Rapid Digestor Fume Removal System
Model 23500-20 – Designed for 20 Place Block Digestors
Model 23500-25 – Designed for Rapid Digestor 25 Place
Model 23540 – Designed for Rapid Digestor 4 Place
INSTRUCTION MANUAL
Product designs are subject to change without notice
© 1999, 2007, 2013 Labconco Corporation
2350500 – Rev. G / ECO H435
Printed in U.S.A.
TABLE OF CONTENTS
Preface ..........................................................................................................................................................4
Introduction
General Description .................................................................................................................................5
Detailed Operation Function...................................................................................................... 5
Exhaust Manifold................................................................................................................................ 5
Water Jet Eductor.................................................................................................................. 5
Stand and Drip Pan ............................................................................................................... 5
Specifications............................................................................................................................. 6
Installation................................................................................................................................................... 7
Normal Operation.......................................................................................................................................8
Routine Maintenance..................................................................................................................................9
Replacement Parts ....................................................................................................................................10
Water Eductor Assembly .........................................................................................................................11
Water Eductor Installation Methods ......................................................................................................12
Model No. 23500-20 ..................................................................................................................................13
Model No. 23500-25 ..................................................................................................................................14
Fume Removal R/D-4 ............................................................................................................................... 15
Warranty ...................................................................................................................................................16
Shipping Claims ........................................................................................................................................17
Contacting Labconco ................................................................................................................................18
PREFACE
Thank you for displaying confidence in us by selecting a Labconco Rapid Digestor Fume
Removal System. Our design engineers, assemblers and inspectors have utilized their skills and
years of experience to ensure that the new Labconco Rapid Digestor Fume Removal system
meets our high standards of quality and performance.
IMPORTANT NOTICE
This manual should be read carefully by all the end users in order to become familiar
with the operation of the Labconco Rapid Digestor Fume Removal System. Recommendations
are made within the manual to help you obtain maximum performance and life from your
products.
We have included sections on initial set up, operations, maintenance and troubleshooting
to provide you with all the tools necessary to achieve maximum performance.
If you have questions or concerns, do not hesitate to call us at 1-800-821-5525 for
assistance.
4
INTRODUCTION
General Description
The Labconco Fume Removal Systems are designed to remove corrosive fumes produced
when performing Kjeldahl digestions utilizing either the Labconco’s Rapid Digestors or
Block Digestors having a 20 digestion tube configuration. Models 23500-25 and 23540 are
used with Labconco’s Rapid Digestors, whereas, Model 23500-20 is used with the 20 place
block digestor systems. Fumes from a digestion are removed from the digestion tubes
through the exhaust manifold by a water jet eductor, which empties into a convenient drain.
Detailed Operation Function
The Labconco fume Removal System consists of the exhaust manifold, water jet
eductor, stand for exhaust manifold, and drip pan. Model 23540 fume removal system for
the 4-place digestor does not include jet eductor, stand, or drip pan.
Exhaust Manifold
The manifold consists of the glass removal system contained in aluminum, stainless
steel on the 4-place system housing. All aluminum parts are finished by a chemically etched
process to withstand corrosion. The glass manifold has either four, twenty, or twenty-five
bulbs, depending on model number that fit directly into the digestor tubes providing fume
removal. The glass manifold pipes are interchangeable and can be replaced in case of
breakage. High temperature acid resistant hose is provided for the connection from the glass
manifold to the water jet eductor.
Water Jet Eductor – Not applicable to Model #23540
The Water Jet Eductor is made of an acid resistant material to assure long life and
trouble free operation. The movement of water through the eductor creates a vacuum that
exhausts the fumes collected by the exhaust manifold. The amount of water flow required is
usually in the range of 2-3 gallons/minute. The amount of vacuum required from the water
eductor is controlled by the adjustment of the water flow rate.
Stand and Drip Pan – Not applicable to Model #23540
The stand is designed to hold the exhaust manifold when not in use. The drip pan is
placed under the stand to catch any acid drippings. Each is finished with an acid resistant
coating to assure long life and good appearance.
5
INTRODUCTION
Specifications
1. Water Requirements
Supply tap water
Demand 2-3 gallons/minute
Connections for eductor 1/2" male (A1/2" x 3/8" nipple is provided
for connection to a regular laboratory
gooseneck faucet.
2. Physical Specifications
Weight (exhaust manifold 5.7 lbs. Model #23500-20 (20 place system)
Including water jet eductor). 7.1 lbs. Model #23500-25 (25 place system)
4 lbs. Model #23540 (4 place system without
Water Jet Eductor).
3. Drain
Drain must be capable of handling 2-3 gallons/minute water flow. Eductor water
outlet must enter into a sink or a laboratory drain and it is recommended that the
eductor drain be located in a fume hood. If location in fume hood is not possible,
refer to layout drawings located on page 8. Water Jet Eductor not included with
Model #23540.
6
INSTALLATION
Installation
Unpacking
Use caution when unpacking the digestor and accessories to avoid damage. The exhaust
housing and manifold are shipped in the same carton. Remove items from the carton and inspect
for any damage. Inspect all packing material to insure that no accessories or small parts are
discarded by accident. If damage from shipping has occurred, the customer must file a claim
with the carrier IMMEDIATELY! Do not return any item to Labconco Corporation without
written authorization from the factory. Your local laboratory apparatus dealer can assist you and
should be contacted if problems occur.
Installation and Assembly (refer to detail drawings located on page 7, 8, 9, 10, and 11)
Install eductor by one of the methods described in the detailed drawing. The eductor
assembly as provided is for connection to a regular laboratory gooseneck faucet – (method 1).
Model #23540, fume removal system for Rapid Digestor 4 place, is not provided with the Water
Jet Eductor. Any non-metallic water aspirator pump such as Nalgene® 6140 or equivalent is
suitable for use with the 4-place fume removal system. It is recommended that eductor and drain
be located in a fume hood to remove the small amount of gases that do not dissolve in the water
stream. It is also recommended that the digestor and fume removal system be located in a fume
hood to prevent accumulation of fumes in the laboratory during observation and dilution of the
digested samples. Assemble glass manifold sections as shown in detailed drawing. Model
#23540 comes completely assembled. Align manifold pipes into manifold by placing glass
manifold assembly on flat surface. Adjust each manifold pipe section to assure a snug fit into the
ground glass taper joint. Place stainless steel retainer clip around glass taper joints as shown in
detail drawing. Insert assembled glass manifold into manifold housing. Attach rear brackets into
place with screws that are provided. Glass manifold should be free to move slightly in housing
to prevent any stresses. Refer to detailed drawing located on 9, 10, and 11.
Connect manifold assembly to the water aspirator with the high temperature acid resistant
hose provided. Expansion of the acid resistant hose may be necessary to facilitate installation of
the hose to the glass manifold hose connection. The exhaust system is now ready for operation.
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OPERATION
Operation
Place exhaust manifold on top of digestion tubes immediately after placing tubes in
digestor. Refer to Digestor instruction manual for operation of digestor. Alignment is
accomplished by a side to side, front to back motion. It is not necessary to have a full rack of
tubes in place, but there must be a tube in each corner and the center of the digestor for support
of the exhaust manifold. Adjust water flow to eductor to maximum and allow water flow to be at
a maximum until the large amount of fumes produced during first stages of digestion have
subsided. (Usually 5-7 minutes, depending on moisture content and size of sample). Reduce
water flow to the point where all fumes are removed.
CAUTION: If maximum water flow to the eductor is allowed to continue throughout
entire digestion, the removal of too much acid could take place, resulting in caking of sample
contents contained in the digestion tubes and/or nitrogen loss. Remove only those fumes that
have been expelled to the top of the digestion tubes. At the end of the digestion period, remove
digestion tubes from digestor for cooling. Leave exhaust manifold in place on top of the tubes
during removal and cooling period.
Tile exhaust manifold to the rear to allow drainage of acid from the manifold to the
eductor after cooling period. Place exhaust manifold on stand allowing drip pan to collect all
acid expelled from the manifold. Drip pan is to be placed directly under stand to catch acid
drainage from manifold. This drainage can be held to a minimum if exhaust manifold is tilted to
the rear to allow drainage of acid into the eductor. Stand and drip pan is not provided with
Model #23540.
8
MAINTENANCE
Maintenance
Periodic cleaning of the exhaust manifold is necessary for efficient operation of the system. The
glass manifold can be disassembled and washed with detergent and water solution when cool.
The manifold can also be washed by immersion and rinsing each bulb with water. Adjust
eductor to maximum water flow to drain water wash from manifold. Inspect each bulb contained
on the manifold pipes for obstructed vent hole. If obstructed, remove foreign material before
reassemble. Rinse drip pan with water after each use.
Service (Model #23500-20 and 23500-25 only)
Replacement of glass manifold
1. Remove four screws from rear side of manifold housing.
2. Remove the two rear manifold brackets that retain the old manifold. Remove
old manifold by slipping manifold glass pipes from front bracket.
3. Assemble glass manifold as in installation and assembly page 3.
4. Install new glass manifold in housing and reassemble in reverse order.
Replacement of Glass Manifold Sections
1. Follow steps 1 and 2 under “Replacement of Glass Manifold” above.
2. Remove retaining clip from section of manifold that requires replacement.
3. Replacement manifold section and reassemble in reverse order.
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REPLACEMENT PARTS
Part Number Description
13575 Water Jet Eductor
16223 2' Drain Hose, Rubber
23526 Manifold Complete – 20 Place
23515 Glass Pipe – 20 Place
23516 Rear, Glass Manifold – 20 Place
23513 Manifold Complete – 25 Place
23532 Glass Pipe – 25 Place
23533 Rear, Glass Manifold – 25 Place
15400 Tubing High Temperature – Acid Resistant (per ft)
23517 Stainless Steel Clip
Model #23540
Part Number Description
16226 Tubing, high temperature and acid resistant
23085 Glass Pipe
REPLACEMENT PARTS LIST
Models 23500-20 and 23500-25
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DRAWINGS
Figure 1
11
DRAWINGS
Figure 2
12
DRAWINGS
MODEL NO. 23500-20
(For 20 Place digestion Systems)
Figure 3
13
DRAWINGS
Figure 4
14
DRAWINGS
Figure 5
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WARRANTY
We are committed to providing our customers with quality equipment and service after
the sale. Part of this objective involves keeping you informed of changes and new product
additions. We therefore request that you take a moment to fill out the product registration
card so we may know your location as well as some of the reasons that prompted you to
purchase our products.
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.
The warranty for all Labconco products will expire one year from date of installation or
two years from date of shipment from Labconco, whichever is sooner, except the following:
• Purifier® Logic® Series Biological Safety Cabinets and PuriCare® Lab Animal
Research Stations carry a three-year warranty from date of installation or four years
from date of shipment from Labconco, whichever is sooner.
• SteamScrubber® & FlaskScrubber® Glassware Washers carry a two-year warranty
from date of installation or three years from date of shipment from Labconco,
whichever is sooner.
• Blood Drawing Chairs carry a ten year warranty.
• Carts carry a lifetime warranty.
• Glassware is not warranted from breakage when dropped or mishandled.
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.
WARNING: 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 urged 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.
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SHIPPING CLAIM
If a shipment is received in visibly damaged condition, be certain to make a notation on
the delivering carrier’s receipt and have his agent confirm the damage on your receipt.
Otherwise, the damage claim may be refused.
If concealed damage or pilferage is discovered, notify the carrier immediately and retain
the entire shipment intact for inspection. Interstate Commerce Commission rules requires that
the claim be filed with the carrier within 15 days after delivery.
NOTE: Do not return goods. Goods returned without prior authorization will not be
accepted. Labconco Corporation and its dealers are not responsible for shipping damage. Claims must be filed directly with the freight carrier by the recipient. If
authorization has been received to return this product, by accepting this approval, the
user assumes all responsibility and liability for biological and chemical
decontamination and cleansing. Labconco reserves the right to refuse delivery of any
products, which do not appear to have been properly cleaned and/or decontaminated
prior to return.
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CONTACTING LABCONCO
If you have any questions that are not addressed in this manual, or if you need technical
assistance, please contact Labconco Sales Information Department at 800-821-5525, and Service
Information at 800-522-7658 or 816-333-8811, between the hours of 7:00 a.m., and 6:00 p.m.,
Central Standard Time.
You can visit Labconco through the Internet at:
http://www.labconco.com
or
email: labconco@labconco.com
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