York MILLENIUM YCAS Series Installation Operation & Maintenance page 3

General Requirements ............................................ 30
Electrical Connection .............................................. 31
Power Wiring .......................................................... 31
Standard Units with Multi Point Power Supply
Wiring ..................................................................... 31
Units with Single-Point Power Supply Wiring ...... 31
115VAC Control Supply Transformer .................... 31
Remote Emergency Stop Device ........................... 32
Control Panel Wiring ............................................. 32
Volts Free Contacts ................................................. 32
Chilled Liquid Pump Starter ................................... 32
Run Contact .......................................................... 32
Alarm Contacts ..................................................... 32
System Inputs .......................................................... 32
Flow Switch ........................................................... 32
Remote Run / Stop ................................................ 32
Remote Print .......................................................... 32
Remote Setpoint Offset - Temperature ................. 32
Remote Setpoint Offset - Current ......................... 32
Power and Control Panel Layouts
(Wye-Delta Typical) ................................................. 33
Options Panel Layout (Typical) ............................... 34
Logic Section Layout .............................................. 35
Logic Section Layout with Control
Panel Layout ............................................................ 36
Customer Connections ........................................... 37
5
SECTION COMMISSIONING
Preparation ............................................................. 39
Preparation - Power Off ......................................... 39
First Time Start-up ................................................. 41
6
SECTION OPERATION
General Description ................................................ 42
Start-up .................................................................... 42
Normal Running and Cycling ................................. 42
Shutdown ................................................................. 42
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SECTION TECHNICAL DATA
Flow Rate and Pressure Drop Charts ..................... 43
Glycol Correction Factors ...................................... 43
Temperature and Flows ........................................... 44
YORK INTERNATIONAL
TABLE OF CONTENTS (CONT'D)
Physical Data (SI Units) .......................................... 45
Operating Limitations & Sound Power Data ......... 46
Electrical Data ......................................................... 48
Multiple Point Power Supply Connection ............. 48
Optional Single-Point Power Supply Connection
and Individual System Circuit Breakers ................ 50
Optional Single-Point Power Supply Connection
with Field Supplied Circuit Protection ................... 52
Optional Single-Point Power Supply
Connection to Factory Circuit Breaker .................. 54
Compressor Data ................................................... 55
Fan Data ................................................................ 55
Electrical Notes ....................................................... 56
Wiring Diagram - Across-the-Line Start ............. 57
Elementary Diagram - Across-The-Line Start ..... 60
Wiring Diagram - Wye-Delta Start ...................... 62
Elementary Diagram - Wye-Delta Start ................ 64
Panel Component Locations ................................... 66
Connection Diagram ............................................... 70
Compressor Terminal Box ...................................... 71
Dimensions ............................................................. 72
YCAS02830 - 0343 (SI) ........................................... 72
Clearances .............................................................. 74
Weight Distribution and Isolator Mounting
Positions .................................................................. 75
Installation Instructions for VMC Series
AWR/AWMR and CP Restrained Mountings ........ 83
Refrigerant Flow Diagram ...................................... 84
Process and Instrumentation Diagram .................. 85
Component Locations .............................................. 86
Compressor Components ........................................ 87
System Start-up Checklist ..................................... 93
Unit Checks ........................................................... 93
Panel Checks ......................................................... 94
Initial Start-up ......................................................... 95
Checking Subcooling and Superheat ..................... 95
Checking Economizer Superheat ........................... 96
Leak Checking ....................................................... 96
FORM 201.18-NM6
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