43
Connections on the low voltage PCB
Function
Plug/contact
Page
External changeover, stepped / modulating burner
aVH
.1/
aVH
.2
External demand
aVD
.1/
aVD
.2
or
aVD
.2/
aVD
.3
or
aVH
.2/
aVH
.3
Connections at EA1 extension
Function
Plug/contact
Page
■
External demand
0 to 10 V input
External changeover of multi stage/modulating burner
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connection
must be potential-
free
.
Function
External changeover, stepped / modulating burner
Connection
aVH
.1/
aVH
.2
146
A
2 3
1
A
Floating contact
Contact
■
Closed
Two-stage operation
■
Open
Modulating operation
Parameter
Set parameter "02:2" in the
"Boiler"
group.
Note
When calling up the burner version, the address for modulating appears even after an ex-
ternal changeover (it is not rewritten).
External functions
—
multi boiler system
Overview of external functions
5863679
Installation
Содержание Vitotronic 11 CC1E
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