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Welch

Owners Manual

FOR PRESSURE/VACUUM PUMP MODEL 2511

Contents: Safety Information

Installation

Operation

Maintenance

Speciﬁ cations

Warranty

Read and understand the following information and instructions included with your Welch Pressure/Vacuum

Pumps before using. This information is for your safety and to prevent damage to the pump.

I. SAFETY INFORMATION

I-1. CAUTION: TO PREVENT INJURY…

I-1a. 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 service center for examination and repair.

I-1b. Keep the cord away from heated surfaces.

I-1c. Never block any air openings. The air openings are for ventilation of the motor inside the plastic housing.

Keep all air openings free of lint, dirt and other foreign objects.

I-1d. Never drop any object into any openings.

I-1e. This pump has a single use (fuse) type of overload protector. If the motor should overheat, the protector will

shut the unit off. If this should occur, unplug the pump and contact the service center.

I-1f. Do not use any tools or attachments without ﬁ rst determining maximum air pressure for that tool or

attachment.

I-1g. Be sure to properly identify vacuum and pressure ports before using pump. See labels on pump next to

hose ﬁ ttings.

I-2. WARNING: TO REDUCE RISK OF ELECTROCUTION…

I-2a. Do not use this product in or near an area where it can fall or be pulled into water or other liquids.

I-2b. Do not reach for this product if it has fallen into liquid. Unplug immediately.

I-2c. Use indoors only.

I-3. DANGER: TO REDUCE RISK OF EXPLOSION OR FIRE…

I-3a. Do not use this pump in or near explosive atmospheres or where aerosol (spray) products are being used.

1-3b. Do not use this station for organic, basic or acidic vapors.

I-3c. Do not use this station in or near an area where ﬂ ammable or explosive liquids or vapors may exist.

I-3d. Do not use this product near ﬂ ames.

I-4. SERVICING OF A DOUBLE-INSULATED PRODUCT

I-4a. 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 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 qualiﬁ ed service personnel. Replacement parts for a double-insulated product must

be identical to those parts in the product.

CLASSIFICATION AND SYMBOL GLOSSARY

Double Insulated On (power) Off (power)

1Printed in U.S.A. Part No. 642317 Rev. D 06/09

Summary of content (4 pages)

PAGE 1
Welch® Owners Manual FOR PRESSURE/VACUUM PUMP MODEL 2511 Contents: Safety Information Installation Operation Maintenance Specifications Warranty Read and understand the following information and instructions included with your Welch Pressure/Vacuum Pumps before using. This information is for your safety and to prevent damage to the pump. I. SAFETY INFORMATION I-1. I-1a. CAUTION: TO PREVENT INJURY… Never operate this product if it has a damaged cord or plug.
PAGE 2
II. INSTALLATION II-1. INTRODUCTION This manual has been compiled not only for the care and maintenance of the Welch Dry Pressure/Vacuum pump now in your possession, but as a helpful reference and guide to prevent many problems which can occur if used improperly. II-2. UNPACKING Carefully remove the Pressure/Vacuum pump from the shipping carton. Preserve all paperwork for future reference.
PAGE 3
III. OPERATION III-1. STARTING PROCEDURES III-1a. STARTING THE PRESSURE/VACUUM PUMP. Before attaching the pump to a system we recommend you familiarize yourself with the function and action of the Pressure/Vacuum pump which you have acquired. Review the power requirements as described in Section II-6. We recommend running the pump for a few minutes to warm it up before use. The warm-up improves the pump ability to handle humid air. III-1b.
PAGE 4
VI. SPECIFICATIONS Welch Cat. No. Free Air Displacement, CFM (L/min) Max. Continuous Pressure PSIG (Pascal) Max. Intermittent Pressure PSIG (Pascal) Max. Vacuum, InHg (mmHg) Tubing Needed, I.D. in. Weight, pounds (kg) 2511B-01 2511C-02 2511C-05 2511C-06 0.39 (11) 0.32 (9.2) 0.32 (9.2) 0.32 (9.2) 10 (104) 10 (104) 10 (104) 10 (104) 33 (3.3 x 104) 33 (3.3 x 104) 33 (3.3 x 104) 33 (3.3 x 104) 21.3 (219) 21.3 (219) 21.3 (219) 21.3 (219) 1/4 1/4 1/4 1/4 5 (2.3) 5 (2.3) 5 (2.3) 5 (2.