Sullair TSR20, User Manual

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NOTES
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blowdown valve closes, and the inlet butterfly valve
opens. Also the air pressure at the spiral valve
actuator diaphragm is reduced through a vent hole at
the spiral valve differential pressure regulator, and a
spring in the actuator causes the spiral valve to
return to the full load (maximum) position.
AUTOMATIC OPERATION
For applications with varied periods of time when
there are no air requirements, Supervisor
llows the compressor to
shut down (time delayed) when no compressed air
requirement is present and restart as compressed air
is needed.
LOAD/ NO LOAD OPERATION
If applications call for load/no load operation, mod-
ulation can be disabled in the Supervisor
modulation is disabled, the unload pressure must be
reset to the rated load pressure of the machine. For
example, an L model rated for 100 psig full load
operation and 110 psig unload must have the unload
pressure reset to 100 psig. This ensures that the
motor will not run in an overload condition.
FUNCTIONAL DESCRIPTION
Refer to Figure 2-6 . The compressor inlet system
consists of two dry-type air filters, a vacuum switch
and an air inlet butterfly valve.
The vacuum switch located in the compressor
rol system, indicates the
splayed, maintenance is
required.
The butterfly-type air inlet valve directly controls the
amount of air intake to the compressor in response to
the operation of the Sullicon Control.
Figure 2-5: Air Inlet System
1. Air Inlet Filter
2. Inlet Butterfly Valve
3. Compressor Unit
4. Sullicon Control