DeVillbiss Air Power Company 102D-3 owner manual Glossary, Duty Cycle, Description of Operation

GLOSSARY

SCFM or CFM: Standard Cubic Feet per Minute; a unit of measurement of air delivery.

PSIG or PSI: Pounds per square inch gauge.

U.L. Listed: Products with the U.L. mark are listed by Underwriters Laboratories, Inc. (U.L.). Samples of these products have been evaluated by U.L. and meet the applicable U.L. Standards for Safety.

DUTY CYCLE

All DeVilbiss Air Power manufactured air compressors should be operated on not more than a 50% duty cycle. This means an air compressor that pumps more than 50% of one

hour, is considered misuse, because the air compressor is undersized for the required air demand. Maximum com- pressor pumping time per hour is 30 minutes.

DESCRIPTION OF OPERATION

Air Compressor Pump: To compress air, the piston moves up and down in the cylinder. On the downstroke, air is drawn in through the air intake muffler (valves). The exhaust valve remains closed. On the upstroke of the piston, air is compressed. The intake valves close and compressed air is forced out through the exhaust valve and then through the air hose.

Adjustable Pressure Valve: The pressure valve controls the amount of pressure going from the air compressor to the accessory. The pressure adjusting valve can be used to set approximate pressure between 10 and 125 P.S.I. (125 P.S.I. is the highest pressure this compressor will deliver). It is normal for the adjustable pressure valve to release air during operation.

Accumulator Tank: Your accumulator tank is equipped with a relief (pop-off) valve to prevent an over pressure condition in the tank. This 2 gallon tank is not designed to store air, but rather to provide the additional volume of compressed air necessary to operate a wide variety of air tools. When starting your compressor, attach the tool to the hose, set the pressure adjusting valve at the required pressure, wait a few moments until the tank fills with air. You will know the tank is filled when you hear air bleeding through the pressure adjusting valve. Depending on the type and size of tool being used, you will occasionally need to wait for the tank to refill before continuing. When you are finsihed or changing tools, turn the compressor switch off and set the pressure adjusting valve to 10 PSI and wait for the tank to discharge completely.

ALWAYSSETTHEPRESSUREVALVEATORBELOW THE REQUIREDPRESSUREFORTHE ACCESSORY BEINGUSEDBEFORESTARTINGYOURCOMPRES- SOR.FORINFLATIONOROTHERUSESREQUIRING ACCURATEPRESSURE,USEAPRESSUREGAUGE.

7 —ENG

MGP-102D-3A