E-7
Purging the Unit
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.
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.
Note
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result: All inert gas escapes from the indoor unit.
Connecting the Refrigerant Pipe
There are two refrigerant pipes of differing diameters:
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.
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.
Liquid refrigerant port
Gas refrigerant port
Drain hose port
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
(mm)
Torque
kgf•cm N•m
6.35
140~180
14~18
9.52
350~430
34~42
12.7
500~620
49~61
15.88
690~830
68~82
Must apply refrigerant oil on the flaring area to prevent a leak.Note
2 Be sure that there must be no crack or kink on the bended area.
Refrigerant oil
Torque wrench
Flare nut
Union
Spanner
The designs and shape are subject to change
according to the model.
Liquid
refrigerant
port
Gas
refrigerant
port
The designs and shape are subject to change
according to the model.
A
NASA_Floor Stand_AM@@@FNFDEH@_IM_EN_03678A-05.indd 7 2016-05-09 오후 5:32:30
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