Operating instructions

71
Installation
External hook−up in single boiler systems (cont.)
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.
Zero volt contacts of the higher control unit
with modulation controller:
Burner stage 1 (base load) ON
Modulation controller:
Reduce burner output
Increase burner output
A Vitotronic100
B Burner control
5862730GB
A
143 146
B