54
CHAPTER 4: OPERATION
087-0067 REV A
SCOTT SAFETY
Compressor Overview
In general, takes in ambient air and converts it into breathing air by way of various
subsystems as outlined here:
•
Electrical subsystem - Electrical current (VAC) is used to power a motor inside the
compressor that drives the compressor through a vee belt.
•
Filter and compression stages - The compressor, takes in ambient air that is filtered
and then compressed in five stages. Each stage is equipped with a standard safety
value, set slightly above the normal working pressure of that stage. The value
releases high pressure air to protect the system in case of mechanical failure. These
pressures are displayed, depending on the model, on the analog gauges or the HMI.
•
Fan - The air circulating fan mounted on the flywheel is used to blow cooling air
through the five stage air coolers and over the compressor head cooling fans. Air
passing through the air coolers serves to lower the air temperature in increase
compressor efficiency.
•
Moisture separators - Moisture separators continuously remove moisture from the
compressor intercooler and after-cooler air circuits. During normal operation, the
dump solenoid values are activated automatically every 15 minutes. The
condensate container collects the moisture from the moisture separators. The
container is drained as needed.
•
Discharge pressure achieved - When the discharge pressure reaches the maximum
preset level, the compressor is unloaded. The moisture traps open, and the
compressor continues to run without compressing air. Prior to stopping, the
compressor runs unloaded through a cool-down cycle while draining the moisture
separators and cooling down the compressor stages. This prevents the
development of rust in the compression cylinders and also provides for an
unloaded compressor restart.
•
Purification process - After the pressurized air leaves the compressor, it passes
through a multi-stage purification system. The number of stages depends on the
horse power, and therefore the air output capacity of the compressor. The higher
the air output, the more purification elements are needed. The purification system
further dries the air and removes other impurities. After this, the breathable air
may go directly to a charge station, to fill SCBA cylinders, or may be sent to
ASME high pressure storage cylinders.
Содержание HushAir Connect 7500
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Страница 3: ...HushAir Connect 7500 User Guide COMPRESSOR SYSTEM 087 0067 Rev A ...
Страница 8: ...IV CONTENTS 087 0067 REV A SCOTT SAFETY ...
Страница 12: ...X LIST OF TABLES 087 0067 REV A SCOTT SAFETY ...
Страница 42: ...20 CHAPTER 2 INSTALLATION 087 0067 REV A SCOTT SAFETY ...
Страница 73: ...Configuring the System 51 SCOTT SAFETY 087 0067 REV A Figure 27 Override Status Screen ...
Страница 106: ...84 CHAPTER 5 MAINTENANCE 087 0067 REV A SCOTT SAFETY Figure 48 Oil Drain Location 3 1 2 ...
Страница 112: ...90 APPENDIX A SPECIFICATIONS 087 0067 REV A SCOTT SAFETY ...
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Страница 120: ...Monroe Corporate Center P O Box 569 Monroe NC 28111 Telephone 800 247 7257 FAX 704 291 8330 Web www scottsafety com ...