Product Name: Water Screw ChillerModel Number: PG52Place of Origin: ChinaFeatures: 1) Applicable area for shops, hotels, office areas, restaurants, office buildings, and modern factories 2) Refrigerating capacity: 105kW - 1,605kW 3) Refrigerating agent: R22, R134a, R407c Capacity of compressor can be adjusted, capacity control valve that can be controlled accurately is set in the system to adjust the secondary refrigeration amount compressed by the compressor according to load change of unit. The capacity modes are divided into four-step control (25%, 50%, 75%, 100%)or stepless capacity control(this function should be indicated specially in the order). High accuracy capacity can be adjusted to save direct operating cost for customers. Two kinds of operating interfaces (i.e. ordinary button or touch screen button) are optional and can be connected with computer interface through RS-485 standard serial communication port so as to realize automation of buildings and thus realize remote control of computer. Semi-isolated screwed product adopts phase sequence protector for control due to special structure. The unit has overload, overheat, open phase, short circuit, compressor electric machine winding thermal protection. High voltage and low voltage protections are set in refrigeration agent system of the unit. Water cut-off protection: water flow switch is supplied with the equipment to guarantee that the unit will turn off automatically for protection purpose if the frozen water or cooled water flow capacity or water is cut off so as to avoid damage to compressor. Utralow temperature protection of the frozen water. Automatic electric heating of compressor. Self-locking function: if the safety device of the unit runs, the unit will turn off automatically for protection purpose. Password function: the set value can be modified only by authorized personnel.