Adding Refrigerant - Pridiom AWS090HR Installation Manual

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Soap water method
(1) Remove the caps from the gas side and
liquid side valves.
(2) Remove the service-port cap from the gas
side valve.
(3) To open the gas side valve turn the valve
stem counterclockwise approximately 90°,
wait for about 2-3 seconds, and close it.
(4) Apply a soap water or a liquid neutral
detergent on the indoor unit connection or
outdoor unit connections by a soft brush to
check for leakage of the connecting points
of the piping.
(5) If bubbles come out, the pipes have
leakage.
Evacuation
Outdoor unit
Connect the charge hose end described in the
preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
evacuation.
vacuum pump is used
When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
Adding refrigerant
Refrigerant must be added if the piping measures more
than 7.5 metres(%") in length.This operation can only
be performed by a professional technician,for the
additional amount,see the table 3 below.
Vacuum pump
Fig.
6
Table 3
(piping length-7.5)mx30g (piping length-7.5)mx65g