Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual page 51

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial
B2)
R410A refrigerant system
Y-type branch
5.7 Piping size between mode exchanger and downstream indoor unit (b,
c, d, g)
Rated capacity of indoor unit
C(Btu/h)
C≤9500
9500＜C≤17100
17100＜C≤48500
5.8 Piping between indoor branch and indoor unit (e, f, i, j, k)
Size of connection pipe between indoor branch and indoor unit should be consistent with the
connection pipe of indoor unit.
Rated capacity of indoor units:
X ((Btu/h)
C≤9500
9500＜C≤17100
17100＜C≤48500
5.9 Pipe size between indoor branches ("I")
Rated capacity of indoor units:
X ((Btu/h)
X≤9500
9500＜X≤17100
17100＜X≤48500
5.10 Connection method when capacity of indoor unit exceeds 48500
Btu/h
When connecting to the indoor unit with capacity of over 48500 Btu/h, it is not allowed to connect
with only one branch; it must use two branches controlled by the same main board for parallel
connection.
Parallel connection
Indoor unit No.1 and No.2
Indoor unit No.3 and No.4
Indoor unit No.5 and No.6
Indoor unit No.7 and No.8
Total rated capacity of downsteam indoor units: X(Btu/h)
Pipe between mode exchanger and IDU
Gas Pipe mm(inch)
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.9(5/8)
Size of connection pipe between indoor branch and indoor unit
Gas pip mm(inch)
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.9(5/8)
Size of connection pipe between indoor branch and indoor unit
Gas pipe mm(inch)
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.9(5/8)
Indoor unit communication
connection for mode exchanger
―1D1 1D2‖
―3D1 3D2‖
―5D1 5D2‖
―7D1 7D2‖
47
X≤48500
Liquid Pipe mm(inch)
Liquid pipe mm(inch)
Parallel connection can be conducted
only as the combination of this table, it
is not allowed to otherwise connect.
Note that after the connection,
manually set the SA2 dial code of
corresponding mainboard, and dial the
code in the first place to number end.
INSTALLATION
Model
FQ01A/A
Φ6.35(1/4)
Φ6.35(1/4)
Φ9.52(3/8)
Liquid pipe mm(inch)
Φ6.35(1/4)
Φ6.35(1/4)
Φ9.52(3/8)
Φ6.35(1/4)
Φ6.35(1/4)
Φ9.52(3/8)
Remarks