Page 1
LabGard® Containment Ventilated Enclosure
Model
NU-813-300/400/600
NU-813-300E/400E/600E
Portable Bench Top
Operation & Maintenance Manual
February, 2019
Series 33
Revision 9
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
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ABOUT THIS OPERATION & MAINTENANCE MANUAL
The information contained in this manual is intended to reflect our current production standard configuration model along
with the more frequently purchased options. Any unique additions/modifications/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® Containment Ventilated Enclosure
Models NU-813-300/400/600
NU-813-300E/400E/600E
Operation & Maintenance Manual
TABLE OF CONTENTS
Section No. 1 ................................................... General Information
Section No. 2 ................................................... Models & Features
Section No. 3 ................................................... Warranty
Section No. 4 ................................................... Shipments
Section No. 5 ................................................... Installation Instructions
5.1 ...................................................... Location
5.2 ...................................................... Electrical Services
5.3 ...................................................... Final Assembly
5.4 ...................................................... Certification Testing Methods and Equipment
Section No. 6 ................................................... Operating the NU-813
6.1 ....................................................... Operator Controls & Indicators
6.2 ....................................................... Operating Guidelines
6.3 ....................................................... Ergonomics
6.4 ....................................................... Cleaning Procedures
Section No. 7 ................................................... General Maintenance
7.1 ....................................................... Decontamination
7.2 ....................................................... Fluorescent Lamp Bulb Replacement
7.3 ....................................................... HEPA Filter Replacement
7.4 ....................................................... Motor/Blower Replacement
7.5 ....................................................... Airflow Calibration
7.6 ....................................................... Filter Integrity Check
7.7 ....................................................... Main Control Board Description and Replacement
Section No. 8 ................................................... Error Messages, Troubleshooting and Option Diagnostics
Section No. 9 ................................................... Polycarbonate Material Compatibility
Section No. 10 ................................................. Remote Contacts
Section No. 11 ................................................. Electrical/Environmental Requirements
Section No. 12 ................................................. Disposal and Recycle
Insert ............................................................... Replacement Parts List
Manual Drawings
ACD-15638 .................................................... NU-813 Airflow Schematic
BCD-18729 .................................................... NU-813/300 Specification Drawing
BCD-18730 .................................................... NU-813/400 Specification Drawing
BCD-18731 .................................................... NU-813/600 Specification Drawing
BCD-16521 .................................................... NU-813 Control Panel
BCD-15639 .................................................... NU-813 Bag-In/Bag-Out Filter Removal Procedure
BCD-15640 (Sht. 1, 2, 3) ................................ NU-813 Assembly Drawings
BCD-17400 .................................................... NU-813 Base Stand Telescoping
BCD-17401 .................................................... NU-813 Base Stand Telescoping with Castors
BCD-15071 .................................................... Fixed Range Duct Canopy
BCD-16968 .................................................... NU-813 Electrical Schematic (115 VAC)
BCD-16969 .................................................... NU-813 Electrical Schematic (230 VAC)
Assembly Drawings
Electrical Schematics
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LabGard® Containment Ventilated Enclosure
Model
NU-813-300/400/600
NU-813-300E/400E/600E
Portable Bench Top
MANUFACTURED BY:
NuAire, Inc. - Plymouth, Minnesota
1.0 General Information
1.1 Description
The LabGard® Containment Ventilated Enclosure (CVE) Model NU-813 is offered as a Class I Containment Enclosure
equipped with a HEPA filter. In the Class I configuration, the NU-813 provides personnel protection for handling low risk
aerosols and particulate matter. Room air enters the Enclosure, flowing past the operator into the work access opening
providing an air barrier which minimizes contaminants generated within the enclosure work zone from migrating into the
room. The air flows through the enclosure carrying contaminants with it, exiting through a HEPA filter.
1.2 Safety Instructions
These safety instructions describe the safety features of the LabGard® Model NU-813.
The CVE has been manufactured using the latest technological developments and has been thoroughly tested before
delivery. It may, however, present potential hazards if it is not used according to the intended purpose or outside of
operating parameters. Therefore, the following procedures must always be observed:
• The CVE must be operated only by trained and authorized personnel.
• For any operation of this unit, 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.
o Which decontamination measures are to be applied for the cabinet and accessories
o Which protective measures apply while specific agents or materials that are used
o Which 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 unit 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 or NuAire Technical Service.
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1.3 Explanation of Symbols
WARNING
!
CAUTION
!
WARNING
CAUTION
CAUTION
WARNING indicated a potentially hazardous
Situation which, if not avoided, could result in
Death or serious injury.
CAUTION indicates a potentially hazardous
Situation which, if not avoided, may result in
Minor or moderate injury.
CAUTION used without the safety alert symbol
Indicates a potentially hazardous situation which,
if not avoided, may result in property damage.
Note:
Potential electrical hazard,
only qualified person to access
Used for important information
Biohazard
Ground, Earth
Lead Free
Flammable Hazard
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Hazardous Gases!
Personal Protection Equipment Required
Chemical Hazard
Page 6
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2.0 Models & Features
The NU-813 comes in three standard size widths: 36" (914mm) (Model-300/300E)
48" (1219mm) (Model-400/400E)
72” (1829mm) (Model-600/600E)
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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® CVE 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® CVE 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 CVE is away from personnel traffic lanes, air vents (in or
out), doors and/or any other source of disruptive air currents.
If drafts or other disruptive air currents exceed the intake velocity of the cabinet through the access opening, the potential
exists for contaminated air to exit the cabinet. It depends on the severity of the air current. REMEMBER: A CONTAINMENT
CABINET IS NO SUBSTITUTE FOR GOOD LABORATORY TECHNIQUE.
Where space permits, a clear 6 inch (152mm) area should be permitted on each side of the enclosure for maintenance
purposes. The electrical outlet into which the CVE 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 to be used.
5.2 Electrical Services
The NU-813 Series CVE may be "hardwired" (optional) or connected via an electrical power cord which is standard. The unit
requires 115 VAC, 60 Hz or 230 VAC, 50 Hz depending upon model, single phase (current rating varies per cabinet size,
reference Electrical/Environmental Requirements). It is recommended that power to the unit be on its own branch circuit,
protected with a circuit breaker at the distribution panel.
5.3 Final Assembly
REMOVE THE PROTECTIVE CARDBOARD COVER OVER THE EXHAUST OUTLET. The exterior surfaces 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.
Cabinet interior walls or work surface are easily cleaned with any mild household detergent cleaner using a soft cloth.
Turn the CVE on and let it operate for 60 minutes before using.
Note: THIS UNIT CONTAINS ELECTRONIC BALLASTS FOR THE 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.
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NOTE:
NOTE:
5.4 Certification Testing Methods and Equipment
After installation and prior to use, NuAire recommends that the CVE be certified or commissioned to factory standards. At
a minimum, the following tests should be performed.
1. HEPA filter leak test
2. Inflow velocity test
3. Airflow smoke patterns
The testing methods and equipment required are specified on the factory inspection report included with this manual (see
insert in back cover).
IT IS RECOMMENDED THAT THESE TESTS BE PERFORMED BY A QUALIFIED TECHNICIAN WHO IS
FAMILIAR WITH THE METHODS AND PROCEDURES FOR CERTIFYING LABORATORY CONTAINMENT EQUIPMENT
(SEE INSERT).
AFTER THE INITIAL CERTIFICATION, NUAIRE RECOMMENDS THAT THE CABINET BE RECERTIFIED AT A
MINIMUM ON AN ANNUAL BASIS AND AFTER EVERY FILTER CHANGE OR MAINTENANCE ACTION OR
ANY TIME THE OPERATOR FEELS IT IS NECESSARY.
Note! LabGard® CVE 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
certification to the performance requirements should be accomplished as stated to ensure safety
established by the factory standards.
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LabGard® Containment Ventilated Enclosure
Catalog Number
Catalog Number
NU-813-300/E
Nominal 3 foot (0.9m)
NU-813-400/E
Nominal 4 foot (1.2m)
NU-813-600/E
Nominal 6 foot (1.5m)
Performance Specifications
2. Product Protection
ANSI/ASHRAE 110
Surrogate Powder
ANSI/ASHRAE 110
Surrogate Powder
ANSI/ASHRAE 110
Surrogate Powder
NSF Std. No. 49 Class
Class I
Class I
Class I
Style of Cabinet
Bench top/console with
optional base stand
Bench top/console with
optional base stand
Bench top/console with
optional base stand
Cabinet Construction
HEPA Filter Seal Type:
Eff. on 0.3 microns
Spring loaded
Spring loaded
Spring loaded
Fumigation per NIH/NSF
Procedure
Cabinet Size Inches (mm):
Width
36 (914)
48 (1219)
72 (1829)
Work Access Opening Inches
Standard Inflow Velocity
Work Zone Inches (mm):
Width
34-3/8 (873)
46-3/8 (1178)
70-3/8 (1788)
Noise: dbA
Running
57
57
62
CFM @ 80 FPM
195 CFM
260 CFM
390 CFM
Electrical: 115V (230V)
12 ft. Power Cord (one)
14 GA - 3 Wire, 15A
14 GA - 3 Wire, 15A
14 GA - 3 Wire, 15A
Crated Shipping Weight: ***
Net Weight
350 lbs. / 159 kg.
300 lbs. / 136 kg.
450 lbs. / 204 kg.
400 lbs. / 181 kg.
550 lbs. / 249 kg.
500 lbs. / 227 kg.
Models NU-813-300/400/600/E
1. Personal Protection
Exhaust Filter-99.995%
Optional Services:
Gas Cocks 3/8" NPT
Height
Depth
(mm):
Standard Opening Height/Optional
NSF/ANSI 49
Polycarbonate panels with
welded blower module.
Neoprene,
Yes Yes Yes
Up to 3 ea. Sidewall
54 (1372)
29 (737)
8 (203)
80 FPM (.40 m/s)
NSF/ANSI 49
Polycarbonate panels with
welded blower module.
Neoprene,
Up to 3 ea. Sidewall
54 (1372)
29 (737)
8 (203)
80 FPM (.40 m/s)
NSF/ANSI 49
Polycarbonate panels with
welded blower module.
Neoprene,
Up to 3 ea. Sidewall
54 (1372)
29 (737)
8 (203)
80 FPM (.40 m/s)
Height
Depth
Viewing window is ¼ in (6mm).
clear polycarbonate
Ambient
Heat Rejected, BTU, Per Hour
(non-vented)
Volts, AC (Hz)
Amps: Blower
Amps: Lights
Amps: Total
***Crated shipping weight does not include weight for accessories or option
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28 (711)
24 (610)
Closed: 8 (203)
Open: 24 (610)
53
265 330 600
115 (230) / 50/60
1.6 (.8)
.2 (.2)
1.8 (1.0)
28 (711)
24 (610)
Closed: 8 (203)
Open: 24 (610)
53
115 (230) / 50/60
1.8 (.8)
.2 (.2)
2.0 (1.0)
28 (711)
24 (610)
Closed: 8 (203)
Open: 24 (610)
53
115 (230) / 50/60
3.2 (1.1)
.4 (.2)
3.6 (1.3)
Page 15
6.0 Operating the NU-813
Figure 1
6.1 Aeromax™ Control System
6.1.1 Overview
The Aeromax™ control system is designed to service the control requirements of the LabGard® ES NU-813 CVE.
The Aeromax™ control system consists of an electronic module that will perform the following functions:
• Easy user interface via LED’s and function keys
• Control blower via solid state switch.
• Control lights via solid state switch.
• Hinged window alarm
• Disable audible alarm switch with ring back function.
• Control blower DC EC Impeller with solid-state DC Motor Controller that provides automatic
compensation for line voltage variances.
• Monitor and display airflow system performance via PresurFlow™ monitor.
The LabGard® ES NU-813 offers the latest digital microprocessor design technology for improved CVE performance
and safety. The Aeromax™ control system integrates a digital pressure sensor (PresurFlow™) to monitor the CVE
airflow performance. The Aeromax™ control system also integrates a DC EC Impeller controller that provides
automatic compensation for both filter loading and line voltage variances. There is additional on/off control of
blower and light. Lastly the Aeromax™ control system monitors the hinged window position with a micro switch.
All the above functions are shown in a system block diagram (see figure 1).
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6.1.2 Front Panel
The control system front panel contains the following functions described in detail (see Drawing BCD-16521).
6.1.2.1 Blower Keys
The blower key controls the ON/OFF power to the blower.
LED above key indicates: full green for blower on,
blinking green for blower pending and
full red for blower alarm.
6.1.2.2 Hidden Key
The hidden key is located just above the blower LED indicator centered in the airflow symbol. The hidden key
is used for various functions including the blower password 3 key sequence if the option is activated.
6.1.2.3 Fluorescent Light Key
The fluorescent light key controls the on/off power to the fluorescent light.
LED above the key indicates full blue for fluorescent light on.
6.1.2.4 Ultraviolet (UV) Light Key (Special Option Feature ONLY)
The UV light key controls the on/off power to the UV light (if optionally installed).
LED above indicates full yellow for UV light on.
6.1.2.5 Outlet Keys (Special Option Feature ONLY)
The outlet key controls the ON/OFF power to the outlets (If optionally installed).
LED above indicates full blue for outlets on.
6.1.2.6 Red Alarm LED
The red alarm LED will indicate any alarm condition and remain indicating until the alarm condition is cleared.
6.1.2.7 Audible Alarm Silence
The audible alarm silence key allows user interaction to silence an audible alarm for a period of 15 minutes.
After 15 minutes if the alarm condition still exists, the audible alarm will again sound.
The audible alarm silence key also is used to exit all Aeromax™ user interaction menus.
6.1.2.8 Arrow Adjustment Keys
The arrow adjustment keys allow user interaction for various functions.
6.1.3 Aeromax™ Control System Power
After the LabGard® ES NU-813 is plugged into the appropriate facility line power the control system will power up.
The control panel will also indicate the power up status by blinking the red alarm LED. Pressing any key will
acknowledge the power up status and turn off the blinking red alarm LED.
If a power interruption occurs, all control system functions, calibrations and parameters will be maintained and
continue upon restoration of power. Just as the initial power up, the red alarm LED will blink to indicate power up
status.
6.1.4 Standby Mode
When the CVE is not in use any of the function keys except the blower that initiates run mode may be turned on
and off in standby mode.
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6.1.5 Run Mode
Any time the blower run key is pressed with the hinged window at its correct operational height, the RUN MODE
screen will be initiated. The Run Mode will start with the PresurFlow™ entering and approximate 3 minute warm
up period. The PresurFlow™ LED indicators will blink and indicate the following sequence:
st
minute – Left and right Red LED’s will blink
• 1
nd
• 2
minute – Left and right Green LED’s will blink
rd
• 3
minute – Center 3 Green LED’s will blink
Once the warm up period is complete, only one LED will indicate cabinet airflow status.
During the warm up period the cleaning process may begin. If the hinged window is raised, an audible and visual
alarm will occur, but may be silenced by pressing the alarm silence key.
6.1.6 Temporary Low Flow Mode
The NU-813 may be configured to allow the airflow to be temporarily lowered, but still provide some level of
protection for sensitive procedures. Typically, airflow in this mode is set to provide an average of 50 fpm versus
the standard 80 fpm. If temporary low flow mode is configured (see section 8.2.2), the blower must be on (green
LED above blower key will blink) and the window in its normal position. To activate, press the blower key for 5
seconds, once activated, blower LED indicator will blink fast and the PresurFlow™ will indicate 3 green LED
indicators will blink. The low flow mode will stay active for the timed duration (normally 15 minutes as
programmed, see 6.1.8.2) or can be terminated by pressing the blower key, for 5 seconds.
6.1.7 Standby/Run Mode Alarms
If present, standby/run mode alarms will be both visual and audible, the red alarm LED oval will turn on. Audible
alarms will produce an alarm tone for 30 seconds, then ring back for 2 seconds of every 5 seconds. Pressing the
alarm silence key will silence the audible alarm for 15 minutes initially then will start the ring back function again.
The list below represents alarm types and their respective priority from the highest to lowest priority.
1) New Firmware Loaded
2) Internal Board Failure
3) Power on Reset
4) Airflow Pressure Alarm
5) Blower RPM Failure
6) Window Open
Note: The above messages are described in greater detail in section 8.
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6.1.8 Operator Accessible Functions
6.1.8.1 Access and Navigation
To access the operator accessible functions,
• Press and hold the key, then enter the 3 key sequence for the desired function, then release
the key and follow each instruction set.
Note: Pressing the key at any time will abort and exit the process without saving any changes
made. Pressing the hidden key will accept all changes and exit.
6.1.8.2 Auto Timer Duration
Auto timer duration timers are countdown timers for the functions displayed once time is entered into a
function. The timer will begin to countdown upon the start of that function (i.e. press UV light key to start
timing the UV light). The LED indicator above the function key will start to blink indicating the timer function.
If the LED indicator was full on, no timer function is present. As the timer expires the function will turn off.
• Select auto timer duration function
o Outlets
Press and hold key, then press hidden – outlet – outlet keys sequentially.
LED indicator above outlet will blink fast. Adjust desired time as described below.
o Lights
Press and hold key, then press hidden – light – light keys sequentially.
LED indicator above light will blink fast. Adjust desired time as described below.
o UV Light
Press and Hold key, then press hidden – UV light – UV light keys sequentially.
LED indicator above UV light will blink fast.
Adjust desired time as described below.
• Low Flow Blower
Press and hold key, then press hidden-blower-blower keys sequentially.
LED indicator above Blower key will blink fast. Adjust desired time as described below.
o Adjust countdown time
Press ↑ or ↓ keys to adjust time.
Time will change in 15 minute increments as shown on the PresurFlow™ LED segments
below.
15 minutes for Red LED 30 Minutes for Yellow LED
1 hour for green LED Represents 8 hours (maximum time)
• Press hidden key to accept time and exit.
• Press key at any time to abort and exit.
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6.1.8.3 Blower Password
The blower on/off password allows the cabinet user to place a 3 key sequence requirement to turn the blower
on or off.
The 3 key sequence for the blower password will be a combination of the hidden and blower keys.
• Select blower password
Press and hold key, then press hidden – blower – hidden keys sequentially.
Red LED indicator above blower will blink fast.
• Select password
Press ↑ or ↓ key to scroll through the code choices below,
No Password
B-B-H password
B-H-B password (default)
B-H-H password only
H-B-B password
H-B-H password
H-H-B password
• Press hidden key to accept time and exit.
• Press key at any time to abort and exit.
Note: If the required blower password option is selected in the blower airflow option menu (see section 8.2.2).
Then the “No password” choice above is not available and the default remains B-H-B.
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6.2 Operating Guidelines
6.2.1 The intent herein is to present general operating guidelines that will aid in the use of the CVE to control airborne
contaminants of low to moderate risk.
6.2.2 Procedure protocols defined in terms of the barrier of control concepts unique to the CVE must be developed in
order to obtain a maximum potential for safety and protection. The pre-planning necessary to develop these
protocols is based on several fundamental considerations, each of which will contribute to optimum benefits from
the equipment:
a. Minimize disruption of "air curtain"
b. Minimize room activity
c. Employ aseptic techniques
6.2.3 The minimum number of items necessary should be placed into the enclosure to prevent overloading, but the
work should also be planned to minimize the number of times an operator's hands and arms must enter and leave
the air curtain at the open face. The ideal situation is to have everything needed for the complete procedure place
in the enclosure’s workzone before starting, so that nothing need pass in or out through the air barrier at the face
until the procedure is completed. This is especially important in working with moderate risk agents.
Note: When working with agents of lower risk, it is not as important for all materials to be placed in the enclosure
workzone before starting, or for the procedure to be completely finished before materials are removed. Also, the
time period for a unit of work may be continued over a more extended period during which entries and
withdrawals from the enclosure may be made.
6.2.4 Minimize Room Activity
Activity in the room itself should be held to a minimum. Unnecessary activity may create disruptive air currents as
well as interfere with the work of the operator. A person walking past the front of CVE can cause draft velocities
up to 175 fpm (.88 m/s), which are sufficient to disrupt the air barrier provided by the work access opening.
6.2.5 Employ Methodical Technique
The operator must not assume an attitude of "let the CVE do it". Properly used, the CVE will do an excellent job of
containing viable or toxic agents. Normal laboratory contamination control procedures and basic methodical
techniques are necessary to obtain maximum benefit from the CVE. This precaution is merely an extension of
good laboratory technique as practiced on open bench tops. The good laboratory practices designed to minimize
creating and/or release of aerosols to the environment should not be discontinued.
Items of equipment in direct contact with powders or etiological agents must remain in the cabinet until enclosed
or until surface-decontaminated. Trays of discard work materials and other work aids must be covered or bagged
before removal from the enclosure workzone (aluminum foil may substitute for fabricated covers).
If an accident occurs which spills or splatters suspensions of chemicals or etiologic agents around the work area, all
surfaces and items in the enclosure workzone must be surface-decontaminated before being removed.
In brief, the consideration which should be made in order to obtain optimal personnel safety and product
protection may be reiterated:
a. Pre-plan the procedures carefully
b. Minimize disruption of the "air curtain"
c. Employ aseptic techniques
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6.2.6 Operating Sequence
Start Up - Turn on CVE blower and lights, check air intake and exhaust portals of the unit to make sure they are
unobstructed. Blower speed must only be readjusted by qualified maintenance technicians.
Allow blowers to operate for a minimum of 5 minutes before manipulations are begun in the CVE. If the filtered
air exhausted from the unit is discharged into the room, as in some installations, an additional advantage is
obtained from purification (filtration) of characteristic contributing to the quality of the laboratory environment,
some owners of CVE leave them in operation beyond the time of actual use.
6.2.7 Wipe down for CVE Operation
The interior surfaces of the work space should next be disinfected by wiping them thoroughly with 70 percent
alcohol or similar non-corrosive antimicrobial agent.
NOTE: DISINFECTANTS THAT USE CHLORIDES AND HALOGENS WILL CAUSE DAMAGE TO THE
STAINLESS STEEL SURFACES IF PRESENT AND LEFT ON FOR LONG PERIODS OF TIME.
IF THE DISINFECTANT USED CONTAINS CHLORIDES OR HALOGENS, RE-WIPE ALL SURFACES
WITH 70% ALCOHOL OR SIMILAR NON-CORROSIVE ANTI-MICROBIAL AGENT TO PREVENT
DAMAGE TO STAINLESS STEEL.
6.2.8 Materials & Equipment
The apparatus and materials should next be placed into the enclosure workzone. Materials should be arranged so
that clean and dirty (used) materials are well separated.
6.2.9 Perform work
The work can now be performed. The technician performing the work is encouraged to wear appropriate personal
protective equipment (PPE), (i.e. a long-sleeved gown with knit cuffs, rubber gloves and appropriate respirator).
This will protect the hands and arms from viable agent and chemical contamination. At a minimum, the hands and
arms should be washed well with germicidal soap before and after work.
6.3.10 Terminal Purging & Wipe down
Following completion of the work, allow the cabinet to run for a 2-3 minute period without personnel activity to
purge the unit. The decontamination of the interior surfaces should be repeated after removal of all materials,
culture, apparatus, etc. A careful check should be made for spilled or splashed which may contaminate the work
environment.
6.2.11 Shut Down
Turn off blowers and lights. Do not use CVE as a depository for excess laboratory equipment during period of non-
operation.
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6.3 Ergonomics
Ergonomics, the study or accommodation of work practices is extremely important for proper CVE usage and user health
and safety. An evaluation of normal work practices should be performed with each user when working in a CVE. Evaluation
criteria should be at a minimum:
a. Proper user posture
b. Effective workzone layout for work practice
c. Vision or sightlines
For each of the above evaluation criterion, several aids may be supplied to accommodate the user.
• Ergonomic chair - A six-way articulating seat and back control for personalized adjustment to assure proper user
posture. Be sure feet are resting on the floor, chair foot support or foot rest. Also be sure back is fully supported
with proper chair adjustments.
• Forearm/elbow support - The cabinet is provided with a forearm support on the work access opening.
Periodic mini-breaks during work practice should be taken resting forearm to avoid stress and fatigue.
• Effective workzone layout - Always prepare your work procedure to minimize reach to avoid neck and shoulder
stress and fatigue. Rotating tables are optional to maximum workzone and minimize reach.
Vision and sightline - Always prepare your work procedure to eliminate glare and bright reflections on the window. Keep
your window clean and sightlines clear to your effect workzone.
6.4 Cleaning Procedures
6.4.1 General
Cleaning laboratory equipment is important in terms of both functionality and general good housekeeping. The
information provided below is intended to aid the development of facility Standard Operating Procedures (SOP’s) for
cleaning the equipment. It is strongly recommended that all cleaning materials used be tested and verified both in terms
of both effectiveness and material compatibility before they are written into the cleaning SOP documentation.
a. The airflow blower should be operating during the cleaning process to maintain sterility and/or containment during the
cleaning process.
b. Raise window to gain additional access if desired.
c. Apply appropriate cleaning material or surface disinfectant to surfaces. Most surface disinfectants require a specific
contact time depending the materials used within the work zone. CONSULT APPROPRIATE DISINFECTANT
DOCUMENTATION FOR PROPER APPLICATION AND SAFETY PRECAUTIONS.
c-1. Polycarbonate (Covestro® Makrolon®AR) has noted material compatibility concerns (see polycarbonate compatibility
section). They recommend the use of Hydrogen Peroxide based materials such as the following:
- Steriplex SD
- Safetec surface wipes
It is recommended to AVOID the use of cleaning materials that contain Chlorine, Quaternary Ammoniums and Phenol’s.
If the polycarbonate is lightly scratched, it may be able to be polished out with Mirror Glaze Plastic Polish or similar.
Further information may be available from www.covestro.com
- Peridox RTU
c-2. Stainless steel (type 304) has noted material compatibility concerns with Acids, Chlorides and Halogens. IF THESE
MATERIALS ARE USED AND ALLOWED TO BE LEFT ON THE STAINLESS STEEL SURFACE, OXIDATION AND DEGRADATION
WILL OCCUR. Only by re-wiping surfaces with either sterile water or 70% IPA will remove harmful materials from the
stainless steel surface.
Further information is available at the following: http://www.parrinst.com/wpcontent/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.
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Page 24
6.4.2 Panel Removal for Powder Use
CAUTION
!
If the enclosure is used to contain powdered materials, periodically the work zone panels should be removed and
cleaned. Use the following procedure for panel removal.
a. Open hinged window
b. Remove (2) knurled screws on the top of the rear panel. Lower panel and clean surfaces.
Once panel is clean, remove from enclosure.
c. Remove top panel by pushing up and back. Allow front to swing down, then back of panel can be raised
over side brackets. Again clean surfaces as required.
d. Clean rear plenum surfaces as well as top surfaces. Do not clean the HEPA filter surface.
e. Replace interior panels by reversing the process.
When removing contaminated interior panels, continue to operate the
enclosures blower to maintain negative pressure. Use appropriate
Personnel Protective Equipment (PPE) (i.e. face mask, gloves, Tyvek
gown) to mitigate exposure.
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Page 25
7.0 General Maintenance
Cabinet Size
-300/E
-400/E
-600/E
Cabinet
21.3 cu.ft.
28.5 cu.ft.
42.8 cu.ft.
Volume
(.603 cu.m)
(.807 cu.m)
(1.212 cu.m)
CAUTION
!
CAUTION
!
CAUTION
!
CAUTION
!
All maintenance actions on this equipment must be performed by a qualified
technician who is familiar with the proper maintenance procedures required
including both certification and repair.
7.1 Decontamination
No maintenance should be performed on the interior of the LabGard® CVE (area behind access panels) unless the cabinet
has been microbiologically decontaminated, is known to be biologically clean, or known to be chemically inert.
Surface disinfection is performed as specified in the Cleaning Procedures section.
Hazardous Gases! Personal Protection Equipment Required.
Decontamination using hazardous gas, vapor or mist must be performed in accordance with
the specifications of NSF/ANSI 49, Annex G, EN12469, Annex J or applicable national, state, province
or local regulations
This procedure presents considerable risks and must be performed only by specially trained and authorized service
personnel in accordance with applicable national safety regulations.
The decontaminate is generated either external or internal of the sealed cabinet. The quantity of decontaminate should
follow standard or manufacturer’s recommendations based on cabinet volume. The decontaminate process should follow
standards or manufacturer’s recommendations based on the decontaminate used.
All decontaminate materials are hazardous (chemical-liquid, gas and vapor)
(Flammable – process) and are required to be handled properly. Follow all
product and process documentation and labelling.
If microbiological decontamination is necessary, use the following procedure:
1. Place decontamination equipment inside the work area. Reference decontamination procedure,
per NSF Standard 49, Annex G.
2. Use duct tape and plastic to seal the entire cabinet.
Perform decontamination procedure per NSF Standard 49, Annex G.
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BE SURE THE CVE IS TOTALLY SEALED TO PREVENT ANY LABORATORY
EXPOSURE TO DECONTAMINATION GAS.
Page 26
7.2 Fluorescent Lamp Bulb Replacement
Description:
Exhaust HEPA Filter (Single)
Exhaust HEPA Filter (Dual)
Airflow Rating:
100 fpm @ .29 ± .05" w.g. per sq. ft.
100 fpm @ .48 ± .05" w.g. per sq. ft.
Frame Type:
Metal
Metal
NU-813-300/E
NuAire Part Number:
A-980939-15
A-980939-20 (2)
NuAire Part Number:
A-980939-16
A-980939-21 (2)
Filter Size:
14" (356mm) x 41" (1041mm) x 5-7/8" (149mm)
14" (356mm) x 41" (1041mm) x 3" (76mm)
NU-813-600/E
Filter Size:
14" (356mm) x 29" (737mm) x 5-7/8" (149mm)
14" (356mm) x 29" (737mm) x 3" (76mm)
CAUTION
!
CAUTION
!
The one (T8) fluorescent lamp bulb is cool white, rapid start and placed external to the cabinet to aid maintenance and
minimize heat build-up. The life rating of the bulb is 9000 hours based on three-hour burning cycles.
Disconnect electrical power from the CVE before attempting any
maintenance action.
To replace a bulb, it is necessary to access the control panel.
1. Remove fasteners on top or sides of control panel and rotate control center down.
2. The lamp bulb is removed by displacing the bulb to one side against the compressible bulb holder.
3. Reverse the procedure to reinstall the lamp assembly.
7.3 HEPA Filter Replacement (Drawing BCD-15639)
The HEPA Filter under normal usage and barring an accident does not need replacement until the work access inflow
velocity cannot be maintained.
Disconnect electrical power from the CVE before attempting any
maintenance action.
To access the exhaust HEPA filter:
1. Remove fasteners on top and sides of control panel and rotate control center down.
2. Remove exhaust filter cover and follow bag-in/bag-out procedure per drawing BCD-15639 for removal and
replacement.
3. Reverse above steps to complete the replacement process.
4: Filter Installation
When installing new filters, USE ONLY NUAIRE SPECFIED FILTERS FOR REPLACEMENT.
Efficiency: 99.995% @ 0.3 Micron 99.995% @ 0.3 Micron
Filter Size: 14" (356mm) x 29" (737mm) x 5-7/8" (149mm) 14" (356mm) x 29" (737mm) x 3" (76mm)
NU-813-400/E
NuAire Part Number: A-980939-15 (2) A-980939-20 (4)
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Page 27
7.4 Motor/Blower Replacement
7.4.1 The Motor/Blower assembly should never need any preventative maintenance. But in case of a malfunction, the
following steps should be taken. Make sure unit is decontaminated before doing any repairs on the interior of the
unit. Disconnect power or unplug unit before working with any electrical wiring. Motor/Blower removal should be
done by a qualified technician.
7.4.2 First, remove the top panel. Disconnect the electrical connections to impeller. Next remove impeller via fasteners.
(See Drawing BCD-15640, Sheet 3).
7.4.3 To install motor/blower reverse the above procedure.
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Page 28
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7.5 Airflow Control System Setup and Calibration
7.5.1 General
The operation of the NU-813 CVE requires that the setup and calibration procedures be performed in order to
certify or commission for usage. The setup and calibration procedures performed ONLY BY THE CERTIFIER ensure
that setpoints are verified and that the airflow monitor sensor is calibrated to the correct values.
7.5.2 Configuration Parameters
Configuration parameters identify CVE motor type and size for proper performance characteristics.
• Select/Verify model and size (Bold items represent default parameters)
o Press and hold key, then press blower – blower – blower keys sequentially.
LED indicates above both blower (red) and UV light keys will blink fast.
Review cabinet model size and change if desired as described below
o Press ↑ or↓ keys to scroll through the LED segment choices associated with model/size.
Class II, 3 foot
Class II, 4 foot
Class II, 5 foot
Class II, 6 foot
Laminar, 3/4 foot
Laminar, 5/6 foot
o Press hidden key to accept model/size and exit
o Press key at any time to abort and exit
• Select motor control function/type
o Press and hold key, then press light – light – light keys sequentially.
LED indicators above both blower (red) and light keys will blink fast.
Review motor control function/type and change it desired as described below.
o Press ↑ or ↓ keys to scroll through the LED segment choices associated with motor control
function/type.
Auto DC ECM motor
Fixed duty DC ECM motor
Fixed duty EC Impeller motor
o Press hidden key to accept motor control function/type and exit
o Press key at any time to abort and exit.
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Page 30
7.5.3 Airflow Calibration
CAUTION
!
The NU-813 Airflow Calibration consists of adjusting the airflow.
THIS WORK SHOULD BE DONE ONLY BY A QUALIFIED TECHNICIAN WHO CAN MEASURE THE AIRFLOW WITH A
SUITABLE VELOMETER. NuAire provides one adjustment to set the airflow within the cabinet.
This is: PWM signal adjust via calibration parameter menu.
The PWM signal or blower speed adjustment establishes the CVE’s total volume of airflow as well as makes up for
filter resistance tolerances.
DC ECM motor PWM signal DC voltage should also be monitored and recorded upon final calibration. The DC
voltage may be measured using a digital voltmeter. The two test points to measure DC ECM motor voltage are
located on the DC motor connector on the main control board.
Failure to calibrate airflow to the specified requirements may result
in unsafe conditions of performance (i.e. product and/or personnel
protection, noise and vibration)
The CVE is considered to be certifiable if the following airflow measurements are present:
Inflow average: 80 LFPM + 5 LFPM (.41 m/s + 0.25 m/s) using the direct inflow measurement method or related value
using the calculated inflow velocity measurement method.
BEFORE STARTING AIRFLOW CALIBRATION PROCEDURE, LET THE CVE RUN FOR AT LEAST 5 MINUTES.
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Page 31
7.5.3.1 Inflow Calibration
Step 1: Measure the inflow velocity using the recommended procedure found in Table 7.0. If necessary,
adjust to achieve the correct average inflow velocity within the stated range of 80 + 5 LFPM (.41 +
0.25 m/s).
Step 2: If necessary, enter active blower speed adjustment.
• Press and hold key, then press hidden – blower - ↑ keys sequentially.
Step 3: Press ↑ or ↓ keys to adjust blower speed.
• LED segments will indicate blower speed percentage and active blower speed adjustment
LED indicator above blower (green) key will blink fast.
o Right end red LED indicates active blower speed adjust
The red LED will blink as soon as any adjustments are made and will continue to blink as
the motor rpm settles. Once the red LED stops blinking, the motor will run steady state
at the new percentage.
Note: The red LED must be non-blinking to save or exit
o Green LED’s indicate percentage on of scale (0-100%)
o Yellow LED’s indicate minimum (left/maximum (right) blower speed has been achieved
Note: At any time during the process
• Press hidden key to accept and enter the blower speed calibration point
(If the blower speed calibration point was not successfully entered; a half second audible
alarm will occur. The calibration process must then be repeated for successful entry of
blower speed calibration point.)
• Press key to abort and exit
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Page 32
Table 7.0
4
(102) 8 (203)
12
(305)
16
(406)
20
(508)
24
(610)
28
(711)
32
(813)
4
(102) 8 (203)
12
(305)
16
(406)
20
(508)
24
(610)
28
(711)
32
(813)
36
(914)
40
(1016)
44
(1118)
4
(102) 8 (203)
12
(305)
16
(406)
20
(508)
24
(610)
28
(711)
32
(813)
36
(914)
40
(1016)
44
(1118)
48
(1219)
52
(1321)
56
(1422)
60
(1524)
64
(1626)
68
(1727) 3 (76)
7
(178)
Recommended Measurement Methods for CVE Inflow
A. Inflow/Velocity Measurement
a. Instrument: Shortridge Flowhood ADM-870 or TSI 8355 Thermo anemometer.
b. Procedure:
The inflow velocity is measured by using a Direct Inflow Measurement (DIM) Instrument (i.e. Shortridge flowhood).
The DIM Instrument can be used directly on the cabinet with NO CORRECTION FACTORS REQUIRED.
The DIM Instrument should also be duct taped to the cabinet to prevent any sneak air paths from occurring.
The DIM Instrument will read inflow volume (i.e. CFM).
Use the window access opening area to calculate inflow velocity.
Alternate Procedure
The calculated inflow measurement method may also be used.
Inflow air velocity is measured on a 4” by 4” (102mm by 102mm) grid in a vertical plane defined by the access opening.
Readings are taken 3” (76mm) from the top and bottom of the opening and 4” (102mm) from the sides.
c. Test Data - Inches (mm):
DIM Measurement:
300/E 400/E 600/E
Measured Intake Volume ft.3/min. (m3/s) ft.3/min. (m3/s) ft.3/min. (m3/s)
Access Open Area 2.43 ft2 (.23 m2) 3.26 ft2 (.3 m2) 4.86 ft2 (.45 m2)
Inflow Velocity ft./min.(m/s) ft./min.(m/s) ft./min.(m/s)
Inflow Velocity Measurement - Inches (mm):
Front Access Opening
300/E
400/E
600/E
Number of Readings Average Velocity ft./min.(m/s)
d. Acceptance Criteria: Nominal velocity must average 75 to 85 fpm (.38 to .43 m/s)
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Page 33
7.5.3.2 PresurFlow™ Alarm Set Points
The PresurFlow™ alarm setpoints are based on the calibration setpoint. Once the calibration setpoint is
entered, based on a nominal inflow velocity of 80fpm (.41mls) the associated pressure sensor value is entered
as the nominal pressure value. The high and low alarm setpoints are factory verified and set if needed at
60fpm (.30mls) and 100fpm (.51mls).
However, if specific use alarm setpoints are desired, the alarm setpoints may be adjusted by performing the following: Low Alarm Setpoint
• Press and hold the Hidden and ↓ key for 3 seconds. (The left red LED will blink and the green LED’s indicate blower speed)
• Press ↑ or ↓ keys to adjust blower speed to the desired airflow velocity low alarm setpoint value.
• Left end red LED indicates active low limit blower speed adjust
The red LED will blink as soon as any adjustments are made and will continue to blink as the motor rpm settles. Once the red LED stops blinking, the motor will run steady state ate the new percentage.
If the low alarm setpoint value is not within an acceptable range, the left end red LED will blink at a very fast rate.
Note: The red LED must be non-blinking to save or exit.
Note: At any time during the process
• Press hidden key to accept low alarm setpoint value
• Press and hold outlet key for three seconds to remove any previous offsets
• Press key to abort and exit
• Upon exiting, the blower will go back to actual airflows.
High Alarm Setpoint
• Press and hold the Hidden and ↑ key for 3 seconds. (The right red LED will blink and the green LED’s indicate blower speed)
• Press ↑ or ↓ keys to adjust blower speed to the desired airflow velocity high alarm setpoint value.
• Red end Red LED indicates active high limit blower speed adjust.
The red LED will blink as soon as any adjustments are made and will continue to blink as the motor
rpm settles. Once the red LED stops blinking, the motor will run steady state at the new percentage.
If the high alarm setpoint value is not within an acceptable range, the right end red LED will blink at a
very fast rate.
Note: The red LED must be non-blinking to save or exit.
Note: At any time during the process
• Press hidden key to accept low alarm setpoint value
• Press and hold outlet key for three seconds to remove any previous offsets
• Press key to abort and exit
• Upon exiting, the blower will go back to actual airflows.
Note: Specific use alarm setpoints or the offset pressure value from the nominal calibration point will
be maintained with a new nominal calibration value.
It is not necessary to re-enter the alarm setpoints after a nominal calibration.
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Page 34
7.5.3.3 Low Flow Calibration (See Section 8.2.2 to Activate the Low Flow Function)
The Nite Care mode is defaulted to operate the blower at approximately 600 rpm or a 14% duty cycle. However, if desired the Nite Care blower speed can be adjusted higher or lower by performing the following:
• Press and hold key, then press hidden – blower - ↓ keys sequentially.
LED indicator above blower (green) key will blink fast.
Press ↑ or ↓ keys to adjust blower speed.
• LED segments will indicate Nite Care blower speed percentage and active blower speed adjustment
o Left end red LED indicates active blower speed adjust
The red LED will blink as soon as any adjustments are made and will continue to blink as the motor
rpm settles. Once the red LED stops blinking, the motor will run steady state at the new percentage.
Note: The red LED must be non-blinking to save or exit
o Green LED’s indicate percentage on of scale (0-100%)
o Yellow LED’s indicate minimum (left/maximum (right) blower speed has been achieved
Note: At any time during the process
• Press hidden key to accept Low Flow blower speed calibration point
• Press key to abort and exit
7.5.3.4 PresurFlow Alarm Verification
The PresurFlow Alarm setpoints are based on the calibration setpoint. Once the calibration setpoint is
entered, the Alarm setpoint offset pressure values will align from the calibration pressure value. The high
or low alarm setpoint can be verified by measuring inflow volume/velocity while adjusting blower up or
down within the Alarm Verification menu.
• Press and hold key, then press ↑ ↓ ↑ sequentially releasing the key after the 3 key
sequence.
• Note: If blower was off while entering into the Alarm Verification Menu, the low alarm limit will
immediately activate. Turn on blower; once airflow is above the low alarm limit, the alarm will turn
off.
• LED segments will indicate blower speed percentage.
• Press ↑ or ↓ key to raise or lower blower speed. Alarm is active so yellow and red LED’s will activate
if pressure reaches the low or high alarm limit.
• Press to exit (blower should turn off and not go through normal start up procedure).
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Page 35
7.6 Filter Integrity Check
# Nozzles x 135 CFM x 100 ug/L
Challenge
Inflow (CFM)
Concentrations (ug/L)
# Nozzles x 229 CMH x 100 ug/L
Challenge
Inflow (CMH)
Concentrations (ug/L) Airflow FPM (m/s)
60 (.30)
80 (.41)
100 (.51)
Size
Challenge (ug/L)
300/E
93
69
56
400/E
69
52
41
600/E
46
35
28
The filter must be scan tested before installation into the CVE. Once installed, an internal reference leak test can be
performed to assure a proper installation was performed. Challenge aerosol (One Laskin Nozzle, PAO) should be supplied in
the rear center of the workzone and the exhaust probed above the ring. When probing, a leakage shall not exceed 0.005%
of the upstream concentration.
Internal reference concentration with one Laskin Nozzle open should be:
Laskin Nozzle Concentration Formula
=
=
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Page 36
7.7 Main Control Board Description and Replacement
OUTLET FUSE
(Option Only)
ACCESSORY OUTPUT FUSE
(Option Only)
CAUTION
!
CAUTION
!
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.
7.7.1 Main Control Board Replacement
The main control board consists of one Printed Circuit Board (PCB) assembly.
The PCB contains the power supply, configuration switch, sensor inputs/outputs and control inputs/outputs
components and display.
7.7.2 Main Control Board Fuse Replacement
Disconnect electrical power from CVE before fuse replacement.
All AC circuits are fuse protected and when replacement is necessary, USE ONLY FUSES OF SAME TYPE AND RATING
FOR PROTECTION AGAINST RISK OF FIRE.
7.7.3 Main Control Board Replacement
Note: All setup and calibration data will be lost, the memory reinitialized to the default values and all control
If possible, before the main control board replacement, it would be preferred to know the operational
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DESCRIPTION: BLOWER FUSE
FUSE TYPE: TIME-LAG TIME-LAG TIME-LAG TIME-LAG
FUSE SIZE: 1/4 X 1-1/4 INCH 5 X 20MM 5 X 20MM 5 X 20MM
NU-813-300/E 3 AMPS 3 AMPS 2 AMPS 1 AMP (2)
NU-813-400/E 3 AMPS 3 AMPS 2 AMPS 1 AMP (2)
NU-813-600/E 5 AMPS 3 AMPS 2 AMPS 1 AMP (2)
functions reset to an initial cabinet power condition.
parameters of the cabinet, (i.e. blower speed/PWM signal DC voltage setpoints if modified and airflow data
from previous certification).
The main control board is fastened to the control center with (6) 6-32 studs/nuts. All electrical connections are
made with removable terminals and/or Faston connectors except for the motor/blower connector which uses a
screw terminal. Remove all electrical connections and fasteners and then remove the main control board from the
control center.
Install new main control board by reattaching all electrical connections and fasteners. Once installed, rotate
control center to normal position and fasten in place. Reconnect power to cabinet.
LIGHT FUSES
Page 37
813 Dual HEPA Filter Testing
CAUTION
!
The NU-813 (Series 30) with the double HEPA filter option requires additional HEPA filter integrity testing.
The additional HEPA filter integrity tests are performed by accessing the ports behind the control box.
THESE PORTS ARE UNDER POSITIVE PRESSURE,
SO ACCESS SHOULD ONLY BE MADE WITH THE BLOWER OFF.
The access port LABELED S is connected to a sample tube which runs between the two filters.
The purpose of this port is to measure the primary HEPA filter’s integrity with a photometer.
When using a photometer to gross leak test the primary HEPA filter, the leakage shall not exceed .005% of the upstream
concentration. A similar technique may be used for a particle counter using the applicable methods and techniques.
For the primary HEPA the P.A.O. challenge is introduced into the cabinet workzone and the sample probe is taken from the port
labeled S on the unit behind the control box.
P.A.O. challenge introduced into cabinet Gross leak sample taken from the primary HEPA filter
workzone center rear wall
P.A.O. challenge introduced Probing exhaust airstream
The secondary HEPA filter may also be gross leak tested using the secondary filter P.A.O. supply port LABELED C to supply a P.A.O.
challenge to the filter. An internal reference must be used instead of measuring upstream concentration. Normal gross leak testing
techniques may then be used to verify filter integrity of the secondary HEPA.
For the secondary HEPA the challenge is introduced into the port labeled C on the unit.
The probe sample is taken at the outlet of the unit along the protective screen
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Page 38
Issue
Error Description
Correction
Hinged window is above standard
operating properly.
Check light fuse on main control board.
Check ballast.
Check blower fuse on main control board.
control board.
Indicates a power interruption has
occurred.
Check for short on output of fuse.
short.
PresurFlow™
and red LED alarm
Check airflow values.
Recalibrate PresurFlow™ system.
PresurFlow™
and red LED alarm
Message acknowledges new
microprocessor
Check connectors and wires from main
Replace motor if required
A third test shall be performed to verify the integrity of the seal of the cabinet itself. The same internal reference is used. The
challenge is introduced into the workzone and the exhaust airflow if probed. The leakage shall not exceed .005%.
8.0 Error Messages, Troubleshooting, Option-Diagnostics and Airflow Sensor Performance Verification
Audible alarms and error messages occur for a variety of reasons. Whenever an alarm condition has been present for a
period of at least 10 seconds, the audible alarm/error message will be presented and stay on until the error is cleared. The
audible alarm will be on for 30 seconds upon initial alarm condition, then once every ten seconds. When presented with an
error message, please perform the following:
Step 1: NOTE ALL ERROR MESSAGES.
Error message will appear on the control panel with red LED’s.
Step 2: VERIFY ERROR MESSAGES.
Error messages can be verified by clearing the error function by either turning the blower or the cabinet on
and off.
Step 3: MONITOR RE-OCCURRENCE OF ERROR MESSAGES.
If re-occurrence of the error message is immediate or daily, use the following guide to correct the situation.
8.1 Error Message Troubleshooting Guide
Window Alarm
(Window High)
Cabinet fluorescent
lights won’t Turn on
Cabinet blower won't
turn on.
Red alarm LED blinks
Blower or light fuse
continues to blow after
replacement.
left red LED indicator on
working height or micro switch is not
Blue LED above light key indicates the
lamp should be on.
Green LED above blower key indicates
the blower should be on.
Airflow Alarm.
N/A
PresurFlow™ reading low flow
(pressure)
Verify standard working height and
window micro switch operation.
Check fluorescent lamps.
Check voltage coming out of main control
board to light ballasts.
Check light starters, if present.
Check AC voltage coming out of main
control board.
Check wiring to blower.
Check blower motor.
Check DC motor PWM signal on main
Press any key to clear.
Isolate output of fuse by disconnecting
control center connectors, light circuit,
AC or DC blower circuit, etc. to isolate the
Check blower function.
right red LED indicator
on
All PresurFlow™
LED’s blink
Blower red LED blinks
and red LED alarm
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PresurFlow™ reading high flow
(pressure)
firmware was loaded into
Indicates that the motor rpm signal
has been interrupted
Check airflow values.
Recalibrate PresurFlow™ system.
N/A
control board to the motor
Page 39
8.2 Option Parameters
The option parameter menu allows A QUALIFIED TECHNICIAN to configure several different optional parameters per the
menu as described below.
8.2.1 Sync Function with Active Blower
To access the option parameter menu, perform the following:
• Press and hold key, then press hidden - Blower - Fluorescent keys sequentially.
Red LED indicator above the blower key will blink fast
The PresurFlow™ blinking green LED segments will indicate seven optional parameters as shown and described
below. The UV Light key (move lefts) and outlet key (move right) allows selection of the option parameter desired.
Once the desired option parameter is indicated, press ↑ or ↓ key to turn on or off. A slow blinking green LED
indicator means off and a fast blinking green LED indicator means on. Multiple option changes can be selected.
• Pressing the hidden key will accept all changes and exit
• Pressing the key will abort the process and exit
Sync Fan Relay with Active Blower -
Normally the fan relay will activate when the blower switch is pressed. Blower can
either be actively running or pending. If the fan relay sync is active the blower must
be actively running for the relay to change state.
Sync Accessary Outlet with Active Blower –
Normally the accessary outlet is on all the time. If the accessary outlet sync is active,
the blower must be actively running for the accessary outlet to turn on.
Sync Outlet Power with Active Blower –
Normally the outlet power is turned on via the outlet key. If the outlet power sync is
active, the outlet power will turn on and off with the blower or may be turned on and
off independently if the blower is active.
Sync Fluorescent Light with Active Blower –
Normally the fluorescent light is turned on via the fluorescent light key. If the
fluorescent light sync is active, the fluorescent light will turn on and off with the
blower or may be turned on and off independently if the blower is active.
Sync 15 Volt DC output with active blower normally the 15 Volt DC output located on
the control board is on when power is applied to the system. If the 15 Volt DC output
sync is active, the blower must be actively running for the 15 Volt DC output to turn
on.
8.2.2 Blower/Airflow Options
To access the option parameter menu, perform the following:
• Press and hold key, then press hidden - ↑ and ↓keys sequentially.
Red LED indicator above the blower key will blink fast
The PresurFlow™ blinking green LED segments will indicate seven optional parameters as shown and described
below.
The UV Light key (moves left) and outlet key (moves right) allows selection of the option parameter desired.
Once the desired option parameter is indicated, press ↑ or ↓ key to turn on or off. A slow blinking green LED
indicator means off and a fast blinking green LED indicator means on. Multiple option changes can be selected.
• Pressing the hidden key will accept all changes and exit
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• Pressing the key will abort the process and exit
Require Password –
Normally it is not required to use a password (i.e. 3 key press sequence of the blower
and hidden key). If the option is turned on, it would be required to use the correct
password to turn on the blower. The default password once turned on is blowerhidden-blower keys in sequence. The password can be changed in the blower
password option menu.
Note: If turning off the password option, you must also select the no password menu
item (see section 6.1.8.3)
Allow UV light anytime –
Normally the UV light is interlocked with the window being in the closed position.
For service purposes only, if the function is active, the UV light may be turned on at
any window height.
Note: In addition to the Allow UV light anytime system function, there is a double redundant UV light
window interlock relay. To override the UV light window interlock relay, the relay itself must
also be shorted. (See electrical schematic for reference).
Manual Blower Restart –
Normally when the blower is actively running and a power interruption occurs.
The blower will automatically come back on when power is restored. If this function
is turned off, the blower will not automatically come back after a power interruption,
but would require the user to press the blower key to restart the blower.
Low Flow –
Normally the function is turned off. If selected and turned on, once the blower is
actively running. Upon closure, the blower will continue to run at a calibrated lower
speed level to maintain a negative airflow. The PresurFlow™ will indicate(s) blinking
green LEDs along with green LED above blower key.
Disable PresurFlow™ -
If this function is active, the digital pressure sensor and alarm function are turned off.
Temporary Low Flow -
When this option parameter is turned on and the other requirements below are met,
the blower key (when held for 5 seconds) will toggle blower between normal and Low
Flow blower speed. The Low Flow blower will time out, based on the Auto Timer
duration for Low Flow without a blower key press and the blower speed will revert
back to normal.
In addition to turning this option on the following requirements must also be met
• Temporary Low Flow Option must be selected
• Password Option must be selected
• Window is at normal height and blower is running
• Low Flow Option must be selected
• Low Flow blower auto timer must be set for a minimum of 15 minutes.
Disable audible alarms / audible key feedback
Normally audible alarms from the PresurFlow™ monitor and audible key feedback are
present to provide an audible sound to the user. If this function is active, all audible
sound will be silenced when the control system is in normal run mode.
Audible sound will still occur in any service/calibration menu function.
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9.0
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10.0 Remote Contacts
The NU-813 has several contact closures for remote sensing of various functions.
10.1 Fan Relay
The fan relay contacts are normally open and closed contact closure outputs that are activated whenever the blower key
is pressed and the blower key LED indicator is on or blinking. Contact ratings are 250 VAC maximum at 2 Amps.
10.2 Alarm Relay
The alarm relay contacts are normally open and closed contact closure outputs which are activated whenever an airflow
alarm condition occurs. Contact ratings are 250 VAC maximum at 2 Amps.
10.3 15VDC Output
The 15VDC (100mA) output is generated if the blower is actively running.
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11.0 Electrical/Environmental Requirements
WARNING
!
11.1 Electrical (Supply voltage fluctuations not to exceed +/- 10%)
NU-813-300/400/600 115Vac, 60Hz, 1 Phase, 5 Amps
NU-813-300E/400E/600E 230Vac, 50/60Hz, 1 Phase, 3 Amps
11.2 Operational Performance (for indoor use only)
Environment Temperature Range: 41°F-104°F (5°C - 40°C)
Environment Humidity: Maximum relative humidity 80% for temperatures up to 31°C
Decreasing linearly to 50% relative humidity at 40°C
Environment Altitude: 6562 Feet (2000 Meters) Maximum
11.3 Light Exposure
Standard Fluorescent Lighting @ 150 ft. candles (1614 LUX) maximum intensity.
11.4 Installation Category: II
Installation category (overvoltage category) defines the level of transient overvoltage which the instrument is designed to
withstand safely. It depends on the nature of the electricity supply and its overvoltage protection means. For example,
in CAT II, which is the category used for instruments in installations supplied from a supply comparable to public mains
such as hospital and research laboratories and most industrial laboratories, the expected transient overvoltage is 2500 V
for a 230 V supply and 1500 V for a 120 V supply.
11.5 Pollution Degree: 2.0
Pollution degree describes the amount of conductive pollution present in the operating environment. Pollution degree 2
assumes that normally only non-conductive pollution such as dust occurs with the exception of occasional conductivity
caused by condensation.
11.6 Chemical Exposure
Chemical exposure should be limited to antibacterial materials used for cleaning and disinfecting. CHLORINATED AND
HALOGEN MATERIALS ARE NOT RECOMMENDED FOR USE ON STAINLESS STEEL SURFACES. Equipment
decontamination can be accomplished by non-condensing gas or vapor paraformaldehyde, Hydrogen Peroxide or
Chlorine Dioxide following NSF/ANSI Annex G.
11.7 EMC Performance (classified for light industrial)
Emissions: EN61326
Immunity: EN61326
Class A equipment is intended for use in an industrial environment.
In the documentation for the user, a statement shall be included drawing
attention to the fact that there may be potential difficulties in ensuring
electromagnetic compatibility in other environments, due to conducted as
well as radiated disturbances.
Note: The EMC performance requirements are generated within the product enclosure.
The enclosure will be all metal grounded to earth.
In addition, the membrane front panel will also include a ground plane for maximum protection
and an electrostatic shield.
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CAUTION
12.0 Disposal and Recycle
Component
Material
Top Cabinet
Painted Steel
Worksurface
Epoxy Resin
Window
Polycarbonate
Control Center
Painted Steel
Top Interior Panel
Painted Steel
Bottom Exterior Panel
Painted Steel
Exhaust Filter
Aluminum
HEPA Filter Frames
Stainless Steel and Plated Steel
Blower Wheel
Plastic or Aluminum
Motor
Various Steel/Copper
Printed Wiring Assembly
Lead Free Electronic
Wire
PVC Coated Copper
Ballasts
Various Steel, Electronic
Armrest
Stainless Steel
Connectors
Nylon
Hardware
Stainless Steel and Steel
Workzone Side Panels
Polycarbonate
Workzone Rear Panels
Polycarbonate
NOTE:
!
BIOHAZARD
RECYCLE
LEAD FREE
CVE’s 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.
Follow local, state and federal guidelines for disposal of HEPA filter solid waste.
Prior to any disassembly for disposal, the cabinet must be decontaminated.
Note: Material type can be verified with use of a magnet with stainless and aluminum being non-magnetic.
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