Part 4 Trouble Shooting

3. Evacuation

Indoor unit

Liquid side

 

 

 

 

 

Outdoor unit

 

3-Way

 

 

valve

Open

 

Gas side

 

 

3-Way

 

 

valve

Open

Vacuum pump

Vacuum

 

Lo

 

OPEN

Gage

 

 

 

 

OPEN

 

Procedure

(1)Connect the vacuum pump to the center hose of charge set center hose

(2)Evacuation for approximately one hour.

Confirm that the gauge needle has moved toward 0.8 Torr (2PSF).

(3)Close the valve (Lo side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approxima- tely 5 minutes after turning off the vacuum pump).

(4)Disconnect the charge hose from the vacuum pump.

Vacuum pump oil.

If the vacuum pump oil becomes dirty or depleted, replenish as needed.

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Only for training and service purposes

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