Sinclair MS-E48AIN, Service Manual

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②
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.
③
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.
5.7.4 The process of install refrigerant pipes
①
Remove the screw caps from the pipes.
②
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).
③
Tighten the flaring nuts with torque wrench until you hear a “click”. (The spanner and torque wrench
should be perpendicular to the refrigerant pipeline).
④
The following table for the torque required to tighten the nuts.
Pipe diameter Thickness of copper tube Tightening torque
Φ
6.35 mm
≥
0.8 mm 15
～
30 N·m
Φ
9.52 mm
≥
0.8 mm 35
～
40 N·m
Φ
12.7 mm
≥
0.8 mm 45
～
50 N·m
Φ
15.9 mm
≥
1.0 mm 60
～
65 N·m
Φ
19.05 mm
≥
1.0 mm 70
～
75 N·m
Caution!
‹
During the connection of the indoor unit and DB module to the refrigerant pipe, never pull any joints of the
indoor unit and the DB 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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