Centrifugal heat pump unit model: tsc079 ~ tsc126 tdc100 ~ tdc126 Refrigerant: hfc-134a ■safe operation: using McQuay efficient centrifugal compressor, patented suction guide vane plus flow block chain control and then equipped with hot gas bypass system , Fully guarantee the safety of the compressor. ■Green: the use of environmentally friendly refrigerant hfc-134a, no damaging effect on the atmospheric ozone layer. ■Intelligent control: Adopt advanced microtechtm ⅱ control system, chain control of pump / cooling tower, access to building automation system; 15-inch large color touch control screen mounted on a freely movable rocker arm, easy to operate. ■Widely used: The unit can make use of various heat sources such as river water, urban sewage, industrial wastewater, groundwater and air conditioning cooling water; hot water outlet temperature can reach 58 ℃ to meet various heating / hot water needs. ■Energy-efficient: Tianwei heat pump heating efficiency is much higher than the conventional heating system, saving users a lot of operating costs.