York MILLENNIUM YCAS 250, Manual

Page: 2 / 196

2
YORK INTERNATIONAL
SECTION
1
GENERAL CHILLER
INFORMATION & SAFETY
Introduction ............................................................. 6
Warranty .................................................................. 6
Safety ........................................................................ 6
Standards for Safety .................................................. 6
Responsibility for Safety ......................................... 7
About this Manual ................................................... 7
Misuse of Equipment ............................................... 7
Suitability for Application ......................................... 7
Structural Support ...................................................... 7
Mechanical Strength .................................................. 7
General Access .......................................................... 7
Pressure Systems ....................................................... 7
Electrical .................................................................... 7
Rotating Parts ............................................................ 8
Sharp Edges ............................................................... 8
Refrigerants and Oils ................................................. 8
High Temperature and Pressure Cleaning ................. 8
Emergency Shutdown ............................................. 8
Material Safety Data ............................................... 9
SECTION 2 PRODUCT DESCRIPTION
Introduction ........................................................... 12
General Description ................................................. 12
Compressor .............................................................. 12
Evaporator ............................................................... 13
Condenser ................................................................ 13
Economizer .............................................................. 14
Oil Separator / System ............................................. 14
Oil Cooling .............................................................. 15
Capacity Control ...................................................... 15
Power and Control Panel ......................................... 15
Microprocessor Controls ......................................... 15
Motor Current Protection ........................................ 15
Motor Protector Module .......................................... 16
Current Overload ..................................................... 16
Thermal Overload .................................................... 17
Current Imbalance ................................................... 17
Improper Phase Sequence ....................................... 17
Motor Protector Dip Switch Settings ...................... 18
Motor Starting ....................................................... 22
Keypad Controls .................................................... 22
Display ..................................................................... 22
Entry ........................................................................ 23
Setpoints .................................................................. 23
Clock ........................................................................ 23
Print ......................................................................... 23
Program ................................................................... 23
Accessories and Options ....................................... 23
Multiple Point Power Connection (Standard) ......... 23
Single-Point Power Connection
with Individual Circuit Protection ........................... 23
Single-Point Power Connection
with Combined Circuit Protection ........................... 23
Single-Point Power Connection
without Circuit Protection ....................................... 23
Control Circuit Terminal Block ............................... 23
Building Automation System (BAS) Interface ........ 23
Condenser Coil Protection ...................................... 23
DX Cooler Options ................................................ 24
300 PSIG (21 bar) Waterside Design Working
Pressure .................................................................... 24
1-1/2" (38 mm) Insulation ....................................... 24
Flange Accessory ..................................................... 24
Remote DX Cooler .................................................. 24
Flow Switch Accessory ........................................... 24
Star-Delta Compressor Motor Starter ..................... 24
Unit Enclosures ...................................................... 24
Fans ......................................................................... 24
Sound Reduction Options ..................................... 24
Vibration Isolation ................................................. 24
Unit Nomenclature and Nameplate
Engineering Data ................................................... 25
Basic Part Number ................................................... 25
Options Section of Part Number ............................. 25
SECTION 3 HANDLING AND STORAGE
Delivery and Storage ............................................. 27
Inspection ............................................................... 27
Moving the Chiller ................................................ 27
Lifting Weights ........................................................ 27
Unit Rigging ........................................................... 28
SECTION
4
INSTALLATION
Location Requirements ......................................... 29
Outdoor Installations ............................................ 29
Indoor Installations ............................................... 29
Location Clearances .............................................. 29
Installation of Vibration Isolators ....................... 30
Installation ............................................................... 30
Shipping Braces ..................................................... 30
Pipework Connection ............................................ 30
General Requirements ............................................. 30
Water Treatment .................................................... 31
Pipework Arrangement ......................................... 31
Connection Types & Sizes ..................................... 32
Cooler Connections ............................................... 32
Option Flanges ......................................................... 32
Refrigerant Relief Valve Piping ........................... 32
Ductwork Connection ........................................... 32
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