1. Introduction
The Dometic Duo Therm Comfort Control 2 (CCC2) is an advanced thermostat designed for precise climate control in recreational vehicles (RVs). This unit allows for accurate temperature management and can control up to four zones independently, providing optimal comfort. Featuring a large, easy-to-read SMX blue light display and built-in error codes for simplified diagnostics, the CCC2 enhances your RV living experience.
Image 1.1: The Dometic Duo Therm Comfort Control 2 (CCC2) in black, a programmable thermostat for RV HVAC systems.
2. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions could result in property damage, personal injury, or death.
- Always disconnect power to the RV's HVAC system before performing any installation or maintenance.
- Installation should be performed by a qualified technician if you are unsure about any steps.
- Ensure all wiring connections are secure and comply with local electrical codes.
- Do not expose the control unit to water or excessive moisture.
- Keep children away from the control unit during operation and maintenance.
3. Package Contents
Verify that all items are present in the package:
- 1 x Dometic Duo Therm Comfort Control 2 (CCC2) Thermostat Unit
- 1 x Installation and Operation Manual (this document)
- Mounting hardware (screws, wall anchors)
Note: Additional components such as the air distribution box or specific wiring harnesses for your RV's HVAC system are sold separately and are required for a complete installation.
4. Installation
This section provides general guidelines for installing the Dometic CCC2 thermostat. Specific wiring and mounting procedures may vary based on your RV model and existing HVAC system. Consult your RV's manufacturer manual for detailed wiring diagrams.
4.1. Mounting Location
- Choose a central location on an interior wall, away from direct sunlight, heat sources, or drafts, to ensure accurate temperature readings.
- Ensure there is sufficient space for wiring access behind the thermostat.
4.2. Wiring Connections
The CCC2 thermostat typically connects to your RV's HVAC system via a multi-conductor cable. The back of the unit features a phone-jack style connector (RJ11 or similar) for communication with the main control board of your Dometic HVAC system.
- Power Disconnection: Turn off all power to the RV's HVAC system at the circuit breaker or fuse panel.
- Remove Old Thermostat: Carefully remove your existing thermostat from the wall. Disconnect any wiring, noting the color and terminal connections for reference.
- Mounting the CCC2: Secure the CCC2 mounting plate to the wall using the provided screws and anchors. Ensure the plate is level.
- Connect Wiring: Connect the multi-conductor cable from your HVAC system to the phone-jack style port on the back of the CCC2 unit. Ensure the connection is firm and secure.
- Attach Thermostat: Snap or screw the CCC2 thermostat unit onto its mounting plate.
- Restore Power: Restore power to the RV's HVAC system. The thermostat display should illuminate.
If your RV's wiring does not have a compatible phone-jack style connector, an adapter or professional installation may be required. Refer to the Dometic service manual for detailed wiring diagrams specific to your HVAC system.
5. Setup and Configuration
Upon initial power-up or after a power interruption, the CCC2 may require basic setup. The large SMX blue light display will guide you through the process.
- Initial Boot: The display will show a startup sequence.
- Zone Selection: If your system supports multiple zones, you may be prompted to select or configure zones. The CCC2 can control up to four zones independently.
- Mode Selection: Choose your desired operating mode (e.g., Cool, Heat, Fan, Auto).
- Temperature Setting: Use the touch controls to set your desired temperature.
6. Operating Instructions
The Dometic CCC2 features intuitive touch controls and a clear LCD display for easy operation.
6.1. Basic Operation
- Power On/Off: Press the Power button to turn the unit on or off.
- Mode Selection: Press the Mode button to cycle through available modes: Cool, Heat, Fan, Auto, Off.
- Temperature Adjustment: Use the Up/Down arrows on the touch screen to adjust the set temperature.
- Fan Speed: In Fan or Cool/Heat modes, press the Fan button to cycle through fan speeds (Low, Medium, High, Auto).
6.2. Zone Control
If your RV has multiple HVAC zones, the CCC2 allows individual control:
- Press the Zone button to select the zone you wish to control. The active zone will be indicated on the display.
- Adjust the mode, temperature, and fan speed for the selected zone as desired.
6.3. Programmable Features
The CCC2 is a programmable thermostat, allowing you to set schedules for temperature changes throughout the day or week. Consult the detailed user manual for programming instructions.
7. Maintenance
Regular maintenance ensures optimal performance and longevity of your Dometic CCC2 thermostat.
- Cleaning: Wipe the display and exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Sensor Clearance: Ensure the temperature sensor (usually a small opening on the unit) is free from dust and obstructions for accurate readings.
- System Checks: Periodically check your entire RV HVAC system, including air filters and outdoor units, as recommended by their respective manufacturers.
8. Troubleshooting
The Dometic CCC2 is equipped with built-in error codes to assist in diagnosing issues. If a problem occurs, an error code may appear on the display.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power to the unit. | Check RV circuit breakers/fuses. Ensure all wiring connections are secure. |
| Incorrect temperature reading | Sensor obstructed or located near heat/cold source. | Clear any obstructions from the sensor. Relocate thermostat if necessary (professional assistance recommended). |
| HVAC system not responding | Communication error or system fault. | Check for error codes on the display and consult the full Dometic service manual for specific code meanings. Verify cable connections. |
| Zone control issues | Incorrect zone configuration or wiring. | Review zone setup in the thermostat menu. Inspect wiring to individual zone components. |
For persistent issues or specific error codes, contact Dometic customer support or a certified RV technician. The built-in error codes are designed to assist factory or dealer assistance.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Dometic |
| Model Number | 3314082.000 (also known as 3312024.000) |
| Controller Type | Touch Control |
| Special Feature | Light Display (SMX blue light) |
| Color | Black |
| Specific Uses | HVAC Systems (RV applications) |
| Temperature Control Type | Programmable |
| Connectivity Technology | Wired (RJ11-style connection) |
| Power Source | Corded Electric (24 Volts) |
| Item Weight | 0.01 Ounces |
| Product Dimensions | 7.8 x 0.6 x 2.5 inches |
| Display Type | LCD |
| Mounting Type | Wall Mount |
| Backlight | Yes |
10. Warranty and Support
For warranty information, technical support, or to purchase replacement parts, please contact Dometic customer service directly. Keep your purchase receipt and product model number handy when contacting support.
- Dometic Website: www.dometic.com
- Customer Service: Refer to the Dometic website for regional contact information.
