Lennox PUREAIR PCO14-23 User manual

10/09 505,276M
*2P1009* *P505276M*
Page 1
AIR CLEANERS / FILTERS Litho U.S.A.
E2009 Lennox Industries Inc.
Dallas, Texas, USA 505,276M
10/09
Supersedes 07/09
PUREAIRtAIR PURIFICATION SYSTEM
PHOTOCATALYTIC OXIDATION (PCO)
TECHNOLOGY
INSTALLATION INSTRUCTIONS FOR PUREAIRTAIR PURIFICATION SYSTEM
MODELS PCO14−23, PCO16−28 AND PCO20−28
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Shipping & Packing List
Assembled PureAirtair purification system which in-
cludes:
1 − Cabinet
1 − Control box assembly (includes frame, ballasts
and associated wiring)
1 − MERV 16 pleated filter
2 − UVA lamps
1 − Titanium dioxide metal insert
1 − Power cord (120VAC)*
*230VAC power cord available separately (part number
91X44).
A warranty certificate and registration card are also in-
cluded.
Shipping Damage
Check equipment for shipping damage. If damage is
found, immediately contact last carrier.
General Information
The PureAirtair 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 PureAirtsystem 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 op-
eration of the PureAirtair purification system. It may take
up to 48 hours after initial system start−up to reduce the air-
borne 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 µg/m3. Home
source removal and ventilation may be required to lower
TVOCs to this level.
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 PureAirtair
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.
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
SCotton gloves and cloth (to remove fingerprints from
lamps)
SAluminum foil tape or water−based mastic (NOT sili-
cone) to be applied as a sealant.

Page 2
505,276M 10/09
Parts Identification
Control Box Cover
Access Door
MERV 16 Filter
Control Box
Assembly
UVA Lamps
Reflectors
Metal Insert
Ballast
Surge Protector
Lamp
Securing
Clips
Cabinet
Electrical
Socket
Lamp Socket
Figure 1. PCO Parts Identification
Installation Examples
The PCO must not be installed in
a confined space where service
clearance would be restricted.
A metal transition should be used.
The transition must be planned for
each job. Reduction should not be
more than 4 inches per linear foot,
approximately 20 angular degrees.
Note − At sharp turns,
install turning vanes
before the PCO.
Upflow
(Side Installation)
Upflow
(Side installation with PCO access panel pointed
upward and lamps suspended vertically −− NOT
RECOMMENDED) Contact the Technical Support
Department at 1.800.953.6669 for additional infor-
mation.
Upflow
Downflow Horizontal
Typical Transition
Figure 2. Installation Examples

Page 3 PUREAIRtAIR PURIFICATION SYSTEM
PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
Dimensions and Specifications
10
(254) A
B
PCO14−23 23 (584) 21−1/8 (537)
Model A B
PCO16−28
PCO20−28 28−1/2 (724) 21−1/8 (537)
28−1/2 (724) 17−1/4 (438)
Figure 3. Dimensions and Specifications
WEIGHT
PCO14−23 34 lbs.
PCO16−28 36 lbs.
PCO20−28 39 lbs.
ELECTRICAL
PCO14−23 120V, 50/60 Hz,
1 2 Amps Maximum
PCO16−28 1.2 Amps −− Maximum,
2
30
V
,
50/60
Hz
,
PCO20−28
230
V
,
50/60
Hz
,
0.65 Amps −− Maximum
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.
Approximate Air Flow Resistance (Cabinet and Filter)
Capacity
(Tons)
Flow
Rate
Pressure Drop (in. w.g.)
(T
ons
)
R
a
t
e
(CFM) PCO14−23 PCO16−28 PCO20−28
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.
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 metal insert must be removable.
Allow Approximately
30" of Clearance
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.

Page 4
505,276M 10/09
NOTICE
This appliance is intended for return air duct instal-
lation only.
Improper installation may damage PureAirtsys-
tem, HVAC system, or other equipment and may
also void warranty.
Remove Protective Wrapping
The metal insert is shipped in a protective vacuum packag-
ing. Packaging must be removed prior to installation. Take
care to prevent damage to metal insert when removing
packaging.
NOTICE
Unpacking required.
Remove all protective packing material from the
UVA lamps and the titanium dioxide metal insert.
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. Remove the PCO access door.
2. Slide out the control box assembly.
3. Remove protective cardboard sleeves from lamp/re-
flector assembly.
4. Ensure lamp is properly inserted in the lamp socket.
5. If necessary, reseat lamp by gently engaging the pins
in the socket and pivoting the lamp to engage the two
securing clips mounted on the reflector.
6. Gently pull on lamp to ensure that lamp securing clips
are engaged.
7. Repeat steps 3 through 6 to check installation for sec-
ond lamp.
8. Slide vacuum−packaged metal insert out of cabinet.
Carefully remove insert from packaging.
9. Keep metal insert and filter in a safe place to ensure
these components remain clean until the cabinet
installation is completed.
Reflector
Lamp Socket Lamp
Lamp
Securing
Clips
Slide lamp pins into lamp socket and pivot
lamp inward onto lamp securing clips.
Pins
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 installa-
tion 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 cabi-
net. Ensure fasteners do not interfere with internal compo-
nents of the PCO cabinet. Filter, metal 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" maxi-
mum length), rivets or other appropriate fasteners to
secure PCO cabinet to the return air side of the air han-
dling 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.
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.
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 metal insert.
NOTICE
Route power cord away from traffic areas where the
cord may become a safety hazard.

Page 5 PUREAIRtAIR PURIFICATION SYSTEM
PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
Installing Filter and Metal Insert
Use the following procedure to install both filter and metal
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 metal 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 re-
ceptacle 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.
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.
Slide metal insert, MERV 16 filter and control box
assembly into cabinet. Securely fasten access door.
Control Box
Assembly
Metal Insert
MERV 16
Filter
Access
Door
Air
Handler
Figure 6. Installing Filter and Metal 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.
Figure 7. Wiring Schematic
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.
2. Lamps should remain illuminated continuously except
during service and maintenance.
3. For optimal odor control, air handler blower should re-
main 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 infor-
mation. Lennox units which include the SureLight®inte-
grated control do not require the use of an additional relay.
NOTE − Continuous fan operation may result in higher hu-
midity. If humidity levels are uncomfortably high, fan set-
ting should be switched to AUTO during cooling operation.

Page 6
505,276M 10/09
Filter, Insert and Lamp Replacement
The PCO MERV 16 filter, metal insert and UVA lamps
must be replaced annually. More frequent replacement
may be required in applications with heavier dust or dirt
loads or if you notice a reduction in odor−removal efficien-
cy. An annual maintenance kit, which includes a replace-
ment MERV 16 filter, a replacement metal insert and two
replacement UVA lamps, is available through Lennox .
See Annual Maintenance Kit" (Page 7) for applicable kit
part number.
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.
1. Unpack the replacement MERV 16 filter, UVA lamps
and metal 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 ex-
isting MERV 16 filter.
4. Check air flow direction of the MERV 16 filter and in-
sert replacement filter into the PCO cabinet.
5. Remove the existing metal insert from the cabinet.
NOTICE
Do not wash metal insert. Soap and water will de-
stroy the titanium dioxide catalyst that coats the in-
sert surface.
6. Check air flow direction of the replacement metal in-
sert and slide the metal insert into the cabinet.
7. Wipe down reflectors using cotton cloth to remove fin-
gerprints and contaminants.
8. Pivot the lamp away from the reflector until lamp is re-
leased from the securing clips. 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 clips on the reflector lock into the
open space in the middle of the lamp. See figure 5.
10. Gently pull on lamp to ensure that lamp securing
clips are 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.
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.
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
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.
SWear protective gloves, eye wear and mask.
SSweep broken glass and debris into a plastic bag. Seal
the bag and dispose of according to instructions given
by local waste management office.
SDo not use a vacuum cleaner. Do not incinerate.

Page 7 PUREAIRtAIR PURIFICATION SYSTEM
PHOTOCATALYTIC OXIDATION (PCO) TECHNOLOGY
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 metal insert and two lamps. Kit part numbers are as
follows:
Part Part Number
Part
Description PCO14−23 PCO16−28 PCO20−28
Annual
Maintenance Kit X8797 X8796 X8795
Replacement Parts
Replacement parts are available through Lennox, see fig-
ure 1 (Page 2) for parts arrangement. Part description
and numbers are as follows:
Part Number
Part Description PCO14−23 PCO16−28 PCO20−28
Access Door X8920 X8919 X8918
UVA Lamp X8794 X8794 X8794
Reflector X8926 X8925 X8924
Lamp Securing Clip X8927 X8927 X8927
Metal 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 X8923 X8922 X8921
*Electrical Socket 75X77 75X77 75X77
*Lamp Socket X8799 X8799 X8799
*Ballast X8798 X8798 X8798
*Surge Protector X8928 X8928 X8928

Page 8
505,276M 10/09
END
YES
NO Replace control
box assembly.
NO
Check power supply (breakers, plug,
electrical wiring). Repair electrical
problem and plug in power cord.
YESNO
Slide lamp securely
into lamp socket.
YES
NO
Are lamps
seated securely
in sockets?
Continue
with
maintenance
per unit
instruction
manual.
NO
Look through access panel
viewing port to check lamps.
START
NO
Unplug PCO power cord and
immediately plug back in.
Are
lamps
lit?
Voltage Readings for Troubleshooting
All voltages are AC, reference to earth ground (Green wire/terminal), at 75°F. All read-
ings should be taken with lamps securely installed in sockets and circuit connections
made.
SPM = Surge Protection
Module = Part number X8928
YES
YES
Check all electrical
connections, lamps, surge
protector, and ballast. Replace
any burned out or damaged
components and plug unit in.
Is
there power to
PCO?
Are
lamps
lit?
Are
lamps
lit?
Gently pull on lamp to make
sure the lamps are in place.
Did
lamps
light?
YES
STEP INPUT/OUTPUT WIRE/TERM COLOR NORMAL READING SERVICE ACTION (See wiring diagram, Figure 7, Page 5)
1
INPUT
BLACK >105 Replace input power connection or socket if less than 105 VAC.
1
INPUT
WHITE <2Replace SPM if greater than 2VAC.
2
OUTPUT
BLACK >105 Replace SPM if less than 105VAC.
P
M
2
OUTPUT
WHITE <2Replace SPM if greater than 2VAC.
S
P
3
INPUT
BLACK >105 Replace SPM if less than 105 VAC.
3
INPUT
WHITE <2Replace SPM if greater than 2VAC.
RED >60 Replace ballast if less than 60VAC.
RED >60 Replace ballast if less than 60VAC.
S
T
4
OUTPUT
YELLOW >110 Replace ballast if less than110VAC.
L
LA
S
4 OUTPUT YELLOW >110 Replace ballast if less than 110VAC.
B
AL
L
BLUE >200 Replace ballast if less than 200VAC.
B
BLUE >200 Replace ballast if less than 200VAC.
Figure 8. Troubleshooting Flow Chart