X3 Multisplit Cassette
,8
6
Note! Please do tighten the nuts and bolts to prevent air conditioner break off.
2.6 Connection of the refrigerant pipe
When connect the pipe to the unit or backout it from the unit, please do use
both spanner and torque wrench. as shown in Fig. 2.5.
When connect, smear both inside and outside of the flare nut with freeze motor
oil, screw it by hand and then tighten it with spanner.
Refer to Table 2.1 to check if the wrench had been tightened (too tight would
mangle the nut and lead leakage).
Examine the connection pipe to see if it had gas leakage, then take the
treatment of heat insulation, as shown in the Fig. 2.5.
Only use median sponge to entwine the wiring interface of the gas pipe and
heat preservation sheath of the gas collection tube.
Fig. 2.5
Table 2.1: The tightening torque needed for tightening nut
Diameter
（
Inch
）
Surface thickness
（
mm
）
Tightening torque (N·m)
Φ
1/4’’
≥
0.5
15-30 (N·m)
Φ
3/8’’
≥
0.71
30-40 (N·m)
Φ
1/2’’
≥
1
45-50 (N··m)
Φ
5/8’’
≥
1
60-65 (N·m)
Φ
3/4’’
≥
1
70-75 (N··m)
