Use of air conditioning installation of air conditioning divisions tubes branch pipes can cross loading or vertical loading, when the angle between the horizontal transverse mounted charge ports shall be less than 15 degrees; when vertical loading, the face of the two charge ports, port charge any angle between the vertical line must be less than 15 degrees; after two charge ports shall ensure that straight sections of pipe 60 cm or more; small branch pipes can not replace big branch pipe. Under what circumstances the central air-conditioning and fluoride? Try: home central air conditioning fan coil cleaning Baoding half an hour after opening, whether it can reach the set temperature (cooling capacity to match with the room air conditioning), while running lamp is lit off for a while (like refrigerator compressors, like open while stopped while) Beijing fan coil cleaning, otherwise, but the lack of fluoride phenomenon. Second test: The thermometer indoor unit inlet and outlet temperature difference, the difference is more than 10 degrees, even if the normal central air-conditioning maintenance. The difference between the effect of a good air-conditioning up to 15 degrees. Small temperature difference is the lack of fluoride. Three to see: home central air-conditioning fan coil 15 minutes after power washing, open the indoor unit panel, you should see a uniform covered with condensed water on the evaporator, if half of the children do not freeze or frost is not normal.