Once BioShift Pass-Through UV-C Germicidal Chamber... User manual

BioShift Pass-Through UV-C Germicidal
Chamber - Instruction Manual
This manual provides user guidelines and additional operation
instructions for the Large BioShift Pass-Through UV-C Germicidal Chamber.
(Model 24-0201, 12NC: 929002100323)
For service or parts call your
sales representative, visit our website:
www.once.lighting/uv-c
Or contact us at:
Once Inc.
United States
15255 23rd Ave N
Plymouth, MN 55447
[phone]
[email protected]om
Germany
Am Südfeld 7
49377 Vechta
[phone]
info[email protected]
Poland
Wloclawska 167
87-100 Tourn
[phone]
info[email protected]

TABLE OF CONTENTS
Introduction ................................................................................................................................................ 2
Specications .............................................................................................................................................. 3
Safety ......................................................................................................................................................... 4-5
Installation ................................................................................................................................................... 6
Touchscreen Display ............................................................................................................................ 7-9
Home Screen Components ................................................................................................ 7
Maintenance Screen Components .................................................................................. 8
Settings Screen Components ............................................................................................ 9
Programming ............................................................................................................................................10
Cycle Time .............................................................................................................................. 10
Sleep Timer ............................................................................................................................ 10
Maintenance ...................................................................................................................................... 11-13
Alert Notications / Errors ............................................................................................... 11
Check Lamp Life ................................................................................................................... 12
Order Replacement Lamps and Ballasts ...................................................................... 12
Changing Lamps and Ballasts ........................................................................................ 12
Reset Lamp Life .................................................................................................................... 12
Cleaning .................................................................................................................................. 13
UV-CDoseVerication..........................................................................................................13
Operating .................................................................................................................................................. 14
Warranty ............................................................................................................................................. 15-22
Contact Information .............................................................................................................................. 23

INTRODUCTION
Health and wellbeing is a critical component to sustain an enjoyable life. It’s why the
quality of the air we breathe and cleanliness of the items we touch every day matters.
The germicidal properties featured in the BioShift Pass-Through UV-C Germicidal
Chamber oer a proven and eective way to disinfect and destroy harmful micro-
organisms. The BioShift chamber is designed and approved for industrial and
commercial uses, and is not to be used in residential or home settings.
The BioShift chamber is a sanitation tool made easy to use alongside additional cleaning
eorts. It helps meet a wide range of end-user needs by limiting cross contamination
through the import of pathogens on everyday items like cell phones, eye glasses, tools
and protection gear.
Veried to inactivate common pathogens by a nationally recognized testing laboratory
specializing in antimicrobial, biocidal and virucidal eectiveness, the BioShift chamber
uses UV-C radiation that has been extensively researched for more than 40 years.
Note: All bacteria and viruses tested to date respond to UV-C radiation, however it is mostit is most
eective on hard surface objects.eective on hard surface objects. It may not kill bacteria, viruses and pathogens, in areas of
objects that are not exposed to the proper intensity and duration of UV-C radiation. Thus,
the BioShift Pass-Through UV-C Germicidal Chamber is most eectively used in addition and
as a complement to sterilization products and procedures, and NOT as a replacement.
2

SPECIFICATIONS
Dimensions
Outside 30”wide x 46.5”deep x 72”high (762 x 1180 x 1828 mm)
Weight 375 lbs. (170 kg)
Functional
Operating Power / Current 110V: 785W / 7.2 A, 240V: 755W / 3.3 A
Standby Power / Current 110V: 19W / 175 mA, 240V: 21W / 158 mA
Input Voltage 110-240VAC, 50/60 Hz (voltage uctuation ±10%)
Transient over voltages allowed up to category II
Temporary over voltages allowed to occur on mains supply
Power Connection Connect to branch circuit rated 20A max
Fuse Protection 5x20mm, Slow Blow, 10A, 250V
Note: Disconnect main power supply before replacing fuse.
Débranchez l’alimentation principale avant de remplacer le
fusible.
Environmental
Operating 41°F (5 °C) to 104 °F (40 °C) temperature
Maximum relative humidity 80% for temperatures up to 88°F
(31°C), decreasing linearly to 50% relative humidity at 104° F (40°C)
Note: Under 41°F (5°C) temperature must run warm-up cycle before
disinfecting. See Operating section.
Storage -20 °F (-28 °C) to 140 °F (60 °C) temperature, 10–95% humidity
Note: Allow unit to reach operating temperature before use.
Pollution Degree 2
UV-C Light Source
Germicidal Lamps 40W UV-C Lamps (18)
Output 254 nm UV-C Light
Chamber Components
Controller See Touchscreen Display section.
Emergency Switch Located on both sides and inside the machine, buttons turn
OFF chamber in case of emergency (re, smoke, etc.).
Tray / Reective Liner The tray and reective liner rest inside the bottom of the
chamber and are removable for easy cleaning.
Windows The tempered glass windows are opaque to UV-C.
Germicidal Lamps There are eighteen (18) 40W germicidal UV-C lamps.
Magnet Securely holds doors in closed position while running.
Door Gasket Seals chamber during operation to keep light from escaping. 3

SAFETY
Definition of Symbols
Warning
• It is possible that emissions from this product may interfere with some sensitive
appliances when placed nearby or in the same circuit as those appliances. The
user should be aware of this potential and take appropriate measures to avoid
interference.
• Not all materials are UV-C safe. UV-C rays can cause physical damage to products.
If products are excessively warm when they are removed after cleaning, they may
have been damaged by the UV-C.
• Do not put humans or live animals in the chamber.
• Do not allow children in or near the chamber.
• Do not place ammable liquid(s) in chamber.
Lamps
The lamps inside emit short wave UV-C radiation. Overexposure to direct or reected
UV-C light can cause severe damage to the eyes and skin. Never look into an illuminated
UV-C lamp without proper eye protection. The chamber windows provide a safe way to
view inside chamber without the risk of UV-C exposure.
Use caution when handling and changing lamps, as they are subject to fracturing. The
lamps contain a small amount of mercury, a chemical known to the state of California
to cause birth defects or other reproductive harm. The mercury is contained inside the
lamp and will not be released unless the lamp is damaged. Use appropriate PPE when
handling.
The lamps are sensitive to the oils in human skin, always handle with gloves.
Disposal and Recycling
All components must be disposed of in accordance with state and local laws. Refer to
lamprecycle.org for more information.
4
RISK OF UV
EXPOSURE CAUTION BIOHAZARD

SAFETY
Features
Emergency Stop The safety switch can be found on either side and inside of the
chamber and can be used at any time to stop the operation. Pressing
EMERGENCY STOP disconnects all power.
Open Door(s) BioShift chamber will not operate when the doors are open. The
doors cannot be opened during cycle time unless EMERGENCY
STOP is pressed. Both doors cannot be opened at the same time
unless EMERGENCY STOP is pressed.
Interlock Logic The clean (controller side) door will remain locked until a cycle is
complete.When complete, the clean door will remain unlocked until
the dirty (start button side) door is opened, or a new cycle is started.
If a cycle is interrupted, it will start over at the beginning. The dirty
door will remain locked anytime the clean door is open. Pressing the
EMERGENCY STOP will unlock the dirty side door.
Start Button Illuminates blue when ready to start cycle.
Chamber The sealed chamber is meant to protect users from UV-C radiation.
Window The tempered glass windows are opaque to UV-C.
Controller The controller has a countdown timer which allows the user to
monitor Lamp Life, replacement recommended after 1000 cycles,
3000 hours, or after a failed Dose Verication Test (see Maintenance
section).
5
Note: If the equipment is used in a manner not specied by the manufacturer, the protection
provided by the equipment may be impaired.

6
INSTALLATION
The BioShift chamber can be installed on its own or inside a wall to utilize its pass-
through function. A minimum wall cutout of 30’’ x 72’’ is recommended for installation.
Note: The BioShift chamber can be installed in dry locations only (Pour emplacements secs
seulement). Product is approved for indoor use at an altitude up to 2000m.
1. Use two or more people to carefully slide the BioShift chamber into place. Use
caution when moving, as the chamber can tip. Do not block maintenance or power
access panels when installing.
2. The cross section of wire for power input shall be at least 14 AWG/1.5 mm2. If used,
cables shall be STJ 14 AWG / H05VV-F 3G1.5mm2or larger.
3. A circuit breaker in the building shall be provided as a mains disconnection device.
120VAC power systems shall use a circuit breaker with a minimum current rating
of 15A. 230VAC power systems shall use a circuit breaker with a minimum current
rating of 10A.
4. Connect input power wiring:
a) Choose one of the provided connectors for wire protection. Remove the
appropriately sized knockout on the power access panel at the bottom of the
chamber.
b) Remove four screws to open the access panel.
c) Run wires/cable through provided connector and knockout hole.
d) Fix incoming wires to the terminal block, see connection arrangement below.
e) Fasten wires/cable inside the cabinet with cable ties, make sure the wires are
not under tension.
f) Screw the connector into knockout hole to securely fasten cable.
g) Replace access panel with four screws.
Removal
Always de-energize/disconnect power before moving.

TOUCHSCREEN DISPLAY
The touchscreen display is located on the clean side of the BioShift chamber.
Home Screen Components
(1) Cycle Time Display
(2) Chamber Start / Stop
(3) Chamber Status
(4) Settings
(5) Maintenance
1
3
4
2
5
7

TOUCHSCREEN DISPLAY
Located under the Maintenance Button.
Maintenance Screen Components
(1) View Lamp Life Remaining
(2) Reset Lamp Life
(3) View Lamp Replacement Info
(4) Run 100mJ/cm Dose Test
(5) Run 250mJ/cm Dose Test
(6) Run 1000mJ/cm Dose Test
8
1
4
2
3
5
6

9
1
4
2
3
TOUCHSCREEN DISPLAY
Located under the Home Screen Settings button.
Settings Screen Components
(1) View Set Lamp Cycle
(2) Set Lamp Cycle
(3) Set Sleep Time
(4) Expired Lamp Life
(5) Contact ONCE®
5

10
PROGRAMMING
Cycle Time
The standard and recommended default disinfection cycle is 5 minutes. However, the
cycle time can be customized to better meet facility protocols. Note: The amount of
killing or inactivation by UV-C radiation is proportional to the amount of exposure time.
TO SET CYCLE TIME:
• From the Home screen, choose the Settings button (see Settings Screen
Components).
• Choose the Set Cycle button. Note: The time is set by arrowing up or down,
programmed in MM:SS.
• Once desired lamp life cycle has been chosen, select the check mark to set.
PROGRAMMING ITEMS TO NOTE:
• Controller cannot be programmed if EMERGENCY STOP button(s) are pressed in.
Pressing EMERGENCY STOP button(s) disconnects all power, even to the controller.
• If disconnected from power, the BioShift chamber does not have to be reprogrammed.
Sleep Timer
In order to ensure the longest life, the BioShift chamber will automatically enter sleep
mode after 30 minutes of inactivity. This setting can be changed by following this path:
• From the Home screen, choose the Settings button (see Settings Screen
Components).
• Choose the Sleep Time option and set to desired time.
• Select the check mark to set.

11
MAINTENANCE
Alert Notifications / Errors
An alert symbol will appear in the upper left corner of the Maintenance button when
one of the following occurs:
• UV-C lamps have reached maximum cycle / hours.
• Replacement lamps have been installed and Lamp Life needs
to be reset.
Simply follow the red exclamation point to the source of the issue.
Note: Lamp life remaining will never go negative. Once it reaches zero, it will remain until
Lamp Life is reset.

12
MAINTENANCE
Note: Chamber must be de-energized and included safety glasses or other UV protective
eyewear should be used at all times when performing maintenance. The chamber must be
energized when performing UV-C Dose Verication.
Check Lamp Life
It is important to monitor Lamp Life and replace when necessary. Even though the
lamps have a long default life, they will lose their power over the course of time and
need to be changed. The remaining lamp life is always prominently displayed at the top
of the Maintenance menu (see Maintenance Screen Components).
Order Replacement Lamps and Ballasts
The information required for ordering new lamps include the lamp part number and
ONCE®contact information.This information can be found from the Maintenance screen
under Lamp Replacement Info.
40W UV-C Replacement Lamps 26-0055 / 929002100326
110-240V Replacement Ballast 26-0052 / 929002100325
Changing Lamps and Ballasts
Remove all shelves and de-energize the chamber. To replace lamps, simply twist the
lamp and pull out from its housing. Slide the new lamp in and twist to lock it in place.
Do not use excessive force. It is recommended that all lamps are replaced on 1000 cycle
or 3000 hour intervals, whichever comes rst, or after a failed UV-C Dose Verication.
After lamps have been replaced, press the “Reset Lamp” button in the Maintenance
menu to reset the lamp life counter.
Replace ballasts if replacement lamps fail to provide proper intensity, or if lamps fail to
ignite. Ballasts must be installed according to country, state, and local NEC to the same
standard as shipped from the manufacturer. After de-energizing the chamber, ballasts
are accessed via the maintenance panel located on the side of the chamber.
Reset Lamp Life
• From the Home screen, choose the Maintenance button (see Maintenance Screen
Components).
• Choose the RESET LAMP button.
• Lamp Life will be reset to default unless custom values have been entered in the
Lamp Life Settings menu.

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MAINTENANCE
Cleaning
• Do not use industrial degreasers or strong solvents such as brake cleaners.
• Do not override safety features during maintenance / cleaning.
• When cleaning all reective aluminum surfaces, do not use abrasives, they will
reduce the reectivity.
• Outside: BioShift chamber can be cleaned with a damp towel. Strong solvents
or detergents are not recommended. A typical household cleaning solvent is
recommended.
• Inside: Clean inside chamber walls with ethanol (reagent grade) and a soft towel.
Be careful not to spray or apply chemicals directly on the UV-C lamps. This may
result in total lamp destruction.
• Inspect the aluminum panels, if they appear to be degrading and reducing
reectivity, consider replacing.
UV-C Dose Verification
It is important to regularly verify the UV-C dose output of the BioShift chamber to
ensure proper disinfection. Every 50 cycles or once per month, whichever comes rst,
the operator shall verify that the UV-C dose exceeds a minimum of 100 mJ/cm2in a
short, programmed test cycle. Before proceeding with the Dose Verication, ensure
the chamber has completed a full cycle within the last 5 minutes so that the lamps are
warmed up.With an empty chamber, place a card (below) face-up at the center of one of
the middle trays. On the touchscreen display, select the“100 mJ/cm2DoseTest”button to
start a test cycle. Upon completion of the test cycle, the operator will evaluate the color
development of the center circle. If the center color matches the 100 mJ/cm2region, the
chamber has passed the test. If the color does not match 100 mJ/cm, all the lamps in
the chamber must be replaced. Note: Do not use dose verication as a disinfection cycle.
Replacement 100 mJ/cm2test cards (929002100327) are available from ONCE®
at www.once.lighting/uv-cdosimeter. Do not store cards in direct sunlight.

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OPERATING
1. Ensure power switch is turned on and all Emergency Stop buttons are released.
2. Place objects in chamber following guidelines below.
• Do not stack items / supplies in the chamber.
• Leave 6” between each product in the chamber with no more than 3 across.
• Place the tallest products in the center.
• It is not recommended to put food through chamber unless it is sealed.
3. Press Start Button. When a cycle is started the timer (located on the clean side
controller) will count down. The chamber will turn OFF automatically after
programmed time (recommended 5 minutes).
4. If the BioShift chamber is kept at a temperature under 41°F (5 °C), a warm-up cycle
must be completed before beginning sanitation.
ADDITIONAL OPERATING FUNCTIONS:
• BioShift chamber doors shall not be opened during radiation cycle.
• BioShift chamber doors cannot be open at the same time under normal operation.
• In case of emergency, EMERGENCY STOP button can be pressed from either side.
• If cycle has been interrupted, the cycle will restart at the beginning of the cycle
when pressing the Start button again.
MONITORING:
• Monitoring of inserted material and lamp functions can be done through the
window on either door. Window is made with glass that blocks UV-C radiation.
• Countdown timer shows how much time in radiation cycle is left.
CONTROLLER (CLEAN SIDE):
A. If a door is open, pressing the Start button will not start the machine.
B. If the rear (dirty side) door is open, the wording REAR DOOR OPEN will appear.
C. Upon disinfection cycle completion, CLEAN will appear on the screen with the
option to Start another cycle.

15
WARRANTY
WARNING
IMPROPER USE OR IMPROPER OPERATION OF THIS MACHINE CAN CAUSE SEVERE
DAMAGE, PERSONAL INJURY, VISUAL IMPAIRMENT, AND/OR PERMANENT BLINDNESS.
WHEN OPERATING THIS MACHINE, YOU MUST ALWAYS FOLLOW THE PROPER
PROCEDURES.
The BioShift®Pass-Through UV-C Germicidal Chamber is warranted against defects in
materials and workmanship for two years.
The following defects are specically EXCLUDED:
1. Defects caused by improper operation.
2. Damage caused by accident or misuse.
3. Damage caused by disaster or other acts of God.
4. Corrosion due to use of improper solvents or detergents.
5. Repair or modication performed by anyone other than ONCE®or authorized
person.
6. Use of spare parts supplied by anyone other than ONCE®or authorized person.
Components not covered under warranty:
1. Door Magnets
2. Bulbs/Ballasts
3. Door Gaskets
4. Reective Aluminum Panels
Note: There are no user-serviceable parts or components inside the unit. Unauthorized
service or repair may void the warranty.
For additional warranty terms see the Once®Limited Warranty.
For any inquiry regarding instrument operation, service, parts - contact your sales
representative or email us at [email protected]om with “BioShift UV-C Chamber” in the
Subject line.

16
GARANTIE
AVERTISSEMENT
UTILISER OU MANOEUVRER CET APPAREIL DE FACON INCORRECTE PEUT CAUSER DES
DOMMAGES GRAVES, DES BLESSURES CORPORELLES, UNE DÉPRÉCIATION VISUELLE ET /
OU UNE CÉCITÉ PERMANENTE. LORS DE L’UTILISATION DE CETTE MACHINE, TOUJOURS
SUIVRE LES PROCÉDURES APPROPRIÉES.
Le caisson UV-C passer à travers BioShift est garanti contre les défauts de matériaux et
de fabrication pendant deux ans.Si des défauts surviennent dans le caisson pendant
cette période de garantie, ONCE réparera ou remplacera les pièces défectueuses
gratuitement.
Les défauts suivants sont spéciquement EXCLUS:
1. Défauts causés par une utilisation inappropriée.
2. Dommages causés par un accident ou une mauvaise utilisation.
3. Dommages causés par une catastrophe ou d’autres événements de force majeure.
4. Corrosion due à l’utilisation de solvants ou de détergents inappropriés.
5. Réparation ou modication eectuée par une personne autre que ONCE” ou une
personne non autorisée.
6. Utilisation de pièces de rechange fournies par toute personne autre que ONCE“ou
non autorisée.
Composants non couverts par la garantie:
1. Aimants de porte
2. Ampoules / Ballasts
3. Joints de porte
4. Panneaux rééchissants en aluminium
Remarque: Aucune pièce ou composant à l’intérieur de l’unité ne peut être réparé par
l’utilisateur. Toute réparation non autorisée peut annuler la garantie.
Pour les conditions de garantie supplémentaires, consultez la garantie limitée une fois.
Pour toute question concernant le fonctionnement de l’appareil, le service, les pièces,
contactez votre représentant ou envoyez-nous un e-mail à [email protected]oup avec
“BioShift UV-C Chamber”dans la ligne Objet.

17
ONCE®LIMITED WARRANTY
1. Limited Warranty
• The warranty as described herein shall only apply to BioShift®unit branded products
(hereinafter referred to as “Product”or“Products”).
• Once Innovations, Inc. and aliates of the Signify group of companies (ONCE) warrants
during the term of this Limited Warranty each Product performs without failure and is
free from defects in material and workmanship.
• If a Product fails to operate in accordance with this warranty, ONCE, at its discretion, will
repair or replace the Product or the defective part thereof or reimburse warranty holder
for the purchase subject to the terms and conditions set forth below.
2. Warranty Claims
• All warranty periods mentioned are subjected to a ONCE representative having access
to the failed product or system for verication of non-compliance. Warranty claims have
to be reported in writing and returned to the local ONCE oce within 30 days after
discovery, specifying at least the following information (additional info may be required
on request):
1. Model number of failed product;
2. Installation date and invoice information;
3. Detailed description of problem including: relevant electrical systems, installation
location, and symptoms of failure; and
4. Total hours of use and documented cleaning record.
• Upon request, ONCE representatives shall be granted access to the defective Product,
system or application for verication of non-compliance.
• If requested by ONCE, the non-conforming or defective Products shall become ONCE’S
property as soon as they have been replaced.
• ONCE reserves the right to make the nal decision on the validity of any warranty claim.
3. Additional Terms and Conditions
• The warranty is only applicable to parties purchasing the Products directly from ONCE
or a ONCE authorized dealer or a ONCE authorized distributor.
• This limited warranty is VOID unless the Product has been properly wired, installed and
operated within the electrical values, operating range and environmental conditions
provided in the installation manuals, specications, IEC, NEC and/or any other applicable
local standards.
• Third party products sold by ONCE are not covered under this warranty.
• This warranty does not apply to damage or failure to perform arising as a result of
any Acts of God, including but not limited to hurricanes, lightning strikes, tornadoes,
high winds, ooding or earthquakes, or from any abuse, misuse, abnormal use or use
in violation of any applicable standard, code or instructions for use including without
limitation those contained in the latest safety, industry and/or electrical standards for
the relevant region(s).

18
• This warranty does not apply to damage occurring during transportation of the product
to a Purchaser or nal installation place.
• ONCE warranty AUTOMATICALLY VOIDS for unintended uses.
• This warranty shall be VOID in the event any repairs or alterations not authorized by
ONCE, in writing, that are made to the Product by any person.
• ONCE does not authorize or permit any party, including its agents, distributors or
dealers, to assume for ONCE any other obligations or liability.
• In no event shall ONCE be responsible for removal or reinstallation costs or expenses
including, without limitation, labor costs or expenses, shipping and handling, or return
shipping.
4. Term
• Subject to the provisions of this Limited Warranty, the warranty period shall be two (2)
years from the date of delivery subject to documented cleaning of Products at least
once every three (3) months during the two (2) year term.
5. Limitations and Conditions
• ONCE cannot be held liable for electrical supply conditions, including supply spikes,
over-voltage/under-voltage and Ripple Current control systems that are beyond the
specied limits of the products and those dened by relevant supply standards.
• With respect to products sold to the Purchaser by ONCE but not bearing the ONCE name
or sub-brands, ONCE makes no warranty of any kind, express or implied, including,
without limitation, any warranty of merchantability or tness for a particular purpose,
but can make available to the Purchaser upon request but only to the extent permitted
by law and relevant contracts, the warranties of the manufacturer of the relevant
product.
• To the extent permitted by applicable law, the foregoing shall constitute the exclusive
remedy of the purchaser and the sole liability of ONCE for ONCE Products. No warranty
of merchantability or tness for a particular purpose is made or is to be implied. In
no event shall ONCE be liable for any other costs or damages, including lost prots or
revenues, incidental, special or consequential.
• ONCE has not tested the eectiveness of the BioShift Chamber UV germicidal irradiation
on the surfaces of objects contaminated with SARS-CoV-2 virus. As such, ONCE cannot
and does not warrant that the use the BioShift Chamber will directly or indirectly
prevent or cause to prevent infection and/or contamination with SARS-CoV-2 virus,
COVID-19 disease and/or any other viruses, bacteria, protozoa, fungi, illness and/or
disease for the users of objects that are submitted to UV germicidal irradiation in the
BioShift Chambers and/or for other individuals that may come in contact with the users
of said objects subjected to UV germicidal irradiation in the BioShift Chambers.

• This BioShift Chamber has not been approved and/or certied as a medical device
anywhere in the world. As such, the BioShift Chamber cannot be used to disinfect (the
surfaces of) medical devices such as, without limitation, surgical respirators, surgical
masks and/or other medical device-grade PPE. ONCE shall bear no liability towards any
party if any BioShift Chambers are used to disinfect (the surfaces of) medical devices
and/or in any other way than the intended use as described herein.
• In addition to those limitations and exclusions of liability of ONCE as set forth in any
agreements that ONCE enters, has entered or may have entered into with any party in
relation to the supply, provision, donation and/or otherwise making available of BioShift
Chambers, ONCE explicitly excludes any and all liability towards any party – including,
without limitation, its customers, the users of the BioShift Chambers, the users of the
objects submitted to UV germicidal irradiation in any BioShift Chambers and/or any
individuals that may come in contact with the users of the herein aforementioned
objects – for any and all damages that may arise from and/or in relation with any of
the foregoing disclaimed facts, events and/or circumstances, any use of the BioShift
Chambers outside of the intended use as described herein and/or any use of the
BioShift Chamber that is not compliant with the instructions for use.
Subject to change without notice June 11, 2020
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