Lennox C1uvcl10a-2 Germicidal Light Kit Instruction Manual (+ PDF)

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C1UVCL10A-2 Germicidal Light Kit

Product Information

The Germicidal Light Kit C1UVCL10A-2 (21A92; 106881-01) is
designed to emit ultraviolet (UVC) energy that reduces microbial
life forms, such as viruses, bacteria, yeasts, and molds in the
air. The kit comes with shields that focus the UVC light on the
coil surface where it is needed and reduce the exposure of light on
other components and access panels for improved safety and overall
effectiveness. The kit is specifically designed for LG/LC/KG/KC/KH
024-074 units and is equipped with an enhanced rapid start ballast
that provides UVC lamp operation at a full range of operating
conditions. The LED’s on the ballast show lamp operation status,
with the green LED indicating power on and the blue LED indicating
lamp operation. The lamps operate on 110-230V single-phase power
supply, and a door switch is provided which de-energizes the UVC
light when the door is opened.

Product Usage Instructions

Before using the Germicidal Light Kit, it is important to note
that existing mold growth must be appropriately removed prior to
installation of the germicidal lamp. The kit is not intended to be
used for removal of active mold growth. Additionally, cotton gloves
or a cotton cloth must be used when handling the new UVC lamp.

During installation, it is important to follow all instructions
carefully to avoid any property damage, personal injury, or loss of
life. Installation and service must be performed by a licensed
professional installer (or equivalent), service agency or the gas
supplier.

When using the Germicidal Light Kit, it is important to note
that UV light can cause eye and skin damage. Do not look into UV
light source. Access panels must be in place during appliance
operation, and all power sources from UV Light, the Air Handling
Equipment or Duct System must be disconnected.

It is also important to note that application of UVC lamps to
existing mold growth can cause respiratory irritation and allergic
symptoms. Do not use UVC lamps where active mold growth exists.
Remove active mold growth from surfaces prior to operation of UVC
lamps.

Finally, it is important to note that some materials may emit
odors when exposed to UV light, including Technicoated or ECoated
Coils, chemicals, solvents, polymers, and organic materials. Some
occupants may notice irritation or discomfort.

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2022

IAQ – UV LIGHTS

508098-01 9/2022 Supersedes 2/2022

GERMICIDAL LIGHT KIT

INSTALLATION INSTRUCTIONS FOR GERMICIDAL LIGHT KIT C1UVCL10A-2 (21A92; 106881-01) USED WITH LG/LC/LH/KG/KC/KH 024-074 UNITS

WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, person al injury or loss of life. Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier.
WARNING
WARNING UV LIGHT SOURCE
Ultraviolet (UVC) Radiation Hazard.
This cover is provided with an Interlock to reduce the risk of ultraviolet radiation exposure. Any exposure will cause eye and skin damage. Do not look into UV light source. Access panels must be in place during appliance op eration. Disconnect all power sources from UV Light, the Air Handling Equipment or Duct System.
Shipping & Packing List
Package 1 of 1 contains the following: 1 – Germicidal light
1- UVC light assembly 1- UVC lamp 1- UVC light shield (triangular) 1- Ballast 1- Ballast bracket 13- Convoluted tubing (varying lengths) 1 – Bag assembly containing: 1- Warranty sheet 1- UVC Danger label 53- Wire ties 8- #10-16 x 5/8″ sheet metal screws 1- #10-32 x 1/2″ green ground screw 2- Dual quick connect adapters 2- Wire harnesses 2- Wiring diagrams 1- Door switch 1- Door bracket 2- #10-32 x 1/2″ Self drilling screws 1- UVC field kit label An additional, separately ordered T49 transformer is required on LCH/KC/KH, 460/575V units which do NOT have a T3 transformer (unless powered directly). NOTE – Not all components provided in kit are used in each application. Check packaging for shipping damage. Contact the last carrier immediately if any shipping damage is found.

CAUTION
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal in jury. Take care while handling this equipment and wear gloves and protective clothing.
General
Germicidal lights emit ultraviolet (UVC) energy that has been proven effective in reducing microbial life forms (viruses, bacteria, yeasts, and molds) in the air.
UVC germicidal lamps greatly reduce the growth and proliferation of mold and other bio-aerosols (bacteria and viruses) on illuminated surfaces.
Germicidal lamps are NOT intended to be used for removal of active mold growth. Existing mold growth must be appropriately removed PRIOR to installation of the germicidal lamp.
A door switch is provided which de-energizes the UVC light when the door is opened.
IMPORTANT – Cotton gloves or a cotton cloth must be used when handling the new UVC lamp.
Application
The UVC light kit is specifically designed for LG/LC/KG/KC/KH 024-074 units. In addition, the light is equipped with shields to focus the UVC light on the coil surface where it is needed and reduce the exposure of light on other components and access panels for improved safety and overall effectiveness.
Enhanced rapid start ballast provides UVC lamp operation at a full range of operating conditions. LED’s on ballast show lamp operation status:
Green LED indicates power on. Blue LED indicates lamp operation. Lamps operate on 110-230V single-phase power supply. Alternately, 110V power supply may be used to directly power the UVC ballast(s). Be sure to wire the interlock door switch which interrupts power to the UVC light; see Ballast Supply Cable section.
WARNING
Potential Mold Spore Release.
Application of UVC lamps to existing mold growth can cause respiratory irritation and allergic symp toms.
Do not use UVC lamps where active mold growth ex ists. Remove active mold growth from surfaces prior to operation of UVC lamps.

Page 1

NOTICE
Potential odor emissions.
Odors may be present when some materials are ex posed to UV light.
These materials may include Technicoated or ECoated Coils. Other materials may include chemi cals, solvents, polymers and organic materials.
Some occupants may notice irritation or discomfort.
If odors are present, the UV Lights should be turned off and fresh air should be introduced into the occu pied space immediately. Contact your Independent Lennox Dealer.

CAUTION
Potential Risk of Degradation of Materials.
Potential of degraded wire insulation may cause hu man injury through electrical shock.
UVC light may damage plastics and rubber materi als. May cause fabric discoloration.
Avoid UVC light exposure to plastic drain pans, wire insulation, flex duct or other plastic/rubber compo nents.
Before installation, confirm that any corrosion-re sistant coating (if applied to the coil) will not be nega tively impacted by the UVC light exposure.

Specifications

Enhanced ballast dimension

11.75″ L x 2.75″ W x 1.625″ H (298mm x 70mm x 42mm)

Lamp assembly dimension

40.75″ L x 2″ W x 2.75″ H (1035mm x 51mm x 60mm)

Triangular sheet metal panel dimension

30″ L x 12″ W x 1″ H (762mm x 305mm x 25mm)

Electrical power supply

110/230V, 50/60Hz, 0.5A

NOTE – For 460V & 575V LGH, LCH, KG, KC and KH units, order separate step-down T49 transformers.

Power consumption

51 Watts

Lamp/Ballast Operating Environment (All models)

Temperature (outside of duct):

5°F to 140°F (-15°C to 60°C)

Relative humidity

<95%.

Listings:
ETL Safety Listing File #2002554 This device complies with FCC – CFR47 Part 18 Consumer (Class A and B). FIFRA (Federal Insecticide Fungicide Rodenticide Act) – File No. 73316. U.S. Patent Nos: (PENDING)

Specifications subject to change without notice.

Part No.
50W91 50W92

Replacement Part Description
UVC lamp Enhanced ballast

Before Installation
S Turn off power to the rooftop unit. S Open access to the control box, blower compartment
and the filter section.

WARNING
Electric shock hazard.
Can cause injury or death. Disconnect all remote power supplies before opening any unit access panels.
Unit may have multiple power supplies. Do not operate without access panels in place.

UVC Exposure Protection
The UVC light is equipped with a unique directional shield to focus the UVC light on the coil surface and drain pan where it is needed and reduce the exposure of light on other components such as wiring, plastic parts etc. For shielding of electrical wiring in the rooftop unit, black convoluted tubing is provided in the unit. However, if there is any concern, aluminum foil tape can be used to cover up any exposed component.
WARNING
Potential Risk of Fire.
Dust, lint and other debris may cause fire if allowed to come in contact with illuminated UVC lamp.
Remove any dust, lint or other debris from lamps and surrounding duct system.

Page 2

Install Ballast
1- Units With Disconnect Box Install the ballast onto the side of the disconnect box; discard ballast bracket. See figure 1. Align holes in ballast with pre-punched mounting holes in the disconnect box. Secure with #10-16X” screws included in the kit.
2- No Disconnect Box Install the ballast bracket on the compressor section mullion. See figure 2. Align bracket holes with pre-punched mounting holes on the mullion. Install the ballast on the ballast bracket.
Install Door Switch
Install bracket and switch on front of blower deck as shown in figure 3 and 4.
Route Ballast Cable
Route the ballast cable through the divider panel into the blower section. See figure 4. Wire tie the cable at multiple locations along the refrigerant line.
INSTALLATION ON DISCONNECT BOX (BALLAST BRACKET NOT USED)

COMPRESSOR MULLION

DISCONNECT BOX

4-PIN CONNECTOR
BALLAST CABLE

BALLAST SCREWS
POWER SUPPLY CABLE
WHITE, 2-WIRE HARNESS
(for door switch power)

INSTALLATION ON UNIT MULLION

COMPRESSOR MULLION
BALLAST BRACKET

4-PIN CONNECTOR
BALLAST CABLE

BRACKET SCREWS

BALLAST SCREWS
POWER SUPPLY CABLE
WHITE, 2-WIRE HARNESS
(for door switch power)

FIGURE 2 INSTALL DOOR SWITCH
BLOWER DECK

SWITCH

BRACKET

FIGURE 3

FIGURE 1

Page 3

UVC LIGHT SHIELD (TRIANGULAR)

ROUTE THE BALLAST CABLE AND DOOR SWITCH WIRES

DETAIL A

WIRE TIE

CONNECTOR SLEEVE

UVC LIGHT CABLE

UV LIGHT ASSEMBLY

DIVIDER PANEL
WHITE TWO-WIRE DOOR SWITCH HARNESS

DETAIL A

BALLAST ASSEMBLY

BLOWER SECTION

DOOR SWITCH

COMPRESSOR MULLION
FIGURE 4

Ballast Power Supply Cable

1- Route the power supply cable as shown in
Figure 5 – 230V LGH/LCH/KG/KC/KH Figure 6 – 460/575V LGH/LCH/KG/KC/KH Figure 10 – 230V LGM/LCM Figure 11 – 460/575V LGM* Figure 12 – 460/575V LCM
2- Make wiring connections as shown in: Figure 7 – 230V LGH/LCH/KG/KC/KH Figure 8 – 460/575V LGH/KG with T3 Figure 9 – 460/575V LGH/LCH/KG/KC/KH with T49 Figure 10 – 230V LGM/LCM Figure 11 – 460/575V LGM* Figure 12 – 460/575V LCM
*Kit harnesses not used.

WHITE TWO-WIRE DOOR SWITCH HARNESS
230 VOLT WIRE ROUTING LGH/LCH/KG/KC/KH
T1

BALLAST POWER CABLE

BALLAST

Page 4

FIGURE 5

460/575 VOLT WIRE ROUTING LGH/KG/KC/KH WITH T3 or T49
T3 OR T49

BALLAST POWER CABLE
BALLAST

NOTE – T49 IS ORDERED SEPARATELY AND FIELD-INSTALLED WHEN THERE IS NO T3
FIGURE 6
BALLAST POWER AND WHITE HARNESS WIRING 230 VOLT LGH/LCH/KG/KC/KH UNITS

Route Two White

Harness Wires to the

Door Switch

White Power Cable Wire

and White Harness Wire

(already connected)

Ballast Power Cable

White Power Cable
Wire

White Harness
Wire Common

Green Power Cable Wire

FIGURE 7 Page 5

Black Power Cable Wire
230V
TI Transformer

BALLAST POWER AND HARNESS WIRING 460/575 VOLT LGH/KG UNITS FACTORY-INSTALLED T3

Disconnect factoryinstalled gas
harness from T3.
DETAIL A

Route Two White

Harness Wires to the

Door Switch

White Power Cable Wire

and White Harness Wire

(already connected)

Ballast Power Cable
Black Power Cable Wire
230V
Green Power Cable Wire

White Power Cable
Wire

White Harness
Wire Common
Reconnect gas harness; see
Detail A.
Black Kit Harness (1 of 2)
T3 Transformer

Dual Adapter

K1 Contactor

FIGURE 8 Page 6

BALLAST POWER AND WHITE HARNESS WIRING 460/575 VOLT LGH/LCH/KG/KC/KH UNITS
WITH SEPARATELY ORDERED AND INSTALLED T49 TRANSFORMER

Route Two White

Harness Wires to the

Door Switch

White Power Cable Wire

and White Harness Wire

(already connected)

Ballast Power Cable

White Power Cable
Wire

White Harness
Wire Common
Black Power Cable Wire
230V

Green Power Cable Wire

T49 Transformer
Ordered Separately
Dual Adapter

K1 Contactor

FIGURE 9 Page 7

230 VOLT WIRING

LGM/LCM

Route Two White

Harness Wires to the

White Power Cable Wire

Door Switch

and White Harness Wire

(already connected)

Ballast Power Cable

White Harness
Wire Common

ROUTE TWO WHITE WIRES TO
DOOR SWITCH

Quick Connects
Black Wire Green Wire 230V

ROUTE TWO HARNESS WIRES TO DOOR SWITCH
DOOR SWITCH

TI TRANSFORMER
BALLAST

ROUTE POWER CABLE AND HARNESS BEHIND THE DISCONNECT
TO T1 IN THE CONTROLS AREA FIGURE 10
Page 8

BALLAST BLACPOK,WWEHRITE,
ANDCAGBRLEEEN WIRES
WHITE, 2-WIRE HARNESS (for door switch power)

460/575 VOLT WIRING WITH T5 LGM
1- Discard kit two-wire jumper harnesses
and quick connect adapters.

2- A three-wire jumper harness is factoryinstalled on each of the red wires (230V output) coming from the T5 transformer. One leg powers the Combustion Air In ducer, one leg powers the Outdoor Fan, and the 3rd leg is open for the optional UVC kit. Refer to the pictorial shown here for wiring.

Route Two White Harness Wires to the Door Switch
(230V)
To OD Fan

3- Connect the power cable wires to the black and white harness wires as shown. Connect the green ground wire.

White Power Cable Wire and White Harness Wire
(already connected)
To CAB
CONNECT THESE WIRES
Power Cable White Wire
Neutral

Route Two White Harness Wires to the
Door Switch

Red T5 Transformer
Wires (230V)

Power Cable Black Wire (230V)
Green Wire Ground Ballast Power Cable

DOOR SWITCH

BALLAST
Green Wire Ground
T5 TRANSFORMER

BLACK, WHITE, AND GREEN WIRES

ROUTE POWER CABLE AND HARNESS BEHIND THE DISCONNECT TO T5 BELOW THE CONTROLS AREA
FIGURE 11
Page 9

WHITE, 2-WIRE HARNESS (for door switch power)

460/575 VOLT WIRING WITH T5 LCM

White Power Cable Wire and White Harness Wire
(already connected)

1- Connect the power cable wires to the black and white harness wires as shown. Connect the green ground wire.
2- Disconnect two T5 transformer red wires from outdoor fan wires.
3- Install dual quick connect adapters on transformer wires.

Route Two White Harness Wires to the
Door Switch
Outdoor Fan Wire
(230V)
White Harness (230V)

Outdoor Fan Wire
(230V)

4- Install the black harnesses, provided in this kit, as shown.
Route Two White Harness Wires to the
Door Switch

Black Kit Harnesses
Red Transformer Wires (230V)
Green Wire Ground

Power Cable White Wire
Neutral
Power Cable Black Wire (230V)

Ballast Power Cable

DOOR SWITCH

BALLAST
Green Wire Ground
T5 TRANSFORMER

BLACK, WHITE, AND GREEN WIRES

ROUTE POWER CABLE AND HARNESS BEHIND THE DISCONNECT TO T5 BELOW THE CONTROLS AREA
FIGURE 12
Page 10

WHITE, 2-WIRE HARNESS (for door switch power)

Install UVC Light Assembly
The lamp for the UVC light assembly comes separately packaged in a foam sleeve. 1- Wear cotton gloves or use a cotton cloth when
handling the new lamp. Place the lamp in the holder clips of the UVC sub-assembly (see figure 13). Verify that the lamp flange at the connector end is positioned between the lamp holder clip and the sheet-metal end stop (see detail A in figure 13).
INSTALL LAMP IN HOLDER CLIPS
UVC Sub-Assembly
BANDS (see Note below)

Install Lamp Cable
1- Run the UVC lamp cable through the open loop of wire tie attached to the UVC assembly (see figure 15).
NOTE:- The cable should not extend past the UVC assembly to be in direct line of sight of UVC lamp. 2- Firmly connect the 4-pin connector to the pin end of the
lamp. Make sure that the connector sleeve is pushed on the lamp end. Tighten the wire tie loop to strain relief the lamp cable. Trim the wire tie.
INSTALL LAMP CABLE
4-PIN CONNECTOR OPEN LOOP WIRE TIE

DETAIL A

SHEET METAL END STOP

LAMP FLANGE

4-PIN CONNECTOR

LAMP

HOLDER CLIPS (2)

NOTE – The bands around the lamp should be evenly spaced as shown in the diagram.

FIGURE 13 2- Carefully place the UVC assembly on the blower deck.
Line up the mounting holes on the UVC assembly with the mounting holes on the blower deck (see figure 14). Use the #10 screws provided to attach the UVC assembly in place.

ATTACH LIGHT ASSEMBLY

UVC LIGHT ASSEMBLY

UVC LIGHT CABLE

UVC LIGHT ASSEMBLY

FIGURE 15
Install Convoluted Tubing
Install convoluted tubing (included in the kit) to shield electrical wiring and components. The tubing is split type making it easy to slip on the wiring. Black wire ties are provided to tie the tubing in place. See figure 16. Not all tubing is used depending on unit options.

#8 SCREWS
FIGURE 14

Page 11

FIGURE 16 Page 12

Install Triangular UV Shield
To block the UVC light from reaching the filter access door, install the triangular sheet-metal panel (see figure 17).
INSTALL TRIANGULAR UV SHIELD
COIL BRACKET

SHIELD FLANGE FACING
OUT
TRIANGULAR UV SHIELD

DETAIL A

# 8-18 x 1/2″ SCREWS

FIGURE 17
With the left flange of the triangular sheet metal panel facing out (see Detail A in figure 17), insert and lower the bottom of the panel through the opening in the filter access door, to the right of the coil and ahead of the refrigerant lines. Slide the panel against the coil bracket and align the holes of the panel with the pre-punched holes on the coil bracket. Use #8-18 x 1/2″ screws (included) to attach the panel to the coil bracket. See figure 17.
NOTE – The view port in the triangular panel provides a visual verification when the UVC lamp is turned on. Do not remove the view port as it shields UVC light and protects eyes from UVC exposure.
Finish Installation
Close all access doors before powering UVC lamp. Apply UVC Danger label and UVC Field Kit label to blower access door so that it is clearly visible. See figure 18.

Configure M4 For UVC Light
1- Use the following mobile service app menu to configure the Unit Controller. SETUP > INSTALL > RTU INFORMATION > CONFIGURATION ID2
2- Set position 6 to to the appropriate setting to enable the UVC: 2=UV Lamp Only Installed 3=Both UV Lamp and Ionizer Installed
M3 Unit Controller Configuration
Configure the Unit Controller to enable the UVC Lamp using the following menu:
SETUP . INSTALL Navigate through the various setup questions until Configuration ID 2 appears. Set position six to the following to enable the UVC feature: 1=UV Lamp only installed 3=BOTH UV Lamp and Ionizer installed.
Operation
For optimal performance, continuous operation of the UVC germicidal lamp is recommended.
ADD UVC DANGER LABELS
BLOWER MOTOR ACCESS DOOR
UVC DANGER LABEL
UVC FIELD KIT LABEL
FIGURE 18

Page 13

Maintenance
WARNING
Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.
S For all maintenance, contact a qualified HVAC technician.
S Read the maintenance instructions before opening unit panels.
S Unintended use of the unit or damage to the unit housing may result in the escape of dangerous UVC radiation. UVC radiation may, even in small doses, cause harm to the eyes and skin.
S Do not operate units that are obviously damaged.
S Do not discard the triangular UVC light shield or any barriers with an ultraviolet radiation symbol.
S Do not override the door interlock switch that interrupts power to the UVC light.
S Do not operate the UVC light outside of the unit.
LED(s) not illuminated Power status LED not lit–Check that the lamp unit is connected to the proper power source and is wired correctly. Lamp status LED(s) not lit–
1- Check that lamp 4-pin connectors are properly engaged.
2- Ohm-check across the lamp pins to check for continuity of lamp filaments (see figure 20).
Troubleshooting charts are provided to aid in determining the cause of any problems encountered (figures 19 and 20).
Annual Lamp Replacement
WARNING
Personal Burn Hazard. Personal injury may result from hot lamps. During re placement, allow lamp to cool for 10 minutes before removing lamp from fixture.

The lamp should be replaced every 12 months, as UVC energy production diminishes over time.
1- Obtain the correct replacement lamp for your germicidal light model.
2- Disconnect power to the rooftop unit before servicing the UVC kit.
3- Open the blower access door.
4- Remove the screw in wire tie from the UVC assembly and disconnect the 4-pin connector from the lamp end.
5- Remove the (2) mounting screws of the UVC assembly. Carefully slide the complete UVC assembly out through the blower access door.
6- Allow 10 minutes before touching the lamps. Then, carefully remove the old lamp from the lamp holder clips.
7- Wear cotton gloves or use a cotton cloth when handling the new lamp. Place the new lamp in the holder clips of the UVC assembly. Verify that the lamp flange at the connector end is sandwiched between the lamp holder clip and the sheet-metal end stop (see figure 13).
8- Carefully place the UVC assembly on the blower deck. Line up the mounting holes on the UVC assembly with the mounting holes on the blower deck (see figure 14). Use the #10 screws provided to attach the UVC assembly in place.
9- Close the blower access door.
10- Reconnect power to the rooftop unit.
11- Open the filter access door and look through the view port in the triangular sheet-metal panel to verify that the UVC light is on.
Lamp Disposal
Hg-LAMP Contains Mercury.–Manage in accordance with local, state and federal disposal laws. Refer to www.lamprecycle.org or call 1-800-9-LENNOX.
Proper Clean-up Technique in Case of Lamp Breakage
Wear protective gloves, eye wear and mask.
Sweep the broken glass and debris into a plastic bag, seal the bag, and dispose of properly. Contact your local waste management office for proper disposal.
Do not use a vacuum cleaner. Do not incinerate.

Page 14

DANGER
Ultraviolet (UVC) Radiation hazard. Any exposure will cause significant eye damage and may cause skin damage. DO NOT look into UVC light source. Access panels must be in place during appliance operation.
UVC LIGHT TROUBLESHOOTING – POWER

UVC LAMP NOT OPERATING
DONE

POWER LED

LIT?

YES

CHECK LAMP LEDS

YES

NO LAMP LEDS
LIT?

USE MULTIMETER TO TEST 110-230V AT
BALLAST INPUT LEADS

CORRECT VOLTAGE PRESENT? NO
YES
CHECK POWER
LEDS

FIRST TURN THE POWER OFF; CHECK THE WIRING
TURN POWER BACK ON

POWER LED YES LIT NOW?
NO GO TO LAMP LED TROUBLESHOOTING
FIGURE 19

REPLACE BALLAST