What is a three-phase three-wire power supply? What is the three-phase four-wire power supply? Three-phase three-wire connection is a three-phase AC power supply from the terminal 3 of the coil wire leads 3 Xuzhou central air conditioning maintenance, the other will 3 coil tail end together, known as a star-connected Xuzhou central air conditioning repair parts, common symbols "Y" indicates that this leads to three wire power mode called three-phase three-wire system. If further from the junction of three coils and then leads a trailing wire, which leads to four wire power supply system called phase four-wire mode. What is the phase line (or FireWire)? What is the middle (or neutral)? Junction 3 trailing called the midpoint of wire leads from the point called neutral or zero line. From 3 ends with wire leads call or line. Refrigerator repair and maintenance works: The air is cooled to a temperature below the dew point, the water vapor in the air condenses into water that is. The condensate exclude reheating can get low air humidity. Cooling air source can be used refrigerant freezers, ice or brine, modern refrigeration dehumidifier usually dedicated refrigeration compressor refrigeration dehumidifier. High standard refrigeration dehumidifier principle humidity concepts. The refrigerant cycle system: evaporator liquid refrigerant absorbs heat in the water and begins to evaporate, forming between the refrigerant and the water a certain temperature difference of the central air-conditioning renovation Xuzhou, liquid refrigerant has completely evaporated into gas, after compression machine suction and compression (pressure and temperature increase) central air conditioning, the gaseous refrigerant passes through the condenser (air / water) absorbs heat, condenses into liquid. Through the expansion valve (or capillary tube) after throttling into the low temperature low pressure refrigerant into the evaporator, the refrigerant cycle is completed. Xuzhou brand central air conditioning prices, central air conditioning, refrigeration provided by Xuzhou Sheng Erda 圣尔达 Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, Xuzhou in Jiangsu Province of heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Sheng Erda refrigeration into the brilliant and you work for a better future!