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General Requirements ........................................... 32
Electrical Connection ..............................................33
Power Wiring ...........................................................33
Wiring ....................................................................... 33
115VAC 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 ................................................34
Remote Print ..........................................................34
Remote Setpoint Offset - Temperature.................. 34
Remote Setpoint Offset - Current ......................... 34
(Wye-Delta Typical) ................................................ 35
Option 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
Glycol Correction Factors ...................................... 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
and Individual System Circuit Breakers ................52
with Field Supplied Circuit Protection .................. 54
JOHNSON CONTROLS
TABLE OF CONTENTS (CONT'D)
Connection to Factory Circuit Breaker .................. 56
Compressor Data ................................................... 57
Fan Data ................................................................. 57
Electrical Notes ........................................................58
Wiring Diagram - Across-the-Line Start ..............60
Elementary Diagram - Across-the-Line Start ......62
Wiring Diagram - Wye-Delta Start ......................64
Elementary Diagram - Wye-Delta Start ............... 66
Control Panel Component Locations ....................68
Power Panel Component Locations ....................... 69
Connection Diagram ...............................................70
Connection Diagram (System Wirng) ................... 72
Compressor Terminal Box ..................................... 73
Dimensions ..............................................................76
YCAS0098EB - 0118EB (English) ...................... 76
YCAS0098EB - 0118EB (SI) ...............................78
YCAS0128EB (English) ..................................... 80
YCAS0128EB (SI) ...............................................82
YCAS00138EB (English) .................................... 84
YCAS00138EB (SI) .............................................86
YCAS0148EB - 0178EB (English) ..................... 88
YCAS0148EB - 0178EB (SI) ...............................90
YCAS0198EB - 0208EB (English) ..................... 92
YCAS0198EB - 0208EB (SI) ...............................94
Clearances ................................................................ 96
Operating Weights - Alum. Fin & Black Fin Coils ... 97
Isolation Selection - Alum. Fin & Black Fin Coils ... 98
Operating Weights - Copper Fin Condenser Coils .
(or Aluminum Fin with Optional Silencer Kits) ....102
Isolation Selection - Copper Fin CondenserCoil (or
Aluminum Fin with Optional Silencer Kits) .......103
Operating Weights - Copper Fin Condenser Coils
with Optional Silencer Kits ....................................104
Isolation Selection - Copper Fin Condenser Coils
with Optional Silencer Kits .........................................105
AWR/AWMR and CP Restrained Mountings..... 106
Refrigerant Flow Diagram ...................................107
Process and Instrumentation Diagram ...............108
Component Locations ..........................................109
Compressor Components ..................................... 110
System Start-up Checklist .................................... 116
Unit Checks ......................................................... 116
Panel Checks ....................................................... 117
Programmed Values .............................................. 117
Initial Start-up ....................................................... 118
Checking Subcooling and Superheat .................. 118
Checking Economizer Superheat ......................... 119
Leak Checking ....................................................... 119
FORM 201.18-NM7
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