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Gardner Denver VST110 Operating And Service Manual

Ariable speed two-stage stationary base-mounted compressor
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13-17-605
Version: 10
May 27, 2014
VARIABLE SPEED
TWO-STAGE
STATIONARY BASE-MOUNTED
COMPRESSOR
AirSmartä CONTROLLER
MODELS
VST110, 150, 180A
110-150-180kW
60HZ
OPERATING AND
SERVICE MANUAL
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Summary of Contents for Gardner Denver VST110

  • Page 1 13-17-605 Version: 10 May 27, 2014 VARIABLE SPEED TWO-STAGE STATIONARY BASE-MOUNTED COMPRESSOR AirSmartä CONTROLLER MODELS VST110, 150, 180A 110-150-180kW 60HZ OPERATING AND SERVICE MANUAL...

  • Page 2: Maintain Compressor Reliability And Performance With Genuine Gardner Denver Compressor Parts And Support Services

    Reliability in materials and quality assurance is incorporated in our genuine replacement parts. Your authorized Gardner Denver Compressor distributor offers all the backup you’ll need. An AirSmart network of authorized distributors provides the finest product support in the air compressor industry.

  • Page 3: Warning - Prohibition - Mandatory Label Information

    WARNING – PROHIBITION – MANDATORY LABEL INFORMATION 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 Indicates a hazard with a medium level of risk which, if not avoided, COULD result in death or serious injury. Asphyxiation Hazard – Poisonous Fumes or Toxic Gases in Compressed Air Indicates a hazard with a low level of risk which, if not avoided, MAY result in a minor or moderate injury.

  • Page 5: Safety Precautions

    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.

  • Page 6: Table Of Contents

    TABLE OF CONTENTS Maintain Compressor Reliability And Performance With Genuine Gardner Denver Compressor Parts And Support Services ............................. 1 Instructions For Ordering Repair Parts ..................... 1 Warning – Prohibition – Mandatory Label Information ................2, 3 Safety Precautions ..........................4 Index ...............................

  • Page 7: Index

    INDEX Air Filter ............57 Oil Filter ............47 Air Filter, Section 7 .........57 Oil Reservoir Drain ......... 16 Air Flow In The Compressor System ....8 Oil System Air-Cooled Units, Location ......15 Addition Of Oil Between Changes ....45 Auxiliary Air Receiver........17 Compressor ..........

  • Page 8: List Of Illustrations

    LIST OF ILLUSTRATIONS Figure 1-1 – Compression Cycle ......................8 Figure 1-2 – Package Illustration (Air-Cooled) – External Details ............10 Figure 1-3 – Package Illustration (Air-Cooled) – Internal Details ............. 11 Figure 1-4 – Package Illustration (Water-Cooled) – External Details ............12 Figure 1-5 –...

  • Page 9: Section 1, General Information

    GENERAL INFORMATION Figure 1-1 – COMPRESSION CYCLE COMPRESSOR – Your Gardner Denver Rotary Screw package is fitted with two (2) in-series single stage, positive displacement rotary compressors using meshing helical rotors to effect compression. Each pair of rotors is supported between high capacity anti-friction bearings located outside the compression chamber.
  • Page 10 LUBRICATION, COOLING AND SEALING (Figure 4-3, page 33) - Oil is forced by differential pressure from the oil reservoir through the oil cooler, thermostatic mixing valve/oil filter combination, distribution manifold, and enters the compressors and inter-stage manifold. A portion of the oil is directed to internal passages, on both 1st and 2nd stage airends, to lubricate the bearings and shaft oil seals.

  • Page 11: Figure 1-2 - Package Illustration (Air-Cooled) - External Details

    300VST804 - B (Ref. Drawing) Page 1 of 2 Figure 1-2 – PACKAGE ILLUSTRATION (AIR-COOLED) – External Details...

  • Page 12: Figure 1-3 - Package Illustration (Air-Cooled) - Internal Details

    300VST804-B (Ref. Drawing) Page 2 of 2 Figure 1-3 – PACKAGE ILLUSTRATION (AIR-COOLED) – Internal Details...

  • Page 13: Figure 1-4 - Package Illustration (Water-Cooled) - External Details

    301VST804-B (Ref. Drawing) Page 1 of 2 Figure 1-4 – PACKAGE ILLUSTRATION (WATER-COOLED) – External Details...

  • Page 14: Figure 1-5 - Package Illustration (Water-Cooled) - Internal Details

    301VST804 - B (Ref. Drawing) Page 2 of 2 Figure 1-5 – PACKAGE ILLUSTRATION (WATER-COOLED) – Internal Details...

  • 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. Do not electric weld on the compressor or base; bearings can be damaged by passage of current.

  • Page 16: Figure 2-1 - Typical Compressor Room

    LOCATION - The compressor package shall be installed, whenever possible, 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 cases it may be necessary to install duct work to reach a source of adequate cooling air, or to direct cooling air in and out of the compressor package to prevent re- circulation (e.g., not cooling the air entering the fresh air inlet).
  • Page 17 Do not block flow of air entering or exiting the enclosure - allow 3-1/2 feet (1.1 m) clearance to the nearest obstruction all around and on top. FOUNDATION - The Gardner Denver Rotary Screw compressor requires no special foundation, but should be mounted on a smooth, solid surface and as near level as possible. Temporary installation may be made at a maximum 10°...

  • Page 18: Figure 2-2 - Inlet Line Lengths

    MOISTURE SEPARATOR/TRAP - Since the unit is equipped with a built-in aftercooler, a combination moisture separator and drain valve are furnished with the unit. CONTROL PIPING - Control piping is not necessary since the Gardner Denver compressor package is factory wired and piped for the control system specified.
  • Page 19 DISCHARGE SERVICE LINE - The discharge service line connection on both water-cooled and air- cooled units is located at the center roof area of the enclosure. Gardner Denver compressor packages are inherently isolated from the service line by their own minimum pressure/check valves. Installer or end user must ensure that other compressors that are piped into a common pipe manifold with the Gardner Denver compressor package are each provided with an isolation check valve.

  • Page 20: Figure 2-3 - Package Maximum Current Consumption Summary

    (VFD’s) to control compressors and cooling fan motors. The indicated Gardner Denver guidelines for proper wiring, grounding, and feed power conditioning must be followed in order to protect the VFD electronics. Failure to do so will void your warranty.

  • Page 21: Figure 2-4 - Line Reactor Sizing Recommendations

    Existing line reactor not properly sized – see Figure 2-4, page 20. · Other large loads on the same power feed as the compressor. GD Model Volts VFD HP RATINGS Max KVA VST110 400/480 2-100 HP / 10 HP 1000 VST150 400/480 2-125 HP / 10 HP...

  • Page 22: Section 3, Starting & Operating Procedures

    – typical level is middle of gauge under running conditions. Do not mix different type oils. When the unit is shipped, it is filled with Gardner Denver AEON™ 9000TH lubricating coolant, suitable for the first 8000 hours under normal operating conditions.
  • Page 23 Figure 4-4 thru Figure 4-11, pages 34 thru 41, for general wiring diagrams and Section 2, page 14 for installation instructions. Grounding - Equipment must be properly grounded according to Gardner Denver Guidelines for proper wiring, grounding and feed power conditioning.
  • Page 24 Operation with incorrect motor rotation can damage equipment and cause oil eruption from the compressor inlet. When checking motor rotation, induce minimum rotation (less than one revolution if possible). Never allow motor to reach full speed. The compressor unit’s direction of rotation must be checked every time the compressor is reconnected to the power supply.
  • Page 25 The Target Pressure is the second item in the Operation Adjustment sub-menu so press the Down button to navigate to the Target Pressure setting. OPERATION ADJUSTMENT TARGET PRESSURE 100 PSI (SELECT PARAMETER) To change the Target Pressure, press the Enter button to edit the value.
  • Page 26 Setting the Unload and Load Pressure After setting the Target Pressure, set the Unload and Load Pressures values in a similar fashion. The Unload pressure is the third item in the Operation Adjustment sub-menu so press the Down button to navigate to the Unload Pressure setting. The Unload Pressure will control at which pressure the compressor unload and stops.
  • Page 27 Unit Hot - Start-up instructions are the same as that of a cold start. DAILY CHECK - Refer to Section 14, page 73 “Maintenance Schedule”. STOPPING THE UNIT - Press “STOP-RESET” button. The oil reservoir will automatically blow down, as the motors are de-energized.
  • Page 28 Operation of the unit with improper pressure relief valve setting can result in severe personal injury or machine damage. Ensure properly set valves are installed and maintained. 13-17-605 Page 27...

  • Page 29: Section 4, Controls & Instrumentation

    SECTION 4 CONTROLS & INSTRUMENTATION GENERAL DESCRIPTION - The Gardner Denver rotary screw compressor package is pre-wired with all electrical components suitable for the voltage and horsepower at time of order. It is necessary only to connect the compressor unit to the correct power supply and to the shop air supply network - and to the appropriate water supply if using the water-cooled variant.

  • Page 30: Figure 4-1 - Electrical Enclosure Hardware

    The drives and motors are designed to operate with 3ph-60Hz-460Vac electrical powers, which must be installed in accordance with local (site) Electrical Code requirements. 300VST810 -H (Ref. Drawing) Page 1 of 2 Item Description Item Description Control Assembly Fuse Holder Variable Frequency Drive Fuse Variable Frequency Drive (Air-Cooled only)

  • Page 31: Figure 4-2 - Electrical Enclosure Hardware

    300VST810 -H (Ref. Drawing) Page 2 of 2 Item Description Key Pad Emergency Stop Operator Contact Block Decal Figure 4-2 – ELECTRICAL ENCLOSURE HARDWARE 13-17-605 Page 30...
  • Page 32 Fan VFD and Motors - The radial fan providing cooling air for the heat exchangers is driven by an inverter-duty (TEFC) electric motor, which in turn is energized by a pulse-width modulated, variable frequency drive (commonly referred to as VFD). This combination of components enables the controller to match the heat exchanger coolant needs in proportion with load level (e.g., flow capacity) of the compressor package, thus saving fan power.
  • Page 33 Inlet Feed Valve (C) - This (three-way solenoid) device supplies/vents the required pneumatic signal to actuate the poppet valve. When energized, it vents the air signal from the inlet poppet valve, allowing it to open and when de-energized, it supplies the air signal to the inlet poppet valve, forcing it closed. Note that this pilot operated valve requires 37 to 40 psig pressure, at its intake port, to achieve its normally open position (de-energized).

  • Page 34: Figure 4-3 - Piping And Instrumentation Illustration

    300VST797-B (Ref. Drawing) Figure 4-3 – PIPING AND INSTRUMENTATION ILLUSTRATION...

  • Page 35: Figure 4-4 - Wiring Diagram - (Air-Cooled) Two-Stage Vs Control

    Figure 4-4 – WIRING DIAGRAM – (AIR-COOLED) Two-Stage VS Control 300VST546-C (Ref. Drawing) Page 1 of 4...

  • Page 36: Figure 4-5 - Wiring Diagram - (Air-Cooled) Two-Stage Vs Control

    300VST546-C (Ref. Drawing) Page 2 of 4 Figure 4-5 – WIRING DIAGRAM – (AIR-COOLED) Two-Stage VS Control...

  • Page 37: Figure 4-6 - Wiring Diagram - (Air-Cooled) Two-Stage Vs Control

    300VST546-C (Ref. Drawing) Page 3 of 4 Figure 4-6 – WIRING DIAGRAM – (AIR-COOLED) Two-Stage VS Control...

  • Page 38: Figure 4-7 - Wiring Diagram - (Air-Cooled) Two-Stage Vs Control

    300VST546-C (Ref. Drawing) Page 4 of 4 Figure 4-7 – WIRING DIAGRAM – (AIR-COOLED) Two-Stage VS Control...

  • Page 39: Figure 4-8 - Wiring Diagram - (Water-Cooled) Two-Stage Vs Control

    301VST546-C (Ref. Drawing) Page 1 of 4 Figure 4-8 – WIRING DIAGRAM – (WATER-COOLED) Two-Stage VS Control...

  • Page 40: Figure 4-9 - Wiring Diagram - (Water-Cooled) Two-Stage Vs Control

    301ETK546-C (Ref. Drawing) Page 2 of 4 Figure 4-9 – WIRING DIAGRAM – (WATER-COOLED) Two-Stage VS Control...

  • Page 41: Figure 4-10 - Wiring Diagram - (Water-Cooled) Two-Stage Vs Control

    301VST546-C (Ref. Drawing) Figure 4-10 – WIRING DIAGRAM – (WATER-COOLED) Two-Stage VS Control Page 3 of 4...

  • Page 42: Figure 4-11 - Wiring Diagram - (Water-Cooled) Two-Stage Vs Control

    301VST546-C (Ref. Drawing) Page 4 of 4 Figure 4-11 – WIRING DIAGRAM – (WATER-COOLED) Two-Stage VS Control...

  • Page 43: Section 5, Compressor Lubrication - Separation, Filtration And Controls

    AEON 9000TH lubricant is available through your authorized Gardner Denver compressor distributor. OIL SPECIFICATIONS - The factory fill compressor lubricant is Gardner Denver AEON 9000TH lubricating coolant for all-year-round operation. This is a polyol ester (POE) synthetic lubricant specially formulated for high operating temperatures (210°F to 225°F), which can extend change intervals up to 4...
  • Page 44 Use of improper lubricants will cause damage to equipment. Do not mix different types of lubricants or use inferior lubricants. All materials used in Gardner Denver compressor units are compatible with AEON 9000TH Synthetic Lubricating Coolant. Use caution when selecting downstream components such as lubricating bowls, gaskets and valve trim.

  • Page 45: Figure 5-1 - Oil Level Sight Glass

    OIL SIGHT GLASS - This device indicates oil level within the air/oil reservoir – See Figure 5-1 for details. Figure 5-1 – OIL LEVEL SIGHT GLASS To ensure best performance from the oil separation system, adhere to the following guidelines: ·...
  • Page 46 (e.g., very dusty, high humidity, etc.), may require more frequent oil changes. Gardner Denver offers a free oil analysis program with our AEON 9000TH lubricant. The first sample from a new unit should be sent in between 40-100 hours of operation.
  • Page 47 DRAINING AND CLEANING OIL SYSTEM - Always drain the complete system. Draining when the oil is hot will help to prevent varnish deposits and carry away impurities. To drain the system, use one of the following methods: Be sure the unit is completely off and that no air pressure is in the oil reservoir. Disconnect, lockout and tagout the power supply to the compressor package.
  • Page 48 (e.g., oil cooler, compressors, and oil filter) a much larger volume of oil will be required. The VST110-180 package requires nearly 25 gallons of AEON 9000TH Synthetic Lubricating Coolant to fill all the lines and components. The provided sight glass has a working height of 4”, which represent a change of 5.3 gallons between its bottom edge (refill level) to its upper edge (max fill level).

  • Page 49: Figure 5-3 - Combination Oil Filter And Thermostatic Mixing Valve

    6. Press the oil filter assembly into the housing, and using the 1” socket, tighten down until the o-rings seat within the housing. Do not over tighten. 7. After the compressor is started and pressurized, inspect housing-to-element joint for leaks. OIL MIXING VALVE –...

  • Page 50: Figure 5-4 - Pressure Dew Point Of Compressed Air

    The aim of the stepped oil flow modulation is to maintain optimal 1st and 2nd stage compressor discharge temperatures (between 195°F and 220°F). The AirSmart controller governs the oil flow control valve operations – refer to AirSmart Manual 13-17-600 for detailed information on programmed operations of these valves.

  • Page 51: Figure 5-5 - Oil Coalescing Element

    OIL SEPARATION RESERVOIR / COALESCING ELEMENTS - These devices serve multiple functions in the compressor package: · Air/oil centrifugal separation - The bulk of the liquid oil is separated, by centrifugal effects, away from the compressed air and aerosol streams, which is then gravity-collected at the bottom of the reservoir.
  • Page 52 Using oil separator elements at excessive pressure differential can cause damage to equipment. Replace the elements when the "Change Separator" advisory appears. A sudden drop to zero pressure differential or sudden heavy oil carryover may indicate a ruptured element. Oil Coalescing Element Service – Use the following procedures to replace or inspect the element: Be sure the unit is completely off and that oil pressure is depressurized.

  • Page 53: Section 6 - Heat Exchangers (Oil, Air), Axial Cooling Fans

    SECTION 6 HEAT EXCHANGERS (OIL, AIR), AXIAL COOLING FANS Compressor, air/oil reservoir, separator chamber and all piping and tubing may be at high temperature during and after operation. Do not attempt inspection or cleaning of air-cooled heat exchangers until cooling fan has stopped rotating. Disconnect, lockout and tagout package from power supply.

  • Page 54: Figure 6-1 - Air Flow Chart

    6300 Figure 6-1 – AIR FLOW CHART All the required hardware, mechanical and electrical connections have been made at the Gardner Denver factory, thus the only regular maintenance required is to keep the exterior core fins free from dirt and other airborne debris per the following procedure: Air-cooled heat exchanger cores are fabricated from aluminum.

  • Page 55: Figure 6-2 - Cooler Housing Side Covers

    Figure 6-2 – COOLER HOUSING SIDE COVERS Automatic restarting or electrical shock can cause injury or death. Disconnect, lockout and tagout package from the power supply. AXIAL COOLING FANS 1. Follow the Lock-Out Tag-Out procedures to de-energize the package. Allow adequate time for the VFD capacitors to fully discharge before beginning maintenance.

  • Page 56: Figure 6-3 - Water-Cooled Heat Exchanger Coolant Requirements

    All the required hardware, mechanical and electrical connections have been made at the Gardner Denver factory. Regular maintenance is required to keep the interior core areas free from dirt and other fowling agents.
  • Page 57 Figure 6-4 – WATER CONTROL VALVE Adjustments – The regulator valve shall be adjusted so that it closes when the cooling water entering and exiting the package are at the same temperature – a condition that is present after the compressors have stopped and the heat exchangers have cooled down.

  • Page 58: Section 7, Air Filter

    In turn, the longevity of the filter element depends on the cleanliness of the local environment. 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 59 Never operate the unit without the air filter element. Never use elements that are damaged, ruptured or wet. Keep spare elements on hand to reduce downtime. Store elements in a protected area free from damage, dirt and moisture. Handle all parts with care. Filter Element Inspection and Replacement: 1.

  • Page 60: Section 8, Shaft Coupling

    SECTION 8 SHAFT COUPLING Figure 8-1 – COUPLING COMPONENTS Rotating machinery can cause personal injury or death. Turn the unit completely off, open the main disconnect, lockout and tagout before servicing the coupling. SHAFT COUPLING – Main motors drive their companion compressors by means of curved jaw-type couplings.

  • Page 61: Figure 8-2 - Coupling Element

    Figure 8-2 – COUPLING ELEMENT · Apply a thread-locking compound to the hub set screws (M10 size) and tighten to 150.5 lb-in (17 N-m) of torque. Reinstall coupling guard with provided fasteners. For hub-to-shaft interference fit hubs, main drive motor removal is necessary. 13-17-605 Page 60...

  • Page 62: Figure 8-3 - Motor Removal Hardware

    300ETK810-C (Ref. Drawing) Figure 8-3 – MOTOR REMOVAL HARDWARE · Remove coupling guard by removing four bolts · Remove two bolt/nut/washer combos securing [main motor] rear support to base frame. · Insert temporary support between adaptor casting and support frame (e.g., wood beam) to maintain compressor level when main motor is retrieved.
  • Page 63 Interference-fitted Coupling Hub Installation and Removal – In the event that a coupling hub has to be removed, please note that these are designed to fit on compressor and motor shafts with a transitional interference fit. Coupling hubs and their companion shafts which have bore diameter which fall in the interference range of the design fit, must be installed or removed with the air of a pulling tool and/or heat dilation.
  • Page 64 Make sure to use suitable heat protective gloves and clothes. If heat was applied to the [compressor] coupling hub during its removal, there is the possibility that the companion shaft seal has been damaged and it must be replaced. Contact Gardner Denver for further instructions. 13-17-605 Page 63...

  • Page 65: Figure 8-4 - Coupling Installation Tool Kit

    Figure 8-4 – COUPLING INSTALLATION TOOL KIT Figure 8-5 – COUPLING REMOVAL TOOL KIT 13-17-605 Page 64...

  • Page 66: Section 9, Minimum Pressure/Check Valve

    If the valve fails to function, check the valve stem O-ring for sealing, valve orifices for restriction, or valve and valve seat for burrs and dirt. Repair kits are available from your local authorized Gardner Denver distributor. Before servicing the minimum pressure valve, always stop the unit, release air pressure, lockout and tagout the power supply to the compressor package.

  • Page 67: Figure 9-1 - Minimum Discharge Pressure/Check Valve

    Figure 9-1 – MINIMUM DISCHARGE PRESSURE/CHECK VALVE 13-17-605 Page 66...

  • Page 68: Section 10, Inlet Control Valve

    SECTION 10 INLET CONTROL VALVE INLET CONTROL VALVE – This device is located at the intake flange of the compressor. During compressor stoppage, planned or accidental (e.g. power failure), it blocks off the compressor intake and allows it to remain pressurized and ready for quick re-start. A spring-loaded check feature is provided as added insurance against air or oil backflow During compressor operation, the underside of the poppet is vented to atmosphere via a 3-way solenoid valve, allowing the poppet to fall (open) and feed fresh air to the compressor inlet-the spring loaded check...
  • Page 69 3. Close (when provided) valve isolating compressor package from air system. 4. Identify (by position) each tube connected to the valve body and remove. 5. Remove four bolts (Item 13) securing valve body to compressor body and remove valve. 6. Inspect poppet seal (O-Ring) (Item 6, 10) for wear and tear. Replace, if necessary. 7.

  • Page 70: Figure 10-2 - Inlet Control Valve (Actuator)

    Figure 10-2 – INLET CONTROL VALVE (ACTUATOR) 13-17-605 Page 69...
  • Page 71 Inlet Control Valve (Actuator) Inspection: The actuator does not require maintenance and is permanently lubricated at the factory with non-silicone grease. If air/oil leaks develop or abnormal (e.g., slow motion) performance is noted in spite of proper feed pressure then the complete actuator must be replaced: 1.

  • Page 72: Section 11, Pressure Relief Valve

    SECTION 11 PRESSURE RELIEF VALVE Pressure Relief Valve - This device protects the pressure-containing components of the compressor package against pressures accidentally exceeding 200 psig. It is installed on the dry-side of the oil separation reservoir. Figure 11-1 – PRESSURE RELIEF VALVE 13-17-605 Page 71...
  • Page 73 Before inspecting the pressure relief valve, release air pressure, lockout and tagout the power supply to the compressor package. Failure to release pressure or properly disconnect the power may result in personal injury or death. Never paint, lubricate or alter a relief valve. Do not plug vent or restrict. Operation of the unit with improper relief valve setting can result in severe personal injury or machine damage.

  • Page 74: Section 12, Ventilation Fans, Filters (Electrical Enclosure)

    SECTION 12 VENTILATION FANS, FILTERS (ELECTRICAL ENCLOSURE) Ventilation Fans/Filters - The electronics housed in the standard IP54 enclosure box are ventilated by a combination of triple intake and discharge side air filters and a single roof-mounted axial fan. Refer to Figures 1-4 and 4-1, pages 12 and 29 in their corresponding Sections of this manual, for details.

  • Page 75: Section 13, Motor Lubrication

    SECTION 13 MOTOR LUBRICATION Rotating machinery can cause injury or death. Open main disconnect, lockout and tagout power supply to compressor package before working on the electric motor. Motor Lubrication - Long time satisfactory operation of an electric motor depends in large measure on proper lubrication of the bearings.

  • Page 76: Section 14, Maintenance Schedule

    SECTION 14 MAINTENANCE SCHEDULE SERVICE CHECK LIST Daily Checks: · Air Filters (Compressor) - Replace when controller displays “CHANGE AIR FILTER” message. Refer to Section 7, page 55 for air filter details. · Oil Separator Element - Replace when controller displays “CHANGE OIL SEPARATOR ELEMENT”. Refer to Section 5, page 42 for oil separator element details.
  • Page 77 Yearly Checks: · Heat Exchangers (air and water-cooled) – Check cooling performance of air and oil cores – see Section 6, page 50 of this manual for details on typical performance expectations as well as recommended cleaning procedures. · Pressure Relief Valve – Check operation of device – see Section 11, page 69 for test procedure. ·...

  • Page 78: Section 15, Troubleshooting

    13-17-600. Remote Contact is open Replace switch or jumper. Compressor lock-up Confirm compressor shaft is not free to turn, then call Gardner Denver for further instructions. See “High Discharge Air Temperature”, this section. Compressor See “High Discharge Air High discharge temperature starts but Temperature,”...
  • Page 79 Restriction in service piping Inspect and clean service piping. Restriction in control tubing Inspect and clean control tubing. Compressor Acceleration time in VFD set too Contact your Gardner Denver starts too long distributor. slowly Minimum Pressure/Check Valve is Repair or replace.
  • Page 80 SYMPTOM POSSIBLE CAUSE REMEDY Excessive oil See “Oil Carryover” in this section. Oil separation malfunction consumption Oil leaks at fittings and gaskets Detect and correct oil leaks. Shaft seal leaking Inspect or replace shaft seal. High discharge Thermostatic mixing valve stuck on Inspect or replace valve.
  • Page 81 Ruptured oil separator element. Replace element. Loose assembly Tighten all fittings and gaskets. Foam caused by use of Use Gardner Denver AEON 9000TH incorrect oil oil only. Minimum pressure valve Repair or replace. malfunction – discharge pressure below 80 psig...
  • Page 84 For additional information, contact your local representative or visit: www.contactgd.com/compressors ©2014 Gardner Denver, Inc. Printed in U.S.A.

This manual is also suitable for:

Vst150Vst180a

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