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.
Outdoor unit
Indoor unit
Gas pipe side
Liquid pipe side
• Excessive torque can be cause of gas leakage.
• Make 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
10 minutes.
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.
Vacuum
Pump
Manifold gauge
Valve
Gas service port
<Low pressure>
Liquid service port
<High pressure>
(Backward flowing
prevention)
• 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.
Add refrigerant charge according to table below:
If you use a pipe longer than
4 or 5
m,
‘A’ g of refrigerant R-410A&R22 must be added for each extra meter.
(R-410A : AR
FQSS
, R22 : AR
FPSS
)
If you use a pipe shorter than
4 or 5
m,
The evacuate time is normal.
Refer to the Service Manual for further details.
Adding Refrigerant
Outer
Diameter
Torque
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
Model
A
09/12
10
18
20
24
30
English-45
INST
ALL
ATION
05
A3050 FA_IB&IM_DB68-04003A_HP_EN.indd 45
2013-12-25 15:27:57
