York YLAA0195 - User Manual

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YLAA0195 – YLAA0517

Air-Cooled Scroll Chillers with

Brazed Plate Heat Exchanger

Style B (50 Hz) 4 fan to 8 fan

55 Ton to 150 Ton

196 kW to 520 kW

R-410A

Issue Date:

September 20, 2024

Air-Cooled Scroll Chiller

with Bitzer Compressor

Installation, Operation,

Maintenance

Supersedes: 150.72-ICOM8.EN.GB (817) Form 150.72-ICOM8.EN.GB (924)

Main Page

Read before Proceeding2
General Safety Guidelines2
Safety Symbols2
Changeability of this Document3
Revision Notes3
Johnson Controls3
Table of Contents5
Section 1 - General Chiller Information and Safety11
Introduction11
Warranty11
Handling11
Safety and Quality11
About this Manual12
Misuse of Equipment12
Suitability for Application12
Structural Support12
Rotating Parts13
Sharp Edges13
Refrigerants and Oils13
FIGURE 1 - Emergency Shutdown Handle14
Safety Labels14
Introduction15
Section 2 - Product Description15
General System Description15
Brazed Plate Evaporator15
Communications17
Building Automation System Interface17
Power Panel17
Accessories and Options17
Single-Point Supply Terminal Block17
Control Transformer18
Control Options18
FIGURE 2 - Unit Components (Front)20
FIGURE 3 - Unit Components (Side)21
FIGURE 4 - Power Panel Components22
FIGURE 5 - Power Panel / Control Components23
FIGURE 6 - Process and Instrumentation Diagram24
Section 3 - Handling and Storage25
Lifting Weights25
Delivery and Storage25
Inspection25
Moving the Chiller26
Unit Removal from Shipping Container26
Lifting Using Lugs26
Lifting Using Shackles26
Section 4 - Installation27
Installation Checklist27
Startup/Commissioning27
Location and Clearances27
Spring Isolators (Optional)28
Compressor Mounting28
Remote Cooler Option28
Chilled Liquid Piping28
Pipework Arrangement29
Wiring29
FIGURE 7 - Chilled Liquid System29
Relief Valves30
High Pressure Cutout30
Single-Point Supply Connection - Terminal Block, Non-Fused31
Disconnect Switch or Circuit Breaker31
Control Panel31
FIGURE 8 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch31
Flow Switch32
FIGURE 9 - Control Wiring Inputs32
FIGURE 10 - Control Wiring Outputs33
Section 5 - Technical Data35
Operational Limitations35
TABLE 1 - Temperatures and Flows35
High Efficiency35
TABLE 2 - Physical Data (Metric)37
Condenser Fans37
Physical Data si37
Electrical Data39
Compressor Heaters39
TABLE 3 - Micropanel Power Supply39
TABLE 4 - Voltage Range39
TABLE 5 - Electrical Data Without Pumps40
TABLE 6 - Transformer Load40
TABLE 7 - Cable Size42
Electrical Notes43
Electrical Notes44
FIGURE 11 - Elementary Wiring Diagram48
FIGURE 12 - Fan Wiring, Standard Low Sound or Ultra Quiet, YLAA0195 - YLAA051750
FIGURE 13 - Fan Wiring, Standard Low Sound or Ultra Quiet, YLAA0195 - YLAA051752
FIGURE 14 - Power Options Connection Diagram54
FIGURE 15 - Power Panel56
Dimensions58
Dimensions59
Weight Distribution and Isolator Mounting Positions64
FIGURE 16 - Sample Printout Supplied in the Isolator Package and in the Chiller Panel Literature Packet64
Clearances65
FIGURE 17 - Unit Clearances - All Models65
Four Fan Isolator Locations66
Five and Six Fan Isolator Locations66
Seven and Eight Fan Isolator Locations67
Isolator Types68
One Inch Deflection Spring Isolators Installation Instructions69
Section 6 - Commissioning71
Preparation - Power off71
Preparation - Power on72
Pre-Start-Up73
Compressor Heater73
Cooling Setpoints74
Checking Superheat and Subcooling74
Section 7 - Unit Controls77
Introduction77
IPU II and I/O Boards77
Transformer78
Display78
Keypad78
Unit Switch78
Battery Back-Up78
Programming # of Compressors78
Unit Status79
General Status Messages79
Status Key79
System Safeties81
Unit Safeties82
Unit Warning83
FIGURE 18 - Status Key Messages Quick Reference List84
Display/Print Keys85
FIGURE 19 - Operation Data88
History Printout89
History Displays90
Software Version92
Entry Keys93
Enter/Adv Key93
Setpoints Keys94
Remote Setpoint Control95
Schedule/Advance Day Key95
TABLE 8 - Cooling Setpoint, Programmable Limits and Defaults96
Program Key97
TABLE 9 - Program Key Limits and Default98
FIGURE 20 - Setpoints Quick Reference List100
Unit Keys101
FIGURE 21 - Unit Keys Options Programming Quick Reference List106
Bacnet, Modbus, N2 and Yorktalk 2 Communications107
FIGURE 22 - Micro Panel Connections108
TABLE 10 - Minimum, Maximum and Default Values108
TABLE 11 - Values Required for Bas Communication109
Setting Description109
Communications Data Map Notes110
Alarm Notification110
TABLE 12 - Real Time Error Numbers110
TABLE 13 - Native Bacnet, Modbus and N2 Communications Data Map111
Yorktalk 2 Communications114
Transmitted Data114
TABLE 14 - Yorktalk 2 Communications Data Map115
Unit Operating Sequence119
Section 8 - Unit Operation119
Capacity Control119
Suction Pressure Limit Controls120
Discharge Pressure Limit Controls120
Leaving Chilled Liquid Control120
FIGURE 23 - Leaving Water Temperature Control Example120
Leaving Chilled Liquid Control Override to Reduce Cycling121
FIGURE 24 - Setpoint Adjust121
TABLE 15 - Sample Compressor Staging for Return Water Control121
TABLE 16 - Return Chilled Liquid Control for 4 Compressors (6 Steps)121
Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing122
Return Chilled Liquid Control122
TABLE 17 - Lead/Lag Return Chilled Liquid Control for 4 Compressors (6 Steps)122
Return Chilled Liquid System Lead/Lag and Compressor Sequencing123
Anti-Recycle Timer123
Anti-Coincidence Timer123
Evaporator Pump Control and York Hydro Kit Pump Control124
Evaporator Heater Control124
Pumpdown Control124
Standard Condenser Fan Control124
FIGURE 25 - Condenser Fan Locations124
TABLE 18 - YLAA Standard Condenser Fan Control Using Discharge Pressure Only (2, 3, or 4 Fans Per System)125
TABLE 19 - YLAA Standard Condenser Fan Control Using Discharge Pressure Only125
Load Limiting127
Compressor Run Status127
Alarm Status127
TABLE 20 - Compressor Operation Load Limiting127
Remote BAS/EMS Temperature Reset Using a Voltage or Current Signal128
Section 9 - Service and Troubleshooting129
Clearing History Buffers129
Service Mode129
Service Mode - Outputs129
Service Mode - Chiller Configuration130
Service Mode - Analog and Digital Inputs130
Control Inputs/Outputs131
TABLE 21 - I/O Digital Inputs131
TABLE 22 - I/O Digital Outputs131
TABLE 23 - I/O Analog Inputs131
TABLE 24 - I/O Analog Outputs131
FIGURE 26 - Microboard Layout132
Checking Inputs and Outputs133
TABLE 25 - Outdoor Air Sensor Temperature/Voltage/Correlation133
Digital Inputs133
TABLE 26 - Entering/Leaving Chilled Liquid Temp. Sensor, Temperature/Voltage Correlation134
TABLE 27 - Pressure Transducers135
Optional Printer Installation136
FIGURE 27 - I/O Board Relay Contact Architecture136
Assembly and Wiring137
FIGURE 28 - Printer to Microboard Electrical Connections137
Obtaining a Printout137
Troubleshooting138
TABLE 28 - Troubleshooting138
Section 10 - Maintenance141
Compressors141
Condenser Fan Motors141
Condenser MCHX Cleaning141
Operating Parameters142
On-Board Battery Back-Up142
Brazed Plate Heat Exchanger (Evaporator) Heater142
Overall Unit Inspection142
R-410A Pressure Temperature Chart144
Temperature145
TABLE 29 - si Metric Conversion145

York YLAA0195 - User Manual

Table of Contents

York YLAA0195 Specifications

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Brand	York
Model	YLAA0195
Category	Chiller
Language	English