The oil separator type 500 and 600 should be installed in the discharge line between the compressor and the condenser mounted securely in a vertical position as close to the compressor.
To prevent the return of refrigerant from condenser, during the off cycle of the system, it's advisable to install a check valve between the condenser and oil separator outlet connection. Oil separator performs best when operating at or near
the compressor discharge temperature. In location the oil separator, choose a position to avoid, as far as possible, chilling of the shell, which may result in condensing of liquid within the separator. If this is not possible, it is advisable to supply the separator with the better solutions (insulation,
strap heater, others) to prevent the refrigerant in the system from the condensing in the shell (specially in low temp. application). Before the oil separator is installed, either 500 or 600, an initial charge of oil should be added to it. Refer to general characteristics of oil separators or to instruction sheet for the proper amount of oil. Oil pre-charge is very important, failure to pre-charge separator sump may result in damage to the oil return float mechanism. Use the same type of oil that is in the compressor crankcase.