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Evacuating the connected pipes
1. Connect each assembly pipe to the appropriate valve on the outdoor unit and
tighten the flare nut.
2. Tighten the flare nut first with your hands, and then with a torque wrench,
applying the following torque.
• Excessive torque can be cause of gas leakage.
• M ake the electrical connection and leave the system into " stand by
mode". Do not turn on the system!
This is necessary for better vacuum operation (full OPEN position of
Electronic Expansion Valve - EEV -).
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. Evacuate the air in the connected pipes using the vacuum pump for about
15 minutes.
Make sure that pressure gauge shows -0.1 MPa(-76 cmHg) after about
f
10 minutes.
This procedure is very important to avoid a gas leak.
Close the valve of the low pressure side of manifold gauge clockwise.
f
Turn off the vacuum pump.
f
Check for 2 minutes if there is any pressure change.
f
Remove the hose of the low pressure side of manifold gauge.
f
6. Set a valve cork of liquid and gas service port to the open position.
Adding Refrigerant
Add refrigerant charge according to table below:
If you use a pipe longer than 4 or 5 m,
'30' g of refrigerant R22 must be added for each extra meter.
If you use a pipe shorter than 4 or 5 m,
The evacuate time is normal.
Refer to the Service Manual for further details.
• T he remaining air in the Refrigeration cycle, which contains moisture, may cause malfunction on the compressor.
• A lways contact the service center or a professional installation agency for product installation.
English-45
Outdoor unit
Gas pipe side
Liquid pipe side
Torque
Outer
Diameter
N•m
ø6.35 mm
14~18
34~42
ø9.52 mm
ø12.70 mm
49~61
68~82
ø15.88 mm
Manifold gauge
Valve
Gas service port
<Low pressure>
Vacuum
Liquid service port
(Backward flowing
<High pressure>
prevention)
Indoor unit
kgf•cm
140~180
350~430
500~620
690~830
Pump
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