Sanyo SAP-C12AP Manual Do Utilizador

29

                

Air and moisture remaining in the refrigerant 
system have undersirable 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 system.

Hi

Lo

Indoor unit

Outdoor unit

Manifold valve

Pressure

gauge

Vacuum pump

Fig.35

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 completed. Noted 
    that both narrow and wide tube service valves
    on the outdoor unit are kept closed at this 
    stage.

 

2. Using a adjustable wrench or box wrench, 
    remove the valve caps from the service on
     both narrow and wide tubes.

3. Connect a vacuum pump and a manifold 
    valve (with pressure gauges) to the service 
    port on the wide tube service valve. (Fig.35)

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 evacuation:

Table 3

       Required time for evacuation when
capacity of 100 liter/h vacuum pump is used 

If tubing length is
   less than 7 m  

10 min. or more

 15 min.or more

If tubing length is
   more than 7 m