DeVillbiss Air Power Company MGP-SL10120H-2A, L10120H2-2 owner manual Description of Operation

DESCRIPTION OF OPERATION

Drain Valve: At the base of the air tank to drain condensation at the end of each use.

ON/AUTO-OFF Switch: Turn this switch ON to provideautomaticpowertothepressureswitchandOFF to remove power.

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".

AirCompressorPump: 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: 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.

PressureReleaseValve: 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

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: 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: Turn the knob counterclockwise to open the valve and clockwise to close.

AirTankSafetyValve: 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).

AftercoolerSafetyValve: 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: 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: 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.

MGP-SL10120H-2A 8—ENG