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Heat insulation for refrigerant pipes:
1 Wrap the enclosed large-sized pipe cover around the gas pipe, making sure that
the end of the pipe cover touches the side of the unit.
2 Wrap the enclosed small-sized pipe cover around the liquid pipe, making sure that
the end of the pipe cover touches the side of the unit.
3 Secure both ends of each pipe cover with the enclosed bands. (Attach the bands
20 mm from the ends of the pipe cover.)
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connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
leakage from the refrigerant piping to the indoor unit.)
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more downward slope.
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1
Correct piping
2
Wrong piping
A
Insulation (9 mm or more)
B
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C
Support metal
K
Air bleeder
L
Raised
M
Odor trap
Grouped piping
D
2'¡39&78%(
E
Make it as large as possible
F
Indoor unit
G
Make the piping size large for grouped piping.
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(9 mm or more insulation)
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1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 3-5)
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5. Insulate the drain port with insulating material, then secure the material with a
band. (Both insulating material and band are supplied with the unit.)
A
Unit
B
Insulating material
C
Band (large)
D
Drain port (transparent)
E
Insertion margin
F
Matching
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Insulating material (purchased locally)
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Band (small)
L
Drain socket
11
25
25
25
,
Max. 20m
1.5–2m
Max. 15cm
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(mm)
C
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* Do not apply refrigerating machine oil to the screw portions.
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(Use of commercially-available products may result in cracking.)
Refrigerant pipe and
insulating
material
Pipe cover (large)
Pipe cover (small)
Refrigerant pipe (gas)
Refrigerant pipe (liquid)
Band
Cross-sectional view of
connection
Pipe
Insulating material
Squeeze
B
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R410A
Flare nut O.D.
Liquid pipe
Gas pipe
Pipe size
(mm)
Tightening
torque
(N.m)
Pipe size
(mm)
Tightening
torque
(N.m)
Liquid pipe
(mm)
Gas pipe
(mm)
3
2'¡´
2'¡´
49 - 61
17
26
P50
2'¡´
2'¡´
49 - 61
17
26
3
2'¡´
34 - 42
2'¡´
22
29
3
2'¡´
34 - 42
2'¡´
22
29
