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Purging the unit
On delivery, the indoor unit is loaded with inert gas.
All this gas must 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.
• To prevent dirt or foreign objects from getting into the pipes during
installation, do NOT remove the pinch pipe completely until you are
NOTE
ready to connect the piping.
Connecting the refrigerant pipe
There are two refrigerant pipes of differing diameters :
f A smaller one for the liquid refrigerant
X
f A larger one for the gas refrigerant
X
f The inside of copper pipe must be clean & has no dust.
X
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.
f Liquid refrigerant port
X
f Gas refrigerant port
X
f Drain hose port
X
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
1/4inch(6.35 mm)
3/8inch(9.52 mm)
1/2inch(12.70 mm)
5/8inch(15.88 mm)
• 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.
20
Big Duct_IBIM_E_33766-3.indd 20
Torque
10.46~12.63 ft•lb(145~175 kgf•cm)
24.02~29.36 ft•lb(333~407 kgf•cm)
36.43~44.37 ft•lb(505~615 kgf•cm)
45.45~55.48 ft•lb(630~769 kgf•cm)
Wet cloth
Liquid
refrigerant port
Gas refrigerant port
Welding flame
Refrigerant oil
Torque wrench
Flare nut
Union
A
❋ ❋ The designs and shape are subject to
change according to the model.
2012-01-13 오후 9:40:28
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