Overview Of External Functions - Viessmann Vitotronic 11 CC1E Installation And Service Instructions Manual

External functions
—

Overview of external functions

Connections on the low voltage PCB
Function
External changeover, stepped / modulating burner
External demand
Connections at EA1 extension
Function
External demand
External blocking
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
A
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).
38
single boiler system
.1/ .2
aVH
A
2 3
146
Floating contact
Plug/contact Page
.1/ .2 38
aVH aVH
aVD .1/ aVD .2 41
or
.2/ .3
aVD aVD
or
aVH .2/ aVH .3
Plug/contact Page
DE1, DE2 or DE3 40
or
0 to 10 V input
DE1, DE2 or DE3 39