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York YLAA0080 User Manual

York YLAA0080
206 pages
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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

Table of Contents

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York YLAA0080 Specifications

General IconGeneral
BrandYork
ModelYLAA0080
CategoryChiller
LanguageEnglish

Summary

Air-Cooled Scroll Chillers

General Safety Guidelines

SECTION 1 – GENERAL CHILLER INFORMATION AND SAFETY

WARRANTY

Details Johnson Controls' warranty terms, coverage, and conditions for the equipment.

MISUSE OF EQUIPMENT

Details restrictions on equipment application, operation, and structural support to prevent misuse.

SECTION 3 – HANDLING AND STORAGE

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

Emphasizes that rigging and lifting must be performed by a professional rigger with a written plan.

SECTION 4 – INSTALLATION

INSTALLATION CHECKLIST

Provides a step-by-step checklist to be performed before placing the units in operation.

STARTUP/COMMISSIONING

Outlines the detailed procedures required for installing and starting up the chiller.

LOCATION AND CLEARANCES

Guides on selecting the installation location and maintaining proper clearances for air circulation and servicing.

CHILLED LIQUID PIPING

Provides general guidelines for connecting chilled liquid piping, emphasizing cleanliness and proper support.

WIRING

Covers field wiring requirements for power and control wiring, emphasizing NEC compliance and copper conductors.

Specification of Water

Details requirements for water quality to prevent BPHE clogging, damage, or freezing.

Thermal Dispersion Flow Switch

Explains the operating principle, service information, and wiring of the thermal dispersion flow switch.

SECTION 5 – TECHNICAL DATA

OPERATIONAL LIMITATIONS

Lists operational limitations, including temperature and flow rates for various chiller models.

ELECTRICAL DATA

Crucial for installation and safety, details electrical data for unit components.

Voltage Limitations

Outlines absolute voltage limitations that must not be exceeded to prevent compressor damage.

ELECTRICAL NOTES

Provides essential notes and definitions regarding electrical connections, circuit protection, and wiring practices.

ELECTRICAL NOTES AND LEGEND

Explains designations and descriptions for various electrical components and wiring items.

ELECTRICAL NOTES AND LEGEND (CONT’D)

Continues the explanation of electrical notes, symbols, and component references.

WIRING DIAGRAMS

Critical for installation and troubleshooting, this section presents wiring diagrams.

ELEMENTARY WIRING DIAGRAMS

Presents elementary wiring diagrams for various system configurations and power supplies.

POWER PANEL

Details the layout and connections within the power panel for various electrical components.

MICRO PANEL CONNECTIONS

Illustrates the connections to the micro panel, including terminal blocks and external interfaces.

WEIGHT DISTRIBUTION AND ISOLATOR MOUNTING POSITIONS

Critical for installation planning and structural support, this section details weight distribution.

CLEARANCES

Critical for performance, operation, and maintenance, this section details required clearances.

2 IN. DEFLECTION ISOLATOR INSTALLATION AND ADJUSTMENT

Provides installation and adjustment instructions for 2-inch deflection isolators, including limit stop nuts.

INSTALLATION OF NEOPRENE VIBRATION ISOLATORS

Critical installation procedure detailing steps for installing neoprene vibration isolators.

SECTION 6 – COMMISSIONING

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

States that commissioning must be performed by authorized Johnson Controls personnel.

PREPARATION – POWER OFF

Lists essential pre-commissioning checks to be performed with the unit power OFF.

Refrigerant Charge

Details procedures for checking and charging the refrigerant, emphasizing proper techniques and safety.

Charging Refrigerant

Provides a step-by-step guide for charging the refrigerant after vacuuming the system.

Power Connections

Instructs to check the correct connection and tightness of customer power cables to terminal blocks.

Grounding

Verifies the correct connection of the unit's protective ground terminals and internal ground connections.

Compressor Oil

Provides steps for adding compressor oil, specifying pump usage and oil level checks.

Supply Voltage

Emphasizes verifying the site voltage supply corresponds to unit requirements and limits.

PREPARATION – POWER ON

Outlines the procedure for powering on the chiller after all pre-startup checks are completed.

Programming the Drive

Provides instructions for accessing Service Mode and programming the drive parameters.

Setting up the ABB ACS255 VSD for the Low Ambient Kit

Guides on setting up the ABB ACS255 VSD for low ambient conditions, referring to the manual for details.

Setting the Adjustable Breaker

Details how to set the adjustable breaker's trip settings based on the chiller's nameplate information.

DETERMINING PROPER OIL LEVELS

Critical for compressor health and longevity, this section provides oil level charts for compressor sets.

INSTALLATION CHECKLIST

An essential pre-operation validation checklist covering unit checks, piping, electrical, and sensors.

A. PRE-STARTUP

Lists initial checks performed on the unit without power, focusing on damage, piping, leaks, and valves.

START-UP CHECKLIST

Covers post-power checks for initial operation, including panel status, voltage, setpoints, and fan rotation.

B. COMPRESSOR HEATER

Details the procedure for applying power to compressor heaters 24 hours before startup.

A. STARTUP

Guides through startup procedures including power checks, voltage verification, setpoint programming, and compressor rotation.

Panel checks (Power On - Both Unit Switch Off )

Details checks on the panel with power applied but unit switches off, focusing on voltage and setpoints.

A. CHECKING SUPERHEAT AND SUBCOOLING

Critical for system performance and compressor protection, this section details subcooling and superheat adjustment.

B. LEAK CHECKING

Critical for system integrity and safety, this section instructs on performing leak checks.

SECTION 7 – UNIT CONTROLS

STATUS KEY

Primary method for monitoring unit condition, explaining the STATUS key usage.

Unit Status

Explains how to use the STATUS key to determine chiller operating status, including running, demand, fault, and cycling.

S Y S 1 L O W S U C T P R E S S

Details the low suction pressure cutout safety, its purpose, and how it functions.

S Y S 1 M P / H P C O F A U L T

Explains the Motor Protector/High Pressure Cutout Fault, indicating compressor overheating or high pressure.

System Safeties

Defines system safeties as faults that shut down individual systems due to exceeded thresholds.

Unit Safeties

Defines unit safeties as faults that shut down all running compressors.

U N I T F A U L T : L O W A M B I E N T T E M P

Explains the Low Ambient Temperature Cutout safety for protecting the chiller in low ambient conditions.

U N I T F A U L T : L O W L I Q U I D T E M P

Describes the Low Leaving Chilled Liquid Temp Cutout safety to prevent evaporator freeze-up.

U N I T F A U L T : 1 1 5 V A C U N D E R V O L T A G E

Explains the Under Voltage Safety, ensuring system protection against low voltage conditions.

U N I T F A U L T : H I G H M T R C U R R

Details the High Motor Current safety, triggered by sensor readings outside the normal range.

Resetting System Lockout Faults

Crucial troubleshooting step for system recovery, detailing manual reset procedures.

System Safety

Defines system safeties and their auto-reset or manual reset behavior.

Discharge Pressure Cutout

Explains the discharge pressure cutout, its programmable nature, and restart conditions.

Suction Pressure Cutout

Details the suction pressure cutout, its role in preventing evaporator freeze-up, and its operational logic.

Motor Protector/High Pressure Cutout Fault

Explains the Motor Protector/High Pressure Cutout Fault, its causes, and system behavior.

Low Superheat Cutout (EEV Mode Only)

Critical safety feature for EEV systems, describing the low superheat cutout safety.

Sensor Failure Cutout (EEV Mode Only)

Critical safety feature for EEV systems, explaining the sensor failure cutout safety.

Fault and Inhibit Codes and Reset

Crucial for troubleshooting, this section refers to tables showing fault codes and reset methods.

DISPLAY/PRINT KEYS

Primary user interface for monitoring, explaining the use of Display/Print keys.

Oper Data Key

Key for accessing operational data, describing how to access and scroll through data screens.

History Printout

Crucial for troubleshooting past events, this section explains how to access and interpret historical shutdown data.

History Displays

Details how to navigate and interpret the historical shutdown data displayed via the HISTORY key.

ENTRY KEYS

Primary interface for programming, introducing the Entry Keys (UP, DOWN, ENTER/ADV).

Enter/Adv Key

Explains the function of the ENTER/ADV key for saving changes and advancing to the next parameter.

SETPOINTS KEYS

Key for configuring operational parameters, introducing keys for setpoints, schedules, and safeties.

Cooling Setpoints

Guides on programming the Cooling Setpoint and Range for leaving or return chilled liquid control.

Leaving Chilled Liquid Control

Specific control mode description illustrating the setpoint and range display.

Return Chilled Liquid Control

Explains the setpoint and range display for Return Chilled Liquid Control.

SCHEDULE/ADVANCE DAY KEY

Key for time-based operation scheduling, guiding on setting daily and holiday schedules.

PROGRAM KEY

Key for accessing programmable parameters, explaining how to change setpoints.

DISCHARGE PRESSURE CUTOUT

Details the programmable discharge pressure cutout and its function as a software backup.

SUCTION PRESSURE CUTOUT

Explains the suction pressure cutout for preventing evaporator freeze-up.

LOW AMBIENT TEMP. CUTOUT

Describes the low ambient temperature cutout for protecting the chiller in low ambient conditions.

LEAVING LIQUID TEMP. CUTOUT

Explains the leaving liquid temperature cutout to prevent evaporator freeze-up.

Service Mode

Crucial for advanced configuration and troubleshooting, explains how to enter and use Service Mode.

UNIT KEYS

Primary interface for unit-level operations, introducing keys for options and system switches.

Options Key

Key for accessing programmable options, explaining how to scroll and change them.

Option 13 – Unit Type

Critical configuration for correct operation, emphasizing "Liquid Chiller" display and jumper setting.

Unit Keys setpoints

Provides a quick reference list for unit setpoints accessible through the Unit Keys.

BACNET, MODBUS, N2, AND YORKTALK 2 COMMUNICATIONS

Crucial for system integration and control, explains reading/modifying data via serial communication protocols.

BACnet and Modbus Communications

Details for integration, outlining read/modify capabilities for BACnet or Modbus registers and addresses.

SECTION 8 – UNIT OPERATION

Unit Operating Sequence

Describes the step-by-step process of chiller operation from power application to compressor staging.

CAPACITY CONTROL

Explains how the chiller regulates cooling by evaluating temperatures and staging compressors.

SUCTION PRESSURE LIMIT CONTROLS

Critical safety and performance feature preventing low-pressure cutouts by unloading the system.

DISCHARGE PRESSURE LIMIT CONTROLS

Critical safety and performance feature unloading the system before safety limits are reached.

LEAVING CHILLED LIQUID CONTROL

Details how setpoint and range control leaving chilled liquid temperature, including compressor staging.

LOAD LIMITING

Key feature for managing capacity and preventing overload, detailing stages and compressor limits.

SECTION 9 – SERVICE AND TROUBLESHOOTING

RESETTING SYSTEM LOCKOUT FAULTS

Crucial troubleshooting step for system recovery, detailing manual reset procedures.

SERVICE MODE

Crucial for advanced configuration and troubleshooting, explains how to enter and use Service Mode.

SERVICE MODE – CHILLER CONFIGURATION

Critical for setting up the unit correctly, details configuration selections for refrigerant and valve types.

TROUBLESHOOTING

Core function of this section, providing a table of common problems, causes, and solutions.

SECTION 10 – MAINTENANCE

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