... Packaged water source heat pump (water to water) 4.5kw-75kw,LCD automatic controller,famous scrow compressor, energy saving. Water Source Heat PumpCooling Capacity 4 ... , R410a, R290, R134a, R22Characters:Anti-freeze thermos Water Source Heat Pump use underground water or circulated water or brine as main ... mod.4.5-6.5), single phase (mod. 8) and 3-phase (mod.10-75) scroll type compressors, with built-in ...