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Viessmann B2HB 45 Installation Instructions Manual page 55

B2hb series vitodens 200-w wall-mounted, gas-fired condensing boiler
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Vitodens 200-W B2HB 45, 57 Installation
Closing the External Accessory Connection Box
(continued)
8. Tighten the external accessory connection box
retaining screw.
9. Install the external accessory connection box cover
screws.
Control Connections
55

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B2hb 57

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