About Duo-Therm Air Conditioner Installation

A Duo-Therm Air Conditioner is designed for an RV. Just like any other vehicle, an RV or motor home needs air conditioning too so that you can be comfortable no matter what state or season you are in. Unlike a regular vehicle, the air conditioning unit doesn't go under the hood. 

1. Insert a screwdriver into the screws of the roof vent and remove them. Once the screws are removed, take the roof vent off and put it somewhere you will be able to find it if you ever want to take the air conditioning unit out. Clear away any caulking that may be in the frame.


2. Apply a good weather sealant all the way around the vent, especially in any holes or cracks that you may find in the seal. 


3. Place the Duo-Therm Air Conditioning unit on the roof with the flat part facing downward and the tapered end facing the front of the motor home. Make sure that the gasket fits in the vent. Do not slide the air conditioning unit along the roof, as the gasket is likely to get damaged and leak. 


4. Insert the upper part of the blowing system into the bottom blower discharge, which is on the bottom of the RV air conditioning unit.


5. Using the supplied screws, screw in the upper duct to the blower discharge. 


6. Pull the power cord and other wiring through the RV vent into the motor home cabin. 


7. Align the lower duct piece with the upper duct and insert the lower duct piece over the upper duct component. You want to make sure that the component sits flush with the ceiling. Bolt the lower duct piece to the rooftop air conditioner component with the provided screws and a screwdriver.


8. Insert the supply line into the opening of the junction box on the lower duct piece. Strip all wires back a half inch. Twist the white wire in the junction box and the white or neutral wire from the supply line together. Twist the black wire from the junction box and the black or hot wire from the supply line together. Insert the supply line ground wire into the ground screw inside the junction box and tighten the screw with the screwdriver. Install the junction box cover over the junction box and screw two screws into it to hold it in place. Plug the power cord into the power outlet on the control box.


9. Turn it on and make sure that the air conditioning unit is blowing cold air.