When leaving the factory, two parameters have been set in the control system: maximum power and minimum power.
In normal operation, the water heater approach system uses PID technology to automatically adjust the power of the water heater according to the inlet temperature, user-set temperature and actual outlet temperature, so as to achieve a constant outlet temperature.
In winter, because of the cold weather, the tap water temperature is relatively low, and the water heater works normally. Under the same water flow, the tap water temperature is relatively high when the weather gets hot in summer, and the control system of the water heater has been adjusted to the minimum power state to heat the water above the set temperature.
For example, when the water heater leaves the factory, the maximum power is 20KW and the minimum power is 8KW.
Winter: water flow 10L/min, tap water temperature (water heater inlet temperature) 15 degrees. When the power of the 42-degree water heater is adjusted to 19KW by the control system, its outlet temperature is about 42 degrees, which makes people feel good!
Summer: the water flow is also 10L/min. Tap water temperature (water heater inlet temperature) Because the control system of 42-degree water heater is set to 30 degrees in summer, the power is automatically adjusted to the minimum power of 8kw, but its outlet temperature is still around 50 degrees, which makes people feel very hot.
This means that the power required in summer is relatively small, but the minimum power of the water heater is greater than the power required in use. At this time, the above outlet water temperature will be too high to be adjusted.
If this problem occurs, it is suggested to increase the water flow rate or increase the hot and cold water mixing valve at the use terminal.