Electrical connections
17
Burner
The burner cable is included in the standard boiler equipment.
To control
(RAST-5 plug-in connector)
To burner or vent system
(
plug-in connector)
Terminal codes
L1
Line via safety high limit
PE
Ground conductor to the
burner
N
Neutral conductor to the burner
T1, T2 Control circuit
S3
Connection for burner fault
B4
Connection for operating
hours counter
The Vitotronic 300 is prewired with the
Viessmann quick-connect plug-in
system.
1.
Connect the
RAST-5 plug-in
connector to the main circuit
board of the control.
2.
Connect 7-pole
plug to the
counter plug of the burner.
Or
if installing a vent system
(accessory), connect 7-pole plug to
counter plug of vent system.
Refer to technical instructions
of the burner and/or wall vent
system
.
5
3
0
3
2
6
9
v
1
.3
Do not connect the 41-plug from the
boiler control directly to the burner if
a wall vent or flue damper / vent
damper is installed.
See technical instructions of the vent
system.
WARNING
Summary of Contents for Vitotronic 300 KW3
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