York YCAS Series Installation Operation & Maintenance page 5

SECTION 5 - COMMISSIONING ..................... 40
PREPARATION ........................................................ 40
PREPARATION - POWER OFF .............................. 40
Inspection ....................................................................40
Refrigerant Charge ......................................................40
Valves ..........................................................................40
Compressor Oil............................................................40
Fans..............................................................................40
Isolation/Protection......................................................40
Control Panel ...............................................................40
Power Connections......................................................40
Grounding....................................................................40
Overloads.....................................................................40
Supply Voltage.............................................................40
Control Transformer ....................................................40
Switch Settings ............................................................41
Compressor Heaters.....................................................41
Water System...............................................................41
Flow Switch.................................................................41
Temperature sensor(s)..................................................41
Control Supply.............................................................41
Programmed Options...................................................41
Programmed Settings...................................................41
Date and Time..............................................................41
Start/Stop Schedule .....................................................41
Setpoint and Remote Offset.........................................41
FIRST TIME START-UP ........................................... 42
Interlocks .....................................................................42
System Switches..........................................................42
Start-up ........................................................................42
Oil Pressure .................................................................42
Refrigerant Flow..........................................................42
Fan Rotation ................................................................42
Suction Superheat........................................................42
Expansion Valve .........................................................42
Economizer Superheat ................................................42
Subcooling...................................................................42
General Operation .......................................................42
SECTION 6 - OPERATION .............................. 44
GENERAL DESCRIPTION....................................... 44
START-UP ................................................................ 44
NORMAL RUNNING AND CYCLING ....................... 44
SHUTDOWN ............................................................ 44
SECTION 7 - TECHNICAL DATA .................... 46
FLOW RATE AND PRESSURE DROP CHARTS..... 46
GLYCOL CORRECTION FACTORS ........................ 46
PHYSICAL DATA - YCAS R-407C (SI UNITS) ......... 48
OPERATING LIMITATIONS AND SOUND POWER
DATA......................................................................... 49
ELECTRICAL DATA.................................................. 50
YORK INTERNATIONAL
TABLE OF CONTENTS (CONT'D)
MULTIPLE POINT POWER SUPPLY
CONNECTION ......................................................... 50
MULTIPLE POINT POWER SUPPLY
CONNECTION ......................................................... 51
OPTIONAL SINGLE POINT POWER SUPPLY
CONNECTION AND INDIVIDUAL SYSTEM
CIRCUIT BREAKERS .............................................. 52
ELECTRICAL NOTES .............................................. 54
WIRING DIAGRAMS ................................................ 56
WIRING DIAGRAMS ................................................ 73
DIMENSIONS - YCAS0685 (SI) .............................. 94
DIMENSIONS - YCAS0775 - YCAS0905 (SI) ......... 96
DIMENSIONS - YCAS0965 (SI) .............................. 98
DIMENSIONS - YCAS1065 - YCAS1215 (SI) ....... 100
TECHNICAL DATA ................................................. 102
WEIGHT DISTRIBUTION AND ISOLATOR
MOUNTING POSITIONS ...................................... 103
INSTALLATION INSTRUCTIONS FOR VMC
SERIES AWR/AWMR AND CP RESTRAINED
MOUNTINGS.......................................................... 120
COMPRESSOR COMPONENTS........................... 124
SYSTEM STARTUP CHECKLIST .......................... 130
UNIT CHECKS (NO POWER) ................................130
PANEL CHECKS (POWER ON - BOTH SYSTEM
SWITCHES "OFF")..................................................131
PROGRAMMED VALUES ......................................131
INITIAL START-UP..................................................132
CHECKING SUBCOOLING AND SUPERHEAT ..132
CHECKING ECONOMIZER SUPERHEAT ...........132
LEAK CHECKING...................................................132
SECTION 8 - MICRO PANEL CONTENTS.... 134
CHILLER CONTROL PANEL ................................. 134
PROGRAMMING AND DATA ACCESS KEYS ....... 134
DISPLAY AND STATUS INFORMATION KEYS ..... 134
ON / OFF ROCKER SWITCH ................................ 134
PROGRAM & SETUP KEYS .................................. 134
1. INTRODUCTION & PHYSICAL
DESCRIPTION..........................................................135
1.1 General ................................................................135
1.2 Keypad & Display ...............................................135
1.3 Unit (Chiller) On / Off Switch.............................136
1.4 Microprocessor Board .........................................136
1.5 Ancillary Circuit Boards......................................136
1.6 Circuit Breakers ..................................................137
1.8 Transformers........................................................138
1.9 Motor Protector Modules ....................................138
1.10 Ems/bas Controls...............................................140
1.11 Microprocessor Board Layout ...........................142
1.12 Logic Section Layout .......................................143
1.13 Anti-recycle Timer.............................................144
FORM 201.19-NM8 (804)
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