Technical data

Installation
54
Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only) (continued)
Burner motor power supply connection
(continued)
For burners with 3PH 208, 460 or
575V power supply.
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.
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
5285 941 v1.5
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.
CAUTION