Daewoo DSB-071LH Manual Do Utilizador

14

1. Attach the charge hose end described in the leak test

area to a vacuum pump to evacuate the tubing and indoor
unit.  Confirm the “Lo” knob of the manifold valve is open.
Then, run the vacuum pump. The operation time for evac-
uation varies with the tubing length and capacity of the
pump. The following table shows the amount of time for
evacuation:

2. When the desired vacuum is reached, close the “Lo” knob

of the manifold valve and stop the vacuum pump.

1. With a hex wrench, turn the narrow tube service valve

stem counter-clockwise to fully open the valve.

2. Turn the wide tube service valve stem counter-clockwise

to fully open the valve.

To avoid gas from leaking when removing the charge hose,
make sure the wide tube service valve is fully open and
turned all the way out.

3. Loosen the charge hose connected to the wide tube ser-

vice port slightly to release the pressure, then remove the
hose.

4. Replace the threaded cover on the wide tube service port

and fasten it securely. This process is very important to
prevent gas from leaking from the system.

5. Replace the valve caps at both wide and narrow service

valves and fasten them securely.

This completes air purging with a vacuum pump. The air
conditioner is now ready to test run.

Lo

Hi

Pressure
Gauge

Manifold Valve

Outdoor Unit

Indoor Unit

Charge Hose

Vacuum
Pump

If tubing length is less than 

33 ft. (10 m)

If tubing length is longer than 

33 ft. (10 m)

Required time for evacuation when 30 gal/h vacuum 

pump is used