Gardner Denver ELECTRA-SAVER EBU99C Operating And Service Manual
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Gardner Denver ELECTRA-SAVER EBU99C Operating And Service Manual

Gardner Denver ELECTRA-SAVER EBU99C Operating And Service Manual

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13-9-666
GARDNER DENVER
®
Version: 01
November 14, 2003
ELECTRA-SAVER
ELECTRA-SAVER II
STATIONARY BASE-MOUNTED
COMPRESSOR
®
AUTOSENTRY
-- ES+ CONTROLS
DOMESTIC MODELS
EAQ99Q, EBQ99M - 125, 150 & 200 HP
EAU99Q, EBU99C - 200 HP
INTERNATIONAL MODELS
EAQ99R - 100, 125 & 150 HP
(75, 93 & 112 KW)
EBQ99N - 125 & 150 HP
(93, 112 KW)
OPERATING AND
SERVICE MANUAL

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Summary of Contents for Gardner Denver ELECTRA-SAVER EBU99C

  • Page 1 13-9-666 GARDNER DENVER ® Version: 01 November 14, 2003 ELECTRA-SAVER ELECTRA-SAVER II STATIONARY BASE-MOUNTED COMPRESSOR ® AUTOSENTRY -- ES+ CONTROLS DOMESTIC MODELS EAQ99Q, EBQ99M - 125, 150 & 200 HP EAU99Q, EBU99C - 200 HP INTERNATIONAL MODELS EAQ99R - 100, 125 & 150 HP (75, 93 &...

  • Page 2: Remanufactured Airends

    Authorized distributor service technicians are factory trained and skilled in compressor maintenance and repair. They are ready to respond and assist you by providing 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:...

  • Page 3: Foreword

    FOREWORD Gardner Denver Rotary 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.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS Maintain Compressor Reliability And Performance With Genuine Gardner Denver Compressor Parts And Support Services ..............ii Remanufactured Airends ........................ii Foreword............................iii Index..............................v List Of Illustrations ..........................vii Section 1, General Information......................1 Section 2, Installation..........................8 Section 3, Starting & Operating Procedures ..................19 Section 4, Controls &...

  • Page 5: Index

    Index Addition Of Oil Between Changes ....47 Inlet Line ............12 Aftercooler Piping.......... 45 Inlet Screen And Tube........59 Air Filter Element Life........59 Inlet Valve ............ 25 Air Filter Vacuum Switch ....... 27 Installation Air Filter, Heavy Duty (Standard)....58 General............8 Air Filter, Section 6........
  • Page 6 Operation Every 1000 Hours Operation ...... 63 High Temperature........41 Every 125 Hours Operation......63 Every 8 Hours Operation......63 Parallel Piping..........17 Every 8000 Hours Operation ...... 63 Piping Every Year ..........63 Series ............16 Motor Lubrication........63 Pressure Differential Gauging ......

  • Page 7: List Of Illustrations

    LIST OF ILLUSTRATIONS Figure 1-1 – Compression Cycle......................1 Figure 1-2 – Starter Box ........................2 Figure 1-3 – Control Box ........................2 Figure 1-4 – Compressor / Motor Side....................3 Figure 1-5 – Cooler / Reservoir Side ....................3 Figure 1-6 – Air/Oil Flow Diagram ......................4 Figure 2-1 –...

  • Page 8: Section 1, General Information

    GENERAL INFORMATION Figure 1-1 – COMPRESSION CYCLE COMPRESSOR - The Gardner Denver Rotary Screw compressor is a single stage, positive displacement rotary machine using meshing helical rotors to effect compression. Both rotors are supported between high capacity roller bearings located outside the compression chamber. Single width cylindrical roller bearings are used at the inlet end of the rotors to carry part of the radial loads.

  • Page 9: Figure 1-2 - Starter Box

    LUBRICATION, COOLING AND SEALING - Oil is forced by air pressure from the oil reservoir through the oil cooler, thermostatic mixing valve, and oil filter and discharges into the compressor main oil gallery. A portion of the oil is directed through internal passages to the bearings, gears and shaft oil seal. The balance of the oil is injected directly into the compression chamber to remove heat of compression, seal internal clearances and lubricate the rotors.

  • Page 10: Figure 1-4 - Compressor / Motor Side

    Figure 1-4 – COMPRESSOR / MOTOR SIDE 200EDM797-A (Ref. Drawing) Figure 1-5 – COOLER / RESERVOIR SIDE 13-9-666 Page 3...

  • Page 11: Figure 1-6 - Air/Oil Flow Diagram

    202EDM797 (Ref. Drawing) Figure 1-6 – AIR/OIL FLOW DIAGRAM 13-9-666 Page 4...
  • Page 12 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: DANGER Failure to observe these notices could result in injury to or death of personnel.
  • Page 13 DECALS 212EAQ077 206EAQ077 218EAQ077 211EAQ077 207EAQ077 13-9-666 Page 6...
  • Page 14 DECALS 216EAQ077 222EAQ077 217EAQ077 221EAQ077 208EAQ077 13-9-666 Page 7...

  • Page 15: Section 2, Installation

    SECTION 2 INSTALLATION GENERAL - On receipt of the unit, check for any damage that may have been incurred during transit. Report any damage or missing parts as soon as possible. CAUTION Do not electric weld on the compressor or base; bearings can be damaged by passage of current.

  • Page 16: Figure 2-2 - Air Flow Chart

    (.9 m) to the nearest obstruction above and on other sides of the unit. FOUNDATION - The Gardner Denver Rotary Screw compressor requires no special foundation, but should be mounted on a smooth, solid surface. Whenever possible install the unit near level. Temporary installation may be made at a maximum 10°...
  • Page 17 OIL RESERVOIR DRAIN - The oil drain is piped from the bottom of the reservoir to the side of the frame. This drain is approximately 4.50 inches (115 mm) above the floor level. If this is not sufficient to conveniently drain the oil some other methods of providing drain are: Elevate the compressor unit on a suitable structure to obtain the desired drain height.

  • Page 18: Figure 2-3 - Cold Weather Installation

    Provide at least some simple shelter such as a plywood windbreak to protect against drifting snow. Use only Gardner Denver AEON 9000 SP lubricant. Monitor the unit carefully during start-up and operation to be sure it is functioning normally.

  • Page 19: Figure 2-4 - Inlet Line Lengths

    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.
  • Page 20 When connecting two or more GD rotary screw units on a common manifold, each unit is isolated by the check valve in the unit discharge line. If a Gardner Denver rotary screw unit is connected to another compressor on a common manifold, be sure the other compressor has a check valve in the line between the machine and the manifold.

  • Page 21: Figure 2-5 - Heat Exchanger (Oil Cooler) Approximate Water Flow

    HEAT EXCHANGER (INTERNATIONAL) Water Temperature to Heat Exchanger (l/s) Approximate Water Maximum Pressure Drop @ 32° C Water Flow Water Temperature (l/s) * Model 16° C 21° C 27° C 32° C (bar) EAQ99R 1.41 2.52 EAQ99R, 1.26 1.89 2.52 Less than .15 bar for any EBQ99N flow rate shown in the table...
  • Page 22 WATER PIPING (Water-Cooled Heat Exchanger Models Only) - On machines equipped with water- cooled heat exchangers, the water inlet and outlet connections are located in the unit base flange on the left side of the unit. WARNING It is mandatory that any water cooled unit be installed in a shelter heated to temperatures above freezing (32°...

  • Page 23: Figure 2-7 - Series Piping

    305EAQ797-A (Ref. Drawing) Figure 2-7 – SERIES PIPING SERIES PIPING ( ) - Water flow must be through aftercooler first for effective cooling of Figure 2-7 discharge air and is so piped on the standard water-cooled unit. 306EAQ797-A (Ref. Drawing) Figure 2-8 –...
  • Page 24 PARALLEL PIPING ( , page 16) - A separate water control valve is required to control the Figure 2-8 discharge air temperature. If a remote (externally mounted) water-cooled aftercooler is piped in parallel with the heat exchanger, provide a separate water control valve for the aftercooler and pipe separate inlet water lines to both the aftercooler and heat exchanger.
  • Page 25 Wipe lubrication fitting clean and add grease with a hand-operated grease gun. Only enough grease should be added to replace the grease used by the bearing. Too much grease can be as harmful as insufficient grease. The grease cavity should be about 1/2 full. Leave the relief plug temporarily off.

  • Page 26: Section 3, Starting & Operating Procedures

    Compressor Oil - Check the oil level in the reservoir. Add oil only if the oil level gauge reads in the red “ADD OIL” range. Do not mix different type oils. Units are shipped filled with Gardner Denver AEON 9000 SP Lubricating Coolant which is suitable for the first 8000 hours under normal operating conditions.
  • Page 27 WARNING Failure to properly ground the compressor package could result in controller malfunction. Rotation - Check for correct motor rotation using “JOG MODE.” Compressor drive shaft rotation must be clockwise standing facing the compressor coupling. WARNING Operation with incorrect motor rotation can damage equipment and cause oil eruption from the compressor inlet.
  • Page 28 DANGER The compressor starts and stops automatically. Automatic restarting can cause injury or death. Open, lockout and tagout main disconnect and any other circuits before servicing the unit. STARTING THE UNIT - Observe the following starting procedures. Unit Cold - If the unit is a water-cooled heat exchanger model, open any manual water inlet valves wide open.

  • Page 29: Section 4, Controls & Instrumentation

    SECTION 4 CONTROLS & INSTRUMENTATION GENERAL DESCRIPTION - The Gardner Denver Rotary Screw compressor is prewired with all controls, motor, and starter for the voltage and horsepower at the time of ordering. It is necessary only to connect the compressor unit to the correct power supply and to the shop air line (and to the appropriate water supply if water-cooled).

  • Page 30: Figure 4-1 - Schematic Tubing Diagram

    CAUTION Never paint, lubricate or alter a relief valve. Do not plug vent or restrict discharge. WARNING Operation of the unit with improper relief valve setting can result in severe personal injury or machine damage. Ensure properly set valves are installed and maintained.

  • Page 31: Figure 4-2 - Blowdown Valve

    Figure 4-2 – BLOWDOWN VALVE Blowdown Valve (Figure 4-2) - This valve normally is used for control functions, but also serves to relieve reservoir pressure following a shutdown. The blowdown valve is a two-way solenoid valve which is piped into the oil reservoir outlet ahead of the minimum pressure valve. When the solenoid is de- energized, the valve opens and the coolant system is blown down.

  • Page 32: Figure 4-4 - Inlet Valve

    To service the valve make sure all pressure is relieved, disconnect the unit from the power supply, lockout and tagout, then unscrew the valve cap from the body. The internal parts will come out after the cap has been removed. Repair kits are available from your local authorized Gardner Denver distributor. 208EDM797-A (Ref.

  • Page 33: Figure 4-5 - Shuttle Valve

    Solenoid Valves IVC and IVO - These valves control position of the inlet valve in response to signals from the “AutoSentry” Controller. With both valves de-energized, the normally open IVC valve allows control pressure to the inlet piston to close the valve. If IVC only is energized, the inlet valve is held in its current position.

  • Page 34: Figure 4-6 - Turn Valve - Electra-Saver Only

    213ECM797-A (Ref. Drawing) Figure 4-6 – TURN VALVE – ELECTRA-SAVER ONLY Turn Valve (Electra-Saver only) (Figure 4-6)- The turn valve is a helical valve which, when rotated, opens and closes a series of ports cast into the compressor cylinder. When these ports are open, they direct some of the air which would otherwise be compressed back to the inlet, reducing both capacity and power consumption.
  • Page 35 Discharge Thermistor - This sensor is located directly in the compressor discharge. Its signal is used to monitor compressor temperature and shut down the compressor if a coolant problem is detected. Reservoir Thermistor - This sensor is located near the separator and is used to monitor temperature and shut down the compressor if high temperatures are detected.
  • Page 36 COMPRESSOR CAPACITY CONTROL - TURN VALVE UNITS ONLY The capacity of the compressor is controlled by the action of the turn valve and the compressor inlet valve. The turn valve controls compressor delivery to match demands of 40% to 100% of the compressor’s maximum capacity.

  • Page 37: Figure 4-7 - Control Schematic - Compressor Unloaded - Constant Speed Mode

    209EDM797-A (Ref. Drawing) Figure 4-7 – CONTROL SCHEMATIC – COMPRESSOR UNLOADED – CONSTANT SPEED MODE EBQ, & EBU UNITS ONLY...

  • Page 38: Figure 4-8 - Control Schematic - Compressor At Full Load - Constant Speed Mode

    211EDM797-A (Ref. Drawing) Figure 4-8 – CONTROL SCHEMATIC – COMPRESSOR AT FULL LOAD – CONSTANT SPEED MODE EBQ & EBU UNITS ONLY...

  • Page 39: Figure 4-9 - Control Schematic - Compressor Unloaded - Low Demand Mode Or Auto Mode

    213EDM797-A (Ref. Drawing) Figure 4-9 – CONTROL SCHEMATIC – COMPRESSOR UNLOADED – LOW DEMAND MODE OR AUTO MODE EBQ & EBU UNITS ONLY...

  • Page 40: Figure 4-10 - Control Schematic - Compressor At Full Load

    210EDM797-A (Ref. Drawing) Figure 4-10 – CONTROL SCHEMATIC – COMPRESSOR AT FULL LOAD EAQ & EAU UNITS ONLY...

  • Page 41: Figure 4-11 - Control Schematic - Compressor Fully Unloaded - Low Demand Mode Switch Off

    212EDM797-A (Ref. Drawing) Figure 4-11 – CONTROL SCHEMATIC – COMPRESSOR FULLY UNLOADED – LOW DEMAND MODE SWITCH OFF EAQ & EAU UNITS ONLY...

  • Page 42: Figure 4-12 - Control Schematic - Compressor Fully Loaded - Low Demand Mode Switch On

    214EDM797-A (Ref. Drawing) Figure 4-12 – CONTROL SCHEMATIC – COMPRESSOR FULLY LOADED – LOW DEMAND MODE SWITCH ON EAQ & EAU UNITS ONLY...

  • Page 43: Figure 4-13 - Wiring Diagram - Wye Delta

    300EDM546-A (Ref. Drawing) Figure 4-13 – WIRING DIAGRAM – WYE DELTA EBQ & EBU UNITS...

  • Page 44: Figure 4-14 - Wiring Diagram - Full Voltage

    Figure 4-14 – WIRING DIAGRAM – FULL VOLTAGE EBQ & EBU UNITS...

  • Page 45: Figure 4-15 - Wiring Diagram - Wye Delta

    301EAQ546-B (Ref. Drawing) Figure 4-15 – WIRING DIAGRAM – WYE DELTA EAQ & EAU UNITS ONLY...

  • Page 46: Figure 4-16 - Wiring Diagram - Full Voltage

    303EAQ546 (Ref. Drawing) Figure 4-16 – WIRING DIAGRAM – FULL VOLTAGE EAQ & EAU UNITS ONLY...

  • Page 47: Section 5, Lubrication, Oil Cooler, Oil Filter & Separator

    AEON lubricants are available through your authorized Gardner Denver compressor distributor. OIL SPECIFICATIONS - The factory fill compressor lubricant is Gardner Denver AEON 9000SP lubricating coolant which can be used for year-round operation. AEON 9000SP is a synthetic, extended life lubricant which can extend lubricant change intervals up to 4 times that of a petroleum based lubricant.
  • Page 48 HIGH TEMPERATURE OPERATION - Gardner Denver AEON 9000 SP lubricating coolant will operate at a sustained discharge temperature up to 210° F (99° C). When unusually high ambient air temperature is encountered, lubricant life will be shortened, see , page 49.

  • Page 49: Figure 5-1 - Dew Point Chart °F

    Dew-Point Temperature vs. Ambient Temperature (100% Relative Humidity) 100 psig 125 psig 150 psig 175 psig Ambient Temp. F Figure 5-1 – DEW POINT CHART °F Dew-Point Temperature vs. Ambient Temperature (100% Relative Humidity) 6.9 bar 8.6 bar 10.4 bar 12.1 bar Ambient Temp.

  • Page 50: Figure 5-3 - Flow Diagram - Air/Oil System

    203EDM797-A (Ref. Drawing) Figure 5-3 – FLOW DIAGRAM – AIR/OIL SYSTEM...

  • Page 51: Figure 5-4 - Oil Flow Diagram - Remote Overhead Mounted Cooler

    204EAQ797-A (Ref. Drawing) 205EDM797 (Ref. Drawing) Figure 5-4 – OIL FLOW DIAGRAM – REMOTE OVERHEAD MOUNTED COOLER 13-9-666 Page 44...

  • Page 52: Figure 5-5 - Cooler Drain Detail

    REMOTE MOUNTED ELEVATED COOLER ASSEMBLY PROCEDURE - The Compressor package will be built and tested with the coolers mounted on the package. On enclosed units, the fan motor will be disconnected after test and the vent fan motor connected in its place. The vent fan will be mounted in the enclosure.
  • Page 53 NOTICE When removing the cooling module from the package for remote operation, do not use the flexible coupling (when supplied) between the air/oil separator housing and the minimum pressure/check valve. The discharge piping from the air/oil separator housing should be piped into the minimum pressure/check valve, then into piping to the cooler, with a flexible connection between the minimum pressure/check valve and aftercooler to keep the weight of the piping off of the cooler.
  • Page 54 COLD AMBIENT OPERATION - See “Installation for Cold Weather Operation,” Section 2. ADDITION OF OIL BETWEEN CHANGES must be made when the oil level is in the red range on the gauge as read while the unit is on. To add oil, follow these steps: Be sure the unit is completely off and that no air pressure is in the oil reservoir.

  • Page 55: Figure 5-6 - Oil Level Gauge

    Operating conditions and the appearance of the drained oil must be surveyed and the oil change intervals planned accordingly by the user. Gardner Denver offers a free oil analysis program with AEON lubricants. The first sample from a new unit should be sent in after 100 hours.

  • Page 56: Figure 5-7 - Oil Change Interval

    Discharge AEON 4000 AEON 9000 SP Temperature Change Interval Change Interval 4000 hrs. 8000 hrs. Up to 180° F (82° C) 3000 hrs. 6000 hrs. 180° F to 190° F (82° C to 88° C) 2000 hrs. 4000 hrs. 190° F to 200° F (88° C to 93° C) 1000 hrs.

  • Page 57: Figure 5-8 - Approximate Oil System Capacities

    FILLING OIL RESERVOIR DANGER Air/oil under pressure will cause severe personal injury or death. Shut down compressor, relieve system of all pressure, disconnect, lockout and tagout power supply to the starter before removing valves, caps, plugs, fittings, bolts and filters. Be sure the unit is completely off and that no air pressure is in the oil reservoir.
  • Page 58 COMPRESSOR OIL FILTER ( , page 43) - This screw on oil filter is a vital part in maintaining a Figure 5-3 trouble-free compressor, since it removes dirt and abrasives from the circulated oil. The oil filter relief valve is integrated into the replaced oil filter element. CAUTION Improper oil filter maintenance will cause damage to equipment.

  • Page 59: Figure 5-9 - Thermostatic Mixing Valve Element

    COMPRESSOR OIL COOLER - RADIATOR TYPE ( , page 3) - The oil cooler motor and fan is Figure 1-5 mounted on the oil cooler module; air is exhausted through the oil cooler and away from the unit. Do not obstruct air flow to and from the oil cooler.

  • Page 60: Figure 5-10 - Water Control Valve

    WARNING It is mandatory that any water-cooled unit be installed in a shelter heated to temperatures above freezing (32° F, 0° C). Oil cooler malfunction may be traced by checking pressure at oil inlet and outlet. At normal operating air service pressure (65 psig to 150 psig, 4.5 bar to 10.3 bar) with the unit warm, a pressure drop of 3 psi to 15 psi (.2 bar to 1 bar) can be expected between the oil inlet and the oil outlet.
  • Page 61 WATER FLOW CONTROL VALVE FOR HEAT EXCHANGER (Optional Equipment) (Figure 5-10, page 53) - The water flow control valve is adjustable to compensate for varying water inlet temperatures and pressures and is to be mounted in the water outlet line after the oil cooler (Figure 5-3, page 43). Use the compressor discharge air temperature gauge on the instrument panel in setting the flow control valve.

  • Page 62: Figure 5-11 - Oil Separator

    Figure 5-11 – OIL SEPARATOR COMPRESSOR (GD ELIMINATOR) OIL SEPARATOR located in a separate housing, consists of a renewable cartridge-type separator element and provides the final removal of oil from the air stream (Figure 5-11). Oil impinging on the inside of the separator element drains directly back into the oil reservoir by gravity. Oil collected outside the element is returned through tubing to the compressor cylinder.
  • Page 63 CAUTION Using an oil separator element at excessive pressure differential can cause damage to equipment. Replace the separator when the "Change Separator" advisory appears. NOTICE A sudden drop of zero pressure differential or sudden heavy oil carryover may indicate a ruptured element. Inspection - After removal of separator element, shine a light inside the element to reveal areas of heavy dirt or varnish deposits or breaks (ruptures) in the element media.
  • Page 64 COMPRESSOR OIL SYSTEM CHECK - The following readings are based on ambient temperature of 80° F (27° C) for air-cooled oil cooler and 80° F (27° C) inlet water on water-cooled oil cooler, with the system in good condition. Compressor should be at operating temperature at the time of checks. One- half hour of loaded operation is usually sufficient to reach level-out operating temperatures.

  • Page 65: Section 6, Air Filter

    Filter Element - Service the air filter element when the ”CHANGE AIR FILTER” LED is illuminated. Clean every 50 to 150 operating hours depending on dust conditions. NOTICE Use only genuine Gardner Denver air filter elements on Gardner Denver compressor units. Genuine parts are available through your authorized Gardner Denver distributor.
  • Page 66 Inspect the element for ruptures or cracks in the pleated media; replace the element if any are found. Inspect the gasket on the bottom (outlet end) of the element; replace the entire element if the gasket is damaged. A spare element will keep down time to a minimum. Allow the element to air dry COMPLETELY.

  • Page 67: Section 7, Coupling

    SECTION 7 COUPLING Figure 7-1 – INSTALLATION OF COUPLING CUSHIONS DANGER Rotating machinery can cause personal injury or death. Turn the unit completely off, open the main disconnect, lockout and tagout before servicing the coupling. COUPLING - The motor and compressor are direct connected by a resilient type flexible coupling with a single cushion.
  • Page 68 ASSEMBLY OF COUPLING ONTO THE AIREND AND MOTOR (See Figure 7-1). NOTICE Elements with non-uniform cross sections must be mounted with the rotation arrow on the coupling the same direction as the rotation arrow on the airend. Incorrect rotation will greatly decrease the torque carrying capacity of the coupling.
  • Page 69 4. Check to see if element is centered between shaft ends. If element is centered, using the loctite supplied with the coupling, lock all set screws (must have loctite, supplied with the coupling, applied to set screws) to 50 ft-lbs. If element is not centered, unlock the set screws and slide coupling to center element between shaft ends and then, using the loctite supplied with the coupling, lock all set screws to 50 ft-lbs.

  • Page 70: Section 8, Maintenance Schedule

    SECTION 8 MAINTENANCE SCHEDULE SERVICE CHECK LIST Air Filter - Operating conditions determine frequency of service. If the “CHANGE AIR FILTER” message is displayed, air filter requires servicing or changing. See “Air Filter", Section 6. Oil Separator - Operating conditions determine frequency of service. If the “CHANGE SEPARATOR” message is displayed, the oil separator element requires changing.
  • Page 71 MAINTENANCE SCHEDULE Maintenance Action As Indicated by Every Every Every Every AutoSentry Every 8 1000 8000 * Year Controller Hours Hours Hours Hours • Change Air Filter ..............• Change Oil Separator ............• Check Reservoir Oil Level ..........• Check for Proper Load/Unload...........

  • Page 72: Section 9, Troubleshooting

    SECTION 9 TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE REMEDY Compressor fails to start Wrong lead connections. Change leads. Blown fuses in control Replace fuse. box. Motor starter overload Reset and investigate heaters tripped . cause of overload. Pressure in reservoir. Inspect blowdown valve. Read error message on Take appropriate action.
  • Page 73 SYMPTOM POSSIBLE CAUSE REMEDY Compressor starts too Wye Delta switch time set Contact your Champion slowly too long. distributor. Minimum Pressure/Check Repair or replace. Valve is faulty. Supply voltage is too low. Check the supply voltage. Compressor is low on Restricted air filter.
  • Page 74 NOTICE Gardner Denver factory remanufactured replacement compressor airend units are available from your authorized distributor, on an exchange basis, for all rotary screw compressor units. 13-9-666 Page 67...
  • Page 75 GENERAL PROVISIONS AND LIMITATIONS Gardner Denver (the “Company”) warrants to each original retail purchaser (“Purchaser”) of its new products from the Company or its authorized distributor that such products are, at the time of delivery to the Purchaser, made with good material and workmanship. No warranty is made with respect to: Any product which has been repaired or altered in such a way, in the Company’s judgment, as to affect the product adversely.
  • Page 76 For additional information contact your local representative or Gardner Denver Compressor and Pump Division, 1800 Gardner Expressway, Quincy, Illinois 62301 Customer Service Department Telephone: (800) 682-9868 FAX: (217) 224-7814 Sales and Service in all major cities. Specifications subject to change without notice.

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