Low Ambient Operation - Doosan XHP1000WCAT-T4i Operation And Maintenance Manual

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The condensate lines are then piped together and the condensate is injected at a single point
into the engine exhaust piping.
The compressed air then travels through the check valve, and out through the service air
valve. The air pressure gauge on the instrument panel indicates the pressure inside the
separator tank.
If the IQ System is bypassed (Standard Operation selected), the delivered air pressure will be
approximately equal to the separator tank pressure. If the IQ System operation is selected, the
delivered air pressure will be slightly less, depending on the restriction of the filters.
The compressor regulation system is adjusted to maintain regulated
pressure at the separator tank. DO NOT adjust regulation to provide full
rated pressure at the service valve when the IQ System is enabled. This
will result in operation at excessive horsepower levels, causing
overheating, reduced engine life, and reduced airend life.
Keep all doors and panels closed during operation to direct proper flow
of cooling air across the aftercooler and maintain aftercooling
performance.

Low Ambient Operation

When the ambient temperature falls to the point that the aftercooler outlet temperature is
approaching 45°F (7°C), the Temperature Control Unit (TCU), mounted behind the control
panel, will automatically adjust the louvers to control the cooling airflow through the
aftercooler.
There are no user selectable or serviceable components in the TCU. Contact factory service
if any abnormal operation of the freeze protection control system occurs.
CAUTION
!
NOTICE
Operation & Maintenance Manual
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