Service Manual for Dry Channel HDC3/HDC6 Units
4
On/Off
Function Control
Button
Select
Buttons
DISPLAY
DISPLAY
HEAT ON
READY
GENERAL
The Duke HDC3 Dry Channel unit maintains the
factory set point temperature on 3 channels (front,
back, and center). The Duke HDC6 Dry Channel
unit maintains the factory set point temperature
on 6 channels. Each channel has an A and B
zone. The Main Power On/Off Switch is located
on the Relay/Control Box (herein after referred to
as Relay Box). A display panel will cycle through
the temperature of each channel followed by fault
messages if a fault is detected.
The display temperature will be the average of
the two zones.
INTRODUCTION
Relay
Box
Display
Box
I
DRY CHANNEL
TEMPERA
TURE
PROG
Tub
Main Power
ON/OFF Switch
Channel 3
Zones 3A & 3B
Channel 1
Zones 1A & 1B
Channel 2
Zones 2A & 2B
Figure 1.
Dry Channel Major Components
Figure 2.
Channels and Zones
Pressing the ON button on the Control Display
activates the display. Pressing the up arrow
will cycle through the six temperature zones,
displaying the actual temperatures. Pressing
the down arrow will cycle through the set point
temperature for each channel. The factory set
point temperature is 275°F. The HEAT ON LED
will indicate an activated relay in any zone. The
READY LED is activated when all zones reach
the set point temperature. A fault message will
be displayed to indicate any zone that does
not reach the set point temperature within 45
minutes of power up.
Figure 3.
Control Display
