User Manual

YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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VACUUM TESTING AND CHARGING
VACUUM AND LEAKAGE CHECK
VACUUM REFRIGERANT PIPES
Evacuate the pipes between indoor and outdoor units, using vacuum pump and manifold/gauge set, to a minimum of 500
microns (service valves remain front seated). Hold for 30 minutes to check if the vacuum level is maintained. Using dry
nitrogen or other leakage detection tool for leak checking. Be certain there is no pressure in the system when repairing a
leak.
Vacuum and Check Leakage before Releasing Refrigerant from Outdoor Unit to Indoor Unit