Vivax ACP-48COFM140GEEI, User Manual

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15
6.5
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.
Table 5
Pipe diameter (mm) Wall thickness (mm) Tightening torque (N-m)
Φ6.35 ≥0.5
15
～
30
Φ9.52 ≥0.71
30
～
40
Φ12.7 ≥1
45
～
50
Φ15.9 ≥1
60
～
65
Φ19.05 ≥1
70
～
75
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".
Fig. 14
Fig. 15