DAIKIN ROOM AIR CONDITIONER INSTALLATION MANUAL

Safety Considerations

[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

• 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 unit in an area where flammable materials are present due to risk of explosions that can cause serious injury or death.
• Safely dispose all packing and transportation materials in accordance with federal/state/local laws or ordinances. Packing materials such as nails and other metal or wood parts, including plastic packing materials used for transportation may cause injuries or death by suffocation.

WARNING

• 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 the event of an accident 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 that it can withstand the weight of the unit. A foundation of insufficient 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 for this unit and that all electrical work is carried out by qualified personnel according to local, state, and national regulations. An insufficient power supply capacity or improper electrical construction may lead to electric shock or fire.
• Make sure that all wiring is secured, that specified wires are used, and that no external forces act on the terminal connections or wires. Improper connections or installation may result in fire.
• When wiring, position the wires so that the electrical wiring box cover can be securely fastened. Improper positioning of the electrical wiring box cover may result in electric shock, fire, or the terminals 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 the terminal cover/panel is 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. Any presence of air or other foreign substance in the refrigerant circuit can cause an abnormal pressure rise or rupture, resulting in injury.
• Do not change the setting of the protection devices. If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Daikin are used, fire or explosion may occur.

CAUTION

• Do not touch the switch with wet fingers. Touching a switch with wet fingers 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. To avoid injury wear gloves or cover the fins while working around them.
• Do not touch the refrigerant pipes during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to 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. Using a charging cylinder may cause the refrigerant to deteriorate.
• Refrigerant R410A in the system must be kept clean, dry, and tight.
• (a) Clean and Dry -- Foreign materials (including mineral oils such as SUNISO oil or moisture) should be prevented from getting into the system.
• (b) Tight -- R410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce the earth's protection again harmful ultraviolet radiation. R410A can contribute to the greenhouse effect if it is released. Therefore take proper measures to check for the tightness of the refrigerant piping installation. Read the chapter Refrigerant Piping Work and follow the procedures.
• Since R410A is a blend, the required additional refrigerant must be charged in its liquid state. If the refrigerant is charged in a state of gas, its composition can change and the system will not work properly.
• The indoor unit is for R410A. See the catalog for indoor models that can be connected. 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, for example, 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

• Install the power supply and inter-unit wires for the indoor and outdoor units at least 3.5ft away from televisions or radios to prevent image interference or noise. Depending on the radio waves, a distance of 3.5ft may not be sufficient to eliminate the noise.
• Dismantling the unit, treatment of the refrigerant, oil and additional parts must be done in accordance with the relevant local, state, and national regulations.
• Do not use the following tools that are 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 the 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 the 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:

• 1) the restrictions on the installation requirements specified in "Indoor Unit Installation Diagram" on page 4 are met,
• 2) both the air inlet and air outlet are unobstructed,
• 3) the unit is not exposed to direct sunlight,
• 4) the unit is away from sources of heat or steam,
• 5) there is no source of machine oil vapour (this may shorten the indoor unit service life),
• 6) cool/warm air is circulated throughout the room,
• 7) the unit is away from electronic ignition type fluorescent lamps (inverter or rapid start type) as they may affect the remote controller range,
• 8) 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),
• 9) 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 diagram illustrates the components and installation points for the indoor unit. It shows the mounting plate (A) and its fixing screw (B). Instructions are provided for attaching the indoor unit by hooking its bottom frame to the mounting plate, with guidance on removing the front grille if needed. The diagram also shows how to remove the indoor unit by pushing up the front grille.

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

Clearance requirements are shown: at least 1-3/16" (30mm) from the ceiling and at least 1-15/16" (50mm) from walls on both sides.

Air filters are shown. The titanium apatite photocatalytic air-purifying filter (C) is mentioned (sold separately for FTXN or FTKN models).

The service lid is removable and its opening method is described: remove screw, pull lid horizontally, then pull down.

Instructions are given to cut thermal insulation pipe to size, wrap it with tape ensuring no gaps, and then wrap the entire pipe with finishing tape from bottom to top.

The wireless remote controller (D) and its fixing screw (F) for the holder (E) are shown. A note advises to check signal reception before screwing the holder to the wall.

Indoor Unit Installation

1. Installing the mounting plate

The mounting plate should 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 drilling points.
2. Secure the mounting plate to the wall with screws.

Recommended mounting plate retention spots and dimensions

09/12 class

Diagram shows the mounting plate with 7 retention spots. It indicates where to place a leveler. Dimensions are provided in inches (mm): 1-3/4 (44.5) top/bottom, 4-5/8 (117) and 4-5/8 (116.5) sides. Gas pipe end is at 1-15/16" (50), liquid pipe end at 13-1/4" (337), and drain hose position is indicated. A pocket is shown for the removed pipe port cover.

15/18/24 class

Diagram shows the mounting plate with 7 retention spots. Dimensions provided in inches (mm): 1-3/4 (44.5) top/bottom, 4-5/8 (117) and 5 (126.5) sides. Gas pipe end is at 2-3/8" (60), liquid pipe end at 17-1/8" (435). Drain hose position is indicated. A note shows how to use a tape measure to position the end of the pipe.

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.

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

Diagram shows wall embedded pipe and wall hole cover, with hole sizes for different classes.

3. Installing the indoor unit

Follow precautions when bending or curing refrigerant pipes to avoid abnormal sound.

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

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 unit as a guide.
4. Open the front panel (refer to "Installation Tips" page 10) and the service lid (refer to "Indoor Unit Installation Diagram" page 4).
5. Pass the inter-unit wire from the outdoor unit through the wall hole to the front of the indoor unit, bending cable tie wires upward.
6. Press the bottom frame of the indoor unit to set it on the mounting plate hooks, ensuring wire leads do not catch.

Diagrams show different piping directions (right-side, right-back, right-bottom) and how to bind pipes with tape. Another diagram shows hanging the unit on the mounting plate hooks and a wire guide.

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

How to replace the drain plug and drain hose

• To replace onto the left side: Remove the drain hose fixing screw on the right, remove the drain hose. Remove the drain plug on the left and attach it to the right. Insert the new drain hose and tighten the fixing screw.

Diagrams show drain hose attachment positions (left/right side, front/back) and how to set the drain plug, warning against applying lubricating oil.

1. Attach the drain hose to the underside of the refrigerant pipes with adhesive vinyl tape.
2. Connect the drain plug to the drain port if not using a drain hose.
3. Shape refrigerant pipes along the path marking on the mounting plate (A).
4. Pass drain hose and refrigerant pipes through the wall hole, then position the indoor unit on the mounting plate hooks using the markings.
5. Pull in the inter-unit wire.
6. Connect the refrigerant pipes.
7. If pulling the drain hose through the back, wrap refrigerant pipes and drain hose together with insulation tape (J).
8. Press the bottom edge of the indoor unit to secure it to the mounting plate hooks with indoor unit fixing screws (H).

Diagrams illustrate left-side, left-back, and left-bottom piping, drain plug setting, and securing the unit with screws.

3-3. Wall embedded piping

Follow instructions for 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.

Diagram shows the drain hose insertion depth into the inner wall and the vinyl chloride drain pipe.

Wiring

1. Insert wires, including the ground wire, into the conduit and secure with a lock nut onto the conduit mounting plate.
2. Strip wire ends (3/4 inch (20mm)).
3. Match wire colors with terminal numbers on the indoor and outdoor unit terminal blocks and secure wires with screws.
4. Connect the ground wire to its terminal.
5. Gently pull wires to ensure secure connection.
6. Shape wires so the service lid fits securely, then close it.

Diagrams show the terminal block, conduit mounting plate, wire retainer, and connections for indoor and outdoor units. It specifies AWG16 for connection wires less than 33ft (10m) and AWG14 for longer runs.

[WARNING] Do not use tapped wires, extension cords, or starburst connections. Do not use locally purchased electrical parts. Do not connect the power wire to the indoor unit. Doing so may cause overheating, electric shock, or fire.

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 submerged in water.
2. Remove air filters and pour water into the drain pan to check for smooth water flow.
3. If drain hose extension or embedded piping is required, use appropriate parts.
4. When extending the drain hose, use a commercially available extension hose with a 5/8 inch (16mm) inner diameter. Thermally insulate the indoor section of the extension hose.

Diagrams illustrate proper drain hose installation and extension hose connection.

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 to prevent filings from entering the pipe.
3. Put the flare nut on the pipe.
4. Flare the pipe.
5. Check that the flaring is done correctly.

Diagrams show pipe cutting, burr removal, and flaring tools (Flare tool for R410A, Conventional flare tool) with specifications for die and nut size. A check section emphasizes a flaw-free inner surface and an evenly flared pipe end.

[WARNING] Do not apply mineral oil to the flare. Prevent mineral oil from entering the system. Never use previously used piping. Never install a dryer. Incomplete flaring may result in refrigerant gas leakage.

2. Refrigerant piping

[CAUTION] Use the flare nut fixed to the main unit. Apply refrigeration oil only to the inner surface of the flare (use R410A oil). Use a torque wrench when tightening flare nuts.

Align flares and tighten nuts 3-4 turns by hand, then fully with a spanner and torque wrench.

Diagrams show applying oil to the flare inner surface, not the outer surface or flare nut. A diagram shows tightening with a spanner and torque wrench.

Piping size and Flare nut tightening torque

2-1. Caution on piping handling

• Protect pipe ends against dust and moisture.
• Use a pipe bender for gentle bends.

Diagrams show placing a cap on pipe ends or covering with tape. A diagram shows pipe bending near a wall.

2-2. Selection of copper and heat insulation materials

When using commercial copper pipes and fittings:

• Insulation material: Polyethylene foam with specified heat transfer rate. Use insulation designed for HVAC Systems. ACR Copper only.

Diagrams show gas pipe, inter-unit wire, liquid pipe, gas pipe insulation, finishing tape, liquid pipe insulation, and drain hose.

• Insulate both gas and liquid piping according to dimensions:

Use separate thermal insulation pipes for gas and liquid refrigerant pipes.

Installation Tips

1. Removing and installing the front panel

Removal method

1. Place fingers in indentations on the unit and open the front panel.
2. Push up the front panel while pushing the left side shaft outward (repeat for the right side).
3. Pull the front panel toward yourself to remove it.

Diagrams show indentations on the unit and the front panel shaft.

Installation method

Align the front panel shaft with the grill grooves, push in fully, then close slowly. Push the center of the lower panel surface to engage hooks.

2. Removing and installing the front grille

Removal method

1. Remove the front panel to access the air filter.
2. Remove 2 screws from the front grille (3 screws for 15, 18, 24-class models).
3. In front of the mark area (3 locations), pull the front grille toward you while pushing down on the upper hooks.

Diagrams show the mark area, upper hooks, and the action of pushing down and pulling.

[CAUTION] Be sure to wear protection gloves. When there is insufficient work space, place hands under the center of the front grille, push up, and pull toward you.

Installation method

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

3. How to set the different addresses

When installing two indoor units in one room, set wireless remote controllers to different addresses. Change the address setting of one unit. Be careful not to damage surrounding parts when cutting jumpers.

1. Remove the battery cover on the remote controller and cut the address jumper.
2. Press TEMP °F/°C and OFF simultaneously.
3. Press TEMP °F/°C, select '8', then 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 from the beginning. Pressing FAN for 5 seconds after completion returns the remote controller to the previous display.

Diagram shows a remote controller with jumper settings (EXIST, CUT) corresponding to ADDRESS 1 and 2, and an indoor unit ON/OFF switch with an OPERATION lamp.

Trial Operation and Testing

1. Trial operation and testing

• Trial operation should be in COOL or HEAT mode.
• Measure supply voltage to ensure it's within the specified range.
• For COOL operation, select the lowest programmable temperature; for HEAT, select the highest.
• Carry out trial operation following the operation manual to check all functions and parts.
• Restart operation is disabled for 3 minutes after the system is turned off.
• After trial operation, set temperature to normal: 78°F-82°F (26°C-28°C) in COOL, 68°F-75°F (20°C-24°C) in HEAT.

To operate in COOL mode in winter or HEAT mode in summer, use the following method:

1. Press TEMP °F/°C and OFF simultaneously.
2. Press TEMP °F/°C, select '7', then press FAN.
3. Press COOL or HEAT to turn on the system.

Trial operation stops automatically after about 30 minutes. Press OFF to stop manually. Some functions may not be available in trial operation mode.

Diagrams show remote controller displays for HEAT PUMP model and COOLING ONLY model during trial operation setup.

• The air conditioner draws standby power. Shut off the circuit breaker if the system is not used for some time.
• If the circuit breaker trips, the system will restore its original operation mode when power is restored.

2. Test items

Company Information

GOODMAN MANUFACTURING COMPANY, L.P.
5151 San Felipe, Suite 500
Houston, TX 77056 USA

DAIKIN INDUSTRIES, LTD.
Head office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com

The document includes an Intertek ETL certification mark.

A two-dimensional barcode is present, identified as a manufacturing code (3P379970-5B M15B134 (1510) HT).