Control Settings, External Heat Source; External Heat Source; Priority, External Heat Source; Temperature Limit For Operation - Viessmann VITOCAL 300 Installation And Service Instructions Manual

Control settings, external heat source

External heat source

Should an external heat source be a
part of the system, either set it by
selecting option "Yes", or via the sys-
tem configuration (see page 45).
Access
& "System settings"
& "Program"

Priority, external heat source

This setting defines whether priority is
given to heating by the external heat
source or heating by the electric hea-
ter.
Access
& "System settings"
& "Program"

Temperature limit for operation

Setting of the temperature limit for the
additional operation of the external
heat source. The long-term average
outside temperature must be lower
than this temperature limit for the
external heat source to be enabled.
This start restriction does not apply if
the heat pump is faulty.
122
& "Ext. heat source"
& "Ext. heat source" ("YES"/"NO")
Standard setting
Setting range
& "Ext. heat source"
& "Priority ext. HS" ("YES"/"NO")
Standard setting
Setting range
Access
& "System settings"
&
"Program"
& "Ext. heat source"
& "T limit for operation" (1/!)
Standard setting
Setting range
NO
YES/NO
YES
YES/NO
10 °C
-50 to +50 °C