Piping Insulation:

Use polyethylene foam as insulation material.

If the temperature is higher than 30°C and humidity is higher than RH 80%, the insulation thickness should be at least 20 mm.

1. Keep refrigerant piping as short as possible.

2. Connect the refrigerant piping to the unit using flare connections. Follow these guidelines:

▪ Coat the flare inner surface with ether oil or ester oil when connecting a flare nut. Tighten 3 or 4 turns by hand before tightening firmly.

▪ ALWAYS use 2 wrenches together when loosening a flare nut.

▪ ALWAYS use a spanner and torque wrench together to tighten the flare nut to prevent cracking and leaks.

3. Insulate the refrigerant piping, interconnection cable, and drain hose on the indoor unit together. Ensure all refrigerant piping is insulated to prevent condensation.

Tightening Torque and Flare Dimensions:

To check for leaks:

1. Charge the system with nitrogen gas up to a gauge pressure of at least 200 kPa (2 bar). It is recommended to pressurize to 3000 kPa (30 bar) or higher to detect small leaks.

2. Check for leaks by applying a recommended bubble test solution to all connections. NEVER use soap water.

3. Discharge all nitrogen gas.

To perform vacuum drying:

1. Vacuum the system until the pressure on the manifold indicates -0.1 MPa (-1 bar).

2. Leave as is for 4-5 minutes and check the pressure:

3. Vacuum the system for at least 2 hours to a manifold pressure of -0.1 MPa (-1 bar).

4. After turning the pump OFF, check the pressure for at least 1 hour.

5. If you do not reach the target vacuum or cannot maintain the vacuum for 1 hour, check for leaks again and then perform vacuum drying again.

Wiring Specifications:

Connection Procedure:

1. Set the indoor unit on the mounting plate hooks. Use the “Δ” marks as a guide.

2. Open the front panel, and then the service cover.

3. Pass the interconnection cable from the outdoor unit through the wall hole, through the back of the indoor unit, and through the front side.

4. Bend the end of the cable up.

5. Strip the wire ends approximately 15 mm.

6. Match wire colours with terminal numbers on the indoor unit terminal blocks and firmly screw the wires to the corresponding terminals.

7. Connect the earth wire to the corresponding terminal.

8. Firmly fix the wires with the terminal screws.

9. Pull the wires to make sure that they are securely attached, then retain the wires with the wire retainer.

10. Shape the wires so that the service cover fits securely, then close the service cover.

1. Insulate the piping and cable:

After the drain piping, refrigerant piping, and electrical wiring are finished, wrap them together with insulation tape. Overlap at least half the width of the tape with each turn.

2. Pass pipes through the wall hole:

Shape the refrigerant pipes along the pipe path marking on the mounting plate. Pass the drain hose and refrigerant piping through the wall hole and seal the gap with putty.

3. Fix the unit on the mounting plate:

1. Set the indoor unit on the mounting plate hooks using the “Δ” marks as a guide.

2. Press the bottom frame of the unit with both hands to set it on the bottom hooks of the mounting plate. Ensure wires are not squeezed.

3. Press the bottom edge of the indoor unit with both hands until it is firmly caught by the mounting plate hooks.

4. Secure the indoor unit to the mounting plate using 2 indoor unit fixing screws (M4×12L accessory).

If two indoor units are installed in one room, you can change the channel for one unit to avoid signal confusion. Perform this setting for only one of the units.

1. Remove the batteries from the user interface (remote control).

2. Cut the address jumper on the indoor unit’s PCB.

3. Turn the power supply on. The flap will open and close to set the reference position.

4. On the remote control, simultaneously press the TEMP ▲, TEMP ▼, and OFF buttons.

5. Press the TEMP ▲ or TEMP ▼ button.

6. Select the symbol ‘A’.

7. Press the FAN button.

8. Press the indoor unit ON/OFF switch while the operation lamp is blinking.

9. When the setting is complete, press OFF on the remote.

10. To return to the previous screen, keep the FAN button pressed for about 5 seconds.

After installation and before the first operation, verify the following items:

✓ The indoor and outdoor units are properly mounted.

✓ The air inlet and outlet of the unit are not obstructed.

✓ There are NO missing phases or reversed phases in the power supply.

✓ The refrigerant pipes (gas and liquid) are thermally insulated.

✓ Drainage flows smoothly.

✓ The system is properly earthed and the earth terminals are tightened.

✓ Fuses or locally installed protection devices are installed and have not been bypassed.

✓ The power supply voltage matches the voltage on the identification label of the unit.

✓ The specified wires are used for the interconnection cable.

✓ The indoor unit receives signals from the user interface.

✓ There are NO loose connections or damaged electrical components in the switch box.

✓ The insulation resistance of the compressor is OK.

✓ There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units.

✓ There are NO refrigerant leaks.

✓ The correct pipe size is installed and the pipes are properly insulated.

✓ The stop valves (gas and liquid) on the outdoor unit are fully open.

Standard Test Run:

1. In cooling mode, select the lowest programmable temperature. In heating mode, select the highest programmable temperature.

2. When the test run is finished, set the temperature to a normal level (Cooling: 26~28°C, Heating: 20~24°C).

3. Make sure that all functions and parts are working properly.

4. The system stops operating 3 minutes after the unit is turned OFF.

Test Run in Winter Season (for Cooling mode):

1. Press the TEMP ▲, TEMP ▼, and OFF buttons simultaneously.

2. Press TEMP ▲ or TEMP ▼.

3. Select ‘7’.

4. Press FAN.

5. Press COOL to switch the system on. The test run will stop automatically after about 30 minutes.

6. To stop the operation, press OFF.

A safety device might stop the operation if the unit runs outside its operation range. Condensation and water dripping might occur if the unit runs outside its operation range.

The symbols and colors used in the wiring diagrams are defined as follows:

Color Codes:

Symbol Meanings: