DeVilbiss FA752-3 - Manual (Page 7)

7 — ENG MGP-FA752-3A
SCFM or CFM: Standard Cubic Feet per Minute; a unit of
measurement of air delivery.
PSIG or PSI: Pounds per square inch gauge.
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
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.
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.
GLOSSARY
DUTY CYCLE
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.
ALWAYS SET THE PRESSURE VALVE AT OR BELOW
THE REQUIRED PRESSURE FOR THE ACCESSORY
BEING USED BEFORE STARTING YOUR COMPRES-
SOR. FOR INFLATION OR OTHER USES REQUIRING
ACCURATE PRESSURE, USE A PRESSURE GAUGE.
DESCRIPTION OF OPERATION