Viessmann VITOTRONIC 100 GC1B Installation And Service Instructions Manual page 74

Installation Sequence
Burner Connection, Motor Power Supply
Legend
A Burner motor power supply 240VAC, 1PH
B Connection terminals and plug inside connection
enclosure
C Cable and conduit- factory supplied
D Burner
E Motor starter
F Burner motor
G Connection enclosure on boiler control
74
Vitotronic 100, GC1B Installation and Service
(continued)
For burners with 240VAC, 1PH power supply.
See burner manual for correct fuse
and wire gauge sizing, and specifi c
connections for Viessmann controls.
1. Disconnect power to burner and boiler control.
2. Connect 240VAC power to the terminals 21, 22 and 23
on the DIN rail inside the connection enclosure. Provide
fuseable 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.