Emerson VSG, VSSG manual Command Shaft Assembly Replacement, Command Shaft Seal Replacement

Page 87
Command Shaft Assembly

Section 5 • Maintenance/Service

Command Shaft Assembly

Replacement

REMOVAL

NOTE

The following steps can be used to remove or install either the capacity or volume command shaft assemblies.

1.Shut down and isolate compressor unit, see Compressor Unit Shutdown and Isolation procedure.

2.Remove actuator, see Actuator Assembly Replacement procedure.

3.Remove four socket head cap screws (457) and Nord-Lock washers (477) securing mounting plate (415) to manifold.

4.The command shaft and mounting plate may now be removed from the compressor.

INSTALLATION

5.Install the command shaft assembly with a new O-ring (446) on the manifold. Make sure that the command shaft tongue is engaged in the cross shaft slot. Rotate the bearing housing so the vent holes point down, this will prevent water and dust from entering the vents.

6.Install the actuator mounting plate with the four socket head cap screws and Nord-Lock washers se- curing it with proper torque.

7.Perform leak check, see Compressor Unit Leak Check procedure.

Command Shaft Seal Replacement

REMOVAL

1.Remove bolts (281) holding the shaft seal cover (218). Insert two of the bolts into the threaded jacking holes to assist in removing the cover. There will be a small amount of oil drainage as the cover is removed.

2.Remove the rotating portion of the shaft seal (219C).

3.Remove oil seal (230) from cover.

4.Remove the stationary portion of the shaft seal (219B) from the seal cover using a brass drift and hammer to tap it out from the back side of the seal

cover.

5.Seal with stationary carbon face (219B) and rotat- ing mirror face (219C).

Figure 5-29. Command Shaft Seal

INSTALLATION

CAUTION

Care must be taken when handling the shaft seal and mirror face so it is not damaged. Do not touch the carbon or mirror face as body oil and sweat will cause the mirror face to corrode.

NOTE

When replacing the stationary members of the seal on the VSSG 291 thru VSSG 601 the roll pin in the cover is used only with the seal assembly having a stationary mirror face. If a seal assembly with a stationary carbon face is installed, the roll pin must

be removed.

6.To install the carbon cartridge part of the seal in the seal cover; clean the seal cover, remove protective plastic from the carbon cartridge, do not wipe or touch the carbon face. Lubricate the sealing O-ring with clean compressor lubricating oil. If applicable, align the hole on the back of the carbon cartridge with the dowel pin in the seal cover. Install car- tridge using seal installation tool or similar (see tool lists).

7.Wipe clean, the compressor input shaft and the

VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG

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Contents VSG/VSSG compressor unit Installation, operation & maintenance manualPage VSG/VSSG Standard Vilter Warranty Statement Important Message READ CAREFULLY BEFORE INSTALLING AND STARTING YOUR COMPRESSORVilter Manufacturing LLC Section 1 General Information Table of ContentsSection 3 Installation Section TitleSection 4 Operation Section 5 Maintenance/ServiceSection 6 Troubleshooting Section NumberTable/Figure Section 7 Warranty and PartsList of Tables and Figures AppendicesFigure 3-12. Installation of Coolers - Next to Buildling Section 1 General Information How To Use This Manual Figure 1-1. Gas Compressor Unit Model Designation Section 1 General Information Gas Compressor Unit Model DesignationsSection 1 General Information System Unit Identification Section 1 General Information Compressor Unit Component IdentificationFigure 1-2. Gas Compressor Unit Components 1 of Figure 1-2. Gas Compressor Unit Components 2 of Figure 1-2. Gas Compressor Unit Components 3 of Section 1 General Information Component Identification ContinuedSection 1 General Information Piping & Identification Component Tags Symbols and Identifications Position Transmitter3-Way Thermostatic Valve High Side Float Valve Steady-Mount Bulb & Capillary 1 - 10 / Blank Figure 2-1. Gas Compressor Unit P&ID Section 2 Theory of OperationGas Flow Oil Life and Oil FlowRTDs and Pressure Transducers Control SystemThis is a continuous cycle Figure 3-1. Rigging and Lifting Points Section 3 InstallationDelivery Inspection Rigging and Lifting of Compressor UnitThe following are recommendations regarding long term storage Long Term Storage RecommendationsCompressor Unit Inspections Prior to Storage or Installation Recommended Onsite ToolsAIR COOLED OIL COOLERS Compressor has been placed in operation as of LONG TERM STORAGE LOGBuilding the Foundation FoundationFoundation Materials Considerations Prior to Startingof both Check the ability of the soil to carry the load Compressor Unit Installationrecommendations for setting, precautions, mixing, and Leveling and GroutingAdditional Information Codes and Standards COMPRESSOR UNIT HOUSEKEEPING PADS Figure 3-6. Housekeeping Pad Dimension Detail - Top View2 - # CLOSED TIES CENTER LINE 5 - # 6 VERT LEVEL010Ä5*4+0- 214176 4%1//0&& 14 175-2+0 10%46 $#5 PipingFy lbf Table 3-2. Maximum Allowable Flange LoadsNozzle Dia. in Fz lbfONE FAN DIAMETER NOT PREFERRED HOT AIR RECIRCULATION Figure 3-14. Cooler Placement and Spacing Figure 3-13. Discharge Elevation of CoolersPREFERRED Do not hydro test compressur unit. Failure to comply Pressure TestingInitial Oil Charging Using Non -Vilter Oils Unit Oil Charging and PrimingNormal Operating Level Maximum NON-Operating Level Minimum Operating LevelBypass Valve CLOSE OIL MIXINGSUCTION INLET VALVE OPENREMOTE Section 3 InstallationInitial Oil Charging Priming Remote Oil Cooler and PipingSUCTION INLET OIL FILTER OPENMOTOR Pre Start-Up Checklist Section 3 Installation Pre Start-Up15. Verify that all valves are in the open position Section 3 Installation Start-Up Dual Oil Filters Section 4 OperationOperation Oil InspectionCalibrate Slide Valve Actuators Control System CalibrationStopping/Restarting Starting, Stopping and Restarting the Compressor StartingFigure 4-2. Actuator Assembly Section 4 Operation Figure 4-5. Photo-chopper Figure 4-4. Slide Valve Calibration Screen Compact Logix PLCTable 4-1. Command Shaft Rotation Specifications Angle/Slide TravelCapacity 18. Press the “Set Max” button Oil Temperature Control Valve Oil Mixing Valve OperationFail Position Purging with Dry Nitrogen 10. Close discharge bleed valve while still purging Purging with Dry Gas Pressure IndicatorOIL SEPARATOR Section 4 Operation Figure 4-13. Suction Oil Charging Valve Figure 4-12. Suction Bypass Valve and Equalizing Solenoid Suction OilCoalescing Oil Return Line Setup Control Table 5-1. Maintenance/Service ScheduleOil Circuit UnitCompressor Unit Isolation for Section 5 Maintenance/ServiceMaintenance/Service Maintaining Proper OperationCompressor Unit Leak Check Send samples immediately to the oil analysis lab after Oil System Components Oil SamplingUse Vilter Oil Analysis Kit VPN 3097A to collect an oil sample for analysis. For an example, see Figure 5-2. FillOil Charging Oil Draining Oil Filter ReplacementSingle Oil Filter Assembly Dual Oil Filter AssemblyVent Valve Drain Valve Inlet Shut-Off Valves Coalescing Filter Replacement Coalescing FilterCentering Strap View From Back of Oil Pump Strainer Oil Pump StrainerDrive Coupling Form-Flex BPU Hub Installation Table 5-3. Shaft and Hub DistancesSize 17. Install set screw in hub cap to secure key in keyway of shaft Drive Center Member Installation and AlignmentTable 5-5. Disc Pack Installation Torque Specifications Table 5-4. Hub Clamp Bolt and Set Screw Torque SpecificationsAngular Alignment Drive Coupling Form-Flex BPU Center Member and Hub Removal Drive Coupling Type C Sure-Flex ReplacementTable 5-6. Clamping Bolts and Set Screw Torque Specifications Compressor ReplacementLock Washer Figure 5-11. Bearing Axial Float Inspection Compressor Shaft Bearing Float InspectionsFigure 5-13. Gate Rotor Float Gate Rotor Float and Gate Rotor Bearing Float InspectionTable 5-7. Maximum Bearing Float Figure 5-12. Bearing Radial Float InspectionGate rotor bearing float being measured Table 5-8. Gate Rotor FloatFigure 5-14. Gate Rotor Bearing Float Applied Force Rigidly attach dial indicator Use bolt for fulcurmFigure 5-15. Gate Rotor and Support Clearance - Minimum Clearances Section 5 Maintenance/Service Gate Rotor and Support ClearanceStraight Edge Straight Edge Straight Edge Figure 5-16. Gate Rotor and Support Clearance - MeasuringGate Rotor Support Gate Rotor Gate Rotor Support Gate Rotor Gate Rotor Support Gate RotorGate Rotor Assembly Replacement All VSG & VSSG Compressors Except VSG 301-701 CompressorsTable 5-9. Gate Rotor Tool Sets Figure 5-18. Gate Rotor Assembly Removal Figure 5-17. Gate Rotor Assembly Removal and ToolsFigure 5-20. Gate Rotor and Shelf Clearance Figure 5-19. Gate Rotor Assembly and ToolsFigure 5-21. Gate Rotor Assembly Breakdown Gate Rotor Assembly Replacement VSG 301-701 Compressors ONLYFigure 5-22. Gate Rotor Thrust Bearing Figure 5-23. Gate Rotor and Shelf ClearanceGate Rotor Disassembly Figure 5-25. Gate Rotor Blade InstallationFigure 5-24. Gate Rotor Blade Assembly Figure 5-26. Gate Rotor Thrust Bearing Figure 5-27. Thrust Bearing InstallationFigure 5-28. Roller Bearing Assembly Slide Valve Actuator Assembly ReplacementCommand Shaft Assembly Replacement Command Shaft Seal ReplacementFigure 5-29. Command Shaft Seal Figure 5-30. Command Shaft Seal Installation Table 6-1. Slide Valve Actuator Troubleshooting Guide 1 of Section 6 TroubleshootingProblem SolutionTable 6-1. Slide Valve Actuator Troubleshooting Guide 2 of Flash Pattern MeaningTable 6-2. Slide Valve Actuator LED Blink Codes* 1 of not the loss of 24V power during calibration, possible causes are er before the calibration procedure was completed. The actuatorwill not move while this error code is displayed. To clear the error calibrate the actuator. If this error has occurred and the cause wasTable 6-3. Troubleshooting Guide - General Problems & Solutions 1 of Table 6-3. Troubleshooting Guide - General Problems & Solutions 2 of Table 6-3. Troubleshooting Guide - General Problems & Solutions 3 of 6 - 8 / Blank Warranty does not cover labor and extraneous expenses Section 7 Warranty and PartsWarranty Claim Processing On Site Service SupportRequest a “VSG Single Screw Compressor Rebuild Form” Remanufactured Gas Bare Shaft Compressor ProcessAppendix A Torque Specifications Torque Specifications ft-lbsTorque Specifications for 17-4 Stainless Steel Fasteners ft-lbs Appendix B Motor Compressor - General Storage Instructions No Action Required Appendix C Oil Analysis ReportEvaluation PRODUCT ANALYSIS REPORTAppendix D Recommended Header Piping Appendix E Recommended Remote Air Cooled Oil Cooler Piping OUTLET ON TOPINLET ON BOTTOM Blank
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