Gree GMVVQ224WM/C-X Owner's Manual page 33

GMV Heat Recovery DC Inverter VRF
3.3.7 Branch selection of indoor unit of mode exchange box ("C1")
R410A refrigerant system
Y-type branch
3.3.8 Piping size between mode exchange box and downstream indoor unit ("m")
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 ("m")
Rated capacity of indoor units:
C(kW)
16<C≤22.4
22.4<C≤28
3.4 Pipeline Installation and Insulation
3.4.1 Pipeline Installation of Refrigeration System
(1) Before welding the pipeline sealing cap, please make sure there's no refrigerant in pipeline.
If welding it directly, it may cause unnecessary property damage or personal injury.
(2) Conform to the following principles during pipe connection: Connection pipeline should be as
short as possible. The height difference between indoor and outdoor units should be as short
as possible. Keep number of bends as little as possible. The radius of curvature should be
as large as possible.
(3) Weld the connection pipes between indoor and outdoor unit. Please strictly conform to the
requirements for welding process. Rosin joints and pin holes are not allowable.
Fig.3.3.10
Capacity of downstream indoor
units: X/kW
16<X≤28
Size of connection pipe between indoor branch and indoor unit
Gas pipe(mm)
Φ19.05
Φ22.2
29
Model
FQ01B/A
Liquid pipe(mm)
Φ9.52
Φ9.52