Gree NCHS1B(U) - Size Requirement for Branch Pipe and Piping

GMV5 HR Heat Recovery Cooling and Heating Mode Exchanger
21
4.2.7 Size requirement for branch pipe and piping
Take the connection sketch map of single-module system for example.
Fig. 4.30
4.2.7.1 Branch selection of mode exchanger (“A1, A2”)
Select branch of mode exchanger as per total capacity of downstream indoor unit(s). Please
refer to the following table.
Model selection for branch
“
A1
、
A2” of mode exchanger
；
R410A refrigerant system
Total capacity of the downstream indoor unit X (Btu/h)
Model
Y-Type Branch Pipe
X≤17100
FQ01Na/A
17100＜X≤72000
FQ02Na/A
72000＜X≤96000
FQ03Na/A
96000＜X≤232000
FQ04Na/A
232000＜X≤327500
FQ05Na/A
327500＜X
FQ06Na/A
4.2.7.2 Connection for single indoor unit with capacity of less than 48500Btu/h
Piping size among downstream branches of mode exchanger “a
、
h
、
l”
Total rated capacity of downsteam
indoor units: X (Btu/h)
Piping size among downstream branches of mode exchanger
Gas pipe (mm)
Liquid pipe (mm)
X
≤
9500
Φ9.52(3/8)
Φ6.35(1/4)
9500
＜
X
≤
17100
Φ12.7(1/2)
Φ6.35(1/4)
17100
＜
X
≤
48500
Φ15.9(5/8)
Φ9.52(3/8)
Each branch is to connect to a set of indoor units with the same mode. For the branch does not
connect to indoor unit, make sure that the welding is reliable without leaking of refrigerant.
Branch selection of downstream indoor unit of mode exchanger (“B1
、
B2
、
B3”)
R410A refrigerant system
Total rated capacity of downsteam
indoor units: X (Btu/h)
Model
Y-type branch
X
≤
48500
FQ01A/A