I don't know if the hole you mentioned next to the water inlet is on the water tank. If it is the overflow hole, it means that the water in the water tank is full and the water tank is full. the water overflows. When you see water coming out of the overflow hole, you should turn off the water supply valve.
Solar water tanks generally have six or five holes. The water tank is generally cylindrical. There are two holes on each side of the cylinder. Generally, it is divided into upper and lower holes. If one side is used, the upper hole is the water inlet hole, the lower hole is the water outlet hole, the lower hole on the other side is blocked, the upper hole is the overflow hole -full or the bottom hole on one side is the water inlet hole; the bottom hole on the other side is the water outlet hole. The top hole is an overflow hole.
There are twox holes on the cylinder surface. Once the water tank is installed, the bottom one is approximately 50mm in diameter and is an electric heater hole. There is also a hole on the top surface. of the water tank with a diameter of approximately 20 mm and constitutes an exhaust hole. You said: "The solar water tank has three holes, in addition to the water inlet and outlet holes, there is another hole. For example, there is an exhaust hole on the upper side of the water tank and an electric heating hole on the lower side.
The solar water heater is a heating device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet the use of hot water by people in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters based on their structural shapes. Water heatersVacuum tube filters are mainly used, accounting for 95% of the domestic market share.
Home evacuated tube solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into thermal energy mainly relies on vacuum tubes which use the principle that hot water is used. floats and cold water sinks, causing microcirculation of water to obtain the required hot water.
First of all, if there is water leakage from the electric heating rod, do not use the auxiliary electric heating function to avoid the risk of electric shock due to leakage during use.
It can be seen from the picture above that the water heater has been used for a long time and is badly corroded. If the solar energy is normal (the temperature increase of the tube heater to vide is not much different from when you first purchased it), you can continue to use solar heating if the solar heating speed is significantly slower than before and take corrosion into account. of the water tank and the bracket, if the corrosion is significant, it is recommended to replace the solar energy water heater.
If there are no major problems elsewhere, disassemble and inspect. First, determine the water temperature in the solar panel, make sure it is not high (to avoid burns during disassembly) and drain all the water from the solar panel. Remove the electric heating tube to replace it. Normally, there are two ways to fix the electric heating tube, one is fixed by sealing ring, without screws to specify the heating tube, the other is fixed by screws, you can pull; it came out forcefully with screws opened by screws. Check the sealing ring. Duewater leak, the sealing ring must be broken. Remove the sealing ring and buy a new one. At the same time check whether the electric heating rod is scaled. If the scaling is significant, it is recommended to clean or replace it. If the electric heating rod is heavily scaled, the scale in the vacuum tube must also be large. Find a professional solar installer to clean it depending on the situation.
In order to reduce the risk, if the electric heater is not used frequently, the electric heater can be removed. Use a plug to seal the hole of the electric heater.