1. CONNECT MANIFOLD GAUGE SET TO COMPRESSOR
2. PLACE FREE END OF CENTER HOSE IN A SHOP
3. DISCHARGE SYSTEM
(a) Slowly open the high pressure hand valve to adjust the refrigerant flow. Do not open valve very much.
CAUTION: If refrigerant is allowed to escape too fast, compressor oil will be drawn out of the system.
(b) Check the shop towel to make sure no oil is being discharged.
If oil is present, partially close the hand valve.
(c) After the manifold gauge reading drops below 3.5 kg/ cm3 (50 psi, 343 kPa), slowly open the low pressure valve.
(d) As the system pressure drops, gradually open both high and low valves until both gauges read 0 kg/cm1 (0 psi,0 kPa).
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