Daikin Room Air Conditioner Installation Manual

MODELS

FTX09NMVJU, FTK09NMVJU, FTX12NMVJU, FTK12NMVJU, FTX15NMVJU, FTK18NMVJU, FTX18NMVJU, FTK24NMVJU, FTX24NMVJU, FTKN09NMVJU, FTKN12NMVJU, FTKN18NMVJU, FTKN24NMVJU

RX09NMVJU, RK09NMVJU, RXL09QMVJU, RX12NMVJU, RK12NMVJU, RXL12QMVJU, RX18NMVJU, RK18NMVJU, RXL15QMVJU, RX24NMVJU, RK24NMVJU, RXN09NMVJU, RKN09NMVJU, RXN12NMVJU, RKN12NMVJU, RXN18NMVJU, RKN18NMVJU, RXN24NMVJU, RKN24NMVJU

Contents

1. Safety Considerations
2. Accessories
3. Choosing an Installation Site
4. Indoor Unit Installation Diagram
5. Indoor Unit Installation
6. Refrigerant Piping Work
7. Installation Tips
8. Trial Operation and Testing
9. Precautions for Selecting a Location
10. Precautions on Installation
11. Outdoor Unit Installation Diagram
12. Installation Space Requirements
13. Outdoor Unit Installation
14. Wiring
15. Facility Setting (cooling at low outdoor temperature)
16. Pump Down Operation

Safety Considerations

Read these Safety Considerations for Installation carefully before installing an air conditioner or heat pump. After completing the installation, make sure that the unit operates properly during the startup operation. Instruct the user on how to operate and maintain the unit. Inform users that they should store this installation manual with the operation manual for future reference. Always use a licensed installer or contractor to install this product. 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

• 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

Diagram illustrating the indoor unit installation components. It shows the mounting plate (A) and its fixing screw (B), the front panel, air filters, and the titanium apatite photocatalytic air-purifying filter (C). Instructions are provided on how to attach the indoor unit to the mounting plate by hooking the bottom frame to the plate, and how to remove the front grille and front panel. Key dimensions for clearance are indicated: 1-15/16 inches (50mm) or more from walls on both sides, and 1-3/16 inches (30mm) or more from the ceiling. The diagram also shows the service lid and its opening method, and the wireless remote controller (D) with its holder (E) and fixing screw (F). It emphasizes that the mounting plate must be installed on a wall capable of supporting the unit's weight.

Indoor Unit Installation

1. Installing the mounting plate

The mounting plate should be installed on a wall which 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.

Diagrams show recommended mounting plate retention spots and dimensions for 09/12 class and 15/18/24 class units. These diagrams detail measurements for screw holes, pipe port locations, drain hose position, and indicate where to place a leveler. For the 09/12 class, dimensions like 4-5/8" (117mm) and 11-1/4" (285mm) are shown. For the 15/18/24 class, dimensions like 4-5/8" (117mm) and 11-5/8" (295mm) are shown. The diagrams also indicate the location for the removed pipe port cover and 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.

• 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 downwards.
• Insert a wall embedded pipe and then a wall hole cover.
• After completing piping, wiring, and drain piping, caulk the pipe hole gap with putty.

Diagram shows a cross-section of a wall with a wall embedded pipe and wall hole cover, indicating inside and outside, and the caulking material. Dimensions for the hole diameter are specified for 09/12 class (2-9/16") and 15/18/24 class (3-1/8").

3. Installing the indoor unit

Follow precautions regarding bending or curing refrigerant pipes to avoid abnormal sounds.

• 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.
3. Pass the drain hose and refrigerant pipes through the wall hole, then set the indoor unit on the mounting plate hooks using the markings at the top of the unit as a guide.
4. Open the front panel and service lid.
5. Pass the inter-unit wire from the outdoor unit through the wall hole to the front of the indoor unit, then pull them at the front side. Bend 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 illustrate right-side, right-back, and right-bottom piping configurations, showing how to remove pipe port covers, bind pipes and drain hose with insulation tape, and hang the unit on the mounting plate hooks. A wire guide is also shown.

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 fixing screw of the drain hose on the right, remove the drain hose, remove the drain plug on the left, and attach it to the right side. Insert the drain hose and tighten with the fixing screw. Forgetting to tighten may cause water leakages.

Diagrams show the drain hose attachment position on the back of the unit and attachment on the left and right sides of the unit's front. It also details how to set the drain plug, advising against applying lubricating oil and showing the use of a hexagonal wrench.

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 in place of without drain hose.
3. Shape the refrigerant pipes along the pipe path marking on the mounting plate.
4. Pass the drain hose and refrigerant pipes through the wall hole, then position the indoor unit on the mounting plate hooks.
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.
8. Secure the indoor unit to the mounting plate with the indoor unit fixing screws (H).

Diagram shows the left-side, left-back, and left-bottom piping configurations, including wrapping insulation tape around bent refrigerant pipes and securing the unit with fixing screws.

3-3. Wall embedded piping

Follow instructions for left-side, left-back, or left-bottom piping. Insert the drain hose to a depth that prevents it from being pulled out of the drain pipe.

Diagram shows a cross-section of an inner and outer wall, illustrating the insertion depth of the drain hose into the drain pipe (1-15/16" (50mm) or more).

4. Wiring

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. Do not branch power for the drain pump from the terminal block. Doing so may cause electric shock or fire. Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fire.

1. Insert wires, including the ground wire, into the conduit and secure with a lock nut.
2. Strip wire ends (3/4 inch (20mm)).
3. Match wire colors with terminal numbers on the terminal blocks of indoor and outdoor units and secure wires with screws.
4. Connect the ground wire.
5. Pull wires lightly to ensure secure connection.
6. Close the service lid, ensuring wires fit securely.

Diagrams show the terminal blocks for indoor and outdoor units, conduit mounting, and wire connections. It specifies wire types (AWG16 for <33ft, AWG14 for >=33ft) and includes a method for mounting conduit for 09/12 class units (removing stop valve cover, protection plate, conduit mounting cover) and 15/18/24 class units (removing service lid).

5. Drain piping

1. Connect the drain hose as described.
2. Remove air filters and pour water into the drain pan to check for smooth flow.
3. Use appropriate parts for drain hose extension or embedded drain piping.
4. When extending the drain hose, use a commercially available extension hose (5/8 inch inner diameter) and thermally insulate the indoor section.

Diagram shows the correct inclination of the drain hose (downward), prohibition of traps, and not putting the hose end in water. It also illustrates the figure of the hose front end and the connection of the indoor unit drain hose with an extension hose and heat insulation tube.

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.
3. Put the flare nut on the pipe.
4. Flare the pipe.
5. Check that the flaring is done correctly.

Diagrams show how to cut pipe ends at right angles, remove burrs, and set up flaring tools (Flare tool for R410A, Conventional flare tool). It specifies dimensions for the die and checks for a flaw-free inner surface and even flaring. A warning is given not to apply mineral oil to the flare.

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 a torque wrench.

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

Diagrams illustrate applying oil to the inner surface of the flare and tightening with a spanner and torque wrench. A table lists piping sizes (O.D. 3/8" to 5/8" for gas, O.D. 1/4" for liquid) and their corresponding flare nut tightening torques in ft-lbf and Nm.

2-1. Caution on piping handling

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

Diagram shows a rain scenario with a wall, advising to place a cap on the pipe end or cover it with tape.

2-2. Selection of copper and heat insulation materials

When using commercial copper pipes and fittings:

• Insulation material: Polyethylene foam with specified heat transfer rates.
• Use ACR Copper only.
• Insulate both gas and liquid piping.

Diagrams show gas and liquid pipes with insulation and finishing tape. A table details piping sizes, minimum bend radius, piping thickness, thermal insulation size (I.D.), and thermal insulation thickness.

Installation Tips

1. Removing and installing the front panel

Removal method: Place fingers in indentations, open panel, push up shaft, and remove panel. Diagrams show indentations on the unit and the front panel shaft.

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

2. Removing and installing the front grille

Removal method: Remove front panel and air filter. Remove screws from front grille. Pull grille towards you while pushing down on upper hooks. Diagrams show hook locations and the action of pulling and pushing.

Installation method: Engage upper hooks, install screws, then install air filter and front panel.

3. How to set the different addresses

For setting different addresses for two indoor units with separate remote controllers:

1. Remove battery cover and cut address jumper on remote.
2. Press TEMP and OFF simultaneously.
3. Press TEMP, select address (e.g., 8), press FAN. The indoor unit OPERATION lamp will blink.
4. Press indoor unit ON/OFF switch while lamp is blinking.

If setting fails, repeat. Pressing FAN for 5 seconds returns the remote to the previous display. A diagram shows the remote controller buttons and a jumper table (EXIST: 1, CUT: 2).

Trial Operation and Testing

1. Trial operation and testing

• Trial operation should be in COOL or HEAT mode.
• Measure supply voltage and ensure it's within range.
• Set lowest programmable temperature in COOL, highest in HEAT.
• Follow operation manual to ensure all functions work. Restart operation is disabled for 3 minutes after shutdown.
• After trial operation, set temperature to normal: 78-82°F (26-28°C) in COOL, 68-75°F (20-24°C) in HEAT.
• For winter COOL or summer HEAT operation, activate trial operation mode using specific button presses (TEMP + OFF, then TEMP + select 7 + FAN, then COOL or HEAT).
• Trial operation stops automatically after 30 minutes; press OFF to stop manually. Some functions may not be usable.
• Shut off circuit breaker if system is not used for a period to eliminate standby power consumption. The system restores original mode when breaker is re-opened.

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

2. Test items

Precautions for Selecting a Location

1. Choose a solid place to bear weight and vibration, where operating sound is not amplified.
2. Choose a location where discharged air or operating sound won't bother neighbors.
3. Avoid locations near bedrooms where sound may cause disturbance.
4. Ensure sufficient space for carrying the unit in and out.
5. Ensure sufficient space for air passage and no obstructions around air inlet/outlet.
6. Site must not be prone to flammable gas leaks.
7. Install units, power cords, and inter-unit wire at least 10ft (3m) away from TVs and radios to prevent interference.
8. Coastal areas or places with salty atmosphere or sulfate gas may shorten unit life due to corrosion.
9. Since water flows from the outdoor unit drain, do not place items that must be kept away from moisture underneath the unit.

NOTE: Cannot be installed suspended from a ceiling or stacked.

CAUTION: When operating in low outdoor ambient temperature:

• To prevent exposure to wind, install outdoor unit with suction side facing the wall. Never install where suction side is exposed directly to wind.
• Consider installing a baffle plate on the air discharge side.
• In heavy snow areas, select a site where snow won't affect the unit. Attach a snow protection hood if snow accumulation is likely.
• In high humidity or heavy snow areas, consider a drain pan heater to prevent ice build-up.

Diagrams suggest constructing a large canopy, a pedestal, and installing the unit high off the ground to prevent snow burial.

Precautions on Installation

• Check installation surface strength and level to prevent vibrations or noise.
• Fix unit securely using foundation bolts (4 sets of 5/16" (M8) or 3/8" (M10) bolts, nuts, and washers recommended).
• Screw foundation bolts until ends are 3/4 inch (20mm) from the surface.

Diagram shows foundation bolt installation with a 3/4" (20mm) projection.

Outdoor Unit Installation Diagram

Diagram shows outdoor unit dimensions and installation parameters. It details maximum and minimum allowable piping lengths and maximum allowable piping height for different model groups (RX09/12, RX18/RXN18, RX24/RXN24, etc.). It also specifies additional refrigerant requirements for piping exceeding 32.8ft (10m). Gas pipe and liquid pipe sizes are listed. The diagram includes dimensions for the unit's footprint (X, Y, Z bolt-hole centers) and required clearances (e.g., 9-13/16" (250mm) from wall, 11-13/16" (300mm) below ceiling). It also illustrates how to remove and attach the stop valve cover. A caution note specifies recommended piping lengths for different model groups to avoid noise and vibration. It also advises using block bases for poor drainage and adjusting foot height for leveling.

Installation Space Requirements

Follow these requirements for outdoor unit intake and exhaust airflow, considering walls or obstacles. The wall height on the outlet side should be 47-1/4 inch (1200mm) or less.

Diagrams illustrate required clearances for the 09/12 class and 15/18/24 class units for walls facing one, two, or three sides. Clearances are given in inches (mm), e.g., More than 1-15/16" (50mm) for side view, More than 3-15/16" (100mm) for top view.

Outdoor Unit Installation

1. Installing the outdoor unit

Refer to "Precautions for Selecting a Location" and the "Outdoor Unit Installation Diagram".

2. Drain work (only for heat pump models, excluding RXL models)

CAUTION: In cold areas, do not use a drain socket, drain caps, or drain hose with the outdoor unit, as drain water may freeze and impair heating performance.

• If the drain port is covered by a mounting base or floor surface, place additional foot bases (at least 1-1/4 inch (30mm) high) under the unit's feet.
• Attach drain cap (1) and drain cap (2).
• Attach drain socket (B). When attaching the drain socket, connect the drain hose to it first.

Diagrams show drain cap and socket configurations for 09/12 and 15/18/24 class units, and how to attach the drain socket to the bottom frame.

3. Flaring the pipe end

Follow the steps: Cut pipe, remove burrs, put on flare nut, flare pipe, and check for correctness. Diagrams show cutting, burr removal, and flaring tool usage with dimensions and checks for a proper flare. A warning is given not to apply mineral oil to the flare.

4. Refrigerant piping

CAUTION: Use the unit's flare nut. Apply refrigeration oil only to the inner surface of the flare. Use a torque wrench.

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

Diagrams show oil application and tightening. A table lists piping sizes and corresponding flare nut tightening torques.

5. Pressure test and evacuating system

WARNING: Do not mix substances other than R410A. Recover refrigerants properly. Use only R410A vacuum pumps.

CAUTION: Avoid opening/closing stop valves below -5°F (-21°C) to prevent leakage.

• After piping, perform pressure test and evacuate system.
• If using additional refrigerant, purge air first.
• Use a hexagonal wrench for stop valves. Tighten joints with a torque wrench.
• Pressurize liquid and gas pipes to 550psi (3.8MPa) for 1-24 hours. Check for leaks.
• Connect gauge manifold to gas stop valve service port.
• Open low-pressure valve (Lo), close high-pressure valve (Hi).
• Evacuate system to below 500 microns for 1 hour.
• Close low-pressure valve (Lo), stop vacuum pump. Monitor gauge pointer.
• Remove valve caps.
• Turn liquid stop valve 90° counter-clockwise for 5 seconds to check for gas leakage using soapy water.
• Disconnect charging hose, fully open liquid and gas stop valves.
• Tighten valve caps and service port caps with torque wrench.

Diagram shows the setup for pressure testing and evacuation, including a compound pressure gauge, manifold, valves, charging hoses, and vacuum pump.

6. Refilling refrigerant

Check machine nameplate for refrigerant type. Add R410A in liquid form. Adding in gas form can change composition.

• Check cylinder for siphon attachment.

Diagrams show filling a cylinder with an attached siphon (upright) and filling other cylinders (upside-down).

7. Refrigerant piping work

7-1. Cautions on pipe handling

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

Diagram shows a rain scenario with a wall, advising to place a cap on the pipe end or cover it with tape.

7-2. Selection of copper and heat insulation materials

When using commercial copper pipes and fittings:

• Insulation material: Polyethylene foam.
• Use ACR Copper only.
• Insulate both gas and liquid piping.

Diagrams show pipe insulation. A table details piping sizes, minimum bend radius, piping thickness, thermal insulation size, and thickness.

Wiring

WARNING: Do not use tapped wires, extension cords, or starburst connections. Do not use locally purchased electrical parts. Do not branch power for drain pump. Install a ground fault circuit interrupter capable of handling higher harmonics. Use an all-pole disconnection type circuit breaker. Do not pull at the conduit. Do not connect power wire to indoor unit. Do not turn on circuit breaker until all work is completed.

1. Strip wire insulation (3/4 inch (20mm)).
2. Connect inter-unit wires, matching terminal numbers, and tighten screws securely.

Diagrams show wiring connections for indoor and outdoor units, including terminal blocks, conduit mounting, and wire types (AWG16/AWG14). It details conduit mounting methods for 09/12 class (removing covers) and 15/18/24 class (removing service lid). Precautions for power supply wiring, including using round crimp-style terminals for stranded wires and curling single core wire ends, are shown with diagrams illustrating good and wrong practices.

Facility Setting* (cooling at low outdoor temperature)

This function is for facilities (e.g., computer rooms), not residences or offices. Only for RX, RK, and RXL models.

• Cutting jumper J6 expands operation range down to 5°F (-15°C). Unit stops below -4°F (-20°C) and restarts when temperature rises.
• Steps involve removing outdoor unit top and front plates and cutting jumper J6.

CAUTION: If outdoor unit heat exchanger is exposed to wind, provide a windbreak. Intermittent noises may occur. Do not place humidifiers nearby. Cutting J6 sets indoor fan tap to highest position.

Pump Down Operation

To protect the environment, pump down before relocating or disposing of the unit.

1. Remove valve caps from liquid and gas stop valves.
2. Carry out forced cooling operation.
3. After 5-10 minutes, close liquid stop valve with a hexagonal wrench.
4. After 2-3 minutes, close gas stop valve and stop forced cooling operation.

Instructions are provided for forced cooling operation using the indoor unit ON/OFF switch (press for at least 5 seconds) or the remote controller (specific button sequences for wall-mounted and floor-standing units). Diagrams show the remote controller displays and the liquid/gas stop valves.

CAUTION: Do not touch the terminal block when pressing switches, as it has high voltage.

Trial Operation and Testing

1. Trial operation and testing

• Trial operation in COOL or HEAT mode.
• Measure supply voltage.
• Set lowest temp in COOL, highest in HEAT.
• Ensure all functions work. Restart disabled for 3 mins after shutdown.
• Set normal temp after operation: 78-82°F (26-28°C) COOL, 68-75°F (20-24°C) HEAT.
• Activate trial operation mode using specific button presses for winter COOL or summer HEAT.
• Operation stops automatically after 30 mins; press OFF to stop.
• Shut off circuit breaker if system is unused to save power.

Diagrams show remote controller displays for HEAT PUMP and COOLING ONLY models.

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

Intertek ETL Listed Mark: 3P379970-5B M15B134 (1510) HT