Welch Allyn Medical Diagnostic Equipment 2511 Users Manual 67 1772R1.1

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OWNER’S MANUAL

FOR

ASPIRATION / FILTRATION

VACUUM SYSTEM

MODELS:

2511 & 2515

Welch Rietschle Thomas

7301 North Central Avenue

Skokie, IL 60077

Phone: (847) 676-8800

Fax: (847) 677-8606 (Technical Support)

Fax: (920) 451-4397 (Ordering)

E-Mail: welchvacuum@thomasind.com Part No. 67-1772R1.1

Web-Page: www.welchvacuum.com Printed in USA

For outside of U.S. and Canada, contact your local

Rietschle Thomas sales office, see back page

Approval Agency’s

Warning

Not recommended for pumping acid,

base or organic vapors or gases.

Model 2515B-75Model 2511B-75 / 2511C-75 Model 2515C-75

INSTRUCTION

WARNING AND CAUTION

PLEASE READ BEFORE OPERATION

While reading your manual, please pay close attention to areas labeled:

WARNING AND CAUTION.

The description of each is found below.

WARNING

Warnings are given where failure to observe instruction could result

in injury or death to people.

CAUTION

Cautions are found where failure to observe the instruction could result

in damage to the equipment, associated equipment and process.

These units confirm to the SI International system of units of measurement.

The following symbols (with recommendation of IEC1010 ) of warning will be found on the pump.

Caution - refer to accompanying documents

Caution - risk of electrical shock

Caution - hot surface

Double Insulated

OFF (Power)

ON (Power)

WARNING

Motor includes a self resetting thermal cutout and the pump could

restart without actuation under fault condition.

2

TABLE OF CONTENTS

Section 01 - SAFETY INFORMATION

1.10 Caution To Prevent Injury

1.20 Caution To Reduce Risk Of Electrical Shock

1.30 Warning To Reduce Risk Of Electrocution

1.40 Danger To Reduce Risk Of Explosion Or Fire

Section 02 - INSTALLATION

2.10 Introduction

2.20 Unpacking

2.30 Pump Mounting

2.40 Pump Location

2.50 Intake And Discharge Provision

2.60 Electrical Power

2.70 Vacuum Connection

2.80 Vacuum Gauges

2.90 Traps

Section 03 - OPERATION

3.10 Starting Procedures

3.20 Leak Detection

3.30 Operating Pressure Range

3.40 Shutdown Procedures

Section 04 - MAINTENANCE

4.10 Maintenance Procedures

Section 05 - TROUBLESHOOTING

5.10 Vacuum Problems

5.20 Pressure Problems

5.30 Trouble Shooting Guide For 2515

5.40 Trouble Shooting Guide For 2511 And 2515

Section 06 - SPECIFICATION

6.10 Specification Table

Section 07 - WARRANTY

Section 08 - EXPLODED VIEWS AND PARTS LIST

8.10 Exploded View And Parts List For 2511B-75 / 2511C-75 / 2511C-76

8.11 Exploded View And Parts List For 2515B-75 / 2515C-75 / 2515C-76

8.12 Exploded View And Parts List For 1475K-20

Section 09 - KITS AND ACCESSORIES

3

SECTION 1: SAFETY INFORMATION

1.10 Caution: To Prevent Injury...

1.11 Never operate this product if it has a damaged cord or plug. If it is not working properly, has been

dropped, damaged or has fallen into water, please return the product to a Welch service center for

examination and repair.

1.12 Keep the cord away from heated surfaces. All electrical products generate heat. To avoid serious burns

never touch unit during or immediately after operation.

1.13 Never block any air openings or place it on a soft surface where the openings may be blocked.

The air openings are for ventilation of the motor inside the housing. Keep all air openings free of lint,

dirt and other foreign objects.

1.14 Models 2511 and 2515 are thermally protected and can automatically restart when the protector resets.

Always disconnect power source before servicing.

1.15 Never drop or insert fingers or any other object into any openings.

1.16 Do not operate this product where oxygen is being administered.

1.17 Wear safety glasses and goggles when operating this product. Never point any air nozzle or air sprayer

toward another person or any part of the body.

1.18 Use only in well ventilated areas.

1.19 Do not use any tools or attachments without first determining maximum air pressure for that tool

or attachment (applies to model 2511 only). Be sure to properly identify intake and discharge

before using pump. See Section 2.50.

WARNING

Do not fill the collection jar above the safe fill level line

indicated on the jar.

1.20 Caution: To Reduce Risk Of Electrical Shock...

1.21 Do not disassemble. Disassembly or attempted repairs if accomplished incorrectly can create electrical

shock hazard. Refer servicing to qualified service agencies only.

1.22 115V unit is supplied with a three pronged plug.

Be sure to connect pump to a properly grounded outlet only.

1.30 Warning: To Reduce Risk Of Electrocution...

1.31 Do not use this product in or near area where it can fall or be pulled into water or other liquids.

1.32 Do not reach for this product if it has fallen into liquid. Unplug immediately.

1.33 Never operate this product outdoors in the rain or in a wet area.

1.40 Danger: To Reduce Risk Of Explosion or Fire...

1.41 Do not use this pump in or near explosive atmospheres or where aerosol (spray) products are being used.

1.42 Do not pump anything other than atmospheric air.

1.43 Do not pump combustible liquids or vapors with this product or use in or near an area where flammable

or explosive liquids or vapors may exist.

1.44 Do not use this product near flames.

WARNING

Failure to observe the above safety precautions could result

in severe bodily injury, including death in extreme cases.

4

SECTION 2: INSTALLATION

2.10 Introduction

2.11 This manual has been compiled not only for the care and maintenance of the Welch Aspiration/Filtration

Vacuum System now in your possession, but as a helpful reference and guide to prevent many problems

which may occur if used improperly.

2.20 Unpacking

2.21 Carefully remove the Aspiration/Filtration Vacuum System from the shipping case. Preserve all

paperwork for future reference. If damage has occurred from shipment a claim must be filed with the

carrier immediately; preserve the shipping carton for inspection by the carrier. If you are required to

communicate with your dealer or Welch Vacuum, be sure to include your order numbers for quick

identification. Do not return the pump to the factory without first calling for a returned goods number.

2.30 Pump Mounting

2.31 Rubber feet are attached to the pump. Rubber feet are excellent for applications involving a

semi-flexible surface such as a bench top; they help to isolate noise and eliminate creeping.

All Aspiration/Filtration Vacuum Systems should be mounted on a horizontal plane.

2.40 Pump Location

2.41 The Aspiration/Filtration Vacuum System should be located preferably in a clean, dry, and well

ventilated area. Please be sure not to block the ventilation holes located on the motor housing. The

system should be placed where the surrounding temperature remains between 10°C and 40°C

(50°F and 104°F). Always check to insure the location chosen is protected from direct or indirect

moisture contact. Welch recommends that the pump be installed at the highest point within the system

to prevent possible water condensate from entering the pump. The pump should be located as closely to

its system in order to utilize it most efficiently.

WARNING

The motor is thermally protected and will automatically restart unexpectedly

when the overload device resets. Don’t pump flammable or explosive gases or

vapors or operate this pump in an atmosphere containing flammable or

explosive gases or vapors.

5

2.50 Intake And Discharge Provision

2.51 The vacuum regulator and vacuum dial gauge is attached to the collection jar. The vacuum regulator

allows the vacuum level to be set between roughly atmospheric pressure and the maximum vacuum

allowed for the pump model. The collection jar and hydrophobic filter keeps water from accidentally

being drawn into the unit. The regulator allows discharge pressure to be set between atmospheric and

the maximum possible for the pump model. Model 2511 is equipped with a pressure port.

Note: Adjusting the vacuum regulators will affect the performance of the pump.

WARNING

Never block the discharge port. If the exhaust is blocked, pressure will build-up

in the pump above its rated operating pressure.

Be sure to call Welch technical service prior to start up at 847-676-8800 if you have any questions.

IntakePressure / Exhaust

Model 2511B-75 & 2511C-75

Discharge / ExhaustIntake

Model 2515B-75

Vacuum GaugeVacuum Regulator

Vacuum Regulator Vacuum Gauge

6

Model 2515C-75

Intake

Vacuum Regulator

Discharge / Exhaust

Vacuum Gauge

2.60 Electrical Power

2.61 Power Source Review

Review the power source and the motor rating to be sure they agree in voltage, phase, and frequency.

Serious damage may occur to the motor if it is connected to an improper voltage. All Welch pumps must

be grounded. Grounding reduces the risk of electric shock in the event of an electrical short circuit.

The plug must be plugged into a properly grounded outlet. Consult your local electrical codes if you

have doubts.

2.62 Overload Protection (Model 2515)

Motor thermal overload protection is made available by the motor manufacturer as an aid to minimize

motor failure. Overload protection is a standard feature on both 50 and 60 Hz single-phase-motors.

The motors have automatic overload protection. Automatic reset protection is designed to reset itself

after a predetermined cooling period. If the fault to the drive remains unaltered, the motor will cycle on

and off until the fault is corrected.

2.63 Servicing of Double-Insulated Product (Model 2511)

In a double-insulated product, two systems of insulation are provided instead of grounding.

No grounding means is provided on a double-insulated product, nor should a means for grounding

to be added to the product. Servicing of a double-insulated product requires extreme care and knowledge

of the system and should be done only by qualified service personnel. Replacement parts for the

double-insulated product must be identical to those parts in the product.

2.64 Classification And Symbol Glossary

2.70 Vacuum Connection

2.71 For best results, Welch recommends the length of the tubing between the pump and the chamber be

kept as small as possible.

2.80 Vacuum Gauges

2.81 All Aspiration/Filtration Vacuum Systems come with dial vacuum gauges. The vacuum gauge gives

negative pressure - That is pressure below atmospheric. The reference point for the gauge is

atmospheric pressure.

2.90 Traps

2.91 The need for a Trap

The pumps will handle humid air. All wetted aluminum parts are treated for corrosion protection from

moisture. All other wetted parts are stainless steel. A plastic trap with a float valve is attached to the

regulator assembly to prevent water condensate from accidentally being ingested into the pump.

See figure below.

WARNING

The pump is not recommended for pumping acid, base or organic vapors

or gases. Serious damage to the pump will shorten the pump’s service life.

In addition, pumping flammable vapors or gases can lead to serious safety

hazard leading to fire or explosion.

Filtration Manifold

Model 2515

7

SECTION 3: OPERATION

3.10 Starting Procedures

3.11 Starting aWelch Aspiration/Filtration Vacuum System

Before attaching the pump to a system, familiarize yourself with the function and action of the

Aspiration/Filtration Vacuum System that you have acquired. Review the power requirements as

described in Section 2.60. Welch recommends running the pump for a few minutes to warm it up, before

use. The warm-up improves the pumps ability to handle humid air. Set the device on a level, sturdy

surface so the controls can be easily reached and adjusted. Connect one end of the application tubing

to the lid vacuum port.

Note: The in-line hydrophobic filter is designed to prevent foreign material from being

drawn into the device. Pump performance may decrease if the hydrophobic filter gets wet or

build up of forgein materialsor Medfilter occurs. It may be necessary to periodically change

the hydrophobic filter

CAUTION

Do not move this device with a full collection jar.

1. Be sure that the power switch is in the OFF (down) position. Plug in the device and turn the

switch to the ON (up) position.

2. Block the application tube leading from the collection jar and allow the gauge to reach stable

vacuum level.

3. Set vacuum level by turning the regulator knob counter-clockwise to increase vacuum or

clockwise to decrease vacuum..

Note: This procedure should be performed each time you use this device.

3.12 Cleaning The Device

1. Make sure the ON/OFF switch is in the OFF (down) position.

2. Unplug the device from the wall outlet and allow suction level to drop.

3. Remove the application tube from the lid vacuum port. Tubing should be cleaned after every use.

Run hot water through it. Soak in a solution of one part of vinegar to three parts hot water

for 20 minutes. Rinse with hot tap water and air dry.

4. Remove the pump tubing from the top of the jar lid.

5. Remove the jar from the holder and place on a firm, flat surface. Release the tabs and lift the lid

from the jar.

6. Wash the jar, gasket, lid and tube in a hot water/dishwashing detergeant solution and rinse with

hot tap water. Soak in a solution of one part of vinegar to three parts hot water for 20 minutes.

Rinse with hot tap water and air dry.

7. Wipe the outside of the case with a clean, damp cloth after each use.

3.20 Leak Detection

3.21 The importance of eliminating all leaks in a vacuum system is obvious. The pump must remove this

added volume of leaked gas to maintain the desired vacuum. Leaks for these pumps can be located by

slightly pressuring the system and painting the suspected area with a thick soap solution. Escaping air

will produce soap bubbles.

8

3.30 Operating Pressure Range

3.31 Aspiration/Filtration Vacuum Systems are designed to be run from slightly below atmospheric to their

maximum vacuum level on the intake side. The pumps also may be run from atmospheric to their

maximum rated pressure rating (Model 2511 only). Consult the Specification Table for the ratings of

your specific model (See Section 6, Specifications).

3.40 Shutdown Procedures

3.41 After use, Welch recommends the pump be run for about 2 minutes disconnected from the vacuum

process. The air pumped through the mechanism will purge out water vapor or droplets of water

condensate that may have formed on the inside of the pump. This purge of the pump mechanism helps

prevent corrosion.

SECTION 4: MAINTENANCE

4.10 Maintenance Procedures

4.11 Maintaining a Welch Aspiration/Filtration Vacuum System

These units are 100% oil-free. The pump employs a non-lube piston and cylinder. No maintenance is

necessary for the bearings. All bearings are sealed and permanently lubricated. Lubrication should not

be attempted. The units are built for continuous duty operation with the quietness and durability of a

diaphragm, but with piston performance.

4.12 Hydrophobic Filter Replacement

Change the filter whenever foreign material is drawn into it or if you notice a reduction in vacuum level.

1. Disconnect the long tube from the fitting on top of the jar lid.

2. Gently pull the hydrophobic filter off of the short tube, that is connected to the

regulator inlet port, and then remove the long tube from the hydrophobic filter .

3. With the green dot facing down, push the new hydrophobic filter into the short tube,

that is connected to the regulator inlet port, then push the long tube.

4. Connect the long tube to the green dot facing barb, and then connect to the fitting

on top of the jar lid.

9

SECTION 5: TROUBLESHOOTING

5.10 VACUUM PROBLEMS

5.11 Leakage, contamination, and unusual outgassing are the general causes of problems associated with

poor vacuum. To operate at maximum efficiency, a system must be thoroughly clean. If the system

is completely clean and free from leaks and unwarranted vacuum problems still exist, the pump should

be checked. A simple criterion for the condition of the pump is the determination of its maximum

vacuum capability. This can be accomplished by blocking of the intake and reading the vacuum level on

the gauge (See Section 2.80).

5.20 PRESSURE PROBLEMS

5.21 Leakage and contamination are the general causes of problems associated with poor pressure.

To operate at maximum efficiency a system must be thoroughly clean. If the system is completely

clean and free from leaks and unwarranted pressure problems still exist, the pump/compressor should be

checked by a service technician.

5.30 TROUBLE SHOOTING GUIDE FOR 2515

Trouble Shooting Guide continous on next page.

10

Poor Poor Loud

Pumping

V

acuum Unit Possible Cause Corrective Action

S

pee

d

X X X Damaged Valves Replace flapper Valves

X X X Debris in Valves Remove debris and check

for valve damage

X X X Damaged Gasket Replace Gasket

X X X Loose Head Screw Tighten Head Screw

X X X Loose Fitting Tighten Fitting

5.40 TROUBLE SHOOTING GUIDE FOR 2511 / 2515

11

Symptoms Possible Cause Remedies

Reduced/low 1. Clogged hydrophobic 1. Replace the filter

vacuum filter. following directions in

this manual. (Section 4.12)

2. Regulator improperly 2. Set regulator vacuum

set. level following operating

instructions.

3. Air leak. 3. Check the tubing and

connectors for possible leaks.

Attach, tighten or replace.

4. Jar lid gasket not 4. Be sure the jar lid and

secured to jar. gasket fit tightly on the jar.

Device does 1. Power cord not 1. Plug in the power cord.

not start plugged in.

2. Defective switch. 2. Contact your service

center or distributor. (See back page)

3. Vacuum still exists 3. Disconnect tubing from the

in system. collection jar to

release vacuum.

Reconnect tubing and

turn on the device.

Gauge reads 1. Faulty gauge. 1. Contact your service

incorrectl

y

center for repair (410) 712-4100.

Device runs but 1. Gauge tubing not 1. Check the tubing and

gauge reads connected or is connectors for possible leaks.

zero leaking. Attach, tighten or replace.

Device stops 1. Device overheated. 1. Unplug device and allow to

running during cool for 10 minutes. Plug in

use and restart.

2. Blown fuse or circuit 2. Replace fuse or reset

breaker in household breaker.

circuit.

3. Low voltage to device. 3. Too many motor operated

appliances on same circuit.

SECTION 6: SPECIFICATION

6.10 SPECIFICATION TABLE

Cat. No. 2511B-75 2511C-75 2511C-76 2515B-75 2515C-75 2515C-76

Free Air Displacement CFM (L/min) 0.39(11) 0.32(9.2) 0.39(11) 1.2(34) 1.0(28) 1.2(34)

Maximum Vacuum in. Hg

Ultimate Vacuum Torr (mbar)

Dimensions L x W x H in. (cm)

Shipping Weight, lbs

Electrical Requirements 115V, 60

Hz

230V,

50Hz

100V,

50/60Hz

115V, 60

Hz

230V,

50Hz

100V,

50/60Hz

6.4 19

27.2

219(292) 70(93)

11.0 x 8.3 x 10.0 ( 28 x 21 x 25.5) 14.8 x 8.3 x 10.0 (37.5 x 21 x 25.5)

21.3

Model 2511 Model 2515

12

SECTION 7: WARRANTY

Warranty Information

Model No.

Serial No.

Date Purchased

Name

Company

Address

Zip

City State Code

Phone No.

Purchased From

Application

For any additional information/literature

needed, please check below:

❑ Laboratory Catalog❑ Industrial Catalog

Belt Drive Belt Drive

Direct Drive Direct Drive

Dry Pumps Dry Pumps

Accessories Accessories

Other

IMPORTANT

Please Read Carefully Before Operating

This Welch®Vacuum Pump

UNPACKING

Inspect the pump carefully. If any damage has occurred, file claim with the carrier immediately. Save the

shipping container for carrier to inspect.

OPERATING PUMP

Refer to the enclosed Instruction/Operation Manual for all information to properly operate and maintain the pump.

WARRANTY

This Welch Vacuum product is warranted to be free from defects in material and workmanship. The liability

of Welch Rietschle Thomas under this warranty is limited to servicing, adjusting, repairing or replacing any

unit or component part which in the judgment of Welch Rietschle Thomas has not been misused, abused or

altered in any way causing impaired performance or rendering it inoperative. No other warranties are

expressed or implied. The method of executing this warranty: servicing, adjusting, repairing or replacing shall

be at the discretion of Welch Rietschle Thomas. Vacuum pumps that have been used for any period, however

short, will be repaired under this warranty rather than replaced.

The warranty is effective for one year from the date of original purchase when:

1. The warranty card has been completed and returned.

2. The product is returned to the factory or other designated service centers, freight prepaid.

3. The product in our judgment is defective through no action or fault of the user.

If the product has become defective through misuse, abuse, or alteration, repairs will be billed regardless of

the age of the product. In this event, an estimate of the repair costs will be submitted and authorization of

these charges will be required before the product is repaired and returned.

To reduce additional charges and delays either within or outside of the warranty period, contact Welch

Rietschle Thomas @ (410) 712-4100 for a return authorization number. Products without a return authoriza-

tion number will be refused by our receiving department. Before shipping, properly pack the pump, insure it

against loss or damage, and on the outside of the pump packaging and the packing slip write in the return

authorization number. Pumps damaged due to improper packaging are the customer’s responsibility.

67-1577

13

SECTION 8: EXPLODED VIEW & PARTS LIST

8.10 Model 2511B-75 / 2511C-75 / 2511C-76

PUMPON/OFF SWITCH

REGULATOR

KNOB

VACUUM GAUGE SHORT

TUBING

LONG

TUBING

APPLICATION

TUBING

HYDROPHOBIC

FILTER

PRESSURE PORT COLLECTION

JAR

14

8.11 Model 2515B-75 / 2515C-75 / 2515C-76

COLLECTION

JAR

LONG

TUBING

APPLICATION

TUBING

HYDROPHOBIC

FILTER

PUMP ON/OFF SWITCH

REGULATOR

KNOB

VACUUM GAUGESHORT

TUBING

15

8.12 Model 1475K-20

COLLECTION

JAR

LONG

TUBING

APPLICATION

TUBING

HYDROPHOBIC

FILTER

SHORT

TUBING

16

SECTION 9: KITS AND ACCESSORIES

9.10 REPAIR KITS

9.11 Repair Kit for Model 2515

Service Seal Gasket

Description Kit Kit

2515K-01 2515K-02

Connecting Rod Assembly #1 1 -

Handle Screw #2 2 -

Head Screw #3 4 -

Head O-Ring #4 1 1

Valve Plate Assembly #5 1 -

Cylinder O-Ring #6 1 1

17

9.20 VACUUM ACCESSORIES

9.21 Table for Vacuum Accessories

Description Welch Kit

Adapter S.S. 40mm

1475K-01

8-Channel Adapter S.S. 40mm

1475K-02

1-Channel Adapter for dispoable tips, w/o ejector

1475K-03

Rubber Adapter for Pasteur pipettes

1475K-04

8-Channel Adapter for dispoable tips, w/ejector

1475K-05

Adapter S.S. 150mm

1475K-06

4-Channel Adapter S.S. 40mm

1475K-07

Adapter S.S. 280mm

1475K-08

1-Channel Adapter for dispoable tips, w/ejector

1475K-09

Vacuboy Hand Operator w/ 1-Channel Adapter S.S.

1475K-10

18

9.30 ELECTRICAL ACCESSORIES

9.31 Table for Electrical Accessories

9.40 REPLACEMENT ACCESSORIES

9.41 Table for Replacement Accessories

Description Welch Kit

115V 60Hz - Maintained on/off footswitch

1430A

115V 60Hz - Variable on/off footswitch

1430B

90-230V 50/60Hz - Variable on/off footswitch

with IEC connections

1430C

19

Description Welch Kit

Aspiration Kit - Includes: 6 ft tubing, 2000ml Autoclavable

jar w/lid, and two hydrophobic filters

1475K-20

ten hydrophobic filters

1475K-21

Welch Rietschle Thomas

Vacuum Pump Repair Facility

7301 North Central Avenue

Skokie, IL 60077

Phone: (847) 676-8800

Fax: (847) 677-8606 (Technical Support)

Fax: (920) 451-4397 (Ordering)

Copyright© 1997-2004 Welch Rietschle Thomas

Welch is registered trademarks of Welch Rietschle Thomas