Daikin FDQ125B8V3B Installation Manual Download

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FDYP125~2 FDQ125~250B8V3B
Split System air conditioners
4PW23694-1A

Installation manual

RAIN

CHECK

Make sure that the drain hose is firmly connected. Put some water
into the drain pan to check if the water flows smoothly.

IELD

WIRING

General instructions

■

Use copper wiring only.

■

Follow the "Wiring diagram" attached to the switchbox cover to
wire the outdoor unit, indoor units and remote controller. For
details on hooking up the remote controller, refer to the
"installation of the remote controller". For electric wiring work
also refer to

"Internal wiring - parts table" on page 6

■

A circuit breaker capable of shutting down the power supply to
the entire system must be installed.

■

Be sure to use a dedicated power circuit (a power supply not
shared by another appliance).

■

Refer to the installation manual attached to the outdoor unit for
the size of the power supply electric wire connected to the
outdoor unit, the capacity of the circuit breaker and switch, and
wiring instructions.

■

Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following
instructions.
-

Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)

When connecting wires of the same gauge, connect them in
accordance with the figure below.

■

Do not connect wires of different gauges to the same grounding
terminal. Looseness in connection may deteriorate the
protection.

■

Use only specified wires and tightly connect wires to the
terminals. Be careful that wires do not place external stress on
the terminals. Keep wiring in neat order so that they do not
obstruct other equipment such as popping open the switchbox
cover. Make sure that the cover closes properly. Incomplete
connections could result in overheating, and in the worse case,
electric shock or fire.

■

Use the correct screwdriver to tighten the terminal screws. Small
screwdrivers can damage the screw head and prevent
appropriate tightening.
Over-tightening the terminal screws can damage the screws.
The standard tightening torque is 0.9 N•m.

Electrical characteristics

For details, refer to "Electrical data".

Specifications for field wire

Precautions on electrical wiring work

■

Before obtaining access to terminal devices, all supply circuits
must be interrupted.

■

Do not turn on the main switch until all the wiring is completed.
Make sure that the main switch has a contact separation of at
least 3 mm in all poles.

Methods of wiring units and connecting remote
controller cords

(See figure 6)

■

Wiring the units (power supply wiring)

■

Connect the interconnection wiring (from outdoor to indoor) to
the 1-2-3 terminal (1) using a separate power supply of the
indoor unit fan motor to the L-N terminal.

■

Remote controller code.
Connect the cords to the remote controller terminal (P1,P2) (No
polarity) (2).

Precautions

■

Do not clamp remote controller cords together with the other
wiring. Doing so may cause malfunction.

■

Do not place the controller where it is exposed to direct sunlight.
The LCD display may get discolored, failing to display the data.

■

Remote controller cords and wires connecting the units should
be located at least 50 mm from other electric wires. Not following
this guideline may result in malfunction.

If proper drainage is not carried out from the outdoor drain
pipes during air conditioning operation, chances are that
the pipe is clogged with dust and dirt. This may result in
water leakage from the indoor unit. Under such
circumstances, stop operation of the air conditioner and
consult your dealer or air conditioner service station.

■

All wiring must be performed by an authorised
electrician.
All components procured on the site and all electric
construction should comply with the applicable local
and national codes.

■

High voltage
In order to avoid electric shock, make sure to
disconnect the power supply 1 minute or more before
servicing the electrical parts. Even after 1 minute,
always measure the voltage at the terminals of main
circuit capacitors or electrical parts and, before
touching, make sure that those voltages are 50 V DC
or less.

■

In order to avoid electric shock, make sure that an
earth leakage breaker is installed.

■

Be sure the air conditioner is electrically earthed.
In order to avoid electric shock, make sure that the
unit is grounded and that the earth wire is not
connected to a gas or water pipe, lightning conductor
or telephone earth wire.

■

Never replace a fuse with that of a different ampere
rating or other wires when a fuse blows.
This may cause the unit to break down or cause a fire.

■

When connecting or disconnecting a power supply
cord, make sure that the current-carrying conductors
become taut before the earthing conductor.

Wire

Size (mm

)

Length

Between

indoor units

H05VV-U4G

(1),(2)

(1) Shows only in case of protected pipes. Use H07RN-F in case of no protection.
(2) Run transmission wiring between the indoor and outdoor units through a conduit

to protect against external forces, and feed the conduit through the wall together
with refrigerant piping.

—

Unit - remote

controller

Sheathed wire

(2 wire)

(3)

(3) Use double insulation wire for remote controller (sheath thickness:

≥

1 mm) or run

wires through a wall or conduit so that the user cannot come in contact with them.

0.75–1.25