Wuhan Qi people Compressor Repair Services Limited is a professional refrigeration compressor maintenance company with a registered capital of 1 million, the company's business, including maintenance of all imports of refrigeration compressors and air compressor, sales of second-hand imported compressor and refrigeration units ordered a variety of craft and ultra-low-temperature unit. The company's strong technical force, has a professional service technician, Mr. Zhang Yanchun founder and technical director of the company's refrigeration industry experts are engaged in the refrigeration industry for 45 years, served as Wuhan New World Refrigeration Engineering and Director of Engineering Services Limited Project Manager and later served as US Hartford compressor plant in Yantai plant production director, and Dunham-Bush service companies such as Southwest regional manager positions, the incumbent People Services Limited Wuhan Qi legal and technical director of the compressor. Dunham-Bush full closure screw chillers Operating Instructions 1, before the host boot, should first freeze, coolant pump is turned on, ensure access to water pressure within the normal range. 2, start the host, look at the analog project target, if the target does not move, you should check whether the alarm unit should disarm the alarm is reset, the target will change, indicating that the unit has entered the start the timer status, the target will rise 20%, would have to wait about three minutes, the compressor will run first. 3. After the first compressor is started, the exhaust gas pressure should rise rapidly, within two minutes, the exhaust gas pressure should be higher than the suction pressure is greater than 200kpa above. If the exhaust pressure rises slowly, should be properly closed condenser water valve, so that the difference between the discharge pressure and suction pressure as soon as more than 200kpa. After the normal operation of the unit, should the exhaust pressure control between 1050--1450kpa, crew After the start, you should open the cooling tower fan discharge pressure based on the number of units. 4. When the ambient temperature is below 26 degrees, the compressor before starting the water of the condenser should be more than 90% valve closure; ambient temperature is greater than 32 degrees, can not close the valve. Compressor running 15 minutes or so, should be appropriate to open the cooling tower fan. 5. After the unit into the normal state, the best value 1100--1300kpa exhaust pressure, exhaust pressure exceeds 1450kpa, super load operation of the compressor discharge pressure is lower than 1050kpa, compressor oil is not conducive to return. 6. When turned off, the host should be closed after 10 minutes, before they can turn off the cooling water pumps, chilled water pumps.