York YVAA - Page 192

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5000 Renaissance Drive, New Freedom, Pennsylvania USA 17349 Subject to change without notice. Printed in USA

Form 201.47-ICOM1 (1122)

Issue Date: November 14, 2022

Supersedes 201.47-ICOM1 (622)

1-800-524-1330

www.johnsoncontrols.com

Main Page

Table of Contents6
Section 1 - General Chiller Information and Safety11
Introduction11
Warranty11
Quality Assurance and Safety12
Fluorinated Greenhouse Gases12
Responsibility for Safety12
About this Manual12
Misuse of Equipment12
Section 2 - Product Description15
General System Description15
Figure 1 - YVAA Air-Cooled Screw Liquid Chiller with Variable Speed Drive15
Figure 2 - Chiller Control System16
Semi-Hermetic YORK Twin-Screw Compressors17
Evaporator17
Condenser17
Refrigerant Circuit17
Electrical17
Building Automation System Capabilities18
Microcomputer Control Center18
Figure 3 - View of YORK Control Center User Interface18
Accessories and Options19
Fan Options19
Condenser Coils19
Section 3 - Rigging, Handling, and Storage23
Lifting Weights23
Delivery and Storage23
Inspection24
Moving the Chiller24
Unit Removal from Shipping Container24
Lifting Using Lugs24
Lifting Using Shackles24
Figure 4 - Lifting Lug24
Figure 5 - Lifting Using Lugs24
Figure 5 - Power Panel, 1 to 425
Table 1 - Unit Lifting Point Locations25
Figure 6 - Power Panel, 1 to 526
Figure 7 - Power Panel, 1 to 627
Figure 8 - Power Panel, 1 to 828
Section 4 - Installation29
Location Requirements29
Outdoor Installations29
Location Clearances29
Figure 9 - Acceptable Minimum Clearances Around and between Units30
Table 2 - Minimum Evaporator Tube Removal Clearance30
Vibration Isolators31
Shipping Braces31
Chilled Liquid Piping31
Evaporator Pressure Drop32
Water Treatment33
Pipework Arrangement33
Minimum Water Volume33
Leaving Water Temperature out of Range33
Figure 10 - Pipework Arrangement33
Figure 11 - Leaving Water Temperature out of Range Suggested Layout33
Thermal Storage34
Variable Primary Flow34
Connection Types and Sizes34
Evaporator Connections34
Figure 12 - Suggested Layout for Applications with a Flow Rate Less than the Evaporator Minimum34
Figure 13 - Suggested Layout for Applications with a Flow Rate Greater than the Evaporator Maximum34
Figure 14 - Grooved Nozzle34
Table 3 - Evaporator Connections Dimensions35
Refrigerant Relief Valve Piping36
Electrical Connection36
Figure 15 - Flange for GB Vessels36
Figure 16 - Flange Attachment36
Power Wiring37
Power Supply Wiring37
115 VAC Control Supply Transformer37
Control Wiring37
Volts Free Contacts38
System Inputs38
Power Supply Wiring39
Figure 17 - Single Point Power Wiring39
Figure 18 - Dual Point Power Wiring40
Customer Control Wiring41
Figure 19 - Customer Control Connections41
Thermal Dispersion Flow Switch Connections42
Figure 20 - Thermal Dispersion Flow Switch Connections42
Figure 21 - Reserved Customer Wiring Entry43
Figure 22 - Water Box Heater Wiring Box43
Table 4 - Electrical Lug Data45
Section 5 - Technical Data65
Table 5 - Physical Data - Microchannel Coil66
Figure 23 - Standard Two-Pass, Right Side Inlet/Outlet Evaporator Connections70
Table 6 - Standard Two-Pass, Right Side Inlet/Outlet Evaporator Connections70
Figure 24 - Optional Two-Pass Left Side Inlet/Outlet Connections72
Table 7 - Optional Two-Pass Left Side Inlet/Outlet Connections72
Figure 25 - Standard Two-Pass Left Side Inlet/Outlet Connections74
Table 8 - Standard Two-Pass Left Side Inlet/Outlet Connections74
Figure 26 - Optional Three-Pass Inlet/Outlet Connections75
Table 9 - Optional Three-Pass Inlet/Outlet Connections75
Figure 27 - YVAA Dimensions77
Figure 28 - Isolator Selection and Mounting Locations78
Table 10 - Isolator Selection and Mounting Locations78
Figure 29 - Isolator Selection and Mounting Locations79
Figure 30 - Isolator Selection and Mounting Locations80
Figure 31 - Isolator Selection and Mounting Locations81
Figure 32 - Isolator Selection and Mounting Locations82
Figure 33 - Isolator Selection and Mounting Locations83
Figure 34 - Isolator Selection and Mounting Locations84
Figure 35 - Isolator Selection and Mounting Locations85
Figure 36 - Isolator Selection and Mounting Locations86
Figure 37 - Isolator Selection and Mounting Locations87
Elastomeric Isolator Installation88
Figure 38 - Elastomeric Isolator88
Elastomeric Isolator Specifications89
Figure 39 - Elastomeric Isolator Specifications89
Table 11 - Elastomeric Dimensions89
Table 12 - Elastomeric Weights89
One Inch Deflection Isolator Installation90
Figure 40 - One Inch Deflection Isolator90
One Inch Deflection Spring Isolator Specifications91
Figure 41 - One Inch Deflection Isolator Specifications91
Table 13 - One Inch Deflection Isolator Dimensions91
Table 14 - One Inch Deflection Isolator Weights91
Two Inch Deflection, Isolator Installation and Adjustment92
Figure 42 - Two Inch Deflection Isolator92
Two Inch Deflection, Restrained Spring Isolator Specifications93
Figure 43 - Two Inch Deflection Isolator Specifications93
Table 15 - Two Inch Deflection Isolator Weights93
Section 6 - Commissioning94
Preparation94
Figure 44 - LED Indicator Buttons95
Figure 45 - Flow Switch Set96
Figure 46 - Flow below the Representation Range96
Figure 47 - Flow Exceeds the Representation Range96
First Time Startup97
General Operation97
Freeze Damage Protection97
Table 16 - YVAA Freeze Damage Protection Requirements98
Section 7 - Operation99
Operating Controls99
Figure 48 - Keyboard and Display99
Basic Operating Sequence101
Unit Warning102
Microboard (331-03478-XXX)102
Figure 49 - New 331-03478-XXX Microboard104
SC-EQ Communications Card105
SC-EQ Communication Card Interface IPU3105
Table 17 - YVAA SC-EQ BAS Points List106
Program Update111
Data Logging112
Unit Safeties113
System Safeties, Faults114
Table 18 - Low Differential Oil Pressure Cutout116
Table 19 - Discharge Pressure Load Limiting/Unloading117
Table 20 - Suction Pressure Load Limiting/Unloading117
Table 21 - Start Inhibit Sensor Thresholds118
Section 8 - Micropanel119
Figure 50 - Micropanel119
Unit Data Key122
Figure 51 - Unit Data Key122
System Data Keys 1 through 4124
Figure 52 - System Data Keys 1 through 4124
Table 22 - Sensor Minimum and Maximum Outputs126
VSD Data Key127
Figure 53 - VSD Data Key127
Table 23 - Compressor Overload Settings128
Operating Hours/Start Counter Key129
Figure 54 - Operating Hours/Start Counter Key129
History Key130
Figure 55 - History Key130
Setpoints Key137
Figure 56 - Setpoints Key137
Table 24 - Setpoint Limits138
Program Key139
Figure 57 - Program Key139
Table 25 - Programmable Operating Parameters141
Unit Setup Mode142
Table 26 - Setup Mode Programmable Values142
Options Key149
Figure 58 - Options Key149
Date/Time and Schedule Keys152
Figure 59 - Date/Time and Schedule Key152
Manual Override Key155
Figure 60 - Manual Override Key155
Print Key156
Figure 61 - Print Key156
Table 27 - Printout Types156
System Switches Key159
Figure 62 - System Switches Key159
Section 9 - Maintenance161
General Requirements161
Leak Testing During Operation162
Vapor Connection Locations162
Checking the System for Leaks162
Leak Testing162
Figure 63 - Service Connections162
System Pressure Test163
Conducting the Gas Pressure Hold Test163
What to Do Next163
Conducting the Soap Visual Gas Leak Test163
Figure 64 - Leak Test Hold Times163
Conducting the Optional Trace Gas Leak Test164
System Evacuation165
Vacuum Dehydration165
Figure 65 - Evacuation of the Chiller Operation165
Dehydration166
Table 28 - System Pressures166
Conducting the Dehydration Process167
Figure 66 - Saturation Curve167
Result168
Conducting the Final Evacuation168
Refrigerant Charging168
Table 29 - R-134A Pressure to Saturated Temperature Conversion169
Table 30 - R-513A Pressure to Saturated Temperature Conversion170
Removing the Refrigerant Charge for Service171
Checking and Trimming the Refrigerant Charge172
Definitions172
Checking the Refrigerant Charge During Unit Shutdown172
Microchannel Coil Cleaning173
Cleaning Procedure Required for Standard and Environment Guard Microchannel Coils173
Cleaning Procedure for Environment Guard Premium Microchannel Coils173
Steps to Touch-Up Small Sections of the Finned Coil Surface174
Steps to Touch-Up End (Dead) Tubes And/Or Condenser Coil Headers174
Materials Required174
Chilled Liquid System Maintenance175
Table 31 - Part Numbers175
Maintenance Requirements for YVAA Chillers177
Table 32 - Troubleshooting Guide178
R-134A Conversion Table181
Table 33 - R-134A Pressure to Saturated Temperature Conversion181
R-513A Conversion Table182
Table 34 - R-513A Refrigerant Pressure to Saturated Temperature182
R-513A Conversion Table183
Table 35 - R-513A Refrigerant Temperature to Pressure183
Table 36 - Temperature Input Voltage Sensor (Measured Signal to Shield at the Sensor)184
Table 37 - Outside Air Temperature Sensor Input Voltage, Measured Signal to Shield at the Sensor185
Table 38 - Pressure Transducer Output Voltage, Measured Signal to Return at the Transducer186
Table 39 - Motor Temperature Sensor Resistance (Check at the Motor)187
Section 10 - Decommissioning, Dismantling, and Disposal189
Table 40 - si Metric Conversion190

York YVAA - Page 192

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