Pioneer WAE009AMFI15RL, Service Manual

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23
6.4 Installation for the first time
Air and moisture in the refrigerant system will
cause undesirable effects as below:
●
Pressure in the system rises.
●
Operating current rises.
●
Cooling or heating efficiency drops.
●
Moisture in the refrigerant circuit may
freeze and block capillary tubing.
●
Water may lead to corrosion of parts in the
refrigerant system (compressor damage).
Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak
tested and evacuated to remove the air and
moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral
detergent on the indoor unit connections or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping. If bubbles come out, the pipes have
leakage.
1. Air evacuation using a vacuum pump
1) Completely tighten the flare nuts of the
indoor and outdoor units, confirm that both
the 2-way and 3-way valves are set to the
closed position.
2) Connect the charging manifold's Low Side
hose with the push pin to the 3-way valve's
gas service port. (it is a 5/16" SAE Port).
3) Connect the charging manifold's Center
hose the vacuum pump.
4) Fully open the Low Side Valve of the
manifold.
5) Operate the vacuum pump to evacuate.
6) Make evacuation for 30 minutes and check
whether the compound meter indicates
-0.1Mpa(14.5Psi) . If the meter does not
indicate -0.1Mpa(14.5Psi) after pumping 30
minutes, it should be pumped 20 minutes
more. If the pressure can’t achieve
-0.1Mpa(14.5Psi ) after pumping 50 minutes,
please check if there are some leakage
points. Fully close the Low side valve of the
manifold and stop the vacuum pump.
Confirm that the gauge needle does not rise
(approximately 15 minutes after turning off
the vacuum pump).
7) Turn the 3-way valve's stem about 45°
counterclockwise to open a little for 6 or 7
seconds. Then tighten the valve stem again.
Make sure the pressure display in the
pressure indicator is a higher than the
atmosphere pressure. Then remove the
charge hose from the 3 way valve.
8) Fully open the 2 way valve and 3 way valve
and securely tighten the caps of both valves.
CHECK FOR LEAKS AGAIN.
2. Air purging by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way
valves are set to the closed position.
2). Connect the charge manifold set and a
charging cylinder to the service port of the
3-way valve (5/16" SAE Port).
3). Air purging.
Open the valves on the charging cylinder and
the charge manifold set. Purge the air by
loosening the flare nut on the 2-way valve
approximately 45’ for 3 seconds then closing it
for 1 minute; repeat 3 times.