Challenge MEDALIST 820, Instructions And Parts Manual

Page: 53 / 80

53
F.669-D/820-870/Jan 98
ELECTRICAL SEQUENCE OF OPERATION
ELECTRICAL SEQUENCE OF OPERATION
A. Close the POWER switch.
B. Press the compressor ON switch.
C. Press the START button.
D. Adjust the SPEED CONTROL.
ELECTRICAL SCHEMATIC REFERENCES
(Drawings E-2657 & E-2658)
While the POWER switch is closed, power is brought to the transformer, provided the 8A fuse is conductive. The
transformer provides power to the start/stop circuit, and to the sheet counter. Opening the main disconnect
switch at any time cuts power to the transformer.
When the compressor ON switch is closed, power is brought to the compressor.
When the START switch is closed, the folder motor relay coil K will energize, provided the jam detector switch,
the rear guard switch, the emergency stop switch (opt.), and the stop switch are closed. Power is then supplied
to the folder motor, provided the 3.15A fuse is conductive. The relay coil K remains energized until any of the
above listed switches are opened.
The speed of the folder motor can be adjusted by turning the SPEED CONTROL knob.