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Section 1: SAFETY INFORMATION

I.10 

CAUTION: To prevent injury....

I.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.

I.12 

Keep the cord away from the heated surfaces.

I.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.

I.14 

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

I.15 

Wear safety glasses or goggles when operating this product.

I.16 

Use only in well ventilated areas. The motor is fan cooled enclosed in a shell.

   

WARNING

Do not operate the pumps in an atmosphere containing fl ammable or 

explosive gases/vapors.

   

WARNING

Never block the exhaust port. If the exhaust is blocked, pressure will 

build-up in the pump with the potential of the pump head bursting and 

causing possible injury to personnel in the area.

I.17 

All electrical products generate heat. To avoid serious burns never touch unit during or 
immediately after operation.

I.18   Be sure to properly identify intake and discharge before using pump. See Section II-5.

I.20 

CAUTION: To reduce risk of electrical shock....

I.21 

Do not disassemble. Disassembly or attempted repairs if accomplished incorrectly can create 
electrical shock hazard. Refer servicing to qualifi ed service agencies only: Call (847) 676-8800.

I.22 

Unit is supplied with a three  pronged plug. Be sure to connect pump to a properly grounded 
outlet only.

I.23 

WARNING:  To reduce risk of electrocution…

I.24 

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

I.25 

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

I.26 

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

I.27 

DANGER:  To reduce risk of  explosion or fi re…

I.28 

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

I.29 

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.

Summary of Contents for 2562C-02

Page 1: ...g acid base or organic vapors or gases Warning Be sure to properly identify intake and discharge before using pump Part No 642803A Printed in USA Welch Ilmvac 5621 W Howard Street Niles IL 60714 Phone...

Page 2: ...NTS Page No 1 Safety Information 3 2 Installation 5 3 Operation 8 4 Maintenance 8 5 Trouble Shooting 9 6 Specifications 9 7 Dimensional Drawings 10 8 Application Information 11 9 Exploded Parts List 1...

Page 3: ...ons 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 measureme...

Page 4: ...e potential of the pump head bursting and causing possible injury to personnel in the area I 17 All electrical products generate heat To avoid serious burns never touch unit during or immediately afte...

Page 5: ...plane 2 13 Pump Location and Environmental Condition The pressure vacuum pump should be located in a clean dry and well ventilated area Do not block the ventilation ports located on the motor housing...

Page 6: ...Identification Symbols Power Off Power On 2 24 Grounding Instructions This product should be grounded In the event of an electrical short circuit grounding reduces the risk of electric shock by provi...

Page 7: ...sure tends to vary from day to day As a result of variability the dial vacuum gauge will indicate slightly different maximum vacuum readings from day to day 2 30 Traps 2 30a The need for a Trap The pu...

Page 8: ...ection 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...

Page 9: ...the intake and reading the vacuum level on the gauge See Section 2 8 5 11 Troubleshooting Guide Poor Pumping Speed Poor Vacuum Loud Unit Possible Cause Corrective Action X X X Damaged Valves Replace...

Page 10: ...peed Curves 244 0 CORD ASSY 8 25 4X 8 32 UNC 2B THRU 7 09 6 67 9 45 INTAKE NIPPLE FOR 3 8 TUBING MUFFLER 11 67 OUTLET INLET 182 6 3 50 5 38 7 19 296 4 240 0 209 5 9 61 180 0 169 4 88 9 136 6 6 12 Dime...

Page 11: ...rt No Description 1 61 3576 Jar Lid Intake Machined 1 61 5142 Needle Valve 1 61 5148 Knob 1 624280 Hose Barb Fitting 1 624282 Hose Barb Fitting 1 66 0136 Hose Barb Fitting Straight 1 638788 Vacuum Gau...

Page 12: ...nt maximum vacuum readings from day to day The preset vacuum level may be adjusted by opening or closing the orifice A small leak through the orifice is provided to allow easy restart of the pump if y...

Page 13: ...04 Feet Kit 2500K 04 Muffler Kit 1412C 1 2 666544 Connecting Rod Ass y 2 2 2 621755 502 Valve Plate Assembly 2 3 2 628071 Cylinder O ring 2 2 4 2 623143 Valve Plate Gasket 2 2 5 1 641255 Exhaust Muff...

Page 14: ...pressed or implied The method of executing this warranty servicing adjusting repairing or replacing shall be at the discretion of Welch Ilmvac Vacuum pumps that have been operated within a vacuum syst...

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