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Single Screw Compressor PLC Operation Manual •Vilter/Emerson • 35391CM
Table of Contents
Section Title Section Number
VSG/VSSG Standard Vilter Warranty Statement .....................................................................................i
Important Message................................................................................................................................ii
Section 1 • General Information
How To Use This Manual .........................................................................................................................1-1
Glossary of Terms ...................................................................................................................................1-2
Hardware Components .......................................................................................................................... 1-6
Wiring Requirements .............................................................................................................................1-9
VFD Installation Recommendations .......................................................................................................1-10
Section 2 • Operation Descriptions
Overview ...............................................................................................................................................2-1
Operational Descriptions and Diagrams .................................................................................................2-2
Starting of the Compressor/Permissives.....................................................................................2-2
Compressor Start-up Sequence ..................................................................................................2-3
Auto Start-Stop ..........................................................................................................................2-4
Anti-Recycle ..............................................................................................................................2-4
Capacity Slide Control ................................................................................................................2-4
Operating Modes .......................................................................................................................2-8
Load Limits and Forced Unloading..............................................................................................2-8
VFD Capacity Control .................................................................................................................2-10
Volume Slide Control .................................................................................................................2-10
Safeties ......................................................................................................................................2-10
Emergency Stop ........................................................................................................................2-10
Oil Heaters ................................................................................................................................. 2-11
Suction Oil Injection Solenoid ....................................................................................................2-11
Suction-Discharge Equalizing Solenoid ......................................................................................2-11
Oil Drain Solenoid ......................................................................................................................2-11
2-Way Oil Mixing Valve ..............................................................................................................2-12
Oil Injection Valve ...................................................................................................................... 2-12
Air Cooled Oil Cooler (VFD Type) ................................................................................................2-13
Oil Cooler Temperatures ............................................................................................................2-13
Oil Cooler Standby Heater ..........................................................................................................2-13
Air Cooled Aftercooler (VFD Type) ..............................................................................................2-14
Air Cooled Condenser (VFD Type)...............................................................................................2-15
Evaporative Condenser (VFD Type) ............................................................................................2-15
Air Cooled Oil Cooler (Step Type) ...............................................................................................2-16
Air Cooled Aftercooler (Step Type) .............................................................................................2-17
Air Cooled Condenser (Step Type) ..............................................................................................2-17
Water Cooled Gas Aftercooler ....................................................................................................2-18
Water Cooled Condenser ...........................................................................................................2-19
Liquid Injection Valve ................................................................................................................. 2-20
VPLUS Liquid Injection Pump ..................................................................................................... 2-21
Discharge Recycle Valve .............................................................................................................2-22
Economizer Solenoid(s) ............................................................................................................. 2-23
Hotgas Bypass Solenoid ............................................................................................................. 2-23
Venturi Oil Recovery ..................................................................................................................2-23
Gas Scrubbers ............................................................................................................................2-23
Building Enclosure Devices .........................................................................................................2-24
Periodic Slide Valve Exercise .......................................................................................................2-24
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