Extension Ea1 - Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual

Function description
External extensions (accessories)

Extension EA1

A1 PCB
F1 Fuse/MCB
DE1 Digital input 1
DE2 Digital input 2
DE3 Digital input 3
0 – 10 V 0 – 10 V input
fÖ Power supply
156
(cont.)
fÖ A Power supply for additional
accessories
aBJ Central fault message/feed
pump/DHW circulation pump
(potential-free)
aVG KM BUS