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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
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
(Unit: mm)
20
Ceiling
Liquid side
Gas side
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.
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.
Damaged
Correct
Inclined
Surface
Oblique
Rough
Burr
R 0.4 to 0.8 mm
D
L
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
Uneven
Cracked
Thickness
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