Central Pneumatic 68140 Set Up And Operating Instructions Manual page 10

KNOW YOUR AIR COMPRESSOR
See Figure 1.
Before attempting to use this product, familiarize yourself
with all operating features and safety rules.
DESCRIPTION
Your air compressor is aircooled, splash lubricated, belt-
driven, single stage.
DRIVE PULLEYS / FLYWHEELS
Drive pulleys and compressor flywheels must be properly
aligned and tensioned to specifications. (Refer to Belt
Alignment & Adjustment).
WARNING!
Excessive compressor RPM's could cause a pulley or
flywheel to shatter, possibly causing bodily harm or death.
Do not operate the compressor above the recommended
RPM as supplied by the factory.
GUARDS
They must provide protection from moving parts while still
allowing full air flow for cooling purposes.
WARNING!
Guards must be fastened in place before starting the
compressor. Always stop the unit before removing the
guard.
CHECK VALVES
Check valves are designed to allow air to flow freely in
one direction only. A properly sized check valve must be
provided in the discharge line. Do not rely on a check
valve to isolate a compressor from a pressurized tank
or compressed air delivery system during maintenance
procedures.
PRESSURE REGULATOR KNOB
The pressure regulator knob allows the operator to
control the amount of air pressure being supplied to a tool
(through the hose). A gauge is provided to indicate the air
pressure. To adjust the amount of air pressure supplied:
Pull up on the regulator knob to unlock it.
Turn the knob clockwise to increase pressure -
counterclockwise to decrease pressure.
Push the knob down to lock it into position.
REGULATOR PRESSURE GAUGE
The current line pressure is displayed on the regulator
pressure gauge. This pressure can be adjusted by rotating
the pressure regulator knob.
FEATURES
SAFETY VALVES
Safety valves aid in preventing system failures by relieving
system pressure when compressed air reaches a pre-determined
pressure level. All air receivers must be equipped with an
adequately sized safety valve. This type of valve is preset by the
manufacturer and must not be modified in any way.
Safety valves are to be placed ahead of any potential
blockage point which includes, but not limited to, shutoff
valves, heat exchangers, pulsation dampeners, and
discharge silencers. Ideally the safety valve should be
threaded directly into the pressure point it is sensing, not
connected with tubing or pipe, and always pointed away
from any chance bystander. All tubing or piping added must
be the same size as the safety valve opening or larger.
WARNING!
Safety valves must be provided to protect compressed
air systems. Failure to provide properly sized pressure
safety valves may cause property damage, severe
personal injury or even death.
COMPRESSOR CONTROLS
Gasoline engine driven compressors are equipped with
constant run controls and operate continuously until they
are manually shut-off. During operation, air is compressed
and delivered to the tanks for use. Once the demand for
compressed air is satisfied, the in-line unloader (located
in the compressor discharge line) is activated, causing the
air delivered by the compressor to be discharged to the
atmosphere, and allowing the engine to run at a lower speed.
In this state, the system is considered to be "unloaded".
As the air stored in the tanks is used and the demand for
compressed air returns, the unloader is deactivated, the
engine runs at a higher speed, and the compressed air is
once again delivered to the tanks for use.
When starting an engine driven unit with air pressure in the
tank, flip the toggle on side of the pilot valve to the horizontal
position. This will unload the compressor and allow the
engine to start easier.
When the engine has run for a few minutes, flip the toggle
back to its original position.
AIR FILTER
This compressor is equipped with an air filter to provide a
clean air supply, an essential component to the satisfactory
operation of your compressor.
WARNING!
Never locate the compressor where toxic, volatile or
corrosive vapors, air temperatures exceeding 104°F,
water, or extremely dirty air could be ingested. The
compressor could be damaged by these atmospheres
and result in injury or death.
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