Puro Helo F1 Series User manual

User Manual
Helo F1 Fixture
Single UV Light Engine
Helo F2 Fixture
Dual UV Light Engine
Powered by Violet DefenseTM technology
UV Disinfection from Above
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Which Products are Covered by this User Manual
Helo F1 / F1-12 / F1-24
Single UV Light Engine
Helo F2 Fixture
Dual UV Light Engine
The Helo F1 is a UV disinfection fixture with a single
UV Light Engine. It can be installed in configurations
for drop-in ceilings, recessed hard ceilings, or wall/
surface mount and portable/tabletop use. All variants
operate identically and have a 10’ x 10’ coverage area.
This document will refer to this family as Helo F1.
This fixture can be integrated with a Building
Automation System through BACnet or manually
commissioned.
The Helo F2 is a UV disinfection fixture with dual
UV Light Engines. It can be installed in ceilings,
suspended as a pendant, or wall mounted and has
a 12’ x 12’ coverage area.
Like the Helo F1, this fixture can be integrated with
a Building Automation System through BACnet or
manually commissioned.
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Note: The Helo F1-24 is shown with 24”x24” flange
option attached for drop-in grid ceilings.
Other ordering configurations include:
Helo F1-12 with an integrated 12”x12” flange for
recessed hard ceiling installations
Helo F1 for wall mount, surface mount or portable/
table top use

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Safety Warnings
WARNING: TO REDUCE THE RISK OF
FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS FIXTURE TO RAIN OR
MOISTURE.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure that
may be of sufficient magnitude to constitute a risk of
electric shock to persons.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
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Important Safety Notes
Read these instructions prior to operating the fixture. Keep and follow all instructions.
•Heed all warnings. Failure to use the equipment in the manner specified may impair the fixture from providing the
desired protection.
•Plug fixture into a grounded outlet. Ensure proper conditions for operation. The fixture is designed to operate under
normal conditions indoors (temperature 5-40 degrees Celsius, RH less than 80% (non-condensing), at an altitude <2000m
and main supply fluctuations +/- 10% of nominal voltage, over voltage Category II.
•Allow fixture to complete pre-programmed cycles prior to unplugging or shutting off power. This allows it to enter safe mode.
•The Helo F1 is water resistant but not rated for direct spray down.
•Do not allow Helo F2 to get wet or use in or near water.
•Do not block any ventilation openings. Use in accordance with these instructions.
•Do not attempt to open or tamper with the fixture.
•Do not place or store the fixture near any flammable materials or liquids.
•Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades and a third
grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
•Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point
where they exit from the fixture.
•Unplug this fixture during lightning storms or when unused for long periods of time.
•Refer all servicing to the manufacturer if there is any damage to the unit or it is not operating correctly.
•The fixture is designed to operate only when the room is unoccupied. There are redundant safety systems to ensure the
fixture does not activate while the room is occupied as the UV light is not recommended for excessive exposure. If the
sensor in the system fails, the system will shut down.
•Do not look directly at the fixture due to the brightness of the light. UV light does not significantly penetrate standard glass,
therefore, incidental exposure on the other side of a window or wall does not present any significant risk.
•KEEP AWAY FROM CHILDREN

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UV Safety Overview
Given the correct combination of user protocols and the built-in safety features of theHelo fixtures, there are
minimal risks of any harmful effects from using theHelo fixtures.
Recommendations
•If in the vicinity of theHelo fixtures during operation, do not look directly at the light. This is similar to how
one would avoid harmful effects from the sun by not looking directly at it.
•UV light does not significantly penetrate standard glass. It is safe to be behind a window or wall while the unit
is operational.
•Per the built-in safety features described below, the unit is designed to not operate while a room is occupied.
However, operators are instructed in the user manual to have all persons vacate a space before operation.
Further optional protocols, such as signage indicating the UV unit is in operation may be desired.
Safety Features
The Helo fixtures have four primary aspects to their built-in safety features to ensure the safety of anyone
operating or in the vicinity of a unit.
Limited Exposure Risk
Due to the nature of the programming on the Helo fixtures, over a 30-minute cycle time for the fixture, the
actual exposure to UV (if there were no other safety systems in place) would be no more than two seconds of
exposure.
Redundant Safety Systems
EachHelo fixture has a built-in passive infrared (PIR) sensor used to detect motion in a space. The sensor is
programmed to detect individuals walking into the deployment space. The unit will not resume operation of
the cleaning cycle until it has successfully detected the space is free of motion.
Safe Stop
The third layer of protection built into theHelo fixtures is to ensure that if the motion sensor or other
components experience technical issues, the unit will safe stop by cycling the unit off. Theunit will flash red
indicating that one should contact PURO Lighting for technical support. The unit will not resume operation until
the issue detected has been resolved. If unit is non-responsive (i.e. non-operational or no indicator light), contact
PURO Lighting for technical support.
Frequency of Flashes
The Helo fixtures will flash every 6 seconds during operation. Violet Defense, PURO Lighting's technology
partner, collaborated with the Epilepsy Foundation when designing the product to ensure that the frequency of
flashes will not cause any issues for someone with photosensitive epilepsy.
Disclaimer: The Helo fixture is not intended for use as a medical device and people should not be directly
exposed to the light generated by the unit. The actual disinfection rates on a specific space will vary.
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Governmental Guidelines for UV Light Safety
Occupational Safety and Health Administration (OSHA)
The Occupational Safety and Health Administration (OSHA) does not have any mandated exposure limits to
ultraviolet light. OSHA only provides technical guidance regarding protecting employees from ultraviolet laser
exposure. While general information about ultraviolet contained in that guidance is described below, it is
important to note that PURO Lighting does not currently deploy ultraviolet lasers. For more information on
OSHA’s guidelines, visit:
https://www.osha.gov/laws-regs/standardinterpretations/2003-02-26.
Ultraviolet radiation is divided into three regions: UV-A: 315-400 nanometers (nm), UV-B: 280-315 nm, and UV-C:
200-280 nm. UV can be associated with adverse health effects due to prolonged exposure and the wavelength
of light.
According to OSHA’s guidelines, “exposure in the shorter UV-C and longer UV-A ranges seems less harmful to
human skin. The shorter wavelengths are absorbed in the outer dead layers of the epidermis and the longer
wavelengths have an initial pigment-darkening effect followed by erythema if there is exposure to excessive
levels.”
“The hazards associated with skin exposure are of less importance than eye hazards.” Exposure to light may
cause photokeratitis or cataracts.
National Institute for Occupational Safety and Health (NIOSH)
The National Institute for Occupational Safety and Health (NIOSH) recommends limits to exposure determined
by the wavelength of UV light and intensity. NIOSH recommends that the time of exposure to an intensity of
100 microwatts per square centimeter at wavelength 254 nm not exceed 1 minute. Per the programming, UV
exposure from Helo fixtures for a 30-minute cycle is less than two seconds. For more information, view the
recommended standards from NIOSH at:
https://www.cdc.gov/niosh/docs/73-11009/pdf/73-11009A.pdf.
Environmental Protection Agency (EPA)
The Environmental Protection Agency (EPA) is the governmental agency responsible for regulating ultraviolet
light products. It regulates chemical disinfectants along with devices, such as equipment that generates UV
light, used to control pests like bacteria and making antimicrobial claims. The manufacturer of PURO Lighting
products is an EPA-registered company (Facility No. 92142) and is in full compliance with all regulations. For
more information about EPA guidelines, visit:
https://www.epa.gov/safepestcontrol/pesticide-devices-guide-consumers.
Food and Drug Administration (FDA)
The Food and Drug Administration (FDA) only regulates devices that are cl assified as medical instruments,
machines, and devices used to treat diagnosed medical conditions. Therefore, PURO Lighting does not fall
under FDA guidelines. Furthermore, PURO Lighting products do use materials approved by the FDA for use in
food and medical applications.
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PURO HELO F1/HELO F2 USER MANUAL 6 of 14
Manually Commissioned Helo Fixtures
Commissioning
Contact PURO Lighting or your PURO Lighting representative for assistance manually commissioning your Helo
fixtures.
Operational Modes for Manually Commissioned Fixtures
Fixtures ordered for manual commissioning have three primary modes available to users. Fixtures must be
programmed before initial use.
Autonomous Mode: In this mode, once plugged in, thefixtures will automatically activate once the space is
unoccupied and continue disinfection on a regular schedule, adjusting frequency based on level of activity in the
space based on the motion sensor. Users may select the timeout time, which determines how long thefixture
will wait until resuming operation after motion is detected.
Scheduled Mode: In this mode, thefixture will activate at the selected time(s) of day during each 24-hour
period. Users may schedule up to 4 start times each day to operate for a specified run time (i.e. 15 or 30 minutes).
Users may select the motion timeout, which determines how long thefixture will wait until resuming operation
after motion is detected. Thefixture may also be configured to activate a disinfection cycle immediately when it
is powered and then continue with the scheduled operational time(s).
Single Cycle Mode: In this method, users will manually activate thefixture to start a disinfection cycle. The
fixture will then run its pre-programmed cycle (i.e. 15 or 30 minutes) one time before entering safe mode until
power is cycled on and off again. Users may select the timeout time, which determines how long thefixture will
wait until resuming operation after motion is detected.

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PURO HELO F1/HELO F2 USER MANUAL 7 of 14
Manually Commissioned Helo Fixtures
General Operation of Manually Commissioned Fixtures
1. The PURO Lighting Helo F1 and F2 fixtures are designed to be installed approximately 2 meters (~6 1/2 feet)
away from priority areas. See page 12 for additional information on installation methods. Helo fixtures can
effectively kill pathogens up to 4 meters (~13 feet) away, but the length of time necessary to run the fixture
increases proportionately to the distance from targeted area. Reflective surfaces, including standard glass,
will enhance the effectiveness of the fixture as the UV light will reflect off of these surfaces increasing their
germ-killing effects.
2. The fixtures operate at 120V AC at 60 Hz. Once powered on, the fixtures will draw up to peak current for 4
second intervals (3.5amps for Helo F1 and 7amps for Helo F2). Ensure the breaker has available amperage
during operation.
3. The space should be unoccupied during disinfection cycles. Exit the space within 60 seconds for optimal
functioning of the fixture.
4. The fixtures’ redundant safety systems will stop the fixture from operating if motion is detected in the space.
The fixtures will resume operation approximately 60 seconds (unless alternate motion timeout was selected)
after room is unoccupied and no additional motion is detected.
5. The fixtures will run a safety test to ensure proper functioning and that there is no motion detected in the
space. If successful, fixtures will run their pre-programmed operational cycle. See guidelines for more
information on operational modes.
6. Allow the fixtures to complete its entire cycle before unplugging or turning off power to the fixture. This
allows the fixtures to enter safe mode.

•Automatic Mode: The fixture will automatically activate once the space is unoccupied and continue
disinfection on a regular schedule, adjusting frequency based on level of activity in the space based on the
motion sensor.
•Manual Mode: User will manually activate the fixture to start a disinfection cycle. The fixture will then run its
pre-programmed cycle length one time before entering safe mode until power is cycled on and off again.
•Overnight Mode: The fixture will activate a 30 minute disinfection cycle, turn off for 30 minutes, and then
activate a second 30 minute disinfection cycle.
•Four Hour Mode: The fixture will run alternating 1 hour cycles of 2 minutes of cleaning, 8 minute breaks,
followed by 30 minute break over the course of 4 hours. The cumulative cleaning time will be 36 minutes,
but is intended to extend the life of the product.
•BMS Mode: The fixture will operate disinfection cycles similar to that of manual mode. However, the fixture
will have to be activated from within your building automation system software.
NOTE: By default, this mode will have safety features deactivated, however the safety feature can be enabled
in BACnet.
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BACnet Integrated Helo Fixtures
With the building automation system integration capabilities of the Helo fixtures, users have the ability to adjust
the following:
•Operational Modes & Settings: Select operating modes, including type of disinfection cycle and related
selections, such as start time, run time, and motion timeout length, which indicates how long the fixture will
wait to attempt re-activation after motion has been detected
•System Monitoring: Monitor current status of fixtures remotely and troubleshoot operating
•Network Settings: Configure network settings and/or troubleshoot any networking issues
•Metrics: Access data on the fixtures, including number of successful cleaning cycles and runtime over
specified period of time or lifetime of fixture
Helo fixtures integrated to BACnet for Building Automation Systems have five operating modes available to
users that may be enabled and/or adjusted from your building automation control system (see pages 8-9 for
additional information).
*Modes and settings are subject to change. Please contact the team at PURO Lighting if you have any questions.
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Operational Modes and Settings
BACnet Variable Description Options
Operating Mode CMD Set operating mode for the fixture.
See descriptions on page 6.
AI; Manual; Overnight; Four Hour;
BMS
Cleaning Internal Runtime STPT Set the amount of time (in minutes)
the fixture cleans for in manual mode.
Range 10 minutes to 120 minutes
Motion Timeout STPT Sets the number of seconds for
which the fixture will pause when it
detects motion.
Range 15 seconds to 1,800 seconds
Enable Cleaning CMD Manually turn the fixture on/off. 0 = fixture is off
1 = fixture is on
Enable Safeties CMD When safeties are enabled, fixture
pauses cleaning when PIR detects
motion.
0 = Safeties are disabled
1 = Safeties are enabled
Cleaning Schedule Fixture will start cleaning on any
schedules set here. Synchronization
of BACnet time with on-board clock
is recommended. The schedule will
repeat each week on the specified
day and time.
Each day supports a maximum of 8
scheduled times.
Reboot Device CNFG Reboots device
System Monitoring
BACnet Variable Description Options
Real-Time Clean STS Indication of fixture’s cleaning cycle
status
1= fixture finished a cleaning cycle
0 = fixture has not yet completed its
current cleaning cycle
Motion Detected STS Indication of status of PIR sensor 1 = fixture has detected motion
0 = No motion detected
UV Cleaning STS Indication of fixture’s current
operational status
1 = fixture is running/cleaning
0 = fixture is not cleaning
Time Until Clean Remaining time (in seconds) until
the fixture is finished its current
cleaning cycle
Self Test STS Reports any issues with the fixture
that can be detected by on-board
diagnostics
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Network Settings
BACnet Variable Description Options
DHCP CNFG When DHCP is enabled, ethernet settings
are acquired automatically. If the fixture
fails to acquire a DHCP IP address, it will
default to 192.168.1.5. When disabled, enter
your custom settings via the IP Address,
Subnet Mask, and Gateway Objects. Then
reboot the device to apply network
changes.
Enabled/Disabled
MSTP Baud Rate CNFG Sets all network settings back to their
factory defaults. Sets the MSTP baud rate
back to the default (38400) and the MSTP
MAC address to the default (55).
Supported device baud rates:
9600; 19200; 38400; 57600;
76800; 115200
IP Address CNFG If DHCP is disabled, a static IP address can
be set here.
Subnet Mask CNFG If DHCP is disabled, a static subnet mask
can be set here.
Gateway CNFG If DHCP is disabled, a static gateway can
be set here.
Device MAC Address CNFG The ethernet’s MAC address
UDP Port CNFG The UDP port that BACnet uses. Default value: 47808
MSTP MAC Address CNFG Use this to set the MSTP MAC address.
Each device on the network must have a
unique MAC address.
Default value: 55
Metrics
BACnet Variable Description
Successful Cleanings In Last 24
Hours
The number of cleaning cycles that were completed in the most recent
24-hour period
Runtime for Past 7 Days Total run time (in hours) of the fixture over the past 7 days
Runtime for Past 30 Days Total run time (in hours) of the fixture over the past 30 days
Total Runtime (Lifetime Hours) Total run time (in hours) of the fixture over the product’s life
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•Do not use abrasive cleaners to clean the unit.
•To clean the unit, wipe down the metal plates with stainless steel polish using a microfiber cloth.
General Disinfection Guidelines
For most situations, the general cleaning procedures can be used to operate the Helo fixtures. However, there
are special instructions recommended for blood spills, or when certain organisms, such as C. diff are known or
suspected to be present.
1. Complete standard cleaning procedures to remove any visible dirt, grease, or other debris from space.
2. Activate whole room unit per operational instructions above.
3. Upon returning to space, look at indicator light. Solid green light indicates cleaning cycle completed. If motion
was detected prior to observing the indicator light, the indicator light will turn red. If users want to determine
if the unit completed the last cycle, prior to powering off, stand out of range of the motion sensor for 60 seconds.
The light will resume solid green if cycle was completed. Otherwise, it will resume operation.
Cleaning when Blood or Bodily Fluids are Present
UV light has the ability to penetrate liquid blood, which has not formed a dried crust, or bodily fluids up to a 1/16”
thickness as long as there is no tissue or solid material present. Therefore, UV light may be used to help protect
staff before and after traditional cleaning protocols for your facility.
1. Activate the Helo fixture prior to commencing any cleaning procedures. If the blood has already dried, apply
hydrogen peroxide solution prior to running the unit.
2. Utilize normal procedures, including appropriate safety protocols to clean the space, including removal of
blood and bodily fluids.
3. Activate a second cycle of the Helo fixture to target any remaining bacteria and viruses.
Cleaning when C. diff is of Concern
Clostridium difficile (C. diff) is a bacteria that is extremely difficult to kill (hence its name) as it is able to survive in
unfavorable conditions. Furthermore, it is an anaerobic, endosporic organism, which means it can survive
without oxygen and form dormant spores to survive harsh conditions. With the risk of severe illness associated
with C. diff, it is recommended that you use a combination of approaches to reduce the risk of contracting C.
diff in your facility.
1. Utilize your facility’s adopted environmental cleaning and disinfection strategy for dealing with C. diff.
2. Activate the Helo fixture for two consecutive 30-minute cycles at a range of less than one meter for best
results, or up to 2 hours for ceiling mounted units (must have a 30-minute break between two 60-minute
cycles).
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Guidelines for Cleaning the Fixture

Troubleshooting
Sensor Indicators
Each Helo fixture has an indicator light that indicates the operational status of the unit.
Status Indicator Light
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Color of Light Meaning
Flashing Green Unit is ready to begin cleaning when room becomes unoccupied.
Solid Green Unit has successfully completed its cleaning cycle. If unit detects motion, the unit will
change to solid red, even if cycle completed.
Solid Red Unit was interrupted during the cleaning cycle. Cleaning will resume when room becomes
unoccupied again during the programmed times for operation.
Flashing Red One of the safety sensors has detected an issue. Please see troubleshooting section for
further information.
Troubleshooting
1. If the fixture is flashing red, then an issue was detected by the safety sensors. Unplug or power down the unit.
2. Plug the fixture back into the wall or turn on power to unit. Exit the space within 60 seconds.
3. When you return to the space, identify the color of light on the sensor indicator. If fixture is green or solid
red, the fixture is working properly. If unit is still flashing red, contact PURO Lighting technical support.
4. If fixture is non-responsive (i.e. no indicator light showing), please contact PURO Lighting technical support.
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Installations
Drop Ceiling (Helo F1-24 and Helo F2)
The Helo fixtures can be installed in 24”x24” or 24”x48” grid drop ceiling. The Helo F1 fixture is shipped with a
24”x24” flange kit when ordering the Helo F1-24. The Helo F2 fixture is 24” x 6” making it easy to cut into a ceiling tile.
Ensure there is sufficient plenum space for airflow and fixture clearance.
1. Determine the placement in the room for optimal coverage.
2. Remove the existing ceiling tile.
3. Connect power to the Helo fixture. This may include:
• A grounded non-GFI outlet/15 Amp or greater
• A switched outlet
• An outlet with a WiFi or Bluetooth-enabled Smartplug (App required)
4. Position the Helo fixture in the grid ceiling.
5. Insert cut-to-size ceiling tile to sit flush against the Helo fixture.
6. Turn on power to the device.
Cutting a Ceiling Tile to Size
Helo F1-24
1. If installing in a 24” x 24” Grid, no cuts are required
2. If installing in a 24” x 48” Grid, cut the ceiling tile to fit using a box cutter or appropriate tool.
Helo F2
1. Whether installing in a 24” x 24” or 24” x 48” Grid, measure and mark a 5 3/4” section to fit on the ceiling tile.
2. Use a box cutter or other appropriate tool to cut off the 5 3/4” section of the tile.
Hard Ceiling (Helo F1-12 and Helo F2)
1. Determine the placement in the room for optimal coverage.
2. Ensure the is no existing wiring, HVAC, plumbing, structural or other obstructions in the space above the
intended installation area.
3. Measure the opening for the Helo F1-12 or Helo F2 fixture to be installed and carefully cut the ceiling opening.
4. Ensure there is a power drop to connect the fixture. This may include:
• A grounded non-GFI 110V outlet/15 Amp or greater
• A switched outlet
• An outlet with a WiFi or Bluetooth-enabled Smartplug (App required)
• Approved wiring to the fixture from the power panel of the junction box (permit may be required)
5. Mount the Helo fixture in the ceiling.
6. Turn on power to the device.
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Installations
Suspended Pendant (Helo F2)
The Helo F2 fixture can be suspended from the ceiling to an appropriate height using standard lighting
suspen-sion wire. Ensure the ceiling or grid ceiling can support the weight of the Helo fixture.
1. Determine the placement in the room for optimal coverage to suspend the fixture at the desired height.
2. Ensure there is a power drop to connect the fixture. This may include:
• A grounded non-GFI 110V outlet/15 Amp
• A switched outlet
• An outlet with a WiFi or Bluetooth-enabled Smartplug (App required)
• Approved wiring to the fixture from a power panel of junction box (permit may be required)
3. Attach the Helo fixture to the suspension cables
• If suspending a Helo F1 fixture, remove the 24”x24” flange first
4. Turn on power to the device.
Wall Mount (Helo F1 and Helo F2)
The Helo F1 and Helo F2 fixtures are equipped with attach points for a standard 100mmx100mm VESA wall
mount hardware.
1. Determine the placement in the room for optimal coverage and mount the VESA bracket base
2. Ensure there is power available nearby to connect the fixture. This may include:
• A grounded non-GFI 110V outlet/15 Amp
• A switched outlet
• An outlet with a WiFi or Bluetooth-enabled Smartplug (App required)
3. Attach the Helo fixture to the VESA bracket
4. Turn on power to the device.
Portable/Tabletop Use (Helo F1)
The Helo F1 can also be used as a portable or tabletop disinfecting UV light unit.
1. Determine the placement in the room for optimal coverage and ensure the surface is dry and stable
2. Plug in the unit into a non-GFI 110V outlet/15Amp
3. Turn on power to the device.
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Technical Support
Email us at [email protected].
© Copyright 2020 PURO Lighting. All Rights Reserved. PURO, the PURO logo, Helo and Sentry are
trademarks of PURO. All other trademarks are the property of their respective owners. Specifications are
subject to change without notice. This document is for informational purposes only.