Emergency stop

At this input, you can connect a minimum thermostat or a differential pressure switch for freeze protection. This input provides an emergency stop in case of low temperatures.
If the minimum or freeze protection thermostat detects low temperature and opens its normally closed input, all stages will switch off immediately ignoring the blocking-off times, as defined with the parameter STx-02.

After the minimum temperature or freeze protection alarm returns to normal again, the control loop starts as a P controller. After a delay equal to the I-time, the integral part will be activated.