Perfectaire 1PAMSH18-MZO2-16, Руководство по обслуживанию

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3). Air purging of the charge hose.
Open the handle Lo valve of the manifold valve
slightly to purge air from the charge hose for 5
seconds and then close it quickly.
4). Set t e 2-way valve to the close position.
5). Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 0.1MPa.
6). Set the 3-way valve to the closed position
immediately
Do this quickly so that the gauge ends up indicating
0.3 to 0.5Mpa.
Disconnect the charge set, and tighten the 2-way
and 3-way valve’s stem nuts.
Use a torque wrench to tighten the 3-way valves
service port cap to a torque of 18N.m.
Be sure to check for gas leakage.
2. Air purging with vacuum pump
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.
Connect the charge hose with the push pin of
handle lo to the 3-way valves gas service port.
Connect the charge hose of handle hi connection
to the vacuum pump.
Fully open the handle Lo of the manifold valve.
Operate the vacuum pump to evacuate.
Make evacuation for 30 minutes and check
whether the compound meter indicates -0.1Mpa.
If the meter does not indicate -0.1Mpa after
pumping 30 minutes, it should be pumped 20
minutes more. If the pressure can’t achieve -
0.1Mpa after pumping 50 minutes, please check if
there are some leakage points.
Fully close the handle Lo valve of the manifold
valve and stop the operation of the vacuum pump.
Confirm that the gauge needle does not move
(approximately 5 minutes after turning off the
vacuum pump).
Turn the flare nut of the 3-way valves about 45°
counterclockwise for 6 or 7seconds after the gas
coming out, then tighten the flare nut again. Make
sure the pressure display in the pressure
indicator is a little higher than the atmosphere
pressure. Then remove the charge hose from the
3 way valve.
Fully open the 2 way valve and 3 way valve and
securely tighten the cap of the 3 way valve.
5.7 Evacuation after servicing the outdoor
unit refrigeration circuit
1. Evacuation of the complete refrigeration
circuit, Indoor and outdoor unit.
Procedure:
1). Confirm that both the 2-way and 3-way valves
are set to the opened position.
2). Connect the vacuum pump to 3-way valve’s
service port.
3). Evacuation for approximately one hour.
Confirm that the compound meter indicates -
0.1Mpa (500 Microns / 29.9 in,hg).
4). Close the valve (Low side) on the charge set,
turn off the vacuum pump, and confirm that the
gauge needle does not move (approximately 5
minutes after turning off the vacuum pump).