YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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Vacuum Testing and Charging
Any air or moisture in the refrigeration lines may cause a malfunction or damage to the compressor. After connecting the
indoor and outdoor units, release air and moisture from the refrigerant cycle using a vacuum pump, as shown below.
Note: To protect the environment, be sure not to discharge the refrigerant into the air directly.
How to Vacuum Air Tubes:
1. Unscrew and remove caps from 2-way and 3-way valves.
2. Unscrew and remove cap from service valve.
3. Connect vacuum pump hose to the service valve.
4. Run the vacuum pump for 10-15 minutes, until reaching a vacuum of 10 mm Hg absolutes.
5. With the vacuum pump still running, close the low pressure knob on the vacuum pump manifold.
6. Turn off the vacuum pump
7. Turn the 2-way and 3-way valve stems to fully close the valves. Disconnect the flexible vacuum pump hose.
8. Replace and tighten all valve caps.
