Installation Guide
Tools Needed:
- Roof mounting kit
- Power drill with hole saw
- Screwdrivers (flat and Phillips)
- Wire strippers/crimpers
- Sealant (RV roof approved)
- Multimeter
Step-by-Step Installation
- Choose Installation Location: Select a location on the RV roof with adequate structural support and clearance from vents and antennas.
- Prepare Roof Opening: Mark and cut the roof opening according to the template provided in the installation kit.
- Install Roof Curb: Secure the roof curb to the roof structure using appropriate fasteners and seal thoroughly.
- Electrical Connection: Connect to the RV's 120V AC power supply following local electrical codes. Ensure proper grounding.
- Thermostat Wiring: Run low-voltage thermostat wires from the unit to the control panel location.
- Mount Air Conditioner: Lift the unit onto the roof curb and secure with provided fasteners.
- Seal and Test: Apply sealant around the base, install interior components, and test all functions.
Specifications
| Model Series | DM2004-RV Series |
| Type | Roof Mounted RV Air Conditioner |
| Color | White / Low Profile |
| Cooling Capacity | 13,500 BTU |
| Heating Capacity | Heat Pump Option Available |
| Noise Level | 58 dB (Low Speed) |
| Control Type | Digital Thermostat with LCD Display |
| Energy Rating | Standard Efficiency (Pre-2010) |
| Air Flow | 300 CFM (High Speed) |
| Power Requirements | 115V, 60Hz, 12.5A |
| Dimensions (LxWxH) | 28 x 28 x 12 inches |
| Weight | 78 lbs |
| Refrigerant Type | R-22 |
Warranty Information
- Original Warranty: 2 years parts and labor (expired)
- Compressor Warranty: 5 years (expired)
- Current Status: Out of warranty - parts may be available
For technical support, contact Dometic Customer Service at 1-800-544-4881 or visit Dometic.com
Key Features
Low Profile Design
Streamlined roof profile reduces wind resistance and improves fuel efficiency while maintaining optimal cooling performance for RV applications.
Multi-Speed Fan
Three-speed fan control allows for customized airflow, from quiet nighttime operation to maximum cooling during hot days.
Ducted Air Distribution
Optional duct kit available for even air distribution throughout the RV, eliminating hot spots and improving overall comfort.
Manual Thermostat Control
Simple rotary thermostat provides reliable temperature control with automatic compressor cycling for consistent cooling.
Quick-Install Design
Pre-charged refrigerant system and simplified electrical connections reduce installation time for RV manufacturers and technicians.
Corrosion-Resistant Construction
UV-stabilized housing and corrosion-resistant components ensure durability in marine and RV environments.
Operating Modes
Cooling Mode
Standard air conditioning operation with temperature control and fan speed selection
Fan Only Mode
Circulates air without cooling, ideal for ventilation and energy savings
Heat Pump Mode
Available on select models for efficient heating during mild weather
High Altitude Mode
Compensates for reduced efficiency at elevations above 2,000 feet
Economy Setting
Reduces compressor cycling for improved energy efficiency
Turbo Cool
Maximum cooling capacity for rapid temperature reduction
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, thermostat setting, circuit breaker | Check power supply, verify thermostat setting, reset breaker |
| Poor cooling performance | Dirty filters, low refrigerant, condenser blockage | Clean filters, check for leaks, clear condenser fins |
| Water dripping inside | Clogged drain tube, improper installation | Clear drain tube, check unit level and seal |
| Loud operation | Fan motor issues, loose components, debris | Check fan motor, tighten mounting hardware, clear debris |
| Compressor short cycling | Thermostat issues, refrigerant problems, electrical | Check thermostat calibration, refrigerant charge, electrical connections |
| Fan runs but no cooling | Compressor failure, capacitor issues, refrigerant leak | Check compressor, test capacitors, look for refrigerant leaks |
Common Issues & Solutions
- Tripping Breaker: Overload condition - Check for shorts, verify proper wire gauge
- Ice Formation: Low airflow or refrigerant issue - Clean filters, check fan operation
- Musty Odors: Mold growth - Clean evaporator coil and drain pan
- Thermostat Inaccuracy: Calibration needed - Recalibrate or replace thermostat
- Vibration Noises: Loose mounting - Tighten roof fasteners and check curb seal
- Reduced Airflow: Duct obstruction - Check and clear air distribution ducts
Manual Downloads
2004 Model Year Manuals
DM2004-RV
13,500 BTU RV AC
DM2004-HP
13,500 BTU Heat Pump
DM1504-RV
11,000 BTU RV AC
DM2004-M
Marine Version
Compatible Replacement Parts
DM2004-TS
Thermostat Assembly
DM2004-FM
Fan Motor Replacement
DM2004-COMP
Compressor Service
DM2004-DUCT
Duct Kit Installation