Ingersoll-Rand 2475N7.5-P Owner's Manual

Ingers011Rand Owner's Manual
Installation, Operation and Maintenance Instructions
for Standard Two-Stage Lubricated Air Compressors
(Electric Motor and Gasoline Engine Models Up to 30 Horsepower)
IMPORTANT INFORMATION! READ AND FOLLOW THESE INSTRUCTIONS. RETAIN FOR REFERENCE.
_.'f.'!=1 _/b'd
DEFINITIONS
A__ WILL cause DEATH, SEVERE INJURY or substantial
property damage.
/k WARNING CAN cause DEATH, SEVERE INJURY or substantial
property damage.
/_ CAUTION WILL or CAN cause MINOR INJURY or property
damage.
GENERAL SAFETY PRECAUTIONS
A__'_ INTAKE AIR. Can contain carbon monoxide or other
contaminants. Will cause serious injury or death.
Ingersoll-Rand air compressors are not designed,
intended or approved for breathing air. Compressed
air should not be used for breathing air applications
unless treated in accordance with all applicable
codes and regulations.
/_ WARNING HAZARDOUS VOLTAGE. Can cause serious injury
or death. Disconnect power and bleed pressure
from the tank before servicing. Lockout/Tagout
machine. Compressor must be connected to
properly grounded circuit. See grounding
instructions in manual. Do not operate compressor
in wet conditions. Store indoors.
/k CAUTION
MOVING PARTS. Can cause serious injury. Do not
operate with guards removed. Machine may start
automatically. Disconnect power before servicing.
LockoutJTagout machine.
HOT SURFACES. Can cause serious injury. Do not
touch. Allow to cool before servicing. Do not touch
hot compressor or tubing.
HIGH PRESSURE AIR. Bypassing, modifying or
removing safety/relief valves can cause serious
injury or death. Do not bypass, modify or remove
safety/relief valves. Do not direct air stream at body.
Rusted tanks can cause explosion and severe injury
or death. Drain tank daily or after each use. Drain
valve located at bottom of tank.
RISK OF BURSTING. Use only suitable air handling
parts acceptable for pressure of not less than the
maximum allowable working pressure of the
machine.
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INTRODUCTION
This manual provides safe and reliable instructions for the
installation, operation and maintenance of your Ingersoll-Rand air
compressor. Carefully read this manual before attempting to
operate or perform any maintenance. If you are uncertain about any
of the instructions or procedures provided in this manual, contact
Ingersoll-Rand. We recommend you retain this manual, and all
publications provided with your air compressor, in a location which
is accessible to all personnel who operate and service your
compressed air equipment.
APPLICATION
IngersolI-Rand's standard two-stage lubricated air compressors are
single-acting, air-cooled machines. Typical compressors are
furnished as compact, self-contained, air receiver tank mounted
units that are automatically regulated and driven by an electric
motor or gasoline engine. An air-cooled aftercooler, low oil level
shutdown switch and automatic drain valve are among the optional
accessories that can be furnished. Bare compressor pumps and
baseplate-mounted units are also available.
These compressors may be used for a variety of compressed air
application up to 250 PSIG (17.5 kg/cm2). Application of these
compressors as either a primary or supplementary source of air is
virtually unlimited in industrial plants, service stations and auto
repair shops. Supplementary service includes such uses as
furnishing air at pressure not carried in regular shop lines, air at
isolated locations, and standby service for air when larger
compressors are shut down.
TWO-STAGE OPERATION
Two-stage compressors consist of one or two first-stage cylinders
with the same bore size and one second-stage cylinder with a
smaller bore size.
Typical Two-Stage, Two
Cylinder Unit
Typical Two-Stage, Three
Cylinder Unit
The basic principle of operation is as follows: On the suction stroke
of the first-stage piston(s), air at atmospheric pressure enters the
cylinders through the inlet filter(s) and then the inlet valves located
in the head. On the compression stroke of the first-stage piston(s),
the air is compressed to an intermediate pressure and discharged
through the discharge valves(s) into common manifold(s). From the
manifold(s) the air passes through the intercooler tubes, where the
heat of first-stage compression is removed. On the suction stroke of
the second-stage piston this cooled air enters the second-stage
cylinder through the inlet valve. The compression stroke of the
second-stage piston compresses the air to the final discharge
pressure and forces it out through the discharge valve into the
receiver tank or system. If cooling of the discharge air is required,
© Ingersoll-Rand Company
Printed in U.S.A.
Form SCD-838A
August 2001