Viessmann EA1 - Power Supply

13
If EA1 extension is connected to the
heating circuit control unit, the feed
pump is started directly.
DHW circulation pump
Brief operation: The DHW circulation
pump starts when there is a demand
from the digital input D1 to D3 selected
for this function.
Set the runtime:
■ Group A: Coding address 3d
■ Group B: Coding address 12
■ Group D: Parameter 47 (General
group)
Operation according to time program:
The DHW circulation pump starts at the
selected switching times.
Information on DHW circulation
pumps
Connect DHW circulation pumps with
standalone functions directly to the
230 V ∼ supply.
Fault message facility
If a digital input is used as fault mes-
sage input, the connected fault mes-
sage facility is switched on when a fault
occurs.
Installation and service instruc-
tions
If the relay of output
aBJ
is switched,
contact P-Ö is opened.
Contact P-Ö closes if a fault occurs at
EA1 extension or the communication is
interrupted.
Note
If a fault message facility is connected,
this will be activated briefly when the
system starts.
Connecting a circulation pump or a fault…
(cont.)
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