Gree GMV-PD100W/NAB-K Service Manual page 74

DC Inverter Multi
VRF Service Manual
5.5.5 Pipe bending
Work Methods
2) Machining with spring pipe bender ........ Bend by inserting the spring into copper pipe or sheathing
4) Machining with electric pipe bender (hydraulic)......Suitable for mass machining of fine and coarse
Advantage
Decrease the weld joint, thus reduce the possibility of leakage and oxidization.
For example:
It can decrease the weld by 8 spots. Please act now to improve the quality.
Cautions:
During bending, there shall be no wrinkling or deformation on the inner side of the copper pipe.
Spring pipe bend
The bender inserted into the copper pipe must be cleaned.
Do not bend over 90º. (Otherwise, wrinkling may be formed on the inner side of copper pipe and in the
future, the copper pipe will be broken from this position.)
70
Too much eliminated
The contact face
becomes small
Flared nut