NuAire LabGard NU-581-400 Operation And Maintenance Manual
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NuAire LabGard NU-581-400 Operation And Maintenance Manual

Es hd energy saver class ii, type a2 laminar flow biosafety cabinet
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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: (763)-553-0459
OM0302
Page 1 of 107

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Summary of Contents for NuAire LabGard NU-581-400

  • Page 1 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: (763)-553-0459 OM0302 Page 1 of 107...
  • Page 2 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 OM0302 Rev 2/December 2020 Page 2 of 107...
  • Page 3 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.

  • Page 4: Table Of Contents

    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.
  • Page 5 Biosafety Cabinet Models NU-581-400/500/600 Manufactured by: Nuaire, Inc. - Plymouth, Minnesota, U.S.A. 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.
  • Page 6 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 Safety alert symbol indicates a potentially hazardous WARNING situation which, if not avoided, could result in death of serious injury.
  • Page 7 OM0302 Rev 2/December 2020 Page 7 of 107...
  • Page 8 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) OM0302 Rev 2/December 2020 Page 8 of 107...
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  • Page 12 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.

  • Page 13: Location

    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.

  • Page 14: Set-Up Instructions

    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:...
  • Page 15 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.

  • Page 16: Testing Methods And Equipment

    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.
  • Page 17 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 NU-581-500 NU-581-600 Nominal 4 foot (1.2m) Nominal 5 foot (1.5m) Nominal 6 foot (1.8m) Performance Specifications NSF/ANSI 49 NSF/ANSI 49 NSF/ANSI 49 1.

  • Page 18: Touchlink™ Control System

    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: •...
  • Page 19 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.
  • Page 20 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.
  • Page 21 6.1.6 Menu Icon The menu icon, when pressed will provide a list of menu items for various TouchLink functions. 6.1.6.1 Setpoint /Limits: Setpoint /Limits: This menu screen will indicate the Biosafety Cabinet airflow control setpoints, Access is restricted to service personnel requiring a service password to change values.
  • Page 22 6.1.6.2 Timer Settings: This menu screen indicates functional timer options. A description of each timer function is provided below. Pressing the time area on the menu will bring up an keypad for time entry for each function. Timer Functions  Purge Timer: This timer controls how long the blower will run to purge the cabinet after the blower icon has been pressed to turn OFF the blower.
  • Page 23  Outlet Timer: This timer controls how long the outlet remains on after the outlet icon has been pressed to turn on the outlet. If timer is zero, the outlet will stay on until turned OFF.  UV Light Timer: This timer controls how long the UV light will remain on after the UV light icon has been pressed to turn on the UV light.
  • Page 24  Auto Run Timers: This timer provides the ability to program on a daily basis the start and stop time of the cabinet. To start and stop the cabinets menus that both the blower and LED lights will automatically turn on and off together on a programmed schedule.
  • Page 25 6.1.6.3 Historical Performance: When press a historical performance text, the system displays downflow and inflow history Downflow History: press downflow history, the system displays the week log data in graphical form of downflow versus days. OM0302 Rev 2/December 2020 Page 25 of 107...
  • Page 26 Inflow History: press downflow history, the system displays the week log data in graphical form of Inflow versus days OM0302 Rev 2/December 2020 Page 26 of 107...
  • Page 27 6.1.6.4 Display settings: This menu item provides the ability to alter display features and set date/time. Display Background colors of White, Green, Blue and Gray can be selected. Touch display tone audible feedback can turn on/off. Display brightness can be adjusted. Languages may be selected of English, Spanish, French and German. OM0302 Rev 2/December 2020 Page 27 of 107...
  • Page 28  Time/Date: This menu item provides the ability to set the time and date displayed on the LCD screen. Time displayed is real time and will not automatically adjust for day light saving time. 6.1.6.6 Change User Password This menu item provides the ability to change the user password from the default value of 1234. ...
  • Page 29  Set New Password  Retype new password OM0302 Rev 2/December 2020 Page 29 of 107...
  • Page 30 6.1.6.7 system information This menu item provides the cabinet model number, serial number, and software revision. 6.1.7 Power Window Option The power window option, if purchased, is factory installed and the display will indicate window up and down icons on the lower right side of the display. The power window function uses a 24 Vdc motor and internal feedback encoder to determine position.

  • Page 31: Operating Guidelines

    6.2 Operating Guidelines The intent herein is to present general operational guidelines that will aid in the use of the Laminar Flow Biosafety Cabinet (LFBSC) to control airborne contaminants of low to moderate risk as stated in Technical Report Number FPS 56500000001, prepared by Dow Chemical U.S.A.
  • Page 32 6.2.4 Utilize Unidirectional Air Flow The operator must keep two important facts in mind: (1) The air, as supplied to the work area through filters from the top, is contaminant free and (2) Airborne contamination generated in the work area is controlled by the unidirectional flow of parallel air streams in a top-to-bottom direction.

  • Page 33: Operating Sequence

    6.3 Operating Sequence 6.3.1 Start Up Turn on cabinet blower and lights, check air intake and exhaust portals of the cabinet to make sure they are unobstructed. The electronic airflow control system will automatically control airflows to specified setpoints. However, upon filter loading, the cabinet may be required to be re-balanced or filters replaced. Only a qualified maintenance technician should perform cabinet balancing and filter replacement.
  • Page 34 6.3.5 Perform Work The work can now be performed. The technician performing the work is encouraged to wear a long-sleeved gown with knit cuffs and rubber gloves. This will minimize the shedding of skin flora into the work area and concurrently protect the hands and arms from viable agent contamination.

  • Page 35: Ergonomics

    Further information is available at the following: http://www.parrinst.com/wp- content/uploads/downloads/2011/07/Parr_Stainless-Steels-Corrosion-Info.pdf NOTE: Nuaire does not offer any product warranty with respect to cleaning material compatibility. USE AT YOUR OWN RISK! The information provided above is from raw material suppliers and known general source documents for use to develop application cleaning SOP’s.
  • Page 36 6.6 Hazardous Drug Decontamination Procedures This procedure is intended to provide guidance following a spillage and/or periodic maintenance, testing or relocation of the cabinet. Additional guidance can be provided by the CETA document CAG-005-2007 found at the CETA website: www.CETAinternational.org. 6.6.1 Preparation Prior to beginning decontamination activity, personnel should wear proper personnel protection equipment (PPE)

  • Page 37: Decontamination

    General Maintenance All maintenance actions on this equipment must be performed by a qualified CAUTION technician who is familiar with the proper maintenance procedures required for this equipment. This includes both certification as well as repair. 7.1 Decontamination No maintenance should be performed on the interior of the LABGARD ES cabinet (area behind access panels) unless the cabinet has been microbiologically decontaminated, is known to biologically clean, or known to be chemically inert.
  • Page 38 AUTO DECON-H2O2/CD. The Auto Decon process requires the use of Front and Top Seal Plates. Seal plates for BSC’s are sometimes part of auto decon process kits from decon process system. Nuaire also offers custom solutions for multiple cabinet sites. Please contact Nuaire Technical Service for further assistance.
  • Page 39 7.1.1 Manual Decon 1. Disconnect power to the cabinet. Remove screws at each upper side of the control center and allow the control center to rotate down, resting on the safety straps. Disconnect electrical connectors on left and right sides. (Be sure to note the location of the supply and exhaust sensor wires before disconnecting them from the main board).
  • Page 40 Slow and deliberate motions are necessary when working in the interior of the cabinet, in order to minimize the generation of particulates. Please consult with Nuaire, Inc. about any unique contamination problems. Normally, no preventive maintenance is required on the interior of the cabinet (i.e., the area behind the access panel containing the HEPA filters and motor (blower assembly).
  • Page 41 The cabinet control system may be set up to run simultaneously aiding the decontaminate circulation throughout the cabinet during the entire decon cycle. To validate two decon processes and associated cabinet set up procedure; Nuaire utilized a Bioquell Clarus II H₂O₂ and a Steris X10.
  • Page 42 OM0302 Rev 2/December 2020 Page 42 of 107...
  • Page 43 Determine decontamination system cycle parameters. Note that system parameters will change for process type, as well as cabinet model and size. For validation purposes, a LabGard® ES Model NU-543-600E was set using the following parameters on the Bioquell Clarus II: Pressure Setpoint: -10 Pa Airflow Setpoint:...
  • Page 44 Auto Decon Set Up Select AUTO DECON SET UP to enter the specific Decon cycle parameters. Select DECON FULL CYCLE TIME OM0302 Rev 2/December 2020 Page 44 of 107...
  • Page 45 Select and enter blower turn on times and length of blower run time at each interval as required by the automated decon process used Decon blower duty cycle allows the cabinet blower to run at a lower speed when used during the decontamination process.
  • Page 46 Auto Decon Run To initiate the auto decon run cycle, select and enter AUTO DECON RUN. To prevent unauthorized entry into the auto decon cycle, the password must be entered. The password would be the same as the blower password or defaulted with “1,2,3,4”. OM0302 Rev 2/December 2020 Page 46 of 107...
  • Page 47 Once the password has been entered, the procedure screen will appear. Follow the procedure screen to make final preparations for the auto decon H2O2/CD cycle. Once the cycle has started, it is desirable to let the cycle run until finished. The display will indicate what portion of the cycle it’s in and the time remaining.

  • Page 48: Led Lamp Replacement

    7.2 LED Lamp Replacement The two (T8) LED lamps are cool white and placed external to the cabinet to aid maintenance and minimize heat build-up within the cabinet. The B70 life rating of the lamp is 50,000 hours based on 80,000 switching cycles. To replace a lamp, it is necessary to remove the lamp assembly.
  • Page 49 Clean top edge of prefilter with 70% IPA or similar 6a. Rotate both of the prefilter release clamps 90° cleaner and place wipe in prefilter. Install prefilter seal over the used prefilter. 6b. Pull up and out prefilter of its position and lay on its Side to be placed into bag.
  • Page 50 It is also recommended to apply a very thin layer of silicone grease on the gasket. If gasket is damaged (i.e. torn), replace it (Nuaire part number A-3071-25). Proceed to install HEPA prefilter making sure filter is seated level onto the gasket.

  • Page 51: Hepa Filter/Motor Replacement

    7.3 Secondary HEPA Filter/Motor Replacement The HEPA Filters under normal usage and barring an accident (a puncture), do not need replacement until the efflux velocity cannot be maintained or the access inflow velocity cannot be maintained at 100 LFPM (.51 m/s) (min.). This may permit the average downflow velocity to be as low as 55 LFPM (.27 m/s) as long as no point falls below 20% of the average downflow velocity.
  • Page 52 HEPA filter. Step 4: Filter Installation When installing new filters, USE ONLY NUAIRE SPECFIED FILTERS FOR REPLACEMENT. Description: Primary HEPA Prefilter NuAire Part Number: 980-000023 Efficiency: 99.995% @ 0.3 Micron...

  • Page 53: Sliding Window Replacement And Manual Adjustment

    7.4 Sliding Window Replacement & Manual Adjustment The sliding window replacement is accomplished by removing the front decorative panel, control center, and window glide assemblies. The sliding window adjustment may be required due to everyday use over the life of the cabinet. Both the right and left window glides are adjustable by a set screw and tension screw method.
  • Page 54 7.5.2 Calibration/Service Menu The Calibration/Service menu provides a list of sub-menu items to accomplish all service tasks. For airflow calibration, only the first three sub-menu items are used in the calibration process. 7.5.2.1 Cabinet Type The cabinet type can be verified in the control system and is factory set and shouldn’t require alteration. The cabinet type default information controls unit of measure, setpoints and limits based on the type and size of cabinet.
  • Page 55 Press SET MOTOR TYPE to verify correct setting. Upon a MASTER RESET, the motor type is defaulted to DC ECM Single. The NU-581 Series 1 (115Vac) requires the motor type selected to be DC ECM Single. Always verify motor type when verifying cabinet type. OM0302 Rev 2/December 2020 Page 55 of 107...
  • Page 56 7.5.2.2 Setpoints/Limits The airflow setpoints and alarm limits may also be verified or altered. Typically, these default values are factory set based on the cabinet type, model and size as previously discussed. However, they may be altered in special cases for modified cabinets. The setpoint establishes the airflow values that are to be maintained. The high low limits establish the alarm boundaries from the nominal setpoint.
  • Page 57 The blower speed control system adjusts the cabinet's total volume of airflow while the choke adjusts or balances the exhaust airflow as well as makes up for filter resistance tolerances. Since it has been Nuaire's experience that the filters may not "load" evenly, both adjustments are necessary for proper cabinet performance.
  • Page 58 7.5.3.1 Downflow Calibration Step 1: • Access Calibration/Service menu. Enter Password • • Press SENSOR SETUP menu item to access sensor calibration menu. Step 2: • Press calibrate downflow sensor. If blower was not running, blower will automatically turn on. Run for one minute or until downflow readings are steady. Step 3: •...
  • Page 59 Step 5: • Now, measure the average downflow velocity over the entire workzone using the recommended downflow velocity test grid (see Table 7.0). Step 6: • Press +/- to change the calibrated downflow value to the average downflow velocity just found. Press SAVE to enter the new calibrated downflow value and supply duty cycle (the blower will turn off upon saving the downflow calibration data).
  • Page 60 Step 3: • Now the calibration procedure is complete. Return to the Run Mode using the menu icon to back out of the Calibration/Service menu. Press blower switch to initiate the warm-up cycle Press +/- to change the calibrated exhaust value to the average inflow velocity just found.
  • Page 61 Table 7.0 Recommended Measurement Methods for Cabinet Downflow and Inflow A. Downflow Measurement Recommended Instruments: TSI 8355 Thermo anemometer b. Procedure: Supply filter efflux is measured on a grid, in a horizontal plane 4 inches (102mm) above the bottom edge of the window.
  • Page 62 Alternate Procedure: The alternative procedure to determine inflow velocity uses a thermo anemometer in a constricted window access opening of 3 inches (76mm) with the armrest removed. Inflow air velocity is measured in the center of the constricted opening 1-1/2 inches (38mm) above the work access opening on the following specified grid. Use the correction factor table to calculate the inflow velocity.

  • Page 63: Hepa Filter Leak Test

    7.6 HEPA Filter Leak Test In order to check filter and filter seal integrity, the HEPA filter media and seals must be directly accessible, by the measuring instrument. There are three separate sets of HEPA filters that must be checked: Primary HEPA Prefilter, Secondary HEPA Supply Filter and Secondary Exhaust HEPA Filter.
  • Page 64 A leak is detected when a sustained particle count is over 40 counts per second (for a period of 60 seconds during the total time of the challenge) above the average unchallenged background particle count. 7.6.2 Supply Filter The diffuser plate placed below the HEPA to protect the filter during normal usage may be removed as follows: The diffuser is secured to the cabinet shell by #1/4-20 acorn nuts located immediately behind the front viewing window.

  • Page 65: Airflow Smoke Pattern Test

    Downflow (CFM) + Exhaust (CFM) Concentration (ug/L) # Nozzles x 229 CMH x 100 ug/L Challenge Downflow (CMH) + Exhaust (CMH) Concentration (ug/L) 7.7 Airflow Smoke Pattern Test The airflow smoke pattern test is performed using a smoke source (i.e. smoke tubes) in and around the cabinet workzone and access opening to determine a visual representation of the cabinet’s containment performance.

  • Page 66: Site Installation Assessment Test

    7.8 Site Installation Assessment Tests These tests are performed to verify the sash position, airflow or pressure setpoint where an audible and/or visual alarm will activate to signify unfavorable operating conditions within the Biosafety cabinet and/or the remote exhaust blower, and canopy connection performance.
  • Page 67 cleanliness classification test is performed using a particle counter to measure particle counts within the cabinet workzone. Turn on cabinet and let warm up for several minutes. Turn on particle counter and flush out sample tubing line to remove latent particles. Set the particle counter to measure 0.5 micron or larger particles at the appropriate measuring rate. “Operational Particle Count Test ”...

  • Page 68: Main Control Board Description And Replacement

    7.10 Main Control Board Description & Replacement To access the main control board for fuse or board replacement, remove screws at each upper side of the control center and allow the control center to rotate down, resting on the safety straps. Now the main control board is exposed for service.
  • Page 69 7.10.4 Cabinet Reset The main control board has two software operating resets available for qualified service personnel. The two types are the following: Factory Reset: Resets setpoints and selected option settings. Factory reset should be used in the event the system memory develops an error in operation.
  • Page 70 • Select desired function from menu. Perform either reset function as selected below. • • Once factory reset is complete, return to Calibration/Service menu to enter any options. OM0302 Rev 2/December 2020 Page 70 of 107...
  • Page 71 Once the MASTER RESET icon is pressed, the display screen will remain the same for several seconds Once the reset process is complete the display screen will revert back to the Nuaire logo main menu. At this point the cabinet MUST be turned off to complete the process. Either unplug the cabinet or use the power switch within the control center to turn off the cabinet.

  • Page 72: Digital Airflow Sensor Description And Replacement

    7.11 Digital Airflow Sensor Description & Replacement The airflow sensor function utilizes two thermistors that provide a constant current source. One thermistor is a reference that uses a very low current source. The other thermistor is the airflow measurer that uses a very high current source.
  • Page 73 8.1 Error Message Troubleshooting Guide Error Message Indicator Correction Window Alarm Sliding window is above its standard working Verify standard working height and window micro switch (Window High) height or micro switch is not operating properly. operation. Window Alarm Sliding window is below its standard working Verify standard working height and window micro switch (Window Low) height or micro switch is not operating properly.
  • Page 74 Error Message Indicator Correction Touch Link Display User Touch area’s of display do not Align w/ icons Calibrate display in adjust display brightness screen Interface Clean alarm a see it reoccurs, check line voltage to control Run Time Failure Indicates a temporary microprocessor issue board, replace control board Recertification Reset certification date in calibration /service menu...
  • Page 75 8.2 Calibration/Service Menu 8.2.1 General As with the airflow calibration process, the service menu should only be accessed by a Service Technician that is familiar with the product. Entry into the Calibration/Service functions requires a service password for entry. After pressing the Calibration/Service menu item, a password screen will appear.
  • Page 76 8.2.2 Calibration/Service Menu • The Calibration/Service menu provides a list of sub-menu items to accomplish all service tasks. Each sub- menu item will be described in the following sections • Blower Setup:  The blower setup menu item provides an access to blower options and night setback setup Menu Blower options •...
  • Page 77 • Password Reset The default password is “1234” and may be changed using the password reset. When the blower lockout is off, the blower may be turned on and off without restriction. • Night Setback setup: The night setback setup menu item provides an access to night setback option and night setback Calibration.
  • Page 78 • Night setback calibration The night setback calibration is calibrated as a percentage of the nominal setpoint and should be adjusted during the certification process to the desired level. The default for night set back downflow velocity is 0 fpm (0.15 mps). OM0302 Rev 2/December 2020 Page 78 of 107...
  • Page 79 • Service The service setup menu allows a QUALIFIED TECHNICIAN to configure, calibrate and obtain functional service data. Each parameter submenu will be described as well as the display will indicate present and/or default conditions as shown.  Run Times OM0302 Rev 2/December 2020 Page 79 of 107...
  • Page 80 • UV Light Run Time: UV light run time value. Reset if replacing the UV lamp. • Blower Motor Run Time Blower Motor Run time or enter old value if replacing control board OM0302 Rev 2/December 2020 Page 80 of 107...
  • Page 81  Certification Date This parameter allows the service technician to view and update the current certification date, in addition to notification time period. • Filter Maintenance: This parameter allows the service technician to set the filter status data used to predict filter life availability. Filter status is based on maximum RPM minus the starting RPM (entered by technician) then scaled to current RPM to determine filter percentage availability.
  • Page 82 • Factory Setup • Option Setup The option set up menu allows A QUALIFIED TECHNICIAN to configure several different optional parameters per the menu below. Each parameter sub-menu will be described as well as the display will the default conditions as shown OM0302 Rev 2/December 2020 Page 82 of 107...
  • Page 83  Alarm Set Up o Alarm Silence This parameter allows for the selection of the alarm silence key function. When the alarm silence function is on, all current and future alarms will be silenced for the designated alarm silence time (i.e.
  • Page 84 o Downflow Alarm Time This parameter allows for the selection of time to determine how many continuous seconds of an alarm condition occurs before activating an audible and visual alarm. The time is displayed in seconds with a programmable range from 2 to 12 seconds. ...
  • Page 85 All interlocks are enable/ disabled by a user through the interlock Features screen o UV window interlock: This parameter allows for the selection of the window closed switch to be interlocked with the UV light option. When the window interlock is on, the window must be closed for the UV light to operate. When the window interlock is off the UV light can be turned on regardless of the window position.
  • Page 86 o Blower Window Interlock This parameter allows for the selection of the window closed switch to be interlocked to the blower. When the blower interlock is on, the blower will turn off when the window is closed. When the blower is off, the blower will continue to run when the window is closed.
  • Page 87 o Blower LED Light Interlock This parameter allows for the selection of the LED light option to be interlocked to the blower. When the blower FL light interlock is on, the LED light operation will be interlocked to the blower. When the blower FL light interlock is off, the LED light can be turned on at any time o Blower Outlet Interlock The blower/outlet interlock turns on/off the outlets whenever the blower is turned on/off.
  • Page 88 o Night Setback Window Interlock This parameter allows for the selection of the night setback function to be initiated upon a sliding window closure. Once the sliding window is closed, the LED light will be disabled, and the airflow will be reduced to a percentage of the normal setpoint.
  • Page 89 o Auxiliary relay function This parameter allows for the selection of the AUX relay function. When the AUX relay is on, the AUX relay function will be identical to the fan relay. When the AUX relay function is off, the AUX relay function provides delay On/Off option.
  • Page 90 o Power Window This parameter allows for the power window option to operate. When the power window option is factory installed this parameter will allow the user display menu to indicate the power window up and down icons The power window option functions using a 24 Vdc motor and internal feedback encoder to determine window position.
  • Page 91 • Diagnostics The General input and output diagnostics menu allows A QUALIFIED TECHNICIAN to exercise the control system’s inputs and outputs  Blower/Sensor Diagnostic Blower/sensor diagnostics reports the current blower and sensor function information. OM0302 Rev 2/December 2020 Page 91 of 107...
  • Page 92  Window Diagnostics Read inputs all service technician to exercise or check these input function. The inputs may be checked by altering the input function (i.e. sliding window position) and monitoring the change on the display  Power Window Calibration The power window can be calibrated by the micro switch position within the right window glide assembly for major adjustments.
  • Page 93 Micro Switch Position Micro Switch Function Window Function (approximate values) Max Window Height Stops when activated Top Middle Window High Alarm Continues to travel down for 1/8” (3mm) past switch deactivation Continues to travel up for 1-7/8” (48mm) past switch deactivation Bottom Middle Window Low Alarm (Used only with power window option)
  • Page 94 When the downflow sensor is uncovered, the motor/blower voltage should decrease and airflow readings should be within the calibration range. If the motor/blower voltage does not change, an airflow sensor problem could exist. Please consult with Nuaire Technical Service.
  • Page 95 Remote Contacts The NU-581 has several contact closures for remote sensing of various functions. 9.1 Fan Relay The fan relay contacts are dual normally open contact closure outputs which are activated whenever the blower is turned on. Contact ratings are 250 VAC maximum at 2 Amps. 9.2 Alarm Relay The alarm relay contacts are dual normally open contact closure outputs which are activated whenever an airflow alarm condition occurs.

  • Page 96: Ultraviolet Light

    10.0 Optional Equipment 10.1 Ultraviolet Light Ultraviolet light will injure your eyes. Avoid direct viewing at all times. CAUTION Personnel should not be present when ultraviolet lamp is on 10.1.1 Overview The germicidal ultraviolet is primarily intended for the destruction of bacteria and other microorganisms in the air or on directly exposed surfaces.
  • Page 97 Energies Required to Destroy Some Microorganisms by Ultraviolet Radiation’s (e) Microwatt Microwatt Mold Spores seconds Protozoa seconds per cm/2 per cm/2 Penicillium roqueforti 26,400 Paramecium 200,000(a) Penicillium expansum 22,000 Penicillium digitiatum 88,000 Nematode Eggs 40,000(b) Aspergillus glaucus 88,000 Aspergillus flavus 99,000 Algae 22,000(c)
  • Page 98 11.0 Electrical/Environmental Requirements 11.1 Electrical (Supply Voltage Fluctuations Not to Exceed +/- 10%) *NU-581-400 115 VAC, 60 Hz, 1 Phase, 14 Amps *NU-581-500 115 VAC, 60 Hz, 1 Phase, 16 Amps *NU-581-600 115 VAC, 60 Hz, 1 Phase, 16 Amps *UL/UL-C Listed 11.2 Operational Performance (for indoor use only) Environment Temperature Range:...
  • Page 99 12.0 Disposal and Recycle Cabinets that are no longer in use and are ready for disposal contain reusable materials. ALL components with the exception of the HEPA filters may be disposed and/or recycled after they are known to be properly disinfected. ...
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This manual is also suitable for:

Labgard nu-581-500Labgard nu-581-600

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