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42915.12.22
Inspecting Separator Tank / Pressure System
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 shall 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.
Cleaning / Checking Scavenge Screen
The screen/orifice assemblies are similar in appearance to a straight tubing
connector and will be located between two pieces of 6 mm (0.25 in) O.D.
scavenge line tubing.
The main body is made from 17 mm hexagon shaped metal and the diameter
of the orifice and a direction-of-flow arrow is stamped in flat areas of the
hexagon.
A removable screen and orifice will require clearing as outlined in the
maintenance chart.
To remove the screen/orifice:
1.
Disconnect the scavenge line tubing from each end.
2.
Hold the center section firmly and use a pair of pliers to gently
grasp the exit end of the assembly that seals against the scavenge
line tubing. The exit end is the end toward which the arrow is
pointing.
3.
Pull the end out of the center section while using care to prevent
damage to the screen or sealing surfaces.
4.
Clean and inspect all parts prior to reinstallation.
5.
When the assembly is installed, confirm the direction of flow to
be correct. Observe the small arrow stamped in the center section
and ensure the direction flow to be from the separator tank to the
airend.
Replacing Coolant Hoses
The flexible hoses that carry coolant through the cooling system may
become brittle with age and will require replacement. Replace them as
needed or every four years.
1.
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, replace with new coolant.
2.
Remove the hose.
3.
Install the new hose and refill the compressor with coolant.
4.
Start the compressor, check for leaks and check coolant level. Refill
as necessary.
Checking Minimum Pressure Check Valve (MPCV)
The minimum pressure check valve (MPCV) shall be frequently tested and
regularly maintained. Remove it from the compressor for testing. If operating
conditions are particularly severe, the frequency of testing and maintenance
shall be increased accordingly. The user shall establish the frequency of
such tests as it is influenced by such factors as the severity of the operating
environment. For R30-37, the MPCV is installed as part of combination block.
The minimum pressure check valve (MPCV) should be tested and re-
calibrated in accordance with any national or local codes that may exist. If
no code exists, Ingersoll Rand recommends that the valve is recalibrated at
intervals of one year by a licensed contractor or qualified service personnel.
Changing Air Filter
1.
Check the retaining cap for dirt and debris and wipe clean.
2.
Unclip the retaining cap and withdraw the old element.
3.
Fit the new element and refit the retaining cap.
80447212 Rev D
Regreasing Motor
The blower motor contains pre-greased, sealed bearings. They cannot be
re-greased and do not require re-greasing. For the main motor, consult the
motor manufacturer to confirm that the motor may be greased and to obtain
instructions for regreasing.
Cleaning Air Cooled Cooling System
Air compressor operating temperatures will be higher than normal if the
external passages between the fins of the cooler cores become restricted
with foreign material. Regular cleaning of the cooler surfaces will support
the reliable operation of the air compressor system, improve the life of
the compressor coolant and improve overall compressor efficiency. When
performed frequently as determined by site conditions and airborne
contamination, more significant cleaning or replacement may not be
necessary.
1.
Stop the compressor.
2.
Isolate the compressor from the system.
3.
Press the emergency stop to vent the separator tank and airend.
Fixed speed compressors can take more than two minutes to fully
de-pressurize once stopped.
4.
Ensure that the main power disconnect switch is locked off and
tagged.
For any required lifting of air compressor parts or required tools,
always use the proper certified lifting equipment, and employ sound
working principles .
5.
Visually check the outside of the cooler cores to determine the
appropriate cleaning method detailed as follows:
a.
For loose dirt, dust and other light foreign material, open the access
panel on the cooler plenum. For R30-37, gently blow compressed
air across the cooler surface. For R37e-160, gently blow compressed
air across the coolant cooler surface, then use a vacuum hose with
a soft brush to clean the exposed face of the air aftercooler. Repeat
the process until the coolers are sufficiently clean. Replace the
access panels before returning the compressor to service.
b. For thick, packed dirt, coolant or grease, or other heavy material,
the coolers will need to be removed from the compressor for
pressure washing. Ingersoll Rand does NOT support pressure
washing coolers when they are installed in the compressor due
to the dangers of spraying water in or around potential electrical
power sources. Follow the steps below for cooler removal.
Removing / Installing Air Cooled Cooler (combination cooler
for R30-37)
To remove:
1.
Stop the compressor.
2.
Isolate the compressor from the system.
3.
Press the emergency stop to vent the separator tank and airend.
Fixed speed compressors can take more than two minutes to fully
de-pressurize once stopped.
4.
Ensure that the main power disconnect switch is locked off and
tagged.
5.
Drain the coolant from the coolant cooler by removing the hex plug
located at the lower side of the coolant cooler.
6.
Remove all hoses, pipes, and sensors from the coolers.
7.
Remove the external sheet metal panels.
8.
Properly secure the coolant cooler and remove the six nuts from the
three bolts at the upper side of the cooler.
9.
Remove the nuts from the bolts at the bottom of the cooler.
10. Re-install the coolant drain plug to 65 N m (48 ft lb).
NOTICE
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