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Evacuating the connected pipes
1. Connect each assembly pipe to correct 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.
"stand by mode". Do not turn on the system!
This is necessary for better vacuum (full OPEN position of
Electronic Expansion Valve - EEV -).
3. Connect the 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
about15 minutes.
Make sure that pressure gauge shows 400 microns after about
10 minutes.
This procedure is very important to avoid a 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.
Adding Refrigerant
Add refrigerant charge according to table below:
If you use a pipe longer than 24.6ft(7.5m),
'A' g of refrigerant R-410A must be added for each extra meter.
If you use a pipe shorter than 24.6ft(7.5m),
The evacuate time is normal.
Refer to the Service Manual for further details.
English-50
Outdoor unit
Gas pipe side
Liquid pipe side
Torque
Outer
Diameter
ø1/4 inch
14~18
(ø6.35mm)
ø3/8 inch
34~42
(ø9.52mm)
ø1/2 inch
49~61
(ø12.70 mm)
ø5/8 inch
68~82
(ø15.88mm)
Manifold gauge
Valve
Gas service port
<Low pressure>
Liquid service port
<High pressure>
Model
09/12/18
24
Indoor unit
f
10.1~13.0
(140~180)
25.3~31.1
(350~430)
36.2~44.8
(500~620)
49.9~60.0
(690~830)
Vacuum
Pump
(Backward flowing
prevention)
A
15
40
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