Welch Vacuum 2561B-50 User Manual

WELCH-IL

OWNER’S MANUAL

FOR

WOB•L® PISTON VACUUM PUMP

MODELS:
2561B-50 2563B-24
2561C-50 2563C-24
2561C-56 2563C-25

MV

A

C

Not recommended for pumping acid, base or organic vapors or gases.

Be sure to properly identify intake and discharge before using pump.

Welch-Ilmvac
5621 W. Howard Street
Niles, IL 60714
Phone: [phone] (Technical Support)
Fax: [phone]
E-Mail: [e-mail]
Web-Page: www.welchvacuum.com

Warning

Warning

See section 2.5

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

Gardner Denver sales offi ce.

Part No. 642826

Printed in USA

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 conform 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

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 Warning to prevent injury

1.20 Warning to reduce risk of electrical shock

1.30 Warning to reduce risk of electrocution

1.40 Warning to reduce risk of explosion or fi re
Section 02 - Installation

2.10 Introduction

2.20 Unpacking

2.30 Pump mounting

2.40 Pump location / Environmental conditions

2.50 Intake and discharge provisions

2.60 Electrical power

2.70 Vacuum connections

2.80 Vacuum and gauges

2.90 Traps
Section 03 - Operation

3.10 Starting procedures

3.20 Leak detection

3.30 Pressure range

3.40 Shutdown procedures
Section 04 - Maintenance

4.10 General Maintenance
Section 05 - Troubleshooting

5.10 Vacuum problems

5.20 Troubleshooting table
Section 06 - Specifi cations

6.10 Specifi cation chart

6.20 Pumping speed curve
Section 07 - Warranty
Section 08 - Exploded views and parts list

8.10 Dimensional Drawing

8.20 Exploded view and parts list

3

Section 1: SAFETY INFORMATION

1.10 WARNING: 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 Never drop or insert fi ngers or any other object into any openings.

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

1.16 This pump is thermally protected and can automatically restart when the protector resets.
Always disconnect power source before servicing.

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. The motor on all pumps are totally enclosed fan cooled

1.19 Do not use any tools or attachments without fi rst determining maximum air pressure for that
tool or attachment. Be sure to properly identify intake and discharge before using pump. See
Section 2.50

1.20 WARNING: 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 qualifi ed service agencies only.

1.22 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.

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

1.40 WARNING: 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
fl ammable or explosive liquids or vapors may exist.

1.44 Do not use this product near fl ames.

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 Dry
Vacuum Pump now in your possession, but as a helpful reference and guide to prevent many
problems which occur if used improperly

2.20 UNPACKING

2.21 Carefully remove the Vacuum Pump from the shipping case and unfasten and remove the
wooden skid. Preserve all paperwork for future reference. If damage has occurred from
shipment, a claim must be fi led 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
Technology, be sure to include your order numbers for quick identifi cation. Do not return the
pump to the factory without fi rst calling for a return goods number.

2.30 PUMP MOUNTING

2.31 Rubber feet are attached to the pump. Rubber feet are excellent for applications involving a
semi-fl exible surface such as a bench top; they help to isolate noise and eliminate creeping.
All Vacuum Pumps should be mounted on a horizontal plane.

2.40 PUMP LOCATION / ENVIRONMENTAL CONDITIONS

2.41 Pump Location:

The Vacuum Pump 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 pump
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 effi ciently.

2.42 Pump Environmental Conditions:

The pump is rated for indoor use only. Maximum altitude 2000 meters. Operating temperature

range 5°C to 40°C. Maximum relative humidity of 80% for temperatures up to 31°C decreasing
to 50% at 40°C. Rated for +/-10% of supply voltage. Pollution Degree 2, Installation Category
II.

WARNING

Don’t pump fl ammable or explosive gases or vapors or operate this

pump in an atmosphere containing fl ammable or explosive gases or

2.50 INTAKE AND DISCHARGE PROVISIONS

2.51 The intake fi tting is a NW25-fl ange / 1/4”NPT. A muffl er is supplied for the exhaust.

Bursting Hazard- use on exhaust port the silencer or air handling

Be sure to call Welch technical service prior to start-up at [phone] if you have any questions.

parts suitable for pressures not less than 100 PSIG

vapors.

WARNING

5