maintenance of motor
˖
Check all the joints with the leak detector or soap water. (See
Fig.9-6
as a reference illustration)
Be sure to with insulating materials cover all the exposed parts
of the flare pipe joints and refrigerant pipe on the liquid-side and
the gas-side. Ensure that there is no gap between them.
Incomplete insulation may cause water condensation.
9.2 Check The Leakage
9.3 Insulation
B
A
D
C
Check-point of indoor unit
Check-point of outdoor unit
A. Lo-stop valve B. Hi-stop valve
C,D. Joints of the connecting pipe to the indoor unit.
Fig.9-2
9. REFRIGERANT PIPE CONNECTION
9.1 Expel The Air
Fig.9-1
●
●
Flaring
Cut a pipe with a pipe cutter.
Insert a flare nut into a pipe and flare the pipe.
90
lean
crude burr
A
90
+4_
45+2
_
Outside diameter
A(mm)
Max
8.7
Φ6.4mm
Φ9.5mm
Φ12.7mm
Φ15.9mm
Φ19.1mm
12.4
15.8
19.0
23.3
8.3
12.0
15.4
18.6
22.9
Min
Table.9-1
Fig.9-3
Fig.9-4
0 1 2
F
3
E
4
D
5
C
6
B
7
A
89
Installation manual
14
Torque
Tubing size
14.4~17.2N.m
32.7~39.9N.m
49.5~60.3N.m
61.8~75.4N.m
92.7~118.6N.m
Φ6.4mm
Φ9.5mm
Φ12.7mm
Φ15.9mm
Φ19.1mm
Table.9-2
●
●
Fasten the nut
Put the connecting tubing at the proper position, wrench the
nuts with hands then fasten it with a wrench. (Refer to
Fig.9-4
Too large torque will harm the bellmouthing and too small will
cause leakage. Please determine the torque according to
Table.9-2.
High pressure duct
