I am working on a Hitachi RP-15WLS unit that has had its screw compressors removed and replaced with a Carlyle 06DA5372BA reciprocating compressor with Sea water cooled condenser. The evaporator has a cooling capacity of 32.6kW and is served by two TE5 expansion valves (no.0.5 and no.1). The system uses R407C and the discharge pressure is about 18 bar while the suction pressure works down from 3.2bar. There is a long run from the compressor to the expansion valves/evap (30 meters). The condenser is of ample size and clean and there is a good charge of gas. Any advise would be very welcome.