25
THIS IS A REQUIREMENT OF THE ASME
CODE AND STATE REGULATIONS TO
PREVENT AN OVER PRESSURE
CONDITION WHICH COULD CAUSE
PERSONAL INJURY OR DEATH.
A tank mounted compressor should be
located as near the air usage point as
possible. Piping should be as short and as
direct as possible with a minimum number of
elbows and fittings. Never reduce aftercooler
or discharge line size. Never install dryers or
filters (except a moisture separator on
aftercooled units) in the aftercooler or
discharge line.
Manual shut off valves should also be
included in the service piping so that the
compressor and/or system receiver may be
isolated from the rest of the system to permit
servicing the compressor.
It is also necessary to install a drop leg and
valve in the service piping. Refer to Figure 10
for a typical piping arrangement.
All piping must be adequately supported to
prevent excessive strain on the compressor,
receiver, or plant storage receiver.
CHECKS TO BE MADE AT
INITIAL START UP
1. Make certain that all electrical and air
connections have been properly made.
2. Check the compressor reservoir oil level
and correct as required. (Use correct
type of oil)
3. Close the line disconnect switch.
4. Jog the compressor motor by actuating
the START switch and immediately
pushing the STOP switch. Observe the
air end for correct rotation.
NOTICE
ROTATION OF THE AIR END IS CORRECT
WHEN THE INPUT DRIVE SHAFT TURNS
COUNTER CLOCKWISE WHEN VIEWING
THE AIR END FROM THE DRIVESHAFT
END. (FAN - CLOCKWISE).
If rotation is incorrect, open the line
disconnect switch and rewire the power
feed line at the compressor to obtain
correct direction of rotation. After
rewiring return to Steps 3 and 4 to
double check rotation and correct as
required.
5. Close the system isolation valve.
6. Open the drop leg valve.
WARNING
AIR ESCAPING TO ATMOSPHERE IS
NOISY. ALWAYS WEAR EAR
PROTECTION TO PROTECT HEARING
AGAINST HIGH INTENSITY NOISE.
7. Start the unit.
8. Slowly close the system drop leg valve
and observe that when the system
receiver pressure reaches the full unload
pressure (110, 120, 135, or 160 psi) the
unit is fully unloaded (no additional
increase in receiver pressure; intake
valve closed) the blow down (dump)
valve has opened lowering unit receiver
pressure.
9. Slowly open and close the drop leg
valve to cycle the controls. If the controls
operate as described, the unit is ready
for use.
BE ALERT!
A CAREFUL OPERATOR
IS THE BEST INSURANCE
AGAINST AN ACCIDENT!!
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