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Purging the connected pipes
Outdoor unit
Indoor unit
Gas pipe side
Liquid pipe side
Manifold gauge
Valve
Gas service port
<Low pressure>
Vacuum
Pump
Liquid service port
<High pressure>
Model
A
10
09
12
20
18
20
20
24
• 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.
The outdoor unit is loade
You should purge the air in the indoor unit and in the pipe.
If air remains in the refrigerant pipes, it
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
ø6.35 mm
ø9.52 mm
ø12.70 mm
ø15.88 mm
• Excessive torque can be cause of gas leakage.
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.
-
M
a
e k
u s
e r
h t
t a
r p
s e
u s
e r
g
u a
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.
Adding Refrigerant
You must add refrigerant if the pipe is longer than 5 meters.
If you use a pipe...
longer than 5 meters,
shorter than 5 meters,
erant for a 5-meter pipe
R22
ects the compressor. It may cause
Torque (kgf•cm)
N•m
(kgf•cm)
14 ~ 18
140 ~ 180
34 ~ 42
350 ~ 430
49 ~ 61
500 ~ 620
68 ~ 82
690 ~ 830
e g
h s
o
w
s
0 -
1 .
M
P
- ( a
6 7
c
m
H
g
a )
t f
r e
Then...
'A'g of refrigerant R22
must be added for each extra meter.
The purge time is normal.
b a
o
t u
35
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