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エアコン Aire SK SeriesのPDF 取付説明書をオンラインで閲覧またはダウンロードできます。Aire SK Series 16 ページ。 Single split wall mounted air conditioner

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Air purging

Air and moisture remaining in the refrigerant

system have undesirable effects as indicated

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

refrigeration system.

Therefore, the indoor unit and tubing between

the indoor and outdoor unit must be leak tested

and evacuated to remove any noncondensables

and moisture from the system.

Air purging with vacuum

pump

Preparation

Check that each tube(both liquid and gas

side tubes) between the indoor and

outdoor units have been properly

connected and all wiring for the test run

has been completed. Remove the service

valve caps from both the gas and the liquid

side on the outdoor unit. Note that both the

liquid and the gas side service valves on

the outdoor unit are kept closed at this

stage.

Leak test

Connect the manifold valve(with pressure

gauges) and dry nitrogen gas cylinder to

this service port with charge hoses.

CAUTION

Be sure to use a manifold valve for air

purging. If it is not available, use a stop valve

for this purpose. The "Hi" knob of the manifold

valve must always be kept close.

Pressurize the system to no more than 150

P.S.I.G. with dry nitrogen gas and close the

cylinder valve when the gauge reading

reached 150 P.S.I.G. Next, test for leaks with

liquid soap.

CAUTION

To avoid nitrogen entering the refrigerant system in a

liquid state, the top of the cylinder must be higher than its

bottom when you pressurize the system. Usually, the

cylinder is used in a vertical standing position.

AIR PURGING

Do a leak test of all joints of the tubing(both

indoor and outdoor) and both gas and liquid side

service valves.

Bubbles indicate a leak. Be sure to wipe off the

soap with a clean cloth.

After the system is found to be free of leaks,

relieve the nitrogen pressure by loosening the

charge hose connector at the nitrogen cylinder.

When the system pressure is reduced to normal,

disconnect the hose from the cylinder.

Pressure

gauge

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas

cylinder(in vertical

standing position)