CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240007756, Rev. A [051509]
35
Made in the USA
Setting the CACH/CAHH Controller
Configuration settings for CACH/CAHH
Figure 36
Setting Item Display Possible Value
(flashing)
Factory
Settings
Overview
To access:
Press MODE and PROGRAM together for 5 seconds, repeat to exit
Navigating through settings:
Press PROGRAM to move to the next setting or CLOCK to move to the
previous setting; to change values, use the UP and DOWN keys; when value is reached, move to the next
setting using the PROGRAM or CLOCK button; values are stored on exit from programming mode.
Temperature
scale
01 F-C
F
C
Fahrenheit
Celsius
F
Select temperature scale for display and operating settings.
Heat source
02 HEAT
ON
OFF
Available
Not
available
See
Note 3
Set this to ON if the unit is equipped with the electric heater
option.
The electric heater is required for DRY mode operation and for
automatic changeover operation.
Heat pump
(see Note 1)
03 H-P
ON
OFF
Available
Not
available
OFF
Set this to ON if the unit is built for heat pump operation and
connected to an appropriate compressor unit.
Auto
changeover
differential
(see Note 2)
04 d-b
x
2° – 6°
2°
Auto changeover automatically operates the unit in heating or
cooling based on room temperature versus setpoint.
This setting is the dead band temperature:
Cooling is on while room temperature is at setpoint PLUS
•
dead band.
Heating is on while room temperature is at setpoint MINUS
•
dead band.
Example: setpoint = 68°F, dead band is 3°F — cooling is on
•
with room temperature at or above 71°F — heating is on
with room temperature at or below 65°F.
Check filter
time
05 F:Lt
2
5
7
10
12
250 hours
500 hours
750 hours
1000 hours
1250 hours
10
Set this time for automatic notice of time to change the
filter. At the end of the time period, the control will display a
FILTER CHECK warning. This warning will also appear if four
evaporator freeze-ups should occur in a 24-hour period.
Reset the warning, restarting the time period, by pressing
MODE and FAN buttons together for 3 seconds.
Setting
Note 1
04
, Heat pump, is
SKIPPED
if setting
03
, Heat source, is
OFF
.
Setting
Note 2
05
, Auto changeover, is
SKIPPED
if setting
03
, Heat source, is
OFF
. This setting is for operation with handheld
controller.
Factory setting is ON if electric heat is installed in unit, or OFF if electric heat is not installed.
Note 3