PHOTO-CATALYTIC AIR PURIFIER SYSTEMS
Models: DUO-11/24V, DUO-14/24V, PCUV-16UA
ITEMS INCLUDED IN KIT:
1-24Volt UV-Aire Ballast Assembly
1-Photo-Catalytic Duct Insert
1-UVC Germicidal Lamp
4-Sheet Metal Mounting Screws
1-Instruction Sheet
1-Duct Board Mounting Bracket
1-24V Transformer
2-Fork Terminals
2-Wire Nuts
The Duo 24V models produce germicidal UVC Band light rays, which sterilize and reduce airborne
microorganisms and reduce Volatile Organic Compounds (VOC’s) by a photocatalytic chemical reaction as
air passes through a heating or air conditioning system. It is installed in the main supply or return duct and
operates continuously to automatically purify the air in the home 24 hours a day.
This product is not sold as a medical device and is not for the purpose of diagnosis of any disease or
condition, nor for use in the mitigation, treatment, or prevention of any disease or condition.
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY
BEFORE PROCEEDING WITH THE INSTALLATION.
WARNING: For use with 24V ONLY! Do not exceed voltage rating. Severe damage to device and or re
could result. Verify proper voltage.
This product is not sold as a medical device and is not for the purpose of diagnosis of any disease or condition nor for
use in the mitigation, treatment, or prevention of any disease or condition.
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION.
This device MUST be installed by a quali ed agency in accordance with the manufacturer's installation instructions. The de nition of
a quali ed agency is: any individual, rm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the
precautions required, and has complied with all the requirements of the authority having jurisdiction.
Please retain these instructions after installation.
Installed By: Phone:
Installation Date:
www. eldcontrols.com
SAFETY CONSIDERATIONS
WARNING: Never expose eyes or skin to UVC light from any source.
• Looking directly at the UVC light may cause permanent eye damage or blindness.
• Never operate the UV-Aire Air Purifying System out of the plenum.
• Designed for a closed duct system. Do not mount near a supply or a return air opening.
• All duct openings in direct line of site of the UV light must be sealed with aluminum tape or equivalent
sealing methods.
WARNING: UV light will break down plastic materials not rated for UV exposure:
(Examples: wire insulation, ex duct, drain pans and humidi ers)
• The unit must be mounted at least 30" from the above stated type of materials.
• If it is necessary to mount the unit in direct line of site of these types of materials, they must be
shielded with aluminum foil, aluminum foil tape, or sheet metal.
WARNING: DO NOT mount this unit outdoors.
• This product is designed for indoor installation only (i.e. attics, crawl spaces, basements, etc.).
WARNING: Never touch broken lamp or internal contents of lamp. The lamp contains mercury.
• After opening the carton, unpack and inspect the unit and lamp for damage. Do not install this unit
if any damage is noticeable. If lamp is damaged, cracked or broken, do not touch lamp or other
contents in carton. Close carton and return to seller immediately.
• In case of accidental exposure to internal contents of lamp, wash hands and any other a ected
skin area with mild detergent. Remove a ected clothing immediately. If skin surface is pierced, seek
medical attention immediately.
NOTE: If you touch the glass of the lamp, you should wipe the glass clean with isopropyl alcohol and
a lint free wipe. If the lamp is not cleaned, the lm of hand oils causes a reduction in the light intensity.
WARNING: Before installing or servicing a humidi er, air lter, HVAC system, or this unit, etc., always turn all
power OFF and have unit unplugged. Electrical shock can cause personal injury or death. Never expose eyes
or skin to direct UVC light from any source.
WARNING: To prevent water damage or electric shock, do not mount unit under a humidi er.
WARNING: This product is designed for indoor installation only (i.e. attics, crawl spaces, basements,
etc.). For use on gas red, oil red, electric and split system heat pump forced air systems.* This
product is NOT designed to be mounted outside on gas red or heat pump packaged units.**
*Split system heat pumps are systems where the air handler and the air conditioning compressor are
separate units.
**Packaged units are systems where the air handler and the air conditioning compressor are built
together and are installed outside of the building.
GENERAL INFORMATION
The UV-Aire unit uses technology that is recommended by doctors who state that "ultraviolet radiation, properly
integrated with heating, ventilating, and air conditioning systems, shows the most promise as a widely applicable
means of air disinfection".
1
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
page 2
INSTALLATION:
1. Choose a location for the Duo unit, with the following considerations:
a. The Duo unit will reduce organic buildup on an HVAC cooling/
heating coil by illumination with UVC germicidal rays. Locate
the Duo such that the maximum surface area of the coil is
illuminated, while installing as close to the coil as possible
without damage to the coil.
CAUTION: Use care to avoid damage to the coil and any wiring or other components while installing the
Duo 24V unit.
b. The Duo 24V unit must be installed with its power cable within reach of the included 24V
transformer, or the 24V power cable must be extended by using minimal 18 gauge wiring suitable for the
installation, with maximum extension length of 20 feet. DO NOT connect to the HVAC system
transformer, as this may overload the HVAC transformer and/or under-power the Duo 24V
unit, which may cause damage and will void the factory warranty. The included transformer is i
intended to be mounted on a 4x4 junction/conduit box or within an approved electrical enclosure. The
provided 24V transformer shall be connected to 115 or 230 VAC power.
c. The Duo 24V unit may be installed on either the supply or return plenum.
d. The Duo 24V unit may be installed in up ow, down ow, or horizontal ow ducts and plenums.
e. The Duo 24V unit may be installed directly onto a sheet metal air duct or plenum, or onto
berglass ductboard when installed using the included Ductboard Adapter Plate (see Figure 1).
2. Install the Duo 24V unit:
a. Hold or temporarily tape the included Ductboard Adapter Plate in the location chosen for
installation, and using the plate as a template, mark the mounting surface using the outermost
slots in the plate (see Figure 1). Alternatively, a 5-3/8” square may be marked on the mounting
surface.
b. Cut out the opening for the Duo unit in the mounting
surface, making sure to cut slightly outside the marked
lines if the Ductboard Adapter Plate was used as a template.
c. If mounting the Duo unit on ductboard: attach the Ductboard
Adapter Plate to the opening by folding the inner aps of the
plate into the opening and fully back against the inside of the
opening in the ductboard, either from the sides or from top
and bottom of the plate. Finish the Plate Adapter installation
by sealing around the edges of the plate to the ductboard,
using mastic foil tape or other material suitable for sealing
duct joints.
d. If the direction of air ow in the duct is downward, the white
plastic ballast base that is attached to the Duo unit may
Figure 1
optionally be rotated 180 degrees from the position shown, so
the ballast label will not be upside down. If desired, remove the four screws attaching the base
to the Duo unit and re-install the base to the unit. Note: The white plastic base has a round sight
glass hole for observing the lamp inside the duct (the sight glass may be seen above the center
hole in the mounting base in Figure 2). There is a pair of holes in the Duo mounting ange that
allow the sight glass in the base to align with, in either position.glass may be seen above the
center hole in the mounting base in Figure 2). There is a pair of holes in the Duo mounting ange
that allow the sight glass in the base to align with it, in either position.
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
page 3
e. Insert the Duo unit into the duct opening and attach it to the duct (or Ductboard Adapter
Plate) with the four included sheet metal screws. The wider end of the V-shape of the Duo
unit should face into the oncoming airstream. Note: The white plastic base has a round sight
glass hole for observing the lamp inside the duct (the sight glass may be seen above the center
hole in the mounting base in Figure 2). In Figure 2, the unit is installed properly for a
downward air ow direction (note that the round sight glass hole will be upstream of the
ballast when properly installed).
f. Insert the UVC lamp pins into the ballast socket (see Figure 3). Note: the lamp has one
long pin that must be aligned with the recessed terminal in the ballast socket. D o NOT directly
touch the bulb lamp glass section with bare hands. Wear oil-free, cotton type gloves when han
dling germicidal glass bulb.
Figure 2
Figure 3
g. Carefully insert the lamp through the center of the white plastic mounting base, align the
ballast with the power cord pointing 90 degrees to the right of the round sight glass, and
engage the ballast onto the base by rotating the ballast ¼ turn to the right (see gures 4
and 5). Note: the safety switch actuating nger that projects from the mounting base
must engage into the slot in the inside of the ballast. The slot is visible above the ballast
socket in Figure 3.
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
Figure 4
Figure 5
page 4
3. Ensure that power has been disconnected to the circuit that will provide power to the 24V
transformer, and install the transformer as directed in the installation instructions included with the
transformer.
WARNING: MAKE SURE POWER IS DISCONNECTED TO THE CIRCUIT TO BE USED TO PROVIDE POWER
TO THE DUO 24V UNIT!
4. Connect the ballast power cord to the 24V transformer terminals, using the included crimp-on fork
terminals.
5. Restore power to the circuit providing power to the 24V transformer.
6. Look through the round sight glass hole in the mounting base to verify that the UV-C lamp is lit. The
lamp should have a blue glow along its length. If the lamp is not lit, carefully rotate the ballast ¼
turn to the left, partially remove it from the base, and re-install with the safety switch nger
engaging with the slot in the ballast as directed in Step 2f.
MAINTENANCE
WARNING: Disconnect power to the transformer before commencing inspection and cleaning.
NOTE: Wear disposable, non-absorbent protective gloves prior to inspection procedure in case of accidental
breakage of glass.
1. We recommend inspecting and cleaning the lamp at least every 6 months. Frequency depends upon the
environment. Such as: the type of air lter, duration of use and replacement cycle.
2. To maintain maximum output intensity, replace the UV-Aire lamp annually. The lamp should operate
continuously for maximum lamp life and light e ectiveness.
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
page 5
REPLACEMENT PROCEDURE
WARNING: Disconnect power to the transfomer before starting replacement
procedure.
NOTE: Wear disposable, non-absorbent protective gloves prior to
replacement
procedure in case of accidental breakage of glass.
1. Rotate the UV-Aire ballast assembly counter-clockwise until it stops.
(See Figure 6)
2. Remove the ballast assembly and lamp from the mounting base. (See
Figure 7)
3. Remove the lamp from the lamp socket.
4. Install the replacement lamp into lamp socket. Do not handle the lamp
with bare hands. Oils on the hands tend to reduce lamp intensity.
5. Wipe o the glass with the supplied alcohol wipe.
6. Position the ballast assembly power cord 90° to the viewport hole on the
mounting base. (See Figure 6)
7. Slide the lamp through the hole in the mounting base.
8. Press the ballast against the mounting base. Rotate the ballast assembly
clockwise until it stops and is locked in place. (See Figure 8)
9. After assembly is rmly in place, reconnect power to transformer. Check lamp
operation by looking through the viewport hole. A blue glow should be seen in the
duct.
10. After replacing the lamp, make sure to install the Lamp Replacement Label. Print the
date on the label and apply to the side of ballast assembly.
Figure 6 (Removal)
Figure 7
NOTE: If blue light leaks through any portion of plenum and/or around mounting plate,
unplug power supply cord immediately and seal a ected areas and/or rotate ballast
and repeat step #8.
Figure 8 (Installed)
11. UV lamps contain a small amount of mercury, like a typical uorescent lamp. Check with your local waste
management authority for local disposal or recyclingrequirements. According to the EPA's Universal Waste
Rule, these types of lamps may be disposed of into household waste.
WARNING: Never touch broken lamp or internal contents of lamp. The lamp contains mercury.
NOTE: In case of accidental exposure to internal contents of lamp, wash hands and any other a ected skin area
with mild detergent. Remove a ected clothing immediately. If skin surface is pierced, seek medical attention
immediately.
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
page 6
TROUBLESHOOTING GUIDE
1. Do not wire the unit into the appliance 24 volt fan or thermostat circuit. This will cause premature ballast
or lamp failure and void the warranty. For proper operation, the unit requires 24VAC at all times.
2. Check to make sure 24VAC power is available at the transformer.
3. If lamp does not light up, pull back metal washer on mounting base. If lamp comes on, the base needs
tightening to ensure that the safety switch is fully engaged.
4. If lamp does not light up, remove the ballast from the base and re-install it onto the base, ensuring that the
nger projecting from the base engages into the safety switch slot in the ballast. Repeat step 3.
5. If lamp does not light up after performing Steps 3 and 4, replace lamp.
6. If unit still does not light up after replacing lamp, replace unit.
REPLACEMENT PARTS LIST
LAMP Replacement Part Number
46649301 11” Lamp Assy Duo
46649302 14” Lamp Assy Duo
46511200 16” Lamp Assy
For replacement parts, contact Field Controls at:
Phone: 252-522-3031 • Fax: 252-522-0214
Email: sales@ eldcontrols.com
CLEAN-UP OF BROKEN LAMPS (see warnings on page two of this manual)
UV lamps contain a small amount of mercury, like a typical uorescent lamp. DO NOT touch any of the
mercury with your bare hands.
1. While wearing disposable, non-absorbent protective gloves, carefully pick up the large pieces of glass
with your hands.
2. Vacuum the entire area with a standard household vacuum cleaner ensuring the removal of all
lamp material.
3. Dispose of the pieces of glass, the vacuum cleaner bag, and the disposable gloves in a sealed
garbage bag.
4. Check with your local waste management authority for local disposal or recycling requirements.
According to the EPA's Universal Waste Rule, these types of lamps may be disposed of into
household waste.
5. Wash hands, and remove and wash clothes for added safety measures.
1
Richard Riley, M.D. “Airborne Infection: The American Journal of Medicine, September 1974, Vol. 57 - 5/16/01
2
The health aspects associated with the use of these products and their ability to aid in disinfecting of environmental air have not been
investigated by UL.
WARNING: Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire™ Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
page 7
Warranty
For warranty information about this or any Field Controls product, visit:
www. eldcontrols.com/warranty
The health aspects associated with the use of these products and their ability to aid in disinfecting of environmental air
have not been investigated by UL.
© Field Controls, LLC P/N 46648100 06/15
Phone: 252.522.3031 • Fax: 252.522.0214
www.fieldcontrols.com
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