What happens if the solar water heater does not produce hot water when it is left on?

There are three possible situations for this phenomenon:

1. On a rainy day without the sun

We should know that if there is no sun outside, on a rainy day, Normal solar water tanks have no hot water available.

At this time, whether it is a single-chamber solar water heater or a three-chamber solar water heater, as long as the water tank has built-in electric heating and the meter also has an electric auxiliary heating function setting, you can choose to heat it and you will have hot water. use.

PS: It should be noted that the heating time of a single-chamber solar water heater often takes 1-2 hours, or even longer, so the heating time needs to be arranged in advance, otherwise it will affect the use; in addition, the automatic heating mode can also be set , but the power consumption is relatively large;

Three warehouses of solar energy are divided into three independent warehouses, and the heating is only the third warehouse, which is equivalent to an electric water heater, so the heating time will not be long and wasteful. .

2. When there is sunshine but insufficient exposure in winter

First: If there is sunshine in winter but insufficient exposure, the normal water temperature of the solar water tank should be around 30-40 degrees (After excluding the addition of cold water), in this case, if the meter displays no temperature, check whether the temperature probe failure causes a display error; if there is actually no temperature, it is a heat absorption problem in the vacuum tube or it is blocked!

Second: It may be that the solenoid valve is faulty and cannot be closed. Cold water is being replenished all the time, causing the water temperature to fail to rise;

Third: The slight problem may be caused by water leakage in the pipes!

3. Sufficient sunlight

Front: If the solar water heater does not produce hot water, first check whether the temperature displayed on the meter is normal (normal here refers to the display when the sun is bright) It is 50-80 degrees). If it is normal and hot water does not come out, but cold water comes out, it proves that there is no problem with the temperature probe. It may be caused by a damaged water mixing valve or water leakage in the pipeline;

Second: If the mixing valve turns on the hot water valve and the cold water does not come out, then check whether the water tank is empty, the water outlet is blocked, etc.;

Third: If the temperature display on the instrument is abnormal, The temperature probe may also have problems;

Fourth: In addition, it may be that the vacuum tube itself does not absorb heat or the water tank is not insulated;

Fifth: If the water tank is empty, check the instrument And whether the solenoid valve is faulty, causing no water supply, and thus no hot water.

Extended information:

Solar water heater is a heating device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's hot water needs in life and production. use.

Solar water heaters are divided into vacuum tube solar water heaters and flat-plate solar water heaters according to their structural forms. Vacuum tube solar water heaters are the main ones, accounting for 95% of the domestic market share.

Vacuum tube household solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. Converting solar energy into heat energy mainly relies on vacuum heat collecting tubes. Vacuum tube heat collecting tubes use the principle that hot water floats up and cold water sinks. , causing water to produce microcirculation to obtain the required hot water.

Reference: Solar water heater-Baidu Encyclopedia