Burner Connection, Burner Control Wiring - Viessmann VITOTRONIC300 Installation And Service Instructions Manual

Vitotronic 300, GW2B Installation and Service

Burner Connection, Burner Control Wiring

Legend
A To boiler control unit
B To burner
Legend
A To plug-in connection in the Vitotronic boiler control
junction box
B To burner
For burners with plug-in connection
The burner cables are included in the standard delivery
of the Vitotronic. Connect the burner in accordance with
applicable codes.
Terminal codes
L Phase via fixed high limit to the burner
Ground connection
?
N Neutral connection to the burner
T1,T2 Control circuit
S3 Connection for burner fault indicator
B4 Connection for burner hours counter
1. Disconnect power to burner and boiler control.
2. Connect plugs fA and plug lÖ to respective counter
plugs in boiler control unit.
3. Connect the 7-pole plug fA and the 3-pole plug lÖ
to the burner.
CAUTION
This is a generic connection drawing only!
Follow the burner manufacturer's connection drawings
for Viessmann controls.
Terminal codes
1,2,3 Control circuit "2nd stage burner or modulation
controller" (via two-point controller with
2-stage operation; via three-point controller with
modulating operation)
1 From burner
2 Modulating down
3 Modulating up/2nd stage ON
Color codes as applicable
BK Black
BN Brown
BU Blue
Installation Sequence
51