Boiler External Demand Via External Ea1 Extension - Viessmann Vitotronic 11 CC1E Installation And Service Instructions Manual

External functions — single boiler system
Connecting the external control unit

Boiler external demand via external EA1 extension

!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connection must be potential-
free.
Function
Control unit
Connection 0 to 10 V input
Note
Ensure galvanic separation between the
earth conductor and the negative pole of
the on-site power source.
0 to 1 V No specification for set boiler wa-
1 V
10 V
Parameter
■
■
40
(cont.)
[{{] aBJ f-]
0-10V
A
+ - S P Ö L
N
U
+
ter temperature
Set value 10 °C
Set value 100 °C
Note parameter "46" in the "General"
group.
A temperature or output can be specified
via the 0 to 10 V input. Note parameter
"45" in the "General" group.
External demand
EA1 extension
DE1, DE2 or DE3
DE1
fÖ
N L
A A
Floating contact
A
EA1 extension
B
The burner in the boiler is switched on
■
subject to load.
The boiler water temperature is restricted
■
by the electronic maximum temperature
limiter or the mechanical temperature con-
troller.
Set "42" (DE1), "43" (DE2) or "44" (DE3)
■
in the "General" group to 2.
Select the set boiler water temperature in
■
parameter "0B" in the "General" group.
B
DE2 DE3
A