Bpt TH 450 - Frost Protection Function

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12.3- Press the button once to go back to the
heating programme (fig. 43) or twice to go back to
the cooling programme (fig. 44).
12.4- Close the cover.
TH450
13  FROST PROTECTION FUNCTION
Even if proportional-integral operating mode has
been selected, in frost protection mode the tempera-
ture set for heating mode will be maintained but with
differential control only.
13.1- Open the cover.
13.2- Press the button twice and check for
activation of the symbol (fig. 45).
13.3- Press button .
TH450
Fig. 43 Fig. 44