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Trane CenTraVac CVHE - Page 6

Trane CenTraVac CVHE
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6
CVHE-SVX005C-EN
Electrical Requirements . . . . . . . . . . . . . . . . . . . 56
Trane-supplied Starter Wiring . . . . . . . . . . . . . . 57
Customer-supplied Remote Starter
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Current Transformer and Potential
Transformer Wire Sizing . . . . . . . . . . . . . . . . . . . 58
Power Supply Wiring. . . . . . . . . . . . . . . . . . . . . . . . 60
Three-Phase Power. . . . . . . . . . . . . . . . . . . . . . . 60
Circuit Breakers and Fused
Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Power Factor Correction Capacitors
(Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Interconnecting Wiring . . . . . . . . . . . . . . . . . . . . 61
Starter to Motor Wiring (Remote-Mounted
Starters Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Ground Wire Terminal Lugs. . . . . . . . . . . . . 62
Terminal Clamps . . . . . . . . . . . . . . . . . . . . . . 63
Wire Terminal Lugs. . . . . . . . . . . . . . . . . . . . 63
Bus Bars. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Starter to Control Panel Wiring . . . . . . . . . . . . . 64
10 to 13.8kV Medium Voltage Motor . . . . . . . . . 65
Motor Terminal Box . . . . . . . . . . . . . . . . . . . . . . . 65
Motor Supply Wiring . . . . . . . . . . . . . . . . . . . . . . 65
Motor Terminals. . . . . . . . . . . . . . . . . . . . . . . 66
Ground Wire Terminal Lug. . . . . . . . . . . . . . 66
System Control Circuit Wiring (Field
Wiring) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Water Pump Interlock Circuits and Flow
Switch Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Chilled Water Pump . . . . . . . . . . . . . . . . . . . 68
Chilled Water Proof of Flow. . . . . . . . . . . . . 68
Condenser Water Pump . . . . . . . . . . . . . . . 68
Condenser Water Proof of Flow . . . . . . . . . 68
Heat Recovery Proof of Flow . . . . . . . . . . . 68
Temperature Sensor Circuits . . . . . . . . . . . . . . . 69
CWR Outdoor Option . . . . . . . . . . . . . . . . 69
Optional Control and Output
Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Starter Module Configuration . . . . . . . . . . . . . . . 69
Schematic Wiring Drawings . . . . . . . . . . . . . . . . 69
Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . 70
General Requirements . . . . . . . . . . . . . . . . . . . . 70
Cooling Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
CVHE and CVHG 3-Stage
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . 70
CVHF 2-Stage Compressor . . . . . . . . . . . . 70
Oil and Refrigerant Pump . . . . . . . . . . . . . . . . . . 71
Compressor Lubrication System . . . . . . . . 71
Motor Cooling System . . . . . . . . . . . . . . . . . . . . . 74
Tracer
®
AdaptiView™ Display. . . . . . . . . . . . . . 74
Start-Up and Shutdown . . . . . . . . . . . . . . . . . . . . . 75
Sequence of Operation . . . . . . . . . . . . . . . . . . . . 75
Software Operation Overview
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Start-up Sequence of Operation—Wye-
delta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Ice Building Control . . . . . . . . . . . . . . . . . . . . . . . 80
Free Cooling Cycle . . . . . . . . . . . . . . . . . . . . . . . 82
Free Cooling (FRCL) . . . . . . . . . . . . . . . . . . 83
Hot Gas Bypass (HGBP) . . . . . . . . . . . . . . . . . . 83
Hot Water Control . . . . . . . . . . . . . . . . . . . . . . . . 83
Heat Recovery Cycle. . . . . . . . . . . . . . . . . . . . . . 84
Auxiliary Condensers . . . . . . . . . . . . . . . . . . . . . 84
Control Panel Devices and Unit-Mounted
Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Unit Control Panel. . . . . . . . . . . . . . . . . . . . . 84
User-defined Language Support . . . . . . . . 84
Unit Start-Up and Shutdown
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Daily Unit Start-Up . . . . . . . . . . . . . . . . . . . . 85
Seasonal Unit Start-Up . . . . . . . . . . . . . . . . 86
Daily Unit Shutdown . . . . . . . . . . . . . . . . . . . 86
Seasonal Unit Shutdown . . . . . . . . . . . . . . . 86
Recommended Maintenance. . . . . . . . . . . . . . . . 87
Record Keeping Forms . . . . . . . . . . . . . . . . . . . . 87
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . 87
Recommended Compressor Oil
Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Purge System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
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Table of Contents

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