need help on how to isolate hussmann R-22 low temp rack condenser coils, without using recovery machine.
it has in series heat reclaim coils with condenser coils. 4 copeland compressors.S# NS-18-79 /F.O.NO 802581-31
if front seated King valve at receiver, how to pump down condenser refrigerant into the receiver?
there is ball valve after the reclaim valve to condenser, if valve off still would not push out gas in condenser coils.
have done many low side isolation before but never on hi side.
found a small leak at rooftop the condenser coils and planning to repair it sometime next week.