Vacuum tube solar water heaters are widely used for their efficient heat collection performance, but components such as vacuum tubes and water tanks are susceptible to environmental influences and require targeted maintenance. The following is a detailed maintenance plan for vacuum tube solar water heaters: 
1、 Vacuum tube cleaning and inspection 
1. Cleaning frequency and method 
-Clean the vacuum tube every 2-3 months, and in areas with high dust, reduce it to once a month. When cleaning, use a soft cloth or sponge dipped in clean water to gently wipe the surface of the vacuum tube to remove dust, dirt, and scale; If there are stubborn stains, you can use diluted neutral cleaner to wipe them off, and then rinse them off with clean water. 
-It is strictly prohibited to use sharp tools such as steel wire balls to prevent scratching the outer coating of the vacuum tube and affecting the heat collection efficiency. 
2. Vacuum tube inspection 
-Regularly (monthly) inspect the appearance of the vacuum tube to see if there are any damages, cracks, or whitening phenomena. If the vacuum tube is found to be damaged, the inlet valve of the water heater should be immediately closed, the hot water in the system should be drained, and a new tube should be replaced in a timely manner to avoid affecting the overall performance and the risk of water leakage. 
-Check the sealing gasket at the connection between the vacuum tube and the water tank. If aging, deformation, or water leakage is found, the gasket should be replaced in a timely manner to ensure good sealing and prevent heat loss and water leakage. 

2、 Water tank maintenance 
1. Water level and water quality management 
-Maintain the water level in the water tank within a reasonable range, avoid long-term operation at low water levels, and prevent damage to the vacuum tube caused by exposure to sunlight; Regularly (quarterly) check the water quality in the water tank. If there is a lot of scale, it needs to be cleaned. 
-For areas with hard water quality, it is recommended to install water softening devices to reduce scale formation and extend the service life of water heaters. 
2. Inspection of water tank components 
-Check the inlet and outlet pipes and exhaust holes of the water tank every month for smoothness, blockage, and leakage; Check if the insulation layer of the water tank is intact. If the insulation layer is damp or damaged, it should be repaired or replaced in a timely manner to reduce heat loss. 
-Regularly (every six months) check the magnesium bars inside the water tank, which can slow down the corrosion of the water tank and vacuum tubes. If the magnesium rod is severely consumed, it should be replaced with a new one in a timely manner, usually every 1-2 years. 
2025072316723440.jpg 
3、 Pipeline system maintenance 
1. Pipeline inspection 
-Inspect the appearance of pipelines every quarter to check for aging, damage, and deformation, and promptly repair or replace any problems found; Check whether the fixed bracket of the pipeline is firm to prevent the pipeline from shaking or falling off. 
-Check if the insulation layer of the pipeline is intact. If the insulation layer is damaged, wrap it with insulation material in a timely manner, especially in cold seasons, to prevent the pipeline from freezing and cracking. 
2. Maintenance of valves and connectors 
-Regularly inspect the valves on the pipeline (such as globe valves, safety valves, etc.) to ensure that the valves are flexible in opening and closing, without leakage or rusting; Check the pipeline connections, such as joints, flanges, etc. If there is any looseness or leakage, tighten or replace the seals in a timely manner. 
4、 Control system maintenance 
1. Controller inspection 
-Check monthly whether the controller display is normal and whether various parameters (such as water temperature, water level, etc.) are displayed accurately; Clean the dust on the surface of the controller, maintain good ventilation, and avoid affecting heat dissipation and normal operation due to dust accumulation. 
-Check whether the alarm function of the controller is normal, such as low water level alarm, abnormal water temperature alarm, etc., to ensure that the alarm can be issued in a timely manner when the system fails. 
2. Sensor maintenance 
-Check the water temperature and level sensors for normal operation every six months. The sensor probes are susceptible to scale and impurities, and can be cleaned regularly to ensure accurate measurement data. If the sensor malfunctions, it should be replaced promptly. 
5、 Seasonal and special circumstances maintenance 
1. Seasonal maintenance 
-Winter: In areas with temperatures below 0 ℃, anti freezing measures should be taken. Electric heat tracing can be installed to insulate pipelines or drain water from the water heater; Clean up the snow on the top of the vacuum tube and water tank in a timely manner after snowfall to avoid snow crushing the vacuum tube or affecting the heat collection effect. 
-Summer: In hot weather, avoid leaving the water heater exposed to the sun for a long time. You can add cold water appropriately to lower the temperature of the water tank; Regularly check the heat dissipation of the water tank to prevent damage to the water tank and vacuum tube due to high temperature. 
2. Handling of special circumstances 
-After encountering extreme weather such as rainstorm, hail and strong wind, comprehensively check whether the vacuum pipe, water tank, support and other parts are damaged; If problems such as vacuum tube rupture or bracket deformation are found, contact professional personnel for repair in a timely manner. 
-When the water heater is not used for a long time, the inlet valve should be closed, the water in the water tank and pipeline should be drained, the power should be disconnected, and the vacuum tube and water tank should be covered with dust-proof cloth to prevent dust and debris from entering. 
6、 Professional maintenance and recording 
1. Professional maintenance: It is recommended to have professional technicians conduct a comprehensive inspection and maintenance of the vacuum tube solar water heater once a year, including system pressure testing, circuit testing, vacuum tube performance evaluation, etc., to ensure the safe and efficient operation of the system. 
2. Maintenance records: Establish detailed maintenance records, recording the time, content, problems discovered, and handling of each maintenance, to facilitate tracking of the operation status of the water heater and provide reference for subsequent maintenance.