Gardner Denver EDF-KB Service manual

GARDNER DENVER
ELECTRA–SCREWSTATIONARY
BASE–MOUNTED
COMPRESSORS
MODELS
EDF_KB – 60 HP
EDF_LB – 75 HP
EDH_MB – 100 HP
OPERATING AND
SERVICE MANUAL
13–8–606
3rd Edition
March, 1997

13–8–606 Page i
MAINTAIN COMPRESSOR RELIABILITY AND PERFORMANCE WITH
GENUINE GARDNER DENVERRCOMPRESSOR
PARTS AND SUPPORT SERVICES
Gardner DenverRCompressor 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.
Yourauthorized GardnerDenverRCompressordistrib-
utor 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
DenverRair 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 iscommittedtosupplyingyouwiththe
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]

13–8–606 Page ii
FOREWORD
Gardner DenverElectra–Screwcompressors are the result of advanced engineering and skilled manufacturing.
To be assured of receiving maximum service from this machine the owner must exercise care in its operation and
maintenance. This book is written to give the operator and maintenance department essential information for day–
to–day operation, maintenance and adjustment. Careful adherence to these instructions will result in economical
operation and minimum downtime.
Danger is used toindicate the presence of ahazard which will cause severepersonal
injury, death, or substantial property damage if the warning is ignored.
Warningisusedto indicatethepresenceofahazard whichcancausesevereperson-
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,operation or maintenanceinformation
which is important but not hazard–related.
This book covers the following models:
HP PSIG (Bar) Air Cooled Water Cooled Parts List
60 100, 125 EDFQKB EDFSKB 13–9–552
75 100, 125 EDFQLB EDFSLB 13–9–552
100 100, 125 EDHQMB EDHSMB 13–9–549

13–8–606 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 – vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Illustrations vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1, General Information 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 2, Installation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 3, Starting & Operating Procedures 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 4, Controls & Instrumentation 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 5, Lubrication, Oil Cooler, Oil Filter & Separator 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 6, Air Filter 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 7, Coupling 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 8, Maintenance Schedule 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 9, Trouble Shooting 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 RE-
QUIRED.
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 indi-
cated in parenthesis following the part name, i.e. (RH)
& (LH).

13–8–606 Page iv
INDEX
Addition of Oil Between Changes 31. . . . . . . . . . . . . . .
Air Control Components 19. . . . . . . . . . . . . . . . . . . . . . .
Blowdown Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Pressure/Check Valve 19. . . . . . . . . . . .
Air Ends, Remanufactured i. . . . . . . . . . . . . . . . . . . . . .
AIR FILTER, SECTION 6 40. . . . . . . . . . . . . . . . . . . . . .
Air Filter Element 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter Element Life 40. . . . . . . . . . . . . . . . . . . . . . . . .
Air Flow in Compressor System 1. . . . . . . . . . . . . . . . .
Air Receiver, Auxiliary 10. . . . . . . . . . . . . . . . . . . . . . . . .
Air–Cooled Units, Location 8. . . . . . . . . . . . . . . . . . . . .
AUTO LAG Button with LED 20. . . . . . . . . . . . . . . . . . .
AUTO LEAD Button with LED 20. . . . . . . . . . . . . . . . . .
Auto–Sentry S Controller with Keypad 19. . . . . . . . . .
Auxiliary Air Receiver 10. . . . . . . . . . . . . . . . . . . . . . . . .
Blowdown Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change Air Filter LED 20. . . . . . . . . . . . . . . . . . . . . . . . .
Change Procedure, Lubricant 31. . . . . . . . . . . . . . . . . .
Change Separator LED 20. . . . . . . . . . . . . . . . . . . . . . .
Check, Daily 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Draining Oil System 33, 34. . . . . . . . . .
Cold Ambient Operation 31. . . . . . . . . . . . . . . . . . . . . . .
Cold Weather Operation 10. . . . . . . . . . . . . . . . . . . . . .
Cold Weather Operation, Installation for 9. . . . . . . . . .
Compression Principle 1. . . . . . . . . . . . . . . . . . . . . . . . .
Compressor 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor (GD Eliminator) Oil Separator 37. . . . . .
Compressor Oil Cooler 35. . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil Filter 34. . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil System 27. . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil System Check 38. . . . . . . . . . . . . . . . .
Compressor System, Air Flow 1. . . . . . . . . . . . . . . . . . .
CONSTANT RUN Button with LED 20. . . . . . . . . . . . .
Control Piping 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System Operation 19. . . . . . . . . . . . . . . . . . . . .
AUTO LAG Button with LED 20. . . . . . . . . . . . . . .
AUTO LEAD Button with LED 20. . . . . . . . . . . . . .
Change Air Filter LED 20. . . . . . . . . . . . . . . . . . . . .
Change Separator LED 20. . . . . . . . . . . . . . . . . . . .
CONSTANT RUN Button with LED 20. . . . . . . . . .
High Air Temperature LED 20. . . . . . . . . . . . . . . . .
Motor Overload LED 20. . . . . . . . . . . . . . . . . . . . . .
Pressure and Temperature Digital Readouts 21.
STOP/RESET Button with LED 19. . . . . . . . . . . . .
Controller, Auto–Sentry S with Keypad 19. . . . . . . . . .
CONTROLS & INSTRUMENTS, SECTION 4 17. . . .
Controls & Instruments, General 17. . . . . . . . . . . . . . .
Cooler, Compressor Oil 35. . . . . . . . . . . . . . . . . . . . . . .
Cooling, Sealing and Lubrication 1. . . . . . . . . . . . . . . .
COUPLING, SECTION 7 42. . . . . . . . . . . . . . . . . . . . . .
Coupling 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alignment 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Individual Cushion Design 42. . . . . . . . . . . . . . . . .
Daily Check 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Decals 6, 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Definitions of Error Messages 21. . . . . . . . . . . . . . . . . .
Devices, Motor Protection 17. . . . . . . . . . . . . . . . . . . . .
Discharge Service Line 12. . . . . . . . . . . . . . . . . . . . . . .
Discharge Temperature, High 17. . . . . . . . . . . . . . . . . .
Drain, Oil Reservoir 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining and Cleaning Oil System 33, 34. . . . . . . . . .
Electric Motor Grease Recommendations 14. . . . . . .
Electric Motor Regreasing Interval 14. . . . . . . . . . . . . .
Electrical Wiring 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Units 13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Element, Air Filter 40. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Element Life, Air Filter 40. . . . . . . . . . . . . . . . . . . . . . . .
Emergency Stop Pushbutton 19. . . . . . . . . . . . . . . . . . .
Enclosure 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Compressor Oil 34. . . . . . . . . . . . . . . . . . . . . . . . .
Foundation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gauge, Oil Level 19, 32. . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION, SECTION 1 1. . . . . . . . .
Grease Recommendations, Electric Motor 14. . . . . . .

13–8–606 Page v
INDEX
Grounding 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Air Temperature LED 20. . . . . . . . . . . . . . . . . . . . .
High Discharge Temperature 17. . . . . . . . . . . . . . . . . . .
High Temperature Operation 27. . . . . . . . . . . . . . . . . . .
Hourmeter 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Line 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Tube 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inlet Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION, SECTION 2 8. . . . . . . . . . . . . . . . . . .
Installation, General 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation for Cold Weather Operation 9. . . . . . . . . .
Instructions for Ordering Repair Parts iii. . . . . . . . . . . .
Instruments 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead–Lag Operation of Two Compressors 23. . . . . . .
Lifting Unit 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line, Discharge Service 12. . . . . . . . . . . . . . . . . . . . . . .
Line, Inlet 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load–Unload Pressure Setpoints, Programming 21.
Location 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air–Cooled Units 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Water–Cooled Units 9. . . . . . . . . . . . . . . . . . . . . . . .
Lubricant, Recommended 27. . . . . . . . . . . . . . . . . . . . .
Lubricant Change Procedure 31. . . . . . . . . . . . . . . . . .
Lubrication, Motor 13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication, Cooling and Sealing 1. . . . . . . . . . . . . . . .
LUBRICATION, OIL COOLER, OIL FILTER &
SEPARATOR, SECTION 5 27. . . . . . . . . . . . . . . . .
MAINTENANCE SCHEDULE, SECTION 8 43. . . . . .
Minimum Pressure/Check Valve 19. . . . . . . . . . . . . . . .
Moisture in the Oil System 32. . . . . . . . . . . . . . . . . . . . .
Moisture Separator/Trap 10. . . . . . . . . . . . . . . . . . . . . .
Motor Grease Recommendations 14. . . . . . . . . . . . . .
Motor Lubrication 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Overload LED 20. . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Protection Devices 17. . . . . . . . . . . . . . . . . . . . . .
Motor Regreasing Interval 14. . . . . . . . . . . . . . . . . . . . .
Oil Change Interval 33. . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Cooler, Compressor 35. . . . . . . . . . . . . . . . . . . . . . .
Oil Filter, Compressor 34. . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Gauge 19, 32. . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Reservoir 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Reservoir Drain 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Separator
Compressor (GD Eliminator) 37. . . . . . . . . . . . . . .
Inspection 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Carryover 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal for Inspection or Replacement 38. . . . .
Oil Specifications 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil System
Compressor 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining and Cleaning 33, 34. . . . . . . . . . . . . . . . .
Oil System Check 38. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air and Oil Discharge Temperature 38. . . . . . . . . .
Compressor Oil Inlet Temperature 38. . . . . . . . . .
Oil Cooler Oil Pressure Differential 38. . . . . . . . . .
Oil Cooler Temperature Differential 39. . . . . . . . . .
Oil Cooler Water Pressure Differential 39. . . . . . .
Oil Inlet Pressure 38. . . . . . . . . . . . . . . . . . . . . . . . .
Operation
Cold Ambient 31. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control System 19. . . . . . . . . . . . . . . . . . . . . . . . . . .
High Temperature 27. . . . . . . . . . . . . . . . . . . . . . . .
Lead–Lag, of Two Compressors 23. . . . . . . . . . . .
Piping, Control 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure and Temperature Digital Readouts 21. . . . .
Pressure Differential Gauging 38. . . . . . . . . . . . . . . . . .
Prestart–Up Instructions 15. . . . . . . . . . . . . . . . . . . . . . .
Air Filter 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coupling 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enclosure 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grounding 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Mode 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Piping 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13–8–606 Page vi
INDEX
System Pressure 16. . . . . . . . . . . . . . . . . . . . . . . . .
Programming Load–Unload Pressure Setpoints 21. .
Protective Devices
Blowdown Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . .
High Discharge Temperature 17. . . . . . . . . . . . . . .
Motor Protection Devices 17. . . . . . . . . . . . . . . . . .
Relief Valve 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separator Differential Pressure 17. . . . . . . . . . . . .
Recommended Lubricant 27. . . . . . . . . . . . . . . . . . . . . .
Regreasing Interval, Electric Motor 14. . . . . . . . . . . . .
Relief Valve 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remanufactured Air Ends i. . . . . . . . . . . . . . . . . . . . . .
Repair Parts, Ordering Instructions iii. . . . . . . . . . . . . .
Reservoir, Oil 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions 4–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Sealing, Lubrication and Cleaning 1. . . . . . . . . . . . . . .
Separator, Compressor (GD Eliminator) Oil 37. . . . . .
Separator Differential Pressure 17. . . . . . . . . . . . . . . . .
Separator/Trap, Moisture 10. . . . . . . . . . . . . . . . . . . . . .
SERVICE CHECK LIST, AIR FILTER 43. . . . . . . . . . .
Service Check List 43. . . . . . . . . . . . . . . . . . . . . . . . . . .
Every 1000 Hours Operation 43. . . . . . . . . . . . . . .
Every 125 Hours Operation 43. . . . . . . . . . . . . . . .
Every 6000 Hours Operation 43. . . . . . . . . . . . . . .
Every 8 Hours Operation 43. . . . . . . . . . . . . . . . . .
Every Year 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Lubrication 43. . . . . . . . . . . . . . . . . . . . . . . . .
Oil Separator 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications, Oil 27. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter/Control Box 19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto–Sentry S Controller with Keypad 19. . . . . . .
Emergency Stop Pushbutton 19. . . . . . . . . . . . . . .
Hourmeter 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTING & OPERATING PROCEDURES,
SECTION 3 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting the Unit 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Cold 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Hot 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOP/RESET Button with LED 19. . . . . . . . . . . . . . . .
Stopping the Unit 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature, High Discharge 17. . . . . . . . . . . . . . . . . .
TROUBLE SHOOTING, SECTION 9 44. . . . . . . . . . . .
Trouble Shooting, Oil Carry–Over 45. . . . . . . . . . . . . .
Valve
Blowdown 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Pressure/Check 19. . . . . . . . . . . . . . . . .
Relief 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Last Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water–Cooled Units, Location 9. . . . . . . . . . . . . . . . . .
Wiring, Electrical 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13–8–606 Page vii
LIST OF ILLUSTRATIONS
Figure 1–1 Compressor Cycle 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–2 Starter Box 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–3 Package – Controller & Starters 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–4 Package – Drive Motor & Air Filter 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–5 Package – Oil Filter, Oil Level Gauge, Mixing Valve, Minimum Pressure Valve & Check Valve 3.
Figure 1–6 Package – Air/Oil Flow Diagram 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1 Typical Compressor Room 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2 Air Flow Chart 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–3 Cold Weather Installation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4 Inlet Line Lengths 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5 Heat Exchanger (Oil Cooler) Approximate Water Flow 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–6 Aftercooler Approximate Water Flow 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–7 Series Piping 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–8 Parallel Piping 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–1 Control Schematic 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2 Inlet Valve 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–3 Minimum Pressure/Check Valve 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–4 Definition of Error Messages 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–5 Pressure Chart 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–6 Subtractive Pilot (Closed) 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–7 Subtractive Pilot (Opened) 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–8 Maximum Setpoints for Auto–Sentry S Controller, PSIG 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–9 Auto–Sentry S Solid State Control Touch Pad 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–10 Wiring Diagram – Dual Control 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–1 Flow Diagram 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–2 Oil Flow Diagram – Remote Overhead Mounted 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–3 Cooler Drain Detail 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–4 Oil Level Gauge 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–5 Oil Change Interval 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–6 Approximate Oil System Capacities 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–7 Compressor Oil Filter 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–8 Thermostatic Mixing Valve Element 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–9 Water Control Valve 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–10 Dew Point Temperature vs. Ambient Temperature, (100% Relative Humidity) 37. . . . . . . . . . . . . .
Figure 5–11 Oil Separator 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1 Heavy Duty Air Filter 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7–1 Installation of Coupling Cushions 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13–8–606 Page 1
SECTION 1
GENERAL INFORMATION
FIGURE 1–1 – COMPRESSOR CYCLE
COMPRESSOR – The Gardner DenverRcompres-
sor is a single stage, positive displacement rotary ma-
chine using meshing helical rotors to effect compres-
sion. Both rotors are supported between high capacity
roller bearings located outside the compression cham-
ber. Single width cylindrical roller bearings are used at
the inlet end of the rotors to carry part of the radial
loads. Tapered roller bearings at the discharge end lo-
cateeachrotoraxially andcarryallthrust loadsandthe
remainder of the radial loads.
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 six (6) matching helical grooves
60_apart to allow meshing with main rotor lobes.
Theairinletportislocatedontopofthecompressorcyl-
inder near the drive shaft end. 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 cycle begins as
the rotors unmesh at the inlet port and air is drawn into
the cavity between the main rotor lobes and the sec-
ondary rotor grooves (A). When the rotors pass the in-
let port cutoff, air is trapped in the interlobe cavity and
flows axially with the meshing rotors (B). As meshing
continues, more of the main rotor lobe enters the sec-
ondary rotor grove, normal volume 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 cavityfollowsthe same “fill–com-
press–discharge” cycle in rapid succession to produce
a discharge air flow that is continuous, smooth and
shock free.
AIR FLOW IN THE COMPRESSOR SYSTEM
(FIGURE 5–1, page 28) – Air enters the air filter and
passesthrough the inlet unloader valve andon into the
compression chamber where oil is injected into the air.
Aftercompression,theair/oilmixturepassesintotheoil
reservoirwhere mostof the entrainedoil is removedby
velocity change and impingement and drops back into
the reservoir. The air and remaining oil then passes
through the air/oil separator. The air then passes
through the minimum pressure/check valve, the after-
coolerand the moisture separator and intothe plant air
lines.
LUBRICATION, COOLING AND SEALING – Oil is
forcedbyair pressurefromthe oilreservoir throughthe
oil cooler, thermostatic mixing valve, and oil filter and
discharge into the compressor main oil gallery. A por-
tion of the oil is directed through internal passages to
the bearings and shaft oil seal. The balance of the oil
is injected directly into the compression chamber to re-
move heat of compression, seal internal clearances
and lubricate the rotors.

13–8–606 Page 2
FIGURE 1–2 – STARTER BOX
FIGURE 1–3 – PACKAGE – CONTROLLER & STARTERS
FIGURE 1–4 – PACKAGE – DRIVE MOTOR & AIR FILTER

13–8–606 Page 3
FIGURE 1–5 – PACKAGE – OIL FILTER, OIL LEVEL GAUGE, MIXING VALVE,
MINIMUM PRESSURE VALVE & CHECK VALVE
FIGURE 1–6 – PACKAGE – AIR/OIL FLOW DIAGRAM
203EDF797
(Ref. Drawing)

13–8–606 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 loosenor removetheoil fillerplug, drainplugs, covers, thethermostat-
icmixingvalve orbreakany connections,etc.,in thecompressorair oroilsys-
tem until the unit is shut down and the air pressure has been relieved.
DElectrical shock can and may be fatal.
DCompressor unit mustbe grounded inaccordance with theNational 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 the main disconnect switch, tag and lockout before working on the con-
trol.
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.

13–8–606 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, or
local regulations)
DDonot exceed the rated maximum pressure values shown on thenameplate.
DDo not operate unit if safety devices are not operating properly. Check peri-
odically. Never bypass safety devices.

13–8–606 Page 6
DECALS
206EAQ077 212EAQ077
218EAQ077
211EAQ077 207EAQ077

13–8–606 Page 7
DECALS
216EAQ077
217EAQ077
222EAQ077
221EAQ077 208EAQ077

13–8–606 Page 8
SECTION 2
INSTALLATION
GENERAL– On receipt of the unit, check for anydam-
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 – Proper lifting and/or transporting
methodsmust beusedtopreventdamage.Liftingslots
areprovidedinthebasefortowmotoruse.Theunitmay
also be moved into location by rolling on bars.
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.Failure to 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,
wheneverpossible,in aclean,well–lighted,well–venti-
lated area with ample space all around for mainte-
nance.Selectalocationthatprovidesa cool,clean,dry
source of air. In some cases it may be necessary to
install the air filter at some distance from the compres-
sor to obtain proper air supply.
Both the air–cooled and water–cooled units require
coolingairaswellasairtothecompressorinlet.Proper
ventilation MUST be provided; hot air must be ex-
hausted from the compressor operating area. A typical
inlet–outlet air flow arrangement is shown in
FIGURE 2–1.
Air–Cooled Units – A combination oil/aftercooler is
suppliedasstandardequipmentonallair–cooledunits.
The air–cooled unit with the standard enclosure re-
quires sufficient flow, FIGURE 2–2, page 9, for the
compressoroil/aftercoolingsystemandforelectricmo-
tor cooling. Air is drawn into the unit at the motor side
ofthe enclosure andis exhausted atthe oil coolerside.
Do not block the air flow to and from the unit. Allow
three and one–half (3–1/2) feet (1.1 M) to the nearest
obstruction on the starter end and control box end of
the unit. Allow three (3) feet (.9 M) to the nearest ob-
struction above and on other sides of unit. For continu-
ous efficiency, oil cooler cores must be periodically
cleaned with either vacuum or compressed air. If wet
cleaning is required, shield motor and spray on a mild
soap solution and flush with clean water.
FIGURE 2–1 – TYPICAL COMPRESSOR ROOM

13–8–606 Page 9
* 80_F (27_C) Inlet Air
Minimum Air Flow* For Compression
And Cooling – Cubic Feet/Minute
(Cubic Meters/Minute)
HP (KW) Air Cooled Water Cooled
60 – 100 HP 12,500 1,700
(45 – 75 KW) (354) (48)
FIGURE 2–2 – AIR FLOW CHART
For aluminum oil coolers, do not use
any cleaning solution that is not com-
patible with aluminum.Use ofimprop-
er solution may result in damage to
the cooler.
Water–Cooled Units –The water–cooled unit with the
standard enclosure requires sufficient air flow,
FIGURE 2–2, page 9, for electric motor cooling. Air is
drawnintothe unitat thetopof theenclosure andis ex-
hausted at the motor side. Do not block air flow to and
fromunit. Allow three and one–half (3–1/2)feet (1.1 M)
tothenearestobstructiononthestarterendandcontrol
box side of the unit. Allow three (3) feet (.9 M) to the
nearest obstruction above and on other sides of the
unit.
FOUNDATION – The G–D Rotary Screw compressor
requires no special foundation, but should be mounted
on a smooth, solid surface. Whenever possible install
theunitnearlevel.Temporaryinstallationmaybemade
at a maximum 10oangle lengthwise or 10_sidewise.
Mounting bolts are not normally required. However,
installation conditions such as piping rigidity, angle of
tilt, or danger of shifting from outside vibration or mov-
ing vehicles may require the use of mounting bolts and
shims to provide uniform support for the base.
OIL RESERVOIR DRAIN – The oil drain is piped from
thebottomofthereservoirtothe sideoftheframe.This
drainis approximately4.50 inches (115mm) abovethe
floor level. If this is not sufficient to conveniently drain
the oil some other methods of providing drain are:
1. Elevate the compressor unit on a suitable struc-
ture to obtain the desired drain height.
If the compressor unit base is raised
above floor level, the space between
the floor and the base bottom must be
closed with solid material all around
to prevent recirculation of hotair from
the oil cooler end and over tempera-
ture operation.
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.
ENCLOSURE – The compressor, electric motor, oil
cooler and aftercooler are mounted inside the enclo-
sure. Service doors are provided for maintenance ac-
cess. Be sure to allow enough space around the unit
for the doors to open completely.
Any of the enclosure doors may be removed by open-
ing the door and lifting it up slightly to disengage the
hinges.
Do not operate the compressor with
the fan and coupling guard removed.
Exposed fan and belts may cause
injury to personnel.
The motor inspection/air filter service panel is held by
two latches and lifts away from the enclosure. The air
outletpanel isattached by screwsto theenclosure and
is not readily removeable.
INSTALLATION FOR COLD WEATHER OPERA-
TION (FIGURE 2–3, page 10) – It is recommended
that the unit be installed inside a shelter that will be
heated to temperatures above freezing (32_F, 0_ C).
This will eliminate many of the problems associated
with operating units in cold climates where freezing
rain, drifting snow, freezing condensate and bitter cold
temperatures are 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-

13–8–606 Page 10
FIGURE 2–3 – COLD WEATHER INSTALLATION
(2.4 M)
vironment. The following are general guidelines for
outside installations:
Cold Weather (Down To +10_F, –12_C)
1. Be sure all drains, traps, and control lines, includ-
ing pressure transducer lines are heated to avoid
freezing of condensate. Heat tape with thermo-
stat control is generally satisfactory for this pur-
pose and can be obtained at various local plumb-
ing or hardware outlets at nominal cost.
2. If an air–cooled aftercooler is to be used, provi-
sions to bypass the aftercooler must be made.
Since cold air contains very little moisture, suc-
cessful operation can be achieved without the af-
tercooler.
3. Provideatleastsomesimplesheltersuchasaply-
wood windbreak to protect against drifting snow.
4. Use only Gardner DenverRAEONt9000 SP lu-
bricant.
5. Monitor the unit carefully during start–up and op-
eration to be sure it is functioning normally.
6. Specify NEMA 4 enclosure for electrical devices.
Extreme Cold Weather Operation (Down To –40_F,
–40_C)
In addition to the above, the following should be pro-
vided:
1. It will be necessary to provide shutters or to block
off part of the cooler in some manner since the
cooler is greatly oversized for operation in these
low temperatures. Since shutters are not pro-
vided as a factory option, blocking off a portion of
the cooler with plywood should be satisfactory.
2. Auto operation should not be used in extreme en-
vironments.
3. Some means of providing heat during shutdown
should be provided. There are various methods
toaccomplishthis,butsinceopeningsarenotpro-
videdfor sump heaters, theuseof radiant heaters
is recommended. The heaters should be sized to
provide at least a +10_F (–12_C) environment for
coolers, motor and sump. FIGURE 2–3 shows
howthesemight belocatedina typicalinstallation
and sizes required.
Remember unsheltered (outside) installations should
be avoided where possible. Installation next to a
heated building where enough heat can be used to
keep the compressor room above freezing will save
many complications in the operation and installation of
the unit.
Refer to Engineering Data Sheet 13–9–411, available
from an authorized Gardner Denver distributor, for the
advantages of using the heat recovered from rotary
compressors. This heat recovery could easily pay for
an adequate shelter for the unit.
AUXILIARY AIRRECEIVER – Anauxiliary airreceiver
isnotrequiredifthepipingsystemislargeandprovides
sufficient storage capacity to prevent rapid cycling.
Whenused,anairreceivershouldbe ofadequatesize,
providedwithareliefvalveofpropersetting,apressure
gauge and a means of draining condensate.
MOISTURE SEPARATOR/TRAP – Since the unit is
equipped with a built–in aftercooler, a combination
moisture separator and trap is furnished with the unit.
A means of draining condensate will need to be pro-
vided for.

13–8–606 Page 11
Length of Inlet Line Diameter of Pipe Size
0 to 10 Feet (0 to 3 Meters) Same as Compressor Inlet Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 to 17 Feet (3 to 5 Meters) One Size Larger Than Inlet Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 to 38 Feet (5 to 11.5 Meters) Two Sizes Larger Than Inlet Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURE 2–4 – INLET LINE LENGTHS
CONTROL PIPING – Control piping is not necessary
since the Electra–ScrewRunit is factory wired and
piped for the control system specified.
INLET LINE – Where an inlet line is used between the
air filter and the compressor, it must be thoroughly
cleaned on the inside to prevent dirt or scale from en-
tering the compressor. If welded construction is
used, the line must be shot blasted and cleaned to
remove welding scale. In either case, the inlet line
must be coated internally by galvanizing or painting
withamoistureandoil–proofsealinglacquer. Uptoten
(10)feet(3meters)inlength,theinletlineshouldbethe
full size of the inlet opening on the compressor. If an
extra–longlineisnecessary, thepipesizeshouldbe in-
creased according to Inlet Line Length Chart
FIGURE 2–4.
HEAT EXCHANGER
Approx.
Water Temperature to Heat Exchanger Water Pressure
Gallons/minute Maximum Drop @ 90_F
Water Flow Water Temp.
HP Model 60_F. 70_F. 80_F. 90_F. GPM* PSI
60 HP EDFSKB 5.0 6.2 8.3 12.5 40.8 2.0
75 HP EDFSLB 6.9 8.6 11.5 17.2 40.8 1.5
100 HP EDHSMB 9.2 11.5 15.3 22.9 40.8 5.0
* Flows exceeding “Maximum Water Flow” will cause severe erosion and will void unit warranty.
FIGURE 2–5 – HEAT EXCHANGER (OIL COOLER) APPROXIMATE WATER FLOW
AFTERCOOLER
Approx.
Water Temperature to Heat Exchanger Water Pressure
Gallons/minute Maximum Drop @ 90_F
Water Flow Water Temp.
HP Model 60_F. 70_F. 80_F. 90_F. GPM* PSI
60 HP EDFSKB .8 1.0 1.4 2.1 26.0
75 HP EDFSLB 1.2 1.5 2.0 3.0 26.0
100 HP EDHSMB 1.7 2.1 2.8 4.1 26.0
* Flows exceeding “Maximum Water Flow” will cause severe erosion and will void unit warranty.
FIGURE 2–6 – AFTERCOOLER APPROXIMATE WATER FLOW
Less than 1 PSI
for any flow rate
shown in the table.

13–8–606 Page 12
* (OPTIONAL) WATER CONTROL VALVE AND WATER SHUTOFF VALVE MUST BE ORDERED SEPARATELY.
FIGURE 2–7 – SERIES PIPING FIGURE 2–8 – PARALLEL PIPING
Accessibility for inlet air filter servicing must be consid-
eredwhenrelocatingthefiltersfromtheunittoaremote
location.
DISCHARGESERVICELINE – The discharge service
line connection on both water–cooled and air–cooled
unitsismadeattherighthandcorneroftheunit,viewed
from the opposite end from control panel side. When
manifoldingtwoormorerotaryscrewunitsonthesame
line, each unit is isolated by the check valve in the unit
discharge line. If a rotary screw unit is manifolded to
anothercompressor,besuretheothercompressorhas
a check valve in the line between the machine and the
manifold. If a rotary screw and a reciprocating com-
pressor are manifolded together, an air receiver must
be located between the two units.
Discharge air used for breathing will
cause severe injury or death.
Consult filtration specialists for addi-
tional filtration and treatment equip-
ment to meet health and safety stan-
dards.
BLOWDOWN VALVE PIPING – The blowdown valve
isfittedwithamufflerforoperationindoors. Iftheinstal-
lation requires, the muffler may be removed and the
blowdownvalvepipedtotheoutsidewithapipesizethe
same as the blowdown valve outlet connection.
WATER PIPING (Water–Cooled Heat Exchanger
Models Only) – On machines equipped with water–
cooledheat exchangers,thewaterinletandoutletcon-
nections are located in the unit base flange on the left
side of the unit.
The water source should be capable of supplying up to
the maximum flow shown in FIGURE 2–5 and
FIGURE 2–6, page 11, at a minimum pressure of 40
psig (2.8 Bars); maximum allowable water pressure is
150 psig (10.3 Bars). The water flow rates shown are
approximateandaguideto sizingpiping,coolingtower
and other water system equipment.
Theheatexchangersystemisdesignedtooperatewith
water inlet temperatures from 60_to 90_F (16_to 32_
C) and a water outlet temperature not to exceed 110_F
(43_C). If water cooler than 60_F is used, high water
outlet temperatures (over 110_F, 43_C) will beexperi-
encedalongwithshortenedheatexchangerlifecaused
bytubefoulingandcorrosion. Ifwaterwarmerthan90_
F (32_C) is used, higher compressor oil inlet tempera-
tures and high water usage will result.
Most water systems will require control of impurities:
filtration, softening or other treatment. See “Compres-
sor Oil Cooler – Water–Cooled Heat Exchanger” for
more information on the water system.
SERIES PIPING (FIGURE 2–7) – Water flow must be
through aftercooler first for effective cooling of dis-
charge air and is so piped on the standard water–
cooled unit.