Gree GC201808-III, Service Manual

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GREE GMV5 HR HEAT RECOVERY UNITS
65
(11) 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.
Piping between indoor branch and indoor unit
“e/f/i/j/k”
Rated capacity of indoor units:
X ((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)
5.2 Connection method when capacity of indoor unit exceeds
48500Btu/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”
Connecting method is as shown in follown Fig.