Stationary Air Compressor System Operating Instructions
3 - Starting and Operating
24
Compressor Stage Gauge Readings
Each of the four compression stages operates in a spe-
cic range of pressure to build to the maximum output
pressure. On the HUSH Air compressor, the compressor
stage gauges are located on the back of the compressor,
the side opposite the air purifying lters. On the Simple
Air Compressor, the stage gauges are located on the
front of the compressor system enclosure above the air
purifying lters.
If system pressure is not building properly, check all
four stage pressure gauge readings on the Compressor
Stage Pressure Panel. If any gauge does not reach its
stage pressure reading, notify your SCOTT authorized
service technician.
During a fteen-second drain cycle or a two (2) minute
cool-down cycle, the four gauges should all drop pressure
simultaneously. If any one gauge does not drop along
with the others, notify your SCOTT authorized service
technician.
After a fteen-second drain cycle, or an automatic restart,
all four gauges should return to their stage pressures
together.
The operator must check these gauges periodically while
the compressor is running to verify that the compressor
is operating properly. Each stage is equipped with a
suitable pressure relief safety valve designed to protect
the compressor.
Note the following stage pressure readings when the
compressor reaches its maximum pressure:
Operating the Compressor Continued...
9. If the X4 Controller is in AUTO mode, the compressor
will restart when pressure drops approximately 500
psi below maximum system pressure.
If the storage pressure was already FULL when
the system was started, the display will say
“Storage Full” and the compressor will still restart
automatically when the pressure drops.
If all Compressor Operating Parameters are in
tolerance, the system is ready to fill breathing
air cylinders. Proceed to the instructions for
charging breathing air cylinders provided with your
cylinder charging station (SCOTT RevolveAir or
Guardian).
NEVER attempt to perform service while the
compressor system is in use in the AUTO mode.
When the compressor system is in the AUTO
mode, the compressor will restart when the storage
pressure drops approximately 500 psi below
maximum pressure. This can happen at any time
without warning. Failure to observe this warning
could result in serious injury or death.
1 2 3 4
Stationary Air Compressor Stage Gauges
1) First Stage Pressure Gauge
2) Second Stage Pressure Gauge
3) Third Stage Pressure Gauge
4) Fourth Stage Pressure Gauge
HUSH Air Stage Gauge Pressure Readings
4-Stage 6000 psi compressor:
1st Stage 40 - 48 psi (2.8 - 3.3 bar)
2nd Stage 240 - 260 psi (16 - 18 bar)
3rd Stage 1000- 1175 psi (68 - 81 bar)
4th Stage 6000 psi (414 bar)
Purier Pressure 6000 psi (414 bar)
Simple Air Stage Gauge Pressure Readings
3-Stage 5000 psi compressor:
1st Stage 70 psi (5 bar)
2nd Stage 570 psi (40 bar)
3rd Stage 3200 - 5000 psi (225 - 330 bar)
4-Stage 6000 psi compressor:
1st Stage 78 psi (5.4 bar)
2nd Stage 445 psi (30.7 bar)
3rd Stage 1220 psi (84.1 bar)
4th Stage 6000 psi (414 bar)*
NOTE
The HUSH Air Compressor is equipped with a fth
gauge at the Purier Coalescer.
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