Name: York YVAA
Brand: York
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AIR-COOLED SCREW

LIQUID CHILLERS

INSTALLATION, OPERATION, MAINTENANCE

Supersedes: 201.28-NM1.1 (1117) Form 201.28-NM1.1 (118)

HFC-134A OR R-513A

LD15045

150 - 500 TONS

525 - 1750 KW

2 COMPRESSOR

50 AND 60 HZ

MODEL YVAA STYLE A

AIR-COOLED SCREW LIQUID CHILLERS WITH

VARIABLE SPEED DRIVE

FRAME SIZES 015 - 052

035-23219-100

Issue Date:

January 31, 2018

Default Chapter5
- Table of Contents5
Section 1 - General Chiller Information and Safety13
- Introduction13
- Warranty13
- Quality Assurance and Safety14
- Fluorinated Greenhouse Gases14
- Responsibility for Safety14
- About this Manual14
- Misuse of Equipment14
FIGURE 1 - YVAA Air-Cooled Screw Liquid Chiller with Variable Speed Drive17
Section 2 - Product Description17
- General System Description17
- Condenser19
- Electrical19
- Evaporator19
- Refrigerant Circuit19
- Semi-Hermetic YORK Twin-Screw Compressors19
- Building Automation System Capabilities20
- Microcomputer Control Center20
  - Display Data20
  - Programmable Setpoints20
Section 3 - Rigging, Handling and Storage25
- Lifting Weights25
- Delivery and Storage25
- Inspection26
- Moving the Chiller26
- Unit Removal from Shipping Container26
- Lifting Using Lugs26
- Lifting Using Shackles26
TABLE 1 - Unit Rigging28
Section 4 - Installation37
- Location Clearances37
  - Recommended Minimum Clearances38
- Location Requirements37
- Outdoor Installations37
- TABLE 2 - Minimum Evaporator Tube Removal Clearance38
- FIGURE 4 - Acceptable Minimum Clearances Around/Between Unit(S)38
- Chilled Liquid Piping39
  - General Requirements39
- Shipping Braces39
- Vibration Isolators39
  - Installation39
- Evaporator Pressure Drop40
- Pipework Arrangement41
- Water Treatment41
FIGURE 16 - Customer Control Connections50
TABLE 4 - Electrical Lug Data52
Section 5 - Technical Data63
- Nomenclature63
- TABLE 5 - Physical Data - Microchannel Coil64
- TABLE 6 - Physical Data - Round Tube Coil68
- TABLE 7 - Optional One-Pass Evaporator70
- TABLE 8 - Standard Two-Pass, Rear Inlet/Outlet Evaporator74
- TABLE 9 - Optional Three-Pass Rear Inlet/Front Outlet Evaporator78
- FIGURE 17 - YVAA Dimensions82
- TABLE 10 - Isolator Selection and Mounting Locations84
- Elastomeric Isolator Installation90
- Elastomeric Isolator Specifications91
- One Inch Deflection Isolator Installation92
- One Inch Deflection Spring Isolator Specifications93
  - CPX-XX-XXX93
- Two Inch Deflection Isolator Installation and Adjustment94
- Two Inch Deflection, Restrained Spring Isolator Specifications95
  - Y2RSI-XX-XXX95
Section 6 - Commissioning97
- Preparation97
- First Time Start up99
- General Operation100
  - Operation in Sub-Freezing Conditions100
  - Unit Maintenance and Shutdown in Sub-Freezing Conditions100
- FIGURE 18 - Keyboard and Display101
- Anti-Recycle Timer102
- Display102
- Evaporator Pump Control102
- Keypad Data Entry Mode102
- Alarms103
- Basic Operating Sequence103
  - Start Sequence and Loading103
- Chiller Run Contact103
- Evaporator Heater Control103
- Flow Switch Control103
- Remote Run / Stop103
- Unit Warning103
  - Unit Warning Operation103
  - Low Battery Warning103
- Microboard (331-03478-XXX)104
Section 7 - Operation101
- Operating Controls101
  - Unit Switch101
  - Keypad101
- FIGURE 19 - New 331-03478-XXX Microboard105
- Building Automation System (BAS) Communications106
  - Using Communications Protocol106
- E-Link or SC-EQ Interface107
- TABLE 12 - Real Time Error Numbers for BAS, SC-EQ or E-Link Communications Card109
- FIGURE 20 - LON E-Link Gateway Option110
- SC-EQ or E-Link BAS Communications Card110
TABLE 21 - Start Inhibit Sensor Thresholds125
Section 8 - Micropanel127
TABLE 22 - Sensor Min/Max Outputs134
TABLE 23 - Compressor Motor Overload Settings136
TABLE 24 - Setpoint Limits146
TABLE 25 - Programmable Operating Parameters149
TABLE 26 - Printout Types157
Section 9 - Maintenance161
- General Requirements161
- Refrigerant Removal, Evacuation and Charging a YVAA Chiller162
- Microchannel Coil Cleaning163
  - Scheduled Maintenance163
- Maintenance Requirements for YVAA Chillers164
- R-513A Conversion Table168
TABLE 29 - R-513A Refrigerant Temperature to Pressure169
TABLE 30 - Temperature Input Voltage Sensor (Measured Signal to Shield at the Sensor)170
TABLE 31 - Outside Air Temperature Sensor Input Voltage (Measured Signal to Shield at the Sensor)171
TABLE 32 - Pressure Transducer Output Voltage (Measured Signal to Return at the Transducer)172
TABLE 33 - Motor Temperature Sensor Resistance (Check at the Motor)173
Section 10 - Decommissioning, Dismantling and Disposal175
TABLE 34 - si Metric Conversion176

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York YVAA Specifications

General

Refrigerant	R-134a
Condenser	Water-cooled
Compressor Type	Screw
Efficiency	High
Operating Voltage	380V/3/60Hz
Weight	Varies with model; consult factory
Dimensions	Varies with model; consult factory

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