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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Connections
(continued)
Accessing the control unit connections
1. Remove both screws from the external accessory
connection box front plate and set aside.
2. Remove both retaining screws as shown and set
aside.
3. Pull the external accessory connection box forward.
4. Swing the external accessory connection box down.
Boiler Connections
17
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