Viessmann B2TB004 - Closing the External Accessory Connection Box

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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Closing the External Accessory Connection Box
4. Tilt the top of the external accessory connection
box cover forward.
5. Drop down over the locating pins and set the cover
in place.
6. Swing the external accessory connection box up.
7. Push the external accessory connection box in until
the holding screw is in place.
Control Connections