... heating,cooling/heating+hot water,hot water only. Water Source Heat Pump multi-function typeCooling Capacity 4.5kw-75.3kwHeating Capacity 4 ... R407C, R410a, R290, R134a, R22Characters:Anti-freeze thermos Water Source Heat Pump use underground water or circulated water or brine as main ... separator, high pressure switch and low pressure switch.The heat pump units are complete also with 4-way valve and one ...