When you need a new air cooling unit type, the thermostat into the cooling mode, when the temperature sensor reaches or falls below the set temperature, the thermostat to the electric valve shut off valve contacts a valve signal, turn valve electric valve shut down. If the measured temperature does not reach the set temperature, the thermostat to the electric valve open valve signal a new air handling units offer electric valve open contacts connected valve opens. Heating when required, the thermostat set new air unit in heating mode, when the temperature sensor measurements at or above the set temperature, the thermostat to the electric valve shut off valve contacts a valve signal, the electric valve is turned on the valve closes. If the measured temperature does not reach the set temperature, the thermostat valve is an open valve to the electric signal, the electric valve open contacts connected valve opens. Antifreeze and interlock in winter outdoor design temperature is below 0 ℃, you should consider freezing problems coil. In addition to the air conditioning system design preventive measures should be adopted in itself, sales of new air unit from electrical and control unit, it should adopt certain measures. 1) limit the hot coil electric valve minimum opening in coil selection to meet certain requirements of the situation, in order to limit the hot coil electric valve minimum opening. Especially for the two control system of hot and cold dual-coil, especially, after the minimum opening should be set within the coil to ensure the water does not freeze the minimum amount of water Wmin; 2) Set the temperature control which is to prevent freezing during operation Another measure of the cracking coil. Usually in hot water outlet pipe plate (or coil on backwater even me) to set up a temperature sensor (controller), measuring the return water temperature. When they measured values ??as low as about 5 ℃, frost controller action to stop the air conditioning units running at the same time to open a large hot water valve. The new air unit models | Baoji new air unit | Rui Xincheng Rui Xincheng air conditioning provided by the Texas Air Conditioning Equipment Co., Ltd .. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Rui Xincheng air conditioning and you hand into the brilliant, for a better future!