Compressor Oil Coolers
A compressor oil cooler (or other external heat load) should be connected into the after cooler circuit after the water has left the after cooler. The return line back into the circuit should be placed before the thermostat. If full flow is not needed to the compressor oil
cooler, a bypass line along with any necessary valves can be installed in parallel with the compressor oil cooler. The additional heat load into to the after cooler circuit needs to be included when sizing the radiator. The additional restriction of the compressor oil cooler and bypass must be included in the circuit’s external restriction