Welch Vacuum 2546 User Manual

WELCH-IL

OWNER’S MANUAL FOR

WOB•L® PISTON PRESSURE/VACUUM PUMPS MODELS:

2522C-05, 2534C-01, 2534C-02, 2546B-01, 2546C-01, 2546C-02,

& 2546C-10

MV

A

C

Warning

Not recommended for pumping acid, base or organic

vapors or gases.

Warning

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

See Section 2.50

Welch-Ilmvac
5621 W. Howard Street
Niles, IL 60714
Phone: [phone] (Technical Support)
Fax: [phone]
E-Mail: [e-mail] Printed in USA
Web-Page: www.welchvacuum.com Part No. 642517G

For outside of U.S. and Canada, contact your local
Gardner Denver sales offi ce.

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 confi rm to the (SI) International system of units of measurement.

The following symbols (with recommendation of IEC61010) 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.

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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

2.50 Intake and discharge provisions

2.60 Vacuum connections

2.70 Vacuum and pressure gauges

Section 03 - Electrical Power

3.10 Power source review

3.20 Overload protection

Section 04 - Traps

4.10 The need of a trap

4.20 The care of a trap

Section 05 - Operation

5.10 Starting a welch pressure/vacuum pump

5.20 Cleanliness

5.30 Leak detection

5.40 Operating pressure range

5.50 Shutdown procedures

Section 06 - Maintenance

6.10 Maintenance on a welch pressure/vacuum pump

Section 07 - Troubleshooting

7.10 Vacuum problems

7.20 Pressure problems

7.30 Troubleshooting guide

Section 08 - Specifi cations

8.10 Specifi cation table

Section 09 - Warranty

Section 10 - Exploded views and parts list

10.10 Exploded views and parts list for model’s 2546B-01, 2546C-01, 2546C-02, 2546C-10

10.20 Exploded views and parts list for model’s 2522C-05, 2534C-01, 2534C-02

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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.

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Section 2: INSTALLATION

2.10 INTRODUCTION

2.11 This manual has been compiled not only for the care and maintenance of the Welch Dry Dual

Function Pressure/Vacuum pump now in your possession, but as a helpful reference and guide
to prevent many problems which can occur if used improperly.

2.20 UNPACKING

2.21 Carefully remove the Pressure/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, 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 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-fl exible surface such as a bench top; they help to isolate noise and eliminate creeping.

2.40 PUMP LOCATION

2.41 The pressure/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.

WARNING

The motor is thermally protected and will automatically restart

unexpectedly when the overload device resets. Don’t pump

fl ammable or explosive gases or vapors or operate this pump in

an atmosphere containing fl ammable or explosive gases or vapors.

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