Service manual

53
Pipe
Flare Nut
Pipe
Torque Wrench
Ordinary
4) The bending degree of the pipe can not be too small; otherwise it will crack. And please use a pipe bender to bend
the pipe.
5) Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.
Moments of Torque for Tightening Screws
Diameter Wall Thickness
（
mm
）
Moment of Torque
φ6.35mm
≥
0.5 15-30
(
N·m)
φ9.52mm
≥
0.71 30-40(N·m)
φ12.7mm
≥
1 45-50(N·m)
φ15.9mm
≥
1 60-65(N·m)
CAUTION
！
a. During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor unit by force;
otherwise the capillary pipe or other pipe may crack, which then would result in leakage.
b. The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of it.
CAUTION
！
For the GMV multi VRF system, each pipe should be labeled to tell which system it belongs to avoid mistaken
inaccurate piping.
e. Installation of the Protection Layer of the Refrigerant Pipe
1) The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent condensing
and leaking.
2) The joints of the indoor unit should be wrapped with the insulating material and no gas is allowed on the joint of
the indoor unit.
No gap
CAUTION
！
After the pipe is protected well enough, never bend it to form a small angle; otherwise it would crack or break
f. Wrapping the pipe with tape:
1) Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe to prevent
the condensate water overowing.
2) Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall. During the
wrapping, the later circle should cover half of the former one.
3) Fix the wrapped pipe on the wall with clamps.
CAUTION
！
a. Do not wrap the pipe too tightly; otherwise the insulation effect would be weakened. Additionally, make sure the
drain hose is separated from the pipe
b. After that, ll the hole on the wall with sealing material to prevent wind and rain coming into the room.
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