GMV DC Air Handler
9
4.3 Piping Work
4.3.1 Specification of Connection Pipe
Model
External Diameter (inch)
Gas Pipe
Liquid Pipe
GMV-ND09A/B-T(U)
3/8
1/4
GMV-ND12A/B-T(U)
1/2
1/4
GMV-ND18A/B-T(U)
5/8
3/8
GMV-ND24A/B-T(U)
5/8
3/8
GMV-ND30A/B-T(U)
5/8
3/8
GMV-ND36A/B-T(U)
5/8
3/8
GMV-ND42A/B-T(U)
5/8
3/8
GMV-ND48A/B-T(U)
5/8
3/8
GMV-ND54A/B-T(U)
3/4
3/8
GMV-ND60A/B-T(U)
3/4
3/8
4.3.2 Piping Preparation
4.3.2.1 Solder Connection
All cut ends are to be round, burr free, and cleaned. Failure to follow this practice increases the
chances for refrigerant leakage.
Fig.4.3.1
4.3.2.2 Screw Connection
(1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the flaring
nut with hand as shown in Fig.4.3.2
(2) Tighten the flaring nut with torque wrench.
Fig.4.3.2
Pipe diameter mm(inch)
Torque(N•m)
Φ6.35(1/4)
15~30
Φ9.52(3/8)
35~40
Φ12.7(1/2)
45~50
Φ15.9(5/8)
60~65
Φ19.05(3/4)
70~75
Summary of Contents for GMV-ND09A/B-T
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