External e xtension H2
The external extension is connected
to the boiler control unit via the KM
BUS. The follo wing functions can b e
controlled or processed via this exten-
sion:
sK DHW circulation pump
fÖ Power supply
aVD
&
External bloc king
(termina ls 2 - 3)
&
External demand
(termina ls 1 - 2)
&
External operating m ode chan-
geover (terminals 1 - 2)
aVG KM BUS
The allocation of function External
changeover of operating mode is
selected via c oding addres s 91.
Extensions for external connections (accessory) (cont.)
102
Function description
5692 548 GB
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