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.
3.Connect the charging hose of the
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.
Outdoor unit | Indoor unit |
| Gas pipe side |
| Liquid pipe side |
Outer | Torque | |
Diameter | N•m | kgf•cm |
ø6.35 mm | 14~18 | 140~180 |
ø9.52 mm | 34~42 | 350~430 |
ø12.70 mm | 49~61 | 500~620 |
ø15.88 mm | 68~82 | 690~830 |
Make sure that pressure gauge shows
This procedure is very important to avoid a gas leak.
Close the valve of the low pressure side of manifold gauge clockwise.
Turn off the vacuum pump.
Check for 2 minutes if there is any pressure change.
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.
Manifold gauge
Valve 
Gas service port <Low pressure>
| Vacuum |
Liquid service port | Pump |
<High pressure> | (Backward flowing |
| prevention) |
Adding Refrigerant
Add refrigerant charge according to table below:
If you use a pipe longer than 4 m(24) or 5 m(18),
‘A’g of refrigerant
If you use a pipe shorter than 4 m(24) or 5 m(18),
The evacuating time is normal.
Refer to the Service Manual for further details.
Model | A |
|
|
18/24 | 20 |
|
|
• 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.
English-50
2/17/2015 2:57:05 PM 
