Control Settings, External Heat Source External Heat Source - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Control settings, external heat source
External heat source
Parameter
7B00
Details of an external heat source
(ext. HS) integrated into the heating
system.
Note
All following parameters will only
become visible after an external heat
source has been confirmed with
"YES".
Priority
Parameter
7B01
Define whether priority is given to
heating by the external heat source or
heating by the electric booster heater
(instantaneous heating water heater).
Dual-mode temperature
Parameter
7B02
Temperature limit for additional opera-
tion of the external heat source.
The long-term average outside tem-
perature must be lower than this tem-
perature limit for the external heat
source to be enabled.
This starting limit is ineffective if the
heat pump has developed a fault.
144
Access
"Device settings"
"Programming"
"Ext. heat source"
y to "Ext. heat source"
"YES" or "NO"
Standard setting
Setting range
Access
"Device settings"
"Programming"
"Ext. heat source"
y to "Priority"
"YES" or "NO"
Standard setting
Setting range
Access
"Device settings"
"Programming"
"Ext. heat source"
y to "Dual-mode temp"
1 or !
Standard setting
Setting range
No
Yes/No
Yes
Yes/No
10 °C
-50 to 50 °C