You must remember the function of the valve when installing it. Others can only guess based on the principle:
The lowest white pipe in the lower right corner must be the overflow pipe of the solar water heater. . The two valves above. One of them must be the water fill valve and the other is unclear. This could be the main valve or the water valve that allows hot water to enter the shower head.
You can try this:
Open two valves at the same time to add water using solar power. When the lower pipe overflows, it means it is full. At this time, close one of the upper valves and wait two or three minutes. If the overflow gets smaller and smaller and finally stops, then it's the water injection valve; if the overflow does not change, close another valve, then the overflow will definitely become smaller and stop finally, that is, the water injection valve.
If both valves are open, it is impossible to fill up with water.
How to use solar energy to release water? If you figure out which one is the water fill valve, the other should be the hot water valve. Open it when using water. Of course, the water fill valve must be closed after filling with water.
One of the two solar water valves is for cold water inlet and the other for hot water outlet. If you don't know which two are, you can simply turn both off and then turn on the hot water. Water tap on hot water side, then try both solar water valves. Open them separately to see which of the hot water taps starts flowing. This water valve is for hot water and the other is for pipes. Cold water.
If both water valves are opened separately and no water is flowing from the tapt that releases hot water, check if there is a water valve in front of the hot water faucet. If so, open it. it's always like this, there may be no water in solar energy. You can open two solar water valves at the same time, water should come out from the tap which releases hot water. If there is no water coming out of the faucet and releasing hot water, this water valve is connected to hot water.
After distinguishing the cold water inlet and heat outlet functions of the two solar water valves, after each water use, open the cold water inlet valve to power solar energy. When the water is full, the water overflows. solar energy. After closing the cold water inlet valve (not available if automatic water supply equipment is installed, only 20 minutes is enough), the hot water valve can be opened at any time, or it can be opened before each usetion. water, then turn on the hot water tap.