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C
I
OMPLETING THE
NSTALLATION
Purging the Connected Pipes
Outdoor unit
Gas pipe side
A
Liquid pipe side
B
❊ The designs and shape are subject to change
according to the model.
Valve stem
Stem cap
Model
✴✴18✴✴
✴✴24✴✴
12
E-
The outdoor unit is loaded with sufficient R22 refrigerant 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 affects the compressor. It may cause
reduction of cooling and heating capacity and malfunction. Refrigerant for air
purging is not charged in the outdoor unit.
Use Vacuum Pump as seen in the picture.
1
Connect each assembly pipe to the appropriate valve on the outdoor
Indoor unit
unit and tighten the flare nut.
C
2
Tighten the flare nut first with your hands, and then with a torque
wrench applying the following torque.
D
3
Connect the charging hose of 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 vacuum pump for about 10 minutes.
- Close the valve of the low pressure side of manifold gauge clockwise.
- Make sure that pressure gauge show -0.1MPa(-76cmHg) after about
- Turn off 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.
Vacuum Pump
7
Mount the valve stem nuts and the service port cap to the valve, and
tighten them at the torque of 183 kgf•cm with a torque wrench.
8
Check for a gas leak.
- At this time, especially check for a gas leak from the 3-way valve's
A
Adding Refrigerant
(gas)
You must add refrigerant if the pipe is longer than 5 meters.
B
(liquid)
☛
A
30
40
Refer to the Service Manual for further details.
Outer Diameter
6.35 mm
12.70 mm
15.88 mm
10 minutes.
This procedure is very important to avoid a gas leak.
stem nuts and from the service port cap.
If you use a pipe...
longer than 5 meters,
shorter than 5 meters,
Torque (kgf•cm)
140~170
380~420
440~480
Then...
'A'g of refrigerant R22 must
be added for each extra metre.
The purge time is normal.
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