York MILLENIUM YCAS Series

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INSTALLATION, OPERATION & MAINTENANCE

MILLENNIUM

AIR-COOLED SCREW LIQUID CHILLERS

New Release

Form 201.18-NM6 (800)

MILLENNIUM

YCAS AIR-COOLED SCREW LIQUID CHILLERS

YCAS0283 through YCAS0343

YCAS 2 SYSTEM EPROM 031-01798-001 (STANDARD, BRINE & METRIC MODELS COMBINED)

00397VIP(R)

Main Page

Default Chapter2
- Table of Contents2
Section 1 General Chiller Information & Safety6
- Introduction6
- Warranty6
- Safety6
  - Standards for Safety6
- Responsibility for Safety7
- About this Manual7
- Misuse of Equipment7
- Emergency Shutdown8
- Material Safety Data9
Section 2 Product Description12
- Introduction12
- Motor Starting20
- Keypad Controls20
- Accessories and Options21
- DX Cooler Options22
- Unit Enclosures22
- Fans22
- Sound Reduction Options22
- Unit Nomenclature and Nameplate Engineering Data23
  - Basic Part Number23
  - Options Section of Part Number24
Section 3 Handling and Storage25
- Delivery and Storage25
- Inspection25
- Moving the Chiller25
  - Lifting Weights25
- Unit Rigging26
Section 4 Installation27
- Location Requirements27
- Outdoor Installations27
- Indoor Installations27
- Location Clearances27
- Installation of Vibration Isolators28
  - Installation28
- Shipping Braces28
- Pipework Connection28
  - General Requirements28
- Water Treatment29
- Pipework Arrangement30
- Connection Types & Sizes30
- Cooler Connections30
  - Option Flanges30
- Refrigerant Relief Valve Piping30
- Ductwork Connection30
  - General Requirements30
- Electrical Connection31
- Power Wiring31
- Standard Units with Multi Point Power Supply Wiring31
  - Units with Single-Point Power Supply Wiring31
- 115VAC Control Supply Transformer31
  - Remote Emergency Stop Device32
- Control Panel Wiring32
- Volts Free Contacts32
  - Chilled Liquid Pump Starter32
  - Run Contact32
  - Alarm Contacts32
- System Inputs32
  - Flow Switch32
  - Remote Run/Stop32
  - Remote Print32
- Power and Control Panel Layouts (Wye-Delta Typical)33
- Options Panel Layout (Typical)34
- Logic Section Layout35
- Logic Section Layout with Control Panel Layout36
- Customer Connections37
Section 5 Commissioning39
- Preparation39
- Preparation - Power off39
- First Time Start-Up41
Section 6 Operation42
- General Description42
- Start-Up42
- Normal Running and Cycling42
- Shutdown42
Section 7 Technical Data43
- Flow Rate and Pressure Drop Charts43
- Glycol Correction Factors43
- Temperature and Flows44
Physical Data (si Units)45
Operating Limitations & Sound Power Data46
Electrical Data48
- Multiple Point Power Supply Connection48
- Optional Single-Point Power Supply Connection and Individual System Circuit Breakers50
- Optional Single-Point Power Supply50
- Optional Single-Point Power Supply Connection with Field Supplied Circuit Protection52
- Connection to Factory Circuit Breaker54
- Compressor Data55
- Fan Data55
Electrical Notes56
Wiring Diagram Across-The-Line Start57
Elementary Diagram - Across-The-Line Start60
Wiring Diagram Wye-Delta Start62
Elementary Diagram - Wye-Delta Start64
Panel Component Locations66
Connection Diagram70
Compressor Terminal Box71
Dimensions72
- Ycas02830 - 0343 (Si)72
Clearances74
Weight Distribution and Isolator Mounting Positions75
Installation Instructions for VMC Series AWR/AWMR and CP Restrained Mountings83
Refrigerant Flow Diagram84
Process and Instrumentation Diagram85
Component Locations86
Compressor Components87
System Startup Checklist93
- Unit Checks93
- Panel Checks94
Initial Start-Up95
Checking Subcooling and Superheat95
Checking Economizer Superheat96
Leak Checking96
Section 8 Micro Panel Contents97
- Chiller Control Panel Programming and Data Access Keys97
  - Display and Status Information Keys97
- ON / off Rocker Switch97
- Program & Setup Keys97
1 Introduction & Physical Description98
- 1.1 General98
- 1.2 Keypad & Display98
- 1.3 Unit (Chiller) on / off Switch99
- 1.4 Microprocessor Board99
- 1.5 Ancillary Circuit Boards99
- 1.6 Circuit Breakers100
- Current Transformers (C.T.)100
- Transformers100
- Motor Protection Modules101
- EMS/BAS Controls103
- Microprocessor Board Layout105
- Logic Section Layout106
- Anti-Recycle Timer107
- Anti-Coincidence Timer107
- Evaporator Pump Control107
- Compressor Heater Control107
- Evaporator Heater Control107
- Pumpdown (LLSV) Control107
- Alarms107
- Run Status (Chiller)108
- Lead / Lag Compressor Selection108
2 Status Key: General Status Messages and Fault Warnings109
- General109
- General Status Messages109
- Unit Warnings110
- Anticipation Control Status Messages111
- Unit Fault Status Messages112
- System Fault (Safety) Status Messages113
- Printout on Fault Shutdown116
3 Display Keys & Option Switches117
- General117
- Chilled Liquid Temps Key117
- System # Data Keys118
- Ambient Temp Key118
- Motor Current Key119
- Operating HRS / Start Counter Key119
- Options Key & Dip Switch Settings119
- Function Key121
4 Print Keys122
- General122
- Oper Data Key122
- Operating Data - Local Display Messages122
- Operating Data - Remote Printout123
- History Key125
- Fault History Data - Local Display Messages125
- Fault History Data - Remote Printout128
5 Entry Keys129
- General129
- Numerical Keypad129
- Enter Key129
- Cancel Key129
- Keys129
6 Setpoints Keys & Chilled Liquid Control130
- General130
- Chilled Liquid Temperature Control130
- Local Cooling Setpoints Key133
- Remote Cooling Setpoints Key133
7 Clock Keys134
- General134
- Set Time Key134
- Set Schedule / Holiday Key135
- Manual Override Key136
8 Program Key137
- General137
- Program Key - User Programmable Values137
- Programming "Default" Values141
- Condenser Fan Control142
Section 9 Maintenance146
- General Requirements146
- Compressor Unit Operation147
- Maintenance Requirements148
- General Periodic Maintenance Checks Standard Units149
Section 10 Spare Parts150
- Recommended Spares150
- Recommended Compressor Oils150
- Associated Drawings150
Section 11 Troubleshooting151
- Competent Persons Troubleshooting Guide151
- Sensor Calibration Charts153
- Limited Warranty Applied Systems154
- Temperature Conversion Chart155

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York MILLENIUM YCAS Series Specifications

General

Brand	York
Model	MILLENIUM YCAS Series
Category	Chiller
Language	English

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