CWZ series medium-low temperature screw chiller unit can provide medium-low temperature refrigerant from -35℃ to -5℃, which is suitable for places with various medium-low temperature cold source demands, such as in the production process of medicine, chemical industry, metallurgy, electronics, foodstuffs, etc., and can also be used as the cold source mainframe of large-scale cold storage and ice field. The heat recovery type unit has added the polyheater technology on the basis of the standard type, which fully recovers the sensible heat in the compressor exhaust, so that the equipment not only meets the demand of the cold source, but also provides high-grade hot water of 50~70℃ for living or heating. Temperature range of liquid supply -5℃~-35 Cooling capacity 49.9kW~2122kW