York YHAC Unit - Origin: Guangzhou refrigerants: HCFC-22 Model: 20,25,33,40,50,60,80 Cooling capacity :19-81kW heating capacity :19-80kW single cold and heat pump water system for the election components for the election: YHAC50 the following water systems built, YHAC50-80 external YHAC water system to control central air conditioning units advanced series: 1, can be easily carried out in the room on the unit parameters and the status is set; 2, the controller clock display. Can set the timer switch, and a day, month, day, hour, minute display. 3, easy maintenance: controller fault code more clear, can easily determine the fault content. To assist maintenance personnel in the shortest possible time troubleshooting advanced control features are summarized: 1, hardware unified, single and double drive system uses the same hardware, different units, but different software, easy maintenance and procurement management. 2, the hardware reliability: the controller power is 86 ~ 264VAC switching power supply, high efficiency, no heat, never fear for burnt; eight relay outputs, each 10A/7A 277VAC 50/60Hz, directly with the pump, fan (300W or less) and other loads. 3, water protection control (water-cooled unit only) 4, fan, power failure protection control 5, 6, protection and control high-pressure compressor and low pressure protection control 7, 8 anti-frequent start control, automatic temperature control: temperature in any mode boot stops means 9, the winter standby in order to prevent water pipes, pumps cracking, according to outdoor temperature and automatically pumps water temperature or heat pump operation.