How to Maintain and Service a Gas Wall-Hung Boiler

Release Date:

2022/05/20 14:44

Nowadays, many households install gas wall-mounted boilers in their bathrooms because they allow for personalized temperature control. However, when it comes to the gas wall-mounted boilers we use on a regular basis, do we really know how to maintain them? Let’s take a look at the proper maintenance procedures. As scale buildup on the inner walls of the heat exchanger continues to thicken, the diameter of the heat-exchanger tubes becomes progressively smaller, and the water flow becomes increasingly obstructed. This not only places a heavier load on the circulation pump but also reduces the boiler’s heat-exchange efficiency. The main symptoms include increased fuel consumption, inadequate heating, reduced supply of both hot and cold domestic hot water, and lower hot-water output. If the heat-exchange components of the gas wall-mounted boiler are allowed to operate under such high-load conditions for an extended period, the damage to the boiler can be severe—especially to plate-type heat exchangers—and users should pay particular attention when selecting a boiler brand. Most of the heaters we use are made of cast iron. During installation, residual sand mold material and other impurities in the radiators cannot be completely removed; moreover, the water in the heating system is constantly circulating, and since the heating section of the gas wall-mounted boiler lacks a filter, corrosive residues from the radiators and pipes, as well as impurities inherent in the water itself, enter the heating circuit and are recirculated by the boiler’s circulation pump. Under high temperatures, these impurities continue to break down, some of which form scale that adheres to the inner walls of the boiler, further narrowing the tube diameter. Consequently, the pressure on the circulation pump increases, and prolonged operation can lead to a reduction or even complete blockage of the pump’s speed, seriously compromising its service life. For heating systems, given that radiators tend to accumulate substantial amounts of impurities during initial use, it is recommended to drain the dirty water after about one year of operation, refill the system with fresh water, and repeat this process every few years. Since each water change introduces a significant amount of alkalinity, the alkalinity level in the system must be kept within a certain range; therefore, frequent water changes are not advisable. After the heating season ends, all that is required is to clean and maintain the gas wall-mounted boiler separately. The above outlines the key maintenance tasks for gas wall-mounted boilers, and we hope this information proves helpful.

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