Larson Electronics IND-HVAC-DTW-UVC-R1-SS Series Manual

IND-HVAC-DTW-UVC-R1-SS series
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Air Duct Disinfection Systems
Instruction Guide
These instructions generally describe the installation, operation and maintenance of the IND-HVAC-DTW-
UVC-R1-SS series. Questions that are not specifically answerable by these instructions should be directed to
the Larson Electronics. Larson Electronics takes all possible precautions when packaging equipment to
prevent damage. Carefully inspect and report all damages. Do not install damaged equipment. Follow all
instructions on any labels or tags. Carefully inspect all packing materials before discarding to prevent the loss
of accessories, mounting hardware, spare parts or instructions.
The information and recommendations contained in this publication are based upon data collected by
Larson Electronics and are believed to be correct. However, no guarantee or warranty of any kind,
expressed or implied, is made with respect to the information contained herein. Specifications and
information are subject to change without notice.

IND-HVAC-DTW-UVC-R1-SS series
SAFETY WARNINGS
•All personnel should be alerted to the potential hazards indicated by the product safety labeling on this unit.
•The following conventions are used to indicate and classify precautions in this manual and on product safety
labeling. Failure to observe precautions could result in injury to people or damage to property.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible injury or death.
!
DANGER Danger indicates an IMMINENTLY hazardous situation, which, if not avoided, WILL result in death
or serious injury.
!
WARNING Warning indicates a POTENTIALLY hazardous situation, which, if not avoided, COULD result in
death or serious injury.
!
CAUTION
!
Caution indicates a POTENTIALLY hazardous situation, which, if not avoided, MAY result in minor
or moderate injury.
CAUTION Caution used without the safety alert symbol indicates a potentially hazardous situation, which, if
not avoided, may result in property damage.
This symbol/pictorial is used to identify an
ELECTRICAL
SHOCK or ELECTROCUTION hazard.
This symbol/pictorial is used to identify the need to
wear approved ultraviolet blocking eye wear.
This symbol/pictorial is used to identify the need to
wear protective gloves.
This symbol/pictorial is used to identify an
ULTRAVIOLET LIGHT hazard.
This symbol/pictorial is used to identify the
need to wear approved ultraviolet blocking
face shield.
This symbol/pictorial is used to identify
components which must not be disposed of in
trash
SAFETY INSTRUCTIONS
To guard against injury, basic safety precautions should be observed, including the following:
1. Read and follow ALL safety instructions.
WARNING
!
Avoid exposure to direct or reflected germicidal ultraviolet rays. Germicidal
ultraviolet rays are harmful to the eyes and skin.
WARNING
!
2. Intended for indoor use only.
3. Do not alter design or construction.
4. Do not use this fixture for other than its intended purpose, as described in this manual.
5. Do not mount under any source of moisture or condensation, such as humidifiers, cooling coils, etc.
6. Do not remove any labels or devices.
7. Germicidal ultraviolet rays may break down plastic, rubber or other non-metallic materials,
with inadequate resistance to ultraviolet. Shield all plastic, rubber or other non-metallic parts such as; plastic
drain pans, wire insulation, flex ducts, humidifiers, filters, etc. which may be exposed to direct or reflected
germicidal ultraviolet rays.
CAUTION
!
8. Do not operate without proper electrical ground.
9. Do not operate the unit if there is visible or suspected damage to the unit or, if applicable, there is damage to power cord
and/or plug.
10. Utility power supplied, to the fixture, MUST match power requirements listed on the fixture label.
11. Always disconnect power to the unit before performing any service or maintenance.
12. Ultraviolet light must be contained within duct and visible only through supplied sight glass assembly.
13. Read and follow all notices and warnings on the unit.
14. SAVE THESE INSTRUCTIONS.
WARNING
!
WARNING
!
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IND-HVAC-DTW-UVC-R1-SS series
SAFETY LABELS
Danger Label: Hazardous Voltage
and Ultraviolet Radiation (70-0038) Location of Danger Label Location of Danger Label
CAUTION
It is the user’s responsibility to determine and validate the suitability of this equipment for use in the user’s system or
process.
No warranty or representation is made by the manufacturer with respect to suitability or performance of this
equipment or to the results that may be expected from its use.
The user should periodically inspect, clean as necessary and confirm the presence and good legibility of the product
safety labels. Contact the factory for replacement labels in the event that any of the labels are missing or illegible.
PRODUCT APPLICATION
CONSTRUCTION
The Air Duct Disinfection Unit consists of:
•Germicidal Ultraviolet Lamps, which deliver ultraviolet energy in the specific wavelength of 254 nanometers (nm)
which effectively destroys airborne microbes including: virus, bacteria, and mold spores.
•Units use Electronic Ballasts available in 120v 50/60Hz or 230v 50/60Hz.
•A standard, NEMA 5-15 three-prong plug is provided on 120VAC 50/60Hz units. Units which are 230v 50/60Hz are
provided with a continental European plug.
•A separate sight glass assembly provides a safe visual indication of germicidal ultraviolet lamp operation without
the risk of ultraviolet exposure.
•All electronics and wiring are housed in an enclosure constructed of stainless steel. Stainless steel construction
provides strength, durability and will withstand most harsh environments.
PRINCIPLE OF OPERATION
The design has been carefully conceived to provide adequate germicidal ultraviolet dosage for air stream or surface
disinfection in new or existing HVAC(Heating, Ventilating & Air Conditioning) Systems. The dosage, as it applies to
ultraviolet disinfection, is a function of time, and the intensity, of ultraviolet radiation, to which the air stream or surface
is exposed. The exposure time, in seconds, is the total time it takes the air to move through the ultraviolet field,
produced by the germicidal lamps. Exposure time is related to the airflow rate; the higher the airflow, the lower the
exposure time or the lower the airflow, the higher the exposure time. The UV intensity is the amount of energy emitted
by the germicidal lamps.
•Air moving in the HVAC System duct passes over the germicidal ultraviolet lamp of the Air Duct Disinfection
Systems and is exposed to the ultraviolet rays emitted by the germicidal lamp.
•The Sight Glass Assembly installed on the duct allows a safe visual indication of germicidal lamp operation.
LIMITATION OF USE
•The Air Duct Disinfection Systems requires professional installation so all wiring complies with applicable state,
local and national electrical and mechanical codes.
•The Air Duct Disinfection Systems requires knowledgeable planning for: location, installation, and supervision to
prevent ultraviolet exposure of occupants.
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IND-HVAC-DTW-UVC-R1-SS series
Overexposure to germicidal ultraviolet rays will result in the irritation of the
eyes and reddening of the skin. For this reason, it is of the utmost importance that your
ultraviolet application be carefully planned and implemented so as to avoid exposure,of
personnel, to direct or reflected ultraviolet rays.
CAUTION
!
• The American Conference of Governmental Industrial Hygienists (ACGIH) has established a Threshold Limit Value (TLV) for
occupational exposure to radiant ultraviolet energy.
• Currently the ultraviolet radiant exposure incident for unprotected eyes or skin should not exceed 0.2 microwatts per square
centimeter (µW/cm2) at 254 nanometers (nm) for an eight (8) hour period.
• Safety and maintenance procedures MUST be implemented to prevent accidental exposure of personnel, who maintain the
HVAC system. All work performed on the HVAC system must be monitored to ensure that it does not adversely impact the
safety or effectiveness of the installation.
UNPACKING
IN ORDER TO PERFORM THIS TASK, BE SURE TO WEAR THE FOLLOWING SAFETY
EQUIPMENT: SAFETY GLASSES OR A FACE SHIELD, AS WELL AS GLOVES.
•Remove the Air Duct Disinfection Unit from its shipping carton.
•Larson Electronics takes all possible precautions when packaging this unit to prevent damage. Carefully inspect the
unit, power cord and plug for damage and report all damage immediately. Do not assemble or operate if there is any
damage, visible or suspected.
•Germicidal lamps are packed separately, to ensure maximum protection for the lamps. Keep the lamps aside until
ready for installation.
•Carefully inspect all packing materials to prevent the loss of accessories, mounting hardware, spare parts or
instructions.
•Do not discard packing materials until unit is assembled and start up is complete.
Duct Warning Label (2 Supplied)
The single unit includes:
• 1 - Single lamp unit with line cord
• 1 - Duct Sealing Gasket
• 1 - Germicidal Ultraviolet Lamp
• 4 - No. 8-18 x 1/2” Self-Drilling Screws
• 1 - Mounting Template
• 1 - 1 inch Sight Glass Assembly with 4 - No.
8-18 x 3/8” Self-Drilling Screws
• 1 - Operating Instructions
• 2 - Duct Warning Labels
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IND-HVAC-DTW-UVC-R1-SS series
INSTALLATION
UNIT PLACEMENT
•Proper unit placement is essential. To ensure safe and effective operation, the location should:
•Have enough duct width to mount unit with lamps perpendicular to airflow, within the longest duct length
for increased exposure time.
•Be able to support the weight of the unit. If the duct construction does not seem capable of supporting the unit, the
duct must be re-enforced, to support the weight, before installing.
•Be on the supply air plenum, LOCATION A (preferred), or on the return air plenum, LOCATION B (alternative).
•Have properly grounded, electrical outlets within reach of the unit’s power supply cord.
•Not be mounted under any source of moisture or condensation, such as humidifiers, cooling coils, etc.
•Not be mounted near any duct openings, joints, seams, etc. If necessary, seal all openings, joints, seams, etc.
using aluminum tape or equivalent ultraviolet resistant material.
•Prevent exposure of any plastic, rubber or other non-metallic materials, with inadequate resistance to ultraviolet,
such as; plastic drain pans, wiring insulation, flex ducts, humidifiers, filters etc. If necessary, shield all plastic,
rubber or other non-metallic materials using aluminum tape, conduit, sheet metal or equivalent ultraviolet resistant
material.
•Be free of any components that would be damaged by or interfere with the installation.
•Be easily accessible for viewing lamp operation through Sight Glass Assembly.
•Be easily accessible and allow enough clearance for routine cleaning or maintenance.
•Be downstream from air filters. Dust particles reduce the effectiveness of the unit.
•Other mounting positions and locations are possible; contact factory for any questions regarding this.
The 4 unit includes:
• 1 - 4 lamp unit with line cord
• 4 - Germicidal Ultraviolet Lamps
• 4 - No. 8-18 x ½” Self-Drilling Screws
• 1 - 2-in. Sight Glass Assembly with 4 - No. 8-18 x 3/8” Self-Drilling Screws
• 1 - Operating Instructions
• 2 - Duct Warning Labels
The 2 unit includes:
• 1 - 2 lamp unit with line cord
• 2 - Germicidal Ultraviolet Lamps
• 4 - No. 8-18 x ½” Self-Drilling Screws
• 1 - 2-in. Sight Glass Assembly with 4 - No. 8-18 x 3/8” Self-Drilling Screws
• 1 - Operating Instructions
•2 - Duct Warning Labels
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IND-HVAC-DTW-UVC-R1-SS series
Figure 1 – Unit Placement
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IND-HVAC-DTW-UVC-R1-SS series
Figure 2 – Unit Installation - Outside Duct Mount
Opening for outside mount (shown) - use full
size template on page 15 and 16 to cut opening.
Insert unit. Attach unit using the face mounting
bracket and self-drilling screws.
Lamp operation can be seen through sight glass assembly. View inside duct.
Full inside installation using rear mounting brackets (shown). Attach with self-drilling screws
Figure 3 – Unit Installation - Inside Duct
INSTALLATION ADHO
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IND-HVAC-DTW-UVC-R1-SS series
UNIT AND LAMP INSTALLATION, REPLACEMENT, OR CLEANING
IN ORDER TO PERFORM THIS TASK, BE SURE TO WEAR THE FOLLOWING SAFETY
EQUIPMENT: SAFETY GLASSES OR A FACE SHIELD, AS WELL AS GLOVES.
!
WARNING
Always disconnect power to the unit before performing any service or maintenance.
Ultraviolet lamps are easily damaged and may cause injury if broken. Exercise care when
handling.
!
CAUTION
1. Disconnect power to the HVAC system.
2. Using mounting templates provided, (See Figure 8 if applicable) mark the centers of the four (4) mounting holes
and edges of the rectangular openings for lamp assembly and sight glass assembly.
!
CAUTION
Mechanical hazard. Duct sheet metal has sharp edges. Wear protective gloves when
working on or around duct sheet metal.
3. Cut out the rectangular openings for lamp assembly. Remove burrs and sharp edges where possible.
4. Test fit unit to duct. Lamp assembly should pass through rectangular opening, with no interference. Base plate
should fit flush to duct and mounting holes of the base plate should be aligned with the center marks on duct.
5. Remove unit from duct; make any adjustments necessary until unit fits correctly.
6. Install Sight Glass Assembly (see page 9).
Ultraviolet lamps are easily damaged and may cause injury if broken. Exercise care when handling.
!
CAUTION
7. Install lamp(s) in Air Duct Disinfection Systems. To install, insert lamp pin into spring-loaded lampholder. Carefully
press lamp against the spring-loaded lampholder. Align upper lamp pin with stationary lampholder. Slowly ease the
pressure until lamp is fully seated in lampholders.
8. Verify that the lamp is properly seated.
9. Repeat until all lamps have been properly installed.
10. Moisten a clean, lint-free cloth with denatured alcohol and wipe each lamp.
11. Clean the outer surface of duct around cutouts.
12. Fit the Air Duct Disinfection Systems into duct, align with the mounting hardware locations. (You must use a
minimum of 4 screws)
13. Insert No.18 x 1/2” or No. 8-8 x 1/2”, depending on the modeled ordered, mounting hardware into each of the
marked centers, screw in approximately half their length.
14. Finish tightening hardware.
15. Apply warning labels, in a conspicuous location, near the unit and at the air handler. Clean duct surface before
applying warning labels.
16. Plug Air Duct Disinfection Systems into properly grounded, electrical outlet. If unit is supplied without a plug for
direct wiring, connect wire leads to appropriate power connections. All wiring must comply with applicable state,
local and national electrical and mechanical codes.
Do not operate without proper electrical ground
!
WARNING
!
WARNING
Avoid exposure to direct or reflected germicidal ultraviolet rays.
Germicidal ultraviolet rays are harmful to the eyes and skin.
!
!
!
!
!
!
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IND-HVAC-DTW-UVC-R1-SS series
17. Restore power to HVAC system.
18.
19.
!
Verify operation by viewing lamps through sight glass assembly and lamp operation indicators. If the
unit is not operating properly, go to “Troubleshooting” section on page 19.
While wearing protective eye wear, inspect HVAC system for any ultraviolet light leakage. No
ultraviolet light should be visible from any duct opening, joint, seam, or the unit itself. The installation
should also be inspected using a sensitive ultraviolet meter, to ensure that the ultraviolet radiant
exposure of personnel/occupants is within acceptable limits.
20. If necessary, seal any openings, joints, seams, etc. using aluminum tape or equivalent ultraviolet resistant material.
SIGHT GLASS LOCATION & INSTALLATION
IN ORDER TO PERFORM THIS TASK, BE SURE TO WEAR THE FOLLOWING SAFETY
EQUIPMENT: SAFETY
GLASSES OR A FACE SHIELD, AS WELL AS GLOVES.
!
CAUTION
Mechanical hazard. Duct sheet metal has sharp edges. Wear protective gloves when
working on or around duct sheet metal
!
The Air Duct Disinfection Unit comes standard with a 1 or 2-inch Sight Glass Assembly (depending on your modle),
which is installed separately. The ultraviolet blocking sight glass allows for a safe visual inspection of the lamps,
without the need to remove the unit from the duct.
1. Select a suitable location near the Air Duct Disinfection Unit installation.
2. Mark the centers of the mounting holes and clearance hole for the sight glass.
3. Cut out the opening for the sight glass. Remove burrs and sharp edges where possible.
4. Using the supplied No.8-18 x 3/8” long hardware, mount the sight glass assembly to the duct.
PRECAUTIONS To guard against injury, basic safety precautions should be observed.
!
WARNING
•Procedures MUST be adopted to ensure that the Air Duct Disinfection Unit is disconnected from power whenever
personnel work on the HVAC system. Personnel who work in and around the system MUST be briefed on the
precautions to be observed.
•The HV
AC system MUST be re-inspected routinely for any ultraviolet light leakage. (Especially when maintenance
or modifications are performed.)
•If there are any doubts or concerns about the safety or the effectiveness of the installation, or if a sensitive
ultraviolet meter is required, please contact our Application Specialists.
MAINTENANCE Always disconnect power to the unit before performing any service or maintenance.
!
WARNING
•The Air Duct Disinfection Unit is designed to operate with a minimal amount of maintenance.
•A regular cleaning cycle of the germicidal lamps and sight glass should be established,
and carefully maintained, based on inspection and experience. The frequency of cleaning will vary with the
conditions surrounding each installation. It is recommended that the ultraviolet lamps be cleaned at least once
every three (3) months.
•The germicidal ultraviolet lamps used in the Air Duct Disinfection Unit have a manufacturer’s rated effective life
of 10,000 hours. Lamps may operate longer than the rated effective life, but the reduction in ultraviolet output
will make it impractical to use past the manufacturer’s rated life. For maximum efficiency lamp replacement is
recommended every 10,000 hours of operation or about one (1) year of continuous use.
•Unless lamp replacement is due to failure or breakage, it is recommended that all lamps be replaced at the
same time.
•For proper germicidal lamp replacement and cleaning procedure see “Unit and Lamp Installation,
Replacement,or Cleaning” on Page 8.
•Contact Larson Electronics with questions.
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IND-HVAC-DTW-UVC-R1-SS series
MAINTENANCE
Always disconnect power to the unit before performing any service or maintenance.
!
WARNING
•The Air Duct Disinfection Unit is designed to operate with a minimal amount of maintenance.
•A regular cleaning cycle of the germicidal lamps and sight glass should be established,
and carefully maintained, based on inspection and experience. The frequency of cleaning will vary with the
conditions surrounding each installation. It is recommended that the ultraviolet lamps be cleaned at least once
every three (3) months.
•The germicidal ultraviolet lamps used in the Air Duct Disinfection Unit have a manufacturer’s rated effective life
of 10,000 hours. Lamps may operate longer than the rated effective life, but the reduction in ultraviolet output
will make it impractical to use past the manufacturer’s rated life. For maximum efficiency lamp replacement is
recommended every 10,000 hours of operation or about one (1) year of continuous use.
•Unless lamp replacement is due to failure or breakage, it is recommended that all lamps be replaced at the
same time.
•For proper germicidal lamp replacement and cleaning procedure see “Unit and Lamp Installation,
Replacement,or Cleaning” on Page 8.
•Contact Larson Electronics with questions.
BREAKAGE
!
CAUTION
Broken Quartz is SHARP.
Wear protective gloves when handling broken ultraviolet lamp(s). In the event of breakage, DO NOT
use a household vacuum cleaner to pick up quartz fragments. Sweep up debris into a plastic bag and
dispose of properly.
DISPOSAL OF MERCURY ADDED LAMPS
Germicidal ultraviolet lamps, like standard fluorescent lamps contain small amounts of mercury.
Mercury added lamps should not be placed in the trash. Dispose of properly. For further information
regarding the disposal and recycling of lamps containing mercury, along with Federal and State
requirements visit www.lamprecycle.org.
TROUBLESHOOTING
Always disconnect power to the unit before performing any service or maintenance.
!
WARNING
Use personal protection equipment, such long sleeves with no gaps between cuffs and gloves, and
ultraviolet resistant face shield, if troubleshooting Air Duct Disinfection Unit.
IMPORTANT: This unit is to be serviced ONLY by qualified, and appropriately trained and/or licensed personnel.
Table 1 – Troubleshooting
Problem Possible Cause Corrective Action
Unit not operating.
No electrical power. Verify that the unit is connected to a live power
source.
Power connection to xture is loose
or disconnected.
Verify power connection to xture is
fully engaged.
Germicidal lamp not operating.
Germicidal lamp(s) not properly
seated.
Conrm connection between lamp and
lampholder is tight, and that lamp that is
making full contact with lampholder.
Germicidal lamp(s) faulty.
Swap suspect lamp with known good lamp.
If known good lamp does not operate,
replace ballast.
Ballast not functioning. Locate ballast and replace.
Lamp Operation Indicators
(LEDs) not operating. Germicidal lamp(s) out. Check lamp(s) and replace.
!
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