Duke HDC3-37.5-208 Servicehandleiding - Pagina 4

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Service Manual for Dry Channel HDC3/HDC6 Units

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.
D R Y C
Relay
Box
Main Power
ON/OFF Switch
Figure 1. Dry Channel Major Components
4

INTRODUCTION

Tub
H A N N
E L T E
M P E R
A T U R
E
Display
Box
PR OG
I
Figure 2. Channels and Zones
Channel 3
Zones 3A & 3B
Channel 1
Zones 1A & 1B
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
DISPLAY
DISPLAY
On/O
Function Control
Button
Channel 2
Zones 2A & 2B
HEAT ON
READY
Select
Buttons