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Vitotronic 300, GW2B Installation and Service
Installation Sequence
Burner Connection, Motor Power Supply
(continued)
Burner motor power supply connection
(continued)
For burners with 3PH 208, 460 or 575V power supply.
CAUTION
During commissioning check for correct motor rotation.
If motor rotates in opposite direction than indicated on
the burner, disconnect power supply and reverse wires
BK1 and BK2 on the burner terminals.
See burner manual for correct fuse
and wire gauge sizing, and specific
connections for Viessmann controls.
1. Disconnect power to burner and boiler control.
2. Connect 3PH power to the terminals 21, 22, 23
and 24 on the DIN rail inside the connection
enclosure. Provide fuseableb disconnect means
according to local codes.
3. Connect supplied power cable to the motor terminals
on the burner.
4. Connect cable plug to the socket on the DIN rail in
the connection enclosure.
Legend
A
Burner motor power supply 3PH 208, 460 or 575V
B
Connection terminals and plug inside connection
enclosure
C
Cable and conduit- factory supplied
D
Burner
E
Motor starter
F
Overload
G
Burner motor
H
Boiler junction box