DAIKIN CTXF20F5V1B (01) PDF Document

This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons. Installation must be done by an authorized installer.

The complete documentation set for the DAIKIN CTXF20F5V1B consists of:

General safety precautions:

• Safety instructions that you MUST read before installing.

• Format: Paper (in the box of the indoor unit).

Indoor unit installation manual:

• Installation instructions.

• Format: Paper (in the box of the indoor unit).

Installer reference guide:

• Preparation of the installation, good practices, reference data, etc.

Always observe the following safety instructions and regulations for the DAIKIN CTXF20F5V1B:

• Installation shall be done by an installer; the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard.

• Check if the installation location can support the unit’s weight. Poor installation is hazardous and can cause vibrations or unusual operating noise.

• Provide sufficient service space.

• Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may cause vibrations.

• No brazing or welding on site for units with R32 refrigerant charge during shipment.

• During installation of the refrigeration system, joining of parts with at least one part charged shall be performed taking into account the following requirements: inside occupied spaces non-permanent joints are NOT allowed for R32 refrigerant except for site made joints directly connecting the indoor unit to piping. Site made joints directly connecting piping to indoor units shall be of non-permanent type.

• Use the flare nut fixed to the unit.

• To prevent gas leakage, apply refrigeration oil ONLY to the inside of the flare. Use refrigeration oil for R32 (FW68DA).

• Do NOT reuse joints.

• Do NOT use mineral oil on flared part.

• Do NOT reuse piping from previous installations.

• NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material may dissolve and damage the system.

• Connect the refrigerant piping securely before running the compressor. If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run, air will be sucked in. This will cause abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.

• Incomplete flaring may cause refrigerant gas leakage.

• Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.

• Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage.

• Do NOT open the valves before flaring is complete. This would cause refrigerant gas leakage.

• Do NOT open the stop valves before the vacuum drying is finished.

• The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.

• Turn OFF any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.

• Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.

• Only use R32 as refrigerant. Other substances may cause explosions and accidents.

• R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere.

• When charging refrigerant, ALWAYS use protective gloves and safety glasses.

• To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant.

• NEVER directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

• The appliance MUST be installed in accordance with national wiring regulations.

• All wiring MUST be performed by an authorised electrician and MUST comply with the national wiring regulation.

• Make electrical connections to the fixed wiring.

• All components procured on-site and all electrical construction MUST comply with the applicable legislation.

• If the power supply has a missing or wrong N-phase, equipment might break down.

• Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shocks.

• Install the required fuses or circuit breakers.

• Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side.

• Do NOT use taped wires, extension cords, or connections from a star system. They can cause overheating, electrical shocks or fire.

• Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents.

• ALWAYS use multicore cable for power supply cables.

• Use an all-pole disconnection type breaker with at least 3 mm between the contact point gaps that provides full disconnection under overvoltage category III.

• If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

• Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire.

• Do NOT use locally purchased electrical parts inside the product.

• Do NOT branch the power supply for the drain pump, etc. from the terminal block. This could result in electrical shock or fire.

• Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot.

• Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components.

The following accessories are included with the DAIKIN CTXF20F5V1B indoor unit:

• (a) Installation manual (1x)

• (b) Operation manual (1x)

• (c) General safety precautions (1x)

• (d) Spare SSID sticker (1x)

• (e) Indoor unit fixing screw (M4×12L) (2x)

• (f) Dry battery AAA.LR03 (alkaline) for user interface (2x)

• (g) Holder for wireless remote control (user interface) (1x)

• (h) Wireless remote control (user interface) (1x)

• (i) Mounting plate (1x)

The main components are:

• (a) Indoor unit

• (b) Service lid

• (c) Air filter

• (d) Titanium apatite deodorizing and silver particle filter

• (e) Refrigerant piping, drain hose and interconnection cable

• (f) Insulation tape

Use the DAIKIN CTXF20F5V1B within the following ranges for safe and effective operation:

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

Do NOT use the wireless LAN feature of the DAIKIN CTXF20F5V1B near:

• Medical equipment: E.g. persons using cardiac pacemakers or defibrillators. This product may cause electromagnetic interference.

• Auto-control equipment: E.g. automatic doors or fire alarm equipment. This product may cause faulty behaviour of the equipment.

• Microwave oven: It may affect wireless LAN communications.

• Air flow: Make sure nothing blocks the air flow.

• Drainage: Make sure condensation water can be evacuated properly.

• Wall insulation: When conditions in the wall exceed 30°C and a relative humidity of 80%, or when fresh air is inducted into the wall, then additional insulation is required (minimum 10 mm thickness, polyethylene foam).

• Wall strength: Check whether the wall or the floor is strong enough to support the weight of the unit. If there is a risk, reinforce the wall or the floor before installing the unit.

• Spacing: Install the unit at least 1.8 m from the floor and maintain a distance of at least 50 mm from the side walls and 30 mm from the ceiling.

• Storage: The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). It shall be stored so as to prevent mechanical damage and in a well-ventilated room.

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 be disconnected.

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

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 centre.

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

2. Remove 2 screws from the front grille.

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

4. It is recommended to open the flap before removing the front grille.

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

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.

Prerequisite: Remove the front grille.

1. Remove 1 screw from the electrical wiring box.

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

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

1. Remove 1 screw from the service cover.

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

1. Install the mounting plate temporarily.

2. Level the mounting plate.

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

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

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, do NOT forget to seal the gap with putty.

To ensure proper drainage of condensation water for the DAIKIN CTXF20F5V1B, follow these guidelines:

• Pipe length: Keep drain piping as short as possible.

• Pipe size: If drain hose extension or embedded drain piping is required, use appropriate parts that match the hose front end (inner Ø16 mm, outer Ø18 mm).

• Drain hose extension: To extend the drain hose, use a field supplied hose with inner Ø16 mm. Do NOT forget to use a heat insulation tube on the indoor section of the extension hose.

• Condensation: Take measures against condensation. Insulate the complete drain piping in the building.

• Install the drain hose with a downward slope.

• Traps are NOT permitted.

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

1. Remove the air filters.

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

For the DAIKIN CTXF20F5V1B, use phosphoric acid deoxidised seamless copper for refrigerant piping. Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m.

Pipe Outer Diameter (mm):

Piping Temper Grade and Thickness:

Depending on the applicable legislation and the maximum working pressure of the unit, larger piping thickness might be required.

Use polyethylene foam as insulation material with a heat transfer rate between 0.041 and 0.052 W/mK and a heat resistance of at least 120°C.

If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20 mm to prevent condensation on the surface of the insulation.

The flare shape should be 90°±2, with an angle of 45°±2 and a radius of 0.4~0.8.

1. Keep refrigerant piping as short as possible.

2. Connect refrigerant piping to the unit using flare connections, adhering to the specified torque values.

3. Insulate the refrigerant piping, interconnection cable, and drain hose on the indoor unit by wrapping them together with finishing tape.

Make sure to insulate all refrigerant piping. Any exposed piping might cause condensation.

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 (depending on local legislation) to detect small leaks.

2. Check for leaks by applying a recommended bubble test solution to all connections. NEVER use soap water, as it may cause cracking of components or corrosion.

3. Discharge all nitrogen gas.

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

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

3. If moisture is present, 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, do the following:

• Check for leaks again.

• Perform vacuum drying again.

1. Set the indoor unit on the mounting plate hooks. Use the “A” 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 feed-through 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. Set the indoor unit on the mounting plate hooks. Use the “A” 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. Make sure that the wires do NOT get squeezed anywhere.

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).

In case 2 indoor units are installed in 1 room, you can change the channel for the infrared signal receiver on one indoor unit to avoid signal confusion. Perform this setting for only one of the units.

1. Remove the batteries from the user interface.

2. Cut the address jumper on the indoor unit’s PCB. Be careful not to damage any surrounding parts.

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

4. On the remote, press the TEMP up, TEMP down, and OFF buttons simultaneously.

5. Press the TEMP up or TEMP down button.

6. Select the symbol ‘A’ on the remote display.

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 and hold the FAN button for about 5 seconds. The user interface will return to the previous screen.

After installation of the DAIKIN CTXF20F5V1B, check the following items:

☐ You read the complete installation instructions, as described in the installer reference guide.

☐ The indoor units are properly mounted.

☐ The outdoor unit is properly mounted.

☐ Check that the air inlet and outlet of the unit is NOT obstructed by paper sheets, cardboard, or any other material.

☐ There are NO missing phases or reversed phases.

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

☐ Make sure drainage flows smoothly. Possible consequence: Condensate water might drip.

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

☐ The fuses or locally installed protection devices are installed according to this document, 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 the signals of 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.

The test run may be performed in cooling or heating mode. The power supply must be in the specified range.

1. In cooling mode, select the lowest programmable temperature. In heating mode, select the highest programmable temperature. The test run can be disabled if necessary.

2. When the test run is finished, set the temperature to a normal level. In cooling mode: 26~28°C, in heating mode: 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.

When operating the air conditioner in Cooling mode in winter, set it to test run operation using the following method:

1. Press TEMP up, TEMP down, and OFF simultaneously.

2. Press TEMP.

3. Select ‘7’.

4. Press FAN.

5. Press COOL to switch the system on.

Result: Test run operation will stop automatically after about 30 minutes.

6. To stop operation, press OFF.

Some of the functions CANNOT be used in the test run operation mode.

Do NOT try to dismantle the system yourself. The dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. The DAIKIN CTXF20F5V1B MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

The following tables explain the meanings of symbols and colors used in the wiring diagram for the DAIKIN CTXF20F5V1B.

Color Codes

Symbol Meanings