Viessmann Vitodens 200-W Series Installation Instructions Manual page 48

Control Connections
Electrical Connections
Accessing the X3 plug
3.
X3
2.
Fig. 41
Connecting the low-loss header sensor
7 6 5 4 4 3 2 1
X3
Fig. 42
48
(continued)
1.
1. Remove the control unit cover (see
page 21).
2. Remove the X3 plug from the control
board. Attach sensors and/or
KM-BUS and/or accessories and
reinsert the X3 plug. Refer to the
following sensor information.
1.
3. Reinstall the control cover.
1. Connect the low-loss header sensor
(if used) to terminals X3.4/X3.5 on
the boiler control board.