Gree GMV-24WL/C-T, Service Manual

Page: 82 / 150

GREE DC Inverter Side Discharge VRF
Ⅱ
for North America
79
Fig. 19
(2) Y-type branch has several pipe sections with different dimension, which facilitates to match with
various copper pipes. Use pipe cutter to cut in the middle of the pipe section that is of proper
dimension and remove burrs as well. See Fig. 20.
(3) Y-type branch must be installed vertically or horizontally.
Fig. 20
Branch shall be isolated by insulating material that can bear 120
℃
(248
℉)
or even higher temperature. The attached
foam of branch cannot be taken as insulating material.
6.1.5 Thermal Insulation for Pipeline
(1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
(2) At the branch inlet, leave at least 500mm(19-3/4inch) straight pipe section.
(3) Thermal insulation for pipeline
1) To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid pipe
must be wrapped with thermal insulating material and adhesive tape for insulation from the
air.
2) Joints of indoor and outdoor unit should be wrapped with insulating material and leave no
gap between pipe and wall. See Fig. 21.
Fig. 21
3) When wrapping the tape, the later circle should cover half of the former one. Don
’t wrap the
rape too tight, otherwise the insulation effect will be weakened.
4) After wrapping the pipe, apply sealing material to completely seal the hole on the wall.