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EA1 Extension Module Installation
The following components can be connected to plug aBJ:
H Pump speed reduction function
or
H DHW re-circulation pump
or
H Fault message facility
Rated voltage (max): 120V
Rated current (max): 2 A~
Connecting a Circulation Pump or a Fault Message Facility
Function assignment
Select the function of output aBJ:
H Vitotronic, type H ...: Code 36
H Vitotronic, type G ...: Code 5C
If a digital input is used as fault message input, the
connected fault message facility is switched on when
a fault occurs.
If the relay of output aBJ is switched, contact P-Ö
is open.
If a fault occurs at extension EA1 or communication
is interrupted, contact P-Ö is closed.
Note: If a fault message facility is connected, this will
be activated briefly when the system starts.
Legend
A Circulation pump or fault message facility
Refer to the boiler Service Instructions
Connections
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