Dometic Breathe Easy - User Manual

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L-3221 Rev 20170504 - P/N 336565
14
Breathe Easy Air Purifier 
In-Duct Model 
(white ballast)
Installation & Operation Manual
H
OW IT WORKS
The Dometic In-Duct Breathe Easy Air Purifier uses your marine air 
conditioning system’s blower to move air through the unit where 
ultraviolet (UV) light and innovative Photocatalytic Nano-Mesh 
technology improve air quality.
The unit uses a specific frequency of UV light that enables maximum 
effectiveness in reducing pollutants such as pollen, mold spores, 
bacteria, viruses, fumes, and odors, yet it produces no harmful ozone.
UV energy activates the titanium-dioxide catalyst on the surface of the 
nano-mesh structure. The molecules of pollutants that come in contact 
with the catalyst are reconfigured into nontoxic elements. 
The density and quantity of pollutants present affect how rapidly the air will be cleaned. As air re-circulates and makes multiple passes through the 
system you will notice continuously improving purification levels.
NOTE: The air purifier does not fix the source of ongoing odor problems. For example, a leak that caused mold must be repaired and the mold 
must be removed.
SAFETY PRECAUTIONS
SYSTEM SETUP
Selecting the Location
• This unit is designed for installation within the supply-air ducting of an air conditioning system positioned downstream of the blower.
• If there is a T-box or other diverter box attached to the blower, position the unit in line with the side that gets the most air. Or, relocate the 
diverter box away from the blower and place the Breathe Easy between the blower and the diverter. If the unit is installed downstream of 
a diverter box, be sure the diameter of the Breathe Easy matches the diameter of the outgoing duct. (For example, a diverter box could 
have 6” ducting going in, then have 2”, 4”, and 5” branches going out, so you would need a 5”-diameter unit instead of a 6”-diameter unit 
to place it on the outgoing branch that gets the most air.)
• Make sure the ducting that connects to the air purifier is UV-stable. If you can not confirm that it is, replace the ducting in the area 
stretching at least 3 feet (1m) before and 3 feet (1m) after the unit with UV-stable ducting to prevent eventual deterioration of the ducting. 
Deteriorated ducting may create air leaks that could cause secondary condensation.
• The ducting should service an indoor area.
• The unit requires annual replacement of the UV bulb, so situate the unit for easy access to both the bulb housing and the bulb ballast.
• The unit requires electricity and operates on 120V/60Hz, 220V/50Hz, or 230V/60Hz AC power. The unit is configured for 230V/50Hz or 
60Hz as a default. If it is to be used for 120V/60Hz the switch on the ballast must be switched to the left to the 120V/60Hz 
position. See “Power” for electrical specifications.
• Do not install in areas that may be exposed to flammable gas.
WARNING
• Do not use outdoors.
• Keep the cord away from heated surfaces.
• Never open the cover without turning off the main breaker.
• Never operate this unit if it has a damaged cord or plug.
• Never operate this unit if it has been damaged or submerged in water.
• Do not place in an area where uncured siliconized sealers are being used, as the vapors will inhibit the unit’s photocatalytic 
capability.
DANGER
• Never look directly at a lit ultraviolet (UV) bulb. The direct power of the UV bulb can be harmful to the eyes. However, 
looking at the indirect blue glow from the bulb is safe.
• This equipment is not ignition protected per CFR 183.410 and may not be installed in areas that may be exposed to 
flammable gas.
CLEANING
Nano-Mesh Structure
Normally the nano-mesh structure of the Breathe Easy Air Purifier is self cleaning and needs no maintenance. In rare instances, however, if debris 
accumulates and air purification decreases you may need to clean it. Make sure power is disconnected before opening the tube. (See 
“Replacing the UV Bulb” for opening and closing instructions.) Blow away debris with canned air suitable for use on computers. 
UV Bulb
Air purification effectiveness will decrease if the UV bulb is dirty, and under extreme conditions you may need to clean it. Make sure power is 
disconnected before opening the tube. (See “Replacing the UV Bulb” for opening and closing instructions.) Gently clean the bulb using rubbing 
alcohol on a soft cloth. 
TROUBLESHOOTING
No power, unit does not turn on (no blue glow).
1. Make sure the unit is wired to the breaker of the air conditioning system’s incoming terminal strip and the breaker is on.
2. Verify that the power source is working.
3. UV bulb is not seated correctly in the socket (see “Replacing the UV Bulb”).
4. UV bulb needs to be replaced (see “Replacing the UV Bulb”).
5. Blue light on the ballast is not lit (see “Replacing the UV Bulb”).
6. Replace ballast if you have a known good bulb and power is on to ballast (confirmed with a volt meter at power terminals).
7. The unit is configured for 230V/50Hz or 60Hz as a default. If it is to be used for 120V/60Hz the switch on the ballast must be 
switched to the left to the 120V/60Hz position.
Output seems ineffective.
1. Make sure unit is servicing an enclosed area.
2. Remove any obstructions in the air stream’s input and output vents.
3. Clean the air filter of the air conditioning system.
4. Is it time for a new bulb? The UV bulb should be replaced each year (see “Replacing the UV Bulb”).
5. Replace bulb if it is gowing red, not blue (see “Replacing the UV Bulb”).
6. Clean the Nano-Mesh structure (see “Cleaning”).
7. Clean the UV bulb (see “Cleaning”).
REPLACEMENT PARTS
Replacement parts can be ordered from any Dometic dealer. To find a dealer near you, go to: www.dometicusa.com 
WARRANTY
The In-Duct Dometic Breathe Easy Air Purifier is covered by a limited warranty against defective material for 1 year from date of purchase. This 
warranty covers electronic parts only and does not include the UV bulb. The original product sales receipt is required as proof of purchase.
This warranty does not apply if a unit has been dropped, damaged, or submerged in water.
To file a warranty claim, contact a Dometic dealer. To find a dealer near you, go to: www.dometicusa.com
B
REATHE EASY AIR PURIFIER 
TUBE  DIAMETER
UV BULB REPLACEMENT
PART NUMBER
REPLACEMENT PART
DESCRIPTION
4”, 5”, or 6” diameter 4210800 UV Bulb, 5-inch
7”, 8”, or 10” diameter 4210802 UV Bulb, 8-inch
COPYRIGHT © 2009-2013 Dometic Corporation. All Rights Reserved.
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photo-
copying, recording or otherwise without prior written consent by Dometic Corporation. Every precaution has been taken in the preparation of this manual to ensure 
its accuracy. However, Dometic Corporation assumes no responsibility for errors and omission. Neither is any liability assumed for damages resulting from the use 
of this product and information contained herein.

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

The Dometic Breathe Easy Air Purifier (In-Duct Model with white ballast) is designed to improve air quality in marine air conditioning systems. It utilizes a combination of ultraviolet (UV) light and Photocatalytic Nano-Mesh technology to reduce airborne pollutants.

Function Description:

The air purifier works by drawing air from the marine air conditioning system's blower through its internal components. Inside the unit, a specific frequency of UV light targets and reduces pollutants such as pollen, mold spores, bacteria, viruses, fumes, and odors. This UV light is designed to be highly effective without producing harmful ozone. Simultaneously, the UV energy activates a titanium-dioxide catalyst on the surface of the nano-mesh structure. When pollutant molecules come into contact with this catalyst, they are reconfigured into nontoxic elements. The system continuously purifies the air as it recirculates through the unit multiple times, leading to progressively improving air quality. It's important to note that the air purifier addresses ongoing odor problems by treating the air, but it does not fix the source of such problems (e.g., a mold-causing leak would still need to be repaired and the mold removed).

Important Technical Specifications:

The unit operates on AC power, with configurations for 120V/60Hz, 220V/50Hz, or 230V/60Hz. It is configured for 230V/50Hz or 60Hz as a default, but a switch on the ballast allows it to be set to 120V/60Hz. Electrical specifications vary slightly based on the tube diameter:

4", 5", or 6" In-Duct Models:
- Volts/Hz/mA: 115/60/200, 220/50/350, 230/60/200
- UV Bulb Watts: 12
7", 8", or 10" In-Duct Models:
- Volts/Hz/mA: 115/60/250, 220/50/350, 230/60/225
- UV Bulb Watts: 20

The UV bulb is available in two sizes: 5-inch (part number 4210800) for 4", 5", or 6" diameter tubes, and 8-inch (part number 4210802) for 7", 8", or 10" diameter tubes.

Usage Features:

Installation: The unit is designed for installation within the supply-air ducting of an air conditioning system, positioned downstream of the blower. If there's a T-box or diverter box, it should be placed in line with the side receiving the most airflow, or between the blower and the diverter. The ducting connecting to the air purifier must be UV-stable, and if not, it should be replaced with UV-stable ducting for at least 3 feet (1m) before and after the unit to prevent deterioration and potential air leaks. The unit should be situated for easy access for annual bulb replacement.
Power Connection: The unit connects to the incoming AC power of the air conditioning system. It is crucial NOT to wire the unit to blower power, as this can significantly reduce the UV bulb's life and damage the ballast.
Operation Indicator: When power is supplied, and the bulb is lit, a blue pilot light on the ballast will illuminate, indicating that the unit is in operational ready mode. A blue glow from the unit also confirms operation.
Safety Precautions: The device should not be used outdoors. The cord must be kept away from heated surfaces. The cover should never be opened without turning off the main breaker. The unit should not be operated if it has a damaged cord, plug, or if it has been damaged or submerged in water. It should not be placed in areas where uncured siliconized sealers are being used, as vapors can inhibit its photocatalytic capability. Users should never look directly at a lit UV bulb, as direct exposure can be harmful to the eyes; however, looking at the indirect blue glow is safe. This equipment is not ignition protected per CFR 183.410 and may not be installed in areas exposed to flammable gas.

Maintenance Features:

UV Bulb Replacement: UV bulbs have a limited lifespan and lose germicidal effectiveness after approximately one year (about 9,000 hours) of continuous use, even if they still glow. Replacement with a new Dometic UV bulb is required annually. The bulb will still glow blue after 9,000 hours but will not be strong enough to be functional. If the bulb glows red or orange instead of a bright purple-blue, it needs immediate replacement. To replace the bulb, power must be disconnected, the bulb allowed to cool, and the bulb housing opened. The old bulb is then twisted out of its clips and unplugged, and a new Dometic UV bulb is inserted, ensuring a 3/16-inch (5mm) gap between the bulb and the housing. The power-cord strain relief and bulb housing must be correctly seated to prevent air leaks.
Nano-Mesh Structure Cleaning: The nano-mesh structure is normally self-cleaning. However, if debris accumulates and air purification decreases, it may need cleaning. Power must be disconnected before opening the tube, and debris can be blown away with canned air suitable for use on computers. A slight twist in the nano-mesh structure is normal and creates a vortex for better air purification, so it should not be straightened.
UV Bulb Cleaning: If the UV bulb is dirty, its effectiveness will decrease. Power must be disconnected before opening the tube, and the bulb can be gently cleaned with rubbing alcohol on a soft cloth.
Troubleshooting: The manual provides guidance for common issues such as no power (unit does not turn on, no blue glow) and ineffective output. Solutions include checking wiring, power source, bulb seating, bulb replacement, ballast status, and ensuring the correct voltage configuration (120V/60Hz or 230V/50Hz/60Hz). For ineffective output, solutions include ensuring the unit services an enclosed area, removing obstructions, cleaning the air filter, and replacing/cleaning the UV bulb and nano-mesh structure.
Replacement Parts: Replacement parts, including UV bulbs, can be ordered from any Dometic dealer.
Warranty: The In-Duct Dometic Breathe Easy Air Purifier is covered by a limited warranty against defective material for 1 year from the date of purchase. This warranty covers electronic parts only and specifically excludes the UV bulb. The original product sales receipt is required as proof of purchase. The warranty does not apply if the unit has been dropped, damaged, or submerged in water. To file a warranty claim, contact a Dometic dealer.

Dometic Breathe Easy Specifications

General

Brand	Dometic
Model	Breathe Easy
Category	Air Cleaner
Language	English

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