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42
OPTIONS
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 minimum pressure valve, and
out through the service air valve. The air pressure gauge on the
instrument panel indicates the pressure inside the separator tank. A
service air pressure gauge is located inside the front door of the
compressor on the filter support.
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.
Low Ambient Option Operation
When the ambient temperature falls to the point that the aftercooler
outlet temperature is approaching 45°F, the Temperature Control Unit
(TCU), mounted on the rear of the control panel, will automatically
adjust the louvers to control the cooling airflow through the aftercooler.
In the event that the unit is operating under abnormal conditions
(i.e., an enclosure door open) which would cause excessive cooling of
the aftercooler, a temperature sensor in the aftercooler outlet header
will signal the TCU to further close the louvers if the compressed air
temperature falls to approximately 36° F or lower.
There are no user selectable or serviceable components in the
TCU. Contact Doosan Service if any abnormal operation of the freeze
protection control system occurs.
MAINTENANCE
Daily Maintenance:
Verify, during full-load (maximum compressed air delivery) that the
IQ System filter restriction indicators do not show excessive restriction.
Restriction indicators for the filters are mounted inside the control
panel, and will shut down the compressor if restriction exceeds
recommended values.
Weekly Maintenance:
•
Remove Y-strainer screens at the bottom of the moisture separator
and both filters and clean out any residue.
•
Verify that the orifices below the Y-strainers are not clogged.
•
Verify that the piping from the orifice purge points to the exhaust
system is not clogged.
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
Yearly Maintenance:
The normal maintenance interval on the primary and secondary IQ
System filters is one year, or earlier if pressure drop becomes
excessive. Restriction indicators for the filters are mounted on the filter
support inside the front door, and will shut down the compressor if
restriction exceeds recommended values.
Filter Replacement
•
With engine stopped, ensure pressure is relieved from air system.
•
Remove all wires and hoses connected to drains on bottom of each
filter housing. Inspect fittings and hoses for any blockage. Clean if
necessary.
•
Using a chain wrench or similar tool, loosen the housing. The
housing should be removed by hand after loosening, taking care to
prevent the housing from falling to the floor panel.
•
Lower the housing to floor panel and lean it against the airend.
Remove and replace the filter element, being careful not to damage
outer wrap.
Verify the part number of new element vs. old element, as the two
IQ filters are of different media.
OPTIONS - IQ SYSTEM
SAFETY
CAUTION: The compressor regulation system is adjusted to
maintain regulated pressure at the separator tank. DO NOT adjust
regulation to provide full regulation pressure at the service valve
when the IQ System is enabled. This will result inC operation at
excessive horsepower levels, causing overheating, reduced engine
life, and reduced airend life.
CAUTION: Excessively restricted filter elements may cause an
increase in the amount of aerosol water and oil carryover, which
could result in damage to downstream equipment. Normal service
intervals should not be exceeded.
CAUTION: Blockage of the condensate will result in flooding of the
vessels. If flooding occurs, excessive condensate may enter the air
stream and could result in damage to downstream equipment.
NOTICE:
Do not operate at temperatures less that 2° C (35° F) unless equipped
with low ambient IQ option.
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