Vacuum Testing And Charging - YMGI 86 Series Installation Instructions & User Manual

YMGI: Your Modern Green Idea

VACUUM TESTING AND CHARGING

CHECK LEAKAGE BEFORE CHARGING IDU
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). Turn off manifold valve (low) to check if the vacuum level is maintained for a
minimum of 60 minutes. 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
For Multi-Zone systems repeat this process for each zone with indoor units attached to it.
If all zones are not being used, check the flared nuts on the unused valves, and ensure that they are tightened to avoid
any potential system leaks.
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