Gardner Denver ELECTRA-SAVER ETY99A User manual

GARDNER DENVER
ELECTRA–SAVER
TWO–STAGE
STATIONARY BASE–MOUNTED
COMPRESSOR
AUTO SENTRY–ES+ CONTROLS
MODEL
ETY99A – 350 HP – 500 HP
OPERATING AND
SERVICE MANUAL
13–13–600
1st Edition
January, 1998

13–13–600 Page i
MAINTAIN COMPRESSOR RELIABILITY AND PERFORMANCE WITH
GENUINE GARDNER DENVER COMPRESSOR
PARTS AND SUPPORT SERVICES
Gardner Denver Compressor genuine parts, engine-
ered to original tolerances, are designed for optimum
dependability–––specificallyforGardnerDenvercom-
pressor systems. Design and material innovations are
theresultofyearsofexperiencewithhundredsofdiffer-
ent compressor applications. Reliability in materials
and quality assurance are incorporated in our genuine
replacement parts.
Your authorized Gardner Denver Compressor distribu-
tor offers all the backup you’ll need. A worldwide net-
workofauthorizeddistributorsprovidesthefinestprod-
uct support in the air compressor industry.Your local
authorized distributor maintains a large inventory of
genuinepartsandheisbackedup foremergencyparts
by direct access to the Gardner Denver Machinery Inc.
Master Distribution Center (MDC) in Memphis, Ten-
nessee.
Your authorized distributor can support your Gardner
Denver air compressor with these services:
1. Trained parts specialists to assist you in selecting
the correct replacement parts.
2. Factory warranted new and remanufactured
rotaryscrewair ends.Most popularmodelreman-
ufacturedairendsaremaintainedinstockatMDC
for purchase on an exchange basis with liberal
core credit available for the replacement unit.
3. AfulllineoffactorytestedAEONtcompressorlu-
bricantsspecifically formulatedfor use inGardner
Denver compressors.
4. Repair and maintenance kits designed with the
necessary parts to simplify servicing your com-
pressor.
Authorized distributor service technicians are factory–
trained and skilled in compressor maintenance and re-
pair. They are ready to respond and assist you by pro-
viding fast, expert maintenance and repair services.
For the location of your local authorized Gardner Denver Air Compressor distributor refer to the yellow
pages of your phone directory or contact:
Distribution Center: Factory:
Gardner Denver Machinery Inc. Gardner Denver Machinery Inc.
Master Distribution Center 1800 Gardner Expressway
5585 East Shelby Drive Quincy, IL 62301
Memphis, TN 38141 Phone: [phone]
Phone: [phone] Fax: [phone]
(800) 245–4946
Fax: [phone]
REMANUFACTURED AIR ENDS
Whenever an air end requires replacement or repair,
Gardner Denver offers an industry unique, factory re-
manufactured air end exchange program. From its
modern Remanufacturing Center in Indianapolis, IN,
GardnerDenver iscommitted tosupplying youwith the
highest quality, factory remanufactured air ends that
are guaranteed to save you time, aggravation and
money.
Immediately Available
Repair downtime costs you money, which is why there
are over 200 remanufactured units in inventory at all
times, ready for immediate delivery.
Skilled Craftsmen
Our Remanufacturing assembly technicians average
over 20 years experience with air compression products.
Precision Remanufacturing
All potentially usable parts are thoroughly cleaned, in-
spected and analyzed. Only those parts that can be
brought back to original factory specifications are re-
manufactured. Everyremanufactured airend receives
anewoverhaulkit: bearings,gears,seals,sleevesand
gaskets.
Extensive Testing
Gardner Denver performs testing that repair houses
justdon’t do. Magnafluxand ultrasonicinspectionspot
cracked or stressed castings, monochromatic light
analysis exposes oil leaks, and coordinate measure-
ment machine inspects to +/– .0001”, insuring that all
remanufactured air ends meet factory performance
specifications.
Warranty
Gardner Denver backs up every remanufactured air
end with a new warranty . . . 18 months from purchase,
12 months from service.
GardnerDenverremanufacturedairendsdeliver
quali-
ty without question . . . year in and year out.
Call Gardner Denver for information on the air end ex-
change program and the name of your authorized dis-
tributor. Phone Number: 800–245–4946 or
FAX: [phone]

13–13–600 Page ii
FOREWORD
Gardner Denver Rotary Screw compressors are the result of advanced engineering and skilled manufacturing. To
beassuredofreceivingmaximumservicefromthismachinetheownermustexercisecareinitsoperationandmain-
tenance.Thisbookiswrittentogivetheoperatorandmaintenancedepartmentessentialinformationforday–to–day
operation,maintenance andadjustment.Careful adherenceto theseinstructions willresult ineconomical operation
and minimum downtime.
Danger is used toindicate the presenceof a hazard whichwill cause severepersonal
injury, death, or substantial property damage if the warning is ignored.
Warningisused toindicatethe presenceof ahazardwhich cancausesevere person-
al injury, death, or substantial property damage if the warning is ignored.
Caution is used to indicate the presence of a hazard which will or can cause minor
personal injury or property damage if the warning is ignored.
Notice is used tonotify people of installation, operationor maintenance information
which is important but not hazard–related.
This book covers the following models:
Controller
HP PSIG Air Cooled Water Cooled Parts List Manual
350 100 & 125 ETY99A ETY99A 13–13–500 13–9/10–647
400 100, 125, 150 ETY99A ETY99A 13–13–500 13–9/10–647
500 100, 125, 150 ETY99A ETY99A 13–13–500 13–9/10–647

13–13–600 Page iii
TABLE OF CONTENTS
Maintain Compressor Reliability and Performance With Genuine Gardner Denver Compressor Parts
and Support Services i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remanufactured Air Ends i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreword ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Illustrations vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1, General Information 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 2, Installation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 3, Starting & Operating Procedures 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 4, Controls & Instrumentation 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 5, Lubrication, Oil Cooler, Oil Filter & Separator 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 6, Air Filter 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 7, Coupling 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 8, Maintenance Schedule 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 9, Trouble Shooting 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Last Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTRUCTIONS FOR ORDERING REPAIR PARTS
When ordering parts, specify Compressor MODEL,
Method of Cooling, HORSEPOWER and SERIAL
NUMBER(see nameplateonunit). The SerialNumber
isalso stampedon topof thecylinder flangeto theright
of the inlet housing.
All orders for Parts should be placed with the nearest
authorized distributor.
Where NOT specified, quantity of parts required per
compressor or unit is one (1); where more than one is
required per unit, quantity is indicated in parenthesis.
SPECIFY EXACTLY THE NUMBER OF PARTS
REQUIRED.
DO NOT ORDER BY SETS OR GROUPS.
To determine the Right Hand and Left Hand side of a
compressor, stand at the motor end and look toward
the compressor. Right Hand and Left Hand are
indicated in parenthesis following the part name, i.e.
(RH) & (LH), when appropriate.

INDEX
13–13–600 Page iv
Actuator, Turn Valve 24. . . . . . . . . . . . . . . . . . . . . . .
Addition of Oil Between Changes 33. . . . . . . . . . . .
Aftercooler 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR FILTER, SECTION 6 42. . . . . . . . . . . . . . . . . . .
Air Filter Element Life 42. . . . . . . . . . . . . . . . . . . . . .
Air Filter Vacuum Switch 24. . . . . . . . . . . . . . . . . . .
Air Flow in the Compressor System 1. . . . . . . . . . .
Air Receiver, Auxiliary 11. . . . . . . . . . . . . . . . . . . . . .
Air–Cooled Oil Cooler Module 9. . . . . . . . . . . . . . . .
Ventilation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Sentry Operation 20. . . . . . . . . . . . . . . . . . . . .
Blowdown Valve 22, 23. . . . . . . . . . . . . . . . . . . . . .
Change Procedure, Lubricant 33. . . . . . . . . . . . . . .
Check, Daily 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Draining Oil System 34. . . . . . . . . . .
Cold Ambient Operation 33. . . . . . . . . . . . . . . . . . . .
Cold Weather Operation 13. . . . . . . . . . . . . . . . . . .
Cold Weather Operation, Installation for 12. . . . . .
Compression Principle 1. . . . . . . . . . . . . . . . . . . . . .
Compressor 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor (GD Eliminator) Oil Separator 39. . .
Compressor Oil Cooler 36. . . . . . . . . . . . . . . . . . . . .
Compressor Oil Cooler – Water–Cooled Heat
Exchanger 38. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil Filter 35. . . . . . . . . . . . . . . . . . . . . .
Compressor Oil System 30. . . . . . . . . . . . . . . . . . . .
Compressor Oil System Check 41. . . . . . . . . . . . . .
Control Devices 20. . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Transformer 25. . . . . . . . . . . . . . . . . . . . . . .
Controller 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTROLS & INSTRUMENTS, SECTION 4 20.
Controls & Instruments, General Description 20. .
Cooler, Compressor Oil 36. . . . . . . . . . . . . . . . . . . .
Cooling, Sealing and Lubrication 1. . . . . . . . . . . . .
COUPLING, SECTION 7 44. . . . . . . . . . . . . . . . . . .
Coupling 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Individual Cushion Design 44. . . . . . . . . . . . . . .
Daily Check 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Decals 6, 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharge Service Line 13. . . . . . . . . . . . . . . . . . . .
Discharge Thermistor 24. . . . . . . . . . . . . . . . . . . . . .
Drain, Oil Reservoir 9. . . . . . . . . . . . . . . . . . . . . . . . .
Draining and Cleaning Oil System 34. . . . . . . . . . .
Electric Motor Grease Recommendations 17. . . .
Electric Motor Regreasing Interval 17. . . . . . . . . . .
Electrical Wiring 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Element Life, Air Filter 42. . . . . . . . . . . . . . . . . . . . .
Emergency Stop Push–Button 24. . . . . . . . . . . . . .
Enclosure 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Starter 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling Oil Reservoir 35. . . . . . . . . . . . . . . . . . . . . . . .
Filter, Compressor Oil 35. . . . . . . . . . . . . . . . . . . . . .
Filter Element 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Heavy Duty Air (Standard) 42. . . . . . . . . . . .
Foundation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gauge, Oil Level 22, 34. . . . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION, SECTION 1 1. . . . . .
Grease Recommendations, Electric Motor 17. . . .
Grounding 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Temperature Operation 30. . . . . . . . . . . . . . . .
Inlet Line 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Screen and Tube 43. . . . . . . . . . . . . . . . . . . . .
Inlet Valve 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION, SECTION 2 8. . . . . . . . . . . . . . . .
Installation, General 8. . . . . . . . . . . . . . . . . . . . . . . .
Installation for Cold Weather Operation 12. . . . . .
Lifting Unit 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line, Discharge Service 13. . . . . . . . . . . . . . . . . . . .
Line, Inlet 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Oil Pressure Protection 9. . . . . . . . . . . . . . . . .
Lubricant, Recommended 30. . . . . . . . . . . . . . . . . .

INDEX
13–13–600 Page v
Lubricant Change Procedure 33. . . . . . . . . . . . . . .
Lubrication, Cooling and Sealing 1. . . . . . . . . . . . .
Lubrication, Motor 16. . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION, OIL COOLER, OIL FILTER &
SEPARATOR, SECTION 5 30. . . . . . . . . . . . . .
Main Starter 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE SCHEDULE, SECTION 8 45. . .
Minimum Discharge Pressure Valve 22. . . . . . . . .
Moisture in the Oil System 34. . . . . . . . . . . . . . . . . .
Moisture Separator/Trap 13. . . . . . . . . . . . . . . . . . .
Motor Grease Recommendations 17. . . . . . . . . . .
Motor Lubrication 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Regreasing Interval 17. . . . . . . . . . . . . . . . . .
Oil Change Interval 34. . . . . . . . . . . . . . . . . . . . . . . .
Oil Cooler, Compressor 36. . . . . . . . . . . . . . . . . . . .
Oil Cooler – Installation 11. . . . . . . . . . . . . . . . . . . .
Oil Cooler – Location and General Piping 10. . . . .
Oil Filter, Compressor 35. . . . . . . . . . . . . . . . . . . . . .
Oil Level Gauge, 22, 34
Oil Reservoir 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Reservoir, Filling 35. . . . . . . . . . . . . . . . . . . . . . .
Oil Reservoir Drain 9. . . . . . . . . . . . . . . . . . . . . . . . .
Oil Separator
Compressor (GD Eliminator) 39. . . . . . . . . . . . .
Inspection 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Carryover 40. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal for Inspection or Replacement 40. . .
Oil Specifications 30. . . . . . . . . . . . . . . . . . . . . . . . . .
Oil System
Compressor 30. . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining and Cleaning 34. . . . . . . . . . . . . . . . . .
Oil System Check 41. . . . . . . . . . . . . . . . . . . . . . . . .
Air and Oil Discharge Temperature 41. . . . . . .
Compressor Oil Inlet Temperature 41. . . . . . . .
Oil Cooler Oil Pressure Differential 41. . . . . . . .
Oil Cooler Temperature Differential 41. . . . . . .
Oil Cooler Water Pressure Differential 41. . . . .
Oil Inlet Pressure 41. . . . . . . . . . . . . . . . . . . . . . .
Operation
Cold Ambient 33. . . . . . . . . . . . . . . . . . . . . . . . . .
High Temperature 30. . . . . . . . . . . . . . . . . . . . . .
Optional Switches 24. . . . . . . . . . . . . . . . . . . . . . . . .
Piping, Water 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Differential Gauging 40. . . . . . . . . . . . . . .
Pressure Regulator 22. . . . . . . . . . . . . . . . . . . . . . . .
Prestart–Up Instructions 18. . . . . . . . . . . . . . . . . . . .
Air Filter 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil 18. . . . . . . . . . . . . . . . . . . . . . . .
Coupling 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enclosure 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grounding 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Mode 19. . . . . . . . . . . . . . . . . . . . . . . .
Piping 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Pressure 19. . . . . . . . . . . . . . . . . . . . . . .
Purge Air Valve 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Lubricant 30. . . . . . . . . . . . . . . . . . .
Regreasing Interval, Electric Motor 17. . . . . . . . . .
Regulator, Pressure 22. . . . . . . . . . . . . . . . . . . . . . .
Relief Valve 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts, Ordering Instructions iii. . . . . . . . . . .
Reservoir, Oil 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reservoir Pressure Transducer 24. . . . . . . . . . . . .
Safety Precautions 4, 5. . . . . . . . . . . . . . . . . . . . . . .
Sealing, Lubrication and Cleaning 1. . . . . . . . . . . .
Separator, Compressor (GD Eliminator) Oil 39. . .
Separator/Trap, Moisture 13. . . . . . . . . . . . . . . . . . .
SERVICE CHECK LIST, AIR FILTER 45. . . . . . . .
Service Check List 45. . . . . . . . . . . . . . . . . . . . . . . .
Every 1000 Hours Operation 45. . . . . . . . . . . . .
Every 125 Hours Operation 45. . . . . . . . . . . . . .
Every 6000 Hours Operation 45. . . . . . . . . . . . .
Every 8 Hours Operation 45. . . . . . . . . . . . . . . .

INDEX
13–13–600 Page vi
Every Year 45. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Lubrication 45. . . . . . . . . . . . . . . . . . . . . . .
Oil Separator 45. . . . . . . . . . . . . . . . . . . . . . . . . .
Shuttle Valve 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Solenoid Valves IVC and IVO 22. . . . . . . . . . . . . . .
Solenoid Valves TVC and TVO 24. . . . . . . . . . . . . .
Specifications, Oil 30. . . . . . . . . . . . . . . . . . . . . . . . .
Starter
Fan 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTING & OPERATING PROCEDURES,
SECTION 3 18. . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the Unit 19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Cold 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Hot 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stopping the Unit 19. . . . . . . . . . . . . . . . . . . . . . . . . .
Strip, Terminal 25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch, Air Filter Vacuum 24. . . . . . . . . . . . . . . . . . .
Switches, Optional 24. . . . . . . . . . . . . . . . . . . . . . . .
System Pressure Transducer 24. . . . . . . . . . . . . . .
System Thermistor 24. . . . . . . . . . . . . . . . . . . . . . . .
Terminal Strip 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Control (Thermostatic Mixing) Valve 37.
Thermistor
Discharge 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transducer
Reservoir Pressure 24. . . . . . . . . . . . . . . . . . . . .
System Pressure 24. . . . . . . . . . . . . . . . . . . . . . .
Transformer, Control 25. . . . . . . . . . . . . . . . . . . . . . .
TROUBLE SHOOTING, SECTION 9 46. . . . . . . . .
Tube, Inlet 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Valve 2, 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Valve Actuator 24. . . . . . . . . . . . . . . . . . . . . . . .
Valve
Blowdown 22, 23. . . . . . . . . . . . . . . . . . . . . . . . .
Inlet 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Discharge Pressure 22. . . . . . . . . . . .
Purge Air 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relief 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shuttle 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Solenoid IVC and IVO 22. . . . . . . . . . . . . . . . . . .
Solenoid TVC and TVO 24. . . . . . . . . . . . . . . . .
Thermal Control (Thermostatic Mixing) 37. . . .
Turn 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Flow Control 38. . . . . . . . . . . . . . . . . . . . .
Water Shutoff 39. . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Last Page. . . . . . . . . . . . . . . . . . . . . . . . . .
Water Flow Control Valve for Heat Exchanger 38.
Water Piping 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Shutoff Valve – Water–Cooled Heat Ex-
changer 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Electrical 15. . . . . . . . . . . . . . . . . . . . . . . . . .

13–13–600 Page vii
LIST OF ILLUSTRATIONS
Figure # Description Page
Figure 1–1 Compression Cycle 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–2 Air Cooled Unit – Less Enclosure – 1st Stage Compressor Side 2. . . . . . . . . . . . . . . . . . . . . .
Figure 1–3 Air Cooled Unit – Less Enclosure – 2nd Stage Compressor Side 2. . . . . . . . . . . . . . . . . . . . .
Figure 1–4 Air Cooled Unit – Less Enclosure – Control Box End 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–5 Air Cooled Unit – Less Enclosure – Oil Reservoir End 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1 Typical Compressor Room 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2 Air Flow Chart 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–3 Piping Schematic 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4 Piping Diagram for Aftercooler and Heat Exchanger 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5 Cooler Drain Detail 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–6 Cold Weather Installation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–7 Inlet Line Lengths 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–8 Heat Exchanger (Oil Cooler) Approximate Water Flow 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–9 Aftercooler Approximate Water Flow 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–10 Ampacity, Fuse and Breaker Sizes 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–1 Schematic Tubing Diagram 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2 Blowdown Valve 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–3 Minimum Discharge Pressure Valve 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–4 Inlet Valve 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–5 Shuttle Valve 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–6 Turn Valve Control 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–7 Turn Valve Actuator 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–8 Control Schematic – Compressor at Full Load 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–9 Control Schematic – Compressor Fully Unloaded – Constant Speed Mode 27. . . . . . . . . . .
Figure 4–10 Control Schematic – Compressor Fully Unloaded – Low Demand Mode or Auto Mode 28.
Figure 4–11 Wiring Diagram – 212EAP546 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–1 Flow Diagram 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–2 Oil Flow Diagram – Remote Overhead Mounted 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–3 Oil Change Interval 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–4 Approximate Oil System Capacities 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–5 Water Control Valve 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–6 Dew Point Temperature vs. Ambient Temperature, (100% Relative Humidity) 39. . . . . . . . .
Figure 5–7 Single Element Oil Separator 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1 Heavy Duty Air Filter (Standard) 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–1 Installation of Coupling Cushions 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13–13–600 Page 1
SECTION 1
GENERAL INFORMATION
FIGURE 1–1 – COMPRESSION CYCLE
COMPRESSOR – The Gardner Denver Electra–Sav-
erRcompressor is a single stage, positive displace-
mentrotarymachineusing meshinghelicalrotorsto ef-
fect compression. The input drive shaft and helical
drive gear are supported in the gear case by high ca-
pacity tapered roller bearings. The drive gear meshes
with a driven gear mounted on the main rotor shaft to
drive the rotors. Both rotors are supported between
largecapacityanti–frictionbearingslocatedoutsidethe
compression chamber. Single width cylindrical roller
bearings are used at the inlet end of the rotors. Early
models used two (2) heavy–duty, single–row, angular
contact ball bearings at the discharge end to locate
each rotor axially and carry all thrust loads; later mod-
els use tapered roller bearings in this location.
COMPRESSION PRINCIPLE (FIGURE 1–1) – Com-
pression is accomplished by the main and secondary
rotors synchronously meshing in a one–piece cylinder.
Themain rotorhas four (4)helical lobes90_apart. The
secondary rotor has five (5) matching helical grooves
72_apart to allow meshing with main rotor lobes.
The air inlet port is located on top of the compressor
near the center. The discharge port is near the bottom
at the opposite end of the compressor cylinder.
Figure
1–1 is an inverted view to show inlet and discharge
ports
.Thecompression cyclebeginsas rotorsunmesh
attheinlet port and air is drawn into the cavitybetween
the main rotor lobes and secondary rotor grooves (A).
When the rotors pass the inlet port cutoff, air is trapped
intheinterlobecavityandflowsaxiallywiththemeshing
rotors (B). As meshing continues, more of the main ro-
tor lobe enters the secondary rotor groove, normal vol-
ume is reduced and pressure increases.
Oil is injected into the cylinder to remove the heat of
compression and seal internal clearances. Volume re-
ductionandpressureincreasecontinuesuntiltheair/oil
mixture trapped in the interlobe cavity by the rotors
passesthedischargeportandisreleasedtotheoilres-
ervoir(C). Each rotor cavity followsthe same “fill–com-
press–discharge” cycle in rapid succession to produce
a discharge air flow that is continuous, smooth and
shock free.
AIR FLOW (FIGURE 5–1, page 31) – Air enters the air
filterand passes through the inletunloader valve to the
first stage compressor. After first stage compression,
the air/oil mixture passes through the interstage man-
ifold where coolant is injected. The air/oil mixture then
iscompressedtothefinaldischargepressureinthese-
cond stage compressor. After compression, the air/oil
mixture passes into the oil reservoir where most of the
entrained oil is removed by velocity change and im-
pingement and drops back into the reservoir. The air
andremainingoilthenpassesthroughtheoilseparator,
theseparated oil is returned tothe system through tub-
ing connecting the separator and the first stage com-
pressor. The air passes through the reservoir dis-
charge manifold, minimum pressure/discharge check
valve, and the customer furnished unit shutoff valve if
aftercooled. If water cooled, the aftercooler and mois-
tureseparator are between the minimum pressure/dis-
charge check valve and the customer supplied shutoff
valve.
LUBRICATION, COOLING AND SEALING – Oil is
forcedbyair pressurefromthe oilreservoirthrough the
oil cooler, thermostatic mixing valve/oil filter assembly
and is piped to the first stage compressor, second
stage compressor and the interstage manifold. A por-
tionof the oil to the compressors isdirected through in-
ternal passages to the bearings, gears and shaft oil
seals. Thebalance of theoil is injected directlyinto the

13–13–600 Page 2
compressionchamber toremove heat ofcompression,
seal internal clearances and lubricate the rotors.
TURN VALVE – The turn valve is a rotary helical valve
locatedonthedischargesideofthe cylindertowardthe
inletend.Thevalveopensandclosesportsinthecylin-
der which communicates with the inlet passage. This
varies the compressor rotor volume to match the de-
mand for air, thus reducing the part–load power re-
quirement.
FIGURE 1–2 – AIR COOLED UNIT – LESS ENCLOSURE – 1ST STAGE COMPRESSOR SIDE
300ETY797
(Ref. Drawing)
FIGURE 1–3 – AIR COOLED UNIT – LESS ENCLOSURE – 2ND STAGE COMPRESSOR SIDE
300ETY797
(Ref. Drawing)

13–13–600 Page 3
FIGURE 1–4 – AIR COOLED UNIT – LESS ENCLOSURE – CONTROL BOX END
300ETY797
(Ref. Drawing)
FIGURE 1–5 – AIR COOLED UNIT – LESS ENCLOSURE – OIL RESERVOIR END
300ETY797
(Ref. Drawing)

13–13–600 Page 4
SAFETY PRECAUTIONS
Safety is everybody’s business and is based on your use of good common sense. All situations or circumstances
cannot always be predicted and covered by established rules. Therefore, use your past experience, watch out for
safety hazards and be cautious.
Some general safety precautions are given below:
Failure to observe these notices could result in injury to or death of personnel.
DKeep fingers and clothing away from revolving fan, drive coupling, etc.
DDo not use the air discharge from this unit for breathing – not suitable for hu-
man consumption.
DDonot loosenorremove the oilfiller plug,drain plugs,covers,the thermostat-
icmixingvalve orbreakanyconnections, etc.,inthecompressor airoroilsys-
tem until the unit is shut down and the air pressure has been relieved.
DElectrical shock can and may be fatal.
DCompressor unit must begrounded inaccordance withthe National Electrical
Code. A ground jumper equal to the size of the equipment ground conductor
must be used to connect the compressor motor base to the unit base.
DFan motors must remain grounded to the main base through the starter
mounting panel in accordance with the National Electrical Code.
DOpen main disconnect switch, tag and lockout before working on the control.
DDisconnect the compressor unit from its power source, tag and lockout be-
fore working on the unit – this machine is automatically controlled and may
start at any time.

13–13–600 Page 5
Failure to observe these notices could result in damage to equipment.
DStop the unit if any repairs or adjustments on or around the compressor are
required.
DDisconnect the compressor unit from its power source, tag and lockout be-
fore working on the unit – this machine is automatically controlled and may
start at any time.
DAn Excess Flow Valve should be on all compressed air supply hoses ex-
ceeding 1/2 inch inside diameter. (OSHA Regulation, Section 1926.302)
DDonot exceed the rated maximum pressurevalues shown on the nameplate.
DDo not operate unit if safety devices are not operating properly. Check peri-
odically. Never bypass safety devices.

13–13–600 Page 6
DECALS
206EAQ077 212EAQ077
218EAQ077
211EAQ077 207EAQ077

13–13–600 Page 7
DECALS
216EAQ077
217EAQ077
222EAQ077
221EAQ077 208EAQ077

13–13–600 Page 8
SECTION 2
INSTALLATION
GENERAL– On receipt of theunit, check for any dam-
agethatmayhavebeenincurredduringtransit. Report
any damage or missing parts as soon as possible.
Do not electric weld on the compres-
sor or base; bearings can be damaged
by passage of current.
LIFTING UNIT:
Lift compressor unit by base only. Do
not use other places such as motor,
compressor or discharge manifold
piping as lifting points.
The eyebolts or lugs provided on the
motor are for lifting the motor only
and should not be used to lift any
additional weight. All eyebolts must
be securely tightened. When lifting
the motor the lifting angle must not
exceed 15 degrees. Failureto observe
this warning may result in damage to
equipment or personal injury.
Compressor, air/oil reservoir, separa-
tion chamber and all piping and tub-
ingmaybe athightemperatureduring
and after operation.
LOCATION – The compressor should be installed in a
clean, well–lighted, well–ventilated area with ample
space all around for maintenance. Select a location
that provides a cool, clean, dry source of air. In some
casesitmaybenecessarytoinstalltheairfilteratsome
distance from the compressor to obtain proper air sup-
ply.
The compressor unit require electric motor cooling air
aswellasairtothecompressorinlet.Properventilation
MUST be provided (FIGURE 2–2); hot air must be ex-
hausted from the compressor operating area. A typical
inlet–outlet air flow arrangement is shown in
FIGURE 2–1.
FIGURE 2–1 – TYPICAL COMPRESSOR ROOM
If the air–cooled oil cooler module is to be installed at
a location remote from the compressor unit, be sure
that adequate ventilation is provided, FIGURE 2–2.
Hot air must be exhausted from the oil cooler area.
Do not block the air flow to and from the unit. Allow
3–1/2 feet to the nearest obstruction on the control box
Open Unit With
Aftercooler Aftercooler & Oil
Open and Cooler Module
Compressor Oil Cooler Discharge in
Size Unit Module Same Room
350 HP 12,600 43,000 55,600
400 HP 14,400 43,000 57,400
500 HP 18,000 43,000 61,000
* 80_F Inlet Air
FIGURE 2–2 – AIR FLOW CHART

13–13–600 Page 9
FIGURE 2–3 – PIPING SCHEMATIC
PIPING SCHEMATIC OF COOLER
WITH SCREWED CONNECTIONS. PIPING SCHEMATIC OF COOLER
WITH FLANGED CONNECTIONS.
side of the unit and 3 feet on all other sides.
VENTILATION – The unit, whether air– or water–
cooled, requires sufficient air flow, FIGURE 2–2, for
electric motor cooling. Air is drawn into the back and
front of the motor and is discharged out the sides. Do
not block air flow to and from the unit.
FOUNDATION – The Electra–Saverrcompressor re-
quiresno specialfoundation butshould bemounted on
asmooth, solid surface of sufficientstrength to support
theweightoftheunit.Wheneverpossibleinstalltheunit
near level. Temporary installation may be made at a
maximum 10_angle lengthwise or 30_sidewise.
Mounting bolts are not normally required. However,
installation conditions such as piping rigidity, angle of
tilt,ordanger ofshiftingfrom outsidevibrationsor mov-
ing vehicles may require the use of mounting bolts to
the foundation.
OIL RESERVOIR DRAIN – (FIGURE 1–5, page 3)
The oil reservoir drain valve is located near the center
of the oil reservoir just below the separator tower. The
drainvalveis approximately5 inchesfromthe floorlev-
el.Ifthisheightisnotsufficienttoconvenientlydrainthe
oil, some other methods of providing oil drain are:
1. Elevate the compressor unit on a suitable struc-
ture to obtain the desired drain height.
2. Construct an oil sump or trough below the floor
level and pump or bail the drained oil.
3. Pump oil from the reservoir filler opening or drain
to a container.
ACOUSTIC ENCLOSURE – The Electra–Saverrunit
is furnished with an acoustic enclosure over the com-
pressor only, as standard equipment. The enclosure
reduces the normal operating sound of the unit to 90
DBA or below in free field conditions.
AIR–COOLED OIL COOLER MODULE – The air–
cooled oil cooler is a separate module and may be
mounted remote to the compressor unit.
Ventilation – The oil cooler requires adequate cooling
airflow. ProperventilationMUST beprovided, with hot
air exhausted away from the cooler; take care that hot
air is not recirculated form the exhaust to the inlet side
ofthecooler.Coolingairflowdirectionisfromthemotor
side through the grille side of the oil cooler. Do not ob-
structtheairflowtoorfromthecooler.Allowtwo(2)feet
clearance on all sides of the cooler module. See
FIGURE 2–2, page 8, for cooling air flow require-
ments.
LowOil Pressure Protection –The standardfactory–
installedlowoilpressureshutdownswitchinthecontrol
box will prevent start–up or shut the unit down if oil
pressure is not established or maintained due to mal-
function in the oil cooler system.

13–13–600 Page 10
FIGURE 2–4 – PIPING DIAGRAM FOR AFTERCOOLER AND HEAT EXCHANGER
Remote mounted elevated coolers
haveamaximumpipelength of30feet
(9 M) (each way) and a maximum
height of 20 feet (6 M) with a minimum
of fittings. Engineering will review all
remote elevated cooler applications
and recommend pipe size on an indi-
vidual basis. Customer Service
should include the engineering rec-
ommendation in the special order
sent to Engineering.
Oil Cooler – Location and General Piping – The oil
coolermodulecanbemountedinanyofseveralremote
locations:
SClose coupled but not joined to the compressor
unit
SHorizontal remote, located on the same level as
the compressor unit, but some distance away
SOverhead remote, located above level of the
compressor unit, as on a roof.
The machine cannot be run blown
down with remote overhead oil cool-
er. These units require special wiring
diagram – check with factory. Run-
ning the machine blown down with an
overhead cooler could result in dam-
age to compressor.
All requirements of local codes
should be followed.
All piping and wiring between the compressor unit and
the remote oil cooler is to be supplied by the user. THE
DESIGN OF THE REMOTE OIL COOLER MODULE
SYSTEM MUST BE APPROVED BY THE FACTORY
BEFORE INSTALLATION. The design information to
be submitted for approval includes:
1. Locationof oil cooler module –inside or outdoors.
2. Range of operating ambient temperatures at the
oil cooler location.

13–13–600 Page 11
3. Elevation of the oil cooler above the compressor
unit.
4. Pipe type and size(s) to be used to connect the oil
cooler and the compressor unit. Minimum pipe
size is 2–1/2” NPT.
5. Horizontal and vertical lengths of the pipe run. If
morethanonepipesizeisused,listlengthofeach
size and total length.
6. Number and size of elbows, tees, unions, reduc-
ers, and valves to be used in the pipe run.
7. A dimensional sketch of the proposed piping sys-
tem showing location of the compressor unit, oil
cooler, pipe, and fittings illustrating design in-
formationincluded in numbers3 through 6above.
All remote piping should be of adequate size to insure
a minimum pressure loss. Number 4 above lists the
minimum pipe size to be used. Long runs of pipe and
the use of valves and fittings require larger than the
minimumpipe sizesin thesystem to keepthe pressure
losslow.All pipeand fittings used ina remote oilcooler
system should be galvanized or treated internally to
prevent rust, and all valves are to be of a nonferrous
construction to prevent corrosion and fouling.
The remote cooler should be placed so that the fan air
flow through the cooler (air flow is from the motor side
through core) and the prevailing winds are in the same
direction. A baffle should be provided on the exhaust
sideofthecoolerforprotectionagainstoccasionalwind
shifts.
When the oil cooler is mounted above the compressor
unit,a checkvalveis tobe mountedon thecompressor
unit in the line to the oil cooler; see FIGURE 5–3, page
34. A pneumatic pilot–operated normally–closed valve
(oil stop valve) is to be mounted at the oil filter inlet on
the compressor unit line from the oil cooler. The check
valve permits oil flow to the oil cooler during operation,
but prevents return oil flow from the cooler when the
unit is shut down. The pilot valve is held open by air
pressurefromtheunitoilreservoirduringoperationand
closes under spring load when the unit is shut down to
prevent return oil flow from the oil cooler. A different
control group will be assembled onto the package to
controltheoilstopvalveandtopreventthecompressor
package from running in low demand mode. Failure to
install these parts could result in high oil carryover and
couldcause the machine to shutdown on high temper-
ature.
An oil filler stand pipe and plug must be located in the
pipingon theoil cooler modulefor easeof filling ofa re-
mote oil cooler, see FIGURE 5–2, page 32.
Oil Cooler – Installation – Inspect unit upon arrival.
In case of damage, report immediately to transporta-
tioncompany. Before installation, checkrating plate on
motorto verifythat powerinput andmotor specification
FIGURE 2–5 – COOLER DRAIN DETAIL
requirementsmatch available electricpower atpoint of
installation.
1. Set the unit level on a firm, solid foundation. The
larger oil cooler models have lifting holes to facili-
tate unit hoisting.
2. Allow for linear expansion and contraction of pip-
ing in the direction away from the oil cooler. Use
flexibleconnectorsorsuitable expansionjointson
all oil cooler inlet and outlet piping. See
FIGURE 2–3, page 9, for typical schematics.
3. Select properly tensioned and aligned piping sup-
port clamps or hangers and position them to re-
lieve any piping stress at the oil cooler inlet and
outlet ports. Do not support from flexible connec-
tors.
4. Service – For continuous efficiency, oil cooler
cores must be periodically cleaned with either
vacuum or compressed air. If wet cleaning is re-
quired, shield motor and spray on a mild soap
solution and flush with clear water.
AUXILIARY AIR RECEIVER – The unit requires an
auxiliary air receiver unless the piping system is large
andprovidessufficientstorage capacitytopreventrap-
idcycling.Whenused,anairreceivershouldbeofade-
quatesize,providedwithareliefvalveofpropersetting,
a pressure gauge, and a means of draining conden-
sate.
AFTERCOOLER (FIGURE 1–2 and FIGURE 1–5,
pages 2 and 3) – An aftercooler will provide control of
moisture entering the shop air lines while reducing the

13–13–600 Page 12
FIGURE 2–6 – COLD WEATHER INSTALLATION
301ETY797
(Ref. Drawing)
normal low discharge temperature of about 180_F at
100PSIG dischargepressure tonear inletair tempera-
ture, or cooling water temperature.
Air–Cooled Machines – When an aftercooler is fur-
nished on an air–cooled machine, the aftercooler is
installed on the oil cooler module between the fan and
the oil cooler. The moisture separator is furnished by
GardnerDenver but must bemounted by the customer
between the aftercooler and the auxiliary air receiver
with a condensate drain provided at the bottom. All air
piping from the compressor discharge to aftercooler to
auxiliary air receiver is to be furnished and mounted by
customer. The design of the aftercooler piping
must be approved by the factory before installa-
tion. Design information to be submitted for approval
includes:
Failureto removecondensatefrom an
idle cooler in freezing temperatures
will cause permanent cooler damage.
Drain condensate after system shut-
down. It is the owner/operator’s re-
sponsibility to ensure that conden-
sate has been drained and cooler
dried out to prevent cooler damage.
1. Location of aftercooler module – inside or out-
doors.
2. Range of operating ambient temperatures at the
aftercooler location.
3. Pipetype andsize(s)to beused toconnect theaf-
tercooler, separator, and compressor unit – mini-
mum pipe size is 5” NPT.
4. Lengthsof thepiperun. Ifmore thanone pipesize
is used, list length of each size and total length.
5. Number and size of elbows, tees, unions, reduc-
ers, and valves to be used in the pipe run.
6. A dimensional sketch of the proposed piping sys-
tem showing location of the compressor unit, af-
tercooler,separatorandauxiliaryairreceiver,pipe
andfittingsillustratingdesigninformationincluded
in numbers 3 through 5 above.
Water–Cooled Machines (FIGURE 2–4, page 10) –
On water–cooled machines with aftercooler, the mois-
tureseparatorandcondensatedrainareshippedloose
andmust be installed bycustomer.Customer must fur-
nish and install all water piping required.
INSTALLATION FOR COLD WEATHER OPERA-
TION – It is recommended that the unit be installed in-
sideashelterthatwillbeheatedtotemperaturesabove
freezing (32_F, 0_ C). This will eliminate many of the
problems associated with operating units in cold cli-
mates where freezing rain, drifting snow, freezing con-
densateand bittercold temperaturesare encountered.
Refer to Engineering Data Sheet 13–9–411 for the ad-
vantages of using the heat recovered from rotary com-
pressors.Thisheatrecoverycouldeasilypayforanad-
equate shelter for the unit.
When an outside installation must be made, the pre-
cautions required will depend on the severity of the en-