Precaution For Connection - Gree GC201306 -1 Service Manual

6.8 Precaution for Connection

1) Pipe connections should be follow the following rules:
① Outdoor unit shall be installed close to the indoor unit, hence to minimize the length and bends of
connection pipes.
② The gap of outdoor unit and indoor units should be as small as possible
③ The bending diameter of the pipeline is better as large as possible.
2) The brazing operation must be strictly in accordance with the process requirements. During the
installation, do not damage the pipeline and the bending diameter must be greater than 200mm.
3) The connection pipe cannot often be bent or straightened. Otherwise it will harden.
4) The elbow operation must use the elbow. Otherwise, the pipe may be cracking.
5) The process of flaring
① Using the tube cutter cutting the connecting pipe in the middle and remove the burrs.
② Install the nut before the flaring operation.
③ Check the flared portion, whether there is fractured or not.
6) The following table for the torque required to tighten the nuts.
Pipe diameter（mm）
Φ6.35
Φ9.52
Φ12.7
Φ15.9
Φ19.05
7) Align the flared end of copper tube with the center of pipe joint. Tighten the nuts with hands.
8) Tighten the flaring nuts with torque wrench until you hear a "click".
9) After all the refrigerant installation has been done, use nitrogen to carry out gas leak check.
Caution!
During the connection of the indoor unit or BU module to the refrigerant pipe, never pull any joints of
the indoor unit or 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.
Wall thickness（mm）
≥0.5
≥0.71
≥1
≥1
≥1
Super Free Match
Service Manual
Tightening torque（N·m）
15～30
30～40
45～50
60～65
70～75
111 INSTALLATION