Dometic B57915 Installation & Operating Instructions

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Read these instructions carefully. These

instructions MUST stay with this product.

USA & CANADA

SERVICE OFFICE

Dometic Corporation

1120 North Main Street

Elkhart, IN, 46514

SERVICE CENTER &

DEALER LOCATIONS

Please Visit:

www.dometic.com

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

REVISION E

Form No. 3315079.016 6/18

(French 3315288.013_E)

©2018 Dometic Corporation

LaGrange, IN 46761

INSTALLATION & OPERATING

INSTRUCTIONS

Table of Contents

Other manuals for Dometic B57915

Installation And Operation Manual28 pages

Installation Instructions24 pages

Questions and Answers:

L
Lori PriceAug 19, 2025
Why is my Dometic B57915 Air Conditioner not maintaining the desired temperature?
- Z
  Zachary WrightAug 19, 2025
  Your Dometic Air Conditioner might struggle to maintain the desired temperature if the RV is gaining heat due to high outdoor temperatures or humidity. To mitigate this, park the RV in a shaded area. Additionally, use window shades, blinds, or curtains, keep windows and doors closed or minimize their use, and avoid using heat-producing appliances inside the RV. You can also operate the product in the High Fan/Cooling mode or start the product before the outside temperature increases.
J
Jesse HurleyAug 21, 2025
How to fix a Dometic B57915 Air Conditioner that won't turn on?
- A
  Amy GarciaAug 21, 2025
  If your Dometic Air Conditioner isn't working, check if the circuit breaker has been activated and reset it if necessary. Also, inspect the fuse and replace it if it has blown.
B
Bonnie PerezAug 23, 2025
What to do if my Dometic B57915 doesn't cool enough?
- A
  awebsterAug 23, 2025
  If your Dometic Air Conditioner isn't maintaining the desired temperature, consider that the RV's heat gain could be affected by high outdoor temperatures or humidity. Try parking the RV in a shaded area. Additionally, use window shades, blinds, or curtains, keep windows and doors closed or minimize their use, and avoid using heat-producing appliances inside the RV. You can also operate the product in the Turbo Fan/Cooling mode or start the product before the outside temperature increases.
R
Ryan FisherAug 26, 2025
What to do if frost forms on the evaporator coil of my Dometic B57915 Air Conditioner?
- N
  Nancy HendersonAug 26, 2025
  If you notice frost forming on the evaporator coil of your Dometic Air Conditioner, it could be due to very cold output at a very low air speed, or the outside temperature may be relatively low. First, inspect and clean the filter. Then, open the air vents and remove any obstructions. Confirm that a minimum of two distribution vents, or the quick cool vent and one vent, are open. Adjust the thermostat control knob to a warmer setting (counterclockwise). You can also operate the product on any Fan Only setting until the coil is free of frost.
M
Matthew GrahamAug 27, 2025
How to prevent condensation forming on ceilings from Dometic B57915 Air Conditioner?
- N
  Nathaniel EverettAug 28, 2025
  To reduce condensation forming on ceilings, windows, or other surfaces when using your Dometic Air Conditioner, keep doors and windows closed when the unit is in operation. This minimizes the amount of water vapor in the air that can condense on cooler surfaces.
C
Caitlin BurkeAug 30, 2025
Why does frost form on the evaporator coil of my Dometic Air Conditioner?
- C
  Crystal CookAug 30, 2025
  Frost can form on the evaporator coil of your Dometic Air Conditioner if the product is producing very cold output at a very low air speed. Inspect and clean the filter. Also, open the air vents and remove any obstructions. If the outside temperature is relatively low, adjust the thermostat control knob to a warmer setting (counterclockwise). You can also operate the product on any Fan Only setting until the coil is free of frost.
K
Kimberly FreemanSep 1, 2025
What to do if my Dometic Air Conditioner does not operate well when connected to the motor generator?
- C
  Colleen ElliottSep 1, 2025
  If your Dometic Air Conditioner isn't operating well and the RV is connected to the motor generator, confirm the motor generator is running and producing power. Also, confirm the fuse or circuit breaker is open and ensure the fuse is not blown, or circuit breaker is on and not activated.
L
Lynn MccormickSep 3, 2025
How to reduce condensation forming with my Dometic B57915 Air Conditioner?
- S
  Sean MaySep 3, 2025
  To reduce condensation forming on ceilings, windows, or other surfaces when using your Dometic Air Conditioner, keep doors and windows closed when the unit is in operation. This helps to reduce the amount of water vapor in the air that can condense on cooler surfaces.
J
jasonfloydSep 5, 2025
What to do if Dometic B57915 Air Conditioner is not working when connected to land line?
- T
  Theresa PetersonSep 5, 2025
  If your Dometic Air Conditioner isn't working or is operating poorly when connected to a land line, first confirm that the land line is plugged into the power supply and that it is properly-sized for the product's power load.
J
Jeffrey WardSep 7, 2025
What to do if Dometic B57915 Air Conditioner is not working when connected to generator?
- S
  sean97Sep 7, 2025
  If your Dometic Air Conditioner is not working, or working poorly, when connected to the motor generator, you should confirm the motor generator is running and producing power. Also, confirm the fuse or circuit breaker is open, ensuring the fuse is not blown, or the circuit breaker is on and not activated.

Dometic B57915 Specifications

General

Power Source	115V AC
Hertz	60 Hz
Cooling Capacity	15, 000 BTU
Installation Type	Roof-mounted
Fan Speed	3

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