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AIR CLEANERS / FILTERS
Litho U.S.A.
505,276M
7/2014
Supersedes 2/2012
PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
INSTALLATION INSTRUCTIONS FOR PUREAIR AIR PURIFICATION SYSTEM
MODELS PCO14-23, PCO16-28 AND PCO20-28
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Shipping & Packing List
Assembled PureAir air purification system which
includes:
1 - Cabinet
1 - Control box assembly (includes frame, ballasts
and associated wiring)
1 - MERV 16 pleated filter
2 - UVA lamps (taped to the cabinet and the insert foil
packaging)
1 - Titanium dioxide PureAir Insert
1 - Power cord (120VAC)*
*230VAC power cord available separately (part number
91X44).
A warranty certificate and registration card are also
included.
Shipping Damage
PUREAIR AIR PURIFICATION SYSTEM
NOTICE
This system is NOT intended to be used for removal
of active mold growth or continuous sources of
high levels of chemicals in the air.
For existing mold growth, the mold must be proper
ly removed PRIOR to installation of the PureAir air
purification system.
WARNING
Risk of property damage, injury, or death.
Installation and service must be performed by a
qualified installer or service agency.
WARNING
Electric shock hazard.
Can cause injury or death.
Disconnect all electrical power supplies before ser
vicing. Access panels must be in place during ap
pliance operation.
Check equipment for shipping damage. If damage is
found, immediately contact last carrier.
General Information
The PureAir air purification system uses photocatalytic
oxidation (PCO) technology to significantly reduce levels
of airborne volatile organic compounds, cooking odors,
common household odors, airborne dust particles, mold
spores and pollen. The PureAir system is available in
three models: PCO14-23, PCO16-28 and PCO20-28.
Each unit may be connected to either 120VAC or 230VAC
power supply. If 230VAC power supply is used, a 230VAC
power cord must be ordered separately.
Lab tests confirm a 50% reduction in total volatile organic
compounds (TVOC) within the first 24 hours of initial
operation of the PureAir air purification system. It may
take up to 48 hours after initial system start-up to reduce
the airborne chemicals that have built up in a home over a
long period of time.
For peak performance, unit should be installed in homes
with TVOC levels that are less than 1000 micro-gram /
cubic meter. Home source removal and ventilation may be
required to lower TVOCs to this level.
CAUTION
Sharp edges hazard.
Sharp edges can cause injuries.
Use protective gloves when grasping equipment
edges.
NOTICE
Possible odor emissions. Chemical reactions may
cause temporary odors after initial start-up or after
lamp replacement. Odor may also be present after
paint, cleaning solutions or hobby materials have
been used in the conditioned space.
Some occupants may experience irritation or dis
comfort during this period. If the irritation or dis
comfort lasts longer than 48 hours, the homeowner
should be advised to contact a Lennox dealer.
Unique Field-Supplied Installation Items
Cotton gloves and cloth (to remove finger prints from
lamps)
Aluminum foil tape or water-based mastic (NOT
silicone) to be applied as a sealant.
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Page 2
Parts Identification
Electrical
Socket
Access Door
Ballast
Control Box
Assembly
MER V 16 Filter
Lamp
Securing
Clip
Installation Examples
turns, install turn
ing vanes before
Upflow
Box Cover
Note - At sharp
the PCO.
UVA Lamps
(Not Installed)
Surge Protector
Lamp Socket
Figure 1. PCO Parts Identification
Upflow
(Side Installation)
(Side installation with PCO access panel pointed upward
and lamps suspended vertically -- NOT RECOMMENDED)
Contact the Technical Support Department at
PureAir™ Insert
Cabinet
Reflectors
Upflow
1.800.953.6669 for additional information.
The PCO must not be installed in
a confined space where service
clearance would be restricted.
Downflow
Horizontal
Figure 2. Installation Examples
Page 2
Typical Transition
A metal transition should be used. The transi
tion must be planned for each job. Reduction
should not be more than 4 inches per linear
foot, approximately 20 angular degrees.
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Dimensions and Specifications
10
(254)
B
Figure 3. Dimensions and Specifications
WEIGHT
PCO14-23 34 lbs.
PCO16-28 36 lbs.
PCO20-28 39 lbs.
ELECTRICAL
PCO14-23
PCO16-28
PCO20-28
POWER CONSUMPTION
120VAC 144 Watts Nominal
230VAC 150 Watts Nominal
OPERATING ENVIRONMENT
0°F to 140°F outside of duct.
10 to 60 percent relative humidity.
(Optimal performance at 50 percent relative humidity)
PLEATED FILTER EFFICIENCY
Minimum Efficiency Rating Value (MERV) 16.
LISTINGS
ETL safety listing report 3061144A. Conforms to UL STD
1598. Certified to CSA STD C22.2 no. 250.0.
120V, 50/60 Hz,
1.2 Amps -- Maximum,
230 V, 50/60 Hz,
0.65 Amps -- Maximum
A
Model A B
PCO14-23 23 (584) 21-1/8 (537)
PCO16-28
PCO20-28 28-1/2 (724) 21-1/8 (537)
28-1/2 (724) 16-1/2 (419)
Installation
Select a Location
The PCO must be installed in the return air duct upstream
of the supply blower. Allow a 30-inch service clearance in
front of the access door as shown in figure 4. The control
box, pleated filter and PureAir Insert must be removable.
Allow Approximately
30” of Clearance
Approximate Air Flow Resistance (Cabinet and Filter)
Capacity
(Tons)
2 800 0.12 0.11 0.09
2.5 1000 0.17 0.15 0.12
3 1200 0.22 0.20 0.16
3.5 1400 0.28 0.25 0.19
4 1600 * 0.30 0.23
4.5 1800 * * 0.28
5 2000 * * 0.32
*Not recommended. Excessive system pressure drop can
damage HVAC system and reduce performance.
Flow
Rate
(CFM)
Pressure Drop (in. w.g.)
PCO14-23 PCO16-28 PCO20-28
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Figure 4. Service Clearance
NOTICE
The PCO should be installed so that the lamps will
be in the horizontal position.
If the PCO must be installed with the access panel
pointing upward and the lamps suspended vertical
ly from the sockets, retaining clips are required to
lock the lamps in the sockets. Contact the Technical
Support Department at 1-800-953-6669 for addition
al information.
PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
PUREAIR AIR PURIFICATION SYSTEM
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NOTICE
This appliance is intended for return air duct instal
lation only.
Improper installation may damage PureAir sys
tem, HVAC system, or other equipment and may also
void warranty.
Remove Protective Wrapping
The PureAir Insert is shipped in a protective vacuum
packaging. Packaging must be removed prior to
installation. Take care to prevent damage to PureAir™
Insert when removing packaging.
NOTICE
Unpacking required.
Remove all protective packing material from the
UVA lamps (taped to the cabinet and the insert foil
packaging) and the titanium dioxide PureAir In
sert.
Packing material should be disposed of properly.
Use cotton gloves or a cotton cloth to protect the lamps and
your hands during unpacking and installation. Install lamps
as follows:
1. Locate the two lamp boxes taped to the cabinet and
insert foil packaging.
2. Remove strapping tape form cabinet and insert
packaging to allow the removal of the lamp boxes.
3. Set lamp boxes aside while preparing PCO cabinet for
lamp installation.
4. Remove the PCO access door.
5. Slide out the control box assembly.
6. Remove one replacement lamp from the box. Position
the lamp with the pin end closest to the lamp socket.
While engaging the pins in the socket, pivot the lamp
so that the securing clip on the reflector locks into the
open space in the middle of the lamp. See figure 5.
7. Gently pull on lamp to ensure that lamp securing clip
is engaged.
Lamp
Securing
Clip
Pins
Lamp Socket Lamp
Slide lamp pins into lamp socket and pivot
lamp inward onto lamp securing clip.
Reflector
Figure 5. Lamp Installation (Top View)
CAUTION
Lamps contain mercury.
Ingestion of or contact with mercury or mercury va
por is hazardous to your health.
Take care when handling lamps. If lamp is broken,
avoid contact with mercury.
Installing PCO Cabinet
The PCO cabinet may either be installed on a level
installation deck or platform adjacent to the air handler or it
may be suspended from the rafters using metal strapping.
If straps are used, take care when attaching straps to the
PCO cabinet. Ensure fasteners do not interfere with
internal components of the PCO cabinet. Filter, PureAir
Insert and control box must be able to slide freely into the
cabinet.
1. Oil on metal surfaces may cause odors. Use mild soap
and water solution to wash all new duct and transition
surfaces.
2. Use the air flow directional label on the inside of the
PCO cabinet to orient the PCO unit. Properly position
the PCO cabinet next to the return air opening of the
air handling unit. Use sheet metal screws (1”
maximum length), rivets or other appropriate
fasteners to secure PCO cabinet to the return air side
of the air handling unit.
3. Use sheet metal screws (1” maximum length) to fasten
the return air duct to the other side of the PCO cabinet.
4. Use aluminum foil tape or water-based mastic to seal
all joints between the PCO cabinet, air handler and
duct.
5. In high humidity applications, wrap PCO cabinet with
2” foil-faced insulation (foil on the outside) to prevent
condensation.
8. Repeat steps 6 and 7 to install second lamp.
9. Slide vacuum packaged PureAir Insert out of
cabinet. Carefully remove insert from packaging.
10. Keep PureAir Insert and filter in a safe place to
ensure these components remain clean until the
cabinet installation is completed.
NOTICE
Oil on metal ducts may cause odors.
Use a mild soap and water solution to remove oils
from transitions and duct surfaces prior to installa
tion.
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NOTICE
Do not use any form of silicone sealant.
Use of silicone-based products will reduce the ef
fectiveness of or damage the titanium dioxide coat
ings on the PureAir™ Insert.
NOTICE
Route power cord away from traffic areas where the
cord may become a safety hazard.
Installing Filter and PureAir Insert
Use the following procedure to install both filter and
PureAir Insert (see figure 6).
1. Slide the pleated filter into the rails on the air inlet side
of the PCO cabinet. Verify proper air flow direction.
2. Slide the PureAir Insert into rails on the air outlet
side of the PCO cabinet. Slide the control box
assembly back into the cabinet.
3. Securely fasten the access door.
4. Plug one end of the provided power cord into the
receptacle on the PCO cabinet and the other end into
a power receptacle.
5. Look through the view port in the access door to check
that the lamps are illuminated.
MERV 16
Filter
Air
Handler
PureAir™ Insert
Access
Door
Slide PureAir™ Insert, MERV 16 filter and control box
assembly into cabinet. Securely fasten access door.
Control Box
Assembly
Figure 6. Installing Filter and PureAir Insert
Wiring
The PCO shall be wired in accordance with national and
local codes.
NOTICE
UVA lamp life is shortened when lamps are turned
off and on. Power to PCO unit must remain on at all
times.
Do not interlock lamp operation with air handler
blower operation.
NOTE - On initial start-up, the lamps may not reach full
illumination for several minutes.
CAUTION
Ultraviolet (UVA) radiation risk.
Prolonged exposure may cause skin or eye damage.
Avoid prolonged (weeks) exposure to skin or eyes.
NOTICE
MERV 16 filters cannot tolerate direct exposure to
UVA light.
Filters are protected by factory-installed reflectors.
Figure 7. Wiring Schematic
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PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
PUREAIR AIR PURIFICATION SYSTEM
Page 6
Operation
1. Check to ensure that access door is securely in place.
WARNING
Risk of carbon monoxide poisoning.
Can cause injury or death.
Do not operate system unless access door is in
place and properly secured. Operation of this equip
ment without the PCO access door in place may
cause exhaust fumes to be drawn into occupied
spaces.
1. Unpack the replacement MERV 16 filter, UVA lamps
and PureAir Insert which are provided in the
Replacement Kit. Remove all protective wrapping
materials.
2. Unplug the power cord and remove the PCO access
door.
3. Slide out the control box assembly and remove the
existing MERV 16 filter.
4. Check air flow direction of the MERV 16 filter and
insert replacement filter into the PCO cabinet.
5. Remove the existing PureAir Insert from the
cabinet.
2. Lamps should remain illuminated continuously except
during service and maintenance.
3. For optimal odor control, air handler blower should
remain on continuously (thermostat fan setting in ON
position, rather than AUTO).
If air handler does not provide a continuous low blower
speed option, an additional blower relay should be
installed. Use Lennox part number 45H03. Phone Lennox
Application Department at 1-800-453-6669 for wiring
information. Lennox units which include the SureLight
integrated control do not require the use of an additional
relay.
NOTE - Continuous fan operation may result in higher
humidity. If humidity levels are uncomfortably high, fan
setting should be switched to AUTO during cooling
operation.
Filter, Insert and Lamp Replacement
The PCO MERV 16 filter, PureAir Insert and UVA lamps
require annual replacement. More frequent replacement
may be required in applications with heavier dust or dirt
loads or if you notice a reduction in odor-removal
efficiency. An annual maintenance kit, which includes a
replacement MERV 16 filter, a replacement PureAir
Insert and two replacement UVA lamps, is available
through Lennox . See “Annual Maintenance Kit” (Page 7)
for applicable kit part number.
NOTICE
Do not wash PureAir™ Insert. Soap and water will
destroy the titanium dioxide catalyst that coats the
insert surface.
6. Check air flow direction of the replacement PureAir
Insert and slide the PureAir Insert into the cabinet.
7. Wipe down reflectors using cotton cloth to remove
finger prints and contaminants.
®
8. Pivot the lamp away from the reflector until lamp is
released from the securing clip. Gently pull lamp out
of the lamp socket taking care not to break the lamp.
9. Remove one replacement lamp from the box. Position
the lamp with the pin end closest to the lamp socket.
While engaging the pins in the socket, pivot the lamp
so that the securing clip on the reflector locks into the
open space in the middle of the lamp. See figure 5.
10. Gently pull on lamp to ensure that lamp securing
clip is engaged.
11. Repeat steps 8 and 9 to replace second lamp.
12. Slide control box assembly back into PCO cabinet.
13. Securely fasten access door and reconnect power
cord.
14. Look through the view port in the access door to check
that the lamps are illuminated.
NOTE - On initial start-up, the lamps may not reach full
illumination for several minutes.
WARNING
Electric shock hazard.
Can cause injury or death.
Disconnect all electrical power supplies before ser
vicing.
CAUTION
Personal Burn Hazard.
Lamps become very hot when illuminated.
Allow lamps to cool for 10 minutes before removing
lamp from socket.
Injury may result from contact with hot lamps.
CAUTION
Ultraviolet (UVA) radiation risk.
Prolonged exposure may cause skin or eye damage.
Avoid prolonged (weeks) exposure to skin or eyes.
NOTICE
If the system has been operated for a period of time
without the lamps being illuminated, an odor may
occur when lamps are illuminated. This odor is con
sidered typical and should dissipate within 12 hours
of full operation. If the odor does not subside after
48 hours of operation, instruct the homeowner to
unplug the PCO unit and contact a Lennox dealer.
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Page 7
CAUTION
LAMPS CONTAIN MERCURY.
Ingestion of or contact with mercury or mercury va
por is hazardous to your health.
Take care when handling lamps. If lamp breaks,
avoid contact with mercury.
NOTICE
Part
Description
Annual
Maintenance Kit
PCO14-23 PCO16-28 PCO20-28
X8797 X8796 X8795
Part Number
Replacement Parts
Replacement parts are available through Lennox, see
figure 1 (Page 2) for parts arrangement. Part description
and numbers are as follows:
Hg -- Lamps contain mercury.
Manage in accord with disposal laws.
Refer to www.lamprecycle.org or call
1-800-9LENNOX.
Proper Clean-Up of Broken UVA Lamps
If a lamp is broken, it must be disposed of properly.
Wear protective gloves, eye wear and mask.
Sweep broken glass and debris into a plastic bag. Seal
the bag and dispose of according to instructions given
by local waste management office.
Do not use a vacuum cleaner. Do not incinerate.
Troubleshooting Flow Chart
See figure 8 (Page 8) for the troubleshooting flow chart.
Annual Maintenance Kits
The Annual Maintenance Kits include one MERV 16 filter,
one PureAir Insert and two lamps. Kit part numbers are
as follows:
Part Number
Part Description
Cabinet X8917 X8916 X8915
Access Door X8920 X8919 X8918
UVA Lamp X8794 X8794 X8794
Reflector X8926 X8925 X8924
Lamp Securing Clip X8927 X8927 X8927
PureAir™ Insert X8793 X8792 X8791
MERV 16 Filter X8790 X8789 X8788
Power Cord (120VAC) 49M48 49M48 49M48
Power Cord (230VAC) 91X44 91X44 91X44
Control Box Assem
bly, includes * items
*Electrical Socket 75X77 75X77 75X77
*Lamp Socket X8799 X8799 X8799
*Ballast X8798 X8798 X8798
*Surge Protector X8928 X8928 X8928
PCO14-23 PCO16-28 PCO20-28
X8923 X8922 X8921
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PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
PUREAIR AIR PURIFICATION SYSTEM
Page 8
START
Look through access panel
viewing port to check lamps.
YES
Gently pull on lamp to make
sure the lamps are in place.
Are lamps
seated securely
in sockets?
YES
Unplug PCO power cord and
immediately plug back in.
NO
Is
there power to
PCO?
NO
NO
Slide lamp securely
Check power supply (breakers, plug,
electrical wiring). Repair electrical
problem and plug in power cord.
into lamp socket.
Are
lamps
lit?
Are
lamps
lit?
Did
lamps
light?
NO
YES
YESNO
YES
Continue
with
maintenance
per unit
instruction
manual.
END
Check all electrical
connections, lamps, surge
protector, and ballast. Replace
any burned out or damaged
components and plug unit in.
Are
lamps
lit?
NO
YES
Replace control
box assembly.
Voltage Readings for Troubleshooting
SPM = Surge Protection
Module = Part number X8928
STEP INPUT/OUTPUT WIRE/TERM COLOR NORMAL READING SERVICE ACTION (See wiring diagram, Figure 7, Page 5)
1 INPUT
2 OUTPUT
SPM
3 INPUT
4 OUTPUT
BALLAST
BLACK
WHITE <2 Replace SPM if greater than 2VAC.
BLACK
WHITE <2 Replace SPM if greater than 2VAC.
BLACK
WHITE <2 Replace SPM if greater than 2VAC.
RED
RED
YELLOW
YELLOW
BLUE
BLUE
All voltages are AC, reference to earth ground (Green wire/terminal), at 75°F. All readings
should be taken with lamps securely installed in sockets and circuit connections made.
>105
>105
>105
>60
>60
>110
>110
>200
>200
Replace input power connection or socket if less than 105 VAC.
Replace SPM if less than 105VAC.
Replace SPM if less than 105 VAC.
Replace ballast if less than 60VAC.
Replace ballast if less than 60VAC.
Replace ballast if less than110VAC.
Replace ballast if less than 110VAC.
Replace ballast if less than 200VAC.
Replace ballast if less than 200VAC.
Figure 8. Troubleshooting Flow Chart
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