Trane CVHH - Page 6

6 CVHH-SVX001A-EN
Table of Contents
Current Transformer and Potential Transform-
er Wire Sizing . . . . . . . . . . . . . . . . . . . . . . . . 50
Power Supply Wiring . . . . . . . . . . . . . . . . . . . 51
Three-Phase Power . . . . . . . . . . . . . . . . . 51
Circuit Breakers and Fused Disconnects . 52
CE for Control Power Transformer (CPTR) Op-
tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
CE for Starter or Drive . . . . . . . . . . . . . . . 52
Control Power Transformer (CPTR) Option
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Power Factor Correction Capacitors (Optional)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Interconnecting Wiring . . . . . . . . . . . . . . . . 56
Starter to Motor Wiring (Remote-Mounted
Starters Only) . . . . . . . . . . . . . . . . . . . . . . . . 57
Ground Wire Terminal Lugs . . . . . . . . . . 57
Terminal Clamps . . . . . . . . . . . . . . . . . . . 58
Wire Terminal Lugs . . . . . . . . . . . . . . . . . 58
Bus Bars . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Starter to Control Panel Wiring . . . . . . . . . 59
Medium Voltage Installation . . . . . . . . . . . . . 60
Medium Voltage Motor . . . . . . . . . . . . . . 60
Motor Terminal Box . . . . . . . . . . . . . . . . . 60
Motor Supply Wiring . . . . . . . . . . . . . . . . . . 61
System Control Circuit Wiring (Field Wiring)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Water Pump Interlock Circuits and Flow
Switch Input . . . . . . . . . . . . . . . . . . . . . . . 64
Temperature Sensor Circuits . . . . . . . . . . . 65
Optional Control and Output Circuits . . . 66
Optional Tracer Communication Interface 66
Unit Start-up/Commissioning . . . . . . . . . . 66
Starter Module Configuration . . . . . . . . . . 66
Schematic Wiring Drawings . . . . . . . . . . . . 66
Operating Principles . . . . . . . . . . . . . . . . . . . . 67
General Requirements . . . . . . . . . . . . . . . . 67
Cooling Cycle . . . . . . . . . . . . . . . . . . . . . . . . 67
Oil and Refrigerant Pump . . . . . . . . . . . . . . 68
Motor Cooling System . . . . . . . . . . . . . . . . 70
Tracer AdaptiView Display . . . . . . . . . . . . . 70
RuptureGuard . . . . . . . . . . . . . . . . . . . . . . . . 71
EarthWise Purge . . . . . . . . . . . . . . . . . . . . . . 71
How a Purge System Works . . . . . . . . . . .71
Start-up and Shut-down . . . . . . . . . . . . . . . . . .75
Chiller Sequence of Operation . . . . . . . . . .75
Software Operation Overview Diagram . .75
Start-up Sequence of Operation—Wye-Delta
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Power Up Diagram . . . . . . . . . . . . . . . . . . .78
Ice Machine Control . . . . . . . . . . . . . . . . . . .78
Free Cooling Cycle . . . . . . . . . . . . . . . . . . . . .80
Hot Water Control . . . . . . . . . . . . . . . . . . . . .80
Control Panel Devices and Unit-Mounted De-
vices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Unit Control Panel . . . . . . . . . . . . . . . . . . .81
User-Defined Language Support . . . . . . .81
Unit Start-up and Shut-down Procedures .81
Daily Unit Start-up . . . . . . . . . . . . . . . . . . .82
Seasonal Unit Start-up . . . . . . . . . . . . . . .82
Daily Unit Shut-down . . . . . . . . . . . . . . . .82
EarthWise Purge Sequence of Operations 83
Purge Operating Modes . . . . . . . . . . . . . .83
Air Removal . . . . . . . . . . . . . . . . . . . . . . . .87
Pump-out Operating Sequence . . . . . . . .87
Carbon Tank and Regeneration Subsystem
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Recommended Maintenance . . . . . . . . . . . . .91
Record Keeping Forms . . . . . . . . . . . . . . .91
Normal Operation . . . . . . . . . . . . . . . . . . .92
Compressor Oil Change . . . . . . . . . . . . . . . .93
Leak Checking Based on Purge Pump Out
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
RuptureGuard Maintenance . . . . . . . . . . . . .94
EarthWise Purge Maintenance . . . . . . . . . .94
Weekly Maintenance . . . . . . . . . . . . . . . . .94
Semi-Annual Maintenance . . . . . . . . . . . .95
Annual Maintenance . . . . . . . . . . . . . . . . .95
Inspecting the Moisture Indicator . . . . . . .95
Maintaining the Moisture-Indicating Sight
Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Removing Air After Servicing the Chiller .95
Recommended System Maintenance . . .96