Daikin Installation Manual

Introduction

This manual provides detailed instructions for the installation of Daikin Split System air conditioners, models FFQ25B7V1B, FFQ35B7V1B, FFQ50B7V1B, and FFQ60B7V1B. Please read these instructions carefully before installation and keep this manual in a handy place for future reference.

Important Safety Note: Improper installation or attachment of equipment or accessories can result in electric shock, short-circuit, leaks, fire, or other damage. Ensure only Daikin-approved accessories are used and installation is performed by a qualified professional. If unsure about any procedure, contact your Daikin dealer.

Refrigerant Caution: This unit uses refrigerant series R-410A. Ensure connectable outdoor units are designed exclusively for R-410A.

Before Installation

When moving the unit from its carton box, lift it by the four lifting lugs only, avoiding pressure on parts like the swing flap, refrigerant piping, drain piping, or resin parts. Keep the unit in its packaging until reaching the installation site. If unpacking is unavoidable, use soft slings or protective plates with a rope to prevent damage or scratches. Do not remove the switch box cover until the unit is suspended.

Precautions for Installation Location

• Do not install or operate the unit in rooms with:
  • Mineral oil, oil vapor, or spray (e.g., kitchens) as plastic parts may deteriorate.
  • Corrosive gases (e.g., sulphurous gas) as copper tubing and brazed spots may corrode.
  • Volatile flammable gases (e.g., thinner, gasoline).
  • Machines generating electromagnetic waves (control system may malfunction).
  • High salt content air (e.g., near the ocean) or areas with significant voltage fluctuations (e.g., factories).
  • Vehicles or vessels.
• When selecting the installation site, use the supplied paper pattern for installation.
• Do not install accessories directly on the casing, as drilling holes may damage electrical wires and cause fire.

Included Accessories

Check if the following accessories are included with your unit (See Figure 1):

• 1. Drain hose
• 2. Metal clamp
• 3. Washer for hanger bracket
• 4. Paper pattern for installation
• 5. Screws (M5) for paper pattern for installation
• 6. Insulation for gas pipe fitting
• 7. Insulation for liquid pipe fitting
• 8. Large sealing pad
• 9. Small sealing pad
• 10. Sealing material
• 11. Installation manual and operation manual

Optional Accessories

Two types of remote controllers are available: wired and wireless. Select one based on customer request and install it in an appropriate location. Consult catalogues and technical literature for selection. A decoration panel is also required for this indoor unit.

Installation Checklist

Take special care during construction and check after installation is finished:

Notes to the Installer

Read this manual carefully for correct installation. Instruct the customer on proper operation using the enclosed operation manual. Explain the installed system and fill out the installation specifications in the outdoor unit operation manual.

Selecting Installation Site

General Conditions

Select a site that meets the customer's approval and fulfills these conditions:

• Ensures optimum air distribution.
• Has no obstructions to air passage.
• Allows proper condensate water drainage.
• Has a false ceiling that is not noticeably inclined.
• Provides sufficient clearance for maintenance and service.
• Allows piping between indoor and outdoor units within the allowable limit (refer to outdoor unit manual).
• Keeps indoor unit, outdoor unit, power supply wiring, and transmission wiring at least 1 meter away from televisions and radios to prevent image interference and noise.

Ceiling Height

Install the unit where the bottom panel height is more than 2.5 m to prevent users from easily touching it.

Additional Insulation

If ceiling conditions exceed 30°C and 80% relative humidity, or if fresh air is inducted into the ceiling, additional insulation (minimum 10 mm polyethylene foam) is required.

Air Flow Directions

This unit offers different air flow directions. An optional blocking pad kit may be required for 2 or 3-direction discharge. Refer to the kit's manual and the 'Field setting' section for details. (See Figure 2)

• 1. Air discharge in 4 directions
• 2. Air discharge in 3 directions
• 3. Air discharge in 2 directions

Space Requirements

Refer to Figure 6 for installation space requirements. Ensure at least 200 mm clearance on sides where the air outlet is closed.

• 1. Air inlet
• 2. Air outlet

Preparations Before Installation

Ceiling Opening and Suspension Bolt Position

(See Figure 7)

• Decoration panel dimensions
• Ceiling opening dimensions
• Indoor unit dimensions
• Suspension bolt pitch dimensions
• Refrigerant piping
• Suspension bolt (x4)
• False ceiling
• Hanger bracket

Note: Installation is possible with a 660 mm ceiling dimension. For a 20 mm ceiling panel overlap, the spacing between the ceiling and unit should be 45 mm or less. If over 45 mm, use sealing material or recover the ceiling. (See Figure 3)

• 1. Sealing material
• 2. False ceiling

Ceiling Opening Creation

(For existing ceilings)

• Refer to the paper pattern for installation for ceiling opening dimensions.
• Create the opening and route refrigerant, drain piping, and remote controller wiring (if applicable) from the opening to the casing outlet.
• Reinforce ceiling beams if necessary to maintain level and prevent vibration. Consult a builder for details.

Suspension Bolt Installation

(Use M8~M10 size bolts. Use anchors for existing ceilings; sunken inserts/anchors for new ceilings.) Adjust clearance from the ceiling before proceeding. (See Figure 4)

• 1. Ceiling slab
• 2. Anchor
• 3. Long nut or turn-buckle
• 4. Suspension bolt
• 5. False ceiling

Note: All suspension parts are field supplied. For non-standard installations, contact your Daikin dealer.

Indoor Unit Installation

Optional accessories may be easier to install before the indoor unit. For existing ceilings, install fresh air inlet kits and branch ducts first.

1. Temporary Indoor Unit Installation

• Attach the hanger bracket to the suspension bolt, securing it with nuts and washers from both sides. (See Figure 5)
• 1. Nut (field supply)
• 2. Hanger bracket
• 3. Washer (supplied)
• 4. Tighten (double nut)

2. Fix the Paper Pattern for Installation

(For new ceilings only)

• The paper pattern matches ceiling opening measurements. Consult a builder.
• The pattern indicates the center of the opening and the unit.
• Attach the pattern to the unit using the provided screws after removing its packaging. (See Figure 8)
• 1. Paper pattern (supplied)
• 2. Screws (supplied)

3. Adjust Unit Position

(See "Preparations before installation" on page 2.)

4. Check Leveling

• Do not install the unit tilted. The built-in drain pump and float switch may malfunction, causing water to drip.
• Check leveling at all four corners using a water level or water-filled vinyl tube. (See Figure 9)
• 1. Water level
• 2. Vinyl tube

5. Remove Paper Pattern

(For new ceilings only.)

Refrigerant Piping Work

All field piping must be done by a licensed refrigeration technician according to local and national codes.

• Refer to the outdoor unit's installation manual for outdoor unit piping.
• Execute complete heat insulation on both gas and liquid pipes to prevent water leakage. Use insulation resistant to high temperatures (up to 120°C for heat pumps). For areas with high temperature/humidity (over 30°C or 80% RH), use thicker insulation (20 mm+).
• Before rigging, check the refrigerant type. Use appropriate pipe cutters and flares. Apply ether or ester oil to flare portions before connecting. Pinch or tape tube ends to prevent dust/moisture entry. Use copper alloy seamless pipes (ISO 1337).
• The outdoor unit is pre-charged with refrigerant.
• Use both a spanner and torque wrench for connecting/disconnecting pipes.
• 1. Torque wrench
• 2. Flare nut
• 3. Piping union
• 4. Spanner

Important: Do not mix any other substance (like air) into the refrigerant circuit.

Flare Nut Tightening Torque:

Note (Emergency): If a torque wrench is unavailable, tighten the flare nut by hand until it stops, then further tighten by the specified angle.

When connecting flare nuts, coat them with ether/ester oil and hand-tighten 3-4 turns before firm tightening.

Check pipe connectors for gas leaks and insulate as shown in Figure 10.

• 1. Liquid pipe
• 2. Gas pipe
• 3. Insulation for liquid line fitting (supplied)
• 4. Insulation for gas line fitting (supplied)
• 5. Clamps (2 per insulation)
• 6. Small sealing pad (supplied)

Wrap the sealing pad around the insulation for the gas piping joints only.

Important: Insulate all field piping up to the connection inside the unit. Exposed piping can cause condensation or burns.

Warning: If refrigerant gas leaks, ventilate the area. Refrigerant gas exposed to fire can emit toxic fumes. Ensure no refrigerant leaks after work is completed, as leaks exposed to flames can produce toxic gas.

Drain Piping Work

Rig the drain piping as shown in the figure and take measures against condensation. Improperly rigged piping can cause leaks and damage.

Installation:

• Keep piping as short as possible and slope downwards to prevent air traps.
• Use pipe size equal to or greater than the connecting pipe (PVC, nominal diameter 20 mm, outer diameter 26 mm).
• Insert the drain hose into the drain socket up to the base and tighten with a clamp. Ensure the screw head is less than 4 mm from the hose.
• 1. Metal clamp (supplied)
• 2. Grey tape (field supply)
• 3. Drain hose (supplied)
• Insulate the drain hose indoors.
• If the hose cannot be sloped sufficiently, use drain raising piping (field supply).

Condensation Prevention:

• Ensure heat insulation on the indoor drain pipe and drain socket to prevent water leakage due to condensation.
• Wrap the supplied sealing pad over the clamp and drain hose.

Piping Diagram (See Figure 14):

• 1. Ceiling slab
• 2. Hanger bracket
• 3. Drain raising pipe
• 4. Raising section
• 5. Drain hose (supplied)
• 6. Metal clamp (supplied)

Precautions:

• Install drain raising pipes at a height less than 545 mm and at a right angle to the indoor unit, no more than 300 mm from it.
• The incline of the attached drain hose should be 75 mm or less.
• Ensure a downward slope of 1:100 by installing hanging bars every 1 to 1.5 m.
• When unifying multiple drain pipes, use converging drain pipes suitable for the unit's capacity. (See Figure 11)
• 1. T-joint converging drain pipes

Checking Drainage:

• After piping, check for smooth drainage. Open the water inlet lid, add approximately 2 L of water gradually, and check flow. (See Figure 12)
• 1. Drain pipe
• 2. Service drain outlet with rubber plug
• 3. Plastic container for pouring

Drain Piping Connections:

• Do not connect directly to sewage pipes that smell of ammonia, as it can corrode the heat exchanger.
• Ensure the drain pipe is not blocked by collected water.

Check drainage flow during COOL running in the "Test operation" section.

Electric Wiring Work

General Instructions

• All field-supplied parts and materials must conform to local codes.
• Use only copper wire.
• Follow the 'Wiring diagram' attached to the unit for wiring outdoor, indoor units, and the remote controller. Refer to the remote controller's installation manual for its setup.
• All wiring must be performed by an authorized electrician.
• Install a circuit breaker capable of shutting down the entire system.
• Note that the system may restart automatically if the main power is turned off and on.
• Refer to the outdoor unit's installation manual for power supply wire size, circuit breaker capacity, and wiring instructions.
• Ensure the air conditioner is properly grounded.
• Do not connect the ground wire to gas pipes, water pipes, lightning rods, or telephone ground wires, as this can cause explosions, fires, or electrical hazards.

Electrical Characteristics

Refer to "Electrical data" for details.

Specifications for Field Wire

(1) Use H07RN-F if pipes are not protected. (2) Run transmission wiring through a conduit to protect against external forces. (3) For European/Asian markets: insulated thickness 1 mm+. For Australian market: Shield wire, insulated thickness 1 mm+. (4) Total extended length for group control systems.

Wiring Example and Remote Controller Setup

(See Figure 22)

• A. Wiring remote controller cord
• B. Wiring between units
• C. Connecting power supply terminal block (4P) with ground wire
• D. Attaching sealing material

Components:

• 1. Control box lid
• 2. Wiring diagram label
• 3. Remote controller cord (Ground shield part)
• 4. Terminal block for remote controller (6P)
• 5. Wiring between units
• 6. Power supply terminal block
• 7. Big clamp (field supply)
• 8. Small clamp (field supply)
• 9. Clamp material
• 10. Outdoor unit
• 11. Indoor unit
• 12. Sealing material (supplied)
• 13. Wiring to outside
• 14. Outside
• 15. Inside

Wiring Between Units and Ground Wire

Remove the control box lid. Connect wires to the power supply terminal block (4P) and the ground terminal. Route wires through the hole and secure with a clamp. Leave sufficient slack (approx. 80 mm). Connect remote controller wires to the 6P terminal block (no polarity). Secure the remote controller cord with a clamp. Attach sealing material (D) to prevent water/insect infiltration, which could cause short circuits.

Wiring Precautions

• Observe notes when wiring to the power supply terminal board.
• Do not connect wires of different gauges to the same terminal (may cause overheating).
• When connecting same gauge wires, follow the figure. Use specified wire, connect securely, and do not overtighten (torque: 1.31 N•m±10%).
• Total current of crossover wiring between indoor units should be less than 12 A. Use sheathed branches for wiring over 2 mm² (Ø1.6).
• Do not connect different gauge wires to the same grounding terminal.
• Locate remote controller cords at least 50 mm away from power supply wiring to prevent electrical noise malfunction.
• Refer to the remote controller's manual for its specific wiring.
• Never connect power supply wiring to the transmission wiring terminal board; this can damage the system.
• Use specified wires, connect tightly, and keep wiring neat to avoid obstructing equipment. Incomplete connections can lead to overheating, shock, or fire.

Wiring Examples

For outdoor unit wiring, refer to its installation manual.

Confirm System Type:

• Pair type/Multi system: 1 remote controller controls 1 indoor unit. (See Figure 18)
• Multi system: 1 to 4 indoor units to 1 outdoor unit. Each indoor unit controlled by its connected remote controller. Group control is not standard. (See Figure 19)
• Group control: 1 remote controller controls up to 16 indoor units. All operate according to the remote controller. (See Figure 20)
• 2 Remote Controller Control: 2 remote controllers control 1 indoor unit. (See Figure 21)

Figures 18, 19, 20, 21 Components:

• 1. Main power supply
• 2. Main switch
• 3. Fuse
• 4. Outdoor unit
• 5. Indoor unit
• 6. Remote controller (optional)
• 7. Master indoor unit
• 8. Slave indoor unit

Note: For group control, indoor unit addresses are set automatically upon activation; no manual designation is needed.

Wiring Precautions (Continued)

• All transmission wiring (except remote controller) is polarized and must match terminal symbols.
• For group control, wire the remote controller to the master unit for simultaneous operation.
• Select a group control remote controller compatible with the indoor unit having the most functions.
• Do not ground on gas pipes, water pipes, lightning rods, or telephone grounds.
• If using shielded wire, ground the shield to the remote controller terminal board or a grounded metal part.

Field Setting

Field settings must be made from the remote controller based on installation conditions. This involves changing "Mode number", "FIRST CODE No.", and "SECOND CODE No.". Refer to the remote controller's installation manual for details.

Setting Air Discharge Direction

For 2 or 3-direction discharge, refer to the optional blocking pad kit's handbook. The default factory setting (SECOND CODE No. "01") is for 4-direction discharge.

Settings for Options

Refer to the installation instructions provided with each option.

Setting Air Filter Sign

Remote controllers display an air filter cleaning reminder. Change the SECOND CODE No. based on room dust levels (factory default "01" is for light contamination).

Wireless Remote Controllers: Address setting is required. Refer to the wireless remote controller's installation manual.

Control by 2 Remote Controllers

(Controlling 1 indoor unit by 2 remote controllers)

When using two remote controllers, one must be set to "MAIN" and the other to "SUB".

Main/Sub Changeover

1. Insert a screwdriver into the recess between the upper and lower parts of the remote controller and pry off the upper part. (See Figure 13) (The PC board is attached to the upper part.)
2. Turn the main/sub changeover switch on one of the remote controller PC boards to "S". (See Figure 16) Leave the other switch set to "M".
3. 1. Remote controller PC board
4. 2. Factory setting
5. 3. Only one remote controller needs to be changed.

Installation of the Decoration Panel

Read the "Test operation" chapter (page 7) before making a test run without the decoration panel. Refer to the decoration panel's installation manual. Ensure there are no gaps between the unit body and the panel after installation, as air leakage can cause condensation.

Test Operation

Ensure control box lids are closed on both indoor and outdoor units. Refer to "For the following items, take special care..." on page 2. After completing piping and wiring, conduct test operation.

Test Operation After Installing Decoration Panel

1. Open the gas side stop valve.
2. Open the liquid side stop valve.
3. Electrify the crank case heater for 6 hours.
4. Set to cooling operation via remote controller and start by pressing ON/OFF.
5. Press Inspection/Test Operation button 4 times (2 times for wireless remote) and operate in Test Operation mode for 3 minutes.
6. Press the air flow direction adjust button to confirm operation.
7. Press Inspection/Test Operation button and operate normally.
8. Confirm unit function as per the operation manual.

Test Operation Before Installing Decoration Panel

1. Open the gas side stop valve.
2. Open the liquid side stop valve.
3. Electrify the crank case heater for 6 hours.
4. Set to cooling operation with the wired remote controller and start by pressing ON/OFF. "A7" will appear on the display.
5. Press Inspection/Test Operation button on the remote controller and operate in Test Operation mode for 3 minutes.
6. Press Inspection/Test Operation button and operate normally.
7. Confirm unit function as per the operation manual.
8. Turn off the main power supply after operation.

Precautions

• Refer to the outdoor unit's manual for Individual Operation System types.
• Conduct test operation after installing the decoration panel if using a wireless remote controller.

Wiring Diagram

Field Wiring Symbols

• FIELD WIRING: Dashed line
• TERMINAL: Square symbol
• CONNECTOR: Rounded square symbol
• PROTECTIVE EARTH (SCREW): Symbol with lines

Wire Colors

• BLK: BLACK
• GRN: GREEN
• RED: RED
• WHT: WHITE
• YLW: YELLOW

Component Designations

• Printed Circuit Board: A1P, A3P, A4P
• Capacitor (Fan Motor): C1
• Fuse: F1U (250 V/5 A)
• Light Emitting Diode: HAP (Service Monitor - Green), H1P (On - Red), H2P (Timer - Green), H3P (Filter Sign - Red), H4P (Defrost - Orange)
• Magnetic Relay (Drain Pump): KPR
• Motor: M1F (Indoor Fan), M1P (Drain Pump), M1S (Swing Flap)
• Thermo Switch: Q1M (M1F Embedded)
• Thermistor: R1T (Air), R2T (Coil-1), R3T (Coil-2)
• Signal Receiver Circuit: RC
• Float Switch: S1L
• Transformer: T1R (220~240 V, 22 V)
• Signal Transmission Circuit: TC
• Phase Control Circuit: V1TR
• Terminal Strip: X1M, X2M
• Selector Switch: SS1 (Main/Sub), SS2 (Wireless Address Set)
• On/Off Button: BS1
• Connectors for Optional Parts: X33A (Adaptor for Wiring), X35A (Group Control Adaptor), X40A (Remote On/Off, Forced Off), X60A, X61A (Interface Adaptor for Sky Air Series)

Connections to Outdoor Unit

• In case of simultaneous operation system: (Symbol ':')
• Indoor Unit (Master): (Symbol ':')
• Indoor Unit (Slave): (Symbol ':')
• Remote Controller: (Symbol ':')
• Wired Remote Controller: (Symbol ':')
• Switch Box: (Symbol ':')
• Color of PCB Connector: (Symbol ':')
• Color of Wire: (Symbol ':')
• (Marked) Color of Wire Connector: (Symbol ':')
• Colour: (Symbol ':')

Notes on Wiring Diagram

1. For central remote controller connection, see its manual.
2. X24A is used when a wireless remote controller kit is installed.
3. Remote controller models vary by system combination; consult technical data before connecting.
4. When using shielded wire, ground the shield of the remote controller cord to the indoor unit.

Declaration of Conformity

Daikin Europe N.V. declares under its sole responsibility that the air conditioning models FFQ25B7V1B, FFQ35B7V1B, FFQ50B7V1B, and FFQ60B7V1B are in conformity with the following directives, provided they are used in accordance with the instructions:

• Low Voltage Directive 73/23/EEC
• Machinery Safety Directive 98/37/EEC
• Electromagnetic Compatibility Directive 89/336/EEC

This conformity is based on the Technical Construction File Daikin.TCF.021 and has been positively judged by KEMA according to Certificate 2024351-QUA/EMC02-4565.

This declaration is made in multiple languages, including English, German, French, Dutch, Spanish, Italian, Greek, Portuguese, Russian, Danish, Swedish, Norwegian, Finnish, Czech, Croatian, Hungarian, Polish, Romanian, Slovenian, Estonian, Bulgarian, Lithuanian, Latvian, and Slovak.

Manufacturer Information

DAIKIN EUROPE NV
Zandvoordestraat 300, B-8400 Oostende, Belgium

Director Quality Assurance, Jiro Tomita
Ostend, 2nd of November 2004