Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 210

Parameter group heating circuits/cooling circuit
200E Maximum set flow temperature
The set flow temperature, which is cal-
culated from the outside temperature
and the heating curve, is limited by this
parameter to a maximum set flow tem-
perature. For the heating circuit without
mixer (A1), limited modulation properties
mean the heat pump regulates to the
return temperature. The set return tem-
perature is calculated from the set flow
temperature minus 5 K.
Note
Since the control unit only limits the set
value with this parameter, always install
an on-site temperature limiter in the flow
of an underfloor heating circuit, to restrict
the maximum temperature.
Delivered
400 (≙ 40 °C)
condition
Setting 100 to 700
range
(≙ 10 to 70 °C)
210
(cont.)