Name: York YLAA0120
Brand: York
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JOHNSON CONTROLS

SECTION 2 – PRODUCT DESCRIPTION

FORM 150.72-ICOM6

ISSUE DATE: 08/03/2022

ITEM DESCRIPTION

1 Fan assemblies

2 MCHX condenser

3 Control panel

4 Compressors

Receiver included with optional heat

recovery condenser

6 Filter driers

FIGURE 2 - UNIT COMPONENTS (FRONT)

POWER

PANEL

POWER

PANEL

Table of Contents5
Section 1 - General Chiller Information and Safety11
Introduction11
Warranty11
Handling11
Safety and Quality11
About this Manual12
Misuse of Equipment12
Section 2 - Product Description15
Introduction15
General System Description15
FIGURE 1 - Compressor Enclosure for YLAA0041HE16
TABLE 1 - Canadian Registration Numbers16
Communications18
Building Automation System Interface18
Power Panel18
Accessories and Options18
FIGURE 2 - Unit Components (Front)21
FIGURE 3 - Unit Components (Side)22
FIGURE 4 - Power Panel Components23
FIGURE 5 - Power Panel / Control Components24
TABLE 2 - Complete Pin Number Description25
FIGURE 6 - Process and Instrumentation Diagram31
Section 3 - Handling and Storage33
FIGURE 7 - Rigging and Lifting Label33
Delivery and Storage34
Inspection34
Moving the Chiller34
FIGURE 8 - Unit Rigging/Lifting35
Lifting Weights36
Lifting Using Lugs36
Lifting Using Shackles36
FIGURE 9 - Lifting Lugs36
Section 4 - Installation37
Installation Checklist37
Startup/Commissioning37
Location and Clearances37
Spring Isolators (Optional)38
Compressor Mounting38
Chilled Liquid Piping38
Pipework Arrangement39
Wiring39
FIGURE 10 - Chilled Liquid System39
Relief Valves40
High Pressure Cutout40
Single-Point Supply Connection - Terminal Block, Non-Fused41
Disconnect Switch or Circuit Breaker41
FIGURE 11 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch41
FIGURE 12 - Control Wiring Inputs42
TABLE 3 - Chemical Specification of Water43
FIGURE 13 - Thermal Dispersion Flow Switch44
FIGURE 14 - Wiring of Thermal Dispersion Flow Switch44
FIGURE 15 - Control Wiring Outputs46
Section 5 - Technical Data47
TABLE 4 - Temperatures and Flows47
TABLE 5 - Ethylene and Propylene Glycol Correction Factors49
Physical Data YLAA0041 - YLAA0230 60 Hz50
TABLE 6 - Physical Data (English) 60 Hz50
Electrical Data54
Compressor Heaters54
TABLE 7 - Micropanel Power Supply54
TABLE 8 - Voltage Range54
TABLE 9 - Pump Electrical Data 60 Hz55
TABLE 10 - Transformer Load55
TABLE 11 - Electrical Data Without Pumps56
TABLE 12 - Wiring Lugs62
Electrical Notes65
FIGURE 16 - Elementary Wiring Diagram71
FIGURE 17 - Elementary Wiring Diagram72
FIGURE 18 - Fan Wiring, Standard Air Flow74
FIGURE 19 - Fan Wiring, High Air Flow76
FIGURE 20 - Single and Dual Point Wiring Options78
FIGURE 21 - Pump Wiring80
FIGURE 22 - EEV Controller Elementary Diagram82
FIGURE 23 - Compressor Wiring84
FIGURE 24 - Power Options Connection Diagram87
FIGURE 25 - Power Panel88
FIGURE 26 - Micro Panel Connections91
FIGURE 27 - Four Fan Units Dimensions - YLAA0041HE, YLAA0048HE, YLAA0058HE, YLAA0065HE92
FIGURE 28 - Four Fan Units Dimensions - YLAA0070SE, YLAA0080SE, YLAA0089SE93
FIGURE 29 - Five Fan Units Dimensions - YLAA0100SE94
FIGURE 30 - Six Fan Units Dimensions - YLAA0092HE, YLAA0101HE, YLAA0115SE, YLAA0120SE95
FIGURE 31 - Eight Fan Units Dimensions - YLAA0125HE, YLAA0136SE, YLAA0139HE, YLAA0142HE96
FIGURE 32 - Ten Fan Units Dimensions - YLAA0170SE, YLAA0156HE, YLAA0175HE97
FIGURE 33 - Twelve Fan Units Dimensions - YLAA200HE, YLAA0230HE98
Weight Distribution and Isolator Mounting Positions99
FIGURE 34 - Sample Printout Supplied in the Isolator Package and in the Chiller Panel Literature Packet99
Clearances100
FIGURE 35 - Unit Clearances - All Models100
Isolator Locations101
Isolator Information104
Section 6 - Commissioning111
Preparation - Power off111
FIGURE 36 - EEV IB-G Interface Board113
Commissioning the Pump VFD114
Preparation - Power on114
FIGURE 37 - Drive Display116
TABLE 13 - Drive Programming Parameters116
FIGURE 38 - Circuit Breaker Panel117
Determining Proper Oil Levels118
FIGURE 39 - Tandem Set118
FIGURE 40 - Trio Set118
Section 7 - Unit Controls123
Introduction123
IPU II and I/O Boards123
Transformer124
Display124
Keypad124
Unit Switch124
Battery Backup124
Programming the Number of Compressors124
Status Key125
TABLE 14 - YLAA Fault and Inhibit Codes131
TABLE 15 - Legend131
FIGURE 41 - Status Key Messages Quick Reference List132
Display/Print Keys133
FIGURE 42 - Operation Data136
Entry Keys141
Setpoints Keys142
Schedule/Advance Day Key143
TABLE 16 - Cooling Setpoint, Programmable Limits, and Defaults144
Program Key145
TABLE 17 - Program Key Limits and Default147
FIGURE 43 - Setpoints Quick Reference List148
TABLE 18 - Program Key Limits and Default149
Unit Keys151
FIGURE 44 - Unit Keys Options Programming Quick Reference List158
Bacnet, Modbus, N2, and Yorktalk 2 Communications159
FIGURE 45 - Micro Panel Connections160
TABLE 19 - Minimum, Maximum and Default Values160
TABLE 20 - Values Required for BAS Communication161
TABLE 21 - Real Time Error Numbers162
TABLE 22 - Native Bacnet, Modbus and N2 Communications Data Map163
TABLE 23 - Yorktalk 2 Communications Data Map168
Section 8 - Unit Operation175
Capacity Control175
Suction Pressure Limit Controls176
Discharge Pressure Limit Controls176
Leaving Chilled Liquid Control176
FIGURE 46 - Leaving Water Temperature Control Example176
Leaving Chilled Liquid Control Override to Reduce Cycling177
FIGURE 47 - Setpoint Adjust177
TABLE 24 - Sample Compressor Staging for Return Water Control177
Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing178
Return Chilled Liquid System Lead/Lag and Compressor Sequencing178
Anti-Recycle Timer178
Anti-Coincidence Timer178
Evaporator Pump Control and YORK Hydro Kit Pump Control178
Evaporator Heater Control179
Pumpdown Control179
Standard Condenser Fan Control179
VSD Fan179
Changing the Switch Point of the Thermal Dispersion Flow Switch179
FIGURE 48 - Condenser Fan Locations180
TABLE 25 - YLAA Standard Condenser Fan Control Using Discharge Pressure Only (2, 3, or 4 Fans Per System)181
TABLE 26 - YLAA Standard Condenser Fan Control Using Discharge Pressure Only181
Load Limiting183
Compressor Run Status183
Alarm Status183
TABLE 27 - Compressor Operation Load Limiting183
Remote BAS/EMS Temperature Reset Using a Voltage or Current Signal184
Section 9 - Service and Troubleshooting185
Clearing History Buffers185
Resetting System Lockout Faults185
Service Mode185
Service Mode - Outputs185
Service Mode - Chiller Configuration186
Service Mode - Analog and Digital Inputs186
Control Inputs/Outputs187
TABLE 28 - I/O Digital Inputs187
TABLE 29 - I/O Digital Outputs187
TABLE 30 - I/O Analog Inputs187
TABLE 31 - I/O Analog Outputs187
FIGURE 49 - Microboard Layout188
Checking Inputs and Outputs189
TABLE 32 - Outdoor Air Sensor Temperature/Voltage/Correlation189
TABLE 33 - Entering/Leaving Chilled Liquid Temp. Sensor, Temperature/Voltage Correlation190
TABLE 34 - Pressure Transducers191
FIGURE 50 - I/O Board Relay Contact Architecture192
TABLE 35 - Data Logging to Flash193
Optional Printer Installation195
FIGURE 51 - Printer to Microboard Electrical Connections196
Troubleshooting197
TABLE 36 - Troubleshooting197
Section 10 - Maintenance199
Compressors199
Condenser Fan Motors199
Condenser MCHX Cleaning199
Operating Parameters201
On-Board Battery Backup201
Thermal Dispersion Flow Switch201
Brazed Plate Heat Exchanger (Evaporator) Heater201
Overall Unit Inspection201
TABLE 37 - si Metric Conversion205

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Brand	York
Model	YLAA0120
Category	Chiller
Language	English