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General Requirements ............................................... 32
Electrical Connection .............................................. 33
Power Wiring .......................................................... 33
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
(Wye-Delta Typical) ................................................. 35
Options Panel Layout (Typical) ............................... 36
Logic Section Layout .............................................. 37
Panel Layout ............................................................ 38
Customer Connections ........................................... 39
5
Preparation ............................................................. 41
Preparation - Power Off ......................................... 41
First Time Start-up ................................................. 43
6
General Description ................................................ 44
Start-up .................................................................... 44
Normal Running and Cycling ................................. 44
Shutdown ................................................................. 44
7
Flow Rate and Pressure Drop Charts ..................... 45
Temperature and Flows ........................................... 46
Physical Data (SI Units) .......................................... 47
Operating Limitations & Sound Power Data ......... 48
Electrical Data ......................................................... 50
Multiple Point Power Supply Connection ................ 50
with Individual System Circuit Breakers ................ 50
Control Power Supply ............................................... 52
Electrical Notes ....................................................... 53
3 & 4 Compressor Power Connection Options ......... 54
Compressor Data ...................................................... 56
YORK INTERNATIONAL
TABLE OF CONTENTS (CONT'D)
Fan Data .................................................................... 56
Elementary Diagram - Across-the-Line Start ....... 57
Wiring Diagrams-Across-the-Line Start and Wye-
Delta Start (YCAS0693 - YCAS0953) ................... 59
Wye-Delta Start ...................................................... 60
Wiring Diagram - Across-the Line Start ............. 61
Across-the Line Start and Wye-Delta Start .......... 62
Connection Diagram ............................................. 63B
Connection Diagram - Electrical Box .................. 67B
Control Circuit ....................................................... 69
Standard and Remote Evap. Units ............................ 72
Power Circuit .......................................................... 74
Wiring Diagram -Across-the -Line Start and
Wye-Delta Start (YCAS1062 - YCAS1263) .......... 76
Wye-Delta Start ...................................................... 77
Line Start (YCAS1063 - YCAS1263) ......................... 78
(YCAS1063 - YCAS1263) ....................................... 80
Connection Diagram Systems 1 & 2 ...................... 84
Connection Diagram - Electrical Box .................... 88
Control Circuit ....................................................... 90
Standard and Remote Evap. Units ............................ 93
Compressor Terminal Box - Systems 1- 4 ............. 95
Dimensions ............................................................. 96
YCAS0693 - 0773 (SI) ................................................ 96
YCAS0783 - 0953 (SI) ................................................ 98
YCAS1063 (SI) ........................................................ 100
YCAS1093 (SI) ........................................................ 102
YCAS1163 - 1263 (SI) .............................................. 104
Clearances ............................................................ 106
Operating Weights - Aluminum Fin Coils .......... 107
Isolator Selection - Aluminum Fin Coils ............. 108
Operating Weights - Copper Fin Coils ................ 109
Isolator Selection - Aluminum Fin Coils ..............110
Isolator Details ....................................................... 111
AWR/AWMR and CP Restrained Mountings .......113
Refrigerant Flow Diagram .....................................114
Process and Instrumentation Diagram ................. 115
Component Locations - 3 Compressor Units ........116
Component Locations - 4 Compressor Units ........117
FORM 201.18-NM4
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3
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