Step 5 Purging Inert Gas From The Indoor Unit; Step 6 Cutting And Flaring The Pipes - Samsung AM RN4 CH Series Installation Manual

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
Indoor unit
0.67 inch (17 mm) 17 mm
Gauge of dimensions
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
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:
2 If you wish to shorten the pipes, cut them with a pipe
20 mm
0.79 inch (20 mm)
Ceiling Ceiling
3 To prevent any gas from leaking out, remove all burrs
4 Slide a flare nut on to the pipe and modify the flare.
Liquid side Liquid side
Gas side
Gas side
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 Pipe cutter
90° 9 90°
Pipe
Pipe
Oblique
Oblique
at the cut edge of the pipe, using a reamer.
D
A
Flare
Pipe
Pipe Flare
Outer Diameter (D) Depth (A)
Ø1/4 (6.35) 0.051 (1.3)
Ø3/8 (9.52) 0.071 (1.8)
Ø1/2 (12.70) 0.079 (2.0)
Ø5/8 (15.88) 0.087 (2.2)
Ø3/4 (19.05) 0.087 (2.2)
Burr
Rough
Rough
Burr
R 0.016 to 0.031 inch
(R 0.4 to 0.8 mm)
R 0.4 to 0.8 mm
D
L
Flare
Flare
Unit: inch (mm)
Flare dimension (L)
0.34 to 0.36
(8.7 to 9.1)
0.50 to 0.52
(12.8 to 13.2)
0.64 to 0.65
(16.2 to 16.6)
0.76 to 0.78
(19.3 to 19.7)
0.93 to 0.94
(23.6 to 24.0)
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