Johnson Controls YORK YLUA0078Z Series - Unit Components; FIGURE 2

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JOHNSON CONTROLS

FORM 150.73-NM1

ISSUE DATE: 07/03/2024

SECTION 2: PRODUCT DESCRIPTION

Unit components

FIGURE 2 - UNIT COMPONENTS FRONT

FAN ASSEMBLIES

CONTROL

PANEL

CONDENSER COILS

POWER

PANEL

COMPRESSORS

Main Page

General Safety Guidelines2
Safety Symbols2
Revision Notes3
Table of Contents5
Section 1: General Equipment Information and Safety11
Introduction11
Compressors11
Condenser11
Refrigerant Circuit11
Warranty11
Safety and Quality12
Responsibility for Safety12
About this Manual12
Misuse of Equipment13
Structural Support13
Emergency Shutdown14
Safety Labels14
Section 2: Product Description15
Introduction15
General System Description15
FIGURE 1 - Compressors15
Refrigerant Circuit16
Microcomputer Control Center16
High Ambient Kit17
Communications17
Power Panel17
Accessories and Options17
Power Options17
Control Options18
Unit Components20
FIGURE 2 - Unit Components Front20
FIGURE 3 - Power Panel Components21
FIGURE 4 - Power Panel / Control Components22
Nomenclature (Pin)23
TABLE 1 - Product Identification Number (Pin)23
Refrigerant Flow Diagram27
FIGURE 5 - Refrigerant Flow Diagram27
Process and Instrumentation Diagram28
FIGURE 6 - Process and Instrumentation Diagram28
Section 3: Handling and Storage29
Delivery and Storage29
Inspection29
Unit Rigging29
FIGURE 7 - Unit Rigging29
Installation Checklist31
Handling31
Section 4: Installation31
Location and Clearances31
Rooftop Locations31
Spring Isolators: Optional32
Compressor Mounting32
Pipework Arrangement32
Ductwork Connection32
Wiring32
Compressor Heaters33
Relief Valves33
High Pressure Cutout33
Electrical Wiring33
Compressor Heaters35
Refrigerant Piping35
TABLE 2 - Fitting Equivalent Lengths36
TABLE 3 - Refrigerant Piping Charges36
TABLE 4 - Miscellaneous Liquid Line Pressure Drops36
TABLE 5 - Refrigerant Line Connections37
Oil Traps38
Refrigerant Charge38
Filter Driers, Sight Glasses, and TXV'S38
Refrigerant Piping Notes39
TABLE 6 - Refrigerant Line Pressure Drops (English)39
Power Panel40
Control Panel40
FIGURE 8 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch40
FIGURE 9 - Discharge Air Sensor Field Wiring40
Control Wiring41
FIGURE 10 - Control Wiring41
Section 5: Technical Data43
Operational Limitations43
TABLE 7 - Voltage Limitations43
Physical Data44
TABLE 8 - Physical Data (English)44
Electrical Data45
TABLE 9 - Micro Panel Power Supply45
TABLE 10 - Voltage Range45
TABLE 11 - Standard Efficiency Unit Electrical Data (4 Compr) R-410A, Single Point46
TABLE 12 - Standard Efficiency Unit Electrical Data (5 Compr) R-410A, Single Point46
TABLE 13 - Standard Efficiency Unit Electrical Data (6 Compr) R-410A, Single Point48
TABLE 14 - High Efficiency Unit Electrical Data (5 Compr) R-410A, Single Point49
TABLE 15 - High Efficiency Unit Electrical Data (6 Compr) R-410A, Single Point49
TABLE 16 - Standard Efficiency Unit Electrical Data (4 Compr) R-454B, Single Point50
TABLE 17 - Standard Efficiency Unit Electrical Data (5 Compr) R-454B, Single Point50
TABLE 18 - Standard Efficiency Unit Electrical Data (6 Compr) R-454B, Single Point50
TABLE 19 - High Efficiency Unit Electrical Data (5 Compr) R-454B, Single Point52
TABLE 20 - High Efficiency Unit Electrical Data (6 Compr) R-454B, Single Point52
TABLE 21 - Standard Efficiency Unit Electrical Data (4 Compr) R-410A, Dual Point54
TABLE 22 - Standard Efficiency Unit Electrical Data (5 Compr) R-410A, Dual Point54
TABLE 23 - Standard Efficiency Unit Electrical Data (6 Compr) R-410A, Dual Point56
TABLE 24 - High Efficiency Unit Electrical Data (5 Compr) R-410A, Dual Point57
TABLE 25 - High Efficiency Unit Electrical Data (6 Compr) R-410, Dual Point57
TABLE 26 - Standard Efficiency Unit Electrical Data (4 Compr) R-454B, Dual Point58
TABLE 27 - Standard Efficiency Unit Electrical Data (5 Compr) R-454B, Dual Point58
TABLE 28 - Standard Efficiency Unit Electrical Data (6 Compr) R-454B, Dual Point58
TABLE 29 - High Efficiency Unit Electrical Data (5 Compr) R-454B, Dual Point60
TABLE 30 - High Efficiency Unit Electrical Data (6 Compr) R-454B, Dual Point60
TABLE 31 - Lug Sizing62
Wiring Diagrams68
FIGURE 11 - Elementary Wiring Diagram68
Power Options Connection Diagram78
FIGURE 12 - Power Options Connection Diagram78
FIGURE 13 - Single Point and Dual Point Wiring82
Wiring84
FIGURE 14 - Wiring84
Micro Panel Connections86
FIGURE 15 - Micro Panel Connections86
FIGURE 16 - Elementary Diagram88
Dimensions92
Clearances95
FIGURE 17 - Unit Clearances - All Models95
Weight Distribution and Isolator Mounting Positions96
FIGURE 18 - Sample Printout Supplied in the Isolator Package and in the Chiller Panel Literature Packet96
Isolator Information97
Section 6: Commissioning103
Commissioning103
Preparation: Power off103
Preparation: Power on104
Switch Settings104
Section 7: Unit Controls109
Introduction109
Microprocessor Board109
Unit Switch110
Display110
Keypad110
Battery Back-Up110
Transformer110
Single System Select and Programming Number of Compressors110
Unit Status111
General Status Messages111
Status Key111
System Safeties113
FIGURE 19 - Status Key Messages Quick Reference List116
Display/Print Keys117
FIGURE 20 - Operation Data120
Software Version124
Entry Keys125
Setpoints Keys126
Program Key128
TABLE 32 - Cooling Setpoints Programmable Limits and Defaults131
TABLE 33 - Program and Defaults131
FIGURE 21 - Setpoints Quick Reference List132
Unit Keys133
Option 6: Display Units134
Option 14: Refrigerant Type136
FIGURE 22 - Unit Keys Programming Quick Reference List138
Section 8: Unit Operation139
Capacity Control139
Suction Pressure Limit Controls139
Discharge Pressure Limit Controls139
Discharge Air Temperature Control139
FIGURE 23 - Discharge Air Temperature Control140
TABLE 34 - Discharge Air Temperature Control for 5 and 6 Compressors (7 and 8 Steps)140
TABLE 35 - Discharge Air Temperature Control for 4 Compressors (6 Steps)140
Suction Pressure Control141
FIGURE 24 - Suction Pressure Control141
System Lead/Lag142
Compressor Lead/Lag142
Anti-Recycle Timer142
Anti-Coincidence Timer142
Evaporator Blower Control142
Pumpdown Control142
FIGURE 25 - YLUA0078 - YLUA0095 Fan Location (Typical)143
TABLE 36 - YLUA0078 - YLUA0095 Condenser Fan Control Using Outdoor Ambient Temperature and Discharge Pressure143
TABLE 37 - YLUA0078 - YLUA0095 Condenser Fan Control Using Discharge Pressure Only143
TABLE 38 - YLUA0078 - YLUA0095 Low Ambient Condenser Fan Control144
Condenser Fan Control145
FIGURE 26 - YLUA0098 - YLUA0130 Fan Location145
TABLE 39 - YLUA0098 - YLUA0130 Condenser Fan Control145
FIGURE 27 - YLUA0148 - YLUA0158 Fan Location146
TABLE 40 - YLUA0148 - YLUA0158 Condenser Fan Control146
Load Limiting147
Compressor Run Status147
Alarm Status147
TABLE 41 - Compressor Operation - Load Limiting147
BAS/EMS Discharge Air Temperature Reset Using a Voltage or Current Signal148
Section 9: Service and Troubleshooting149
Clearing History Buffers149
Service Mode Outputs149
Service Mode Condensing Unit Configuration150
Service Mode Analog and Digital Inputs150
Control Inputs and Outputs151
TABLE 42 - I/O Digital Inputs151
TABLE 43 - I/O Digital Outputs151
TABLE 44 - I/O Analog Inputs151
TABLE 45 - I/O Analog Outputs151
FIGURE 28 - Microboard Layout152
Checking Inputs and Outputs153
TABLE 46 - Outdoor Air Sensortemperature/Voltage/Correlation153
Digital Inputs153
TABLE 47 - Discharge Air Temperature Sensor Temperature/Voltage/Resistance Correlation154
TABLE 48 - Pressure Transducers155
Digital Outputs156
FIGURE 29 - I/O Board Relay Contact Architecture156
Optional Printer Installation157
Assembly and Wiring157
FIGURE 30 - Printer to Microboard Electrical Connections157
TABLE 49 - Troubleshooting158
Section 10: Maintenance161
Important161
Compressors Oil Level Check161
Oil Analysis161
Condenser Fan Motors161
Condenser MCHX161
Microchannel Coil Cleaning161
Cleaning Procedure Required for Standard and Environment Guard Microchannel Coils162
Cleaning Procedure for Environment Guard Premium Microchannel Coils162
Steps to Touch-Up Small Sections of Finned Coil Surface163
Steps to Touch-Up End (Dead) Tubes and Condenser Coil Headers163
Materials Required163
Chilled Liquid System Maintenance164
Scheduled Maintenance164
Chiller / Compressor Operating Log164
Evaporator Freeze Damage164
Glycol Concentration164
Winterization164
Before Applying Power to the Chiller, Ensure the Chilled Liquid System Is Filled164
Removing Water/Glycol from the Evaporator165
Operating Parameters165
On-Board Battery Backup165
Brazed Plate Heat Exchanger (Evaporator) Heater165
Overall Unit Inspection165
BAS Control166
TABLE 50 - BAS Received Data166
TABLE 51 - BAS Transmitted Data166
TABLE 52 - BAS Operational and Fault Codes168
Bacnet and Modbus Data Communication169
TABLE 53 - Minimum, Maximum and Default Values170
TABLE 54 - Real Time Error Numbers170
TABLE 55 - Serial Communication Analog Value Data171
TABLE 56 - Serial Communication Binary Value Data171
TABLE 57 - Serial Communication Analog Input Data171
TABLE 58 - Serial Communication Binary Input Data173
TABLE 59 - Temperature Conversion Chart - Actual Temperature174
TABLE 60 - Temperature Conversion Chart Differential Temperatures174
TABLE 61 - Pressure Conversion Chart - Gauge or Differential175
TABLE 62 - R-410A Pressure-Temperature Chart175
TABLE 63 - R-454B Pressure-Temperature Chart176

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Johnson Controls YORK YLUA0078Z Series - Unit Components; FIGURE 2 - Unit Components Front

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