Operating instructions
77
Installation
External hook−up in multi−boiler systems without LON (cont.)
Low temperature boiler operation with a modulating burner
Connection modulating burner:
H Burner stage1fA of Vitotronic100
H Plug−in connectorlÖ from
Vitotronic100 via the modulation
controller (on site) to burner
plug−in connectorlÖ.
H Adjust the minimum temperatures
at the higher control unit with the
modulation controller 5K 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.
5862730GB