Viessmann Vitodens 200-W B2HA 112 Installation Instructions Manual page 49

Vitodens 200-W B2HA 112, 150, 399, 530 Installation
Overview of Electrical Connections, Models B2HA 112, 150, 399 and 530
WARNING
DISCONNECT POWER BEFORE
SERVICING BOILER.
If any of the original wires as
supplied with the appliance must
be replaced, it must be replaced
with the exact equivalent.
CAUTION
Label all wires prior to disconnection
when servicing controls. Wiring errors
can cause improper and dangerous
operation. Verify proper operation
after servicing.
Only one function/accessory may
*
be assigned to each connection.
Control Connections
47