Gree CN851W1000, Service Manual

Page: 113 / 233

108
DC Inverter Multi
VRF Service Manual
Too much eliminated
The contact face
becomes small
Flared nut
5.5.5 Pipe bending
Work Methods
a.
Bend by hand ………………………..Suitable to fine copper pipe (φ6.35mm-φ12.7mm).
b. Machining with spring pipe bender …….. Bend by inserting the spring into copper pipe or sheathing onto the
copper pipe (φ6.35mm-φ22.2mm).
c.
Machining with hand-operated pipe bender……Use the pipe bender of suitable dimension (φ6.35mm-φ22.2mm).
d.
Machining with electric pipe bender (hydraulic)……Suitable for mass machining of fine and coarse fitting pipes
(φ6.35mm-φ69.9mm).
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.
No joint is required, which will save the material costs. Reduced waste of fitting pipe materials.
Reduced resistance in the fitting pipe. The bending radius higher than the pipe joint.
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.)