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• After adequate evacuation, open both service valves by removing both brass ser-
vice valve caps with an adjustable wrench. Insert a 3/16” [5 mm] or 5/16” [8 mm]
hex wrench into the stem and turn counterclockwise until the wrench stops.
• At this time gauges must be connected to the access fitting on the liquid line
(small) service valve and the common suction port connected to the common suc-
tion line between the reversing valve and compressor to check and adjust charge.
IMPORTANT: Compressors (especially scroll type) should never be used to evacu-
ate the air conditioning system because internal electrical arcing may result in a
damaged or failed compressor. Never run a scroll compressor while the system is in
a vacuum or compressor failure will occur.
15.2 FINAL LEAK TESTING
After the unit has been properly evacuated and service valves opened, a halogen
leak detector should be used to detect leaks in the system. If a leak is detected, the
refrigerant should be recovered before repairing the leak. The Clean Air Act pro-
hibits releasing refrigerant into the atmosphere.
16.0 CHECKING REFRIGERANT CHARGE
Charge for all systems should be checked against the Charging Chart inside the
access panel cover.
IMPORTANT: Use factory-approved charging method as outlined on the next 4
pages to ensure proper system charge.
!
WARNING
The top of the scroll compressor shell is hot. Touching the compressor
top may result in serious personal injury.
