DAIKIN INSTALLATION MANUAL R410A Split Series

Safety Precautions

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

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

The following safety symbols are used throughout this manual:

• Instruction to Observe: A red exclamation mark inside a triangle indicates a critical warning.
• Earth Connection: A symbol resembling a trident or three horizontal lines connected by a vertical line indicates the need for an earth connection.
• Prohibition: A red circle with a diagonal line through it indicates an action that must never be attempted.

After completing installation, test the unit and provide the user with adequate instructions according to the Operation Manual.

WARNINGS:

• Installation should be performed by a dealer or professional. Improper installation can lead to water leakage, electrical shock, or fire.
• Use only supplied or specified installation parts. Using other parts may cause unit malfunction, water leakage, electrical shock, or fire.
• Install the unit on a solid base capable of supporting its weight. An inadequate base may cause injury if the unit falls.
• Electrical work must comply with the installation manual and national wiring rules. Insufficient electrical work can cause shock or fire.
• Use a dedicated power circuit. Never share a power supply with other appliances.
• Use appropriate wire lengths for connections and avoid extension cords. Do not overload the power supply.
• Use specified wire types for connections between indoor and outdoor units. Ensure terminals are securely clamped to prevent overheating or fire.
• Shape cables to avoid undue force on electrical covers. Install covers over wires to prevent overheating or shock.
• If refrigerant leaks during installation, ventilate the room, as refrigerant can produce toxic gas when exposed to flames.
• After installation, check for refrigerant leaks.
• Keep the refrigerant circuit free from substances other than the specified refrigerant (R410A), such as air, to prevent abnormal pressure rise or rupture.
• During pump-down, stop the compressor before removing refrigerant piping to prevent air from being sucked in.
• Attach refrigerant piping securely before running the compressor.
• Ensure a proper earth connection. Do not earth to utility pipes, arresters, or telephone earths.
• Install an earth leakage breaker to prevent electric shocks or fire.

CAUTIONS:

• Do not install in areas with a risk of flammable gas leakage, as the gas may ignite.
• Establish drain piping correctly; inadequate piping can cause flooding.
• Tighten flare nuts using a torque wrench to prevent cracking and refrigerant leakage.

Accessories

The following accessories are included with the indoor unit:

• Mounting plate (1)
• Titanium Apatite Photocatalytic Air-Purifying Filter (2)
• Wireless remote controller (1)
• Remote controller holder (1)
• AAA dry-cell batteries (2)
• Operation manual (1)
• Installation manual (1)
• Indoor unit fixing screws (M4 x 12L) (2)

Choosing an Installation Site

Before choosing the installation site, obtain user approval.

1. Indoor unit:

The indoor unit should be sited in a place where:

1. Installation restrictions specified in the drawings are met.
2. Both air intake and exhaust have clear paths.
3. The unit is not in the path of direct sunlight.
4. The unit is away from heat or steam sources.
5. There is no source of machine oil vapour.
6. Cool (warm) air can be circulated throughout the room.
7. The unit is away from electronic ignition type fluorescent lamps that might affect remote control range.
8. The unit is at least 1 metre away from televisions or radio sets to avoid interference.
9. The unit is installed at the recommended height of 1.8m.

2. Wireless remote controller:

Find a site where remote control signals are properly received by the indoor unit (within 7 metres) after turning on all room fluorescent lamps.

Installation Tips

1. Removing and installing front panel:

Removal method: Place fingers in the unit's indentations on the left and right sides, open the panel until it stops. Slide the panel to the right and pull towards you to disengage the left rotating shaft. Slide to the left and pull towards you to disengage the right rotating shaft.

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

Diagram: Shows indentations on the main unit and the rotating shaft of the front panel being pushed into a groove.

2. Removing and installing front grille:

Removal method: Remove the front panel to access the air filter. Remove the two screws from the front grille. Lightly pull the grille towards you with one hand and push down on the three upper hooks with the fingers of your other hand.

Diagram: Illustrates removing the front grille by releasing upper hooks after removing screws.

When there is no work space because the unit is close to ceiling:

CAUTION: Be sure to wear protection gloves.

Place both hands under the center of the front grille, push up, and pull the grille towards you.

Installation method: Install the front grille, engaging the three upper hooks. Install the two screws. Install the air filter and then mount the front panel.

3. How to set the different addresses:

For dual-unit installations, set wireless remote controllers to different addresses by cutting address jumpers JA (on the printed circuit board) and J4 (in the remote controller).

Diagram: Shows locations of jumpers JA and J4 labeled 'EXIST' and 'CUT' for address setting.

Indoor Unit Installation Drawings

Diagram: Shows the mounting plate attached to a wall, with the indoor unit's bottom frame hooking onto it. Includes details on removing the unit by releasing claws via a marked area on the front grille. Shows clearance requirements: 30mm from ceiling, 50mm from sides. Also depicts air filters, filter frame, service lid opening, insulation wrapping, and remote controller holder mounting.

Mounting plate installation: The mounting plate should be installed on a wall that can support the unit's weight. Temporarily secure the plate, ensure it is level, mark boring points, and then secure it with screws.

Diagram: Provides recommended mounting plate retention spots and dimensions for precise installation.

Diagram: Shows the removed pipe port cover can be stored in the mounting plate pocket.

Indoor Unit Installation

1. Installing the mounting plate:

The mounting plate must be installed on a wall capable of supporting the indoor unit's weight. Temporarily secure the plate, ensure it is level, mark the boring points, and then fix it to the wall with screws.

Diagram: Shows recommended mounting plate retention spots and dimensions, including measurements for leveling and pipe/drain hole placement.

2. Boring a wall hole and installing wall embedded pipe:

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

1. Bore a 65mm feed-through hole, sloped downwards towards the outside.
2. Insert a wall pipe into the hole.
3. Insert a wall cover into the wall pipe.
4. After piping, wiring, and drain piping are complete, caulk the pipe hole gap with putty.

Diagram: Illustrates boring a wall hole, inserting a wall pipe and cover, and caulking the gap.

3. Installing indoor unit:

Take care when bending or curing refrigerant pipes to avoid abnormal sounds.

1. Do not press refrigerant pipes strongly onto the bottom frame.
2. Do not press refrigerant pipes strongly on the 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. 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 (refer to Installation Tips).
5. Pass interconnecting wires from the outdoor unit through the wall hole and into the indoor unit. Pull them through the front. Bend tie wire ends upward for easier handling. Bundle stripped wire ends with adhesive tape if necessary.
6. Press the bottom frame of the indoor unit with both hands to seat it on the mounting plate hooks. Ensure wires do not catch on the unit's edge.

Diagram: Shows different piping routes (right-side, right-back, right-bottom) and how to attach the drain hose and wrap pipes. Also illustrates setting the unit onto mounting plate hooks and passing wires.

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

How to replace the drain plug and drain hose:

For left-side replacement: Remove insulation fixing screws on the right to detach the drain hose. Reattach the screw. Remove the drain plug on the left and attach it to the right side. Insert the drain hose and tighten with the indoor unit fixing screw.

Diagram: Shows drain hose attachment positions on the left and right sides of the unit.

1. Attach the drain hose to the underside of the refrigerant pipes with adhesive vinyl tape.
2. Connect the drain hose to the drain port in place of a drain plug.
3. Shape the refrigerant pipe along the path marking on the mounting plate.
4. Pass the drain hose and refrigerant pipes through the wall hole. Set the indoor unit on the mounting plate hooks, using the top markings as a guide.
5. Pull in the interconnecting wires.
6. Connect the inter-unit piping.
7. Wrap the refrigerant pipes and drain hose together with insulation tape, especially if the drain hose exits through the back of the unit.
8. Carefully press the bottom edge of the indoor unit with both hands until it is firmly caught by the mounting plate hooks. Secure the unit with screws (M4 x 12L).

Diagram: Illustrates left-side piping, drain hose connection, and the process of securing the unit to the mounting plate.

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 the correct depth for inserting the drain hose into a drain pipe.

Wiring

1. Strip wire ends to 15mm.
2. Match wire colours to terminal numbers on indoor and outdoor unit terminal blocks and screw wires firmly.
3. Connect earth wires to their corresponding terminals.
4. Pull wires to ensure they are securely latched, then retain them with a wire retainer.
5. For adapter system connections, run the remote control cable and attach the S21 (refer to Section 5).
6. Shape wires so the service lid fits securely, then close the lid.

Diagram: Shows a terminal block, electrical component box, wire retainer, and wiring connections for indoor and outdoor units, emphasizing secure connections and proper wire management.

WARNING:

• Do not use tapped wires, stranded wires, extension cords, or starburst connections, as they may cause overheating, electrical 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. When connecting to a wired remote controller:

If workspace is available on the right side of the indoor unit, the electrical component box can remain attached. Omit steps for removing and installing the box for efficiency.

5-1. Remove the front grille (2 screws).

5-2. Remove the service lid (1 screw).

5-3. Remove the cover from the indoor unit electrical component box.

Diagram: Shows how to disengage tabs to remove the cover of the indoor unit's electrical component box.

* 5-4. Remove the indoor unit electrical component box:

1. Remove the flap.
2. Disconnect the communication wiring.
3. Disconnect the connector (S200).
4. Remove the thermistor from the heat exchanger.
5. Remove the electrical component box installation screw (1 screw).

Indoor Unit Installation (Continued)

5-5. Prepare the accessory (separate product):

1. Remove the accessory cover.
2. Insert the connection cord into connector "S21" (white) in the accessory.
3. Route connection cords through accessory cut-outs and reinstall the cover.
4. Insert the accessory connector into connector "S403" in the indoor unit electrical component box. Route the connection cord through the box's cut-out.

Diagram: Illustrates preparing an accessory, showing connector "S21" and routing cords through cut-outs.

5-6. Install the cover of the electrical component box in its original position.

5-7. Install the accessory (separate product):

1. Install the accessory into the indoor unit electrical component box.
2. Route the connection cord as shown.

Diagram: Shows installing the accessory and routing the connection cord through cut-outs for the "S403" connection.

* 5-8. Install the indoor unit electrical component box in its original position:

1. Install the flap.
2. Install the electrical component box (1 screw).
3. Install the thermistor in its original position on the heat exchanger.
4. Install the connector (S200) in its original position.
5. Connect the communication wiring in its original position.

5-9. Install the front grille in its original position (2 screws).

5-10. Install the service lid (1 screw).

6. Drain piping.

1. Connect the drain hose as described. Ensure the drain hose is inclined downward and the end is not submerged in water. No trap is permitted.
2. Remove air filters and pour water into the drain pan to check for smooth water flow.
3. If drain hose extension or embedded drain piping is required, use appropriate parts matching the hose front end.
4. When extending the drain hose, use a commercially available extension hose with a 16mm inner diameter. Thermally insulate the indoor section of the extension hose.
5. When connecting a rigid polyvinyl chloride pipe (13mm diameter) directly to the drain hose, use a commercially available 13mm drain socket as a joint.

Diagram: Illustrates correct drain hose inclination, extension hose connection with insulation, and connection to a PVC pipe using a drain socket.

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 chips from entering the pipe.
3. Place the flare nut on the pipe.
4. Flare the pipe.
5. Check that the flaring is properly made, ensuring the inner surface is flaw-free and the pipe end is evenly flared in a perfect circle. Ensure the flare nut is fitted.

Diagram: Shows the process of flaring a pipe end using different types of flare tools and checking the quality of the flare.

WARNING:

• Do not use mineral oil on the flared part.
• Prevent mineral oil from entering the system, as it reduces unit lifetime.
• Never use piping from previous installations; only use parts delivered with the unit.
• Do not install a drier with this R410A unit.
• Drying material may dissolve and damage the system.
• Incomplete flaring may cause refrigerant gas leakage.

2. Refrigerant piping:

CAUTION:

1. Use the flare nut fixed to the main unit to prevent cracking.
2. Apply refrigeration oil (for R410A) only to the inner surface of the flare to prevent gas leakage.
3. Use torque wrenches when tightening flare nuts to prevent damage and gas leakage.

Align the centers of both flares and tighten flare nuts by hand for 3-4 turns, then fully tighten with torque wrenches.

Diagram: Illustrates applying oil to the inner flare surface and using a torque wrench for tightening.

Flare nut tightening torque:

• Gas side (3/8 inch): 32.7-39.9 N·m (330-407 kgf·cm)
• Liquid side (1/4 inch): 14.2-17.2 N·m (144-175 kgf·cm)

2-1. Caution on piping handling:

1. Protect open pipe ends against dust and moisture.
2. Bend pipes gently, using a pipe bender.

2-2. Selection of copper and heat insulation materials:

When using commercial copper pipes and fittings:

1. Insulation material: Polyethylene foam with a heat transfer rate of 0.041 to 0.052 W/mK. Ensure it withstands the refrigerant gas pipe's surface temperature (up to 110°C max).
2. Insulate both gas and liquid piping with appropriate dimensions:
• Gas pipe: O.D. 9.5mm, minimum bend radius 30mm or more, thickness 0.8mm.
• Liquid pipe: O.D. 6.4mm, minimum bend radius 30mm or more, thickness 0.8mm.
• Gas pipe thermal insulation: I.D. 12-15mm, thickness 10mm Min.
• Liquid pipe thermal insulation: I.D. 8-10mm, thickness 10mm Min.
3. Use separate thermal insulation pipes for gas and liquid refrigerant pipes.

Diagram: Shows pipe insulation, including gas and liquid pipes, insulation dimensions, and finishing tape application.

Trial Operation and Testing

1. Trial operation and testing:

1. Measure supply voltage to ensure it is within the specified range.
2. Perform trial operation in either cooling or heating mode. Select the lowest programmable temperature for cooling and the highest for heating.
3. Trial operation may be disabled based on room temperature. Use the remote controller for trial operation.
4. After trial operation, set the temperature to a normal level (26-28°C cooling, 20-24°C heating).
5. The system has a 3-minute restart protection after being turned off.
6. Carry out test operations according to the Operation Manual to ensure all functions, like louver movement, are working correctly.

The air conditioner consumes minimal power in standby mode. Shut off the circuit breaker if the system will not be used for an extended period.

If the circuit breaker trips, the system will restore its original operation mode when power is restored.

Trial operation from remote controller:

1. Press the ON/OFF button.
2. Simultaneously press the center of the TEMP button and the MODE button.
3. Press the MODE button twice. A symbol (e.g., '7') will appear on the display indicating Trial Operation mode.
4. Trial run mode lasts approximately 30 minutes before switching to normal mode. To quit early, press the ON/OFF button.

2. Test items:

Check the following during installation:

• Test Item: Indoor and outdoor units installed properly on solid bases. Symptom: Fall, vibration, noise.
• Test Item: No refrigerant gas leaks. Symptom: Incomplete cooling/heating function.
• Test Item: Refrigerant gas and liquid pipes and indoor drain hose extension are thermally insulated. Symptom: Water leakage.
• Test Item: Draining line is properly installed. Symptom: Water leakage.
• Test Item: System is properly earthed. Symptom: Electrical leakage.
• Test Item: Specified wires used for interconnecting wire connections. Symptom: Inoperative or burn damage.
• Test Item: Indoor or outdoor unit's air intake or exhaust has clear path of air. Symptom: Incomplete cooling/heating function.
• Test Item: Stop valves are opened. Symptom: Inoperative.
• Test Item: Indoor unit properly receives remote controller commands. Symptom: Inoperative.

Diagram: Shows the button sequence for initiating trial operation on the remote controller.

Manufacturer Information

DAIKIN INDUSTRIES CZECH REPUBLIC s.r.o.
U Nove hospody 1/1155, 301 00 Plzen Skvrnany, Czech republic

DAIKIN EUROPE NV
Zandvoordestraat 300, B-8400 Ostende, Belgium
www.daikineurope.com

Document Reference: 3P291651-2