Frost Protection Mode - Herz firestar 15 Operating Instructions Manual

DAYTIME AVERAGE MUST TEMPERATURE:
The daytime average target temperature already mentioned works as an average value
generator. This means that from when it is fist switched on, an average temperature
generator for the external temperature begins. This runs continuously in the background.
Should the daytime average target temperature be exceeded, this is an indication for the
control that it should be changed to the automatic summer mode. Here all heating
circuits are deactivated and thus no heat demand can be made. This means that the
higher the value set for the daytime average target temperature, consequently the later
the switch over to summer mode. The actual daytime average value shows where the
current average value of the external temperature is.

FROST PROTECTION MODE:

This mode is automatically activated when fixed values defined in the programme are not
reached. This should prevent freezing of the unit in the customer's absence. If the unit goes into
frost protection, then the return flow bypass pump is switched on.
Betriebsanleitung firestar 15-40 English V2.8 Page 37 of 71