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Viessmann VITOCAL 250-A - Page 96

Viessmann VITOCAL 250-A
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96
2940.0 Start delay, external heat generator
The external heat generator does not start within the
specified period following a change of the set flow tem-
perature in the secondary circuit. This may occur
for example during a change in operating status in the
time program for room heating or following a change-
over between room heating and DHW heating.
2940.1 Min. runtime, external heat generator
Following a demand, the heat pump control unit will
not switch off the external heat generator within this
time.
2940.2 Stop delay, external heat generator
When the demand for the external heat generator is no
longer present, the external heat generator initially
remains on. The external heat generator is switched
off once the system flow temperature has reached the
set value for the duration set here.
3098 Temperature offset, external heat generator
3098.0 Max. flow temperature boost, external heat generator
Boost to flow temperature of external heat generators
compared to the required set flow temperature for the
system
A slightly higher flow temperature of the external heat
generator compensates for the following:
Possible minor mixer leaks
Heat losses in the low loss header
Heat losses in the hydraulic lines to the external heat
generator
Parameter group for external heat generator
2940 Delay, external heat generator
6218234
Parameter

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