7
4. Installing the refrigerant piping
B
A
45
2
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Installing procedures
1. Slide the supplied pipe cover
2
over the gas tubing until it is pressed against the
sheet metal inside the unit.
2. Slide the provided pipe cover
3
over the liquid tubing until it is pressed against
the sheet metal inside the unit.
3. Tighten the pipe covers
2
and
3
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bands
4
.
A
Gas tubing
E
Pipe cover
3
B
Liquid tubing
F
Press the pipe cover against the sheet metal.
C
Band
4
G
Refrigerant tubing heat insulating material
D
Pipe cover
2
4.4. For twin/triple combination
Refer to the outdoor unit installation manual.
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to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses
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and do not contain any harmful contaminants such as sulfuric compounds,
oxidants, debris, or dust.
Warning:
When installing or relocating, or servicing the air conditioner, use only the
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not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high
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mechanical failure or system malfunction or unit breakdown. In the worst case,
this could lead to a serious impediment to securing product safety.
M35, 50
M60-140
Liquid pipe
ø6.35 thickness 0.8 mm
ø9.52 thickness 0.8 mm
Gas pipe
ø12.7 thickness 0.8 mm
ø15.88 thickness 1.0 mm
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with commercially available insulation materials (heat-resistant to 100 °C or more,
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carefully.
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connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
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of pipe re-fabricated.
B
Flare nut tightening torque
Copper pipe O.D.
PP
Flare nut O.D.
PP
Tightening torque
1ÂP
ø6.35
17
14-18
ø6.35
22
34-42
ø9.52
22
34-42
ø12.7
26
49-61
ø12.7
29
68-82
ø15.88
29
68-82
C
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Do not apply refrigerating machine oil to the screw portions.
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M50
M60
M71-140
Liquid side
¡ȅ
ø6.35
—
—
¡ȅ
¡ȅ
Gas side
¡ȅ
¡ȅ
¡ȅ
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A
Flare cutting dimensions
Copper pipe O.D.
PP
Flare dimensions
¡$GLPHQVLRQVPP
ø6.35
8.7 - 9.1
ø9.52
12.8 - 13.2
ø12.7
16.2 - 16.6
ø15.88
19.3 - 19.7
Copper pipe O.D.
PP
%PP
Flare tool for R32/R410A
Clutch type
¡Ǝ
0 - 0.5
¡Ǝ
0 - 0.5
¡Ǝ
0 - 0.5
¡Ǝ
0 - 0.5
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90° ± 0.5°
R0.4 - R0.8
E
Die
F
Copper pipe