York YLAA0142 User Manual

YLAA0041 – YLAA0230
Air-Cooled Scroll Chillers
With Brazed Plate Heat Exchanger
Style B (60 HZ) 4–12 Fan
40 ton to 230 ton
140 kW to 800 kW
R-410A
Issue Date:
August 3, 2022
Air-Cooled Scroll Chiller
Installation, Operation,
Maintenance
Supersedes: 150.72-ICOM6 (221) Form 150.72-ICOM6 (822)
Products are produced at a
f aci lit y who s e qua l it y -
management systems are
ISO9001 certified.
035-23572-100

York YLAA0142 Specifications

General

Brand	York
Model	YLAA0142
Category	Chiller
Language	English

Summary

Air-Cooled Scroll Chiller

Installation, Operation, Maintenance

Covers the core procedures for using and maintaining the chiller.

General Safety Guidelines

Safety Symbols

Explains the meaning of various safety alert symbols used in the document.

Nomenclature

Warranty

Safety and Quality

Responsibility for Safety

Misuse of Equipment

Structural Support

Requirements for proper unit mounting to prevent injury or damage.

Electrical Safety

Critical safety instructions for electrical connections and maintenance.

Rotating Parts

Emergency Shutdown

Brazed Plate Evaporator

Control Center

Oper Data Key

Sound Attenuation

Compressor Acoustic Sound Blanket

Describes sound blankets enclosing each compressor for noise reduction.

Ultra Quiet Fans

Details the use of lower RPM motors and steeper-pitch fans for reduced noise.

Product Identification Number (PIN)

TABLE 2 - COMPLETE PIN NUMBER DESCRIPTION (CONT’D)

Figure 6 - PROCESS AND INSTRUMENTATION DIAGRAM

Rigging and lifting should only be done by a professional rigger...

Inspection

Moving the Chiller

Lifting Using Lugs

Lifting Using Shackles

Installation Checklist

Foundation

Requirements for a stable foundation capable of supporting the unit's operating weight.

Startup/Commissioning

Location and Clearances

Chilled Liquid Piping

Wiring

Field Wiring

Guidance on power wiring connections, fused disconnect switches, and wire types.

High Pressure Cutout

Alarm Status Contacts

Remote Start/Stop Contacts

Remote Emergency Cutoff

Remote Temp Reset Input

Load Limit Input

Specification of Water

Thermal Dispersion Flow Switch

Operational Limitations

Table 4 - TEMPERATURES AND FLOWS

Data table showing minimum, maximum, and nominal temperatures and water flows for various models.

Table 6 - PHYSICAL DATA (ENGLISH) 60 HZ

TABLE 6 - PHYSICAL DATA (ENGLISH) 60 HZ (CONT’D)

ELECTRICAL DATA

Table 11 - ELECTRICAL DATA WITHOUT PUMPS

TABLE 11 - ELECTRICAL DATA WITHOUT PUMPS (CONT’D)

ELECTRICAL NOTES

ELECTRICAL NOTES AND LEGEND

ELECTRICAL NOTES AND LEGEND (CONT’D)

WIRING DIAGRAMS

Figure 16 - ELEMENTARY WIRING DIAGRAM

Diagram showing the basic electrical connections for the unit's control system.

FIGURE 16 - ELEMENTARY WIRING DIAGRAM (CONT’D)

Figure 17 - ELEMENTARY WIRING DIAGRAM

FIGURE 17 - ELEMENTARY WIRING DIAGRAM (CONT’D)

FAN WIRING

FIGURE 18 - FAN WIRING, STANDARD AIR FLOW (CONT’D)

FAN WIRING, HIGH AIR FLOW

FIGURE 19 - FAN WIRING, HIGH AIR FLOW (CONT’D)

PUMP WIRING

FIGURE 21 - PUMP WIRING (CONT’D)

CONNECTION - EEV OPTION

COMPRESSOR WIRING

Figure 23 - COMPRESSOR WIRING

Diagram illustrating compressor wiring connections.

FIGURE 23 - COMPRESSOR WIRING (CONT’D)

POWER OPTIONS CONNECTION DIAGRAM

FIGURE 24 - POWER OPTIONS CONNECTION DIAGRAM (CONT’D)

POWER PANEL

FIGURE 25 - POWER PANEL (CONT’D)

MICRO PANEL CONNECTIONS

Figure 26 - MICRO PANEL CONNECTIONS

Diagram illustrating micro panel connections to various modules and ports.

FIGURE 26 - MICRO PANEL CONNECTIONS (CONT’D)

FOUR FAN UNITS

FOUR FAN UNITS DIMENSIONS – YLAA0070SE, YLAA0080SE, YLAA0089SE

FIVE FAN UNITS

SIX FAN UNITS

EIGHT FAN UNITS

TEN FAN UNITS

TWELVE FAN UNITS

WEIGHT DISTRIBUTION AND ISOLATOR MOUNTING POSITIONS

CLEARANCES

Figure 35 - UNIT CLEARANCES – ALL MODELS

Diagram illustrating minimum clearance requirements for all YLAA unit models.

ISOLATOR INFORMATION

1 IN. DEFLECTION SPRING ISOLATORS INSTALLATION INSTRUCTIONS

2 IN. DEFLECTION ISOLATOR CROSS-REFERENCE

2 IN. DEFLECTION SPRING ISOLATORS INSTALLATION AND ADJUSTMENT

NEOPRENE ISOLATOR CROSS-REFERENCE

INSTALLATION OF NEOPRENE VIBRATION ISOLATORS

Commissioning of this unit should only be carried out by Johnson Controls Authorized personnel.

PREPARATION – POWER OFF

Refrigerant Charge

Charging Refrigerant

Detailed steps for safely charging the refrigerant into the system after vacuuming.

Temperature Sensor(s)

Compressor Heaters

Power Connections

Grounding

Compressor Oil

Supply Voltage

Water System

Sporlan EEV Interface Board

F/ Protection

PREPARATION – POWER ON

COMMISSIONING THE PUMP VFD

Programming the Drive

Setting up the ABB ACS255 VSD for the Low Ambient Kit

Table 13 - DRIVE PROGRAMMING PARAMETERS

Setting the Adjustable Breaker

DETERMINING PROPER OIL LEVELS

INSTALLATION CHECKLIST

A. PRE-STARTUP Unit Checks (No Power)

Pre-startup checks that must be performed with the unit power OFF.

B. COMPRESSOR HEATER (Power On - 24 Hours Before Start)

Instructions for applying power to compressor heaters 24 hours before startup.

START-UP CHECKLIST

Panel checks (Power On - Both Unit Switch Off )

Checks to perform on the control panel with the unit switch off.

CHECKING SUPERHEAT AND SUBCOOLING

LEAK CHECKING

IPU II AND I/O BOARDS

Keypad

STATUS KEY

Unit Status

Describes how to interpret status messages, categorized into General Status and Fault Status.

System Safeties

Information on safety faults that cause individual system shutdowns.

System X Dsch Limiting

System X Suction Limiting

System X Percentage Load Limiting

Manual Override Status

System X Pumping Down (on shutdown)

Unit Safeties

UNIT FAULT: LOW AMBIENT TEMP

Safety shutdown due to low outdoor ambient temperature.

UNIT FAULT: LOW LIQUID TEMP

Safety shutdown due to low leaving chilled liquid temperature, preventing freeze-up.

UNIT FAULT: 115VAC UNDER VOLTAGE

Safety shutdown triggered by low voltage to the micro panel, preventing system damage.

UNIT FAULT: HIGH MTR CURR

Safety shutdown due to high motor current or sensor readings.

Resetting System Lockout Faults

System Safety

Discharge Pressure Cutout

Details on programmable and mechanical discharge pressure cutouts for system protection.

Suction Pressure Cutout

Explains the suction pressure cutout's role in preventing evaporator freeze-up.

Motor Protector/High Pressure Cutout Fault

Motor Protector/High Pressure Cutout Inhibit

High Motor Current

Low Superheat Cutout (EEV Mode Only)

Sensor Failure Cutout (EEV Mode Only)

Anti-Vacuum Low Pressure Cutout

Fault and Inhibit Codes and Reset

Table 14 - YLAA FAULT AND INHIBIT CODES

STATUS KEY MESSAGES QUICK REFERENCE LIST

Figure 41 - STATUS KEY MESSAGES QUICK REFERENCE LIST

Visual guide to status messages, categorized by type (General, Fault, Safeties).

DISPLAY/PRINT KEYS

Oper Data Key

Functionality of the OPER DATA key for viewing system operating parameters.

History Displays

DISCHARGE PRESSURE CUTOUT = XXXX PSIG

Displays the programmed discharge pressure cutout value.

SUCTION PRESSURE CUTOUT = XXXX PSIG

Displays the programmed suction pressure cutout value.

LOW AMBIENT TEMP CUTOUT = XXX.X °F

Displays the programmed low ambient temperature cutout value.

LEAVING LIQUID TEMP CUTOUT = XXX.X °F

FAN CONTROL ON PRESSURE = XXX PSIG

FAN DIFFERENTIAL OFF PRESSURE = PSIG

SYS 1 TRIP VOLTS = X.X VOLTS

SYS 2 TRIP VOLTS = X.X VOLTS

ENTRY KEYS

Enter/Adv Key

Importance of the ENTER/ADV key for saving changes to setpoints and other parameters.

SETPOINTS KEYS

Cooling Setpoints

Instructions for programming the cooling setpoint and range using the COOLING SETPOINTS key.

Leaving Chilled Liquid Control

Illustrates the display for setting the chilled liquid temperature and range.

Return Chilled Liquid Control

Remote Setpoint Control

SCHEDULE/ADVANCE DAY KEY

Table 16 - COOLING SETPOINT, PROGRAMMABLE LIMITS, AND DEFAULTS

PROGRAM KEY

DISCHARGE PRESSURE CUTOUT = 395 PSIG

Display for setting the discharge pressure cutout value.

SUCTION PRESSURE CUTOUT = 80.0 PSIG

Display for setting the suction pressure cutout value.

LOW AMBIENT TEMP CUTOUT = 25.0 °F

LEAVING LIQUID TEMP CUTOUT = 36.0 °F

ANTI-RECYCLE TIMER = 600 SEC

SYS X TRIP VOLTS = X.X VOLTS

UNIT TRIP VOLTS = X.X VOLTS

Table 17 - PROGRAM KEY LIMITS AND DEFAULT

Quick Reference Programming Chart Setpoints Section

Figure 43 - SETPOINTS QUICK REFERENCE LIST

Service Mode

Table 18 - PROGRAM KEY LIMITS AND DEFAULT

Selecting Low Temperature

UNIT KEYS

Options Key

How to scroll through and change user programmable options.

Option 3 – Ambient Control Type

Option 4 – Local/Remote Control Type

Option 5 – Unit Control Mode

Option 7 – Lead/Lag Type (two system units only)

Option 8 – Condenser Fan Control Mode

Option 9 – Manual Override Mode

Option 11 – Power Fail Restart

Option 12 – Soft Start Enable/Disable

Option 13 – Unit Type

Option 14 – Refrigerant Type

Option 15 – Expansion Valve Type

Option 16 – Flash Card Update

Option 17 – Remote Temperature Reset

Option 18 – Pump Control

Option 20 – Hot Gas Bypass Type

Option 21 – Flash Card Data Logging

Option 22 – Temperature Sensors Enable

Option 23 – Variable Water Outlet Mode

Clock

Figure 44 - UNIT KEYS OPTIONS PROGRAMMING QUICK REFERENCE LIST

BACNET, MODBUS, N2, AND YORKTALK 2 COMMUNICATIONS

Table 19 - MINIMUM, MAXIMUM AND DEFAULT VALUES

Table 20 - VALUES REQUIRED FOR BAS COMMUNICATION

BACnet and Modbus Communications

How to read and modify data using BACnet or Modbus register addresses.

Table 22 - NATIVE BACNET, MODBUS AND N2 COMMUNICATIONS DATA MAP

TABLE 22 - NATIVE BACNET, MODBUS AND N2 COMMUNICATIONS DATA MAP (CONT’D)

YorkTalk 2 Communications

Table 23 - YORKTALK 2 COMMUNICATIONS DATA MAP

TABLE 23 - YORKTALK 2 COMMUNICATIONS DATA MAP (CONT’D)

Unit Operating Sequence

CAPACITY CONTROL

SUCTION PRESSURE LIMIT CONTROLS

DISCHARGE PRESSURE LIMIT CONTROLS

LEAVING CHILLED LIQUID CONTROL

LEAVING CHILLED LIQUID CONTROL OVERRIDE TO REDUCE CYCLING

Table 24 - SAMPLE COMPRESSOR STAGING FOR RETURN WATER CONTROL

LEAVING CHILLED LIQUID SYSTEM LEAD/LAG AND COMPRESSOR SEQUENCING

RETURN CHILLED LIQUID SYSTEM LEAD/LAG AND COMPRESSOR SEQUENCING

ANTI-RECYCLE TIMER

ANTI-COINCIDENCE TIMER

EVAPORATOR PUMP CONTROL AND YORK HYDRO KIT PUMP CONTROL

EVAPORATOR HEATER CONTROL

PUMPDOWN CONTROL

STANDARD CONDENSER FAN CONTROL

VSD FAN

CHANGING THE SWITCH POINT OF THE THERMAL DISPERSION FLOW SWITCH

Table 25 - YLAA STANDARD CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY (2, 3, OR 4 FANS PER SYSTEM)

Table 26 - YLAA STANDARD CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY (5 OR 6 FANS PER SYSTEM)

LOAD LIMITING

Table 27 - COMPRESSOR OPERATION LOAD LIMITING

COMPRESSOR RUN STATUS

ALARM STATUS

REMOTE BAS/EMS TEMPERATURE RESET USING A VOLTAGE OR CURRENT SIGNAL

SERVICE MODE – OUTPUTS

CLEARING HISTORY BUFFERS

RESETTING SYSTEM LOCKOUT FAULTS

SERVICE MODE

SERVICE MODE – CHILLER CONFIGURATION

How to access and modify chiller configuration settings like refrigerant type and expansion valve.

SERVICE MODE – ANALOG AND DIGITAL INPUTS

How to view analog and digital inputs on the microboard for diagnostics.

CONTROL INPUTS/OUTPUTS

CHECKING INPUTS AND OUTPUTS

Digital Inputs

Analog Inputs – Temperature

Table 33 - ENTERING/LEAVING CHILLED LIQUID TEMP. SENSOR, TEMPERATURE/VOLTAGE CORRELATION

Analog Inputs – Pressure

Table 34 - PRESSURE TRANSDUCERS

Digital Outputs

Data Logging to Flash

Enabling Data Logging to Flash

Table 35 - DATA LOGGING TO FLASH

TABLE 35 - DATA LOGGING TO FLASH (CONT’D)

TROUBLESHOOTING

Table 36 - TROUBLESHOOTING

Lists common problems, their causes, and recommended solutions for troubleshooting.

TABLE 36 - TROUBLESHOOTING (CONT’D)

SECTION 10 – MAINTENANCE

COMPRESSORS

Maintenance procedures for compressors, including oil level checks and oil analysis.

MICROCHANNEL COIL CLEANING

Cleaning Procedure Required for Standard and Environment Guard Microchannel Coils

Cleaning Procedure for Environment Guard Premium Microchannel Coils

OPERATING PARAMETERS

THERMAL DISPERSION FLOW SWITCH

BRAZED PLATE HEAT EXCHANGER (EVAPORATOR) HEATER

OVERALL UNIT INSPECTION

R-410A PRESSURE TEMPERATURE CHART