Daikin Room Air Conditioner Installation Manual

Safety Considerations

Read these Safety Considerations for Installation carefully before installing an air conditioner or heat pump. After completing the installation, ensure the unit operates properly during startup. Instruct the user on operation and maintenance. Store this manual with the operation manual for future reference. Always use a licensed installer or contractor. Improper installation can result in water or refrigerant leakage, electric shock, fire, or explosion.

Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:

• DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.
• NOTE: Indicates situations that may result in equipment or property-damage accidents only.

DANGER Points:

• Refrigerant gas is heavier than air and replaces oxygen. A massive leak can lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.
• Do not ground units to water pipes, gas pipes, telephone wires, or lightning rods, as incomplete grounding can cause a severe shock hazard resulting in severe injury or death. Additionally, grounding to gas pipes could cause a gas leak and potential explosion causing severe injury or death.
• If refrigerant gas leaks during installation, ventilate the area immediately. Refrigerant gas may produce toxic gas if it comes into contact with fire. Exposure to this gas could cause severe injury or death.
• After completing the installation work, check that the refrigerant gas does not leak throughout the system.
• Do not install the unit in an area where flammable materials are present due to risk of explosions that can cause serious injury or death.
• Safely dispose of all packing and transportation materials in accordance with federal/state/local laws or ordinances. Packing materials such as nails, metal or wood parts, and plastic packing materials may cause injuries or death by suffocation.

WARNING Points:

• Only qualified personnel must carry out the installation work. Installation must be done in accordance with this installation manual. Improper installation may result in water leakage, electric shock, or fire.
• When installing the unit in a small room, take measures to keep the refrigerant concentration from exceeding allowable safety limits. Excessive refrigerant leaks in a closed ambient space can lead to oxygen deficiency.
• Use only specified accessories and parts for installation work. Failure to use specified parts may result in water leakage, electric shock, fire, or the unit falling.
• Install the air conditioner or heat pump on a foundation strong enough to withstand the unit's weight. Insufficient foundation strength may result in the unit falling and causing injuries.
• Take into account strong winds, typhoons, or earthquakes when installing. Improper installation may result in the unit falling and causing accidents.
• Make sure that a separate power supply circuit is provided and all electrical work is carried out by qualified personnel according to local, state, and national regulations. Insufficient power supply capacity or improper electrical construction may lead to electric shock or fire.
• Make sure that all wiring is secured, specified wires are used, and no external forces act on the terminal connections or wires. Improper connections or installation may result in fire.
• When wiring, position wires so the electrical wiring box cover can be securely fastened. Improper positioning may result in electric shock, fire, or terminal overheating.
• Before touching electrical parts, turn off the unit.
• It is recommended to install a ground fault circuit interrupter if one is not already available. This helps prevent electric shock or fire.
• Securely fasten the outdoor unit terminal cover (panel). If not installed properly, dust or water may enter the outdoor unit causing fire or electric shock.
• When installing or relocating the system, keep the refrigerant circuit free from substances other than the specified refrigerant (R410A) such as air. Presence of air or other foreign substance can cause abnormal pressure rise or rupture, resulting in injury.
• Do not change the setting of the protection devices. Shorting or forcibly operating protection devices, or using non-specified parts, may cause fire or explosion.

CAUTION Points:

• Do not touch switches with wet fingers, as this can cause electric shock.
• Do not allow children to play on or around the unit to prevent injury.
• The heat exchanger fins are sharp enough to cut. Wear gloves or cover fins when working around them.
• Do not touch refrigerant pipes during and immediately after operation, as they may be hot or cold. Your hands may suffer burns or frostbite. Allow pipes time to return to normal temperature or wear proper gloves.
• Install drain piping to proper drainage. Improper drain piping may result in water leakage and property damage.
• Insulate piping to prevent condensation.
• Be careful when transporting the product.
• Do not turn off the power immediately after stopping operation. Always wait for at least 5 minutes before turning off the power, otherwise, water leakage may occur.
• Do not use a charging cylinder, as it may cause refrigerant to deteriorate.
• Refrigerant R410A in the system must be kept clean, dry, and tight.
• (a) Clean and Dry: Prevent foreign materials (including mineral oils or moisture) from getting into the system.
• (b) Tight: R410A does not contain chlorine and does not destroy the ozone layer. However, it can contribute to the greenhouse effect if released. Take proper measures to check for the tightness of the refrigerant piping installation. Refer to the "Refrigerant Piping Work" chapter.
• Since R410A is a blend, additional refrigerant must be charged in its liquid state. Charging in a gaseous state can change its composition and cause the system to malfunction.
• The indoor unit is for R410A. See the catalog for compatible indoor models. Normal operation is not possible when connected to other units.
• Remote controller (wireless kit) transmitting distance can be shorter than expected in rooms with electronic fluorescent lamps (inverter or rapid start types). Install the indoor unit far away from fluorescent lamps as much as possible.
• Indoor units are for indoor installation only. Outdoor units can be installed either outdoors or indoors. This unit is for indoor use.
• Do not install the air conditioner or heat pump in the following locations:
• (a) Where a mineral oil mist or oil spray or vapor is produced (e.g., in a kitchen). Plastic parts may deteriorate and fall off or result in water leakage.
• (b) Where corrosive gas, such as sulfurous acid gas, is produced. Corroding copper pipes or soldered parts may result in refrigerant leakage.
• (c) Near machinery emitting electromagnetic waves. Electromagnetic waves may disturb the operation of the control system and cause the unit to malfunction.
• (d) Where flammable gas may leak, where there is carbon fiber, or ignitable dust suspension in the air, or where volatile flammables such as thinner or gasoline are handled. Operating the unit in such conditions can cause a fire.
• Take adequate measures to prevent the outdoor unit from being used as a shelter by small animals. Small animals making contact with electrical parts can cause malfunctions, smoke, or fire. Instruct the user to keep the area around the unit clean.

NOTE Points:

• Install the power supply and inter-unit wires for the indoor and outdoor units at least 3.5ft (1m) away from televisions or radios to prevent image interference or noise. Depending on radio waves, 3.5ft may not be sufficient to eliminate noise.
• Dismantling the unit, treatment of refrigerant, oil, and additional parts must be done in accordance with relevant local, state, and national regulations.
• Do not use tools used with conventional refrigerants: gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, or refrigerant recovery equipment.
• If conventional refrigerant and refrigerator oil are mixed in R410A, the refrigerant may deteriorate.
• This air conditioner or heat pump is an appliance that should not be accessible to the general public.
• As design pressure is 478 psi, the wall thickness of field-installed pipes should be selected in accordance with relevant local, state, and national regulations.

Accessories

*1 Only for FTX(K)09/12/15/18/24* *2 09/12 class: without frame, 15/18/24 class: with frame

Choosing an Installation Site

Before choosing the installation site, obtain user approval.

1. Indoor unit

The indoor unit should be positioned in a place where:

• The restrictions on the installation requirements specified in "Indoor Unit Installation Diagram" on page 4 are met.
• Both the air inlet and air outlet are unobstructed.
• The unit is not exposed to direct sunlight.
• The unit is away from sources of heat or steam.
• There is no source of machine oil vapour (this may shorten the indoor unit service life).
• Cool/warm air is circulated throughout the room.
• The unit is away from electronic ignition type fluorescent lamps (inverter or rapid start type) as they may affect the remote controller range.
• The unit is at least 3.3ft (1m) away from any television or radio set (the unit may cause interference with the picture or sound).
• No laundry equipment is nearby.

2. Wireless remote controller

Turn on all the fluorescent lamps in the room, if any, and find a location where the remote controller signals are properly received by the indoor unit (within 23ft (7m)).

Indoor Unit Installation Diagram

This section describes the physical layout and components for installing the indoor unit.

• Mounting plate (A): This plate is secured to the wall and serves as the primary support for the indoor unit.
• Mounting plate fixing screw (B): Screws used to attach the mounting plate to the wall.
• Front panel: The removable front cover of the indoor unit.
• Clearances: Diagrams show required clearances from the ceiling (1-3/16" or 30mm or more) and from walls on both sides (1-15/16" or 50mm or more).
• Pipe hole: The hole in the wall for refrigerant pipes and drain hose should be caulked with putty to prevent condensation.
• Insulation pipe: Thermal insulation pipe is used for refrigerant pipes and must be wrapped with tape, ensuring no gaps.
• Air filters (C): These filters are located inside the unit. The diagram shows the filter frame and how it is secured.
• Service lid: A lid that provides access to internal components. The diagram illustrates its removal method (removing a screw, pulling horizontally, then pulling down).
• Remote controller holder (E) and fixing screw (F): The holder for the wireless remote controller, which should be mounted after checking for proper signal reception.
• Unit Removal: Instructions show how to remove the front panel by pushing up on the front grille's marked areas to release hooks, then pulling the unit forward.
• Unit Attachment: The indoor unit's bottom frame hooks onto the mounting plate.

Indoor Unit Installation

1. Installing the mounting plate

The mounting plate must be installed on a wall that can support the weight of the indoor unit.

1. Temporarily secure the mounting plate to the wall. Ensure it is level and mark the drilling points.
2. Secure the mounting plate to the wall with screws.

Recommended mounting plate retention spots and dimensions:

09/12 class: Diagrams show specific screw hole locations and dimensions (in inches and mm) for the mounting plate, indicating where to place a leveler, the drain hose position, gas pipe end, and liquid pipe end. It also shows a pocket to store the removed pipe port cover.

15/18/24 class: Similar diagrams with specific screw hole locations and dimensions, including placement for a leveler, drain hose, gas pipe, and liquid pipe. It also shows how to use a tape measure for positioning.

2. Drilling a wall hole and installing wall embedded pipe

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

• Be sure to caulk the gaps around the pipes with caulking material to prevent condensation.
• Drill a feed-through hole with a diameter of 2-9/16 inch (65mm) for 09/12 class, or 3-1/8 inch (80mm) for 15/18/24 class, through the wall at a downward angle toward the outside.
• Insert a wall embedded pipe into the hole.
• Insert a wall hole cover into the wall pipe.
• After completing refrigerant piping, wiring, and drain piping, caulk the pipe hole gap with putty.

3. Installing the indoor unit

When bending or curing refrigerant pipes, keep the following precautions in mind. Abnormal sound may be generated if improper work is conducted.

• Do not strongly press the refrigerant pipes onto the bottom frame.
• Do not strongly press the refrigerant pipes on the front grille either.

3-1. Right-side, right-back, or right-bottom piping

1. Attach the drain hose to the underside of the refrigerant pipes with adhesive vinyl tape.
2. Wrap the refrigerant pipes and drain hose together with insulation tape (J).
3. Pass the drain hose and refrigerant pipes through the wall hole, then set the indoor unit on the mounting plate (A) hooks, using the markings at the top of the indoor unit as a guide.
4. Open the front panel (Refer to "Installation Tips" on page 10), then open the service lid (Refer to "Indoor Unit Installation Diagram" on page 4).
5. Pass the inter-unit wire from the outdoor unit through the feed-through wall hole and pull it to the front of the indoor unit from the back. Bend the ends of cable tie wires upward for easier work.
6. Press the bottom frame of the indoor unit with both hands to set it on the mounting plate (A) hooks. Ensure wire leads do not catch on the edge of the indoor unit.

3-2. Left-side, left-back, or left-bottom piping

How to replace the drain plug and drain hose:

• Replacing onto the left side: Remove the drain hose fixing screw on the right and remove the drain hose. Remove the drain plug on the left side and attach it to the right side. Insert the drain hose and tighten with the included fixing screw. Forgetting to tighten may cause water leakages.

Drain hose attachment position: The drain hose is on the back of the unit. Diagrams show attachment on the left side and the factory default right side.

1. Attach the drain hose to the underside of the refrigerant pipes with adhesive vinyl tape.
2. Ensure the drain plug is connected to the drain port in place of the drain hose if no drain hose is used.
3. How to set the drain plug: Do not apply lubricating oil (refrigerant oil) to the drain plug when inserting it, as this can cause drain leakage. Insert a hexagonal wrench (3/16 inch or 4mm) to insert the plug.
4. Shape the refrigerant pipes along the pipe path marking on the mounting plate (A).
5. Pass the drain hose and refrigerant pipes through the wall hole, then position the indoor unit on the mounting plate (A) hooks, using the markings at the top of the indoor unit as a guide.
6. Pull in the inter-unit wire.
7. Connect the refrigerant pipes.
8. In case of pulling the drain hose through the back of the indoor unit, wrap the refrigerant pipes and drain hose together with insulation tape (J) as shown in the diagram.
9. To confirm that the inter-unit wire does not catch on the indoor unit, press the bottom edge of the indoor unit with both hands until it is firmly caught by the mounting plate (A) hooks. Secure the indoor unit to the mounting plate (A) with the indoor unit fixing screws (H) 3/16" x 1/2" (M4 x 12mm).

3-3. Wall embedded piping

Follow the instructions given under left-side, left-back, or left-bottom piping.

1. Insert the drain hose to a depth of 1-15/16" (50mm) or more so it won't be pulled out of the drain pipe. A diagram shows the drain hose inserted into a vinyl chloride drain pipe (VP-30) through the wall.

4. Wiring

1. As shown in the illustration, insert the wires, including the ground wire, into the conduit and secure them with a lock nut onto the conduit mounting plate.
2. Strip wire ends to 3/4 inch (20mm).
3. Match wire colours with terminal numbers on the terminal block of the indoor and outdoor units and firmly secure the wires in the corresponding terminals with screws.
4. Connect the ground wire to the corresponding terminals.
5. Pull the wires lightly to make sure they are securely connected.
6. While closing the service lid, shape the wires so that the service lid fits securely, then close the service lid.

Wiring Diagram Description: Illustrates the electrical wiring box, terminal block, wire retainer, conduit mounting plate, conduit, and lock nut. It emphasizes using specified wire types and securely fixing wires with terminal screws. Notes on wire gauge (AWG16 for <33ft, AWG14 for >=33ft) are provided.

WARNING: Do not use tapped wires, extension cords, or starburst connections, as they may cause overheating, electric shock, or fire. Do not use locally purchased electrical parts inside the product. Do not branch power for the drain pump, etc., from the terminal block, as this may cause electric shock or fire. Do not connect the power wire to the indoor unit, as this may cause electric shock or fire.

5. Drain piping

1. Connect the drain hose as described. The drain hose should be inclined downward, with no trap permitted, and the end should not be in water.
2. Remove the air filters and pour some water into the drain pan to check that the water flows smoothly.
3. If drain hose extension or embedded drain piping is required, use appropriate parts that match the hose front end.
4. When extending the drain hose, use a commercially available extension hose with an inner diameter of 5/8 inch (16mm). Be sure to thermally insulate the indoor section of the extension hose.

Drain Piping Diagram Description: Shows the indoor unit drain hose connected to an extension hose, with a diagram of the hose front end and insulation.

Refrigerant Piping Work

1. Flaring the pipe end

1. Cut the pipe end with a pipe cutter.
2. Remove burrs with the cut surface facing downward, so that filings do not enter the pipe.
3. Put the flare nut on the pipe.
4. Flare the pipe using a flare tool.
5. Check that the flaring has been done correctly.

Flaring Tools and Checks: Diagrams show pipe cutting at right angles, deburring, and setting the flare tool. It details specifications for R410A flare tools (clutch-type die A) and conventional flare tools (clutch-type, wing-nut type). Checkpoints include: the flare's inner surface must be flaw-free, the pipe end must be evenly flared in a perfect circle, and the flare nut must be fitted.

WARNING: Do not apply mineral oil to the flare. Prevent mineral oil from getting into the system as this would reduce the service life of the units. Never use piping that has been used for previous installations; only use parts delivered with this unit. Never install a dryer to this R410A unit. The drying material may dissolve and damage the system. Incomplete flaring may result in refrigerant gas leakage.

2. Refrigerant piping

CAUTION: Use the flare nut fixed to the main unit to prevent cracking. To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare (use R410A refrigeration oil). Use a torque wrench when tightening flare nuts to prevent damage and gas leakage.

• Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand, then tighten them fully with a spanner and a torque wrench. Diagrams show correct oil application (inner surface only) and tightening procedure.

2-1. Caution on piping handling

• Protect the open end of the pipe against dust and moisture. Use a cap or tape if a flare cap is not available.
• All pipe bends should be as gentle as possible. Use a pipe bender for bending.

Piping Specifications: A table lists pipe sizes (O.D.), minimum bend radius, piping thickness, and corresponding flare nut tightening torque values for gas and liquid sides.

Insulation Materials: Use polyethylene foam insulation. Heat transfer rate should be between 0.041 to 0.052 W/mK. Use ACR Copper only. Both gas and liquid piping must be insulated according to specified dimensions (I.D. and thickness).

Installation Tips

1. Removing and installing the front panel

Removal method: Place fingers in the indentations on the main unit (left and right sides) and open the front panel until it stops. Push up the front panel shaft outward to remove it. After removing both shafts, pull the front panel toward yourself.

Installation method: Align the front panel shaft with the grill grooves, push it in, and close slowly. Push the center of the lower panel surface firmly to engage the hooks.

2. Removing and installing the front grille

Removal method: Remove the front panel to access the air filter. Remove the 2 screws (3 for 15, 18, 24-class models) from the front grille. Pull the front grille lightly toward you with one hand while pushing down on the upper hooks (3 locations) with the fingers of your other hand.

Limited Space Caution: Wear protection gloves. Place both hands under the center of the front grille, push up, and pull toward you.

Installation method: Install the front grille, engaging the upper hooks (3 locations). Install the 2 screws (3 for 15, 18, 24-class models). Install the air filter and then mount the front panel.

3. How to set the different addresses

When two indoor units are installed in one room, their wireless remote controllers can be set for different addresses. Change the address setting of one unit.

1. Remove the battery cover on the remote controller and cut the address jumper.
2. Press the TEMP [Up], TEMP [Down], and OFF buttons simultaneously.
3. Press TEMP [Up], then select the address number, and press FAN. (The indoor unit OPERATION lamp will blink for about 1 minute.)
4. Press the indoor unit ON/OFF switch while the OPERATION lamp is blinking.

If setting fails, repeat the process. Pressing FAN for about 5 seconds after setting completes will return the remote controller to the previous display.

Trial Operation and Testing

1. Trial operation and testing

• Trial operation should be carried out in either COOL or HEAT operation.
• Measure the supply voltage and ensure it is within the specified range.
• In COOL operation, select the lowest programmable temperature; in HEAT operation, select the highest programmable temperature.
• Carry out trial operation following the operation manual to ensure all functions and parts, such as flap movement, are working properly.
• To protect the air conditioner, restart operation is disabled for 3 minutes after the system has been turned off.
• After trial operation is complete, set the temperature to a normal level (78°F to 82°F / 26°C to 28°C in COOL, 68°F to 75°F / 20°C to 24°C in HEAT).

Trial Operation Mode for Off-Season Use:

• When operating in COOL mode in winter, or HEAT mode in summer, set to trial operation mode:
1. Press TEMP [Up], TEMP [Down], and OFF simultaneously.
2. Press TEMP [Up], select the desired setting, then press FAN.
3. Press COOL or HEAT to turn on the system.
• Trial operation will stop automatically after about 30 minutes. Press OFF to stop manually.
• Some functions may not be available in trial operation mode.

The air conditioner draws a small amount of power in standby mode. If the system is not to be used for some time after installation, shut off the circuit breaker to eliminate unnecessary power consumption. If the circuit breaker trips, the system will restore its original operation mode when the breaker is opened again.

2. Test items