Technical data

30
Heating system designs
System version 9 (continued)
Possible applications
Vitocrossal 200 is operated via a
Viessmann boiler control unit with
outdoor reset function, modulating
boiler water temperature, and
load-dependent sequential
control – two-stage or modulating
burners are controlled.
Due to the LON-BUS communication
between controls, a boiler supply
temperature is automatically set.
This temperature is based on the
highest required mixing valve circuit
temperature plus adjustable differential.
The connection diagram is only a
recommendation and needs to be
verified for completeness and
functionality at the installation site.
Single-phase and three-phase pumps
must be connected with field supplied
motor contactors and/or motor
starters.
5351 340 v1.4
IMPORTANT