SECTION 3
–
INSTALLATION INSTRUCTIONS
System Description – General
The Ingersoll-Rand compressor modules are semi-
packaged, air-cooled units designed for power take- off
applications. Each unit is designed to operate at ambient
temperatures from -10°F to 125°F (-23.3°C to 51.7°C). For
the actual delivery of each unit at its rated operating
pressure, refer to the General Data Decal supplied with
each unit.
The unit includes an oil-flooded, rotary, screw-type air
compressor, a compressor inlet system, a capacity control
system, a compressor lubricating oil system, a compressor
discharge system as well as basic instrumentation. The
compressor inlet system includes an air intake cleaner
with a service indicator. The capacity control system in-
cludes a pressure regulator linked to compressor inlet
unloader valve. The compressor lubricating oil system
includes an air-cooled type oil cooler, an oil filter, and oil
control valve and an oil separator tank and air receiver.
The oil cooler is of the fin and tube-type construction that
requires forced draft cooling air.
Basic instrumentation includes compressor discharge air
pressure and temperature gauges, hour meter, and air
restriction indicator.
The enclosure cabinet, in which the components are
mounted, is of heavy gauge sheet steel and is equipped
with easy opening access panels for performing routine
maintenance functions.
Compression in the screw-type air compressor is created
by the meshing of two helical rotors (male and female) on
parallel shafts enclosed in a heavy-duty cast iron housing
with air inlet and outlet ports located at opposite ends. The
male rotor has four lobes, 90 degrees apart and the
female rotor has six grooves 60 degrees apart. The
grooves of the female rotor mesh with and are driven by
the male rotor.
Thrust taper roller bearings at the rear of the airend
prevent longitudinal movement of the rotors. As rotation of
the compressor occurs, the rotors unmesh and free air is
drawn into the cavities or pockets between the male rotor
lobes and the grooves of the female rotor.
The air is trapped in these pockets and follows the
direction of rotation of each rotor. As soon as the inlet port
is closed, the compression cycle begins and the trapped
air is directed to the opposite or discharge side of the rotor
housing.
As the rotors mesh, the normal free volume of air is de-
creased and the pressure increased until the closing
pocket reaches the discharge port. Cooled lubricating oil is
admitted to the compressor by being injected, in metered
amounts, directly into the rotor housing so that it passes
on with the air being compressed. This removes the heat
of compression to a large degree and results in a relatively
low, final discharge air temperature.
Since the Ingersoll-Rand Compressor Module Series unit
is of the positive displacement type, an airflow control
system must be provided to regulate the volume of air
passing through the compressor to match the amount of
service air required by the customer.
Constant speed control unloads the compressor at a
predetermined pressure while the driving unit continues to
operate at full speed. An air operated regulator closing off
the intake to the compressor in an infinitely variable or
stepless manner through the inlet unloader valve accomp-
lishes this.
The discharge air pressure can be controlled between 80
and 175 psig (552 to 1206 kPa) by simple readjustment of
the speed and pressure regulator adjusting screw. Unit is
shipped set at 100 psig (804 kPa).
Mounting Unit
Satisfactory installation depends upon the ability of the
installer. Refer to the appropriate foundation plan for the
dimensions of the compressor package.
Choose a clean, relatively cool location for the compressor
package, and provide ample space around the unit for
general accessibility and to ensure effective heat
dissipation. Extreme care must be taken in locating an air-
cooled unit of this type so there is an unrestricted supply
of air to the cooling fan, which pulls air over the oil cooler
core. The fan discharge air must flow away from the unit
so that it may be readily dissipated to atmosphere without
recirculating hot air to the fan intake. Any recirculation of
the cooling air may result in an excessively high
compressor operating temperature. The compressor pack-
age must be located so the instrument panel will be fully
visible.
NOTE: Instruments and control switch may be moved to
opposite side of unit by customer or his agent, if desired.
To move, switch the instruments and switch with hole
plugs on opposite side. Duplicate panel decal is already
installed.
The package has openings for cooling air intake on the
rear and one end. While it is desirable that all five surfaces
be open to admit air, the design of the product recognizes
the practicality of various mounting arrangements. Excess
cooling opening sand cooling capacity of the fan and
cooler combination has therefore been provided. The
package will cool to at least the specified ambient limits if
the rear OR the open end is totally blocked by walls,
equipment, etc. It is NOT permissible to block the front of
the unit, where the fan flow exits.
Exact level is not absolutely necessary, but it is recom-
mended the unit be leveled with a sight glass or a car-
penter’s level set on the compressor housing. Leveling
may be accomplished by shimming the unit near the unit’s
bolting holes. Be sure to use steel shims. Mounting holes
are provided on the bottom of the base.
Sufficient space must be provided at the top of the unit to
service the air cleaner, oil filter, and separator element.
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Manual P/N 22189203 (01/17/2005)
Summary of Contents for HP60CMH
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Page 44: ...22173538 44 Manual P N 22189203 01 17 2005 ...
Page 45: ...UNLOADER ASSEMBLY 45 Manual P N 22189203 01 17 2005 ...
Page 46: ...Separator Tank 46 Manual P N 22189203 01 17 2005 ...
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Page 49: ...AIR OIL HYDRAULIC PIPING 49 Manual P N 22189203 01 17 2005 ...
Page 50: ...AIR OIL HYDRAULIC PIPING 50 Manual P N 22189203 01 17 2005 ...
Page 52: ... 52 Manual P N 22189203 01 17 2005 Wiring Diagram ...