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Special Features
Auto Fan
When auto fan is selected the fan speed will vary depending on the difference be-
tween the temperature set-point and the room temperature. In auto fan the compres-
sor and fan cycle On and OFF with the thermostat.
When the difference is:
8º or more The fan operates on HIGH
5º to 7º The fan operates on MED
4º or less The fan operates on LOW
Zone Control
Zones are established at the time of the installation of your Dometic CCC 2 thermo-
stat. A zone is an area of cooling/heating which is controlled independently by the
CCC 2 thermostat. The CCC 2 thermostat allows for four zones (Air Conditioner/
Heat Pump) to be set up and run independent of each other. If you have one air con-
ditioner/heat pump installed, you will have one zone. If your RV has more than one
cooling/heating system, you may have 2, 3, or 4 zones.
Your CCC 2 thermostat will operate cooling and heating appliances that your vehicle
manufacturer has designed to cool or heat specic areas (zones) of your RV. The
CCC 2 thermostat will advise you of the number of zones in your RV. The zones are
displayed 1, 2, 3, or 4 in the LCD readout. See “Quick reference to icons” on page
3. In the event your vehicle has multiple zones designed, you have the freedom of
selecting different modes of operations for each zone. To change from one zone
to another, press the ZONE push-button on the CCC 2 thermostat. Each time the
button is pressed and released the indicator will change the zone data displayed.
When the zones have been programmed, the zones in operation will be displayed.
To program each zone, simply repeat the programming steps shown in the operation
section of this manual.
Dehumidify (Select Models)
The Dometic CCC 2 thermostat will accommodate only one dehumidify air condi-
tioner within the four zones. The dehumidify air conditioner can either be zone 1, 2,
3, or 4. The dehumidify air conditioner must have the DEHUMIDIFY dip switch set to
the ON position when the unit is installed.
When the relative humidity is above the humidity set-point the compressor will cycle
ON and if the fan is in the AUTO mode it will run on LOW speed. If LOW, MED or
HIGH speed is selected the fan will run in the speed selected. When the humidity is
5% or less than the humidity set-point the compressor will cycle OFF.
The dehumidify feature does not permit operation under the following conditions:
• Outdoor temperature is below 40º F. Resumes operation above 45º F.
• Indoor temperature is below 62º F. Resumes operation above 65º F.
• Indoor temperature is above 100º F. Resumes operation below 97º F.
• When the zone with dehumidify is set to COOL mode and the indoor tem-
perature is 2º F. above the COOL mode set-point. Resumes operation when
indoor temperature is 2º F. below COOL mode set-point
• When the freeze sensor temperature is 27º F. or less. Resumes when freeze
sensor temperature reaches 55º F.
• If the system detects an error on any of the system temperature sensors.
When the system calls for furnace operation, the dehumidify feature will continue to
operate unless one of the conditions above occurs.
Program 1 & 2
The Dometic CCC 2 thermostat can store two operating programs. Each program
can be set on individual zones with different mode and time settings for each zone.
For each event the user can program the operating mode, fan speed, temperature
set-point, and the time of day for the event.
1. Select the zone to be programmed.
2. Select program 1 by pressing the PROGRAM button. “PROG 1” icon will blink
on the LCD display.
3. Press the CLOCK button to set the time of day for program to start.
4. Press the MODE button to select the mode of operation.
5. Press the FAN button to select the fan speed.
6. Press the PROGRAM button to save the “PROG” 1 settings. LCD will now show
“PROG 2”.
To set program 2, repeat steps 3 - 5.
Press the Program button again to save programs in memory. Depending on the
time of day, program 1 or 2 will begin immediately. For instance, if program 1 is set to
begin at 10:00 AM and the time of day is 10:30 AM, program 1 will begin immediately.
On the other hand, if program 1 is set to 10:00 AM and program 2 is set to begin at
6:00 PM and the time of day is 7:00 PM, program 2 will begin immediately.