Solution to local radiator failure of electric heating furnace
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The valve disc has fallen off the valve seat, blocking the heat transfer flow path. The following are the main reasons why a radiator may not heat locally:
1. Valve failure. In this case, open the valve gland and repair it, or replace the faulty valve.
2. Excessive air in the air collecting tank can block the pipeline, which can also cause a radiator to not heat locally. In this case, open the air bleed accessories in the system, such as the air collecting tank exhaust valve or the manual air bleed damper on the radiator. This fault indicates a pipeline blockage. When the water supply time is short, feel the temperature at the pipeline bend and in front of the valve by hand, and tap and listen for the sound. When the water supply time is long and the system is large, dead water sections may appear before and after the blockage. It is difficult to locate the blockage by feel. In this case, drain the water. The drain point can be in the middle of the cold section of the pipe, moving toward both ends. If hot water continues to flow forward at the incoming water end during draining, the blockage is beyond that point. Then drain the middle section of the remaining pipe. If hot water does not continue to flow forward at the incoming water end, the blockage is between the first and second drain points. Once the blockage is located, open the pipe section and remove any debris or replace the section.
3. Pipe bulges may indicate improper installation of the electric heating system pipe slope. This creates air locks, blocking or reducing the flow area of the pipe section, causing localized heat loss. Adjust the pipe slope to meet the design requirements. Alternatively, the indoor system's supply and return pipes may be connected inversely to the outdoor heating network's supply and return pipes, preventing the indoor system from forming a complete circulation loop. In this case, carefully investigate the external network and correct the incorrectly connected pipes.
