Viessmann B2HF, Installation And Service Instructions For Contractors

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All extensions connected to the heat generator (except
the SDIO/SM1A electronics module) must have a sub-
scriber number. The subscriber number is set on rotary
switch S1 at each extension.
Fig. 48
Rotary switch S1 settings:
■ EM-S1 extension (system with solar collectors): 0
■ EM-EA1 extension (max. 3 extensions in one sys-
tem)
Consecutive no. (any sequence):
1 up to 3
■ EM-P1 extension
– If no heating circuits with mixer are available in the
system:
1
– If heating circuits with mixer (EM-M1 or EM-MX
extensions) are present in the system: Always set
subscriber number for EM-P1 extension to the con-
secutive number after EM-M1 or EM-MX exten-
sions.
■ EM-M1 or EM-MX extensions
– Heating circuit 2 with mixer: Rotary switch on
extension kit to 1
– Heating circuit 3 with mixer: Rotary switch on
extension kit to 2
Note
EM-EA1 extensions may have the same subscriber
number as the EM-P1, EM-M1 or EM-MX extensions.
The following table shows an
example of how a sys-
tem may be equipped.
Function Electronics mod-
ule Extension Setting
Rotary switch S1
System with solar collectors ADIO EM-S1 0
Heating circuit 2 with mixer ADIO EM-M1/EM-MX 1
Heating circuit 3 with mixer ADIO EM-M1/EM-MX 2
Heating circuit 1 without mixer (circulation
pump downstream of low loss header) ADIO EM-P1 3
Function extensions (e.g.):
■
Fault message input
■
Fault message output
■
Operating mode changeover
DIO EM-EA1 1
DIO EM-EA1 2
DIO EM-EA1 3
System configuration (parameters)
Subscriber numbers of connected extensions
5593201
Parameter