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The pressure switch starts and stops the compressor while in the automatic mode. The pressure input to
this switch is the plant pressure, measured within the package. The switch is wired to an input of the
electronic controller.
Thermistors are located in the air system directly after the compressor and after the separator. These
sense the temperature at these two locations, and are wired back to the electronic controller.
The electronic controller takes these inputs above and controls two output devices. The first is the coil of
the starter, which starts and stops the compressor in response to the pressure switch. The second output
is wired directly to a solenoid valve which loads the compressor. The indicator lights on the controller aid
in servicing the compressor. Refer to SECTION 9, page 42, “Troubleshooting the AutoSentry T Electronic
Controller” for detailed information.
#1
Red
Compressor temperature fault indicator
#2
Red
Separator temperature fault indicator
#3 Yellow High/low
temperature
warning
#4
Green
Automatic mode indicator
#5 Green Power-on
indicator
CAUTION
Machine damage will occur if compressor is repeatedly restarted after any one
of the shutdown modes stops operation of the unit. Find and correct the
malfunction before resuming operation.
SETTING THE LOAD/UNLOAD PRESSURE SETPOINTS
WARNING
Electrical shock can cause injury or death. Open main disconnect and any
other circuits, lockout and tagout before working inside the control box.
Compressor start and stop pressures are controlled by the pressure switch mounted at the compressor
control box. To change the settings, disconnect and lock out power to the compressor, relieve all
pressure from the receiver tank. Connect an accurate gauge to the tank, and remove the cover from the
switch. Read directions on the switch for details on locations of the adjusting screws.
DANGER
Air/oil under pressure will cause severe personal injury or death. Shut down
compressor, relieve system of all pressure, disconnect, lockout and tagout
power supply to the starter before removing valves, caps, plugs, fittings, bolts
and filters.
Summary of Contents for CHAMPION ROTORCHAMP EFB99B
Page 9: ...13 8 620 Page 2 13 8 620 Page 2 300EFB797 A Ref Drawing Figure 1 2 COMPRESSOR ILLUSTRATION...
Page 12: ...13 8 620 Page 5 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 13: ...13 8 620 Page 6 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 30: ...13 8 620 Page 23 Figure 4 3 WIRING DIAGRAM 300EFB542 D Ref Drawing...
