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Purging the Unit
Wet cloth
Liquid
refrigerant port
Gas refrigerant port
Welding flame
Connecting the Refrigerant Pipe
Refrigerant oil
Torque wrench
Flare nut
Union
A
The designs and shape are subject to change
according to the model.
10
On delivery, the indoor unit is loaded with inert gas.
All this gas must therefore be purged before connecting the assembly piping.
To purge the inert gas, proceed as follows.
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result: All inert gas escapes from the indoor unit.
Note
To prevent dirt or foreign objects from getting into the pipes
during installation, do NOT remove the pinch pipe completely until
you are ready to connect the piping.
There are two refrigerant pipes of differing diameters:
The connection procedure for the refrigerant pipes varies according to the exit
position of the pipes from the indoor unit, as seen when facing the indoor in the "A"
side.
Spanner
1
Remove the pinch pipe on the pipes and connect the assembly pipes to each
pipe, tightening the nuts, first manually and then with a torque wrench, a
spanner applying the following torque.
Outer Diameter
Note
2
Be sure that there must be no crack or kink on the bended area.
A smaller one for the liquid refrigerant
A larger one for the gas refrigerant
The inside of copper pipe must be clean & has no dust.
Liquid refrigerant port
Gas refrigerant port
Drain hose port
kgf•cm
6.35 mm
140~180
9.52 mm
350~430
12.70 mm
500~620
15.88 mm
690~830
Must apply refrigerant oil on the flaring area to prevent a leak.
Torque
N•m
14~18
34~42
49~61
68~82
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