Name: Emerson Vilter VSS
Brand: Emerson
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Section 8 • Spare Parts List

VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD

Vilter parts get renewed from time to time, so be sure to ask if the part listed in your manual is still the best for your compressor.

Parts that appear on diagrams might be shown separately for reference, but are sold as an assembly or kit only.

8 − 13

Main Rotor

ITEM DESCRIPTION

MODEL NUMBER

QTY VSS 2401 VSS 2601 VSS 2801 VSS 3001

ROTOR ASSEMBLY 1 A25226AN A25226AM A25226AL A25226AK

102 SHIM PACK 1 A25177G A25177G A25177G A25177G

*VSS 2401 thru VSS 3001 Only

Standard Vilter™ Warranty Statement3
Important Message5
EC Declaration of Incorporation6
- Table of Contents7
- Section 1 • General Information15
How to Use this Manual15
Additional Important Notes15
Refrigeration Compressor Unit Model Designations16
System Unit Identification17
Compressor Unit Component Identification18
Figure 1-1. Refrigeration Compressor Unit Components18
Instrument Identification Letters21
Symbols Identification23
Major Component Identification23
Control and Instrument Identification24
Line Type Designations24
Valve and Instrument Tagging25
Equipment Number Identification25
Pipe Line Data Identification26
- Section 2 • Theory of Operation27
Refrigerant Flow27
Oil Life and Oil Flow27
Oil Cooling28
- Water Cooled Oil Cooling28
- Liquid Injection Oil Cooling28
- V-Plus Oil Cooling28
- Thermosyphon Oil Cooling28
Control System29
- Temperature Elements, Pressure Transmitters and Indicators29
- Section 3 • Installation31
Figure 3-1. Rigging and Lifting Points (VSS-2101 Compressor Unit Shown)31
Delivery Inspection31
Rigging and Lifting of Compressor Unit31
Compressor Unit Inspections Prior to Installation32
Recommended On-Site Tools32
Long Term Storage Recommendations33
- Compressor Motor33
- Long Term Storage Log34
Foundation35
- Considerations Prior to Starting35
- Foundation Materials35
- Building the Foundation35
- Compressor Unit Installation36
- Figure 3-2. Concrete Pad with Compressor Unit Dimensions - Side View36
- Leveling and Grouting37
- Figure 3-3. Concrete Pad with Compressor Unit Dimensions - Front View37
- Figure 3-4. Interior Foundation Isolation37
- Additional Information38
- Operation and Performance38
- General Design Requirements38
- Figure 3-5. Foundation with Housekeeping Pads Dimensions - Top View38
- Figure 3-6. Housekeeping Pad Dimension Detail - Top View39
- Figure 3-7. Level Compressor Unit Using Top Surface of Spherical Washers39
- Figure 3-8. Concrete Pad Housekeeping Detail40
Figure 3-9. Stop/Check Valve Orientation41
Stop/Check Valve Installation41
Piping42
Table 3-1. Maximum Allowable Flange Loads43
Figure 3-10. Maximum Allowable Flange Loads43
Flange Loads43
Figure 3-11. Recommended Remote Air Cooled Oil Cooler Piping44
Remote Air-Cooled Oil Cooler Piping44
Electrical Connections45
- Field Wiring Instructions45
Testing Refrigeration System for Leaks48
- Ammonia Systems48
- Halocarbon Refrigerant Systems48
- CO2 Systems49
Evacuating the System49
Notice on Using Non-Vilter Oils50
Unit Oil Charging and Priming50
- Unit Initial Oil Charging51
- Priming Oil Lines and Compressor51
System Refrigerant Charging52
- Low Side Equipment52
- Compressors52
- Condensers52
- Controls52
- Initial High Side Charging52
Notice on Using Non-Vilter Oils55
Operation55
Oil Inspection55
Section 4 • Operation55
Dual Oil Filters56
Control System56
- Calibration56
- Starting, Stopping and Restarting the Compressor56
- Emergency Shutdown57
Slide Valve Actuator Operation57
Calibrate Slide Valve Actuators (for Units Using Vission20/20™)58
Table 4-1. Command Shaft Rotation Specifications62
Calibrate Slide Valve Actuators (for Units Using Compact Logix PLC)64
Compressor Control with Vission20/20™ Micro-Controller (no Slide Operation)69
Coalescing Oil Return Line Setup70
Suction Equalizing Line Setup - for VSS/VSM Compressors71
Dual Oil Filter Setup for Oil Filters with Filter Head Assemblies72
Table 4-2. Stop/Check Valve Open Positions73
Stop/Check Valve Operation73
Maintenance and Service Schedule - for VSS/VSM Unit Only75
Section 5 • Maintenance/Service75
Maintenance and Service Schedule - for VSH/VSSH Unit Only76
Preventive Maintenance, Checks and Services78
- Daily78
- Weekly78
- Monthly78
- Trimonthly78
- Annually78
Compressor Unit Isolation for Maintenance/Service (Compressors with Slide Valves)79
Recommendations When Servicing (Compressors Without Slide Valves)80
Preparation of Unit for Servicing80
Compressor Unit Leak Check after Servicing81
Oil System Components81
- Oil Sampling81
- Oil Draining85
- Oil Charging86
- Filter Element Replacement (Single Oil Filter Assembly) and Oil Pump Strainer Servicing87
- Filter Element Replacement (Duplex Oil Filter Assembly)90
  - Removal90
- Filter Element Replacement (Dual Oil Filter Assembly)90
- Oil Separator Coalescing Filter Replacement95
  - Removal95
  - Installation95
- Oil Separator Heater Cartridge Replacement97
Drive Coupling Hub (Form-Flex BPU) Installation98
- Straight Bore Hubs98
- Tapered Bore Hubs98
- Table 5-4. Shaft and Hub Distances98
Table 5-5. Hub Clamp Bolt and Set Screw Torque Specifications99
Table 5-6. Disc Pack Installation Torque Specifications99
Drive Center Member Installation and Alignment99
Drive Coupling Hub (Form-Flex BPU) and Center Member Removal101
Drive Coupling (Type C Sure-Flex) Replacement101
- Removal101
- Installation102
Coupling Guard Replacement103
- Removal103
- Installation103
Compressor Replacement104
- Removal104
- Installation105
Table 5-8. Bareshaft Compressor Component Weights105
Table 5-9. Bareshaft Compressor Component Lifting Hole Sizes105
Bareshaft Compressor Lifting Points and Weights105
Bareshaft Compressor Center of Gravity (Models 291-2101)107
Bareshaft Compressor Center of Gravity (Models 2401-3001)108
Compressor Inspection109
- Compressor Shaft Bearing Clearance Inspections109
- Gaterotor Bearing Inspection111
- Table 5-11. Maximum Gaterotor Bearing Clearance111
- Gaterotor Inspection112
- Additional Inspections116
- Post Inspection116
Gaterotor Assembly Replacement (All Compressors Except VSM 301-701 & VSM 97-127 Compressors)116
- Removal116
- Table 5-14. Gaterotor Tool Kits116
- Installation117
Gaterotor Assembly Replacement (VSM 301-701 Compressors Only)120
- Removal120
- Installation120
Gaterotor Assembly Replacement (VSM 97-127 Compressors Only)122
- Removal122
- Installation122
Gaterotor Disassembly (All Compressors Except VSM 97-127 Compressors)124
- Gaterotor Blade Removal124
- Gaterotor Blade Installation125
- Gaterotor Thrust Bearing Removal125
- Gaterotor Thrust Bearing Installation125
- Gaterotor Roller Bearing Removal126
- Gaterotor Roller Bearing Installation126
Gaterotor Disassembly (VSM 97-127 Compressors Only)127
- Gaterotor Blade Removal127
- Gaterotor Blade Installation127
- Gaterotor Thrust Bearing Removal128
- Gaterotor Thrust Bearing Installation128
- Gaterotor Roller Bearing Removal128
- Gaterotor Roller Bearing Installation128
Compressor Shaft Seal Replacement129
- Shaft Seal Assembly129
- Handling Seal Face with Care129
- Compressor Shaft Seal Replacement - for VSS/VSM Units130
- Compressor Shaft Seal Replacement - for VSH/VSSH Units132
Slide Valve Actuator Assembly Replacement137
- Removal137
- Installation137
- Actuator Installation Using Anti-Rotation Bolts138
Slide Valve Command Shaft Assembly Replacement139
- Removal139
- Installation139
Liquid Injection Control Valve Station140
Table 5-17. Coils for Solenoid Valves (ICFE)141
Table 5-18. Parts for Motorized Valve Station (ICF)141
Table 5-19. Torque Specifications (Ft-Lbs)142
Main Rotor Assembly142
Torque Specifications142
Nord-Lock ® Washers143
Using a Torque Wrench Correctly143
Table 6-1. Slide Valve Actuator Troubleshooting Guide (1 of 3)145
Section 6 • Troubleshooting145
Table 6-2. Slide Valve Actuator LED Blink Codes (1 of 2)148
Table 6-3. Troubleshooting Guide - General Problems & Solutions (1 of 3)150
Slide Valve Actuator Troubleshooting Guide151
Warranty Claim Processing153
Section 7 • Warranty and Parts153
On-Site Service Support155
Remanufactured Bare Shaft Single Screw Compressor Process155
- Explanation of Rebuild Levels155
- Bare Shaft Compressor Description155
Section 8 • Spare Parts List157
- Gaterotor160
- Shaft Seal167
- Main Rotor168
- Slide Valve Cross Shafts and End Plate170
- End Plate (VSS 2401 - VSS 3001 Only)172
- Slide Valve Carriage Assembly174
- Miscellaneous Frame Components178
- Miscellaneous Frame Components Tubing and Fittings181
- Replacement Tools184
- Replacement Parts185
- Gaterotor Assembly188
- Shaft Seal190
- Main Rotor191
- Slide Valve Carriage Assembly194
- Miscellaneous Frame Components197
- Housing Accessories199
- Replacement Tools200
- Kits203
Appendix A Torque Specifications205
Appendix B Vilter Oil207
Appendix C Vibration Measurements - Single Screw Compressor211
- Wiring the ICAD223
- Troubleshooting228
- The Manual Tool228
- Service Parameters228
- Alarms229
- Common Questions230

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Brand	Emerson
Model	Vilter VSS
Category	Air Compressor
Language	English