Parameter Group External Heat Source; B00 Enable External Heat Source; B01 Priority Ext. Heat Source/Instant. Heating Water Heater; B02 Dual Mode Temperature External Heat Source - Viessmann VITOTRONIC 200 Service Instructions Manual

Parameter group external heat source

Parameter group external heat source
Service menu:
1. Press OK + å simultaneously for
approx. 4 s.
2. "Coding level 1"

7B00 Enable external heat source !

If there is a corresponding heat demand,
the external heat source can be started
by the heat pump control unit.
Note
All other parameters for the external heat
source are visible only if this parameter
is set to "1".

7B01 Priority ext. heat source/instant. heating water heater !

Value Explanation
"0" External heat source has prior-
ity.
"1" Instantaneous heating water
heater has priority.

7B02 Dual mode temperature external heat source !

If the long term average of the outside
temperature lies below the set "Dual
mode temperature external heat
source" for a long time, 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.
114
3. "External heat source"
4. Select parameter.
Value Explanation
"0" External heat source is not
used.
"1" External heat source, e.g. oil
condensing boiler is enabled.
Delivered condi-
tion
0
Delivered condi-
tion
1
Above the dual mode temperature, the
heat pump control unit only starts the
external heat source under the following
conditions:
■ DHW reheating with the external heat
source is required ("Enable external
heat source for DHW heating
7B0D").
■ Heat pump is faulty.
Setting range
0 / 1
Setting range
0 / 1