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8—ENG
MGP-SL10120H-2A
DESCRIPTION OF OPERATION
to restart freely. When the motor stops running, air will
be heard escaping from the valve for a few seconds. No
air should be heard leaking when the motor is running.
Pressure Switch: Pressure Switch:
Pressure Switch: Pressure Switch:
Pressure Switch: The pressure switch automatically
starts the motor when the air tank pressure drops below
the factory set "cut-in" pressure. It stops the motor
when the air tank pressure reaches the factory set "cut-
out" pressure.
Shut-off Valve:Shut-off Valve:
Shut-off Valve:Shut-off Valve:
Shut-off Valve: Turn the knob counterclockwise to
open the valve and clockwise to close.
Air Tank Safety Valve:Air Tank Safety Valve:
Air Tank Safety Valve:Air Tank Safety Valve:
Air Tank Safety Valve: If the pressure switch does not
shut off the air compressor at its cut-out pressure
setting, the safety valve will protect against high pres-
sure by "popping off" at its factory set pressure (slightly
higher than the pressure switch cut-out setting).
Aftercooler Safety Valve:Aftercooler Safety Valve:
Aftercooler Safety Valve:Aftercooler Safety Valve:
Aftercooler Safety Valve: On two stage compressor
units, safety valve is provided to prevent over-pressuri-
zation of the aftercooler. The valve will protect the
aftercooler by "popping off" at its factory set pressure.
Regulator:Regulator:
Regulator:Regulator:
Regulator: An air pressure regulator or a separate air
transformer which combines the functions of air regula-
tion and/or moisture and dirt removal is recommended
for most applications.
Tank Pressure Gauge:Tank Pressure Gauge:
Tank Pressure Gauge:Tank Pressure Gauge:
Tank Pressure Gauge: The tank pressure gauge
indicates the reserve air pressure in the tank. On outfits
with no pressure regulator, this is also the pressure
available at the air outlet.
Drain Valve:Drain Valve:
Drain Valve:Drain Valve:
Drain Valve: At the base of the air tank to drain
condensation at the end of each use.
ON/AUTO-OFF Switch:ON/AUTO-OFF Switch:
ON/AUTO-OFF Switch:ON/AUTO-OFF Switch:
ON/AUTO-OFF Switch: Turn this switch ON to
provide automatic power to the pressure switch and OFF
to remove power.
Air Intake Filter:Air Intake Filter:
Air Intake Filter:Air Intake Filter:
Air Intake Filter: This filter is designed to clean air
coming into the pump. This filter must always be clean
and ventilation openings free from obstructions. See
"Maintenance".
Air Compressor Pump:Air Compressor Pump:
Air Compressor Pump:Air Compressor Pump:
Air Compressor Pump: In two stage compressors, air
is first compressed to an intermediate pressure in the
large bore cylinder, and after passing through an inter-
cooler, the air is further compressed to a higher pressure
in the smaller bore cylinder. This process continues until
the air tank pressure reaches the factory set cutoff
pressure. At that point the pressure switch shuts the
electric motor off.
Check Valve:Check Valve:
Check Valve:Check Valve:
Check Valve: When the air compressor is operating,
the check valve is "open", allowing compressed air to
enter the air tank. When the air compressor reaches
"cut-out" pressure, the check valve "closes", allowing
air pressure to remain inside the air tank.
Pressure Release Valve:Pressure Release Valve:
Pressure Release Valve:Pressure Release Valve:
Pressure Release Valve: The pressure release valve
located on the side of the pressure switch, is designed
to automatically release compressed air from the com-
pressor head and the outlet tube when the air compres-
sor reaches "cut-out" pressure or is shut off. If the air
is not released, the motor will try to start, but will be
unable to. The pressure release valve allows the motor