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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, connect the other cables
and install the front panel.
Indoor unit
17 mm
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.
Step 6 Cutting and flaring the pipes
1 Make sure that you have the required tools available:
pipe cutter, reamer, flaring tool, and pipe holder.
2 If you wish to shorten the pipes, cut them with a pipe
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.
10
English
20 mm
Ceiling
Gauge of dimensions
Liquid side
Gas side
Pipe cutter
90°
Pipe
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
D
A
Pipe
Flare
Outer Diameter (D)
Depth (A)
Ø6.35 mm
1.3 mm
Ø9.52 mm
1.8 mm
Ø12.70 mm
2.0 mm
Ø15.88 mm
2.2 mm
Ø19.05 mm
2.2 mm
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Correct
Inclined
Damaged
Surface
Oblique
Rough
Burr
R 0.4 to 0.8 mm
D
Flare
Flare dimension (L)
8.7 to 9.1 mm
12.8 to 13.2 mm
16.2 to 16.6 mm
19.3 to 19.7 mm
23.6 to 24.0 mm
Cracked
Uneven
Thickness
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