How to buy solar water heaters

Environmental protection is the mainstream of the times and we have been emphasizing it. In the past, we used more gas stoves, followed by gas water heaters. These ways of boiling hot water produce harmful gases, which is not conducive to environmental protection. Due to the large population, the pollution brought about cannot be ignored. The emergence of solar water heaters has changed this situation.

How to buy a solar water heater

1. See brand and after-sales service. The solar water heater main engine is outdoors, and it is subjected to wind and rain all the year round, so it needs to be repaired and maintained by professionals. It is necessary to choose a professional manufacturer's product, preferably a quality brand, so that it is possible to have excellent product quality and excellent after-sales service system and commitment.

2. Look at the quality of the vacuum tube. The vacuum tube is a key component of the water heater. The amount of heat obtained by the vacuum tube under the same external conditions directly affects the temperature of the water. When purchasing, carefully observe the coating on the glass tube in the vacuum tube. The color is generally black, dark blue or dark gray. The coating with good quality is uniform in color, and the film has no scratches, no peeling or peeling. There are also no stones, and the support members are placed in a positive position and are not loose.

3. Look at the material selection and process technology of the insulation layer and the liner. There is a layer of thermal insulation material between the outer shell and the inner tank of the solar water heater tank, which plays a very important role in the hot water insulation. The service life of the polyurethane insulation material can reach more than 15 years. The liner is the place to store hot water. It is best to use a stainless steel plate with a thickness of about 0.5 mm. In short, consumers should choose to import polyurethane and thicker water tanks. Because the insulation layer and the inner tank of the water heater are inside, consumers are not easy to see, so the purchasing market has a good reputation, and the products with guaranteed quality, performance and service will be better.

4. Look at the thermal performance indicators. Not the higher the water temperature in the tank, the better the thermal performance, but the higher the average daily efficiency, the lower the average heat loss coefficient. The second is to see if the pressure test of the water heater is qualified. If the pressure test fails to meet the standard, it will easily lead to leakage of the water heater, which wastes hot water and cannot be used.

5. Look at the bracket design. The bracket should have sufficient strength and rigidity. The brands are different and the styles are different. According to the top of the building, the roof is flat or ridged. The brackets are divided into flat top and roof. The role of the bracket is to carry the water storage tank and fix the heat collector. Therefore, the requirement for the bracket is only the pressure bearing capacity requirement. Generally, the thickness of the bracket steel is about 2 mm, and the thicker the steel, the stronger the supporting ability.

6. Look at the reflector design. When purchasing, you should pay attention to whether the reflector design of the product can make full use of the heat absorption surface of the vacuum tube, and whether the vacuum tube can receive the light to the greatest extent. In addition to the "six look", pay attention to the other two points. First of all, don't buy products that are too cheap, for the psychology of many farmers who like low-priced products, some family hand-made workshops in the industry, the products have not been tested by the national solar water heater authority testing institutions, these products with hidden dangers are usually very low The price is sold to farmers and does not provide perfect after-sales service. Therefore, when purchasing solar water heaters, if the price is far lower than that of other manufacturers in the industry, the quality is not guaranteed. Secondly, don't be misled by various conceptual hype. Another thing to pay attention to when purchasing solar water heaters is not to be misled by various conceptual hype. The current solar energy industry is full of many concept hype, and various new concepts emerge in an endless stream, such as “a certain wall” concentrated on the heat preservation and heat collection level, and “the certain tube” concentrated in the vacuum tube field. Most of the marketing methods do not have real innovative technology, but only through a new concept or change the shape of the product materials to achieve the purpose of attracting consumers.

Solar water heater installation tips

Step 1. Prepare for work. Prepare all the tools needed for the installation and construction of the solar water heater, then open the water heater package and check whether the accessories are complete according to the packing list;

Step 2, install the bracket. Under normal circumstances, the solar water heater is installed on the roof, facing north to the south, 5°-10° west to the west, ensuring that there is no sunlight blocking, so as to accept the longest sunshine, and then mark the assembled bracket. The beveled frame is aligned with the determined orientation and fixed as long as there is no looseness.

Step three, fix the bracket. The installation step of the solar water heater in this step is mainly to use cement piers, expansion bolts or wire ropes to fix the installed brackets. Choose the appropriate fixing bracket method according to the actual situation of the installed roof.

Step 4: Install the water tank. First of all, you need to install electric heating, use a screwdriver to open the bottom plug, the building material has a built-in sealing rubber ring, look at whether it is in place, put the built-in electric heating rod into, close, and then tighten the bolt; secondly, put the water tank in the bucket of the bracket Support and use bolts to ensure that the height of the tank is 1-2 meters higher than the height of the household.

Step 5. Install the vacuum tube. Firstly, the vacuum tube holder should be installed at the specified position of the bracket. Secondly, after the sealed silicone ring sleeved on the inner tank of the insulation layer tank is installed, the non-destructive vacuum tube outer sealing rubber ring is placed into the vacuum tube 15 cm, fully filled with soapy water. Soak the nozzle, and then check all the vacuum tubes in order to check for water leaks.

Step 6. Connect the hot and cold water pipes. First use raw tape to wrap the water outlet, then put the pipe fittings, connect the solar water heater to install the special pipe; fasten the electric heating cable to the outer wall of the pipe, and tie it with the adhesive tie; install the sensor on the water level hole of the water tank, then loose Open the locking device, insert the metal sensor, insert it into the bottom of the water tank, lock it and fix it to prevent moving and falling off; nextly, connect the water pipe to the water tank installed in the solar water heater; finally, connect the indoor water pipe.

Step seven, connect the wires. First, connect the wires of the electric heating device. The red color is the fire wire, the two colors are the ground wire, and the remaining one is the neutral wire. After the electric heating wire is connected, the heating cable is connected.

Step 8. Install the full intelligent controller. The all-intelligent controller has the functions of automatic water supply, regular water supply, constant temperature water supply, water shortage protection and timed heating. The all-intelligent controller is usually installed on the indoor side wall.

Step 9. Debugging and running. After the installation is completed, power on, trial run, confirm that there is no problem, after the installation is completed, clean the site.

For more information on how to buy solar water heaters and solar water heater installation skills, we will introduce so much for everyone. I don't know how much everyone knows about solar water heaters. I hope that we can help you with the knowledge of how to buy solar water heaters and solar water heater installation skills.