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User’s Manual
Labconco Corporation
HOME PAGE www.labconco.com
Please read the user’s manual before operating the equipment.
TXE – Tall XPert® Enclosure
Models
3892000, 3892001, 3892002,
3892020, 3892021, 3892022
8811 Prospect Avenue
Kansas City, MO 64132-2696
800-821-5525, 816-333-8811
FAX 816-363-0130
E-MAIL labconco@labconco.com
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Copyright © 2009, 2014, 2015 Labconco Corporation. All rights reserved.
Warranty
Labconco provides a warranty on all parts and factory workmanship. The warranty includes areas of
defective material and workmanship, provided such defect results from normal and proper use of the
equipment. Glassware is not warranted from breakage when dropped or mishandled.
The warranty for all TXE’s – Tall XPert® Enclosures will expire one year from date of installation or
two years from date of shipment from Labconco, whichever is sooner. Warranty is non-transferable
and only applies to the owner (organization) of record.
This limited warranty covers parts and labor, but not transportation and insurance charges. In the
event of a warranty claim, contact Labconco Corporation or the dealer who sold you the product. If
the cause is determined to be a manufacturing fault, the dealer or Labconco Corporation will repair or
replace all defective parts to restore the unit to operation. Under no circumstances shall Labconco
Corporation be liable for indirect, consequential, or special damages of any kind. This statement may
be altered by a specific published amendment. No individual has authorization to alter the provisions
of this warranty policy or its amendments. Lamps and filters are not covered by this warranty.
Damage due to corrosion or accidental breakage is not covered.
The information contained in this manual and the accompanying products are copyrighted and all rights
reserved by Labconco Corporation. Labconco Corporation reserves the right to make periodic design
changes without obligation to notify any person or entity of such change.
Returned or Damaged Goods
Do not return goods without the prior authorization from Labconco. Unauthorized returns will not be
accepted. If your shipment was damaged in transit, you must file a claim directly with the freight carrier.
Labconco Corporation and its dealers are not responsible for shipping damages.
The United States Interstate Commerce Commission rules require that claims be filed with the delivery
carrier within fifteen (15) days of delivery.
Limitation of Liability
The disposal and/or emission of substances used in connection with this equipment may be governed by
various federal, state, or local regulations. All users of this equipment are required to become familiar with
any regulations that apply in the user’s area concerning the dumping of waste materials in or upon water,
land, or air and to comply with such regulations. Labconco Corporation is held harmless with respect to
user’s compliance with such regulations.
Contacting Labconco Corporation
If you have questions that are not addressed in this manual, or if you need technical assistance, contact
Labconco’s Customer Service Department or Labconco’s Product Service Department at 1-800-821-5525
or 1-816-333-8811, between the hours of 7:00 a.m. and 6:00 p.m., Central Standard Time.
Part #3892500, Rev. B
ECO J457
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ORIGINAL INSTRUCTIONS
TABLE OF CONTENTS
CHAPTER 1: INTRODUCTION 1
Typographical Conventions 1
CHAPTER 2: PREREQUISITES 3
Location and Air Current Requirements 3
Exhaust and Blower Requirements 4
Electrical Requirements 4
TXE Connected to Building Exhaust 4
Space Requirements 4
CHAPTER 3: GETTING STARTED 5
Unpacking the Enclosure 6
Installing the TXE on a Supporting Structure 6
Connecting to the Exhaust System 8
Installation of HEPA Filters 10
Connecting the Electrical Supply Source to the TXE 10
Set the Face Velocity with the Speed Control Adjustment 12
CHAPTER 4: HIGH PERFORMANCE FEATURES AND
SAFETY PRECAUTIONS 13
High Performance Features 13
Safety Precautions 16
CHAPTER 5: USING YOUR TXE 19
Routine Daily Work Procedures 19
HEPA Filter Applications, Suitability and Guidelines 20
Prohibited Acid Use 20
CHAPTER 6: MAINTAINING YOUR TXE 21
Routine Maintenance Schedule 21
Determination of When to Replace HEPA Filters 22
How to Install a New HEPA Filter with Bag-In/Bag-Out Procedure 22
HEPA Filter Leak Test 24
Setting the Inflow Face Velocity with the Speed Control Adjustment 25
Calibrate and Operate the Airflow Monitors 26
Guardian Digital 1000 Airflow Monitor 29
Programming the Guardian 1000 Digital Alarm 29
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Chapter 1: Introduction
Initial Certification 32
Re-Certification 32
Fluorescent Light Replacement 32
Motorized Impeller Replacement 33
Speed Control Replacement 35
CHAPTER 7: ACCESSORIES 36
CHAPTER 8: TROUBLESHOOTING 38
APPENDIX A: REPLACEMENT PARTS 41
APPENDIX B: DIMENSIONS 43
APPENDIX C: SPECIFICATIONS 44
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1
!
Chapter 1:
Introduction
Congratulations on your purchase of a Labconco TXE. Your enclosure provides
personnel protection through superior containment. It is the result of Labconco’s
more than 50 years of experience in manufacturing fume hoods and more than 30
years of experience in manufacturing filtered enclosures.
These enclosures will effectively contain toxic or noxious particulates when
properly installed and operated. Each enclosure uses a single HEPA filter, which
is rated at least 99.99% efficient for 0.3-micron particles. The TXE offers many
unique features to enhance safety, performance, and energy savings. To take full
advantage of them, please acquaint yourself with this manual and keep it handy for
future reference. If you are unfamiliar with how high performance HEPA filtered
enclosures operate, please review Chapter 4: High Performance Features and
Safety Precautions before you begin working in the enclosure. Even if you are an
experienced user, please review Chapter 5: Using Your HEPA Filtered Enclosure,
which describes the TXE features so that you can use the filtered enclosure
efficiently.
If the unit is not operated as specified in this manual it may
impair the protection provided by the unit.
Si l'unité n'est pas utilisée comme spécifié dans ce manuel il
peut diminuer la protection fournie par l'unité.
Typographical Conventions
Recognizing the following typographical conventions will help you understand and
use this manual:
Steps required to perform a task are presented in a numbered format.
Comments located in the margins provide suggestions, reminders, and
references.
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Chapter 1: Introduction
2
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!
Critical information is presented in boldface type in paragraphs that are
preceded by the exclamation icon. Failure to comply with the information
following an exclamation icon may result in injury to the user or permanent
damage to the enclosure.
Critical information is presented in boldface type in paragraphs that are
preceded by the wrench icon. A trained certifier or contractor should only
perform these operations. Failure to comply with the information following a
wrench icon may result in injury to the user or permanent damage to your
hood.
Important information is presented in capitalized type in paragraphs that are
preceded by the pointer icon. It is imperative that the information contained in
these paragraphs be thoroughly read and understood by the user.
CAUTION – See Manual. When this symbol is on the unit it indicates a
caution that is detailed in this manual.
ATTENTION - Voir manuel. Lorsque ce symbole est sur l'unité, il indique une
mise en garde qui est indiqué dans ce manuel.
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Chapter 2:
Prerequisites
Before you install the TXE, you need to prepare your site for installation. You
must be certain that the area is level and of solid construction. In addition, a
dedicated source of electrical power should be located near the installation site to
power the TXE, balance and other apparatus. Additionally, the enclosure should
be strategically placed in the lab to provide efficient workflow.
Carefully read this chapter to learn the requirements for your installation site:
The location and air current requirements.
The exhaust and blower requirements.
The electrical power requirements.
The space requirements.
Refer to Appendix B: Dimensions for complete enclosure dimensions.
Refer to Appendix C: Specifications for complete TXE electrical and
environmental conditions, specifications and requirements.
Location and Air Current Requirements
The TXE has been designed to contain hazards by negating typical cross drafts and
turbulence within the opening. As a precautionary safety measure and a higher
level of quality management, it is recommended that the enclosure be placed in an
area to avoid:
High traffic areas where walking might cause an air disturbance or be a
nuisance to balance readings.
Overhead or wall HVAC diffusers, fans, radiators or other lab equipment
producing air currents.
Next to doorways or windows that may be opened.
Do not position the unit so that it is difficult to operate the main
disconnect device.
Ne placez pas l'appareil de sorte qu'il est difficile de faire
fonctionner le dispositif principal de déconnexion.
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Chapter 2: Prerequisites
4
Enclosur
e Width
Model
Description
Face Velocity
(fpm)
Exhaust
Volume
(CFM)
TXE Pressure
Loss with
HEPA filter (in
w.g.)
TXE Noise
Pressure db
(A)
TXE Max.
Equivalent
Resistance (Ft)
TXE Max.
External Static
Pressure
2 FT 2' TXE
80
100
115
145
.48" - .57"
.62" - .72"
50-56
53-58
200
80
.18"
.13"
!
Exhaust and Blower Requirements
The TXE uses an integral motorized impeller to draw room air past the operator
and through the enclosure. This contaminated air is then pushed through the
HEPA filter. The HEPA-filtered exhaust air is then forced out the top of the
enclosure.
The HEPA-filtered exhaust air can be recirculated into the laboratory or exhausted
outside with the addition of the Canopy Exhaust Connection and remote blower
listed in Chapter 7. Electrical connections are covered in Chapter 2 for this
configuration.
Data for the exhaust volume, noise pressure and enclosure static pressure loss are
listed for the TXE at face velocities of 80 and 100 fpm.
Proper blower selection can be determined from these exhaust requirements and the
total system static pressure loss. For outside exhaust, the enclosure must be
connected to either a dedicated blower or a house exhaust system. Labconco offers
accessory remote blowers listed in Chapter 7. Contact Labconco for blower sizing
assistance.
If the enclosure is connected directly to a house exhaust system, an
adjustable damper (or valve) must be installed to control the airflow
properly. This is equally important when a house exhaust system is
controlling multiple filtered enclosures. See Chapter 7 for accessory
adjustable damper ordering information.
Electrical Requirements
Standard duplex electrical receptacles should be nearby for connecting the TXE or
other equipment. The enclosure includes pass-thrus to allow electrical cords through
the back of the enclosure without leaving a large hole for contaminants to escape.
TXE Connected to Building Exhaust
There is no provision for controlling a remote blower for exhausting air from the TXE.
One way to do this, however, is to have a certified electrician connect a wall mounted
switch receptacle nearby so that the switch controls both the remote blower and the
receptacle. The power cord for the TXE is then plugged into this receptacle.
Space Requirements
The dimensions for the different models are shown in Appendix B: Dimensions.
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Chapter 3:
Getting Started
Now that the site for your TXE is properly prepared, you are ready to unpack,
inspect, install, and validate your system. Read this chapter to learn how to:
Unpack and move the enclosure.
Set up the enclosure with the proper supporting structure.
Installation of HEPA filters.
Connect the electrical supply.
Set the face velocity with the speed control adjustment.
Arrange validation for the enclosure.
Each TXE model weighs approximately 213 lbs (79 kg). If you
must lift the enclosure manually, follow safe lifting guidelines.
The TXE may be “top-heavy,” keep the enclosure vertical.
NEVER attempt to put any lifting force on the front doors!
Secure the glass doors with tape whenever moving or lifting the
enclosure.
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Chapter 3: Getting Started
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The United
States
Interstate
Commerce
Commission
rules require
that claims be
filed with the
delivery
carrier within
fifteen (15)
days of
delivery.
Unpacking the Enclosure
Carefully remove the shrink-wrap or carton on the enclosure and inspect it for
damage that may have occurred in transit. If damaged, notify the delivery carrier
immediately and retain the entire shipment intact for inspection by the carrier.
DO NOT RETURN GOODS WITHOUT THE PRIOR
AUTHORIZATION OF LABCONCO. UNAUTHORIZED
RETURNS WILL NOT BE ACCEPTED.
IF ENCLOSURE WAS DAMAGED IN TRANSIT, YOU MUST
FILE A CLAIM DIRECTLY WITH THE FREIGHT CARRIER.
LABCONCO CORPORATION AND ITS DEALERS ARE NOT
RESPONSIBLE FOR SHIPPING DAMAGES.
Do not discard the packing material until you have checked all of the components
and tested the enclosure. We recommend that you do not remove the enclosure
from its shipping container until it is ready to be placed into its final location.
Move the unit by placing a flat, low dolly under the shipping skid, or by using a
floor jack.
Do not move the enclosure by tilting it onto a hand truck.
Installing the TXE on a Supporting Structure
When installing the enclosure onto a supporting structure benchtop, ensure that the
structure can safely support the combined weight of the enclosure and any related
equipment.
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7
Fasten the mounting brackets to
the underside of the work surface
with hardware provided.
Use screws provided to drill and
fasten the bracket to the inside of
the tubing of the stand.
Align the front edge of the
enclosure with the front edge
of the stand.
Figure 3-1
TXE Installation
Chapter 3: Getting Started
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Chapter 3: Getting Started
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Connecting to the Exhaust System (Optional)
ATTENTION: The weight of the exhaust ductwork system must
be supported independently of the enclosure superstructure or
damage may occur.
The exhaust system should be installed by a qualified HVAC
contractor.
The exhaust connection on the TXE has been designed to accept 6" diameter
ductwork as shown in Figure 3-2. The exhaust connection ships uninstalled and
needs to be fastened with the screws provided. See Chapter 7 for ordering Canopy
Exhaust Connection for the TXE. Canopy Exhaust Connection aids in the removal
of chemicals or odors not captured by HEPA filters. Review Chapter 2 for exhaust
prerequisites and review Chapter 7 for ordering blower exhaust equipment.
Consult Labconco Customer Service should you require help sizing your blower
for the exhaust volume and system static pressure loss.
To ensure compatibility, the selected exhaust duct material
should match the enclosure, procedures and chemical
applications.
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9
Figure 3-2
TXE Exhaust Connection
Chapter 3: Getting Started
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Chapter 3: Getting Started
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Installation of HEPA Filters
HEPA filters are shipped installed with the gasket on the downstream side. The
HEPA filters are leak checked at Labconco. A second leak check is recommended
before using the enclosure and at least annually thereafter. Consult your Safety
Officer and Chapter 6 for the HEPA Filter Leak Test and HEPA Filter Bag-In/BagOut Procedure. See Figure 4-2 for HEPA filter location, HEPA filter gasket, filter
clamp bolts, and bag-in/bag-out flange. The TXE has a true bag-in/bag-out HEPA
filter to safely dispose of the filter. All seams upstream of the HEPA filter are
jacketed by negative pressure. This intrinsically safe design ensures containment.
Connecting the Electrical Supply Source to the TXE
115V Models
Simply connect the 115V power cord supplied to the IEC electrical supply plug on
the back of the enclosure.
For the remote blower used for the TXE, follow the wiring diagram on the
enclosure and wire the blower wires in the electrical junction box located behind
the front panel. These wires are switched by the electrical relay via the blower
switch.
The maximum circuit load for the electrical relay is 6 amps. Only the remote
blower wiring is connected inside the electrical junction box. The lights and
airflow monitor are powered from a standard duplex electrical receptacle located
nearby for connecting the power cord. All wiring for the TXE should be
performed by a licensed electrician and conform to local codes. In most cases, the
TXE will require the use of shielded conduit to protect the wiring.
See Figure 3-3. The grounding connection shall not be made to the terminal box
cover. The building electrical supply system for the remote blower should include
overload protection such as a switch or circuit breaker in close proximity and
within easy reach of the operator. The switch or circuit breaker shall be marked as
the disconnecting device. Consult NEC-2002 for proper installation.
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Chapter 3: Getting Started
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Figure 3-3
TXE Conduit Location for Wiring External Remote Blower
230V Models
The same procedure applies for the 230V except it is shipped without a plug.
Install the appropriate plug for your electrical specifications per local codes. If
using at 50 Hz operations, blower performance maximum airflow will be reduced
by 17%.
Do not use any detachable power cord that is not adequately rated
for the unit.
Ne pas utliser un fil électrique amovible qui n’est pas du tension
nominale de l’appareil.
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Chapter 3: Getting Started
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Set the Face Velocity with the Speed Control
Adjustment
The adjustment of the speed control gives the correct face velocity and is located
behind the front panel. The face velocity should be adjusted between 80 and 100
fpm. (Consult your Safety Officer for airflow recommendations for your
application). Containment is maximized at a setting within this range. Working at
the lowest face velocity appropriate for the application will give the quietest
operation. Face velocity measurements are made using an anemometer. An
electric anemometer can be obtained from your laboratory supply dealer. Face
velocity measurement should be taken as an average of several readings in the
largest of openings with the glass doors closed. Using a small Phillips
screwdriver, adjust the speed control to give the required face velocity. See
Figures 6-1 and 6-2 in Chapter 6 to locate the speed control. The face velocity is
increased by turning the speed control counter clockwise and clockwise to
decrease face velocity.
NOTE: Face velocity profiles and smoke testing should be
performed frequently per your organization’s quality system to
ensure safe performance.
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13
Chapter 4:
High Performance Features and
Safety Precautions
High Performance Features
The TXE is designed to meet the needs of the laboratory scientist to contain
powders produced while using processing or analysis equipment. The TXE’s have
been tested to effectively contain toxic particulate when properly installed and
operated. The rear perforated baffles work to produce horizontal airflow patterns
that significantly reduce particulate concentrations through the work area.
These concentrations of materials are predominantly removed on the “first pass” of
airflow resulting in high performance containment. The plenum and the HEPA
filter are jacketed by negative pressure. Should a leak occur in the filter gasket or
the plenum, the contaminated air is recaptured and refiltered.
The TXE includes a true bag-in/bag-out HEPA filter disposal system to protect the
worker from contact with hazardous powders and particulates. Users of both
products are encouraged to routinely check airflow with an airflow monitor.
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Chapter 4: Performance Features and Safety Precautions
14
7
11
4 & 10
4 & 10
3 8 2
1
5
12
14 9 15
6
13
Figure 4-1
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Chapter 4: Performance Features and Safety Precautions
15
1. Zoned Rear Perforated Baffle directs horizontal laminar air streams to
the three-zoned sections of the perforated baffle. The three-zoned sections
have increasingly more open area at the bottom that help form laminar
airflow. This minimizes the potential for air to roll forward preventing
contaminants from moving toward the front opening. The majority of
contaminants are captured and removed on the first pass through the
enclosure. Rear perforated baffles may be tilted or removed for ease in
cleaning.
2. Utility Ports allows electrical cords and data cords to pass through the
back of enclosure without leaving a large hole for contaminants to escape.
3. Accessory Guardian Airflow Monitor or Guardian™ 1000 Digital
Airflow Monitor continuously monitors airflow. An audio/visual alarm
alerts the user to low airflow conditions. The Guardian 1000 Digital
Airflow Monitor also displays a face velocity value, provides an RS232
output, a night setback mode and several auxiliary relay ports. Both
airflow monitors are available options on all TXE models.
4. Adjustable Doors provide full access to the enclosure’s interior. The
support collars under each door allow some minor adjustments vertically to
facilitate applications with equipment.
5. Vibration-Isolated Motorized Impeller has vibration isolation supports,
which eliminate transfer of vibration to the work surface.
6. Speed Control regulates the speed of the motorized impeller and is used
by the certifier to validate and adjust the inflow velocity. Located behind
the front panel.
7. Fluorescent Lamp is located above the work area, out of contact with
contaminated air.
8. Filter System Pressure Gauge indicates the total system pressure across
the HEPA filter and pressurized plenum to help predict HEPA filter
loading.
9. Filter Clamping Bolt evenly seals the HEPA filter to the frame of the
enclosure.
10. Access Doors. The doors are constructed of tempered safety glass. Doors
pivot out for loading and cleaning.
11. Control Panel. The control panel, which is located above the sash,
contains the filter system pressure gauge and control switches.
12. HEPA (High Efficiency Particulate Air) Filter is rated to remove
99.99% of all particles 0.3 micron in size. See Figure 4-2. HEPA filters
listed in Chapter 3 and 7.
13. Lamp Ballast (Not Shown) for the fluorescent lamp is located behind the
control panel.
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Chapter 4: Performance Features and Safety Precautions
16
14. Accessory Caonopy Exhaust Connection is available to duct integral
blower models including the TXE to the outside. The Canopy Exhaust
Connection allows the operator protection from hazardous, fumes or vapors
not captured by particulate filters.
15. HEPA Filter Access Port to access HEPA filter during filter changing
procedures. For harmful powders and particulates, the true bag-in/bag-out
procedure is used to properly dispose of the contaminated HEPA filter.
Safety Precautions
1. Although the enclosure has been engineered to maintain optimum operator
safety, caution should always be used while working. Prior to using the
enclosure, check to make sure that the exhaust blower is operating and that
air is entering the enclosure at its specified face velocity. The use of an
airflow monitor is recommended to alert the user to a problem with airflow.
2. Use good housekeeping in the enclosure at all times. Clean up spills
immediately. Periodically clean enclosure interior.
3. Do not overload the work surface with apparatus or work material. The
safe operation of the enclosure is based upon having proper airflow through
the structure.
4. Blocking large portions of the rear baffle will change the airflow pattern in
the enclosure causing turbulence. (Do not install equipment against the
rear baffle, as this will affect airflow).
5. Do not work in this enclosure without the exhaust system running.
6. Applications involving acid use in this enclosure is prohibited.
7. Radioisotope materials are prohibited in this enclosure. Consult your
Safety Officer.
8. Avoid cross drafts and limit traffic in front of the enclosure. Air
disturbances created may draw contaminants out of the enclosure.
9. A qualified certification technician should test the enclosure before it is
initially used. The enclosure should be validated whenever it is relocated.
10. The use of safety goggles, protective clothing, gloves and any other
personal protective equipment recommended by your safety officer should
be used.
11. The doors should remain closed during particulate generating processes.
12. The enclosure should be recertified whenever it is serviced or at least
annually thereafter.
13. The HEPA filter provides personnel and environmental protection from
particulate matter. Because room air is drawn into the work area during
operation, this enclosure should not be used for operations requiring
product protection from environmental contamination.
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Chapter 4: Performance Features and Safety Precautions
17
14. Avoid the use of flammable gases or solvents in the enclosure if possible.
Care must be taken to ensure against the concentration of flammable or
explosive gases or vapors. Use of an open flame should be avoided in the
enclosure. Open flames may disrupt the airflow patterns in the cabinet,
burn the HEPA filter and damage the filter’s adhesive. Gases under high
pressure should not be used in the enclosure as they may disrupt the airflow
patterns of the cabinet.
15. HEPA filters are only effective for entrapment of particulate matter.
Manipulations that generate gases or vapors from toxic chemicals or
radionuclides, must be evaluated carefully from the standpoint of buildup
to dangerous levels, the decontamination of the enclosure and compliance
with applicable regulations.
16. The surface of the HEPA filter is fragile and should not be touched. Care
must be taken to avoid puncturing the HEPA filter during installation or
normal operation. If you suspect that a HEPA filter has been damaged DO
NOT use the enclosure; contact a local certification agency or Labconco.
17. The HEPA filter in the enclosure will gradually accumulate airborne
particulate matter from the room and from work performed in the
enclosure. The rate of accumulation will depend upon the cleanliness of
the room air, the amount of time the enclosure is operating and the nature
of work being done in the enclosure.
18. Ensure that the TXE is connected to an electrical service in accordance
with local and national electrical codes. Failure to do so may create a fire
or electrical hazard. Do not remove or service any electrical components
without first disconnecting the filtered enclosure from electrical service.
19. Increase the face velocity by adjusting the speed control of the motorized
impeller on the TXE or change the HEPA filter when the face velocity falls
below acceptable limits established by your Safety Officer.
20. HEPA filters are disposed as hazardous waste. The user is responsible for
recording the chemicals adsorbed or treated by the filters and disposing
properly. HEPA filters should be disposed using the disposal bag on the
TXE.
21. Ensure only trained operators use the enclosure. New users should review
the User’s Manual and become familiar with the operation of the enclosure.
22. Proper operation of the enclosure depends largely upon the enclosure
location and the operator’s work habits. The enclosure should be located
away from traffic patterns, doors, fans, ventilation registers, fume hoods,
and any other air-handling device that could disrupt its airflow patterns.
Consult Chapter 2: Prerequisites and Chapter 3: Getting Started sections of
this manual for further details.
23. Leave the blower on for at least one minute after work in the enclosure has
been completed.
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Chapter 4: Performance Features and Safety Precautions
18
24. If a chemical, powder or particulates are spilled on the work surface, DO
NOT switch off the blower until all traces have been removed.
25. Tag enclosures with appropriate warning, if filters have been removed for
service.
26. If the blower fails during use, processes should cease and the area should
be vacated and ventilated.
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19
Chapter 5:
Using Your TXE
Now that the installation is completed, you are ready to use your TXE.
Read this chapter to learn about:
Routine Daily Work Procedures.
Appropriate HEPA Filter Applications, Suitability and Guidelines.
Definition of Terms.
Prohibited Acid Use.
Routine Daily Work Procedures
Planning
Thoroughly understand procedures and equipment required before
beginning work.
Start-up
Turn on exhaust system and light.
Check the baffle air slots for obstructions.
Allow the enclosure to operate unobstructed for 1 minute.
Wear a long sleeved lab coat and rubber gloves. Use protective eyewear.
Wear a protective mask if appropriate. Consult your Safety Officer for
additional personal protective equipment recommendations.
Work Techniques
Doors should be closed for powder generating processes.
Avoid using techniques or procedures that disrupt the airflow patterns of
the enclosure.
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Chapter 5: Using Your TXE
20
Final Purging
Upon completion of work, the enclosure should be allowed to operate for
two to three minutes undisturbed, to purge airborne contaminants from the
work area before shutting down the blower.
Unloading Materials and Equipment
Objects in contact with contaminated material should be surface
decontaminated before removal from the enclosure.
HEPA Filter Applications, Suitability and Guidelines
The HEPA TXE provides personal and environmental protection from
particulate matter, hazardous powders and biohazardous materials. Because
room air is drawn through the enclosure during operation, this enclosure
should not be used for operations requiring sample protection from
environmental contamination.
HEPA filters are only effective for entrapment of particulate matter, hazardous
powders and biohazardous materials. Manipulations that generate gases or
vapors, i.e., toxic chemicals or radionuclides, require the use of a HEPA and
carbon filter. The surface of the HEPA filter is fragile and should not be
touched. Care must be taken to avoid puncturing the HEPA filter during
installation. If you suspect that a HEPA filter has been damaged, DO NOT
use the enclosure. See Chapter 6 for replacing the HEPA Filter or using a BagIn/Bag-Out Disposal Bag.
The HEPA filter will gradually accumulate airborne particulate matter from
the room and from work performed in the enclosure. The rate of accumulation
will depend upon the cleanliness of the room air, the amount of time the
enclosure is operating, and the nature of work being done.
The TXE is provided with a HEPA filter. For powders and particulates follow
the HEPA Filter Bag-In/Bag-Out procedure in Chapter 6 for disposal
instructions. For biohazardous materials, follow the Decontamination
Procedure in Chapter 6 for disposal instructions.
Prohibited Acid Use
The TXE motorized impeller cannot be exposed to acids. Where applications
require the use of acids, a separate ventilated enclosure or vented fume hood
should be used with a remote blower ducted to the outside. No exceptions are
permitted, as the impeller life span will be limited with acid use.
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21
Chapter 6:
Maintaining Your TXE
Monitoring airflow and changing the filters is the primary maintenance required.
Decontamination may be required and is reviewed in Chapter 6.
Review this chapter on maintenance for the following:
Routine Maintenance.
Determination of when to replace the HEPA filters.
How to install a new HEPA filter with the bag-in/bag-out procedure.
HEPA filter leak test.
Speed control adjustment and setting the inflow face velocity.
Operating and calibrating the airflow monitors.
Initial certification.
Re-certification.
Fluorescent light replacement.
Motorized impeller replacement.
Speed control replacement.
Routine Maintenance Schedule
Daily or Weekly
Wipe down the interior surfaces of the enclosure with a disinfectant or
neutralizing cleaner, depending upon the usage of the unit and allow to dry.
Using a damp cloth, clean the exterior surfaces of the enclosure,
particularly the front and top to remove any accumulated dust.
Operate the exhaust system, noting the airflow velocity through the
enclosure using a source of visible smoke. Airflow monitors are
recommended for constant monitoring.
Monthly (or more often as required)
Determine the actual face velocity through the sash openings of the
enclosure where the average reading should be at the specified velocity.
(Use calibrated thermal anemometer or other approved apparatus). Airflow
alarms are recommended for constant monitoring.
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Chapter 6: Maintaining Your TXE
22
!
Annually
Replace the fluorescent lamps.
Have the enclosure validated by a qualified certification technician. See
Certification and Recertification in Chapter 6.
Determination of When to Replace HEPA Filters
The HEPA filters in the TXE gradually accumulate airborne particulate matter and
powders from the enclosure and room. The rate of accumulation will depend upon
the cleanliness of the room air, the amount of time the enclosure is operating, and
the nature of work being done in the enclosure. In typical installations and usage,
the HEPA filters will last two to five years before requiring replacement. Replace
HEPA filters when face velocity in the largest opening between doors drops below
the recommended 80-100 fpm velocity, and the speed control is adjusted to full
speed. Replace HEPA filters if it fails the HEPA Filter Leak Test in Chapter 6.
How to Install a New HEPA Filter with the
Bag-In/Bag-Out Procedure
The TXE includes a true bag-in/bag-out filter disposal system for safely removing
the HEPA filter and protect the worker from toxic powders and particulates. See
Figures 6-1 for the Bag-In/Bag-Out Procedure. For your safety, wear appropriate
personal protective equipment during the change of HEPA filters.
Do NOT contact blower wheel while still in motion.
NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.
1. With the enclosure OFF, remove the front panel secured by two screws on
top of the enclosure.
2. Remove the bungee cords and retaining strap on the bag and extend it out.
The retaining strap provides an extra level of safety even though the
enclosure is under negative pressure when the blower is on.
3. Loosen the two filter clamp bolts with a 9/16" socket securing the HEPA
filter. See Figure 4-1 and 4-2.
4. Place both arms in the rear gloves of the bag, and carefully draw the HEPA
filter out of the enclosure. Rest the HEPA filter on the floor, table or cart.
Remove arms from bag gloves.
5. Create two seals between the enclosure bag access port and the old HEPA
filter. Seals can be heat sealed or sealed with tie wraps. Cut off the bag
between the two seals and leave the bag stub on the access port to the
enclosure.
6. Place the new HEPA filter in the new bag. Then place the new bag and
new HEPA filter over the old bag stub and onto the enclosure access port.
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Chapter 6: Maintaining Your TXE
23
Old HEPA
Filter
New HEPA
Filter
Old HEPA filter
sealed in old bag
Create two seals and
cut here after sealing
Bag stub from
old bag
Old bag stub
sealed in glove
of new bag.
Create two
seals and cut
here after
sealing
New HEPA
filter shown in
new bag
Filter gasket
up as shown
7. Carefully remove the old bag stub using the single glove near the access
port. Reattach the retaining strap on the perimeter of the new bag at the
enclosure access port. Draw the old bag stub into the single glove and turn
the glove inside out. Double seal this glove and cut off the glove with the
contaminated bag stub inside.
8. Carefully install the new HEPA filter and uniformly tighten the two filter
clamp bolts until the HEPA filter gasket is compressed 50%.
9. Carefully fold and roll the new bag in four-inch pleats and push the bag
into the access port. Reinstall the retaining strap and bungee cords. Turn
the enclosure ON to draw a vacuum on the bag. Reinstall the front panel.
Figure 6-1
Bag-In/Bag-Out HEPA Filter Changing Procedure Diagram & Filter
Leak Test Diagram
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Chapter 6: Maintaining Your TXE
24
HEPA Filter Leak Test
Purpose
After installing the new HEPA filter, the HEPA filter should be leak checked.
This test is performed to determine the integrity of the HEPA filter, the filter
housing, and the filter mounting frames. Leak testing is to be done by a qualified
technician with calibrated equipment. Remove the top perforated exhaust cover by
using a Phillips screwdriver to unfasten the (2) screws used to secure (2) clips. See
Figure 6-1. The filter passes the leak test at .01% or better. Reference Leak
Testing and Photometer scanning from the Institute of Environmental Services
(IES-RP-CC001.3)
Apparatus
1. An aerosol photometer ATI model 2D, 2E, 2G or equivalent. Air
Techniques Hamilton Associates inc. 11403 Cron Ridge Dr. Owings Mills,
MD 21117
2. One aerosol generator of the Laskin nozzle(s) type. An aerosol of mineral
oil or suitable liquid shall be created by flowing air through it. The compressed
air supplied to the generator should be adjusted to a pressure of 10± 1 psig.
during operation. Air Techniques Inc. Model TDA-4A or equal. One nozzle at
10 psig is (67.5 cfm x 100ug/l)/(Vol. of air), For the 2' at 90 fpm or 130 cfm,
one nozzle @10 psig is 6,750/130 cfm = 52 ug/l. For the 3' at 90 fpm or 200
cfm, one nozzle @ 10 psig is 34 ug/l. For the 4' at 90 fpm or 265 cfm, one
nozzle at 10 psig is 26 ug/l. For the 5' at 90 fpm or 215 cfm, one nozzle at 10
psig is 31 ug/l. For the 6' at 90 fpm or 260 cfm, one nozzle at 10 psig is 26
ug/l. Note 5' and 6' use two filters.
3. Mineral oil (Catalog #1491400).
4. Sampling Nozzle, Rectangular 1/2" x 3-1/4", Air Techniques, Inc.
Procedure
For the ATI 2G Photometer
1. Turn on the photometer and allow it to operate for a minimum of 5 minutes.
Leave the valve in the “CLEAR” setting.
2. Press the “ENTER” keypad. Press the “REF” keypad.
3. The display will display “P1” for approximately 1 second, and then display a
numerical value.
4. Using the “^” or “ν” keypads, respectively, increase or decrease the numerical
value until it equals 52 (2'), 34 (3'), 26 (4'), 31 (5'), 26 (6') for the enclosure at
90 fpm inflow velocity.
5. Press the “ENTER” Keypad. The photometer will scan for 15 seconds, and then
the “0” keypad will flash. Press the “Enter” keypad. The unit will scan for 5
seconds, the display will read “0000,” and the unit will sound a confirming tone.
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Chapter 6: Maintaining Your TXE
25
6. Set the valve to “DOWNSTREAM.” Place the palm of your hand over the
sampling port of the pistol. There should be a strong vacuum at this port. If the
vacuum is weak, contact Air Techniques Hamilton Associates.
7. Turn the enclosure on and let it operate for a minimum of 5 minutes.
8. If necessary, adjust the speed control of the enclosure to maintain the following
airflows at 90 fpm; 2' (130cfm), 3' (200 cfm, 4' (265 cfm.), 5' (215 cfm), 6'
(260 cfm). The 5' and 6' uses two filters.
9. Position the aerosol generator discharge in the intake of the baffle inside the
enclosure.
10. Start the aerosol generator (Pressure to be +/- 1 psig). (10 psig). Ensure that
one Laskin nozzle is in the “open” position.
11. Allow the generator to operate for a minimum of 15 seconds. For all integral
motorized impeller models, scan the downstream exhaust side of the HEPA
filter by passing the sampling nozzle of the gun in slightly overlapping strokes
over the entire surface the filter, with the sampling port not more than 1 inch
from the surface of the filter media. Scan the entire periphery of the filter and
the gasket between the filter frame and the enclosure frame. Scanning shall be
done at a traverse rate of not more than 2 inches per second.
Acceptance
Aerosol penetration shall not exceed 0.01 percent measured by the photometer.
Setting the Inflow Face Velocity with the Speed
Control Adjustment
1. Remove the front panel by loosening the (2) Phillips screws on top that
secure the front panel.
2. The speed control is located on the electrical subassembly located behind
the switched control panel and below the front panel. See Figure 6-1.
3. Adjust the speed control with a small Phillips screwdriver by turning the
screw counterclockwise to increase blower speed or clockwise to decrease
the blower speed. The speed control is very sensitive, so proceed with
caution.
4. Measure the inflow velocity by averaging measurements taken in the
largest opening between doors and adjust the speed control slowly for the
desired speed. Allow the speed to stabilize and re-measure the inflow
velocity to confirm. (Recommended inflow is 80-100 ft/min.)
5. Replace the front panel and tighten the screws.
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Chapter 6: Maintaining Your TXE
26
Calibrate and Operate the Airflow Monitors
Option
Guardian Airflow Monitor (LED Monitor)
Refer to Figure 6-2 for operation and calibration.
Labconco Airflow Monitor / Airflow Switch Operation
The Guardian Airflow Monitor (LED) consists of a circuit board and an airflow
switch. This switch indicates airflow as safe or low. It does not provide an actual
face velocity, but a small setscrew in the back of the sensor can adjust the airflow
level that it classifies as “good/safe” or “low/alert.”
The circuit board provides power to the sensor and also contains a “safe (green)”
and “alert (red)” airflow LED indicators, as well as a “SILENCE ALARM” button
to quiet the audio alarm. When first powered up, the PCB will light both red and
green LED indicators and sound the alarm to indicate it is working. After 5
seconds, the air monitor will indicate either good or bad airflow based on what the
connected airflow switch detects. For low airflow, the unit will wait for 10
seconds of bad indications before it sounds both the audio alarm and the red “alert”
LED indicator. If the “SILENCE ALARM” button is pressed, the audio alarm will
be silenced, but the red “alert” LED will remain on. The alarm is silenced
indefinitely unless an airflow change is detected. If safe airflow is later detected
for 10 seconds, the green “safe” LED will be lit and the “alert” (red) LED will be
shut off. At any time the airflow is safe/good, one can press the SILENCE
ALARM test button and the audio alarm and the red LED will turn on as long as
this button is held down. The PCB has also a two-pin connector for use as an
external output with isolated relay contacts that close when the red/alert LED is lit
(low airflow). These relay contacts are not affected by the “SILENCE ALARM”
button.
The PCB is mounted behind the front panel using standoffs and an appropriate
label is used to highlight the “SILENCE ALARM” button with clear areas for the
red and green LED’s. No holes to allow sound to be broadcast louder are
necessary.
The PCB can be prepared as a factory special with an additional connector for the
following external inputs, and having the following possible functions:
External Alarm allows an external signal to sound the alarm, such as a sash
open switch, or a “fail” signal from the building airflow system.
Alarm Disable allows an external signal to prevent a “low” airflow alarm from
occurring.
Night Setback allows an external signal to prevent a “low” airflow alarm from
occurring (not any different from Alarm Disable above other than the
terminology.)
Contact Labconco for ordering information on this special PCB.
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Chapter 6: Maintaining Your TXE
27
Enclosure Operating In-Flow
Speed
Alarm Condition Set Point
Speed
100 ± 10 fpm
70-90 fpm
90 ± 10 fpm
60-80 fpm
80 ± 10 fpm
50-70 fpm
Calibration
1. Ensure the flow switch and alarm circuit board are installed and
operational.
2. Allow the enclosure to operate for at least two minutes.
3. If factory installed, the monitor will alarm at 60±10 fpm with the inflow
velocity set at 90±10 fpm.
4. To change the factory setting, set the inflow velocity required by your
Safety Officer to the desired alarm condition using the speed control
adjustment procedure outlined in Chapter 6.
5. Once the alarm condition is set, use a small screwdriver to turn the
adjustment screw on the airflow switch counterclockwise (facing the
screw) until the “low” airflow red LED lights and the audible flow alarm
sounds.
6. Adjust the inflow velocity to the nominal operating point required by your
Safety Officer.
7. Over time the HEPA filter will load and eventually slow the inflow
velocity. Once the alarm condition is met, simply increase the speed
control outlined in Chapter 6 or replace the HEPA filter if the speed control
is maximized.
8. The table below lists typical alarm conditions based on normal operating
conditions. Typical alarm conditions are set at face velocities of 10 to 30
feet per minute below the normal operating conditions due to supply air
and exhaust air fluctuations, as well as room air cross drafts. Consult your
Safety Officer for proper operating speeds.
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Chapter 6: Maintaining Your TXE
28
Figure 6-2
Guardian Airflow Monitor (LED) with Airflow Switch
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Chapter 6: Maintaining Your TXE
29
Low Air Alarm
Set Point
(user defined)
Enclosure
Operating
Inflow Speed
Low Calibration
Set Point
(user defined)
High Calibration
Set Point
(user defined)
60 – 70 fpm
80 fpm
50 – 90 fpm
100 – 150 fpm
80 - 90 fpm
100 fpm
50 – 110 fpm
100 – 170 fpm
Guardian Digital 1000 Airflow Monitor
Option
Refer to Figure 6-3 for operation and calibration. Refer to the separate Labconco
1000 Alarm Manual for detailed information.
Operation
The Guardian Digital Airflow Monitor consists of the airflow sensor, the Alarm Unit,
and the 15 VDC power supply. For 115V operation the alarm unit is powered by
plugging the power supply into the factory-prepared digital airflow monitor socket.
For 230V operation, the Alarm Unit is powered by plugging the power supply into a
building outlet. The alarm has “Enter,” “+,” and “-” buttons to program the monitor.
There is also a green LED “SAFE,” yellow LED “CAUTION,” and red LED “LOW”
with audible alarm for airflow conditions. The audible alarm can be permanently
muted if desired. The Guardian Digital 1000 Airflow Monitor displays a face
velocity value, provides an RS232 communications port to a PC or building computer
system, can be configured for external input connections such as night setback or
external alarm and provides up to three output relays that can be configured. For
complete detailed information, please refer to the separate Labconco 1000 Alarm
User’s Manual provided with the enclosure.
Calibration
The TXE comes factory calibrated with the monitor alarm at 60 ± 10 fpm with the
inflow velocity set at 90± 10 fpm.
Programming the Guardian 1000 Digital Alarm
Set the desired face velocity of the enclosure with the doors closed using an
average face velocity of readings from a thermal anemometer.
Configure Alarm
To successfully calibrate the airflow monitor, it will be necessary to change the
face velocity by adjusting the airflow exhaust volume. The exhaust volume can be
adjusted using the speed control located behind the front panel on the TXE.
The following inflow face velocity speeds are recommended to successfully
calibrate. To begin, determine what the low airflow, low warning airflow, normal
airflow, and high airflow shall be.
NOTE: ENTER button stores information
+/- Buttons allow for scrolling.
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Chapter 6: Maintaining Your TXE
30
CALIBRATION CONFIG MENU
SETTINGS
DISPLAY UNITS
FPM
LOW AIR ALARM
SEE CHART ABOVE – LOW AIR ALARM
LOW AIR CUTOFF
OFF
LOW AIR CUTOFF
SEE CHART ABOVE – LOW AIR ALARM
WARNING AIR ALARM
SEE CHART ABOVE – LOW CALIBRATION SET
POINT (Set 3-5 FPM above low air alarm)
WARNING AIR RESET
3 FPM
HIGH AIR ALARM
OFF
HIGH AIR ALARM
OFF
LOWER AIR SAMPLE FLUCTUATIONS
3%
HIGHER AIR SAMPLE FLUCTUATIONS
3%
LOWER/HIGHER AIR SAMPLE
DIFFERENCE
10 FPM
WARN TO ALARM AIR TIME
10 SECONDS
ALARM TO WARN AIR TIME
3 SECONDS
SHOW AIR FLOW
ON
SHOW TIME LINE OFF = DISPLAYS
BAR GRAPH
OFF
AUDIBLE ALARM
ENABLED
SENSOR DIFFERENCE
2%
1. Push the ENTER button on the face of the alarm until the Set up Menu is
displayed.
2. Scroll to SET UP and hit ENTER.
3. The PASSWORD MENU displays (The Password is 0000). Press the
ENTER button repeatedly until the CAL CONFIG MENU is displayed.
4. In the CAL CONFIG MENU set for the following:
5. To complete the CAL CONFIG, be sure to enter “DONE”. You are
returned to the Main Menu.
Calibrate Alarm
1. Scroll to set up and hit ENTER, then CALIBRATE and hit ENTER.
2. The PASSWORD MENU displays (The Password is 0000). Press the
ENTER button repeatedly until the next menu is displayed.
3. Adjust the speed of the fan until the low airflow velocity is reached. Use
your thermal anemometer readings to determine the low air velocity.
4. Enter the value of your low airflow velocity using your +/- scroll keys. Be
sure the front panel is installed. Step out of the way, wait approximately 30
seconds for air currents to settle and hit ENTER. The airflow alarm will
sample the airflow.
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5. Adjust the speed of the fan until the high airflow velocity is reached using
Labconco 1000 Digital
Keypads, LEDS)
Front Panel to be installed
calibration setpoints.
Control Panel
Light Reflector
Speed Control
Adjustment
Airflow Sensor
15 VDC Power Supply,
Supplied from Lab)
This end connected to
Alarm Unit
6. Enter the value of your high airflow velocities. Be sure the front panel is
7. The set up menu is displayed. Select DONE and hit ENTER.
8. The main menu will be displayed. Select RUN and hit ENTER.
You have successfully configured and calibrated your Guardian 1000 Digital
Airflow Monitor.
Alarm Unit (Digital Display,
Labconco 1000 Digital
115V only (230V Power
Chapter 6: Maintaining Your TXE
the readings from the thermal anemometer. Then re-install the front panel,
if so equipped.
installed. Step out of the way, wait approximately 30 seconds for air
currents to settle and hit ENTER. The airflow alarm will sample the
airflow.
for proper calibration. Front
Panel removed to set
speed control and then
reinstalled for low & high
Figure 6-3
Guardian Digital 1000 Airflow Monitor
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Chapter 6: Maintaining Your TXE
32
Initial Certification
The TXE has been certified at the factory for an inflow velocity of 90±10 fpm
along with the HEPA Filter Leak Test. The TXE enclosure should be certified for
the proper inflow velocity required by your Safety Officer. It is also a
conservative recommendation to perform the HEPA Filter Leak Test again should
there be any damage caused during transport.
Re-Certification
Under normal operating conditions, the enclosure should be recertified at least
annually if serviced. The certifier should perform the following tests.
Inflow Velocity Test
HEPA Filter Leak Test
In addition, the following tests should also be performed at the user’s discretion:
Measure of Line Voltage and Current
Smoke Test to determine proper airflow patterns
Lighting Intensity Test (when appropriate)
Noise Level Test (when appropriate)
Vibration Test (when appropriate)
Fluorescent Light Replacement
1. Disconnect the power.
2. Locate the light reflector located under the control panel shown in Figure
6-2 and Figure 6-3.
3. Remove the light reflector support by removing four Phillips screws on the
side of the light reflector.
4. Rotate and remove the old fluorescent lamp.
5. Reinstall the new fluorescent lamp and light reflector in reverse order.
6. Power the unit up and try the new fluorescent lamp.
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Chapter 6: Maintaining Your TXE
33
!
!
Motorized Impeller Replacement
The motorized impeller must be replaced as a complete unit. When the motorized
impeller is replaced, the capacitor may also be replaced. See Appendix A for
Replacement Parts Diagram. See Figure 6-5 for an isometric view of the motorized
impeller plenum assembly. The HEPA filter rests on top of the motorized impeller
assembly.
Do NOT contact blower wheel while still in motion.
NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.
1. Wear appropriate personal protective equipment to decontaminate the filtered
enclosure and then unplug from the electrical outlet.
2. Remove HEPA filter per the HEPA filter removal procedure outlined in this
chapter.
3. Consult the wiring diagram in Appendix C of the manual and disconnect all the
wires of the motorized impeller. Be sure to connect wires on the new motor in
the same way the old motor was wired.
4. Remove four screws in the motor bracket that hold motor bracket to the
supports with the vibration isolation mounts. Remove the motor and bracket.
ATTENTION: High-speed blower. Never operate impeller with
housing off.
5. Replace the capacitor with a new one of equal voltage and capacity.
6. Reassemble the new motorized impeller by reversing the assembly steps.
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Chapter 6: Maintaining Your TXE
34
HEPA Filter Gasket Up
HEPA Filter
Motorized Impeller
Screws to Remove (2 each side)
Vibration Isolator Mount
HEPA Filter Back Stop
Wire Access Hole
Wire Access Hole
Motor Support Bracket
Impeller Metric Screws & Washers
Motorized Impeller Plenum Assembly
Motorized Impeller Replacement
Figure 6-4
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Chapter 6: Maintaining Your TXE
35
!
Speed Control Replacement
Do NOT contact blower wheel while still in motion.
NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.
1. Remove the bracket that the speed control is attached to. See Figures 6-1, 6-2
and 6-3.
2. Remove the two screws holding the speed control using a Phillips screwdriver.
Refer to Appendix A for Replacement Parts Diagram.
3. Disconnect all wires leading to the speed control. Connect wires on new speed
control in the same position as the old speed control.
4. Reassemble to the system in the same position and with the same screws that
were removed earlier.
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36
Part
Description
3924400
2' Canopy Exhaust Connection (6")
CFM @ Static Pressure-Inches of H2O
S.P.
0.0"
0.125"
0.25"
0.50"
0.75"
0.87"
CFM
595
560
515
420
300
167
Catalog
#
Description
Shipping Wt.
(lbs./kg.)
4863500
Remote Blower, 115 V, 60 Hz. 4.4 amps
35/16
4863501
Remote Blower, 115/230 V, 50 Hz, 5.6/2.8 amps
35/16
7053501
Explosion-Proof Remote Blower, 115 V, 60 Hz,
4.4 amps
40/18
Chapter 7:
Accessories
1. Canopy Exhaust Connection for Ducting to Outside
Canopy Exhaust connects to the TXE with integral motorized impellers
from the top so the duct can be routed up and outside the building. The
Canopy Exhaust is available for 6" nominal duct. The Canopy Exhaust
Connection should be sealed to the top of the enclosure with silicone
sealant to prevent leaks. See Figure 3-2.
Order the following:
2. Remote Blowers
Has a 1/4 hp direct drive motor and corrosion-resistant epoxy-coated steel
housing and wheel with blower inlet of 6.00" ID. Outlet dimensions are 4.25"
x 7.38" OD.
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37
Catalog #
Description
3924000
6" Epoxy Coated Steel In-Line adjustable damper
4724200
6" PVC In-line adjustable damper
Width
Catalog #
Size
2'
3707900
18" x 18" x 3.31"
Width
Catalog #
Size
2'
3776003
48" Circum. x 54" lg.
3. Exhaust Dampers
Exhaust dampers allow adjustments required to maintain proper airflow for
roof-mounted blowers or house exhaust systems.
Chapter 7: Accessories
Figure 7-1
4. Accessory Filters
HEPA Filter
HEPA Filter is 99.99% efficient on particles 0.3 micron and 5' and 6' have two
each.
HEPA Filter Bag-In/Bag-Out Bag
The bag helps contain hazardous particulate matter during filter changing
operations.
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PROBLEM
CAUSE
CORRECTIVE ACTION
Contaminants outside of
enclosure.
Improper user techniques
for the enclosure.
See “Certifying the Enclosure” Chapter 3 and
“Safety Precautions” Chapter 4 sections in the
manual. (Ref. Appendix D).
Restriction of the baffle
air slots or blockage of the
exhaust outlet.
Remove obstruction to ensure that all air slots
and the exhaust outlet are unobstructed.
External factors are
disrupting the enclosure
airflow patterns or acting
as a source of
contamination.
See “Location Requirements” Chapter 2,
“Certifying the Enclosure” Chapter 3, and
“Safety Precautions” Chapter 4 sections of this
manual. (Ref. Appendix D).
Enclosure has improper
face velocity.
Have enclosure certified and check exhaust
system. Check HEPA filters for loading.
Adjust enclosure speed control. Enclosure
should have an average face velocity of 60-100
fpm for weighing procedures and 75-105 fpm
for biohazardous procedures.
Blower won’t operate.
Unit not plugged into
outlet.
Plug the enclosure into appropriate electrical
service.
Circuit breaker(s) or
Ground Fault Interrupter.
Reset circuit breaker.
Blower wiring is
disconnected.
Inspect blower wiring.
Blower switch is
defective.
Replace switch.
Motorized impeller or
blower is defective.
Replace motorized impeller or blower. See
Chapter 6.
Low face velocity or poor
containment of
contaminants.
Enclosure sash not closed.
Close sash to the lowest position.
HEPA filter clogged.
Replace HEPA filter or increase speed.
Carbon filter loaded with
chemicals.
Replace carbon filter.
Blower and lights won’t
operate.
Unit not plugged into
outlet.
Plug enclosure into appropriate electrical
service.
Circuit breaker(s) tripped.
Reset or replace circuit breaker.
Chapter 8:
Troubleshooting
Refer to the following table if your TXE fails to operate properly. If the suggested
corrective actions do not solve your problem, contact Labconco for additional
assistance.
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Chapter 8: Troubleshooting
39
PROBLEM
CAUSE
CORRECTIVE ACTION
Lights do not work.
Lamp not installed properly.
Inspect lamp installation.
Lamp wiring disconnected.
Inspect lamp wiring.
Defective lamp.
Replace lamp.
Light switch is defective.
Replace light switch.
Defective electronic ballast.
Replace ballast.
Airflow monitor
malfunction.
No power.
No lights.
No display.
Power cable to circuit board is disconnected
and needs to be connected. Sensor cable needs
to be connected. Power supply is not plugged
into proper voltage; plug in power supply.
Verify that all airflow monitor interface cables
are connected. Check fuses on enclosure.
No audible alarm.
Alarm has been temporarily silenced using
“SILENCE ALARM” or “enter” buttons.
Wrong alarm set point.
Airflow monitor was not properly adjusted.
Repeat calibration steps outlined in this manual
in Chapter 6 or in the supplied Digital 1000
Monitor Manual.
Constant audible alarm.
Check airflow and calibration of airflow
monitor. See Chapter 6.
Continuous alarm.
Check the face velocity of the enclosure as the
airflow of the system may have changed. If
incorrect, adjust the speed control to increase
face velocity. The HEPA filter may have
become loaded. If face velocity is correct,
calibrate the airflow monitor outlined in this
manual in Chapter 6.
Monitor alarms; air way to
airflow monitor sensor is
blocked by insects, dust or
debris.
Lightly clean the airway with clean air. Be
careful not to touch sensitive electrical
components.
Audible disable will not stay
operational.
An alarm condition must be continuously
present before the audible alarm can be
silenced. If flow conditions fluctuate near the
alarm set point, the airflow monitor will
automatically reset it. Action should be taken
to bring the enclosure airflow into proper
operating parameters or adjust the alarm set
point lower.
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Chapter 8: Troubleshooting
40
Customer Name
Model Number
Date Installed
Serial Number
Unit Location
Date
Comments
Service Operating Record Log
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41
Item
Qty.
Part Number
Description
1 1 3890600
Sash Assembly - Upper
2 1 3890500
Sash Assembly - Lower
3 1 3776003
Bag, 2' – for Bag-In/Bag-Out
4 1 3890700
Reflector, Light
5 1 3708300
Lamp, Fluorescent (F15T8-SP35)
6 1 3918500
Wiring Harness Main, 115V
6A 1 3918600
Wiring Harness Main, 230V
7 1 3811500
Guardian Airflow Monitor Printed Circuit Board
8 1 3910700
Airflow Switch
9 2 1307000
Switch, Rocker (2 position)
10 3904800
Front Panel
10A 1 3904803
Front Panel with Digital Monitor Cutout
11 1 3916500
Impeller, Motorized 115V
11A 1 3916501
Impeller, Motorized 230V
12 1 1306900
Capacitor 115V 10 MFD
12A 2 1306800
Capacitor 230V 4 MFD (effective 2MFD)
13 1 1295510
Ballast, Fluorescent
14 1 1325500
Speed Control, 115V
14A 1 1325501
Speed Control, 230V
15 1 3707900
HEPA Filter 18 x 18 x 3.32 w/ Gasket
16 1 7907802
Digital Monitor Outlet, 115V
16A 1 3915100
Digital Monitor Outlet, 230V
17 1 1333800
IEC Power Inlet 115V
17A 1 1339200
Receptacle RFI Filter 230V
18 1 1305800
Power Cord, 115V, Right Angle
18A 1 1334200
Power Cord, 230V, Right Angle
19 1 1327200
Circuit Breaker, 3 AMP – 115V
19A
2
1327205
Circuit Breaker, 2 AMP – 230V
20 1 3908500
Digital Airflow Monitor, 115V – 15 VDC Adapter
20A 1 3908501
Digital Airflow Monitor, 230V – 15 VDC Adapter
21 1 3919800
Exhaust Duct, 6" ( NOT SHOWN )
22 1 1952500
Gauge, Pressure Mini Helic II
23 1 3925600
Harness, Relay (for Remote Blower on XPert Filtered Station)
Appendix A:
Replacement Parts
The components that are available for your TXE are listed. The parts shown are
the most commonly requested. If other parts are required, please contact Product
Service.
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Appendix A: Replacement Parts
42
6, 6A, 17, 17A,
18, 18A, 19, 19A
12, 12A
14, 14A
11, 11A
8
16, 16A
13
10A
20, 20A
10
22
5
4 1 7
9
2
23
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43
Appendix B:
Dimensions
See the following dimensions and exhaust options for the TXE.
Figure B-1
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Appendix C:
Specifications
This Appendix contains technical information about the XPert TXE including
electrical specifications and environmental operating conditions.
Electrical Specifications
3 Amps, 115V, 60 Hz
2 Amps, 230V, 50Hz
Environmental Conditions
Indoor use only.
Maximum altitude: 6562 feet (2000 meters).
Ambient temperature range: 41° to 104°F (5° to 40°C).
Maximum relative humidity: 80% for temperatures up to 88°F (31°C),
decreasing linearly to 50% relative humidity at 104°F (40°C).
Main supply voltage fluctuations not to exceed ±10% of the nominal
voltage.
Transient over-voltages according to Installation Categories II (Over-
voltage Categories per IEC 1010). Temporary voltage spikes on the AC
input line that may be as high as 1500V for 115V models and 2500V for
230V models are allowed.
Used in an environment of Pollution degrees 2 (i.e., where normally only
non-conductive atmospheres are present). Occasionally, however, a
temporary conductivity caused by condensation must be expected, in
accordance with IEC 664.
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