How to replace solar energy and medium in Four Seasons Muge

You can first open a lid for adding liquid in the water tank of solar water heater, and then unscrew the lid, and you will see a container for adding medium. You need to find a hose, then take a pointed pot and put the culture medium in it, but remember not to fill it too full. Usually it is added to the indoor water tank, and there will be a medium filler in the water tank. The specific method of adding culture medium is as follows: 1. Generally, we will choose antifreeze that will not freeze at -20℃ north of the Yangtze River. In the south of the Yangtze River, antifreeze that will not freeze at-10℃ should be selected, and pure water should also be used as heat transfer medium in Yunnan and other places. 2. Generally, we will choose the antifreeze that will not freeze at -30℃ north of the Yellow River, and we must ensure that the system will not freeze in winter, so the antifreeze in the north is ethylene glycol (propylene glycol or glycerol). According to different latitudes, heat transfer media with different freezing points are selected so that they can be used normally. 3. Whether the added medium is prevention and control or water, the adding method is actually quite simple. The corresponding medium can be directly introduced into the liquid filling port of the indoor water tank. It is enough to add water in the south, because it won't freeze in winter.