CACG/CAHG/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
44
P/N 240008108, Rev. G [07/08/10]
control through the 7-Day Programming
mode.
Th
e Pre-Program Run mode can be en-
1.
tered from Cooling mode, Heating mode
or Auto mode only.
Pre-Program Run mode cannot be en-
2.
tered from Dry or Fan modes.
Pressing the PROGRAM
3.
button
momentarily will enter or exit the Pre-
Program Run mode.
Th
e word “PROGRA
M” will appear in
4.
the LCD display.
The setpoint will change to the pro-
5.
grammed sett ing at the selected time.
To use the Pre-Program Run mode fi rst enter
the program sett ings through the 7-Day Pro-
gramming mode.
Select a mode of operation (Cooling,
1.
Heating, Auto) and press the PROGRA
M
butt on to enter Pre-Program Run
mode.
As time passes, the setpoint temperature
2.
will be selected according to the time of
day and 7-Day Program sett ings.
To override the setpoint while in Pre-
3.
Program Run mode, adjust the tempera-
ture using the UP or DOWN ARROW
butt ons. Th
e override sett ing will remain
in eff ect until the next scheduled event.
(Morning, Day, Evening, Night) At that
time, the setpoint will be the value se-
lected in 7-Day Programming mode.
Clean Filter Alarm
To aid in fi lter maintenance, the cassett e con-
troller will indicate when a scheduled fi lter
cleaning is required by fl ashing the Timer/
Alarm LED. During normal operation, the
microprocessor will keep track of the units
run time.
When the clean fi lter time has elapsed,
1.
the Timer/Alarm LED will flash four
times to indicate that the fi lter needs to
be cleaned.
Th
e clean fi lter time is selectable through
2.
the Confi guration mode of the Optional
Infrared Hand Held Controller.
Available sett ings are 250, 500, 750, 1000,
3.
and 1250 hours.
If a coil freeze condition is detected four
4.
times within a 24-hour period, the Clean
Filter Alarm will appear.
Aft er fi lter maintenance has been performed,
press the Clear Filter Warning butt on for three
seconds. Th
e control will respond with a beep
to indicate that the timer has been reset.
Sleep timer
Th
e sleep timer feature allows the user, with
the push of a single butt on, to have the unit
switch off using the preset timer. When
the control is in the On mode, pressing the
TIMER butt on will enter or exit the Sleep
Timer mode.
When in Sleep Timer mode, the word “TIM-
ER” will appear on the LCD display. Th
e unit
will continue to operate for thirty minutes ,
then switch off .
To turn the unit back on, press the POWER/
SEND butt on momentarily.
CACH/CAHH/CAHK Microprocessor Controller Operation
(continued)