OPERATING AND MAINTENANCE INSTRUCTIONS
CLIMATE CONTROL/INDUSTRIAL
“PERFORMANCE UNDER PRESSURE”
2362 Emerson Street ● Jacksonville, Florida 32207 ● (800) 394-5575 ● (904) 396-5575
A Message from the President
Air Compressor Products, Inc. (ACP) was established in 1973 to manufacture
compressed air systems and related products. We have over forty years experience in the
compressed air industry arid our total quality commitment and on-going development
provide the background for our technically advanced products.
We know that a company’s greatest asset is its ability to provide genuine service to its
customers. Our mission is to continually improve our products and services in order to
meet our customer’s needs. This has established Air Compressor Products as an
innovative industry leader in the manufacture, development and application of products
for compressed air systems.
Our products are built for value, safety and long lasting performance. Our modern
manufacturing facilities have the flexibility to meet the market needs for both standard
and special compressor packages. ACP breathing air and climate control products are
recognized worldwide. Our goal is to provide you with products and service second to
none.
Sincerely,
Air Compressor Products, Inc.
Greg Walski
CEO
FAILURE TO READ THIS MANUAL BEFORE INSTALLING AND
OPERATING YOUR NEW AIR COMPRESSOR COULD RESULT IN
INJURY, PROPERTY DAMAGE, AND/OR EQUIPMENT FAILURE.
FREIGHT DAMAGE
Freight damages do not constitute warranty service. ACP terms are FOB point of
shipment (plant), and ACP’s responsibility ceases upon delivery of product to carrier and
obtaining receipt for same. It Is the responsibility of the receiving customer to file
damage or concealed damage claim with the delivering carrier upon receipt or product.
1
PAGE
1
4
7
INDEX
LETTER FROM ACP PRESIDENT
SAFETY WARNING
FREIGHT DAMAGE
PREPARING TO START
STARTING
BELT TENSION ADJUSTMENT
PERIODIC MAINTENANCE CHART
2
2 INDEX
3 INSTALLATION
5 STOPPINGFORMAINTENANCE
LUBRICATION
8 TROUBLESHOOTINGCHART
12 LONGTERMSTORAGE
13 TORQUESPECIFICATIONS
INSTALLATION
LOCATION
Locate the compressor in a dry, clean, cool and well ventilated area. If the compressor
must be mounted in areas which are poorly ventilated or have dirt, vapors or volatile
fumes in the atmosphere, install a remote air intake system. These conditions may cause
faulty operation due to clogged intake filters and valves or they can cause moisture to
accumulate in the systems air lines.
NOTE:
The compressor must not be installed closer than twelve (12) inches to a wall or to
another compressor to allow ample circulation of air across the compressor cylinders and
heads. Additional safety can be achieved by locating the pulley system, with the guard,
on the wall side.
Mounting - Mount the compressor on a concrete pad or floor making certain that the
receiver feet are level and that no stress is induced in the legs when the mounting nuts ate
tightened, shim feet if necessary. Severe vibrations will result when feet are uneven and
drawn tightly to the pad which can lead to welds cracking or fatigue of the receiver.
Induction System - Avoid locating the air inlet system where it could ingest toxic,
volatile or corrosive vapors, air temperatures exceeding 120°F, water or extremely dirty
air. Ingesting any of the above noted atmospheres by the compressor will impair the
performance of the equipment.
3
Maximum ambient temperature in which the compressor
and motor should be operated is 104°F.
PREPARING TO START
FAILURE TO MAKE THESE RECOMMENDED CHECKS COULD RESULT IN
SERIOUS INJURY, PROPERTY DAMAGE, AND MECHANICAL FAILURE.
1. Remove all loose pieces and tools around the compressor installation.
2. Check oil level in crankcase.
3. Check motor and compressor pulley for alignment and tightness on shaft
4. Be absolutely certain that all mounting bolts are tight.
5. Manually rotate compressor through enough revolutions to be certain there are no
mechanical interferences.
6. Check belt tension, it should be neither too loose nor too tight.
7. Check all pressure connections for tightness.
8. Check to make sure all safety relief valves are in place.
9. Check to be sure all guards are in place and securely mounted.
10. Check fuses, circuit breakers and thermal overloads for proper size.
11. Open all manual shutoff valves (block valves) at and beyond the compressor discharge.
12. After all of the above conditions have been satisfied, jog the starter switch button to
check the rotational direction of the compressor, it should agree with the rotation arrow
on the unit.
Follow this procedure for start up of a new installation, after changes to an existing installation
have been made, and after service or repairs have been performed.
1. Instructions in addition to those contained within this manual, supplied by manufacturer
of support equipment, must also be read and understood before start-up.
2. Jog starter button and check compressor rotation.
3. Start compressor and watch for excessive vibration and noises. If either is present, stop
compressor and correct.
4. Check air receiver pressure.
5. Manually blow safety relief valve(s).
6. Check operation of controls.
7. Observe general compressor operation closely for first hour and then frequently for next
seven hours. If any abnormal conditions exist, stop compressor and correct the problem.
8. After two days of operation, check belt tension, air and oil piping for leaks and crankcase
oil level.
4
STARTING
DUPLEX UNITS:
NOTE: It is strongly recommended when starting duplex units both compressors be put on line in
the alternating mode. When running only one unit for a long period of time there is a tendency
due to heat generated by the operating compressor for the stand-by compressor to condense
moisture in the head causing fist. When both units are operating equal heat keeps the moisture
STOPPING FOR MAINTENANCE
NEVER ASSUME THE COMPRESSOR IS READY FOR MAINTENANCE OR
SERVICE BECAUSE IT IS STOPPED. THE AUTOMATIC STOP-START
CONTROL MAY START THE COMPRESSOR AT ANY TIME. I
The following procedures should be followed to maximize safety when preparing for
maintenance or service.
1. Disconnect and lock-out the main power switch and hang a sign at the switch informing
of the unit being serviced.
2. Close shut-off valve (block valve) between receiver and compressor, or receiver and
plant air system, to prevent any back-up of air flow into the area to be serviced.
3. Lock open manual vent valve and wait for the pressure in the area to be serviced
(compressor, receiver, etc.) to be completely relieved before starting service. The manual
vent valve may be the drain valve in the receiver. NEVER remove a plug to relieve the
pressure.
4. Shut off water and depressurize system if it is water cooled.
5. Open all manual drain valves within the area to be serviced.
CAUTION: When maintenance has been completed, refer to the
starting procedure section of this manual for restarting the unit.
MAINTENANCE AND SERVICE LUBRICATION
In order to insure proper lubrication the compressor must not be run at a speed lower than 400
RPM or faster than the maximum as stipulated so as to avoid rapid wear of the parts.
Always keep oil level In between the H and L lines or the oil gauge (as shown).
Standard Oil Level
Oil Gauge
Do not over fill. The oil level must be maintained as noted above. Never allow oil to fall below
“L” Level.
Change oil after first 100 hours of operation and every 1000 hours thereafter, (every 500 hours
when the condition of the oil dictates more frequent changes).
Fill crankcase only when compress is shut down.
5
The lubricant should be a premium quality. NON DETERGENT OIL, containing a rust
and oxidation inhibitor. Utilization of an improper oil may result in coking which on
build-up may plug heat exchangers, control lines, compressor valves and safety relief
valves, resulting in a fire or explosion. For proper viscosity refer to the table below.
AMBIENT TEMPERATURE AT
POINT OF INSTALLATION
NOTE:
COMPRESSOR OIL CAPACITY
New ACP Part# Old ACP Part # Old CC Part # New CC Part # Oil Capacity
SINGLE STAGE
ACP-GS11
ACP-GS13
ACP-0S23
ACP-GS33
ACP-G12
ACP-G23
ACP-G43
ACP-GB1
6
0°F. TO 32°F.
32°F. TO 80°F.
ABOVE 80°F.
ACP-GS02
ACP-GS12
ACP-GS22
ACP-GS33 ACP-GSA-7510 C6SA
ACP-GS43
ACP-G13
ACP-G33
ACP-G54 ACP-GH-2025C N/A
ACP-GB2
All reciprocating compressors have a tendency to pass higher than normal
amounts of oil out the discharge port when new. This is because the piston
rings need to conform to the cylinder walls. Allow 100 hours running time
at full discharge operating pressure for piston ring break-in. Do not use a
highe
r viscosity oil than is specified in the table above.
ACP-GS-0
ACP-GSA-0
ACP-GSA-1
ACP-GS-l2
ACP-GS-35
ACP-GSA-35
ACP-GS-75l0
ACP-GS-15
ACP-G-1
ACP-GA-l23
ACP-G-35
ACP-G-7510
ACP-G-15
ACP-GB1
ACP-GB2
SAE VISCOSITY ISO VISCOSITY GRADE
SAE l0W
SAE 20W
SAE 30
C0S
C0S A
C1S
C2S
C3S
CSS
C6SA
C7S
TWO STAGE
N/A
C2T
N/A
N/A
N/A
N/A
N/A
C0S
N/A
C1S
C2S
C3S
C4S
C5SB
C6S
C7S
N/A
C2T
C4T
N/A
N/A
N/A
N/A
N/A
ISO 32
ISO 46/68
ISO 100
12 oz.
21.4 oz.
21.4 oz.
37.2 oz.
32.9 oz.
57.1 oz
85.5oz.
85.5 oz.
152.6 oz.
21.4 oz.
37.2 oz.
57.1 oz
85.5 oz.
152.6 oz.
202.3oz.
BELT TENSION ADJUSTMENT
To change tension, loosen the motor hold-down bolts
and slide the motor on the base, using a lever if
necessary, or by turning the adjusting bolt at the end of
the base.
Retighten motor hold-down bolts.
NOTE: Do not over tighten belts.
PERIODIC MAINTENANCE CHART
CHECK
1. Check Low oil level. Maintain between
High and level masks on gauge.
CAUTION: Do not overfill!
X
3. Drain drop legs and u in air distribution
system.
X
5. Check for any unusual noise or vibration.
7. Operate the safety valves to be certain
they are functioning.
X
9. Replace more or clean air intake filter.
Check more often if dirty conditions exist.
X
11. 11. Inspect oil for contamination and
change if necessary. Check more often
under dirty conditions.
13. Check pulley and pulley clamp screws or
set screws for tightness.
15. Inspect pressure switch diaphragm and
contacts. Also contact points in motor
starter (if supplied).
7
2. Drain moisture accumulation from the air
receiver.
4. Give compressor an overall visual
inspection and be sure safety guards are in
place.
6.
Check for oil leaks.
8. Clean the cooling surfaces of the
intercooler, aftercooler and compressor.
10. Check the air distribution system for air
leaks.
12.
Check belt tension.
14. Inspect compressor valves.
Daily Weekly Monthly
X
X
X
X
X
X
X
X
X
Semi-
Annually
X
Annually
X
Trouble
Low discharge pressure
and air delivery.
Water in the crankcase
TROUBLE SHOOTING
Probable Cause
Restricted air inlet filter or suction line.
Bad compressor valves or valve unloading mechanism.
Leaks in the plant air system at fittings, connections, tools, etc.
Unloader pilot set wrong or bad.
Pressure switch set wrong or bad.
Drive belt slipping.
Incorrect speed.
Worn piston rings or loose piston.
Leaking head gasket.
Drain valve open.
Bad pressure gauge.
Demand exceeds capacity, compressor not sized properly.
Safety valve leaking.
Loose compressor valves or leaking at valve gaskets.
Valves or piston rings not seated.
Compressor does not run long enough to get hot and vaporize the
moisture squeezed out of the air during compression.
Compressor may be too large for the application.
Leaking cylinder head.
Detergent oil being used.
System pressure leaking back through valve.
8
Trouble
Rusty valves and/or
cylinders.
Excessive belt wear.
Excessive vibration.
Compressor loads and
unloads excessively.
TROUBLE SHOOTING (Continued)
Compressor operated too infrequently.
Compressor does not run enough to get hot and vaporize the moisture
squeezed out of the air during compression.
Not properly processed for storage.
Pulleys out of alignment.
Belt too loose or too tight.
Belt slipping.
Pulley wobbling.
Pulley groove damaged or rough.
Incorrect speed.
Compressor valves not functioning properly.
Pulley loose.
Motor or engine out of balance.
Compressor, motor or engine not secured tightly, or tightened in a
bind.
Excessive discharge pressure.
Air storage capacity too small.
Compressor valves or unloaders bad.
Excessive system leakage.
Incorrect speed.
Unloader pilot differential set too close.
9
Probable Cause
Trouble
Air receiver pressure
excessive.
Compressor overheats.
Compressor knocks.
High air discharge
temperature
TROUBLE SHOOTING (Continued)
Air pressure gauge inaccurate.
Leaks in unloader piping system.
Compressor valve unloader bad.
Unloader pilot or pressure switch set improperly, or bad.
Defective compressor valves.
Pressure setting too high.
Clogged Intercooler, internally or externally.
Inadequate ventilation or recirculation of hot air.
Pulley rotation wrong.
Incorrect speed.
Running clearances insufficient, piston to cylinder wall or running
gear.
Lubrication inadequate.
Head clearance insufficient.
Piston loose in cylinder bore, cylinder bore worn, piston or piston
rings worn.
Worn connecting rod bearings.
Worn main bearings.
Excessive crankshaft end play.
Pulley loose.
Compressor valve assemblies loose.
Compressor valve assemblies bad.
Air discharge pressure too high.
Inadequate ventilation or hot air recirculating.
Cooling surfaces of compressor or Intercooler excessively dirty.
Ambient temperature too high.
Scored or excessively worn cylinder walls.
10
Probable Cause
Trouble
Worn piston rings.
Air intake restricted.
Compressor running too hot.
Breather valve not functioning properly.
Oil level in crankcase too high.
Oil viscosity wrong for the application.
Connection rod Out of alignment, bent or twisted.
Leaking oil seal.
Running unloaded too long.
Piston rings not seated. Allow 100 hours for seating.
Wrong oil, may be a detergent oil with a tendency to foam, etc.
Excessive current draw. Low voltage.
Loose electrical connection.
Wire size too small.
Motor too small.
Air discharge pressure too high
.Bearings tight or seizing.
No crankshaft endplay.
Compressor speed too high.
Motor bad.
Compressor not unloaded.
Failure to start.
11
TROUBLE SHOOTING (Continued)
Power not on.
Blown circuit fuse or circuit breaker tripped.
Thermal motor overload tripped.
Low voltage.
Faulty start switch.
Power failure.
Pressure switch misadjusted or inoperable.
Loose or broken wire.
Motor bad.
Compressor not unloading.
Probable Cause
Excessive oil
consumption.
Trouble
Motor stalls.
Duplex will not
alternate.
Constant air bleed from
pressure switch.
LONG TERM STORAGE
A compressor unit should not be stored without proper preservation for more than six (6)
weeks. This is not a hard rule as the location must be taken into consideration. In very
damp climates compressors could be stored for one (1) to two (2) weeks and in very dry
climates a compressor could be stored for ten (10) to twelve (12) weeks.
PROCESSING A COMPRESSOR FOR EXTENDED STORAGE:
1. Fill the crankcase with a preservative oil.
2. Remove the suction and discharge valve cover plates and spray preservative oil
over valves.
3. Remove air filter and tape openings shut with moisture resistant tape or plug with
plastic pipe plugs.
4. Disconnect discharge pipe between compressor and air receiver. Tape or plug
openings in compressor and air receiver the same as in step 3.
5. Cover entire unit with plastic covering to keep out moisture and to keep dust and
dirt off unit.
12
TROUBLE SHOOTING (Continued)
Motor overloaded. See “Excessive current drawn” in this section.
Alternator relay loose in the socket.
COMP1/ALT/COMP2 switch not in ALT mode.
Pressure switch Improperly adjusted.
No voltage to respective starter.
Thermal motor overload tripped.
Bad alternator relay.
Motor bad.
Worn or damaged pressure switch dia
phragm.
Pressure switch bleeder valve stuck.
Discharge check valve stuck or faulty.
Probable Cause