Operating instructions

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E. “FAN” - Fan Mode
In FAN mode there are (4) fan speed selections:
LOW: The fan operates continuously at low speed.
MED: The fan operates continuously at medium speed.
HIGH: The fan operates continuously at high speed.
AUTO: The fan will be OFF.
F. “FURN” / “AQUA” - Furnace Or Aqua (Hydronic) Heating Mode
(Factory setting is “FURN”)
To change the setting from “FURN” to “AQUA” or vice versa, simultaneously press
the
 and  buttons. The LED will display the selected option.
In the FURN / AQUA mode the system will cycle the RV’s furnace/aqua ON and
OFF based on the room air temperature and the temperature set-point on the CCC 2
thermostat. The system can be confi gured to operate using an ON/OFF differential
of either 1 °F / °C or 2 °F / °C. This feature is programmed during the system ini-
tialization. See section, “B. System Confi guration & Initialization” on page (3).
To set the 1 °F / °C differential, simultaneously press the PROGRAM button and the
 button (“dIF1” will appear in the display while the buttons are pressed). To set the
2 °F / °C differential, simultaneously press the PROGRAM button and the  button
(“dIF2” will appear in the display while the buttons are pressed). In this mode there
are (4) fan speed selections:
LOW: The fan operates continuously at low speed.
MED: The fan operates continuously at medium speed.
HIGH: The fan operates continuously at high speed.
AUTO: The fan is OFF.
G. “AUTO” - Auto Change Over Mode
In the AUTO mode the system will automatically change the mode of operation from
cool to heat or from heat to cool. In order for this mode to operate, the zone being
programmed must contain either a heat pump, heat strip or furnace heating source.
When in the AUTO mode, all pre-programmed operations for the heat pump, heat
strip, and furnace will apply.
Auto Change Over Cooling: If the room temperature rises above the temperature
set-point by 2 °F / °C, the air conditioner will turn ON until the room temperature
reaches the temperature set-point at which time the air conditioner will cycle OFF.
Auto Change Over Heating: If the room temperature goes below the temperature
set-point by 2 °F / °C, the available heat source will be cycled ON until the room
temperature reaches the temperature set point at which time it will cycle OFF.
If more than one heat source is available on this zone, the priority for selecting the
heat source will be heat pump (fi rst), furnace (second), and heat strip (third).
MODE DESCRIPTION
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SPECIAL FEATURES
A. Auto Fan
When “AUTO” fan is selected, the fan speed will vary depending on the difference
between the temperature set-point and the room temperature. In “AUTO” fan, the
compressor and fan will cycle ON and OFF with the thermostat.
When the difference is:
8 °F / °C or more The fan operates on HIGH
5 to 7 °F / °C The fan operates on MED
4 °F / °C or less The fan operates on LOW
B. 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
conditioner/heat pump installed, you will have one zone. If your RV has more than
one cooling/heating system, you may have two, three, or four zones.
Your CCC 2 thermostat will operate cooling and heating appliances that your vehicle
manufacturer has designed to cool or heat specifi c 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 section, “D. Quick Reference
To LCD Icons” on page (5).
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 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 under main heading, “Pro-
gramming & Operations” on page (6).
C. Dehumidify (Select Models)
The Dometic CCC 2 thermostat will accommodate only one dehumidify air con-
ditioner 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 set to “AUTO,” 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.