2.
Figure 1. KI and KIV Compressor Identification (Typical).
1.3
Description of Air Flow
This manual covers several different models. Figures 2 and 3 show a conceptual representation of
component layout within the compressor package and may not depict a component’s exact location.
With the motor running and compressor operating, under loaded conditions, low pressure (slight vacuum)
is achieved at the compressor inlet. Ambient air, entering via the compressor inlet air filter, flows through
the inlet valve into the screw compressor, is compressed and discharged into the separator tank. The air
discharged from the compressor contains lubricant which is removed as the air passes through the
lubricant separator in the separator tank.
The compressed air then passes through the discharge element, minimum pressure check valve and the
aftercooler into the system. A separately-mounted optional moisture separator and drain are available to
remove liquid condensate from the air after it leaves the compressor assembly. An air receiver with an
effective drain valve can also serve this purpose.
The quantity of air entering the compressor is regulated by the inlet valve located between the air filter
and the compressor casing’s inlet port. The position of the inlet valve is automatically controlled during
normal operation by system air pressure, as briefly described in Section 1.6 of this manual and in more
detail in the Description of Operations / Display and Controls manual.
For all KI and KIV compressors the air inlet valve serves as a check valve when the unit is shut down.
This prevents air and lubricant from flowing backwards in the inlet filter during shut down.
The separator tank is equipped with an ASME safety relief valve and high pressure shut down to protect
the equipment in the event of a malfunction in the capacity and pressure control system.
Air pressure in the separator tank is continuously indicated by a pressure gauge located on the tank and
digital readout on the Control Display Panel (CDP). Maximum operating pressure is limited by compressor
drive motor horsepower, the ASME safety relief valve setting, or electrical supply capability.
Summary of Contents for KI Series
Page 1: ...1 Model __________________ Serial __________________ Rotary Screw Air Compressors...
Page 8: ...7 INTENTIONALLY BLANK...
Page 9: ...8 CHAPTER 1 GENERAL INFORMATION...
Page 19: ...10 CHAPTER 2 INSTALLATION INSTRUCTIONS...
Page 26: ...17 CHAPTER 3 ELECTRICAL INFORMATION...
Page 30: ...21 CHAPTER 4 COMPRESSOR LUBRICANT...
Page 39: ...30 INTENTIONALLY BLANK...
Page 40: ...31 CHAPTER 5 AIR INLET FILTER INFORMATION...
Page 43: ...34 INTENTIONALLY BLANK...
Page 44: ...35 CHAPTER 6 COMPRESSOR OPERATIONS...
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Page 50: ...41 CHAPTER 7 TROUBLESHOOTING...
Page 57: ...48 CHAPTER 8 FORMS RECORDS AND ELECTRICAL SCHEMATICS...
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