NuAire NU-813-300 Labgard Containment Hood User Manual
- June 4, 2024
- Nuaire
Table of Contents
- ABOUT THIS OPERATION & MAINTENANCE MANUAL
- General Information
- Warranty
- Shipments
- Installation Instructions
- Operating the NU-813
- General Maintenance
- Error Messages, Troubleshooting, Option-Diagnostics, and Airflow Sensor
- Remote Contacts
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
LabGard® Containment Ventilated Enclosure
Model
NU-813-300/400/600
Portable Bench Top
Operation & Maintenance Manual
November 2021
Revision 1
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.
MANUFACTURED BY:
NuAire, Inc. – Plymouth, Minnesota
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 that
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.
1.3 Explanation of Symbols
WARNING WARNING indicated a potentially hazardous situation that, if not
avoided, could result in Death or serious injury.
CAUTION CAUTION indicates a potentially hazardous situation that, if not
avoided, may result in Minor or moderate injury.
CAUTION CAUTION used without the safety alert symbol Indicates a
potentially hazardous situation that, if not avoided, may result in property
damage.
Potential electrical hazard, only qualified person to access
Note: Used for important information
Biohazard
**** Ground, Earth
Lead-Free
Flammable Hazard
Hazardous Gases! Personal Protection Equipment Required
Chemical Hazard
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)
Warranty
Details regarding product warranties can be found in the published warranty data separate from this manual and included within the data, a packet is sent with the unit.
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 to
state 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.
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
TECHNIQUES.
Where space permits, a clear 6-inch (152mm) area should be permitted on each
side of the enclosure for maintenance purposes. The electrical outlet to 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 cabinet 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 the model, and 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.
Note: THIS UNIT CONTAINS ELECTRONIC BALLASTS FOR THE LIGHTING. ELECTRONIC
BALLASTS OPERATE WITH A HIGH INRUSH CURRENT. IT IS NOT RECOMMENDED TO USE
THIS PRODUCT WITH GROUND
FAULT CIRCUIT INTERRUPTERS (GFCI) BECAUSE THE BALLASTS MAY CAUSE THE GFCI
TO TRIP.
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 surfaces 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 it.
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.
- HEPA filter leak test
- Inflow velocity test
- 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).
NOTE: 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).
NOTE: 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 assures superior reliability. However, the protection of other products and operators is so vital that certification to the performance requirements should be accomplished as stated to ensure safety established by the factory standards.
LabGard® Containment Ventilated Enclosure
Models NU-813-300/400/600
Catalog Number|
Catalog Number
---|---
NU-813-300
Nominal 3 foot (0.9m)| NU-813-400
Nominal 4 foot (1.2m)| NU-813-600
Nominal 6 foot (1.5m)
Performance Specifications
1. Personal Protection| ANSI/ASHRAE 110
NSF/ANSI 49
Surrogate Powder| ANSI/ASHRAE 110
NSF/ANSI 49
Surrogate Powder| ANSI/ASHRAE 110
NSF/ANSI 49
Surrogate Powder
NSF Std. No. 49 Class| Class I| Class I| Class I
Style of Cabinet| Benchtop/console with optional base stand| Benchtop/console
with optional base stand| Benchtop/console with optional base stand
Cabinet Construction| Polycarbonate panels with welded blower module.|
Polycarbonate panels with welded blower module.| Polycarbonate panels with
welded blower module.
HEPA Filter Seal Type: Exhaust Filter-99.995% Eff. on 0.3 microns| Neoprene,
Spring loaded| Neoprene, Spring loaded| Neoprene, Spring loaded
Fumigation per NIH/NSF Procedure| Yes| Yes| Yes
Optional Services: Gas Cocks 3/8″ NPT| Up to 3 ea. Sidewall| Up to 3 ea.
Sidewall| Up to 3 ea. Sidewall
Cabinet Size Inches (mm): Height
Depth Width| 54 (1372)
29 (737)
36 (914)| 54 (1372)
29 (737)
48 (1219)| 54 (1372)
29 (737)
72 (1829)
Work Access Opening Inches (mm):
Standard Opening Height/Optional
Standard Inflow Velocity| 8 (203)
80 FPM (.40 m/s)| 8 (203)
80 FPM (.40 m/s)| 8 (203)
80 FPM (.40 m/s)
Work Zone Inches (mm): Height Depth Width| 28 (711)
24 (610)
34-3/8 (873)| 28 (711)
24 (610)
46-3/8 (1178)| 28 (711)
24 (610)
70-3/8 (1788)
The viewing window is ¼ in (6mm). clear polycarbonate| Closed: 8 (203)
Open: 24 (610)| Closed: 8 (203)
Open: 24 (610)| Closed: 8 (203)
Open: 24 (610)
Noise: dbA Ambient Running| 53
57| 53
57| 53
62
CFM @ 80 FPM| 195 CFM| 260 CFM| 390 CFM
Heat Rejected, BTU, Per Hour (non-vented)| 265| 330| 600
Electrical: 115V (230V) Volts, AC (Hz)
Amps: Blower Amps: Lights Amps: Total
12 ft. Power Cord (one)| 115 60
1.6 (.8)
.2 (.2)
1.8 (1.0)
14 GA – 3 Wire, 15A| 115 60
1.8 (.8)
.2 (.2)
2.0 (1.0)
14 GA – 3 Wire, 15A| 115 60
3.2 (1.1)
4 (.2)
3.6 (1.3)
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.
***Crated shipping weight does not include weight for accessories or option
Operating the NU-813
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 LEDs 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 the 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).
AEROMAX CONTROL SYSTEM BLOCK DIAGRAM
Figure 1
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 sequences 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 using any of the function keys except the blower that
initiates run mode may be turned on and off in standby mode.
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 an approximate 3-minute warm-up period.
The PresurFlow™ LED indicators will blink and indicate the following sequence:
- 1st minute – Left and right Red LED will blink
- 2nd minute – Left and right Green LED will blink
- 3rd 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 (greenLED above blower key will blink) and the
window in its normal position. To activate, press the blower key for 5
seconds, once activated, the 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, and 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 the lowest priority.
- New Firmware Loaded
- Internal Board Failure
- Power on Reset
- Airflow Pressure Alarm
- Blower RPM Failure
- Window Open
Note: The above messages are described in greater detail in section 8.
6.1.8 Operator Accessible Functions
6.1.8.1 Access and Navigation
To access the operator accessible functions,
6.1.8.2 Auto Timer Duration
Auto timer duration timers are countdown timers for the functions displayed
once the time is entered into a function. The timer will begin to countdown
upon the start of that function (i.e. press the 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
The LED indicator above the outlet will blink fast. Adjust desired time as described below.
o Lights
The LED indicator above the light will blink fast. Adjust desired time as described below.
o UV Light
An LED indicator above the UV light will blink fast.
Adjust desired time as described below. -
Low Flow Blower
The LED indicator above the Blower key will blink fast. Adjust desired time as
described below.
o Adjust countdown time
Press ↑ or ↓ keys to adjust the time.
Time will change in 15-minute increments as shown on the PresurFlow™ LED
segments below.
- Press the hidden key to accept time and exit.
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 sequences for the blower password will be a combination of the hidden and blower keys.
-
Select blower password
The Red LED indicator above the blower will blink fast -
Select password
Press ↑ or ↓ key to scroll through the code choices below, -
Press the hidden key to accept time 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.
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 placed in the enclosure’s work zone 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 work zone 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. Good laboratory practices designed to minimize the creation
and/or release of aerosols into 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
discarded work materials and other work aids must be covered or bagged before
removal from the enclosure work zone (aluminum foil may substitute for
fabricated covers).
If an accident occurs that spills or splatters suspensions of chemicals or
etiologic agents around the work area, all surfaces, and items in the
enclosure work zone 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
6.2.6 Operating Sequence
Start-Up – Turn on the CVE blower and lights, and check the 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 characteristics 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 workspace should next be disinfected by wiping
them thoroughly with 70 percent alcohol or a 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 A 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 work
zone. 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 an appropriate
respirator).
This will protect the hands and arms from viable agents 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 the removal of all materials,
culture, apparatus, etc. A careful check should be made for spilled or
splashes that 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 a period of non-operation.
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 work zone layout for work practice
c. Vision or sightlines
For each of the above evaluation criteria, 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 footrest. Also, be sure the back is fully supported with proper chair adjustments.
-
Forearm/elbow support – The cabinet is provided with forearm support on the work access opening.
Periodic mini-breaks during work practice should be taken while resting the forearm to avoid stress and fatigue. -
Effective work zone layout – Always prepare your work procedure to minimize reach to avoid neck and shoulder stress and fatigue. Rotating tables are optional to the maximum work zone 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 work zone.
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 (SOPs) for cleaning
the equipment. It is strongly recommended that all cleaning materials used to
be tested and verified both in terms of both effectiveness and material
compatibility before they are written into the cleaning SOP documentation.
An a. The airflow blower should be operating during the cleaning process to
maintain sterility and/or containment during the cleaning process.
b. Raise the 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 on 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:
– Atriplex SD
– Safetec surface wipes
– Paradox RTU
It is recommended to AVOID the use of cleaning materials that contain
Chlorine, Quaternary Ammoniums, and Phenols.
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
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 sops.
6.4.2 Panel Removal for Powder Use
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.
**** 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.
a. Open hinged window
b. Remove (2) knurled screws on the top of the rear panel. Lower panel and
clean surfaces.
Once the panel is clean, remove it from the enclosure.
c. Remove the top panel by pushing up and back. Allow the front to swing down,
then the back of the 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.
General Maintenance
**** 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 in the sealed
cabinet. The quantity of decontaminating should follow standard or
manufacturer’s recommendations based on cabinet volume. The decontaminate
process should follow standards or manufacturer’s recommendations based on the
decontaminating 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 labeling.
If microbiological decontamination is necessary, use the following procedure:
- Place decontamination equipment inside the work area. Reference decontamination procedure, per NSF Standard 49, Annex G.
Cabinet Size| -300| -400| -600
---|---|---|---
Cabinet| 21.3 cup. ft.| 28.5 cu. ft.| 42.8 cu. ft.
Volume| (.603 cu.m)| (.807 cu.m)| (1.212 cu.m) - Use duct tape and plastic to seal the entire cabinet.
**** BE SURE THE CVE IS TOTALLY SEALED TO PREVENT ANY LABORATORY EXPOSURE TO DECONTAMINATION GAS.
Perform decontamination procedure per NSF Standard 49, Annex G.
7.2 Fluorescent Lamp Bulb Replacement
**** 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.
- Remove fasteners on top or sides of the control panel and rotate the control center down.
- The lamp bulb is removed by displacing the bulb to one side against the compressible bulb holder.
- 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:
- Remove fasteners on the top and sides of the control panel and rotate the control center down.
- Remove the exhaust filter cover and follow the bag-in/bag-out procedure per drawing BCD-15639 for removal and replacement.
- Reverse the above steps to complete the replacement process.
- Filter Installation
When installing new filters, USE ONLY NUAIRE SPECIFIED FILTERS FOR REPLACEMENT.
Description: Efficiency:
Airflow Rating: Frame Type:
| Exhaust HEPA Filter (Single) 99.995% @ 0.3 Micron
100 fpm @ .29 ± .05″ w.g. per sq. ft. Metal
| Exhaust HEPA Filter (Dual) 99.995% @ 0.3 Micron
100 fpm @ .48 ± .05″ w.g. per sq. ft. Metal
---|---|---
N U-813-300
NuAire Part Number:
Filter Size:| A-980939-15
14″ (356mm) x 29″ (737mm) x 5-7/8″ (149mm)| A-980939-20 (2)
14″ (356mm) x 29″ (737mm) x 3″ (76mm)
NU-813-400
NuAire Part Number:
Filter Size:| A-980939-16
14″ (356mm) x 41″ (1041mm) x 5-7/8″ (149mm)| A-980939-21 (2)
14″ (356mm) x 41″ (1041mm) x 3″ (76mm)
N U-813-600
NuAire Part Number:| A-980939-15 (2)| A-980939-20 (4)
Filter Size:| 14″ (356mm) x 29″ (737mm) x 5-7/8″ (149mm)| 14″ (356mm) x 29″
(737mm) x 3″ (76mm)
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 the unit is decontaminated before doing any repairs on the
interior of the unit. Disconnect power or unplug the 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 the impeller. Next, remove the impeller via fasteners.
(See Drawing BCD-15640, Sheet 3).
7.4.3 To install the motor/blower reverse the above procedure.
STEP 1:
LOWER CONTROL BOX AND FILTER COV LOOSEN FILTER PRESSURE FRAME BY TURNING THE
LEAD SCREW COUNTER-USE THE ENCLOSED TOOL TO PRY AND PULL THE OLD FILTER OUT
INTO THE BA (NOTE: BE SURE BAG IS SECURELY ON FRAME. [F NEEDED,
USE DUCT TAPE TO SECURE.)
STEP
2:
HEAT SEAL OR WIRE TIE AT A POINT BETWEEN THE OLD FILTER AND THE BAG-IN/RAG-OUT
F[ ANGE. THE HEAT SEAL OR WIRE-TIED AREA SHOULD BE WIDE ENOUGH SO THAT WHEN
THE BAG IS CUT WITH SCISSORS, THE SEAL REMAINS INTACT ON BOTH SIDES OF THE
CUT. OR HEAT SEAL OR WIRE TIE 2 SEAMS AND CUT BETWEEN THE TWO.
DISPOSE OF THE CONTAMINATED FILTER. RETAIN FILTER TOOL NEAR THE BAG-IN/BAG-OUT
FRAME.
REV | ECO | DESCRIPTION | DATE | DFTM | CHKD |
---|---|---|---|---|---|
A | 11777 | RELEASE TO PRODUCTION | 10/23/2012 | AW | IAS, Fie |
STEP 3:
PUT THE NEW FILTER IN A CLEAN PLASTIC BAG. BE SURE TO APPLY A LITTLE SILICONE
GREASE TO THE FILTER GASKET BEFORE PUTTING IT IN THE PLASTIC BAG. SECURE THE
NECK OF THE NEW BAG OVER THE OLD AND ONTO THE FLANGE OF THE BAG-IN/BAG-OUT
RING.
(NOTE: AGAIN, USE DUCT TAPE AS NECESSARY TO SECURE)
STEP 4:
PULL THE OLD BAG STUB AWAY FROM THE BAG-IN/BAG-OUT FLANGE AND WORK IT INTO 1HE
REAR OF THE NEW BAG. HEAT SEAL OR WIRE TIE AND CUT OFF THE PORTION CONTAINING
THE OLD BAG STUB. PUSH THE NEW FILTER INTO THE CABINET UNTIL THE FRONT OF THE
FILTER IS FLUSH WITH THE FILTER PRESSURE FRAME. RE-CLAMP THE FILTER PRESSURE
FRAME BY TURNING THE LEAD SCREW CLOCKWISE. FOLD THE NEW BAG INSIDE THE CAVITY
AND REPLACE THE FILTER COVER. THE FILTER/SEAL INTEGRITY CI NECK MAY NOW BE
MADE.
|
---|---
OVERVIEW:
THE BAG-IN/BAG-OUT PROCEDURE MAINTAINS A BARRIER BETWEEN THE OPERATOR AND
DANGEROUS MATERIAL.
THE CONTAMINATED FILTER CAN BE REMOVED FROM THE AREA AND A NEW FILTER
INSTALLED WITHOUT EXPOSING PERSONNEL.
SEAL CHAMBER AND DECONTAMINATE PER NIH/NSF PROTOCOL BEFORE STARTING FILTER
REPLACEMENT PROCEDURE.
PLEASE NOTE THAT THE POLYETHYLENE BAG IS SECURED TO THE BAG-IN/BAG-OUT FLANGE
WITH AN ELASTIC CORD.
IT IS RECOMMENDED THAT DUCT TAPE BE ADDED TO THIS AREA TO AID IN HOLDING THE
BAG ONTO THE BAG-IN/BAG-OUT FLANGE DURING THE EXHAUST FILTER REPLACEMENT
PROCEDURE.
REFER TO STEPS 1-4 FOR DETAILED INFORMATION.
|
PROPRIETARY
THE INFORMATION CONTAINED HEREIN IS THE EXCLUSIVE PROPERTY OF
NUAIRE INC. AND IS NOT TO BE DIVULGED OR USED IN ANY MANNER
WITHOUT THE EXPRESS WRITTEN PERMISSION OF NUAIRE INC.
---|---
DATE| 10/16/2012| TITLE
NU-813, SERIES 30 BAG-IN /
BAG-OUT FILTER
REPLACEMENT PROCEDURE
DFTM| AW
CHKD| MSS|
UNLESS OTHERWISE
SPECIFY EC DIMENSIONS
ARE IN INCHES-TOLERANCES.-
DECIMALS ± .032
ANGLES ± 2′| PART
NUMBER BCD 15639
|
A
PROJECT] NUMBER| | SHEET 1 OF 1
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)
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.
o Press the hidden key to accept model/size and exit
• Select motor control function/type
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. o Press the hidden key to accept motor
control function/type and exit
7.5.3 Airflow Calibration
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 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.
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 THE AIRFLOW CALIBRATION PROCEDURE, LET THE CVE RUN FOR AT
LEAST 5 MINUTES.
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.
The LED indicator above the blower (green) key will blink fast.
Step 3: Press ↑ or ↓ keys to adjust the blower speed.
• LED segments will indicate blower speed percentage and active blower speed
adjustment
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 at a 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 the 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 the successful entry of the blower speed calibration point.)
Table 7.0
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 flow hood).
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| 400| 600
---|---|---|---
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| 4(102)| 8 (203)| 12 (305)| 16 (406)| 20(508)| 24 (610)| 28 (711)| 32
(813)|
---|---|---|---|---|---|---|---|---|---
400| 4 (102)| 8 (203)| 12 (305)| 16 (406)| 20 (508)| 24 (610)| 28 (711)| 32
(813)| 36 (914)| 40 (1016)| 44 (1118)|
600| 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)| | | | | | | | | | | | | | | | |
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)
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 factories 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 at a steady state at 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 the hidden key to accept the low alarm setpoint value
-
Press and hold the outlet key for three seconds to remove any previous offsets
-
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 at a 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 the hidden key to accept the low alarm setpoint value
-
Press and hold the outlet key for three seconds to remove any previous offsets
-
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.
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:
The LED indicator above the blower (green) key will blink fast.
Press ↑ or ↓ keys to adjust the 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 at a 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 the hidden key to accept the Low Flow blower speed calibration point
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 with the calibration pressure value. The high or low alarm setpoint
can be verified by measuring inflow volume/velocity while adjusting the blower
up or down within the Alarm Verification menu.
**** | **** |
---|
-
Note: If the blower was off while entering into the Alarm Verification Menu, the low alarm limit will immediately activate. Turn on the blower; once airflow is above the low alarm limit, the alarm will turn off.
-
LED segments will indicate the blower speed percentage.
-
Press ↑ or ↓ key to raise or lower the blower speed. The alarm is active so yellow and red LEDs will activate if the pressure reaches the low or high alarm limit.
7.6 Filter Integrity Check
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 work zone and the exhaust probed above
the ring. When probing, leakage shall not exceed 0.005% of the upstream
concentration.
Internal reference concentration with one Laskin Nozzle open should be:
Laskin Nozzle Concentration Formula
| Airflow FPM (m/s)
---|---
60 (.30)| 80 (.41)| 100 (.51)
Size| Challenge (ug/L)
300| 93| 69| 56
400| 69| 52| 41
600| 46| 35| 28
7.7 Main Control Board Description and 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.
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.
DESCRIPTION:| BLOWER FUSE| OUTLET FUSE (Option Only)| ACCESSORY OUTPUT
FUSE(Option Only)| LIGHT FUSES
---|---|---|---|---
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| 3 AMPS| 3 AMPS| 2 AMPS| 1 AMP (2)
NU-813-400| 3 AMPS| 3 AMPS| 2 AMPS| 1 AMP (2)
NU-813-600| 5 AMPS| 3 AMPS| 2 AMPS| 1 AMP (2)
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 functions reset to an initial cabinet power
condition.
If possible, before the main control board replacement, it would be preferred
to know the operational parameters of the cabinet, (i.e. blower speed/PWM
signal DC voltage setpoints if modified and airflow data from the previous
certification).
Disconnect electrical power from the CVE before attempting any maintenance
action.
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 the control center to a normal position and fasten it in place. Reconnect power to the cabinet.
813 Dual HEPA Filter Testing
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 that 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 work
zone 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 work zone center rear wall| Gross
leak sample taken from the primary HEPA filter
|
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. the 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
the 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
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 work zone and the exhaust airflow is probed. The leakage
shall not exceed .005%.
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.
An error message will appear on the control panel with red LEDs.
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 the re-occurrence of the error message is immediate or daily, use the
following guide to correct the situation.
8.1 Error Message Troubleshooting Guide
Issue | Error Description | Correction |
---|---|---|
0Window Alarm (Window High) | The hinged window is above standard working | |
height or the microswitch is not operating properly. | Verify standard working |
height and window micro switch operation.
Cabinet fluorescent lights won’t Turn on| The Blue LED above the light key
indicates the lamp should be on.| Check the light fuse on the main control
board. Check fluorescent lamps.
Check the voltage coming out of the main control board to light ballasts.
Check light starters, if present. Check ballast.
The Cabinet blower won’t turn on.| The green LED above the blower key
indicates the blower should be on.
Airflow Alarm.
| Check blower fuse on main control board. Check AC voltage coming out of the
main control board.
Check wiring to the blower. Check the blower motor.
Check DC motor PWM signal on main control board.
Red alarm LED blinks| Indicates a power interruption has occurred.| Press any
key to clear.
Blower or light fuse continues to blow after replacement.| N/A| Check for
short on the output of the fuse. Isolate output of fuse by disconnecting
control center connectors, light circuit, AC or DC blower circuit, etc. to
isolate the short.
PresurFlow™ left a red LED indicator and a red LED alarm| PresurFlow™ reading
low flow (pressure)| Check airflow values. Check the blower function.
Recalibrate PresurFlow™ system.
PresurFlow™ right red LED indicator on and red LED alarm| PresurFlow™ reading
high flow (pressure)| Check airflow values.
Recalibrate PresurFlow™ system.
All PresurFlow™ LED’s blink| Message acknowledges new firmware was loaded into
the microprocessor| N/A
Blower red LED blinks and red LED alarm| Indicates that the motor rpm signal
has been interrupted| Check connectors and wires from the main control board
to the motor Replace the motor if required
8.2 Option Parameters
The options 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 options parameter menu, perform the following:
The 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) allow the selection of the options parameter desired.
Once the desired option parameter is indicated, press ↑ or ↓ key to turn it 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
| Sync Fan Relay with Active Blower –
Normally the fan relay will activate when the blower switch is pressed. The
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 accessory outlet is on all the time. If the accessory 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 options parameter menu, perform the following:
The 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) allow the selection
of the options parameter desired.
Once the desired option parameter is indicated, press ↑ or ↓ key to turn it 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
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 blower hidden-blower keys in sequence. The password can be changed in the lower password options 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 a green LED above the blower
key.
Disable PresurFlow™ –
If this function is active, the digital pressure sensor and alarm function are
turned off.
Temporary Low Flow –
When this optional parameter is turned on and the other requirements below are
met, the blower key (when held for 5 seconds) will toggle the 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
- The window is at normal height and the 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 sounds will be silenced when the control system is in
normal run mode.
Audible sound will still occur in any service/calibration menu function.
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.
11.0 Electrical/Environmental Requirements
11.1 Electrical (Supply voltage fluctuations not to exceed +/- 10% )
NU-813-300/400/600 115Vac, 60Hz, 1 Phase, 5 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
The 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 the earth.
In addition, the membrane front panel will also include a ground plane for
maximum protection and an electrostatic shield.
12.0 Disposal and Recycle
CVEs 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.
NOTE: Follow local, state, and federal guidelines for disposal of HEPA
filter solid waste.
BIOHAZARD
CAUTION Prior to any disassembly for disposal, the cabinet must be
decontaminated.
RECYCLE | LEAD-FREE |
---|
Component
Top Cabinet
Worksurface
Window
Control Center
Top Interior Panel
Bottom Exterior Panel
Exhaust Filter
HEPA Filter Frames
Blower Wheel
Motor
Printed Wiring Assembly
Wire
Ballasts
Armrest
Connectors
Hardware
Workzone Side Panels
Workzone Rear Panels| Material
Painted Steel
Epoxy Resin
Polycarbonate
Painted Steel
Painted Steel
Painted Steel
Aluminum
Stainless Steel and Plated Steel
Plastic or Aluminum
Various Steel/Copper
Lead-Free Electronic
PVC Coated Copper
Various Steel, Electronic
Stainless Steel
Nylon
Stainless Steel and Steel
Polycarbonate
Polycarbonate
Note: Material type can be verified with the use of a magnet with stainless and aluminum being non-magnetic.
Parts List
I TEM| PART NUMBER| DESCRIPTION
6| A-813-1570| COVER, CABLE
24| B-813-1522-TAB| VVELDMENT, CONTROL BOX
27| B-813-1532-TAB| REAR DIVIDER PANEL
28| B-813-1533-TAB| FILLER ANGLE
29| B-813-1534-TAB| WORKZONE TOP PANEL
40| F-813-1404| ASSEMBLY, MAGNET HOUSING
47| X-980494-01| 5/16 ACORN NUT
50| X-980609-03| 8-32 X 1/2 SCREW
53| X-980619-04| 8-32 X 3/4 SCR KNL SS
54| X-980667-01| 5/16-18 X 3/4 BOLT
59| X-980790-04| WASHER FL 5/16 SAE ZINC
Parts List
ITEM | PART NUMBER | DESCRIPTION |
---|---|---|
3 | A-540-737 | CORD PASSTHRU MEMBRANE |
4 | A-813-1438 | BRACKET, CONTROL BOX HINGE |
5 | A-813-1456 | HINGE BACKING PLATE |
6 | A-813-1570 | COVER, CABLE |
7 | A-813-499 | BRACKET, LIFT |
8 | A-813-886 | BACKUP PLATE, WINDOW LIFT |
13 | B-813-1248-TAB | INELDMENT, BACK PANEL |
14 | B-813-1257 | AIRFOIL SIDE |
15 | B-813-1399-TAB | HINGED VIEW SCREEN |
16 | B-813-1403-TAB | UPPER WINDOW |
25 | B-813-1531-01 | PANEL RS |
26 | B-813-1531-02 | PANEL LS |
27 | B-813-1532-TAB | REAR DIVIDER PANEL |
28 | B-813-1533-TAB | FILLER ANGLE |
29 | B-813-1534-TAB | WORKZONE TOP PANEL |
30 | B-813-1535-01 | ATTACHMENT ANGLE R.S. |
31 | B-813-1535-02 | ATTACHMENT ANGLE L.S. |
32 | B-813-1581-TAB | AIRFOIL FOR WORK SURFACE (REMOVABLE) |
33 | B-813-1582-01 | AIRFOIL SIDE MOUNTING FLANGE RS |
34 | B-813-1582-02 | AIRFOIL SIDE MOUNTING FLANGE LS |
35 | B-813-1585 | ASSEMBLY, CHUTE |
36 | B-813-1586 | PORT COVER, INSIDE |
37 | 8-813-1587 | PORT COVER, OUTSIDE |
38 | B-813-1590 | ASSEMBLY, PORT COVER |
41 | X-980038-01 | 8-32 X 3/8 PPHMS |
42 | X-980185 | 5/16-18 BALLSTUD |
43 | X-980250-04 | WINDOW RAM |
44 | X-980430-02 | LKNUT 1/4-20 SERR FLNG ZINC |
45 | X-980432-01 | NUT, T 5/16-18UNC PLAIN |
46 | X-980490-09 | 10-24 SST LOCKNUT |
47 | X-980494-01 | 5/16 ACORN NUT |
48 | X-980505-24 | 0-RING 5.60″ ID 70A BUNA-N |
49 | X-980510 | ACORN NUT, 8-32 SST |
50 | X-980609-03 | 8-32 X 1/2 SCREW |
51 | X-980609-05 | 8-32 X .750 PPH |
52 | X-980609-06 | SCR PPH 8-32 X 1-1/4 SST |
53 | X-980619-04 | 8-32 X 3/4 SCR KNL SS |
55 | X-980692-02 | #10-24 X .750 HEX HD (SST) |
56 | X-980724-03 | SCREW, TRUSS – 8-32 x .750 |
57 | X-980781-06 | 5/16 LOCK WASHER |
58 | X-980783-03 | #8 SST FLAT WASHER |
59 | X-980790-04 | WASHER FL 5/16 SAE ZINC |
60 | X-980794-01 | FLAT WASHER, #8 |
61 | X-980815-03 | #8 INT. TOOTH LOCK WASHER |
62 | X-980906-02 | WINDOW HINGE |
(STANDARD) Pails List
REM| PART NUMBER| DESCRIPTION
1| A-430-2217| WELDMENT COUPLING MOUNTING PLATE
2| A-480-9037| CONTROL BOX BRACKET
9| A-980939-15| HEPA 14X29X6 AL FR BEAD PACK (-300 /-600 (2))
10| A-980939-16| HEPA 14X41X6 AL FR BEAD PACK-400
11| A-980939-20| HEPA 14X29X3 AL FR BEAD PACK (-300 /-600 (2))
12| A-980939-21| HEPA 14X41X3 AL FR BEAD PACK-400
17| 8-813-1415-TAB| WELDMENT, TOP PANEL
18| B-813-1417-TAB| SEAL FLANGE BI / BO ( -600 (2))
19| B-813-1420-TAB| WELDMENT, BI / BO COVER (-600 (2))
20| B-813-1423-TAB| WELDMENT, PLATE, EC IMPELLER ( -600 (2))
21| B-813-1428-TAB| BAG ASSEMBLY, SINGLE FILTER 813 ( -600 (2))
22| B-813-1431-TAB| ASSEMBLY, CHAIN RACK ( -600 (2))
23| B-813-1443-TAB| ASSEMBLY, FILTER SPACER PLENUM ( -600 (2))
39| F-425-3697| ASSY, SCREW W/CAPTIVE 0-RING
44| X-980430-02| LKNUT 1/4-20 SERR FLNG ZINC
50| X-980609-03| 8-32 X 1/2 SCREW
63| X-999148-17| ASSY, IMPELLER & HARNESS
64| X-999260-02| SEAL, CORD CRIMP
Parts List
ITEM| GIN| PART NUMBER| 3 FT.| 4 FT.| 6 FT.| DESCRIPTION
1| 2| A-425-7373| | | | BRACE LATERAL, BSC
2| 8| A-500-395| | | | BUSHING, BASE STAND LEG
3| 2| 8-400-9562| | | | WELDMENT, END PANEL, BASESTAND (28″)
4| 4| B-500-390| | | | LEG EXTENSION, BASE STAND
5| 1| B-500-391-TAB| -1| -2| -4| WELDMENT, CROSS MEMBER PANEL 3 FT.
6| *4| 8-800-1579| | | | LEG EXTENSION, BASE STAND EXTENDED HEIGHT
7| 1| B-813-1510-01| | | | BRACKET,813 BASE STAND, FRONT LEFT
8| 1| 6-813-1510-02| | | | BRACKET.813 BASE STAND FRONT RIGHT
9| 1| B-813-1511-01| | | | BRACKET, 813 BASE STAND, REAR LEFT
10| 1| B-813-1511-02| | | | BRACKET, 813 BASE STAND, REAR RIGHT
11| 4| X-980443| | | | LEG LEVELER FOR 2″ SQ TUBING
12| 8| X-980493| | | | ACORN NUT, 1/4-20
13| 8| X-980494-03| | | | NUT, ACORN 3/8-16 18-8 SST
14| 8| X-980495| | | | 1/420 NUTSERT
15| 4| X-980609-06| | | | SCR PPH 8-32 X 1-1/4 SST
16| 20| X-980659-12| | | | SCREW, HHCS, 1/4-20 X 5/8 18-8 SST
17| 8| X-980781-07| | | | 3/8 LOCK WASHER
18| 4| X-980783-03| | | | #8 SST FLAT WASHER
19| 16| X-980783-07| | | | WASHER FL 3/8 SAE NKL
20| 28| X-980794-02| | | | 1/4 SST FLAT WASHER
21| 20| X-980815-01| | | | 1/4 INTERNAL TOOTH LOCK WASHER
22| 8| X-980929-01| | | | BOLT 3/8-16 X 2-3/4 SST
Parts List
ITEM| QTY| PART NUMBER| 3 FT.| 4 FT.| 6 FT.| DESCRIPTION
1| 2| A-425-7373| | | | BRACE LATERAL, BSC
2| 8| A-500-395| | | | BUSHING, BASE STAND LEG
3.| 2| B-400-9562.| | | | WELDMENT, END PANEL, BASESTAND (28″)
4| 1| B-500-391-TAB| -1| -2| | WELDMENT, CROSS MEMBER PANEL 3 FT.
5| 4| B-500-507| | | | WELDMENT, LEG EXTENSION (CASTOR)
6| 4| 13-620-2285| | | | BASE STAND, SAFETY ANGLE FOR 4-INCH CASTER
7| “4| B-800-1577| | | | WELDMENT, LEG EXTENSION (CASTOR) EXTENDED HEIGHT
8| 1| 8-813-1510-01| | | | BRACKET,813 BASE STAND, FRONT LEFT
9| 1| B-813-1510-02| | | | BRACKET,813 BASE STAND FRONT RIGHT
10| 1| B-813-1511-01| | | | BRACKET, 813 BASE STAND, REAR LEFT
11| 1| B-813-1511-02| | | | BRACKET, 813 BASE STAND, REAR RIGHT
12| 4| X-980040-08| | | | CASTOR, SWIVEL W/ BRACKET, 4″. SST
0.| 16| X-980490-06| | | | NUT HEX 5/16 -18, FINISHED, SST
14| 8| X-980493| | | | ACORN NUT, 1/4-20
15| 8| X-980494-03| | | | NUT, ACORN 3/8-16 18-8 SST
16| 8| X-980495| | | | 1/4-20 NUTSERT
17| 4| X-980609-06| | | | SCR PPH 8-32 X 1-1/4 SST
18| 20| X-980659-12| | | | SCREW, HHCS, 1/4-20 X 5/8 18-8 SST
19| 16| X-980667-01| | | | 5/16-18 X 3/4 BOLT
20| 8| X-980781-07| | | | 3/8 LOCK WASHER
21| 4| X-980783-03| | | | #8 SST FLAT WASHER
22| 16| X-980783-07| | | | WASHER FL 3/8 SAE NKL
23| 32| X-980790-06| | | | WASHER FL 5/16 SAE SST
24| 28| X-980794-02| | | | 1/4 SST FLAT WASHER
25| 16| X-980795-05| | | | WASHER LK 5/16″ SPLIT 18-8 SST
26| 20| X-980815-01| | | | 1/4 INTERNAL TOOTH LOCK WASHER
27| 8| X-980929-01| | | | BOLT 3/8-16 X 2-3/4 SST
NOTE: REMOVE TOP PANEL FROM UNIT TO DRILL DUCT CANOPY MOUNTING HOLES TO AVOID METAL PARTICLES FROM DROPPING INTO BLOWER/HEPA FILTER.
INSTALLATION
- LOCATE CANOPY TRANSITION BRACKET IN (3) EQUAL DISTANT SPACES (120°) AROUND 12 INCH DIAMETER CIRCUMFERENCE OF DUCT CANOPY. POSITION WITH BOTTOM OF CANOPY TRANSITION BRACKET FLANGE FLUSH WITH BOTTOM OF DUCT CANOPY.
- DRILL 0.188 HOLES (QTY: 6) AND FASTEN BRACKETS WITH 8-32 X 112- SCREWS AND NUTS PROVIDED.
- REMOVE TOP PANEL FROM NU-813 AND LOCATE DUCT CANOPY ON TOP PANEL EXHAUST COLLAR MARKING ONE HOLE LOCATION ON EACH BRACKET.
- DRILL 0.136 HOLES (QTY:3, ONLY ONE REQUIRED PER BRACKET) IN THE TOP PANEL EXHAUST COLLAR AND FASTEN DUCT CANOPY BRACKETS WITH #8 X 1/2″ SHEET METAL SCREWS PROVIDED
- RE-ATTACH TOP PANEL AND CONNECT FACILITY EXHAUST DUCT.
OM0304
November/2021
References
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