10.0 MAINTENANCE
IRN37–160K–CC & IRN50–200H–CC & IRN75–160K–2S & IRN100–200H–2S
70
Coolant change procedure
WARNING
The coolant filter and coolant may be hot!
The compressor features a ’no drip’ coolant drain
feature which requires no special tools and minimizes
the risk of coolant spillage.
It is better to drain the coolant immediately after the
compressor has been operating as the liquid will
drain faster and any contaminant will still be in
suspension.
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Remove the cap from the drain valve located at
the front of the separator vessel.
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Place a suitable container close to the drain valve.
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Screw the coolant drain hose onto the drain valve.
As the threads engage, the valve will automatically
open and the coolant will drain.
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Remove the drain hose. The valve will
automatically close and seal.
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Replace the cap on the drain valve.
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For a complete drain, remove the plug near the
vessel inlet flange and replace when complete.
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Replace the coolant filter element.
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Refill with correct quantity of coolant. See 8.0
General Information.
CAUTION
Do not mix coolant types. Use only coolant
specified by IR
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Start the compressor and check for leaks.
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Check the coolant level, refilling if necessary.
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Dispose of waste coolant in accordance with local
and governmental regulations.
NOTICE
Shorter coolant drain intervals may be necessary if
the compressor is operated in adverse conditions.
Food Grade Coolant option
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SSR Food Grade Coolant is a polyalphaolefin base
coolant. Change after 1000 hours or every 6 months
whichever comes first. Do not operate unit past this
1000 hour change interval, as coolant degradation
will occur.
Coolant filter change procedure
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Loosen filter element with the correct tool.
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Remove the element from the housing.
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Place the old element in a sealed bag and dispose
of in a safe way.
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Clean the mating face of the housing.
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Remove the new Ingersoll–Rand replacement
element from its protective package.
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Apply a small amount of coolant to the element
seal.
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Screw the new element down until the seal makes
contact with the housing, then hand tighten a
further half turn.
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Start the compressor and check for leaks and
check the coolant level.
Separator element checking procedure
With the compressor running on load, check the
separator differential pressure via the Intellisys
controller. It will be necessary to change the element
if the differential pressure equals zero or exceeds 1
bar (12 psig).
Separator element change procedure
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Remove all the capscrews securing the cover to
the tank except the screw opposite the pivot bolt
which should be left engaged by 2–3 threads with
at least 6.5mm (0.25”) clearance from the screw
head to the lid. Rotate the jacking bolt clockwise
until the cover lifts off the tank at least 2mm (0.08”)
all the way around the tank. The cover can now be
rotated to allow access to inside the tank.
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Carefully lift out the element spacer and retain for
reassembly. Do not damage the flat surfaces of
the spacer as this may cause higher oil carryover
or leaks. A hoist is available for 175HP (90kW)
machines and above if required.
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Carefully withdraw the used element, place it in a
sealed bag and dispose of it safely.
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Remove the O–rings from the top of the tank, the
separator element sealing face and the scavenge
tube sealing face.
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Clean the surfaces on both the tank and the cover.
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Install new O–rings
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Install the replacement element.
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Re–fit the separator element spacer.
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Rotate the tank cover back into position taking
care not to damage the O–ring, and locate the
cover using 2 capscrews but do not tighten down.
WARNING
Unscrew the jacking bolt sufficiently to ensure
that the cover can be fully tightened down
without imparting any stress onto the jacking
points. Tighten down the cover setscrews.
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Start the compressor and check for leaks and
coolant level.
