The control method; DDC controller outlet temperature or room temperature according to the new fan temperature sensor and setpoint deviation compared with PID law regulating cold / hot water valve opening in order to control freezing (heating) water conditioning units Uses summer temperature is below 28 ℃ the room air-conditioning unit, the winter is higher than 16 ℃. Front compensation using outdoor air fed to eliminate the influence of temperature on the output. Air conditioning unit in the transition season price, you can stop adjusting the temperature of the air to save energy 6 out of water in the air conditioning units outside air conditioning units must be equipped with valve offer to cut off the cold (hot) water to regulate the flow and overhaul; 7, When the unit when the choice of humidification, humidification inlet valve should be installed and requires a substantially constant water pressure; weight 8, with the unit connected air duct and water pipes shall be borne by the unit; 9, each insulation wall air conditioning unit front panel installation, check the fan impeller rotation direction is correct specification of air conditioning units | Chenyu air conditioning (certified) | air conditioning unit provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.