8
4. Installing the refrigerant piping
4.3. Connecting pipes (Fig. 4-2) (Fig. 4-3)
&RQGXFWVXI¿FLHQWDQWLFRQGHQVDWLRQDQGLQVXODWLRQZRUNWRSUHYHQWZDWHUGULS
-
ping from the refrigerant piping. (liquid pipe/gas pipe)
,QFUHDVHLQVXODWLRQGHSHQGLQJRQWKHHQYLURQPHQWZKHUHWKHUHIULJHUDQWSLSLQJLV
installed, or condensation may occur on the surface of the insulation material.
,QVXODWLRQPHDWUHVLVWDQWWHPSHUDWXUH&)7KLFNQHVV
15 mm, 5/8 inch or more)
* When the refrigerant piping is used in locations subject to high tempera-
ture and humidity such as in the attic, further addition of insulation may be
required.
7RLQVXODWHWKHUHIULJHUDQWSLSLQJDSSO\KHDWUHVLVWDQWSRO\HWK\OHQHIRDPEHWZHHQ
the indoor unit and insulation material as well as to the net between the insulation
PDWHULDO¿OOLQJDOOJDSV
(Condensation forming on the piping may result in condensation in the room or
burns when contacting the piping.)
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-
ODWLRQPDWHULDOVVSHFL¿FJUDYLW\RIWKLFNQHVVRIPPLQFKRUPRUH
[Fig. 4-3]
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A
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B
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completed.
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C
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D
:KHQEHQGLQJWKHSLSHVEHFDUHIXOQRWWREUHDNWKHP%HQGUDGLXVRIPP
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may result.
1
Pipes must be connected starting from the indoor unit.
Flare nuts must be tightened with a torque wrench.
2
Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil (Ap-
plied on site).
:KHQXVXDOSLSHVHDOLQJLVXVHGUHIHUWR7DEOHIRUÀDULQJRI5$UHIULJHUDQW
pipes.
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Warning:
When installing the unit, securely connect the refrigerant pipes before starting
the compressor.
Caution:
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piping may result in burns or frostbite.
Table 2 (Fig. 4-4
) mm
(inch)
Copper pipe O.D.
A
Flare tool for R410A
Flare tool for R22·R407C
Clutch type
¡
0 - 0.5 (0 - 1/64)
1.0 - 1.5 (3/64 - 1/16)
¡
0 - 0.5 (0 - 1/64)
1.0 - 1.5 (3/64 - 1/16)
¡
0 - 0.5 (0 - 1/64)
1.0 - 1.5 (3/64 - 1/16)
¡
0 - 0.5 (0 - 1/64)
1.0 - 1.5 (3/64 - 1/16)
¡
0 - 0.5 (0 - 1/64)
1.0 - 1.5 (3/64 - 1/16)
A
(Fig. 4-3)
Copper pipe O.D.
(mm) (inch)
Flare dimensions
¡$GLPHQVLRQVPPLQFK
¡
8.7 - 9.1 (5/16 - 3/8)
¡
12.8 - 13.2 (1/2 - 33/64)
¡
16.2 - 16.6 (41/64 - 21/32)
¡
19.3 - 19.7 (49/64 - 25/32)
¡
23.6 - 24.0 (15/16 - 61/64)
Copper pipe O.D.
(mm) (inch)
Flare nut O.D.
(mm) (inch)
Tightening torque
1āPIWāOEV
¡
17 (43/64)
14 - 18 (10 - 13)
¡
22 (7/8)
34 - 42 (25 - 30)
¡
22 (7/8)
34 - 42 (25 - 30)
¡
26 (1-3/64)
49 - 61 (35 - 44)
¡
26 (1-3/64)
49 - 61 (35 - 44)
¡
29 (1-9/64)
68 - 82 (49 - 59)
¡
29 (1-9/64)
68 - 82 (49 - 59)
¡
36 (1-27/64)
100 - 120 (71 - 87)
¡
36 (1-27/64)
100 - 120 (71 - 87)
1āP
10 kgf·cm
A
Liquid pipe
B
Gas pipe
C
Insulation
D
Taping
Fig. 4-2
Fig. 4-3
A
Flare cutting dimensions
B
Flare nut tightening torque
R1/64" to R1/32"
ø
A
45°± 2°
Fig. 4-4
A
Die
B
Copper pipe
A
