Gree FXA2A-D Owner's Manual page 20

BU Module
The bending diameter of the pipeline must be greater than 200mm. The connection pipe cannot
often be bent or straightened. Otherwise it will harden and crack.
If the thermal insulation of the refrigerant pipe is not removed, please do not bend the pipe.
Otherwise, it maybe leads the pipe to crack. It is better to make an incision with a knife in the
thermal insulation and removes it. After elbow operation is finished, recover the thermal
insulation with binding band.
5.5.4 The process of install refrigerant pipes
Remove the screw caps from the pipes.
Align the flared end of copper tube with the center of pipe joint. Tighten the nuts by hands. (If
the flared end of copper tube and the center of pipe joint are not in coaxial, it is hard to tighten
the nuts by hands, please do not tighten it with spanners, because the screw thread may be
broken by force).
Tighten the flaring nuts with torque wrench until you hear a "click". (The spanner and torque
wrench should be perpendicular to the refrigerant pipeline).
The following table for the torque required to tighten the nuts.
Table 9
Pipe diameter Thickness of
copper tube
6.35 mm 0.8 mm
9.52 mm 0.8 mm
12.7 mm 0.8 mm
15.9 mm 1.0 mm
19.05 mm 1.0 mm
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Caution!
During the connection of the indoor unit and BU module to the refrigerant pipe, never pull any
joints of the indoor unit and the BU module by force; otherwise the capillary pipe or other pipe
may crack, which then would result in leakage.
The refrigerant pipe should be supported by brackets, that is, don't let the unit withstand the
weight of it.
For the Super Free Match system, each pipe should be labeled to tell which system it belongs to
avoid mistaken inaccurate piping.
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Tightening
torque
15 30 N·m
35 40 N·m
45 50 N·m
60 65 N·m
70 75 N·m
16
Fig. 24