Gree NCHS1B(U) - Page 25

GMV5 HR Heat Recovery Cooling and Heating Mode Exchanger
22
Piping size between mode exchanger and downstream indoor unit (“ b
、
c
、
d
、
g”)
Total rated capacity of downsteam
indoor units: X (Btu/h)
Piping size between mode exchanger and downstream indoor unit
Gas pipe /mm(in.)
Liquid pipe/mm(in.)
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)
Size of connection pipe between indoor branch and indoor unit should be consistent with the
connection pipe of indoor unit.
Piping between indoor branch and indoor unit “e
、
f
、
i
、
j
、
k”
Rated capacity of indoor units
C(Btu/h)
Size of connection pipe between indoor branch and indoor unit
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)
4.2.7.3 Connecting method for indoor unit with capacity of over 48500kBtu/h
When connecting to the indoor unit with capacity of over 48500Btu/h, it is not allowed to connect
with only one branch; it must use two branches controlled by the same mainboard for parallel
connection.
Parallel connection
Indoor unit Communication
connection for mode exchanger
Remarks
Indoor unit No.1 and No.2
“1D1 1D2”
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.
Indoor unit No.3 and No.4
“3D1 3D2”
Indoor unit No.5 and No.6
“5D1 5D2”
Indoor unit No.7 and No.8
“7D1 7D2”
Fig. 4.31