Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual page 52

Installation – Vitotronic 100, GC1
Burner connection, burner control wiring
Burner motor power supply connection
For burners with 3PH 208, 460 or
575V power supply.
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 Connection enclosure
52
(continued)
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 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.
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.