10.0 MAINTENANCE
IRN37–160K–OF & IRN50–200H–OF
http://air.irco.com
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Air filter change procedure
Unclip (or unbolt) the retaining cover and remove the
old element(s).
Fit new element(s) and refit the retaining cover.
Aircooled Cooler Cleaning
Ensure that the compressor is isolated from the
compressed air system and is vented of all pressure.
When undertaking any work on the compressor always
use certified lifting equipment and employ sound
working principles.
Ensure that the main power disconnect switch is locked
off and tagged.
Visually check the outside of the cooler cores to be
certain that a complete cleaning of the cooler is
required. Frequently, dirt, dust or other foreign material
may only need to be removed with a vacuum to remedy
the problem.
When the cooler is covered with a combination of oil,
grease or other heavy substances that may affect the
unit’s cooling, then it is recommended that the cooler
cores be thoroughly cleaned on the outside.
If it is determined that the compressor operating
temperature is higher than normal due to the external
passages between the fins of the cooler cores being
restricted with deposits of foreign material, then the
cooler should be removed for cleaning.
WARNING
Strong cleaners can harm aluminium cooler parts.
Follow cleaner manufacturers instructions for use.
Wear appropriate safety equipment.
The coolers in these machines can either be cleaned by
removing the complete cooler for off site cleaning or
’back flushing’ in place using a high pressure hose and
gaining access through the holes in the intermediate
plenum.
Instructions for cleaning the coolers while
installed in the compressor.
While cleaning coolers, great care must be taken to
protect the rest of the machine from moisture and
contamination by covering sensitive parts with plastic
sheeting.
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Remove plenum sheet metal to gain access to the
coolers from the blower side.
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Remove the screws securing the access panels on
the cooling plenum and remove covers.
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Cover main drive motor, PDM Heat sink blower
motor, drain valve, air filter, and cooling motor
variable speed drive with plastic sheeting to prevent
damage from entrance of cleaning solution.
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Cover inlet of blower wheel with plastic sheeting to
prevent entrance of cleaning fluid.
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Cover the inlet grill of the intake panel with plastic
sheeting to prevent cleaning solution from exiting
the compressor.
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Remove enclosure intake batts
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Use an extended length nozzle and a mild cleaning
solution to clean the coolers.
WARNING
Strong cleaners can harm aluminium cooler parts.
Follow cleaner manufacturers instructions for use.
Wear appropriate safety equipment.
S
Cleaning fluid will collect on both sides of the cooler
core. If required, periodically drain fluid from intake
plenum and bucket to prevent them from over
flowing.
S
After cleaning is complete, dry off plenum, intake,
and cooler core. Reassemble parts in reverse order.
Watercooled Cooler Cleaning
A periodic inspection and maintenance program should
be implemented for watercooled heat exchangers. The
following steps should be taken:
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Inspect filters in system and replace or clean as
required.
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Carefully examine cooler shells for scale and clean
if necessary. If a cleaning solution is used, be sure
to wash out all chemicals thoroughly with clean
water before returning the compressor to service.
After cleaning, examine the cooler for erosion or
corrosion.
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A qualified cleaning service should be used for the
cleaning process. These organizations can
evaluate the type of deposit to be removed and
supply the appropriate solution and method for a
complete cleaning job.
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When reinstalling bonnets to cooler shell, tighten
bolts uniformly in a cross–pattern. Overtightening
can result in cracking of the bonnet.
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Cleaning solutions must be compatible with the
metallurgy of the cooler
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Care must be taken to avoid damaging tubes if
mechanical cleaning procedures are used.
Airend bearings
Airend bearings are lubricated by the compressor oil
and require no maintenance.
CAUTION
Under no circumstances should these discharge
temperatures be exceeded. If the machine fails to
trip A FAULT EXISTS. Investigate immediately.
Blower Motor Bearing Maintenance (Stored units)
S
Prior to placing a unit in storage for extended
intervals, rotate the blower motor several
revolutions by hand in the direction of rotation.
