10.0 MAINTENANCE
IRN37–160K–CC & IRN50–200H–CC & IRN75–160K–2S & IRN100–200H–2S
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CAUTION
Do not use any form of sealant on either the
separator tank or the separator tank cover faces.
Separator tank / Pressure system
At 2000 hour intervals, inspect the external surfaces
of the airend and separator tank, including all fittings,
for visible signs of impact damage, excessive
corrosion and abrasions. When changing the
separator element inspect the internal components
and surfaces. Any suspect parts should be replaced
before the compressor is put back into service.
The separator tank should also be tested and
inspected in accordance with any national or local
codes that may exist.
Coolant hoses
S
The flexible hoses that carry coolant through the
cooling system may become brittle with age and
will require replacement. Have your local
Ingersoll–Rand Distributor or Air Center inspect
them every 3 months and replace them as needed
or every 2 years.
S
Depending on the location of the hose, it may
contain compressor coolant. It is recommended to
drain the coolant into a clean container. Cover the
container to prevent contamination. If the coolant
is contaminated, a new charge of coolant must be
used.
S
Remove the hose.
S
Install the new hose and refill the unit with coolant.
Start the compressor, check for leaks and check
coolant level. Refill as necessary
Pressure relief valve check
The pressure relief valve must be frequently tested
and regularly maintained. Remove from the machine
and check for the correct operating pressure. Adjust
as necessary. If operating conditions are particularly
severe, the frequency of testing and maintenance
must be increased accordingly. A pressure relief
valve check must also be performed at the end of
any non–service period. The user must establish the
frequency of such tests as it is influenced by such
factors as the severity of the operating environment.
CAUTION
High pressure air will discharge through the
discharge ports of the valve during pressure
relief valve check. Wear ample clothing, gloves,
safety glasses and ear protection during valve
testing.
Run the compressor for about 10 minutes by venting
air from the system to let the unit warm up. With the
unit running, test at or near the maximum operating
pressure by opening the valve for the minimum
period required to flush the valve seat free of debris.
This can be accomplished by holding the test lever
fully open or unscrewing the spring pressure retaining
cap, depending on the type of valve installed. If there
is no evidence of discharge or the valve does not fully
close, discontinue use of equipment and contact a
licensed contractor or qualified service personnel.
The pressure relief valve should also be tested and
re–calibrated in accordance with any national or local
codes that may exist.
If no code exists, IR
recommend that the pressure relief valve is
recalibrated at intervals of one year.
Air filter change procedure
S
Unclip the retaining cap and withdraw the old
element.
S
Fit the new element and refit the retaining cap.
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.
N50/100H (N37/75K)
Following are instructions for tilting the cooler away
from the enclosure and cleaning of the cooler.
S
Remove 6 screws from lower rear fixed panel and
remove panel.
S
Remove 10 screws from the rear intake panel and
remove panel.
S
Loosen clamp and disconnect the air inlet hose
from the intake plenum.
S
Remove intake plenum. Note, plenum is
unsupported, before removing the 8 screws
from the intake plenum, block underside of
plenum prior to removing screws to prevent
plenum from falling.