Control Connections
Accessing the X3 Plug
Connecting the Low-loss Header Sensor
50
Vitodens 200-W B2HA 112, 150, 399, 530 Installation
1. Remove the control unit cover (see page 24).
2. Remove the X3 plug from the control board. Install
the required sensors.
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.