DC Inverter Multi VRF System User Manual
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4.2.3 Dimension of Pipe (Main Pipe) from ODU to the 1
st
Indoor Branch
Dimension of pipe from ODU to the 1
st
indoor branch will be determined by the dimension of
outdoor connection pipe.
Outdoor
Pipe between ODU and the 1 indoor branch
The 1 indoor branch
st
st
Fig.6
Dimension of outdoor connection pipe:
Basic module
Pipe dimension
Connection method
Gas pipe (mm)
Liquid pipe
(mm)
CHV-5S120NK
Φ15.9
Φ9.52
Flared joint
CHV-5S140NK
Φ15.9
Φ9.52
CHV-5S160NK
Φ19.05
Φ9.52
4.2.4 Selection of Indoor Branches
Select indoor branches according to the total capacity of downstream indoor units.
Outdoor
Indoor
Indoor branches
Fig.7
R410A
Refrigerant system
Total capacity of downstream indoor units C (kW)
Model
Y type branch
C 20.0
CH020N
4.2.5 Dimension of Pipe between Indoor Branches
Select pipe between indoor branches according to the capacity of downstream indoor units; if the
capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails.
