DAIKIN ROOM AIR CONDITIONER INSTALLATION MANUAL

Safety Considerations

Read these Safety Considerations carefully to ensure correct installation. This manual classifies precautions into DANGER, WARNING, and CAUTION. Follow all precautions below; they are all important for ensuring safety.

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Failure to follow any of WARNING is likely to result in such grave consequences as death or serious injury.

CAUTION: Failure to follow any of CAUTION may in some cases result in grave consequences.

After completing installation, test the unit to check for installation errors. Give the user adequate instructions concerning the use and cleaning of the unit according to the Operation Manual.

DANGER

• Refrigerant gas is heavier than air and replaces oxygen. A massive leak could lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.
• If refrigerant gas leaks during installation, ventilate the area immediately. Refrigerant gas may produce a toxic gas if it comes in contact with fire (e.g., from a fan heater, stove, or cooking device). Exposure to this gas could cause severe injury or death.
• After completing installation, check that refrigerant gas does not leak. Refrigerant gas may produce a toxic gas if it comes in contact with fire (e.g., from a fan heater, stove, or cooking device). Exposure to this gas could cause severe injury or death.
• Do not ground units to water pipes, telephone wires, or lightning rods because incomplete grounding could cause a severe shock hazard resulting in severe injury or death, and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death.
• Safely dispose of packing materials. Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries. Tear apart and throw away plastic packaging bags so that children will not play with them. Children playing with plastic bags face the danger of death by suffocation.
• Do not install unit in an area where flammable materials are present due to risk of explosion resulting in serious injury or death.
• Do not ground units to telephone wires or lightning rods because lightning strikes could cause a severe shock hazard resulting in severe injury or death, and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death.

WARNING

• Installation shall be left to the authorized dealer or another trained professional. Improper installation may cause water leakage, electrical shock, fire, or equipment damage.
• Install the air conditioner according to the instructions given in this manual. Incomplete installation may cause water leakage, electrical shock, fire or equipment damage.
• Be sure to use the supplied or exact specified installation parts. Use of other parts may cause the unit to come to fall, water leakage, electrical shock, fire or equipment damage.
• Install the air conditioner on a solid base that is level and can support the weight of the unit. An inadequate base or incomplete installation may cause injury or equipment damage in the event the unit falls off the base or comes loose.
• Electrical work shall be carried out in accordance with the installation manual and the national, state and local electrical wiring codes. Insufficient capacity or incomplete electrical work may cause electrical shock, fire or equipment damage.
• Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance. Follow all appropriate electrical codes.
• For wiring, use a wire or cable long enough to cover the entire distance with no splices if possible. Do not use an extension cord. Do not put other loads on the power supply. Use only a separate dedicated power circuit. (Failure to do so may cause abnormal heat, electric shock, fire or equipment damage.)
• Use the specified types of wires for electrical connections between the indoor and outdoor units. Follow all state and local electrical codes. Firmly clamp the inter-unit wire so their terminals receive no external stresses. Incomplete connections or clamping may cause terminal overheating, fire or equipment damage.
• After connecting all wires, be sure to shape the cables so that they do not put undue stress on the electrical covers, panels or terminals. Install covers over the wires. Incomplete cover installation may cause terminal overheating, electrical shock, fire or equipment damage.
• When installing or relocating the system, be sure to keep the refrigerant circuit free from all substances other than the specified refrigerant (R410A), such as air. (Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise which may result in rupture, resulting in injury.)
• During pump down, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump down, air will be sucked in when the refrigerant piping is removed, causing abnormally high pressure which could lead to equipment damage or personal injury.
• During installation, attach the refrigerant piping securely before running the compressor. If the refrigerant pipes are not attached and the stop valve is open during installation, air will be sucked in when the compressor is run, causing abnormally high pressure which could lead to equipment damage and personal injury.
• Be sure to install a ground fault circuit interrupter. Failure to install a ground fault circuit interrupter may result in electrical shocks, or fire personal injury.

CAUTION

• Do not install the air conditioner where gas leakage would be exposed to open flames. If the gas leaks and builds up around the unit, it may catch fire.
• Establish drain piping according to the instructions of this manual. Inadequate piping may cause water damage.
• Tighten the flare nut according to the specified torque. A torque wrench should be used. If the flare nut is tightened too much, the flare nut may crack over time and cause refrigerant leakage.
• Do not touch the heat exchanger fins. Improper handling may result in injury.
• Be very careful about product transportation. Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
• Electrical work must be performed in accordance with the NEC/CEC by authorized personnel only.

Accessories

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 drawings" 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 Drawings

This section describes the visual elements related to the installation of the indoor unit.

Diagram: Mounting Plate (A) and Fixing Screws (B)

Illustrates the mounting plate (A) and the mounting plate fixing screws (B) with dimensions (3/16" 1" or M4 25mm).

Diagram: How to attach and remove the indoor unit

Shows how to hook the indoor unit's bottom frame to the mounting plate (A). It also details how to remove the indoor unit by pushing up a marked area on the front grille to release hooks. It advises removing the front grille if hooks are difficult to release.

Diagram: Mounting Plate Installation Requirements

Indicates that the mounting plate (A) should be installed on a wall capable of supporting the unit's weight. It shows required clearances: at least 1-3/16" (30mm) from the ceiling and 1-15/16" (50mm) from walls on both sides. It also shows screw placement (3/16" 5/8" or M4 16mm) and notes that 18 and 24-class models use 3 screws. It mentions caulking pipe hole gaps with putty.

Diagram: Titanium Apatite Photocatalytic Air-Purifying Filter (C)

Shows the filter (C) for 09/12 class units (without frame) and 18/24 class units (with frame). It also illustrates how to remove the service lid.

Diagram: Remote Controller Holder (E) and Fixing Screw (F)

Depicts the remote controller holder (E) and its fixing screw (F) (1/8" 13/16" or M3 20mm). It advises checking remote control signal reception before fixing the holder to the wall.

Diagram: Indoor Unit Appearance (09/12 class illustration)

Notes that appearance may differ between models and provides an illustration for the 09/12 class.

Indoor Unit Installation

1. Installing the mounting plate

The mounting plate must be installed on a wall that can support the unit's weight. Steps involve temporarily securing the plate, ensuring it's level, marking drilling points, and then securing it with screws.

Diagram: Recommended mounting plate retention spots and dimensions (09/12 class)

This diagram shows the recommended retention spots (7 in total) for the 09/12 class mounting plate. It provides detailed dimensions in inches and millimeters for the plate's layout, including positions for the through-the-wall hole (2-9/16" / 65mm), drain hose, and gas pipe end. It also indicates a pocket for the removed pipe port cover.

Diagram: Recommended mounting plate retention spots and dimensions (18/24 class)

Similar to the 09/12 class diagram, this shows retention spots (7 in total) and dimensions for the 18/24 class mounting plate. It includes measurements for the through-the-wall hole (3-1/8" / 80mm), drain hose, and gas pipe end. It also shows how to use a tape measure for positioning.

2. Drilling a wall hole and installing wall embedded pipe

For metal frame or board walls, use a wall embedded pipe and cover to prevent heat, shock, or fire. Caulk gaps around pipes to prevent water leakage.

Steps:

1. Drill a feed-through hole: 2-9/16 inch (65mm) diameter for 09/12 class, 3-1/8 inch (80mm) for 18/24 class, angled downwards towards the outside.
2. Insert a wall embedded pipe into the hole.
3. Insert a wall hole cover into the wall pipe.
4. After completing refrigerant piping, wiring, and drain piping, caulk the pipe hole gap with putty.

Diagram: Wall Hole Installation

Illustrates the wall hole drilling process, showing the wall embedded pipe (field supply), wall hole cover (field supply), and caulking (field supply) from the inside to the outside. It specifies hole diameters for 09/12 and 18/24 classes.

3. Installing the indoor unit

Important notes on bending refrigerant pipes: Avoid pressing pipes onto the bottom frame or front grille to prevent abnormal sound.

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 J insulation tape.
3. Pass the drain hose and refrigerant pipes through the wall hole and set the indoor unit on the mounting plate hooks (A), using markings on 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 and to the front of the indoor unit. Bend cable tie wires upward for easier work.
6. Press the bottom frame of the indoor unit to set it on the mounting plate hooks (A). Ensure wires do not catch on the unit's edge.

Diagrams: Right-side piping

Illustrates pipe port cover removal for right-side, right-bottom, and right-back piping. Shows how to bind refrigerant pipe and drain hose together with insulation tape.

Diagram: Hanging the indoor unit

Shows the indoor unit being hung on the mounting plate hooks (A) and how to bundle wire leads with tape.

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

Procedure for replacing the drain plug and drain hose:

1. Remove the drain hose fixing screw on the right and remove the drain hose.
2. Remove the drain plug on the left side and attach it to the right side.
3. Insert the drain hose and tighten with the fixing screw. Failure to tighten may cause water leakage.

Diagram: Drain hose attachment position

Shows the drain hose attachment position on the back of the unit and illustrates the left and right side attachment points for the drain hose and the drain plug. It emphasizes tightening the fixing screw.

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 the drain hose (if no drain hose is used on that side).

Diagram: Setting the drain plug

Shows how to insert the drain plug using a hexagonal wrench (3/16 inch / 4mm). Warns against applying lubricating oil to the plug.

3. Shape the refrigerant pipes along the pipe path marking on the mounting plate (A).
4. Pass the drain hose and refrigerant pipes through the wall hole, then position the indoor unit on the mounting plate hooks (A), using markings on the unit as a guide.
5. Pull in the inter-unit wire.
6. Connect the inter-unit pipes.

Diagram: Left-side piping

Illustrates pipe port cover removal for left-side, left-bottom, and left-back piping. Shows how to bind refrigerant pipes and drain hose together with insulation tape.

Diagram: Securing the indoor unit

Shows how to wrap insulation tape around bent refrigerant pipes and how to secure the indoor unit to the mounting plate (A) with fixing screws (H), ensuring the inter-unit wire does not get caught.

3-3. Wall embedded piping

Follow the instructions for left-side, left-back, or left-bottom piping. Insert the drain hose to a depth so it won't be pulled out of the drain pipe (approx. 1-15/16" / 50mm).

Diagram: Wall embedded piping

Illustrates the drain hose insertion depth for wall embedded piping, showing the inner and outer walls and a vinyl chloride drain pipe (VP-30).

4. Wiring

Steps for 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 to 3/4 inch (20mm).
3. Match wire colors with terminal numbers on the terminal block of indoor and outdoor units and firmly secure wires with screws.
4. Connect the ground wire to the corresponding terminals.
5. Pull wires lightly to ensure secure connection.
6. While closing the service lid, shape wires so the lid fits securely, then close the lid.

Diagram: Wiring connections

Shows the terminal block, electrical wiring box, conduit mounting plate, and conduit. It illustrates wire routing and terminal connections (1, 2, 3 for indoor unit; L1, L2 for outdoor unit). It specifies wire types (AWG16 for < 33ft, AWG14 for >= 33ft) and emphasizes firm screw connections.

WARNING: Do not use tapped wires, extension cords, or starburst connections. Do not use locally purchased electrical parts inside the product. Do not connect the power wire to the indoor unit.

5. Drain piping

Steps for drain piping:

1. Connect the drain hose as described. The hose must be inclined downwards; no trap is 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.

Diagram: Drain hose connection

Illustrates the drain hose connection, showing the required downward inclination and prohibition of submersion. It specifies a 5/8" (16mm) diameter for the hose and extension hose.

If drain hose extension or embedded drain piping is required, use appropriate parts matching the hose front end. When extending, use a commercially available extension hose (5/8" / 16mm inner diameter) and thermally insulate the indoor section.

Diagram: Hose front end illustration

Shows the front end of the indoor unit drain hose and the extension drain hose connection.

Refrigerant Piping Work

1. Flaring the pipe end

Steps for flaring pipe ends:

1. Cut the pipe end with a pipe cutter.
2. Remove burrs with the cut surface facing downward to prevent chips from entering the pipe.
3. Put the flare nut on the pipe.
4. Flare the pipe.
5. Check that the flaring is properly made.

Diagram: Flaring procedure

Illustrates cutting pipe ends at right angles, removing burrs, and the flaring process. It shows dimensions for the flare tool die (0-0.020 inch / 0-0.5mm) and the flare itself (1.0-1.5mm or 1.5-2.0mm depending on tool type). It emphasizes that the flare's inner surface must be flaw-free and the end must be evenly flared in a perfect circle, with the flare nut fitted.

WARNING: Do not use mineral oil on flared parts. Prevent mineral oil from entering the system. Never use piping used for previous installations. Never install a drier to this R410A unit. Incomplete flaring may cause 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 a torque wrench when tightening.

Steps:

1. Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand.
2. Tighten them fully with a spanner and a torque wrench.

Diagram: Applying oil and tightening

Shows applying refrigeration oil to the inner surface of the flare, not the outer surface or flare nut. It illustrates tightening with a spanner and torque wrench.

2-1. Caution on piping handling

• Protect the open end of the pipe against dust and moisture. Use a cap or tape.
• All pipe bends should be as gentle as possible. Use a pipe bender.

Diagram: Pipe protection

Shows protecting the pipe end with a cap or tape against rain and dirt.

2-2 Selection of copper and heat insulation materials

When using commercial copper pipes and fittings:

• Insulation material: Polyethylene foam with a heat transfer rate of 0.041 to 0.052W/mK. Use insulation designed for HVAC Systems.
• Copper: ACR Copper only.

Diagram: Piping and Insulation Layout

Illustrates the layout of gas pipe, liquid pipe, inter-unit wire, and drain hose. It shows insulation for gas and liquid pipes and finishing tape.

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 main unit (left and right sides) and open the front panel until it stops.
2. Push the left side front panel shaft outward, then push up the front panel and remove it. Repeat for the right side.
3. After removing both shafts, pull the front panel toward yourself.

Diagram: Front panel removal

Shows indentations on the main unit and the front panel shaft.

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

2. Removing and installing the front grille

Removal method:

1. Remove the front panel to access the air filter.
2. Remove the 2 screws from the front grille (3 screws for 18 and 24-class models).
3. Locate the marked area on the front grille (3 locations). Push down on the upper hooks while lightly pulling the grille towards you.

Diagram: Front grille removal

Shows the marked area and upper hooks on the front grille. It also includes a note about working space near the ceiling and advises wearing protective gloves.

Installation method:

1. Install the front grille, firmly engaging the upper hooks (3 locations).
2. Install the 2 screws for the front grille (3 for 18/24-class models).
3. 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 [Button 1], [Button 2], and [Button 3] simultaneously.
3. Press [Button 4], select [Address Setting], then press [Button 5]. (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.

Diagram: Remote controller jumper setting

Shows a remote controller with a jumper setting labeled 'ADDRESS 1' and '2', indicating 'EXIST' and 'CUT' options.

If the setting fails, repeat the process. Pressing [Button 6] for about 5 seconds returns the remote controller to the previous display.

Note: Button labels like [Button 1], [Button 2], etc., are placeholders for symbols or specific button icons that were not provided in text. The text mentions ON/OFF and OPERATION lamp.

Trial Operation and Testing

1. Trial operation and testing

Trial operation should be carried out in either COOL or HEAT mode.

1. Measure the supply voltage and ensure it is within the specified range.
2. In COOL operation, select the lowest programmable temperature; in HEAT operation, select the highest programmable temperature.
3. Carry out trial operation according to the Operation Manual to ensure all functions and parts, such as flap movement, are working properly. The system disables restart operation for 3 minutes after it is turned off for protection.
4. After trial operation, set the temperature to a normal level (78F to 82F (26C to 28C) in COOL, 68F to 75F (20C to 24C) in HEAT).

Special mode for winter/summer operation:

When operating the air conditioner in COOL mode in winter, or HEAT mode in summer, set it to trial operation mode using the following method:

1. Press [Button 1], [Button 2], and [Button 3] simultaneously.
2. Press [Button 4], select [Trial Operation Mode], then press [Button 5].
3. Press [Button 7] or [Button 8] to turn on the system.

Trial operation will stop automatically after about 30 minutes. To stop manually, press [Button 6]. Some functions may not be available in trial operation mode.

Note: Button labels are placeholders.

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 the original operation mode when the breaker is reset.

2. Test items