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Thermal Overload Protector
If thermal overload protector shuts motor
OFF frequently look for the following
causes.
1. Low voltage.
2. Wrong gauge wire.
3. Dirty air filter.
4. Lack of proper ventilation.
5. Unit is being used with an extension
cord.
6. Low oil level
See Troubleshooting Chart for corrective
action.
This compressor is equipped
with an automatic reset thermal
overload protector which will
shut off motor if it becomes
overheated.
!
CAUTION:
The motor must be allowed to
cool down before start-up is
possible. The motor will auto-
matically restart without warn-
ing if left plugged into electrical
outlet, and the motor is turned
on.
!
CAUTION:
ASME Safety Valve
A safety valve that automatically releases
the air if the air receiver (tank) pressure
exceeds the preset maximum.
PSI (Pounds per Square Inch)
Measurement of the pressure exerted by
the force of the air. The actual psi output is
measured by a pressure gauge on the com-
pressor
SCFM (Standard Cubic Feet per Minute)
Sometimes called CFM (Cubic Feet per
Minute). Measurement of air volume deliv-
ered by the compressor.
Air Delivery
A combination of psi and SCFM. The air
delivery required by a tool is stated as
(number) SCFM at (number) psi. The com-
bination of these figures determines what
size unit is needed.
Air Tank Capacity
The volume of air stored in the tank and
available for immediate use. A large tank
allows the intermittent use of an air tool
with an air requirement higher than the
compressor’s rated delivery.
Volts or Voltage
A measurement of the force of an electrical
current.
Amps or Amperage
A measure of the electrical force minus the
resistance on an electrical line. Ridgid air
compressors require 15 amps for operation.
Be sure the compressor will operate on an
electrical line with the proper amps. If other
appliances operate on the same line, they
will reduce the available amps. If the
amperage is not adequate, the result will be
blown fuses or tripped circuits.
Regulator
A control that adjusts the line pressure to
the proper amount needed to operate spray
guns and air tools.
Tanks Pressure Gauge
Indicates tank pressure in psi.
Regulated Outlet Gauge
Displays the current line pressures. It is
regulated by the regulator knob.
Cut-in/Cut-off Pressure
Specific psi at which a compressor starts
and stops while refilling the air tank.
Glossary of Terms