10.0 MAINTENANCE
IRN37–160K–CC & IRN50–200H–CC & IRN75–160K–2S & IRN100–200H–2S
72
S
Remove hose from elbow in aftercooler inlet. Plug
elbow in inlet hole of aftercooler.
S
Unscrew the fitting connecting the aftercooler to
the discharge tube.
S
Loosen mounting bolts on moisture separator to
allow moisture separator to slide down in
mounting bracket. Once lowered, remove the
discharge tube connecting the moisture separator
to the aftercooler outlet.
S
Plug aftercooler discharge hole.
S
To tilt cooler forward, remove 6 screws holding the
cooler in place. While removing the last screw,
hold the top of the cooler in place to prevent
the cooler from tilting. Once the screw is
removed, allow the cooler to tilt forward until the
pivot brackets touch the pivot stops. The cooler
will stop tilting at 45 degrees.
S
Cover the main drive motor with plastic sheeting
to prevent cleaning solution from entering the
motor.
S
Before cleaning coolers, check to ensure
aftercooler intake and discharge holes are
plugged to prevent contamination of compressor
system. Clean coolers with a mild cleaning
solution.
WARNING
Strong cleaners can harm aluminium cooler
parts. Follow cleaner manufacturers instructions
for use. Wear appropriate safety equipment.
S
After cleaning is complete, reassemble in reverse
order.
N125/200H (N90/160K) SINGLE STAGE and
N100/200H (N75K–160K) TWO STAGE
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.
S
Remove 4 screws from enclosure panel below
moisture separator and remove panel.
S
Remove 4 screws from enclosure panel above
moisture separator and remove panel.
S
Remove the 16 screws securing the access panels
on the cooling plenum and remove covers.
S
Cover main drive motor, PDM Heat sink blower
motor, drain valve, and cooling motor variable speed
drive with plastic sheeting to prevent damage from
entrance of cleaning solution.
S
Cover inlet of blower wheel with plastic sheeting to
prevent entrance of cleaning fluid.
S
Cover the inlet grill of the intake panel with plastic
sheeting to prevent cleaning solution from exiting
the compressor.
S
Attach drain hose to the coupling on the bottom of
the plenum to allow the cleaning solution to drain
outside the compressor. Alternately, place large
bucket underneath plenum to collect cleaning fluid.
S
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.
If the cooler cores are unable to be clean
while installed in the compressor, remove
cooler as follows:
S
Remove 5 screws from panel below the intake panel
and remove panel. Be careful not to damage the
electrical leads entering the panel.
S
Remove 8 screws from the intake panel and remove
panel.
S
Remove 8 screws from the intake plenum supports
and remove the supports.
S
Remove the 10 screws securing the intake plenum
and remove the plenum
S
Disconnect both oil lines and both air lines from the
cooler. Plug all 4 inlets to prevent cleaning fluid from
entering the cooler cores.
S
Remove 6 screws from top panel above cooler and
remove panel.
S
Using lifting device from above, attach lifting straps
to lifting supports on each side of cooler.
S
With the weight of the cooler supported by the lifting
device, remove the 10 screws securing the cooler
and remove the cooler.
S
Clean coolers with a mild cleaning solution.
WARNING
Strong cleaners can harm aluminium cooler
parts. Follow cleaner manufacturers instructions
for use. Wear appropriate safety equipment.
S
After cleaning is complete, reassemble in reverse
order.