Dometic - Air Conditioner Model 457915/B57915 - Installation & Operating Instructions - Revision D

Oct 23, 2026

Installation & operating instructions for a Dometic rooftop air conditioner for recreational vehicles (RV), including identification details, safety guidance, required roof and wiring considerations, and step-by-step installation procedures. The guide covers selecting the proper unit location, preparing the roof, placing and installing the unit, connecting 120 Vac power, and installing the ADB. Operating sections explain available controls and fan, cooling, heating (electric heater option), and center air discharge functions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages15

Reading Time38 min

AccessFree to download

INTRODUCTION

DOCUMENT SYMBOLS

IMPORTANT SAFETY INSTRUCTIONS

SPECIFICATIONS

Table-Unit Data

Roof Requirements

INSTALLATION INSTRUCTIONS

Choosing Proper Location For Unit

Roof Preparation

Wiring Requirements

Placing Unit On Roof

Installation Preparation

Duct Divider Installation

Installing Unit

120 Vac Power Supply Connection

Installing ADB

OPERATING INSTRUCTIONS

Controls

OFF Position

Cooling Operation

Heating Operation

Fan Operation

Center Air Discharge

Read these instructions carefully. These instructions MUST stay with this product. | Roof Top Unit | | | | | --- | --- | --- | --- | | Description | Model | Use With Air Distribution Box | | | | | Model | Control | | Air Conditioner | 457915
B57915
459516
B59516
540315
H540315
540316
H540316
640312
640315
640316 | 3314851.000 | Integral Mechanical | RECORD THIS INFORMATION FOR FUTURE REFERENCE: Model Number Serial Number ADB Model Number ADB Serial Number Date Purchased INSTALLATION & OPERATING INSTRUCTIONS REVISION D Form No. 3315079.016 01/18 (French 3315288.013_D)©2018 Dometic Corporation LaGrange, IN 46761 USA & CANADA SERVICE OFFICE Dometic Corporation 1120 North Main Street Elkhart, IN, 46514 SERVICE CENTER & DEALERLOCATIONS Please Visit: [www.dometic.com](www.dometic.com) INTRODUCTION This air conditioner (hereinafter referred to as “unit” or “product”) is designed and intended for installation on the roof of a Recreational Vehicle (hereinafter referred to as RV) during or after the time it is manufactured. This unit can be installed by one person with brief help from additional personnel. Use these instructions to ensure a properly installed, and properly functioning product. Dometic Corporation reserves the right to modify appearances and specifications without notice. TABLE OF CONTENTS INTRODUCTION ..................................................................................................................................................................2 DOCUMENT SYMBOLS.......................................................................................................................................................2 IMPORTANT SAFETY INSTRUCTIONS ............................................................................................................................3 A. Recognize Safety Information ...................................................................................................................................3 B. Understand Signal Words..........................................................................................................................................3 C. Supplemental Directives ............................................................................................................................................3 D. General Safety Messages .........................................................................................................................................3 SPECIFICATIONS ................................................................................................................................................................4 A. Table-Unit Data ........................................................................................................................................................4 B. Roof Requirements....................................................................................................................................................4 INSTALLATION INSTRUCTIONS .......................................................................................................................................4 A. Choosing Proper Location For Unit ...........................................................................................................................4 B. Roof Preparation .......................................................................................................................................................6 C. Wiring Requirements ................................................................................................................................................. 7 D. Placing Unit On Roof ................................................................................................................................................. 7 E. Installation Preparation .................

FAQs

What is the intended installation location for this Dometic air conditioner?

It is designed to be installed on the roof of a recreational vehicle (RV) during or after the time the RV is manufactured.

How should the instructions be used to ensure proper operation?

Use the instructions to ensure the product is properly installed and properly functioning, including following safety and installation requirements.

What operating modes and controls are covered in the operating instructions?

The guide covers controls and describes OFF, cooling operation, heating operation (with the electric heater option), fan operation, and center air discharge.

Oct 23, 2026

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