Fujitsu 9RLS3H Installation Manual page 4

5.2. HOW TO CONNECT THE WIRE TO THE TERMINALS
(1) Use ring terminals with insulating sleeves as shown in the fi gure below to connect to
the wire.
(2) Securely crimp the ring terminals to the wires using an appropriate tool so that the
wires do not come loose.
(3) Use the specifi ed wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screw-
driver that is too small, otherwise, the screw heads may be damaged and prevent the
screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Tightening torque
M3.5 screw 0.8 to 1.0 N • m
M4 screw 1.2 to 1.8 N • m
M5 screw 2.0 to 3.0 N • m
Strip
10 mm
Screw with special washer
Wire
Ring terminal
Terminal board
Terminal block
Screw with special washer
Match the terminal block numbers and connection cable colors with those of the outdoor
unit or branch box. Incorrect wiring may cause a fi re.
Connect the connection cables fi rmly to the terminal block. Imperfect installation may
cause a fi re.
When fi xing the connection cable with the cable clamp, always fasten the cable at the
plastic jacket portion, but not at the insulator portion. If the insulator is chafed, electric
leakage may occur.
Do not use an earth screw for an external connector. Only use for interconnection
between two units.
Be careful not to generate a spark as follows for using a fl ammable refrigerant.
• Do not remove the fuse while power is on.
• Do not disconnect plug from the wall outlet and the wiring while the power is on.
• It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.
5.3. Outdoor unit wiring
When connecting the power supply cable, make sure that the phase of the power
supply matches with the phase of the terminal board. If the phases do not match, the
compressor will rotate in reverse and will not be able to compress.
(1) Remove the tapping screw, then remove the control box cover.
(2) Fasten the Inter-unit wire harness and power supply to the conduit holder using
the lock nut.
(3) Connect inter-unit wire harness and power supply to the terminal.
(4) Use the tapping screw to install the control box cover.
NOTE:
• Connector trade size for this unit is 1/2"(12.7 mm). The connector
can be bought at a hard ware store. Refer to "How to connect
wiring to the terminals" for instructions on connecting depending
on the wire type you are using.
• The fuse located in the outdoor unit provides power supply pro-
tection and may blow when power is applied if the system has
been in correctly wired.
En-4
Ring terminal
Sleeve
Ring terminal
Wire
CAUTION
CAUTION
Lock nut
Keep the earth wire longer than the other wires.
Earth wire
Indoor unit
Terminal
G
3
2
1
DISCONNECT
SWITCH (Locally procured)
Indoor unit terminal block
Earth
1 2 3 4
(Ground) screw
Connection cable
G
NOTE:
Factory installed protective inline fuses for indoor units' conductors are installed on the
Power Supply PCB.
5.4. Connecting the piping
CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional installation set or pro-
cured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the fl are surface and tightening the nut hand tight,
tighten the nut to the specifi ed tightening torque with a torque wrench. (Table 1)
FLARING
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove the
burrs.
(3) Insert the fl are nut onto the pipe and fl are the
pipe with a fl aring tool.
Insert the fl are nut (always use the fl are nut attached
to the indoor and outdoor units respectively) onto
the pipe and perform the flare processing with a
fl are tool.
Use the special R410A fl are tool, or the R22 fl are
tool.
When using the conventional fl are tool, always use
an allowance adjustment gauge and secure the A
dimension shown in table 2.
Control box cover
Tapping screw
Conduit connector
Power supply
Inter-unit wire
harness
Power supply cable
or connection cable
Outdoor unit
Earthing
(Grounding) Terminal
line
G
G
L2
Control line
L1
3
2
1
(Inter Unit)
Power line
Outdoor unit terminal block
Earth
1 2 3 L1 L2
G
(Ground) screw
G
Power supply cable
Check if [L] is fl ared uniformly and
is not cracked or scratched.
Die
Pipe
A