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Vission 20/20 micro-controller
Operation and service manual
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Table of Contents Section Title Section Number How To Use This Manual ....................................................................................................................TOC-8 Section 1 • Operational Flow Charts Requirements to Start Compressor ...................................................................................................1-1 Critical Compressor Run Logic at Compressor Start ...........................................................................1-1 Compres
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Table of Contents Section Title Section Number Section 4 • Main Screen Overview ..........................................................................................................................................4-1 Figure 4-1. Digital I/O Board Layout...................................................................................................4-1 Top Status Bar ............................................................................................................................
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Table of Contents Section Title Section Number Section 10 • Compressor Sequencing Overview ..........................................................................................................................................10-1 Pressure Control Setpoints ................................................................................................................10-1 Figure 10-1. Compressor Sequencing Screen ................................................................................
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Table of Contents Section Title Section Number Section 16 • Event List Overview ..........................................................................................................................................16-1 Event list Columns .............................................................................................................................16-1 Figure 16-1. Event List Screen .................................................................................................
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Table of Contents Section Title Section Number Section 20 • Data Backup Overview ..........................................................................................................................................20-1 Save / Load ........................................................................................................................................20-1 Figure 20-1. Data Backup Screen - Save/Load ...............................................................................
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List of Tables and Figures Table/Figure Page Number Table 3-1. Digital I/O .........................................................................................................................3-3 Table 3-2. Analog Inputs....................................................................................................................3-5 Table 3-3. Analog Outputs.................................................................................................................3-7 Table 3-4. An
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List of Tables and Figures Table/Figure Page Number Figure 19-4. Configuration Screen - Page 4 ........................................................................................19-7 Figure 19-5. Configuration Screen - Page 5 ........................................................................................19-8 Figure 19-6. Configuration Screen - Page 6 ........................................................................................19-9 Figure 20-1. Data Backup Screen - Save/L
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How to Use This Manual This manual contains instructions for the Vission 20/20 CAUTION - Caution statements are shown when there Operation & Service Manual. It has been divided into 25 are potentially hazardous situations, if not avoided, will sections. result in damage to equipment. Section 1: Operational Flow Charts NOTE - Notes are shown when there are addtional infor- mation pertaining to the instructions explained. Section 2: Installation Recommendations Section 3: Hardware Architecture N
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Section 1 • Operational Flow Charts Requirements to Start Compressor Volume and Oil Separator Temp Filter Diff Press < Capacity slides are >Oil Sep Start Trip Start Filter Diff Trip less than 5% Setpt Setpt Oil Pump On: Prelub Oil Press is > Prelub Oil Press Reset Setpt for “Min Compressor Prelub Timer” Start Compressor setting (typically 5 seconds) Critical Compressor Run Logic at Compressor Start Start Compressor Is Is “Oil Press Run Oil Press> Run Oil Press> Bypass at Comp Run Oil Press
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Section 1 • Operational Flow Charts Suction Pressure Override Load Limit During Temperature Control Is Suction Press < Capacity Increase Suct Press Cap Yes Disabled Dec OFF Setpt? No Is Suction Press < Decrease compressor capacity until Suction Yes Suct Press Cap Press > Suction Press Cap Decrease ON setpoint. Dec ON Setpt? Normal Loading and No Unloading Figure 1-1. Operational Flow Charts (2 of 2) Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 1 – 2
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Section 2 • Installation Recommendations Electro-Magnetic Interference (EMI). The Vilter Proper Wiring Sizing Vission 20/20 should be isolated with its own con- • Always size wire gauges as specifi ed by the National trol transformer for the most reliable operation, see Electrical Code (NEC) for electronic control devices. Figure 2-1. Vission 20/20 with Individual Transformer. • For improved noise immunity, install one size larger • Connecting the Vilter Vission 20/20 to breaker panels wire
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Section 2 • Installation Recommendations Each voltage level must be run in separate conduit: Grounding • Continuous grounds must be run from the util- • 460 VAC ity ground to the Vission 20/20, see Figure 2-3. • 230 VAC Grounding. • 120 VAC • Grounds must be copper or aluminum wire. • 24 VAC • Never use conduit grounds. DC signals Mixing Voltages • If your installation site has wire-ways or conduit trays, • Separate different voltages from each other and dividers must be installed between the
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Section 2 • Installation Recommendations Wiring Methods • Each Vission 20/20 panel should have its own indi- vidual control transformer, see Figure 2-5. Correct Transformer Wiring Method and Figure 2-6. Incorrect Transformer Wiring Method. Figure 2-5. Correct Transformer Wiring Method Figure 2-6. Incorrect Transformer Wiring Method Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 2 – 3
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Section 2 • Installation Recommendations Best Practices • Do: • Keep AC wires away from circuit boards. • Always run conduit into the bottom or sides of an enclosure. • If the conduit must be placed in the top of an enclosure, use a water-tight conduit fi tting to keep water from entering the enclosure. • The Vission 20/20 is supplied with pre- punched conduit holes. Use them! • Don’t: • Don’t run wires through the Vission 20/20 enclosure that are not related to the compres- sor control. • Do
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Section 3 • Hardware Architecture Overview The Vission 20/20 control panel utilizes X-86 PC technol- ogy with a Linux operating system. For hardware archi- tecture, see Figure 3-1 Hardware Architecture Overview. The Vission 20/20 has the following attributes: • Low power, Industrial rated X-86 CPU. • 15” XGA, high resolution LCD display. (Outdoor view- able LCD optional). • 8-wire touch screen operator interface. • Flexible and expandable I/O. • NEMA-4 enclosure (NEMA-4X optional). • Industrial
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Section 3 • Hardware Architecture Trip Output: Digital Input/Output (I/O) Refer to Table 2-1. Digital I/O. • This output is energized when the system has no Trips. If a trip is issued, the output de-energizes and stays de-energized until the trip condition is cleared. Compressor Start Output: Slide Valve Setpoint #1 Output (Economizer): • When the Vission 20/20 signals the compressor to • Normally used for an economizer solenoid, but could start, this output is energized. When the Vission b
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Section 3 • Hardware Architecture Table 3-1. Digital I/O (1 of 2) Board I/O # Description Type 1 1 Compressor Start OUTPUT 1 2 Oil Pump Start OUTPUT 1 3 Capacity Increase OUTPUT 1 4 Capacity Decrease OUTPUT 1 5 Volume Increase OUTPUT 1 6 Volume Decrease OUTPUT 1 7 Oil Separator Heater OUTPUT 2 8 Trip indicator (ON=Normal) OUTPUT 2 9 Slide Valve Set point #1 (Economizer) OUTPUT 2 10 Slide Valve Set point #2 (Hot Gas) OUTPUT 2 11 Alarm OUTPUT 212 Unused OUTPUT 2 13 Liquid Injection #1 OUTPUT 2 14
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Section 3 • Hardware Architecture Condenser Step #3 Output: High Level Shutdown Input: • This output is enabled when condenser control op- • This input must be energized in order for the com- tion is selected. A condenser fan or pump will be pressor to operate. If de-energized, the compressor turned on or off by this output. will shut down and issue a high level trip. Condenser Step #4 Output: Oil Level Float Switch #1 Input: • This output is enabled when condenser control op- • Used for Cool
