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Installation
3. Open the valve of the low pressure side of
manifold gauge anticlockwise.
4. 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, 5 torr) 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.
5. Set a valve cork of liquid and gas service port to
the open position.
Step 3.4 Adding refrigerant
If you use a pipe longer than the length specified in
the piping codes and standards, you must add 10
g(for ✴✴09/12✴✴) and 20 g (for ✴✴18/24✴✴) of
refrigerant R-22 for each extra meter. If you use a
pipe shorter than the length specified in the piping
codes and standards, the evacuating time is normal.
Refer to the Service Manual for further details.
CAUTION
The remaining air in the Refrigeration cycle,
which contains moisture, may cause malfunction
on the compressor.
Always contact the service centre or a
professional installation agency for product
installation.
DB68-06031A-01_A5.indd 42 4/18/2017 9:00:03 AM
43


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