Dust Free DFHPAUV User manual

DUST FREE®BYPASS HEPA /
BYPASS HEPA PLUS AIR CLEANER
BYPASS HEPA PLUS
Model: DFHPAUV Part #: 19851
BYPASS HEPA
Model: DFHPA Part #: 19850
218063-00 Rev. 1B 12/22
Installation & Operation Manual
INCLUDED INSIDE BOX
• Air cleaner
• Dual-tube UV Lamp (Bypass HEPA Plus
models only.)
• 5-ft C13 power cord
• 1:1 mounting template
• Installation and mounting hardware
• Installation instructions
GENERAL
This unit is designed to be installed into an
existing HVAC system for improved indoor
air quality.
BEFORE INSTALLING
• Read all instructions carefully. Failure
to do so could damage the equipment
or cause harm to yourself or others.
• Acknowledge all warnings.
• Only qualified technicians should
perform the installation.

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
Model
Unit Dimensions*
Round Collar Mount
Direct Plenum Mount
Electrical
Weight
Air Speed
UVGI
LISTINGS
HEPA Filter
PCO Filter
Pre/Carbon Filter
17”L x 13”W x 29”H
(432mm x 330mm x 737mm)
8” (203mm)
16” x 4” (406mm x 102mm)
120VAC, 60Hz, 1.9A. 120VAC, 60Hz, 1.6A.
36lbs (16kg)
400 CFM (680m3/hr)
Dual-tube UV-C lamp
Safety Listed to UL 705 and
CSA C22.2 #13.
UL 2998 zero-ozone validated.
Safety Listed to UL 705 and
CSA C22.2 #13.
12” x 16” x 2.5” HEPA (305mm x 406mm x 64mm)
15” x 5.325” x 0.625”
(381mm x 135mm x 16mm)
12” x 16” x 2” MERV 8 (305mm x 406mm x 51mm)
--
--
33lbs (15kg)
17”L x 13”W x 23.9”H
(432mm x 330mm x 607mm)
BYPASS HEPA PLUS BYPASS HEPA
SPECIFICATIONS
U.S. Patent Nos. 5,334,347, 5,817,276, 6,245,293, 6,267,924, 6,280,686,
6,313,470, 6,627,000, 6,539,727, 6,932,494, 6,550,257.
EPA Establishment No. 73316-TX-1
Visit http://www.dustfree.com/testing for a list of micro-organisms
inactivated by Dust Free® products.
The product and technologies described are not medical devices, and are not
intended to diagnose, treat, cure, or prevent any disease or illness.
Conforms to UL STD 705
Certified to
CSA STD C22.2#113
* See Appendix A for dimensional schematics. Specifications subject to change without notice.

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection.
NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.
OPERATION
SEQUENCE OF OPERATION
ACCESS
The unit has multi-stage filtration, a
ventilator, and a cabinet enclosure system. An access door is provided at the front
of the unit to permit access to the filters.
Opening the latch on the right side of the
unit will allow the door to swing open. A
safety door interlock switch cuts the power
to the motors for your safety. To remove the
door from the cabinet hinges, lift the door
with two hands.
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer.
1. Air passes through a reflection chamber
where germicidal UV light shines. (Bypass
HEPA Plus only.)
2. PCO (Photocatalytic Oxidation) filter.
(Bypass HEPA Plus only.)
3. The air then passes through a pleated
MERV 8 pre-filter that captures large
airborne particulates such as dust, pollen,
and mold.
4. Next, the air passes through an
impregnated carbon pad for odor control.
This pad helps traps airborne chemicals
produced from household cleaners,
paints, solvents, and VOCs. Carbon also
helps trap cooking and tobacco smoke.
5. In the last stage of treatment, smaller
particles then pass through a long-life,
99.97% HEPA media filter, capturing
particles of 0.3 microns (1/84,000 of an
inch).
Door Safety
Interlock
Fig. 1 Door safety interlock cuts power when access
door is opened.

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
INSTALLATION NOTES
• Return to return integrated with the forced
air heating/cooling system.
• Central draw points using dedicated duct
system
• Consult the manufacturer for other special
applications.
• UV-C lamp - 1year
• Pre/Carbon filter - 6-12 months
• HEPA filter - 1-3 years
• PCO filter - 2-3 years
• Verify clearance on the ductwork to
mount the unit using the Forced Air
heating/ cooling system. See Appendix A.
• Minimum clearance requirements for
maintenance and service. Allow at least
18” for filter removal.
• Interaction between the unit and other
mechanical devices.
• Prior to installing, serious consideration
must be taken to ensure this filtration
system will operate properly if integrated
to any other type of mechanical system,
i.e. a forced air system, or an air handling
unit. To insure proper operation &
compatibilities of both system, it is
required that you follow the instructions in
this manual.
• UV unit #19851 is designed to emit
powerful ultraviolet radiation. It is
dangerous to come in contact with or
look at the light from this unit. Always turn
the air cleaner OFF and UNPLUG the unit
before opening panels or the filter access
door.
• Do not obstruct or cover the air intake
or air outlet of the filtration system. An
approximate 4” opening will need to be
cut into the existing duct work to install
the device properly.
• Vertical or horizontal mounting is
permissible.
The unit is a versatile appliance with
multiple installation configurations. It is
recommended to take your time in planning
the installation.
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer. NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.
SUGGESTED MEDIA AND LAMP REPLACEMENT

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
INSTALLATION NOTES
• Do not obstruct or cover the air intake or
air outlet of the filtration system.
• Do not modify, repair or disassemble this
system. These tasks are to be performed
by authorized serviced personnel only.
Fire, electrical shock and/or bodily injury
may occur if these warnings are not
followed.
• To prevent injuries, do not operate
the filtration system while servicing or
maintaining. There is an impeller wheel
turning at a very high speed that must
fully stop rotating prior to accessing the
inside of the unit.
• Always assess the operation of the
filtration system on how it may interact
with vented combustion equipment (ie.
Gas Furnace, Oil Furnace, Combustion,
Appliances, etc.)
• This unit must be installed on the
return-air side of the system only. Do
not connect to supply side. Do not
install in a cooking area or connect
directly to any appliance.
• Before servicing or cleaning the unit,
always remove the power cord from the
AC wall outlet.
• To reduce the hazards of electric shock
or fire, do not perform any service to the
system other than those stated in the
operating manual instructions.
• To reduce the risk of electric shock, this
filtration system comes equipped with
a 3-prong plug-in. This plug will fit in a
polarized outlet only one way.
• Do not use filtration system for outdoor
application.
• Do not pull or twist power cord when
disconnecting it from the ventilation
system. Grasp the plug firmly, not the
cord.
• Do not modify the power plug in any
way; if modified, risk of electric shock fire
or even damage to the unit may occur.
• Do not use the filtration system for
removal of flammable fumes or gases.
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer. NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.
USE A DEDICATED 120VAC OUTLET ONLY TURN OFF ALL INTEGRAL DISCONNECTS
BEFORE SERVICING

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
RETURN AIR DIRECT PLENUM MOUNTING INSTALLATION
Installing directly onto the return air plenum
of the forced air heating/cooling system
is the designed installation method. This
install eliminates the need to duct the unit
to the plenum system externally. See fig.2.
Install the return side connections after
the last branch on the return air plenum
and minimum two linear ft distance from
the furnace. Supplied with the unit is a 5-ft
power cord. If there is not a 120VAC outlet,
there will need to be one installed.
Note: The unit does not replace the filter
from the forced air heating/cooling system.
Regular maintenance of this filter is
necessary to permit the proper operation of
the forced air heating/cooling system.
1. Find a location that satisfies both service
and maintenance requirements.
2. Tape template to return air plenum. Cut
opening with metal shears, predrill for
the securing screws and remove the
template.
3. Remove the door and filters and proceed
to cut the rectangle precut metal tabs
on the back of the unit and remove
insulation.
4. Before mounting to plenum or ductwork,
use included 1/2" gasket sealing tape to
line the 16" x 4" cut-outs on the back of
the unit.
5. Align the unit into place and then fasten
the mounting bracket to the return air
plenum.
6. Filters may be shipped in clear plastic
wrapping. If present, remove the
protective wrapping prior to turning the
system on. When installing the filters,
match the direction of filter flow to the
direction of air flow directed on the fan
housing.
7. Place the access door back on the unit.
Insert the power cord into the receptacle
on the unit and plug into the wall outlet.
Fig. 2 Return air installation diagram.
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer.
NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
COLLAR MOUNTING INSTALLATION
• Find a location that satisfies both service
and maintenance requirements.
• Cut two 8-inch opening with metal
shears.
• Remove the door and filters and proceed
to cut the round precut metal tabs on the
top and bottom of the unit and remove
the insulation.
• Align the unit into the desired location
and then fasten the mounting bracket.
• Run approved ductwork to the HEPA and
fasten the round collars.
• Filters may be shipped in clear plastic
wrapping. If present, remove the
protective wrapping prior to turning the
system on. When installing the filters,
match the direction of filter flow to the
direction of air flow directed on the fan
housing.
• Place the access door back on the unit.
Insert the power cord into the receptacle
on the unit and plug into the wall outlet.
Installing using the collar mounting
system in the return air plenum of the
forced air heating/cooling system is
another installation method. Use the two
field-provided, 8 inch round collars for
installation. See fig.3.
Install the return side connections after
the last branch on the return air plenum
and minimum two linear ft distance from
the furnace. Supplied with the unit is a 5-ft
power cord. If there is not a 120VAC outlet,
there will need to be one installed.
Note: The unit does not replace the filter
from the forced air heating/cooling system.
Regular maintenance of this filter is
necessary to permit the proper operation of
the forced air heating/cooling system.
Fig. 3 Remote mount installation diagram.
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer.
NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
UV LAMP INSTALLATION
DISPOSAL OF CORE/UV-C LAMP
To maximize the efficiency and life of
the UV-C lamp, clean each lamp before
installation. Use isopropyl alcohol and a
cotton cloth to wipe dust and fingerprints
from the lamp.
Attach lamp to the connector by inserting
the front of the lamp first, then snapping
the back of the lamp into place. See fig.4.
Dispose of your spent UV-C lamps at your
local recycling center. You may also send
your spent lamps in the same container
you received your replacement lamps to:
Dust Free® Reclamation
1112 Industrial Drive
Royse City, TX 75189
The lamp should be replaced annually,
even if it appears to be operating normally.
UV-C energy production diminishes over
time.
BYPASS HEPA PLUS ONLY LAMP REPLACEMENT (ANNUALLY)
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer.
NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.
Fig. 4 UV lamp installation.
1. Obtain the correct replacement lamp for
your model.
2. Disconnect power to the equipment.
Allow the lamp to cool 10 minutes before
touching.
3. Remove the four screws securing the
cover. See Fig. 5 on the following page.
4. Remove the old lamp and install a new
lamp, as described in the section above.
5. Reconnect power.
WARNING
Mercury Hazard. Do Not Break.
UV-C lamp contains a small amount of
Mercury. May cause redness or
irritation. Manage in accordance with
disposal laws. www.lamprecycle.org

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
PCO FILTER REPLACEMENT
BYPASS HEPA PLUS ONLY
WARNING
UV Light Hazard.
Can cause serious eye and skin
damage.
Do not look at UV-C light. Wear UV-C
eye and skin protection
WARNING
Electric Shock Hazard.
Can cause injury or death.
Electrical wiring of the unit to the
HVAC system should be done by a
licensed HVAC technician or
electrical installer.
NOTICE
Qualified Technicians Only.
This device is for residential
applications only and must be
installed in compliance with all
national and local electrical and
mechanical codes. Failure to do so
will void Dust Free® Warranty.
Fig. 5 Remove panel.
Fig. 6 Slide out PCO filter.
1. The PCO filter is behind a sheet metal
panel. Remove the top screws and
loosen the bottom screws to remove the
panel. See Fig. 5.
2. Slide the PCO filter out of the rack and
replace with the new filter. See Fig. 6.
3. Reattach the sheet metal panel.
REPLACEMENT PARTS
Part # Description
19731 HEPA Plus 1-Yr Kit (UV-C Lamp, Pre/
Carbon Filter, HEPA Filter)
19732 HEPA 1-Yr Kit (Pre/Carbon Filter and
HEPA Filter)
19730 Pre/ Carbon Filter, HEPA & HEPA Plus
19729 HEPA Filter, HEPA & HEPA Plus
19865 PCO Filter, HEPA Plus ONLY
19728 UV-C Lamp, HEPA Plus ONLY
19727 UV-C Lamp Ballast, HEPA Plus ONLY

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
Dust Free LP. warrants this Bypass HEPA / Bypass HEPA Plus air cleaner (product), for as long
as the purchaser owns the real property where the product is installed, to be free from defects in
materials and workmanship under normal use and service, for a period of ten (10) years from the
date of installation. This warranty does not cover UV-C lamps or filters.
In order to be eligible for service under the warranty the product MUST be registered online at
http://www.dustfree.com/warranty within 10 days from the date of installation.
This warranty does not cover cosmetic damage, damage due to acts of God, damage as a result of
handling or shipment, negligence, misuse, connection to improper voltage, improper maintenance,
or abuse. This warranty is void if defect(s) result from failure to have this unit installed by a qualified,
properly licensed, heating and air conditioning contractor in compliance with all local building and
construction codes.
Dust Free LP’s exclusive obligation under this warranty shall be to supply, without charge, a
replacement for any covered component of the product which is found to be defective within the
parameters defined herein. Dust Free LP reserves the right to replace or repair the defective part or
component.
DUST FREE LP SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING
ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY,
FROM ANY BREACH OF WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS
PRODUCT. (Some states do not allow the exclusion or limitation of incidental or consequential
damages, so this limitation may not apply to you.) THE WARRANTIES SET FORTH HEREIN
ARE EXCLUSIVE AND DUST FREE LP EXPRESSLY DISCLAIMS ALL OTHER WARRANTIES,
WHETHER WRITTEN OR ORAL, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO ANY
WARRANTIES OF MERCHANTABILITY, WORKMANSHIP, OR FITNESS FOR A PARTICULAR USE.
If the limited warranty is void due to failure to use a qualified contractor all disclaimers of implied
warranties shall be effective upon installation.
How to make a warranty claim or have questions answered:
Should you have a warranty claim or questions about the warranty policy, contact the distributor
or dealer from which you purchased the product. Proof of original purchase and proof of identity
that the original purchasing party is filing the claim is required in order to initiate a warranty claim.
Defective parts must be returned no later than thirty (30) days after the failure to the installing
contractor together with the model number, serial number, and date of installation. All service and
removal must be performed by a licensed HVAC contractor. You must pay shipping charges and all
other costs of warranty service. Warranty is only valid the United States and Canada.
THIS WARRANTY SHALL NOT OBLIGATE THE MANUFACTURER FOR ANY LABOR COSTS AND
SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY THE
INSTALLING CONTRACTOR AS CONTRASTED TO DEFECTS IN THE PRODUCT ITSELF.
NOTE: Do not return any products or parts to the factory without a factory issued Return
Authorization number issued by the Dust Free LP customer service department.
In the event you have any questions concerning the use and care of this product or this warranty
which have not been answered to your satisfaction by the distributor or dealer, please call or write
the factory.
Dust Free®
PO Box 519, 1112 Industrial Park Drive
Royse City, TX 75189
1-972-635-9564
www.dustfree.com
WARRANTY

DUST FREE®BYPASS HEPA / BYPASS HEPA PLUS INSTALLATION & OPERATION MANUAL
APPENDIX A
BYPASS HEPA DIMENSION DIAGRAMS*
BYPASS HEPA PLUS DIMENSION DIAGRAMS*
Front view.
Front view.
Side view.
Side view.
Back view.
Back view.
559
22
in
432
17
in
328
13
in
610
24
in
(FILTERS)
203
8
in
COLLAR
102
4
in
KNOCKOUT
406
16
in
KNOCKOUT
327
12.9
432
17
in
711
28
in
325
13
in
610
24
in
(FILTERS)
406
16
in
KNOCKOUT
102
4
in
KNOCKOUT
480
18.9
in
203
8
in
COLLAR
*Collar dimensions only refer to the size of the knockouts. Duct collar flanges are not
included with the system.