... /heating+hot water,hot water only. Water Source Heat Pump multi-function typeCooling Capacity 4.5kw-75.3kwHeating Capacity 4 ... R410a, R290, R134a, R22Characters:Anti-freeze thermos Water Source Heat Pump use underground water or circulated water or brine as main ... user side is complete also with expansion vessel, water pump and water flow switch.ELECTRIC PANELconsists of:Compressor contactor,Compressor ...