40
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
External demand
Control unit
EA1 extension
Connection
0 to 10 V input
Note
Ensure galvanic separation between the
earth conductor and the negative pole of
the on-site power source.
DE1, DE2 or DE3
U
+
L N
L
N
fÖ
S P
aBJ
Ö
[{{]
0-10V
f-]
A
+ -
B
A
A
A
DE2
DE1
DE3
A
Floating contact
B
EA1 extension
0 to 1 V No specification for set boiler wa-
ter temperature
1 V
Set value 10 °C
10 V
Set value 100 °C
■
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.
Parameter
■
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.
■
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.
External functions — single boiler system
Connecting the external control unit
(cont.)
5863679
Installation
Summary of Contents for Vitotronic 11 CC1E
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