Vitodens 200-W B2HB 45, 57 Installation
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Control Connections
Accessing the X3 Plug
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.
Connecting the Low-loss Header Sensor