Iq System; Theory Of Operation - Doosan XHP1000WCAT-T4i Operation And Maintenance Manual

Operation & Maintenance Manual

IQ System

The IQ System is a complete, self-contained system which provides cooler, cleaner air than
from a standard portable compressor. The system utilizes an integral aftercooler,
high-efficiency filtration, and a patented condensate disposal system to provide the cool, clean
air. The condensate disposal system injects all liquid condensed from the moisture separator
and filters into the engine exhaust system where it is vaporized by heat. This eliminates the
need for collecting the condensate and the added cost of disposing of the condensate, which
is often regulated by local, state, and/or federal regulations.
The IQ System automatically adjusts movable louvers to control airflow through the
aftercooler, ensuring that the compressed air temperature always remains above freezing
temperatures, typically 45°F (7°C) at any ambient temperature down to the low limit of the
ambient temperature range. This prevents the need for AC heat tracing systems or any
manual adjustment to prevent freezing of the compressed air system. All drain points for the
condensate handling system are heated with 24VDC heaters which are integral to the
compressor heater system.
Do not operate aftercooler at temperatures less than 36°F (2°C) unless
equipped with Low Ambient IQ option.

Theory of Operation

The compressed air exits the separator tank through the top cover piping and can then travel
along one of two paths, selectable via manual valving.
One path allows Standard Operation, which bypasses the IQ System, and delivers air quality
equivalent to a standard oil-flooded portable compressor. If the IQ System is enabled by
proper setting of the selector valve, the compressed air first enters the aftercooler.
The aftercooler is cooled by the incoming compressor package air, which is controlled by
movable louvers mounted on the aftercooler. At most conditions, the louvers are fully open and
maximum aftercooling is available. The compressed air and condensate (water with a small
amount of compressor oil) exits the aftercooler and enters the moisture separator where most
of the condensate is removed. The compressed air then flows through two stages of filtration,
where the aerosol oil is removed down to approximately 0.01 ppm and all particulates are
removed down to 0.01 micron.
At the bottom of the moisture separator and both filters are strainers and constant-bleed
orifices, which are sized to allow the maximum flow of condensate while minimizing
compressed air loss.
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NOTICE
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