Porter-Cable CPL6025 Instruction Manual page 7

DESCRIPTION OF OPERATION
Drain Valve (A) Fig. 1: The drain valve is located at the base of
the air tank and is used to drain condensationat the end of
each use.
Motor Thermal Overload Protector (not shown)= The
electric motor has an automatic thermal overloadprotector. If
the motor overheats for any reason, the thermal overload
\
protector will shut off the motor. The motor must be allowed to A
cool before restarting.
ON/AUTO- Fig. 1
B G D OFF Switch (B) Fig. 2: Turnthis
switch ON to provide automatic
power to the pressureswitch and
OFF to remove power at the end of
each use.
Air Intake Rlter (not shown): 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 (not shown):
To compress air,the piston movesup
and down in the cylinder. On the
Fig. 2 downstroke, air is drawn in through
the air intake valves.The exhaust
valve remainsclosed. On the upstroke of the piston,air iscompressed. The intake
valves close and compressed air is forced out throughthe exhaustvalve, intothe outlet
tube, throughthe check valve and intothe air tank. Working air is not available untilthe
compressor has mieed the air tank pressureabove that required at the air outlet.
Check Valve (C) Fig. 2:. When the air compressoris 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", aUowingair pressure to remain
insidethe air tank.
P_ssure Release Valve (I) Rg. 2: The pressurerelease valve located on the side of
the pressure switch, is designed to automaticallyreleasecompressed air from the
compressor head and the outtettube when the air compressor reaches"cut-out"
pressureor is shut oft. The oreasuro release valve allowsthe motor to restartfreely.
When the motor etODSrunnino,air will be heard eecaDino from thisvalve for a few
seconds. No air shouldbe heard leekine when the motor is runnino,or continuous
leekinoafter unit reachescut-out Dressure.
Pressure Switch (D) Fig. 2: The pressureswitch automaticallystartsthe motor when
the air tank pressuredropsbelow the factory set "cut-in" pressure. It stops the motor
when the airtank pressure reachesthe factory set "cut-out" pressure.
Safety Valve (E) Fig. 2: If the pressureswitch does not shut offthe air compressorat its
cut-out pressure setting,the safety valve will protect against high pressure by "popping
out"at its factory set pressure (slightS/higher than the pressureswitch cat-out setting).
Outlet Pressure Gauge (P) Fig. 2: The outlet pressure gauge indicatesthe air pressure
availableat the outlet side of the regulator. This pressureis controlledby the regulator
and is alwaysless than or equal to the tank pressure.
Tank Pressure Gauge (G) Fig. 2: The tank pressuregauge indicatesthe reserve air
pressurein the tank.
Regulator (H) Fig. 2: The air pressurecoming from the air tank is controlled by the
regulatorknob. Turn the knob clockwise to increasepressureand counterclockwiseto
decrease pressure.To avoid minorreadjustmentafter making a change in pressure
setting, alwaysapproach the desired pressure from a lower pressure. When reducing
from a higher to a lower setting,first reduceto some pressureless than that desired,
then bring up to the desired pressure.Depending on the air requirementsof each
particularaccessory,the outlet regulated air pressuremay have to be adjusted while
you are operatingthe accessory.
7-ENG D24938