Burner - Viessmann Vitotronic 300 KW3 Installation Instructions Manual

Burner

To control
(RAST-5 plug-in connector)
To burner or vent system
( plug-in connector)
The burner cable is included in the standard boiler equipment.
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
Electrical connections
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.
WARNING
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.
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