Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 77

External hook−up in multi−boiler systems without LON
Low temperature boiler operation with a modulating burner
Connection modulating burner:
H Burner stage 1 fA of Vitotronic 100
H Plug−in connector lÖ from
Vitotronic 100 via the modulation
controller (on site) to burner
plug−in connector lÖ.
H Adjust the minimum temperatures
at the higher control unit with the
modulation controller 5 K higher
than the lower boiler water
temperature.
The DHW cylinder temperature and
the load−dependent cascade control
must be controlled by an external
control unit.
!
Please note
The contact "Boiler enable"
must be provided in
multi−boiler systems to prevent
boiler damage. This contact
must always be closed on the
lead boiler.
Installation
(cont.)
77