NuAire LabGard NU-581-400 User manual

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LabGard® ES HD Energy Saver
Class II, Type A2 Laminar Flow
Biosafety Cabinet
Models
NU-581-400/500/600
Bench/Console
Operation and Maintenance Manual
December, 2020
Revision 2
Series B,
Manufactured By:
Nuaire, Inc.
2100 Fernbrook Lane
Plymouth, MN 55447
Toll-Free: 1-800-328-3352
In Minnesota: (763)-553-1270
Fax: [phone]

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Congratulations!
You have just purchased one of the finest Laminar Flow Biosafety Cabinets available. With proper care, maintenance
(certification), and laboratory procedure, this cabinet will give you years of product and personnel protection from particulate
contaminants as prescribed in NSF/ANSI 49.Please read this manual carefully to familiarize yourself with proper installation,
maintenance and operation of the cabinet. Other reference and guideline materials are available through the following web sites;
www.hc-sc.gc.ca
www.cdc.gov/od/ohs/
www.absa.org
www.cabs-acsb.ca
www.ebsaweb.eu
www.inspection.gc.ca
www.who.int
www.biosafety.be
www.hse.gov.uk
www.nsf.org
www.cetainternational.org
www.Nuaire.com

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About this Operation and Maintenance Manual
The information contained in this manual is intended to reflect our current production model along with the more frequently
purchased options. Any unique additions, modifications, or shop drawings are appended in the back flap of this manual, along with
any modifications and/or additions to procedures as outlined in this manual. A copy of the original factory test report is also
appended to this manual. In case this manual and/or test report is lost or misplaced, Nuaire retains a copy in our files. A
replacement copy can be obtained by calling or writing Nuaire, Inc. stating the model number and serial number and a brief
description of the information desired.

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LabGard® ES HD Energy Saver
Class II, Type A2 Laminar Flow Biosafety Cabinet
Models NU-581-400/500/600 Operation and Maintenance Manual
Table of Contents
Section No. 1................................................... General Information
Section No. 2................................................... Models and Features
Section No. 3................................................... Warranty
Section No. 4................................................... Shipments
Section No. 5................................................... Installation Instructions
5.1................................................................... Location
5.2................................................................... Set-up Instructions
5.3................................................................... Testing Methods and Equipment
Section No. 6................................................... Operating the NU-581
6.1................................................................... TouchLink™ Control System
6.2................................................................... Operating Guidelines
6.3................................................................... Operating Sequence
6.4................................................................... Ergonomics
6.5................................................................... Cleaning Procedures
Section No. 7................................................... General Maintenance
7.1................................................................... Decontamination
7.2................................................................... LED Lamp Replacement
7.3................................................................... HEPA Filter/Motor Replacement
7.4................................................................... Sliding Window Replacement and Manual Adjustment
7.5................................................................... Airflow Control System Setup and Calibration
7.6................................................................... HEPA Filter Leak test
7.7................................................................... Airflow Smoke Pattern Test
7.8................................................................... Site Installation Assessment Test
7.9................................................................... Cleanliness Classification Test for Pharmacy Application
7.10................................................................. Main Control Board Description and Replacement
7.11................................................................. Digital Airflow Sensor Description and Replacement
Section No. 8 .................................................. Error Messages, Troubleshooting and Option-Diagnostics
Section No. 9................................................... Remote Contacts
Section No. 10................................................. Optional Equipment
10.1................................................................. Ultraviolet Light
Section No. 11................................................. Electrical/Environmental Requirements
Section No. 12................................................. Disposal and Recycle
Manual Drawings
ACD-19747..................................... NU-581 Airflow Schematic
BCD-19748..................................... NU-581-400 Specification Drawing
BCD-19749..................................... NU-581-500 Specification Drawing
BCD-19750..................................... NU-581-600 Specification Drawing
BCD-16509..................................... Auto Decontamination Setup
BCD-11817..................................... Control Center and Front Decorative Panel Assembly
BCD-11686..................................... Sliding Window Assembly and Adjustment
BCD-13923..................................... NU-581 Manual Base Adjustment
BCD-19210..................................... NU-581 Window Assembly Hinge Operation
BCD-12281..................................... Auto Window Switch/Cable Adjustment and Maintenance
BCD-12282..................................... Auto Window Cable and Window Assembly
Electrical Schematics
CD-000053 (sheet 1 and 2)............. NU-581-400/500/600 Electrical Schematic

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LabGard® ES HD Energy Saver
Class II, Type A2 Laminar Flow
Biosafety Cabinet
Models
NU-581-400/500/600
Manufactured by:
Nuaire, Inc. - Plymouth, Minnesota, U.S.A.
1.0 General Information
1.1 Description
The LabGard® ES HD Model NU-581 Laminar Flow Biosafety Cabinet (LFBSC) is a bench/table top model, optionally available
with a base support stand, for operation as a console model. The LabGard® ES model NU-581 utilizes an Energy Saver DC
ECM motor optimally determined forward curved fan for each model size/width to maximize both energy efficiency and
filter loading capacity. The Energy Saver ECM motor is controlled airflow setpoints via a solid-state DC motor controller
with digital dual thermistor airflow sensors that provide an automatic compensation (constant volume control) for both
filter loading and line voltage variances.
The Laminar Flow Biosafety Cabinet, (LFBSC) is a product resulting from the development of the "laminar flow" principle
(see Airflow Schematic) and the application of environmental controls as required in the field of biological research or
(Hazardous Drug) chemical containment. The LFBSC, when used with proper technique, is an effective primary engineering
control in obtaining the optimum product quality while reducing the potential for exposure of both product and personnel
to airborne biological or particulate chemical agents in low to moderate risk-hazard research and drug preparation or
product operations, as prescribed by the Center for Disease Control (CDC) Atlanta, Georgia.
The NU-581 bench LFBSC meets the requirements of a Class II, since the cabinet conforms to the following requirements:
1. Maintains a minimum inflow velocity of 100 LFPM (.51mps) through the work access opening.
2. Has HEPA filtered downflow air that is mixed with the inflow air from a common exhaust plenum.
3. Discharges a percentage of air to the outside atmosphere after HEPA filtration.
4. Has all biologically contaminated ducts and plenums under negative pressure or surrounded by negative pressure.
If working with volatile chemicals, the cabinet must be connected to an external exhaust system with a canopy transition.
Type A2 cabinets may be used for work with volatile chemicals if permitted by a chemical risk assessment.

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1.2 Safety Instructions
These safety instructions describe the safety features of the LabGard® ES HD Model NU-581 LFBSC.
The safety cabinet has been manufactured using the latest technological developments and has been thoroughly tested
before delivery. However, the cabinet may present potential hazards if it is not installed and used as instructed for its
intended purpose or is used outside of operating parameters. Therefore, the following procedures must always be
observed:
•The safety cabinet must be operated only by trained and authorized personnel.
•For any operation of this cabinet, the operator must prepare clear and concise written instructions for operating
and cleaning, utilizing applicable safety data sheets, plant hygiene guidelines, and technical regulations, in
particular.
owhich decontamination measures are to be applied for the cabinet and accessories
owhich protective measures apply while specific agents are used
owhich measures are to be taken in the case of an accident
•Repairs to the device must be carried out only by trained and authorized expert personnel.
•Keep these operating instructions close to the cabinet so that safety instructions and important information are
always accessible.
•Should you encounter problems that are not detailed adequately in the operating instructions, please contact your
Nuaire Representative of Nuaire technical Services.
1.3 Explanation of Symbols
NOTE:
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, may result in property damage.
Potential electrical hazard, only qualified person to
access.
Used for important information.
Biohazard
Ground, Earth
CAUTION

Chemical Hazard
Flammable Hazard
Hazardous Gases! Personal
Protection Equipment Required.
Lead Free
Safety alert symbol indicates a potentially hazardous
situation which, if not avoided, could result in death of
serious injury.
Safety alert symbol indicates a potentially hazardous
situation which, if not avoided, may result in minor or
moderate injury.
WARNING
!
CAUTION
!

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2.0 Models and Features
The model NU-581, LabGard® ES HD Class II, Type A2 Laminar Flow Biosafety Cabinet is manufactured in four sizes:
4 ft. (1.2m)
5 ft. (1.5m)
6 ft. (1.8m)

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3.0 Warranty
Details regarding product warranties can be found in the published warranty data separate from this manual and included
within the data packet sent with the unit.
4.0 Shipments
Nuaire takes every reasonable precaution to assure that your LabGard® ES cabinet arrives without damage. Motor carriers
are carefully selected and shipping cartons have been specially designed to insure your purchase. However, damage can
occur in any shipment and the following outlines the steps you should take on receipt of a Nuaire LabGard® ES cabinet to be
sure that if damage has occurred, the proper claims and actions are taken immediately.
4.1 Damaged Shipments
4.1.1 Terms are factory, unless stated otherwise. Therefore, it is important to check each shipment before acceptance.
4.1.2 If there is visible damage, the material can be accepted after the driver makes a notation on the consignee's copy
of the freight bill. Then an inspection must be made to verify the claim against the carrier. This inspection is the
basis of your filing the claim against the carrier.
4.1.3 If concealed damage is found, it is absolutely necessary to NOTIFY THE FREIGHT AGENT AT ONCE, and request an
inspection. Without this inspection, the transportation company may not accept a claim for loss or damage. If the
carrier will not perform the inspection, an affidavit must be prepared stating that he was contacted on a certain
date and that he failed to comply with the request. This along with other papers in the customer's possession will
support the claim.

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5.0 Installation Instructions
5.1 Location
Within the laboratory, pharmacy, etc., the ideal location of the Biosafety cabinet is away from personnel traffic lanes, air
vents (in or out), doors and/or any other source of disruptive air currents.
Suggested Cabinet Location in Laboratory
THE EXHAUST FILTER AREA IS ESPECIALLY SUSCEPTIBLE TO DISRUPTIVE AIR CURRENTS FROM AIR VENTS. The exhaust
sensor for the Electronic Airflow Control System is located just above the exhaust HEPA filter and if disruptive air currents
are present, the exhaust sensor could be influenced by them, and indicate disruptive readings on the front panel display.
If drafts or other disruptive air currents exceed the inflow velocity of the cabinet through the access opening, the potential
exists for contaminated air to exit or enter the work zone area of the cabinet. It depends on the severity of the air current.
REMEMBER: A BIOSAFETY CABINET IS NO SUBSTITUTE FOR GOOD LABORATORY TECHNIQUE.
Where space permits, a clear 6" (152mm) area should be permitted on each side of the cabinet for maintenance purposes.
The electrical outlet into which the cabinet is connected should be readily accessible for maintenance purposes. Do not
position the cabinet to prevent access to the power cord. The power cord plug serves as the disconnect and should
remain readily accessible. If the outlet is inaccessible, such as a conduit (hardwired) connection, then an appropriate
warning label should be applied near the cabinets on/off switch to indicate the circuit breaker on the power distribution
panel should be used. A MINIMUM CLEARANCE OF 6" (152MM) IS REQUIRED FROM THE TOP OF THE CABINET TO THE
CEILING FOR PROPER VENTILATION OF THE EXHAUST EFFLUX.
If this cabinet is used in a pharmacy application, it is strongly recommended (Per OSHA, NIOSH and ASHP) that the cabinet
be exhausted to the outside. In addition, if this cabinet is used in microbiological application with minute quantities of
volatile toxic chemicals and trace amounts of radionuclides, per CDC/NIH and NSF, it is strongly recommended that the
cabinet be exhausted to the outside. Nuaire offers a canopy type of exhaust transition, which will capture the exhaust efflux
from the cabinet.
Canopy, Thimble or Air Gap Exhaust Transitions.
Note: The Exhaust System should be fitted with a backdraft damper to prevent reversing of airflow in the system.
Nuaire only recommends a canopy or thimble transitions for exhausting applications. See separate instruction sheets for a
discussion of exhaust transitions and installation requirements.


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5.2 Set-Up Instructions
Remove outer shipping protection (carton or crating). The cabinet is fastened to the base skid and it is usually the best
procedure to leave the skid in place until the cabinet is located in its approximate position to facilitate ease in handling. It
can then be removed from the skid by removing the banding, bolts and screws holding the cabinet to the skid. It may be
necessary to remove the control center in order to gain passage through a doorway. It can easily be removed by following
the instructions on drawing BCD-16301.
It is recommended that no less than two people are present using a
lifting system for placement of the cabinet onto the base stand.
It is not recommended to manually lift the cabinet onto the base stand.
5.2.1 Manual Cabinet Height Adjustment (BCD-13923)
To manually adjust the height of the cabinet, remove the outside cover panels on the cabinet base. While
supporting the cabinet base loosen the bolts on the telescoping legs and remove them allowing the leg assembly
to freely move. Place at desired height and reattach bolts and cover panel. Only adjust one side at a time.
5.2.2 Leveling
Using a level placed on the work tray, first adjust the leg levelers end to end and then front to back. The NSF
approved leg levelers provide a ±3/4" (20mm) adjustment.
5.2.3 Drain Valve
If the drain valve is desired, (NOTE, CHECK WITH YOUR SAFETY PERSONNEL FOR REGULATORY REQUIREMENTS OF
DRAIN VALVE INSTALLATION) remove the handle from the valve stem to gain clearance for valve body rotation.
Add Loctite 242 (furnished) to the threads and rotate valve body until secure, with the valve stem (for handle) on
the left side.
5.2.4 Gas Service
Nuaire doesn't recommend the use of natural gas within the LFBSC, but if gas service is determined to be
necessary for the application, appropriate safety measures must take place. All Nuaire LFBSC's have precautionary
warning labels that say the following:
Use of explosive or flammable substances in this cabinet
should be evaluated by your appropriate safety personnel.
Once the determination has been made by the appropriate safety personnel, the application of natural gas must
be performed in accordance to national, state and local codes. IT IS ALSO STRONGLY RECOMMENDED THAT AN
EMERGENCY GAS SHUTOFF VALVE BE PLACED JUST OUTSIDE THE LFBSC ON THE GAS SUPPLY LINE.
All Nuaire’s LFBSC’s meet the safety requirements of UL and CSA for Laboratory Equipment. To comply with these
safety requirements, Nuaire uses only certified gas valves. If external piping is required, only black pipe is used for
this application.
As previously stated Nuaire doesn't recommend the use of natural gas within the LFBSC and ASSUMES NO
RESPONSIBILITY FOR ITS USE. USE AT YOUR OWN RISK. The Bunsen burner flame within the LFBSC not only
contributes to heat build-up; it also disrupts the laminar air stream, which must be maintained for maximum
efficiency. IF THE PROCEDURE DEMANDS USE OF A FLAME, A BUNSEN BURNER WITH ON DEMAND IGNITION IS
STRONGLY RECOMMENDED. DO NOT USE CONSTANT FLAME GAS BURNERS. During use, the Bunsen burner
should be placed to the rear of the workspace where resulting air turbulence will have a minimal effect.
CAUTION
!
CAUTION
!

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5.2.5 Plumbing Services
Service ball valves with the type of service specified by the removable button on the handle are located in the
work zone. The service ball valves are not recommended for pressure over 75 p.s.i. (5.2 BAR). Reducing valves
should be installed external to the cabinet if necessary. Service ball valves should never be used for flammable
gasses or oxygen service. A special needle valve for oxygen service or certified valve is required and available upon
request.
External connection is to 3/8 inch NPT coupling in the inner sidewalls. Connection to plant utilities should be made
with proper materials for the individual service and according to national and/or local codes. Observe all labels
pertaining to the type of service and operating pressure.
5.2.6 Electrical Services
The NU-581 series Biosafety Cabinets may be "hardwired" (optional) or plugged into an outlet with
protective earthing connection with the standard power cord.The cabinet requires 115 VAC, 60 Hz, single phase
(current rating varies per cabinet size, reference Electrical/Environmental Requirements). It is recommended that
power to the cabinet, whether hardwired or plug connected, be on its own branch circuit, protected with a circuit
breaker at the distribution panel near the cabinet.A surge protector is strongly recommended if you are
experiencing power related faults.
NOTE: THIS CABINET CONTAINS ELECTRONIC BALLASTS FOR THE LED LIGHTING. ELECTRONIC BALLASTS
OPERATE WITH HIGH INRUSH CURRENT. IT IS NOT RECOMMENDED TO USE THIS PRODUCT WITH
GROUND FAULT CIRCUIT INTERRUPTERS (GFCI’S) BECAUSE THE BALLASTS MAY CAUSE THE GFCI TO
TRIP.
5.2.7 Final Assembly
NOTE: Remove the protective cardboard cover over the exhaust HEPA filter.
Remove the protective cardboard cover over the exhaust HEPA filter located under the protective screen if in
place. The exterior surface and viewing glass are easily cleaned with any mild household detergent cleaner using a
soft cloth. Harsh chemicals, solvent-type cleaners and abrasive cleaners should not be used.
Do not attempt to clean the HEPA filter media. Cabinet interior walls or work surface are easily cleaned with any
mild household detergent cleaner using a soft cloth. Turn the cabinet on and let it operate for 60 minutes before
using it as a LFBSC.

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5.3 Testing Methods and Equipment
After installation and prior to use, Nuaire recommends that the cabinet be tested or commissioned to factory standards.
As part of testing, the certifier should go through the following initial checklist to assure all aspects of the LFBSC installation
are complete and ready for testing.
•Review product installation
- Exhaust connection, if present
- Damper valve installed correctly, if present
- LFBSC base stand level
•Verify Airflow Sensor shroud is in place
-Downflow
-Exhaust flow
•Perform LFBSC certification
- At a minimum, the following tests should be performed:
•HEPA filter leak test
•Downflow velocity test
•Inflow velocity test
•Airflow smoke patterns
•Site installation assessment tests
The testing methods and equipment required are specified on the factory inspection report included with this manual (see
insert in back cover).
NOTE: IT IS RECOMMENDED THAT THESE TESTS BE PERFORMED BY A QUALIFIED TECHNICIAN WHO IS FAMILIAR
WITH THE METHODS AND PROCEDURES FOR TESTING BIOSAFETY CABINETS (SEE INSERT).
NOTE: AFTER THE INITIAL CERTIFICATION, NUAIRE RECOMMENDS THAT THE CABINET BE RECERTIFIED AT A
MINIMUM OF AN ANNUAL BASIS AND AFTER EVERY FILTER CHANGE, MAINTENANCE ACTION, OR ANY
TIME THE OPERATOR FEELS IT IS NECESSARY.
Note that the LabGard® ES HD cabinets, filters and seals provide premium performance; Quality Control in both design and
manufacturing assure superior reliability. However, protection to both product and operator is so vital that installation
testing to the performance requirements should be accomplished as stated to ensure Biosafety established by the factory
standards.



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LabGard™ ES HD Energy Saver Class II Type, A2 Laminar Flow Biosafety Cabinet
Models NU-581-400/500/600
Catalog Number
Catalog Number
NU-581-400
Nominal 4 foot (1.2m)
NU-581-500
Nominal 5 foot (1.5m)
NU-581-600
Nominal 6 foot (1.8m)
Performance Specifications
1. Personal Protection
2. Product Protection
NSF/ANSI 49 NSF/ANSI 49 NSF/ANSI 49
NSF/ANSI 49
Class II, Type A2
Class II, Type A2
Class II, Type A2
Style of Cabinet
Console
Console
Console
Cabinet Construction Pressure Tight Design
All welded stainless steel
16GA, Type 304
14GA HRS Base
All welded stainless steel
16GA, Type 304
14GA HRS Base
All welded stainless steel
16GA, Type 304
14GA HRS Base
Diffuser for Air Supply (Metal)
Non-flammable
Non-flammable
Non-flammable
HEPA Filter Seal Type:
Supply Filter-99.99% Eff. on 0.3 microns
Exhaust Filter-99.99% Eff. on 0.3 microns
Wedge Prefilter-99.97% Eff. on 0.3 microns
HEPEX Seal
Neoprene
Neoprene
HEPEX Seal
Neoprene
Neoprene
HEPEX Seal
Neoprene
Neoprene
Fumigation : per NIH/NSF Procedures
Yes
Yes
Yes
Standard Services:
Service Coupling (3/8 inch NPT)
Gas Valve/Service Coupling (3/8inch NPT)
Duplex Outlet
One, Right Sidewall
One, Right Sidewall
Two, Backwall
One, Right Sidewall
One, Right Sidewall
Two, Backwall
One, Right Sidewall
One, Right Sidewall
Two, Backwall
Optional Services:
Gas Cocks 3/8" NPT
Ultraviolet Light
Up to 3 ea. Sidewall
One, Backwall
Up to 3 ea. Sidewall
One, Backwall
Up to 3 ea. Sidewall
One, Backwall
Cabinet Size Inches (mm):
Height (Fully Assembled) Min / Max
Height (Minimum for Transport)
Width
Depth (with Control Center)
And Armrest Removed
86 7/8 (2207) / 92 7/8 (2359)
79 3/8 (2016)
54 7/8 (1394)
33 (838)
86 7/8 (2207) / 92 7/8 (2359)
79 3/8 (2016)
66 7/8 (1699)
33 (838)
86 7/8 (2207) / 92 7/8 (2359)
79 3/8 (2016)
78 7/8 (2003)
33 (838)
Work Access Opening Inches (mm):
Standard Opening Height/Optional
Standard Inflow Velocity
10 (254) / 8 (203)
105 FPM (.53 m/s)
10 (254) / 8 (203)
105 FPM (.53 m/s)
10 (254) / 8 (203)
105 FPM (.53 m/s)
Work Zone Inches (mm):
Height
Width
Depth measured at 10 inches (254mm)
window height
28 1/2 (724)
46 3/8 (1178)
26 (660)
28 1/2 (724)
58 3/8 (1483)
26 (660)
28 1/2 (724)
70 3/8 (1788)
26 (660)
Viewing Window Inches (mm):
Standard is safety plate sliding glass
Fully closed to
18 (457) open
Fully closed to
18 (457) open
Fully closed to
18 (457) open
Required Exhaust CFM/CMH
Standard/Optional:
Canopy Variable Flow Thimble (NU-911)
Canopy Fixed Flow Thimble (NU-916)
10(254) / 8(203) opening
CFM (CMH)
363-588 (617-1000) /
295-520 (502-884)
426 (724) / 359 (610)
10(254) / 8(203) opening
CFM (CMH)
451-676 (766-1149) /
365-590 (621-1003)
531 (902) / 445 (756)
10(254) / 8(203) opening
CFM (CMH)
538-763 (915-1297) /
436-661 (741-1124)
634 (1071) / 552 (904)
Plant Duct Static Pressure Eng./Metric
0.05-0.1"/1.27-2.54mm H2O
0.05-0.1"/1.27-2.54mm H2O
0.05-0.1"/1.27-2.54mm H2O
Heat Rejected, BTU, Per Hour
(non-vented)
(vented)
2669
157
2983
198
3140
198
Electrical:
Volts, AC 60 Hz
+Amps: Blower/Lights (10/8 openings)
Amps: Duplex
Rated Amps:
12 ft. Power Cord (one)
U.L./U.L.-C Listed
115
6.0 / 5.8
3
14
12 GA - 3 Wire, 20A
U.L./U.L.-C Listed
115
6.4 / 6.2
3
14
12 GA-3 Wire, 20A
U.L./U.L.-C Listed
115
6.6 / 6.4
3
14
12 GA-3 Wire, 20A
Crated Shipping Weight:***
Net Weight
750 lbs. /340 kg.
700 lbs. /318 kg.
840 lbs. /381 kg.
790 lbs. /358 kg.
930 lbs. /422 kg.
880 lbs. /399 kg.
***Crated shipping weight does not include weight for accessories or options
+ Based on cabinet with new filters running at 115VAC.

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6.0 Operating the NU-581
6.1 TouchLink™ Control System
6.1.1 Overview
The Biosafety Cabinet Control (BSCC) system is designed to service the control requirements of the NU-581
Biosafety Cabinet. The control system is a self-contained microprocessor driven module that will perform the
following functions:
•Easy user interface via TOUCHLINK LCD
•Control DC ECM motor/blower via solid state DC motor controller
•Monitor, display and control downflow, via digital dual thermistor airflow sensor
•Monitor and display exhaust flow (inflow) via digital dual thermistor airflow sensor
•Alarm setpoints, high/low for error conditions (downflow and exhaust flow)
•Date/Clock display and timer function
•Control lights via solid state switch
•Control outlets via solid state switch
•Complete diagnostic functions
The NU-581 TOUCHLINK Control system offers the latest dual microprocessor design technology for improved
cabinet performance and safety. The control system uses a digital dual thermistor airflow sensor in the downflow
stream to monitor and control airflow to setpoints. The control system automatically compensates for filter
loading, voltage variances and other environmental effects. A second digital dual thermistor airflow sensor in the
exhaust airstream monitors for inflow velocity. Both downflow and inflow are displayed on the TOUCHLINK LCD
screen. The control system also monitors the sliding window position with a micro switch for both window high,
low and window closed positions.
The control system through the use of the front panel controls the on/off function of the LED and ultraviolet lights
(optional), outlets and DC ECM motor/blower. The control system also allows contact closure outputs for
interaction with HVAC systems to optimize environmental performance.
User interface to the BSCC system is accomplished via the TOUCHLINK LCD. Basic use of the BSC is accomplished
via the icons located along the top of the screen as shown below. Touch an icon to turn on/off functions as
indicated. Each icon will illuminate with color to indicate when the function is turned on. The menu icon will
always prompt a menu screen to display. Selecting a menu item will continue the prompts until the desired
parameter is achieved. To return to the main menu screen, press the MENU icon repeatedly to reverse out of the
parameter menus. To return to the home screen, press the home icon.
HOME
SCREEN
BLOWER
UV
LIGHT
FL
LIGHT
OUTLET
MENU

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6.1.2 Standby Mode
When the BSC is not in use, the TOUCHLINK LCD screen will display Standby, the icons along the top and the time
and date at the bottom as shown below. Any of the function icons, except the blower, that initiates Run Mode,
may be turned on and off in standby mode. The menu icon may also be accessed for additional user menus.
6.1.3 Run Mode
Any time the blower icon is selected the RUN MODE screen will appear. The Run Mode screen will display airflow
setpoints and warm up with a 2 minute countdown timer. However, the aseptic cleaning process may begin if the
sliding window is raised an audible and visual alarm will occur but may be silenced by pressing the alarm silence
icon that appears. Once the warm-up period is complete, airflow readings and all system functions will operate
and be displayed.

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6.1.4 Night Setback/ Nite Care Mode
The NU-581 may be optionally configured to allow the DC ECM motor to continue to run at a lower rate with the
sliding window closed allowing the workzone interior to be continually HEPA filtered. If the night setback mode is
configured, the blower icon must be on and the window closed for it to be activated. In addition, the light will be
disabled. If the sliding window is then opened the cabinet will resume normal airflow setpoints in run mode.
6.1.5 Standby/Run Mode Alarms
If present standby/run mode alarms will be both visual and audible, the Red LED oval under the LCD display will
turn on, and the TOUCHLINK LCD screen will also display a description of the alarm. Audible alarms can be silenced
or will produce an alarm tone for 10 seconds, then into a ring back cycle of once every 2 seconds. Pressing the
alarm silence icon will silence the audible alarm for 15 minutes then into a ring back cycle of once every 2 seconds
Alarm Types
The middle of the display just below the icons is the message area that will indicate alarms, errors or other notable
conditions. Since the message area is limited to one line of text, only the highest priority message will be
indicated. However, for alarm conditions, also displayed is a caution symbol and pressing it will display all present
alarm conditions. The list below represents the highest to lowest priority.
•Runtime Failure
•Power Loss Alert
•Downflow Sensor Error
•Inflow Sensor Error
•Exhaust Sensor Error
•Downflow Sensor Communication
•Inflow Sensor Communication
•Exhaust Sensor Communication
•Downflow Low Limit
•Downflow High Limit
•Inflow Low Limit
•Inflow High Limit
•Exhaust Low Limit
•Exhaust High Limit
•Cabinet Pressure Low
•Window High
•Window Low
•Replace Filter
•Replace UV Lamp
•Recertification Past Due
•Recertification Due In (x) Week(s)