Installing a Duo-Therm air conditioner in your recreational vehicle (RV) can significantly enhance your comfort during those sweltering summer months. But how do you go about this task? This comprehensive guide will take you through every step of the process, ensuring you can enjoy a cool and comfortable environment in your RV.
To install a Duo-Therm Air Conditioner, first prepare the installation site on the roof of your RV, ensuring it can support the weight of the unit. Then, place the air conditioner on the roof, making sure it’s correctly positioned. Connect the wiring, including a dedicated 12 VDC line and a 4 Conductor Control Cable. Set up the air distribution box and connect the power supply. Finally, install the return air grills and filters, and turn on the power supply. Remember, it’s recommended to have a qualified service technician perform this installation for safety and proper functioning.
Preparing the Installation Site
Before you begin, it’s crucial to prepare the installation site. Here are some steps to guide you:
- Choose the Location: The air conditioner should be installed on the roof of the RV. The roof must be strong enough to support at least 130 pounds when the RV is in motion. A 200 lb. static load design typically meets this requirement.
- Positioning the Unit: For a single unit installation, mount the air conditioner slightly forward of center (front to back) and centered from side to side. For two units, install one air conditioner 1/3 from the front of the RV and the other 2/3 from the front, both centered from side to side.
- Check the Roof: The roof should be relatively flat and level, with a maximum slant of 15° to either side or front-to-back.
Placing the Air Conditioner on the Roof
Once the installation site is prepared, it’s time to place the air conditioner on the roof. Here’s how:
- Remove the Carton: Take the air conditioner out of the carton and discard the packaging.
- Place the Unit: Lift the air conditioner and place it over the prepared 14” x 14” opening. Ensure the blunt end of the air conditioner faces the rear of the RV.
Connecting the Wiring
Proper wiring is crucial for the air conditioner to function correctly. Follow these steps:
- Route a Dedicated 12 VDC Line: This line should run from the RV’s converter or battery to the roof opening.
- Connect to the Gas Furnace: If your system includes a gas furnace, route two 18 gauge thermostat wires from the furnace to the roof opening of the air conditioner that will control it.
- Install a 4 Conductor Control Cable: This cable (similar to a telephone cable) should run from the 14-1/4″ x 14-1/4″ (±1/8″) roof opening to the thermostat mounting location.
Setting Up the Air Distribution Box
The air distribution box helps direct the cool air from the air conditioner throughout your RV. Here’s how to set it up:
- Attach the Upper Discharge Air Duct: Use two of the six sheet metal screws provided to attach the upper discharge air duct to the bottom of the air conditioner.
- Install the Upper Duct: Remove the upper duct from the ceiling template duct and install it over the blower discharge opening.
- Connect the Power Supply: Connect the white wire to white, black to black, and green to green or bare copper wire. Use electrician’s tape to secure the twist connectors firmly to the wires.
- Plug in the Conduit: Plug the electrical conduit hanging from the bottom of the air conditioner into the mating connector on the switch box located on the ceiling template.
Finalizing the Installation
Finally, you’ll need to install the return air grills and filters, and turn on the power supply to the air conditioner. Here’s how:
- Install the Return Air Grills and Filters: Simply push them into place.
- Install the Knobs: Install the two knobs provided on the ends of the thermostat and selector switch shafts.
- Turn on the Power: Now, you can turn the power supply to the air conditioner ON.
Please note that this installation should be performed by a qualified service technician to ensure safety and proper functioning of the air conditioner.
Safety Precautions
The installation of an air conditioner involves working with electrical components, which can be dangerous if not handled correctly. Here are some safety precautions:
- Qualified Personnel: Only qualified service personnel should install and service the unit.
- Compliance with Codes: The installation must comply with the National Electric Code and all applicable state and local codes and regulations.
- Handling: Do not slide the air conditioner across the roof, as this could damage the neoprene rubber gasket on the bottom of the unit.
- Power Supply: Always ensure the power supply is OFF before connecting power supply leads to the air conditioner.
In conclusion, while the installation of a Duo-Therm Air Conditioner can be a complex process, it can be achieved with careful planning and attention to detail. If you’re uncomfortable with any part of the installation process, consider hiring a professional to ensure your air conditioner is installed correctly and safely.
Frequently Asked Questions
What is the purpose of the 4 Conductor Control Cable in the installation process?
The 4 Conductor Control Cable is used to connect the air conditioner to the thermostat. This connection allows you to control the temperature and other settings of the air conditioner from the thermostat.
Can I install the Duo-Therm Air Conditioner on my own, or do I need professional help?
While the guide provides a comprehensive overview of the installation process, it’s recommended that only qualified service personnel install and service the unit. This ensures safety and proper functioning of the air conditioner.
What should I do if my RV’s roof is not strong enough to support the air conditioner?
If your RV’s roof is not strong enough to support the air conditioner, it’s recommended to have it reinforced by a professional. This will prevent any potential damage to the roof or the air conditioner.
What precautions should I take when handling the air conditioner during installation?
Always ensure that the power supply is OFF before connecting power supply leads to the air conditioner. Also, do not slide the air conditioner across the roof as this could damage the neoprene rubber gasket on the bottom of the unit.
What is the purpose of the return air grills and filters in the air conditioner?
The return air grills and filters in the air conditioner are designed to filter out dust and other particles from the air before it’s cooled and circulated throughout your RV. This ensures that you’re breathing clean, cool air.
