Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 17

Heating system types for condensing boilers
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
Available system accessories
Vitotrol remote control
Coding Change required
system type
00: 1 If no system circuit A1 is connected, set
coding "00: 3", "00: 4", "00: 7" or "00: 8"
(see page 114)
02: 1 Set coding "02: 2" for operation with
modulating burner
0d: 1 Set coding "0d: 0"
The Vitocrossal 200 is operated with
modulating boiler water temperature
by means of the outdoor re-set boiler
control unit. Viessmann modulating
burner is operated through Vitotronic
control.
The boiler water temperature which
is established in the heating mode is
higher than the maximum heating
circuit supply temperature by an
adjustable difference.
Heating system types
(continued)
Automatic change
The system type is recognized automatically
when the sensors are connected
––
––
17