Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 53

Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only)
Burner motor power supply connection
(continued)
For burners with 240 VAC, 1PH power
supply and connection in conduit.
A Burner motor power supply
240 VAC, 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
Installation
(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 240 VAC 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.
53