Viessmann B2TF Installation And Service Instructions Manual page 71

Subscriber numbers of connected extensions
Fig. 49
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
Function
System with solar collectors
Heating circuit 2 with mixer
Heating circuit 3 with mixer
Heating circuit 1 without mixer (circulation
pump downstream of low loss header)
Function extensions (e.g.):
Fault message input
■
Fault message output
■
Operating mode changeover
■
System configuration (parameters)
(cont.)
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.
Electronics mod- Extension
ule
ADIO EM-S1
ADIO EM-M1/EM-MX
ADIO EM-M1/EM-MX
ADIO EM-P1
DIO EM-EA1
DIO EM-EA1
DIO EM-EA1
Setting
Rotary switch S1
0
1
2
3
1
2
3
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