Sanyo C1251 Benutzerhandbuch

Air and moisture remaining in the refrigerant system have

undesirable effects as indicated below. Therefore, they must

be purged completely.

●

pressure in the system rises

●

operating current rises

●

cooling (or heating) efficiency drops

●

moisture in the air may freeze and block capillary tubing

●

water may lead to corrosion of parts in the refrigerant sys-

tem

■

(1) Check that each tube (both narrow and wide tubes)

between the indoor and outdoor units have been properly

connected and all wiring for the test run has been com-

pleted. Note that both narrow and wide tube service

valves on the outdoor unit are kept closed at this stage.

(2) Using an adjustable wrench or box wrench, remove the

valve caps from the service valve on both narrow and

wide tubes.

(3) Connect a vacuum pump and a manifold valve (with pres-

sure gauges) to the service port on the wide tube service

valve. (Fig. 52)

(4) With the “Lo” knob of the manifold valve open, run the

vacuum pump. The operation time for the vacuum pump

varies with tubing length and the capacity of the pump.

The following table shows the amount of time for evacua-

tion:

The required time in the above table is calculated based on

the assumption that the ideal (or target) vacuum condition is

around 10 mmHg abs.

Hi

Lo

Indoor unit

Outdoor unit

Manifold valve

Pressure 
gauge

Vacuum pump

If tubing length is

If tubing length is

less than 33 ft. (10 m)

more than 33 ft. (10 m)

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