DC Inverter Multi VRF System
17
4.3.5 Installation of Y-type Branch
(1) Y-type Branch
Fig. 18
(2) Y-type branch has several pipe sections with different dimensions, which facilitates
matching to various copper pipes. Use pipe cutter to cut in the middle of the pipe section and
remove burrs. See Fig. 17.
(3) Y-type branch must be installed vertically or horizontally.
Fig. 19
Branch shall be isolated by insulating material that can bear 120
ć
(248
̧
)or even higher temperature. The foam
attached to the branch is not considered as insulating material.
4.3.6 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.
2) Joints of indoor and outdoor unit should be wrapped with insulating material leaving no
gap between pipe and wall. See Fig. 20.
