4. Installing the refrigerant piping
Fig. 4-3
D
65
77
7.8
67
365
1170
444 (
A
)*
123
482 (
B
)
154
585 (
C
)
1155
65
65
77
87
F
F
77
87
71.2
18.2
134
295
5
65
67 77
7.8
G
E
3.$0.$/
Fig. 4-4
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3.$0.$/
B
A
D
C
B
A
4.3. Indoor unit
Refrigerant and Drainage Piping Sizes
Item
Model
3.$0.$/
Refrigerant
piping
Liquid
2'¡
Gas
2'¡
Drainage piping
ODø16
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3.$0.$/
A
Gas pipe
* Indicates the condition with accessories mounted.
B
Liquid pipe
C
Drain hose
D
Left-side piping knockout hole
E
Right-side piping knockout hole
F
Lower piping knockout hole
G
Mount board
1
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Indoor unit
1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
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3. Quickly connect the on site cooling pipes to the unit.
4. Wrap the pipe cover that is attached to the gas pipe and make sure that the
connection join is not visible.
5. Wrap the pipe cover of the unit’s liquid pipe and make sure that it covers the
insulation material of the on site liquid pipe.
6. The portion where the insulation material is joined is sealed by taping.
A
Site-side refrigerant piping
B
Unit side refrigerant piping
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1. Wrap the supplied felt tape in the range of the refrigerant piping which will be
housed within the piping space of the unit to prevent dripping.
2. Overlap the felt tape at one-half of the tape width.
3. Fasten the end portion of the wrapping with vinyl tape, etc.
A
Gas pipe
B
Liquid pipe
C
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D
Felt tape
3
Fig. 4-2
E
F
B
Copper pipe O.D.
PP
%PP
)ODUHWRROIRU55$
Clutch type
¡´
0 - 0.5
¡´
0 - 0.5
E
Die
F
Copper pipe
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connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
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8VHIODUHGQXWLQVWDOOHGWRWKLVLQGRRUXQLW
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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
1āP
ø9.52
22
34 - 42
ø15.88
29
68 - 82
C
Apply refrigerating machine oil over the entire flare seat surface.
Do not apply refrigerating machine oil to the screw portions.
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D
Be certain to use the flare nuts that are attached to the main unit.
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