Air water heater unit water temperature is generally set between 50 ℃ ~ 60 ℃, occasionally higher than 60 ℃ below 65 ℃ also belongs to the allowable range, but operating conditions may affect the life of the unit. Pictured: Air water heater Problem Description Set the water temperature or temperature rise slow. However, some air to water heater works more than the design time of the unit is still not up to the water temperature, only barely direct use of hot water or even can not be used, the measured temperature is about 40 or lower, the system å± ring pump constantly ring, temperature Not seen rising. Analysis of the problem of rising water temperature The water heater must be from the outside to get the heat, the air heater water temperature can not go there are two possible. First, the loss of heat is equal to or greater than the influx of heat, when the two are equal, the water temperature remains unchanged. Heat loss also includes two possibilities. First, the insulation is not enough quality and nature of the temperature difference is too large, heat loss is serious, especially the water inlet seal is not strict insulation is not good or hidden part of the insulation is not done, the external takeover insulation and the box insulation will increase the heat loss is not continuous. Another kind of heat loss of air to water heater hot water out at the same time cold water fill, this heat loss often appear in the tank design. For water requirements for 24 hours of uninterrupted, such as passenger traffic larger hotels, haircut and other water customers, cold water rushed into the tank, hot water ready to use. In the air heat pump hot water unit does not appear the problem, once the weather suddenly becomes cold, air to water heater unit doubled from the heat in the air, while customers increase the amount of hot water, then left in the air to the water heater tank In the heat is not enough, it shows the difficulty of rising water temperature, and even cold water phenomenon. Second, the host refrigerant carrying capacity is poor, resulting in a single ring effectively carry less heat exchange. One of them may be improper refrigerant selection. The air-to-water heater uses different physical and chemical stability than the traditional air-conditioning refrigerant, which is also one of the core technologies of air-to-water heater technology. Part of the air to water heater products using the market, the refrigerant does not have this feature, it is not surprising that in the case of external temperature decreases fatigue phenomenon. Another possibility is that the charge of the refrigerant is small or partially leaked and becomes less capable of carrying heat. Formal manufacturers of air to water heater products constant pressure quantitative refrigerant, have been tested by the factory one by one to ensure that the host of the compressor in a variety of conditions have a more stable ability to work. The same batch of air to water heater spot checks the status of a single test, to mark the certificate, date of manufacture, number and so on. In the transport of products, there are cases of not moving according to the label, so that part of the refrigerant leak missing, not work, will result in water temperature reaches the design of the water temperature. Solution should first check to see if daily water consumption is excessive, the configuration is not a problem. Each 1kg of domestic water increased by 1 ℃ absorb 1Kcal heat equivalent to 1.163 × 10-3KWh, both 1000Kg water up 1 degree, to be absorbed 1.163KWh of heat. The calculation formula is as follows: water quantity (ton) × temperature difference ℃ × 1.163 / air heat pump unit power Kw × COP value ≤ design working time (hours) For example: cold water temperature is 15 ℃, outlet temperature is set at 55 ℃, air to water heater unit The power is 2.2KW and the COP value is about 2 when the temperature in winter is low (data released by the manufacturer of the product), and the designed water consumption is 1 ton, then the working hours of the air-to-water heater unit is 11 hours. If there is no problem in the unit configuration, It can cut off the water circulation between single machine and water storage tank, start the air-to-water heater unit, and detect the heat collection capacity of single machine. If the temperature does not reach the highest temperature on the nameplate, it may be a refrigerant problem. Check the refrigerant pressure, the control factory data sheet, if the pressure is low, the performance of the refrigerant is lost, according to the original model refrigerant added to the factory standard quantity can be.