Samsung AS12SGGE Training Manual page 33

5
INSTALLATION
Installation Diagram of Indoor Unit and Outdoor Unit
5-2-7. Air-Purge Procedure
The outdoor unit is loaded with sufficient R-22 refrigerant for 5 metres of piping. The air in the indoor unit and in the pipe must be
purged. If air remains in the refrigeration pipes, it will affect the compressor, reduce to cooling/heating capacity and could lead to
a malfunction. Refrigerant for air purging is not charged in the outdoor unit. Use Vacuum Pump as shown at the figure.
1. Connect each assembly pipe to the appropriate valve on
the outdoor unit and tighten the flare nut.
2. Referring to the illustration opposite, tighten the flare nut first manually and then
with a wrench, applying the following torque.
Outer Diameter
6.35mm
9.52mm
12.70mm
3. Connect the charging hose of low pressure side of manifold gauge to the packed
valve having a service port as shown at the figure.
4. Open the valve of the low pressure side of manifold gauge counterclockwise.
5. Purge the air from the system 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 10minutes.
This procedure is very important in order to avoid gas leak.
Turn off the vacuum pump
Remove the hose of the low pressure side of manifold gauge.
Adding Refrigerant
Refrigerant must be added if the piping measures more than 5 metres in length.
This operation can only be performed by a qualified refrigeration specialist.
If you have used...
More than "A" metres
of piping
Less than "A" metres
of piping
Refer to the Service Manual for more details on this operation.
32 | SAMSUNG
Torque(kg . cm)
144~176
333~407
504~616
Then...
"B" of refrigerant (R-22)
must be added for each
extra metre.
The purge time is normal.
(Cont.)
Outdoor unit Indoor unit
Gas pipe side
A
Liquid pipe side
B
Vacuum
Pump
* The designs and shape are subject to
change according to the model.
MODEL A B
07/09 7.5 20
12 5.0 30
C
D