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[Installing the indoor unit]
• Hang the indoor unit from the hooks at the top of the wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate
the bottom of the indoor unit from the wall.
Bottom hooks
• After hooking the indoor unit to the top hook, hook the fi ttings of the indoor unit to the
bottom hooks while lowering the unit and pushing it against the wall.
6.6. Pipe connection
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a fl ame.
6.6.1. Flaring
Use special pipe cutter and fl are tool designed for R410A or R32 pipework.
(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 any burrs.
(3) Insert the fl are nut (always use the fl are nut attached to the indoor unit(s) and outdoor
unit or branch box respectively) onto the pipe and perform the fl are processing with a
fl are tool. Use the special R410A or R32 fl are tool, or the conventional fl are tool. Leak-
age of refrigerant may result if other fl are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Die
A
Pipe
Pipe outside diameter
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
When using conventional fl are tools to fl are R32 pipes, the dimension A should be approx-
imately 0.5 mm more than indicated in the table (for fl aring with R32 fl are tools) to achieve
the specifi ed fl aring. Use a thickness gauge to measure the dimension A.
Width across
Pipe outside diameter [mm (in.)]
flats
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
6.6.2. Bending pipes
• To prevent breaking of the pipe, avoid sharp bends.
• If the pipe is bent repeatedly at the same place, it will break.
• The pipes are shaped by your hands. Be careful not to collapse them.
• Bend R70 mm or more with a pipe bender.
• Do not bend the pipes in an angle more than 90°.
• When pipes are repeatedly bend or stretched, the material will harden, making it diffi cult
to bend or stretch them anymore.
• Do not bend or stretch the pipes more than 3 times.
• When bending the pipe, do not bend it as
is. The pipe will be collapsed. In this case,
cut the insulating pipe with a sharp cutter
as shown on the right, and bend it after
exposing the pipe. After bending the pipe
as you want, be sure to put the heat insu-
lating pipe back on the pipe, and secure it
with tape.
En-6
Top hooks
Indoor unit
Wall hook bracket
Bottom hooks
CAUTION
Check if [L] is flared uniformly
and is not cracked or scratched.
B
L
Dimension A [mm]
Flare tool for R32,
Dimension B [mm]
clutch type
0 to 0.5
Width across flats
of Flare nut [mm]
CAUTION
Pipe
Insulating
Pipe
Cutter
Cut line
6.6.3. Flare connection
The fl are connection shall not be performed indoors.
(Spacer)
• Be sure to install the pipe against the port on the indoor unit correctly. If the center-
ing is improper, the fl are nut cannot be tightened smoothly. If the fl are nut is forced
to turn, the threads will be damaged.
• Do not remove the fl are nut from the indoor unit pipe until immediately before con-
necting the connection pipe.
• Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order
to tighten the fl are nut correctly.
• Tighten the fl are nuts with a torque wrench using the specifi ed tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a fl ame.
• Connect the piping so that the control box cover can easily be removed for servic-
ing when necessary.
• In order to prevent water from leaking into the control box, make sure that the pip-
ing is well insulated.
When the flare nut is tightened properly by your hand, hold the body side coupling with a
wrench, then tighten with a torque wrench. (See the following table for the flare nut tighten-
ing torques.)
Indoor unit pipe
(Body side)
Flare nut [mm (in.)]
Do not remove the cap from the connection pipe before connecting the pipe.
7. ELECTRICAL WIRING
9.1
13.2
16.6
• Before connecting the wires, make sure the power supply is OFF.
19.7
• Every wire must be connected fi rmly.
24.0
• No wire should be allowed to touch refrigerant tubing, the compressor, or any mov-
ing part.
• Loose wiring may cause the terminal to overheat or result in unit malfunction. A fi re
hazard may also exist. Therefore, be sure all wiring is tightly connected.
• Connect wires to the matching numbers of terminals.
17
22
Be careful not to generate a spark as follows for using a fl ammable refrigerant.
• Do not remove the fuse while the power is on.
26
• Do not disconnect the wiring while the power is on.
29
• It is recommended to position the outlet connection in a high position. Place the
36
cords so that they do not get tangled.
7.1. Wiring system diagram
INDOOR UNIT
TERMINAL
WARNING
CAUTION
Tighten with 2 wrenches.
Torque wrench
Connection pipe
Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia.
16 to 18 (160 to 180)
9.52 (3/8) dia.
32 to 42 (320 to 420)
12.70 (1/2) dia.
49 to 61 (490 to 610)
15.88 (5/8) dia.
63 to 75 (630 to 750)
19.05 (3/4) dia.
90 to 110 (900 to 1,100)
WARNING
CAUTION
Type 60245 IEC57
Cable size 1.5 mm
2
(Inter-unit)
Power line
Control line
Earth (Ground) line
Holding wrench
Flare nut
OUTDOOR UNIT
Please connect to the
specifi ed terminal.
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