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Installation Procedure
7 Adjust the unit to the appropriate position, taking into
account the installation area for the front panel.
• Place the pattern sheet on the indoor unit.
• Adjust the space between the ceiling and the
indoor unit by using a dimension gauge.
• Fix the indoor unit securely after adjusting the
level of the unit by using a leveller.
• Remove the pattern sheet and install the front
panel.
Indoor unit
Gauge of
dimensions
Step 5 Purging inert gas from the
indoor unit
The indoor unit comes with nitrogen gas (inert gas)
charged at the factory. Therefore, all inert gas must be
purged before connecting the assembly piping.
Unscrew the pinch pipe at the end of each refrigerant
pipe.
Insulator
NOTE
• To prevent dirt or foreign objects from getting into
the pipes during installation, do not remove the pinch
pipe completely until you are ready to connect the
piping.
10
English
Step 6 Cutting and flaring the pipes
1 Make sure that you have the required tools available:
2 If you wish to shorten the pipes, cut them with a pipe
Ceiling
For the recessed installation
of the square panel:
11.5 mm (0.45 in.)
For the recessed installation
of the circular panel:
41.5 mm (1.63 in.)
3 To prevent any gas from leaking out, remove all burrs
4 Slide a flare nut on to the pipe and modify the flare.
Outer Diameter (D)
Gas side
Liquid side
15.88
19.05
pipe cutter, reamer, flaring tool, and pipe holder.
cutter, ensuring that the cut edge remains at a 90°
angle to the side of the pipe. Refer to the illustrations
below for examples of edges cut correctly and
incorrectly.
Pipe cutter
Oblique
Pipe
at the cut edge of the pipe, using a reamer.
D
A
Flare
Pipe
Depth (A)
mm
inch
mm
inch
6.34
1/4
1.3
0.051
9.52
3/8
1.8
0.071
12.7
1/2
2.0
0.079
5/8
2.2
0.087
3/4
2.2
0.087
Rough
Burr
R 0.4 to 0.8 mm
(0.016 to 0.032 in.)
D
L
Flare
Flare dimension (L)
mm
inch
8.7 to 9.1
0.34 to 0.36
12.8 to 13.2
0.5 to 0.52
16.2 to 16.6 0.64 to 0.65
19.3 to 19.7 0.76 to 0.78
23.6 to 24.0 0.93 to 0.95
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