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Features: This equipment is used for the centralized processing of surface heating or air-conditioning thermostat signals, and transmits instructions to manage the opening/closing of the ground heating electrical valve and performs zone temperature control. At the same time controlling the electrical valve, it'd control the passive linkage of the heat pump host, the boiler and the exterior water pump(mixing center) or the active linkage management of the three-line one-control valve and the two-line valve. It can be controlled via pulling the code to administer the three-gear delay linkage control of 0~30~45~60~120s. It can assist 8-channel floor heating thermostat with 220V power supply, and the wiring is secure and convenient. It helps the demonstrate of the partition management indicator light, and the operating reputation is clear and convenient. Specifications: Voltage: AC220±10% 50/60Hz Terminal Load: max. 3A (resistive load) Power consumption: <2W Environment Temperature: 0℃~45℃ Humidity: 5~95% (no condensation) Current Load: 3A for water heating/water boiler/gas boiler Item Size: 24 * 11 * 4/ 9 * four * 1 Item Weight: 400g/ 14 Packing List: 1 * Controller