Backflow technique in central air conditioning auxiliary heater
In order to prevent the air conditioning auxiliary heater due to external water prods dry, all electric water heater by backflow-technical.
Most factories use backflow technologies currently is the choice of the safety valve with non-return function to achieve. But the problem with this technique is when auxiliary heaters work, due to thermal expansion and contraction of the water in the tank, some water will leak through the valve core functions to the pipeline leaked, releasing water heater pipe can be easily localized vibration when resonance is making an abnormal sound.
While there are security risks are, relief valve internal leakage function often scale blockage and failure so that the working pressure of the tank, central air conditioning auxiliary heater uses the drop in life expectancy.