B02 Dual-Mode Temperature Of External Heat Sources; B0D External Heat Source For Dhw - Viessmann VITOCAL 300-G Installation And Service Instructions Manual

Parameter group external heat source

7B02 Dual-mode temperature of external heat sources

"Dual-mode temperature 7B02"
Outside temperature limit for operating
the external heat source.
If the average outside temperature is
lower than the set limit temperature over
a longer period ("Dual-mode tempera-
ture"), the external heat source is
switched on.
Requirement: The heat pump and/or
other heat sources cannot meet the cur-
rent heat demand on their own.

7B0D External heat source for DHW

"External heat source for DHW 7B0D"
Using the external heat source for DHW
heating.
If the heat demand of the DHW cylinder
cannot be covered by the heat pump, the
circulation pump for DHW reheating and
the external heat source will be activa-
ted.
Valu Explanation
e
"0" External heat source is blocked
for DHW heating.
"1" External heat source is enabled
for DHW heating.
Delivered condition
Setting
188
0
0 / 1
Above the dual-mode temperature, the
heat pump control unit only starts the
external heat source if, for example, a
heat pump fault is present.
Delivered
100 (≙ 10 °C)
condition
Setting –500 to +500
(≙ –50 to +50 °C)