If equipment fails to operate, refer to troubleshooting procedures in Chapter 3.
Section I. OPERATING PROCEDURES
Controls and Instruments.
g. ON-OFF Starter Switch. The on-off starter
This section describes, locates,
switch (fig. 1-1) is a manually actuated switch located
illustrates and furnishes the operator sufficient
top center of the motor starter box cover. In OFF
information pertaining to the various controls and
position the compressor motor will not operate. When
instruments provided for the proper operation of the air
the selector is turned to ON position the compressor will
operate until pressure in air receiver tank reaches 190
psi (13.36 kgs per sq cm) then the pressure switch
b. Globe Valve.
automatically shuts-off the motor. The compressor will
mounted on the end of the air receiver tank is a manually
recycle again automatically when pressure drops below
operated valve that opens the flow of compressed air to
165 psi (11.60 kgs per sq cm) and continue to cycle
the air hose.
automatically in this ON position.
h. Reset Button.
on the underside of the air receiver tank is a manually
mounted on the cover of the magnetic starter, below the
operated valve used to drain compressed air and
ON-OFF switch, is a manually operated button, which
when pushed, resets the thermal relay in the magnetic
should be drained daily when the air compressor is in
i. Pressure Switch.
The pressure switch (fig. 1-2)
is mounted on the top of the air receiver tank at the
mounted in the compressor crankcase is a direct
motor end. It automatically shuts off the motor when the
reading, glass covered gage used to check the level of
pressure in the air receiver tank reaches 190 psi (13.36
kgs per sq cm). The pressure switch will automatically
recycle the compressor when the pressure drops below
e. Air Receiver Tank Pressure Gage. The air
165 psi (11.60 kgs per sq cm).
receiver tank pressure gage (fig. 1-1) mounted on the
side of the air receiver tank, is a needle-indicating,
j. Inflator Gage.
direct-reading, pressure-operated gage graduated in
controls and indicates the amount of air being
pounds per square inch (psi) and kilograms per square
centimeter (kgs per sq cm), the gage is graduated from 0
to 300 psi in increments of 5 psi, and from 0-21.1 kgs sq
Operation Under Usual Conditions.
cm in increments of 50 centimeters. The gage indicates
the air pressure in the air receiver tank.
a. General. The instructions in this section are
operating pressure is 165 psi (11.60 kgs per sq cm) to
published for the operation of the air compressor. It is
190 psi (13.36 kgs per sq cm).
essential that the operator know how to perform every
operation of which the air compressor is capable. This
f. Safety Relief Valve. The safety relief valve (fig.
section gives instructions on starting and stopping, and
of the air receiver tank
motor end. It is a preset valve that is actuated when the
air receiver tank receives a pressure of 200 psi (14.06
kgs per sq cm) or more. This valve can be tripped
manually by pulling up on the ring at the end. It is
(1) Inspect the electric motor to make sure it
manually tripped to release pressure in the air receiver
is properly wired from incoming power source and that
tank and to test the valve.
power is on.