Used 30 Ton Dunham-Bush portable chiller. Model IPWL-030-0. High side pressure 400 psi, low side pressure 135 psi. 460 volt 3 phase, 60 HZ. Control voltage 115/1/60. Refrigerent R502. With (1) compressor model 359LFN crankcase heater 200W, 115 volt, 1 phase, 60 HZ