Carter-Hoffmann CW4 - Manual (Page 9)

9
PROGRAMMING INSTRUCTIONS (Units with Digital Controls)
To Change the Temperature Range:
The temperature range is the range that the cabinet is designed to
operate within. With the cabinet power off, press and hold the UP and
DOWN arrow buttons. While still holding in the arrow buttons, turn
back on the power to the cabinet. The display will read: Ser F and
then F (if temperature scale is set to F) will display.
To change the range, press and release the TEMP SET button. The
display will read: rLo and then the current low temperature range set
point. To change the temperature, press the UP or DOWN arrows
until the desired temperature is displayed. The low setting should be
set to 140°F.
Press the TEMP SET button again. The display will read Rhi. and
then the current high temperature range set point. To change the tem-
perature, press the UP or DOWN arrows button until the desired tem-
perature is displayed. The high setting should be set to 200°F. Turn
off the power to the cabinet to save the changes in the controller
memory.
To Change the Alarm Range:
The alarm range is the range that the low temperature alarm is de-
signed to operated under. The alarm range should be programmed
for 140°F Maximum and 65°F Minimum. The cabinet low tempera-
ture alarm can be programmed to operate within these two set points.
With the cabinet power off, press and hold the UP and DOWN arrow
buttons. While still holding in the arrow buttons, turn back on the pow-
er to the cabinet. The display will read: Ser F and then F will display.
(if temperature scale is set to F) To change the range, press and re-
lease the ALARM RESET button. The display will read ALo and then
the current low alarm temperature set point. To change the low alarm
temperature, press the UP or DOWN arrows until the desired tempera-
ture is displayed. The low setting should be set to 65°F.
Press the ALARM RESET button again. The display will read AHi and
then the current high alarm temperature set point. To change the high
alarm temperature, press the UP or DOWN arrows until the desired
temperature is displayed. The high setting should be set to 140°F.
Turn off the power to the cabinet to save the changes in the con-
troller memory.
Down
arrow
Up
arrow
Alarm
set
Temp
set
165
DIGITAL CONTROL
Default values
-temp set point:180°F
-operating range:140-200°F
-low temp alarm: 140°F
--temp scale: °F