Accessing The Control Unit Connections - Viessmann Vitodens 200-W B2HA 112 Installation Instructions Manual

Vitodens 200-W B2HA 112, 150, 399, 530 Installation
Connections
(continued)

Accessing the control unit connections

1. Remove both screws from the external accessory
connection box front plate and set aside.
2. Loosen both retaining screws as shown (do not
remove).
3. Pull the external accessory connection box forward
until the retaining screws are clear of the guides.
4. Swing the external accessory connection box down.
Boiler Connections
23