32
90
F
D
E
BK
BN
T7T8
T6
BU
146
143
12
3
12
3
A
B
C
41
L
B4 S3T2 T1 N
41
L
B4
S3
T2
T1
N
Fig. 26
A
Plug to the control unit
B
Boiler enable
Butterfly valve OPEN or CLOSE
C
Burner with base load ON
D
Reduce burner output (modulation controller).
E
Increase burner output (modulation controller).
F
Plug to the burner
Colour coding to IEC 60757
BK Black
BN Brown
BU Blue
Connecting external safety equipment
Connection at plug
aBÖ
.
Note
Plug
aBÖ
must
remain plugged in, even if no connec-
tion is made.
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connections must be
potential-
free
.
Electrical connections
Connecting the modulating burner, multi boiler…
(cont.)
5863679
Installation
Summary of Contents for Vitotronic 11 CC1E
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