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When the water level due to the evaporation process reaches level “B”, the level unit sends a signal
to the control system, which opens the double inlet valve and the water tank is filled up. On reach-
ing level “A”, the level unit again sends a signal to the control system and the double inlet valve is
closed.
If the water level goes below level “C”, the combustion will be interrupted until the water level reaches
“C” again.
To ensure safe operation, the control system constantly monitors the proper function of the level unit
in regular intervals.
Steam generation/control
The steam is generated in the water tank via the heat exchanger/s. The steam production is regulated
continuously by the internal PID controller or an external continuous controller.
Flushing
The concentration of minerals in the water in the tank increases due to the evaporation process. In
order that this concentration does not exceed a specified value, an appropriate quantity of water is
pumped off from the tank at a fixed time interval and replaced by fresh water. These flushing cycles
are based on steam production to increase the efficiency of the humidifier.
When a flushing cycle is initiated the drain pump is activated and the inlet valve opens. In the mixing
pipe below the filling chamber the hot drain water is mixed with the cold cooling water and leaves
the unit with a temperature approx. around 60 - 70 °C.
If the lowest operating level is reached in the tank during the flushing process, the inlet valve remains
open until the water level in the tank has again reached the normal operating level.
Summary of Contents for GS 40 Series
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