Photovoltaic Direct-driven Inverter VRF
24
4.2.5.7 Fitting pipe between indoor unit and manifold
Manifold should be matched with fitting pipe of indoor unit.
Fig.4.2.14
Rated capacity of indoor unit
C(Btu/h)
Pipe between indoor branch and IDU
Gas Pipe mm(in.)
Liquid Pipe mm(in.)
C
≤
9500
Φ9.52(3/8)
Φ6.35(1/4)
9500
＜
C
≤
17100
Φ12.7(1/2)
Φ6.35(1/4)
17100
＜
C
≤
48500
Φ15.9(5/8)
Φ9.52(3/8)
48500
＜
C
≤
72000
Φ19.05(3/4)
Φ9.52(3/8)
72000
＜
C
Φ22.2(7/8)
Φ9.52(3/8)
4.3 Installation of the Connection Pipe
4.3.1 Precautions when installing the connection pipe
NOTICE!
Before welding the pipeline
sealing cap, please make sure there’s no refrigerant in pipeline.
If welding it directly, it may cause unnecessary property damage or personal injury.
(1) Conform to the following principles during piping connection: Connection pipeline
should be as short as possible. The height difference between indoor and outdoor units
should be as short as possible. Keep number of bends as little as possible. The radius of
curvature should be as large as possible.
(2) Weld the connection pipes between indoor and outdoor unit. Please strictly conform to
the requirements for welding process. Rosin joints and pin holes are not allowable.
(3) When laying the pipes, be careful not to deform them. The radius of bending parts
should be more than 200mm(7-7/8in.). The pipes cannot be repeatedly bent or stretched,
otherwise the material will get harden. Do not bend or stretch the pipe over three times
at the same position.
(4) Please use a torque wrench to connect union nut on the indoor unit. See Fig. 4.3.1.
Summary of Contents for GMV-Y120WM/C-F
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