External Heat Source For Dhw - Viessmann Vitocal 300-G BW Installation And Service Instructions Manual

Dual-mode temperature
Access
■ "Device settings"
■ "Programming"
■ "Ext. heat source"
■ y to "Dual-mode temp"
■ 1 or !

External heat source for DHW

Parameter
■ 7B0D
Details as to whether an external heat
source is to be used for DHW heating.
In case of higher heating demand made
of the DHW cylinder that cannot be cov-
ered by the heat pump alone, the corre-
sponding pump (circulation pump for cyl-
inder reheating) and the external heat
source will be activated.
Access
■ "Device settings"
■ "Programming"
■ "Ext. heat source"
■ y to "Ext. HS for DHW"
■ "YES" or "NO"
Control settings, external heat source
(cont.)
Standard setting
Setting range
If the acknowledgement Yes is entered,
no electric immersion heater EHE instal-
led in the DHW cylinder can be control-
led.
Standard setting
Setting range
10 °C
-50 to 50 °C
No
Yes/No
145