Maintenance of hot water system of solar water heater in winter

 

To avoid the suspension of the water circulation system and stuffy sun, stuffy sun will make the internal temperature of the collector too high, which will lead to the destruction of the endothermic coating, the deformation of the insulation layer of the box body, the rupture of the glass panel and other phenomena.

For vacuum tube solar water heaters, often check the vacuum degree of the vacuum tube or whether there is damage to the internal glass. The black barium-titanium getter on the tube indicates that the vacuum of the tube is reduced and the collector tube needs to be replaced. The vacuum tube reflector plate should also be cleaned.

The cause of the stuffy sun may also be the blockage of the circulating pipe; Natural circulation system may also be the lack of cold water supply, the water level in the heat storage tank is lower than the upper circulation pipe caused by; In a forced circulation system, it may be because the circulating pump stops working.

For the solar hot water system with auxiliary heating device, it should be checked regularly whether the auxiliary heating device is working normally. For the auxiliary heat source of electric heating pipe heating, it is necessary to ensure that the leakage protection equipment works reliably before running, otherwise it can not be used. For the heat pump - solar hot water system, it should be checked whether the heat pump compressor and fan are in production operation, no matter what part of the problem should be promptly removed.

Regularly remove the dust and dirt on the glass cover plate of the solar collector, and keep the cover plate clean to ensure a high light transmittance. Pay attention to check whether the transparent cover is damaged, if damaged, it should be replaced in time.

When the temperature is lower than 0℃ in winter, the water in the collector should be emptied instead of the plate type system with antifreeze. Equipped with antifreeze forced circulation system, only need to start the antifreeze liquid system, do not have to empty the water in the system.

Regularly carry out system blowdown to avoid pipeline blockage, and clean the water tank to ensure the cleanliness of water.

Check whether the pipes, valves, floating ball valves, solenoid valves, connecting hose and other signs of leakage, and whether the heat-absorbing coating of the collector is damaged or peeled off. All support, pipelines and other annual maintenance, to avoid damage and corrosion.