Accessing The X3 Plug; Connecting The Low-Loss Header Sensor - Viessmann B2HB 45 Installation Instructions Manual

Control Connections

Accessing the X3 Plug

Connecting the Low-loss Header Sensor

48
Vitodens 200-W B2HB 45, 57 Installation
1. Remove the control unit cover (see page 15).
2. Remove the X3 plug from the control board. Install
the required sensors as per installation instructions.
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.