34 D24030 | Date 11/2018
Operation and control
Electronic temperature monitoring ( TWW)
The manually set monitoring temperature min and max of the overtemperature control is
monitored by an adjustable over/undertemperature controller (TWW) protection class 3.3 acc.
to DIN 12 880. If the manually set monitoring temperature
max is exceeded, the TWW takes
over temperature control and begins to regulate the monitoring temperature (Fig. 20).
t
°C
Setting MAX
Set temperature
Controller error
Emergency operation
Fig. 20 Schematic diagram of how TWW temperature monitoring works
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