DeVilbiss FA125-1 Troubleshooting Guide download pdf (Page 7)

DESCRIPTION OF OPERATION

Air Compressor Pump: To compress air, the piston

moves up and down in the cylinder. On the downstroke,

air is drawn in through the air intake valves. The exhaust

valves remain closed. On the upstroke of the piston, air

is compressed. The intake valves close and compressed

air is forced out through the exhaust valves, through the

outlet tubes, through the check valve and into the air tank.

Working air is not available until the compressor has

raised the air tank pressure above that required at the air

outlet.

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: This unit DOES NOT require

a pressure release valve.

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.

Motor Thermal Overload Protector: The electdc

motor has an automatic thermal ovedoad protector. If the

motor overheats for any reason, the thermal overload

protector will shut off the motor. The motor must be

allowed to cool before restarting.

Regulator: The air pressure coming from the air tank is

controlled by the regulator. Turn the regulator knob

clockwise to increase pressure and counter-clockwise to

decrease pressure. To avoid minor readjustment after

making a change in pressure setting, always approach

the desired pressure from a lower pressure. When

reducing from a higher to a lower setting, first reduce to

some pressure less than that desired, then bring up to the

desired pressure. Depending on the air requirements of

each particular accessory, the outlet regulated air pres-

sure may have to be adjusted while operating the acces-

sory.

OutJet Pressure Gauge: The outlet pressure gauge

indicatesthe air pressure available at the outlet side of the

regulator. This pressure is controlled bythe regulator and

is always less or equal to the tank pressure. See

"Operating Procedures".

Tank Pressure Gauge: The tank pressure gauge

indicates the reserve air pressure in the tank.

Cooling System: This compressor contains an ad-

vanced design cooling system. At the heart of this cooling

system is an engineered fan. It is perfectly normal for this

fan to blow air through the vent holes in large amounts.

You know that the cooling system is working when air is

being expelled.

Air Intake Filter: The advance design of this unit

requires no air filter.

Drain Valve: The drain valve is located at the base of

the air tank and is used to drain condensation at the end

of each use.

On/Auto-Off Switch: Turn this switch ON to provide

automatic power to the pressure switch and OFF to

remove power at the end of each use.

INSTALLATION AND BREAK-IN PROCEDURES

Location of the Air Compressor

Your compressor comes to you completely assembled

and ready for use. Operate the air compressor in a dry,

clean, cool and well ventilated area. The air compressor

pump and case are designed to allow for proper cooling.

Clean or blow off dust or dirt that collects on the air

compressor. A clean air compressor runs cooler and

provides longer service. The ventilation openings on

your air compressor are necessary to maintain proper

operating temperature. Do not place rags or other

containers on or near these openings.

Voltage and Circuit Protection

See front cover.

Extension Cords

Use extra air hose instead of an extension cord to

avoid voltage drop and power loss to the motor.

If an extension cord must be used, be sure it is:

a 3-wire extension cord that has a 3-blade ground-

ing plug, and a 3-slot receptacle that will accept

the plug on the compressor

in good condition

no longer than 50 feet

14 gauge (AWG) or larger. (VVire size increases

asgauge number decreases.) 12 AWG, IOAWG

and 8 AWG may also be used. DO NOT USE 16

OR 18 AWG.

1 2 3 4 5 6 7 8 9 10 11 12

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DeVilbiss FA125-1 Troubleshooting Guide Page 7

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