ENGLISH
35
Purging the connected pipes
Outdoor unit
Indoor unit
Gas pipe side
Liquid pipe side
B
(liquid)
Stem cap
Valve stem
A
(gas)
Model
A
09
10
12
20
13
20
Vacuum
Pump
Manifold gauge
Valve
Gas service port
<Low pressure>
Liquid service port
<High pressure>
The outdoor unit is loade
erant for a 5-meter pipe
You should purge the air in the indoor unit and in the pipe.
If air remains in the refrigerant pipes, it ects the compressor. It may cause
reduction of cooling capacity and malfunction.
1
Connect each assembly pipe to the appropriate valve on the outdoor unit and
tighten the are nut.
2
Tighten the are nut rst with your hands, and then with a torque wrench,
applying the following torque:
Outer Diameter
Torque (kgf
•
cm)
ø6.35 mm
140~170
ø9.52 mm
250~280
ø12.70 mm
380~420
ø15.88 mm
440~480
3
Connect the charging hose of the low-pressure side of manifold gauge to a
gas service port as seen in the picture.
4
Open the valve of the low pressure side of manifold gauge counterclockwise.
5
Purge the air in the connected pipes using the vacuum pump for about
15 minutes.
- Close the valve of the low pressure side of manifold gauge clockwise.
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6
7
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.
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o
h
s
e
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a
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s
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k
a
M
-
10 minutes.
This procedure is very important to avoid a gas leak.
- Turn o the vacuum pump.
- Remove the hose of the low pressure side of manifold gauge.
6
Set a valve cork of liquid and gas service port to the open position.
7
Mount the valve stem nuts and the service port cap to the valve, and tighten
them at the torque of 183kgf
•
cm with a torque wrench.
8
Check for a gas leak paying particular attention to the 3-way valve’s stem nuts
and to the service port cap (Refer to page 36).
Adding Refrigerant
You must add refrigerant if the pipe is longer than 5 meters.
If you use a pipe...
Then...
longer than 5 meters,
'A'g of refrigerant R22 must be added
for each extra meter.
shorter than 5 meters,
The purge time is normal.
18
20
20
20
20
24
25
19
•
Excessive torque can be cause of gas leakage.
•
The remaining air in the Refrigeration cycle, which contains moisture, may cause malfunction on the compressor.
•
Always contact the service center or a professional installation agency for product installation.