The faults are as follows: (1) Nozzles and spray pipes are blocked by dirt. Due to factors such as dust in the air of the central air conditioning system and poor quality of chilled water, the nozzles and spray pipes in the spray chamber of the air conditioning system are easily blocked, causing a decrease in water volume, a reduction in the sprinkling coefficient, and affecting the heat and moisture exchange effect of the air. Regularly clean the spray chamber, nozzles, and spray pipes. When cleaning the nozzles, remove the nozzles and use high-pressure water to backflush them or soak and brush them to remove dirt from the nozzles. In addition, non-toxic corrosion inhibitors or anti-corrosion and anti-mildew agents can be added to the chilled water or winter circulating water to control the growth of bacteria in the spray water. (2) The spray pump in the spray chamber does not supply water. The failure of the spray pump not supplying water is a major fault of the spray pump and also a major fault of the spray chamber, which prevents the air from being cooled by the chilled water. This is mainly due to air inside the pump and poor sealing. First, release the air inside the spray pump and fill it with water; then check the water level in the water storage pool of the spray chamber; after these conditions are normal, start the pump and check the pump pressure. You can also check the shaft seal of the spray pump to see if there is any water leakage. If the seal is not tight, air will enter the pump during pump operation, causing the pump not to supply water. This fault can be handled by tightening the adjustment screws of the mechanical seal or replacing the packing. For pumps with larger diameter makeup water pipes, makeup water can be used to flush out the air inside the pump. (3) Cracks in the nozzles of the spray chamber. After using the nozzles in the spray chamber for a period of time, they may crack due to material issues, processing cracks, uneven installation stress, and excessive water pressure. After the nozzle cracks, chilled water with certain pressure will shoot out from the side of the nozzle, usually wetting the filter material in front of the spray chamber, or allowing chilled water to enter the oil filter tank, making the filter ineffective. There may also be leaks at the inspection door of the spray chamber, causing water running in the machine room. Such accidents can be prevented by frequently checking the nozzles, and the nozzles can be replaced after shutting down the pump. (4) Scale formation on the water-blocking plates. Under the influence of hard water quality of chilled water or circulating water, scale easily forms on the surface of the water-blocking plates, reducing the flow area of the water-blocking plates and affecting the airflow. This type of fault can be solved by cleaning the water-blocking plates and removing the dirt. Softened water can also be added to the chilled water and circulation water as a preventive measure. (5) Water loss caused by deformation of the water-blocking plates. The water-blocking plates in the spray chamber may deform under external forces, reducing the efficiency of the water-blocking plates, causing water loss in the fan room, and losing air conditioning cooling capacity. The water-blocking plates can be removed, straightened, and reassembled.
Beijing York Air Conditioning After-sales Service Center edited and organized on September 23, 2011. York Air Conditioning Repair Guide: How to determine the fault of the spray chamber.