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IRN37 - 160K - CC & IRN50 - 200H & IRN75 - 160K - 2S & IRN - 100 - 200H - 2S & IRN 250 - 300H - 2S
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10.0 MAINTENANCE
Note:
On some sea watercooled models the oil cooler and aftercooler are fitted with sacrificial zinc anodes (pencils) that are
located in the end bonnets of the coolers. These sacrificial zinc anodes should be checked after the first 50 hours of
operation to determine if corrosive conditions exist. If satisfactory this interval may be extended to 500 hours.
NOTE:
If sacrificial zinc anode is 50% corroded it should be replaced.
Coastal/harbor waters can contain corrosive chemicals from pollution and may reduce anode/cooler life.
Effects of corrosion or erosion are specifically excluded from warranty considerations.
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10.3 MAINTENANCE PROCEDURES
CAUTION
Before beginning any work on the compressor, read and understand the safety instructions earlier on in this
manual. Open, lock and tag the main electrical disconnect and close the isolation valve on the compressor
discharge. Do not under any circumstances open any drain valve or remove components from the compres-
sor until this has been carried out. Ensure that all pressure has been vented from the compressor. Verify this
by slowly unscrewing the coolant fill cap one turn. Unscrewing the fill cap opens a vent hole, drilled in the
cap, allowing pressure to release to atmosphere. Do not remove the fill cap until all pressure has vented from
the unit. Note that pipework downstream of the separator tank may still contain pressure that must also be
vented to atmosphere before beginning any work.
CAUTION
When using any form of liquid for cleaning, ensure that all electrical components are protected or
covered to prevent ingress of liquid.
WARNING
This compressor contains a variable frequency drive. When it is switched off and the motor is stopped, the
internal capacitors store a potentially lethal high voltage. DO NOT REMOVE THE DRIVE COVER or attempt any
work on the drive unless trained. There are no user serviceable items behind the cover.
DANGER
This compressor contains a variable frequency drive. When it is switched off and the motor is stopped, the
internal capacitors store a potentially lethal high voltage electric charge which gradually falls to zero over
time. After switching off the machine at its local isolator WAIT AT LEAST 15 MINUTES for the capacitors to fully
discharge before opening the power drive module doors.
WARNING
The compressor can operate in a pressurised shutdown mode. If the compressor stops automatically, the
airend, separator tank and oil system can contain high pressure air. This can be relieved by pressing the
emergency stop button and can be verified by unscrewing the coolant fill plug which has a vent hole through
which any residual pressure will be vented. Downstream of the separator tank may still contain system pres-
sure which must also be vented.
WARNING
Use suitable equipment for lifting heavy items and ensure loose components are adequately supported to
eliminate risk of dropping.
WARNING
The motor rotor contains a powerful magnetic field. This field can effect the operation of digital devices such
as watches, mobile phones etc. Assembly or handling of the rotor should not be attempted by personnel with
cardiac pacemakers, defibrillators or other implanted electronic medical device.