Viessmann Vitotronic 100 Installation And Service Instructions Manual page 22

Electrical connections
External blocking via switching contact
!
Please note
During blocking, there is no frost protection
of the heating system. The boiler is not main-
tained at the lower boiler water temperature.
Codes
Plug
lH
"40:2" in group 1 "General"
Set the effect of the function on the heating circuit pump in coding address "d6" in group 5 "Heating circuit 1".
■
Set the effect of the function on the circulation pump for cylinder heating in coding address "5E" in group 3
■
"DHW".
Connecting a pressure-jet oil/gas burner
The burner cable is included in the standard delivery of
the boiler.
41
STB
TR
L1 N T1 T2 S3 B4
Fig. 19
To the control unit
A
To the burner
B
Burner without plug
Install the mating plug from Viessmann or from the
burner manufacturer; connect the burner cable.
2-stage/modulating burner extension
The function extension is supplied with the boiler.
22
(cont.)
EA1 extension
Set "3A" (DE1), "3b" (DE2) or "3C" (DE3) in group 1 "General" to 3.
Connect the burner in accordance with DIN 4791.
Max. power consumption 4 (2) A.
Terminal codes
L1
PE
N
T1, T2 Control chain
S3
B4
Equipment codes
STB Control unit high limit safety cut-out
TR Control unit temperature controller
H1 Burner fault signal
BZ Hours run meter
Max. power consumption
2-stage: 1 (0.5) A
■
Modulating: 0.1 (0.05) A
■
Phase via high limit safety cut-out to the burner
Earth conductor to burner
Neutral conductor to burner
Connection for burner fault
Connection for hours run meter
Signal pass direction:
Control unit Burner
→
Signal pass direction:
Burner Control unit
→