Starter to Control Panel Wiring .................... 46
10kV–13.8kV Medium Voltage Installation ...47
System Control Circuit Wiring .......................49
Water Pump Interlock Circuits and Flow
Switch Input ...................................................50
Temperature Sensor Circuits ........................ 50
Optional Control and Output Circuits ..........51
Optional Tracer Communication Interface ..51
Operating Principles ........................................52
CVHE, CVHG 3-Stage Compressor ..............52
CVHF 2-Stage Compressor ...........................52
Oil and Refrigerant Pump ............................. 53
Start-up and Shut Down .................................55
Sequence of Operation ................................. 55
Start-up Sequence of Operation—Wye-Delta .
........................................................................ 55
Ice Machine Control ...................................... 57
Free Cooling Cycle ........................................ 59
Free Cooling (FRCL) ......................................59
Hot Gas Bypass (HGBP) ................................ 59
Hot Water Control .......................................... 60
Heat Recovery Cycle...................................... 60
Auxiliary Condensers .................................... 60
Control Panel Devices and Unit Mounted De-
vices ................................................................ 61
Unit Start-Up and Shut-down Procedures .. 61
Unit Start-Up Check ......................................61
Daily Unit Shutdown ....................................62
Seasonal Unit Shutdown .............................62
Maintenance ....................................................64
Oil Filter Replacement Procedure ................66
General Lubrication ....................................... 67
Service for the 1st Stage Tang Operator......67
Service for the 1st and 2nd Stage Tang Oper-
ators ...............................................................67
Cleaning the Condenser ...............................68
Leak Checking Based on Purge Pump Out
Time ...............................................................68
Long Term Unit Storage ................................ 69
Unit Preparation ............................................69
Refrigerant Charge ........................................ 70
Recovery and Recycle Connections .............70
Waterbox Removal and Installation ..............72
...... ..............................74
.....................................74
RELEASED 10/Mar/2020 06:59:20 GMT
Forms ................................................................78
CenTraVac Commissioning Checklist ............78