... heat pump,4.5-75kw,changed freely from many running mode:cooling,heating,hot water only.cooling/heating+hot water Water Source Heat Pump ... R410a, R290, R134a, R22Characters:Anti-freeze thermos Water Source Heat Pump use underground water or circulated water or brine as main ... for mod. 4.5-14), gas-liquid separator, high pressure switch and low pressure switch.The heat pump units are complete also ...