Dometic Blizzard NXT User Manual

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CLIMATE CONTROL

AIR CONDITIONERS

Form No. 3317817.000 1/21 | ©2021 Dometic Corporation

WARNING

Cancer and Reproductive Harm

www.P65Warnings.ca.gov

Brisk Air (457915, 459516), Brisk II (B57915, B59516),

High Performance (540315, 540316), Blizzard NXT (H540315, H540316),

Penguin (640312, 640315, 640316), Penguin II (640312C, 640315C, 640316C),

FreshJet (FJX3473, FJX3573)

EN

Value Air Distribution Box,

Mechanical

Installation and Operation Manual . ........2

Table of Contents

Questions and Answers:

E
eryanAug 19, 2025
Why is my Dometic Blizzard NXT Air Conditioner not maintaining the desired temperature?
- M
  Monica AtkinsonAug 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.
M
Mark CarterAug 21, 2025
How to fix a Dometic Blizzard NXT Air Conditioner that won't turn on?
- E
  Edward HahnAug 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.
E
ejonesAug 23, 2025
What to do if my Dometic Blizzard NXT doesn't cool enough?
- M
  Matthew RodriguezAug 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.
H
hsmithAug 26, 2025
What to do if frost forms on the evaporator coil of my Dometic Blizzard NXT?
- M
  Mr. Dylan PerezAug 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.
T
Tracy YangAug 27, 2025
How to prevent condensation forming on ceilings from Dometic Blizzard NXT?
- M
  malloryfischerAug 27, 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.
B
Brandon MartinAug 30, 2025
Why does frost form on the evaporator coil of my Dometic Blizzard NXT Air Conditioner?
- R
  Ross NicholsAug 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.
Z
Zachary GardnerSep 1, 2025
What to do if my Dometic Blizzard NXT does not operate well when connected to the motor generator?
- C
  Christopher WilsonSep 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.
M
Michelle ShawSep 3, 2025
How to reduce condensation forming with my Dometic Blizzard NXT?
- N
  Nicole MartinezSep 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.
D
david38Sep 5, 2025
What to do if Dometic Air Conditioner is not working when connected to land line?
- R
  Rachel WalkerSep 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
Jennifer ReedSep 7, 2025
What to do if Dometic Blizzard NXT Air Conditioner is not working when connected to generator?
- A
  Angela GardnerSep 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 Blizzard NXT Specifications

General

Fan Speeds	3
Color	White
Refrigerant	R410A
Power Source	115V AC
Product Height Dimensions	13.5 inches
Rated Input Voltage	115 V AC

Summary

Explanation of Symbols and Safety Instructions

Recognize Safety Information

Explains the safety alert symbol and its meaning for injury prevention.

Understand Signal Words

Defines signal words like DANGER, WARNING, CAUTION to indicate hazard levels.

Supplemental Directives

Provides essential directives for safe installation, operation, and service.

General Safety Messages

Lists crucial safety warnings related to electrical shock, fire, and explosion hazards.

Intended Use

General Information

Tools and Materials

Lists recommended tools and materials for installation and service.

Model Identification

Explains where to find model and serial number identification labels.

ADB Components

Identifies the main components of the Value Air Distribution Box (ADB).

Rooftop Component Dimensions by Model

Details external dimensions and clearance measurements for various air conditioner models.

ADB Component Dimensions

Provides internal dimensions for the ADB component.

Placement Requirements

Outlines requirements for positioning the rooftop component on the RV.

Tilt Requirements

Specifies tilt allowance for rooftop component installation.

Specifications

Wiring Diagrams

Pre-Installation

Determining Your Cooling Needs

Guides users on factors to consider when determining cooling requirements.

Preparing the RV Roof Opening

Details procedures for preparing the RV roof opening for installation.

Using an Existing Roof Vent Opening

Instructions for preparing an existing roof vent opening.

Making a New Roof Opening

Instructions for cutting and preparing a new roof opening.

Routing the Wiring

Describes how to route the power supply wiring for the rooftop component.

Positioning the Rooftop Component

Guides on how to position the rooftop component for installation.

Preparing to Work Inside the RV

Details the interior preparation steps before installing the ADB.

Installation

Installing the Foam Dividers

Explains how to determine and install foam dividers based on roof thickness.

Roof Thickness 1.25 to 5.5 in.

Provides guidance for foam divider installation for specific roof thicknesses.

Roof Thickness 6.0 - 7.5 in.

Provides guidance for foam divider installation for specific roof thicknesses.

Securing the Unit

Details the procedure and torque specifications for securing the rooftop unit.

Wiring the Unit to the Power Supply

Describes how to connect the unit's wiring to the power supply.

Connecting the Power Supply

Explains how to connect the 115 VAC power supply wire and electrical cords.

Finalizing the Installation

Covers the final steps to complete the ADB installation and initial checks.

Operation

Understanding the Controls

Explains the function of the temperature and fan control knobs.

Understanding the Settings

Describes how to use cooling and fan-only modes for optimal comfort.

Maintenance

Cleaning the Air Filter

Provides instructions for cleaning the air filter to ensure optimal performance.

Cleaning the ADB Housing

Details the correct method for cleaning the ADB housing and control panel.

Troubleshooting

Disposal

Limited Two-Year Warranty

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