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How to install a 15k BTU air conditioner on an RV

This is a guide for installing and maintaining the 15k RV AC and heat pump unit from RecPro. All of the info below is from the appliance manual and formatted into a mobile friendly view. This SKU number for this AC is RP-AC3800-P and this model includes a condensate pump.


Exposed RV ceiling wiring with orange Wago clamp connectors hanging down during rooftop air conditioner replacement.

RV Wire Clamps

Diagram showing RV air conditioner power connection with 3-pole terminal block for active, neutral, and ground wires.

Connect AC Power

Diagram showing self-leveling RV roof sealant applied in a closed circle around the air conditioner gasket to prevent roof leaks

AC Roof Sealing

This is a diagram image of the contents of the package layered in order of assembly.

AC Contents

Diagram showing wiring and terminal block connections for a ducted RV air conditioner

Ducted Connection

Diagram showing the plenum mounting bracket and metal clamping bars being installed to connect the indoor and outdoor RV air conditioner units.

Plenum Mounting

Diagram showing correct RV air conditioner placement facing travel direction, centered on the roof with required clearance for airflow.

AC Position

Diagram showing how to measure and install the air flow separation baffle in a ducted RV air conditioner

Baffle Install

Illustration showing how to attach the outlet air duct to the bottom of an RV air conditioner using truss head screws from inside the vehicle.

Attach Air Duct

Diagram showing wooden support blocks around a 14¾-inch roof opening for RV air conditioner installation, reinforcing the roof to prevent crushing and air leaks.

Load check

Diagram showing how to connect the control cable and attach the plenum assembly to the mounting bracket during RV air conditioner installation.

Install Plenum

RV air conditioner diagram showing how to position the outdoor unit over the roof gasket and square opening.

Align Gasket

A diagram of the parts related to installing the ducted RV air conditioning unit.

Ducted Contents

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