York MILLENNIUM YCAS 250 Manual page 3

General Requirements ............................................. 32
Electrical Connection ............................................ 33
Power Wiring ......................................................... 33
Standard Units with Multi Point Power Supply
Wiring ..................................................................... 33
Units with Single-Point Power Supply Wiring ........ 33
115V Control Supply Transformer ...................... 33
Remote Emergency Stop Device ............................. 34
Control Panel Wiring ............................................ 34
Volts Free Contacts ................................................ 34
Chilled Liquid Pump Starter .................................... 34
Run Contact ............................................................. 34
Alarm Contacts ........................................................ 34
System Inputs ......................................................... 34
Flow Switch ............................................................. 34
Remote Run / Stop Switch ....................................... 34
Remote Print ............................................................ 34
Remote Setpoint Offset - Temperature ................... 34
Remote Setpoint Offset - Current ........................... 34
Power and Control Panel Layouts
(Wye-Delta Typical) ............................................... 35
Options Panel Layout (Typical) ........................... 36
Logic Section Layout ............................................. 37
Logic Section Layout with Control
Panel Layout .......................................................... 38
Customer Connections .......................................... 39
SECTION 5 COMMISSIONING
Preparation ............................................................ 41
Preparation - Power Off ...................................... 41
First Time Start-up ................................................ 43
SECTION 6 OPERATION
General Description .............................................. 44
Start-up ................................................................... 44
Normal Running and Cycling .............................. 44
Shutdown ................................................................ 44
SECTION 7 TECHNICAL DATA
Flow Rate and Pressure Drop Charts ................. 45
Temperature and Flows ........................................ 46
Physical Data (English Units) ............................... 47
Physical Data (SI Units) ........................................ 48
Operating Limitations & Sound Power Data ..... 49
Electrical Data ....................................................... 50
Multiple Point Power Supply Connection ............... 50
Optional Single-Point Power Supply Connection
and Internal Unit Circuit Breakers .......................... 52
Electrical Notes ...................................................... 54
Compressor Data ..................................................... 55
Fan Data ................................................................... 55
YORK INTERNATIONAL
TABLE OF CONTENTS (CONT'D)
Elementary Diagram ............................................. 56
Elementary Diagram - Across-the-Line Start ......... 57
Wiring Diagrams-Across-the-Line Start and Wye-
Delta Start (YCAS0250 - YCAS0330) ................. 58
Standard 3 Compressor Power Supplies
Wye-Delta Start ..................................................... 59
Wiring Diagram - Across-the Line Start ............ 60
Standard Compressor Power Supplies -
Across-the Line Start and Wye-Delta Start ........ 62
Connection Diagram ........................................... 63B
Connection Diagram - Electrical Box ............... 67B
Elementary Diagram DXST Direct Drive
Control Circuit ....................................................... 69
Connection Diagram System Wiring -
Standard and Remote Evap. Units ...................... 72
Elementary Diagram DXST Direct Drive
Power Circuit ......................................................... 74
Wiring Diagram -Across-the -Line Start and Wye-
Delta Start (YCAS0360 - YCAS0440) ................. 76
Standard 4 Compressor Power Supplies
Wye-Delta Start ..................................................... 77
Standard Compressor Power Supplies - Across-the-
Line Start (YCAS0360 - YCAS0440 .................... 78
Standard Compressor Power Supplies
(YCAS0360 - YCAS0440) ........................................ 80
Connection Diagram Systems 1 & 2 .................... 84
Connection Diagram Systems 3 & 4 .................. 85B
Connection Diagram - Electrical Box ................. 88
Elementary Diagram DXST Direct Drive
Control Circuit ....................................................... 90
Connection Diagram System Wiring -
Standard and Remote Evap. Units ...................... 93
Compressor Terminal Box - Systems 1- 4 ........... 95
Dimensions .............................................................. 96
YCAS 250 - 270 (English) ...................................... 96
YCAS 250 - 270 (SI) ............................................... 98
YCAS 300 - 330 (English) .................................... 100
YCAS 300 - 330 (SI) ............................................. 102
YCAS 360 (English) ............................................. 104
YCAS 360 (SI) ...................................................... 106
YCAS 400 - 440 (English) .................................... 108
YCAS 400 - 440 (SI) .............................................. 110
Clearances ............................................................. 112
Weight Distribution and Isolator Mounting
Positions ................................................................. 113
Installation Instructions for VMC Series
AWR/AWMR and CP Restrained Mountings .. 121
Refrigerant Flow Diagram ................................. 122
Process and Instrumentation Diagram .............. 123
Component Locations - 3 Compressor Units ... 124
Component Locations - 4 Compressor Units ... 125
FORM 201.18-NM3
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