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York YLAA0048 User Manual

York YLAA0048
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 YLAA0048 Specifications

General IconGeneral
BrandYork
ModelYLAA0048
CategoryChiller
LanguageEnglish

Summary

SECTION 1 – GENERAL CHILLER INFORMATION AND SAFETY

WARRANTY

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

SAFETY AND QUALITY

Information on compliance with safety standards and quality certifications for YLAA chillers.

MISUSE OF EQUIPMENT

Details improper uses and operations that may result in injury or equipment damage.

General Safety Precautions

Covers safety for rotating parts, sharp edges, refrigerants, cleaning, and emergency shutdown.

SECTION 3 – HANDLING AND STORAGE

Rigging and Lifting Label

Advises reading the warning label on the chiller packaging for rigging and lifting instructions.

MOVING THE CHILLER

Provides instructions and warnings for safely moving the chiller unit, emphasizing lifting points.

SECTION 4 – INSTALLATION

INSTALLATION CHECKLIST

Lists essential tasks to perform before placing the units in operation to ensure warranty coverage.

STARTUP/COMMISSIONING

Outlines detailed procedures to be followed for unit installation and start-up.

CHILLED LIQUID PIPING

Provides general guidelines and precautions for connecting the chilled liquid piping system.

WIRING

Details field wiring requirements for power and control connections, including wire types.

Electrical Connections and Control Inputs/Outputs

Covers relief valves, pressure cutouts, pump/alarm contacts, and remote control inputs.

Specification of Water

Details requirements for water quality to prevent clogging and damage to the BPHE.

SECTION 5 – TECHNICAL DATA

OPERATIONAL LIMITATIONS

Lists critical operational limitations for temperatures, water flows, and pressures for YLAA units.

WIRING DIAGRAMS

Illustrates elementary wiring diagrams for fans, pumps, compressors, controls, and power options.

SECTION 6 – COMMISSIONING

Charging Refrigerant

Step-by-step guide for charging the refrigerant into the system after vacuuming.

COMMISSIONING THE PUMP VFD

Provides steps for commissioning the Variable Frequency Drive (VFD) for the pump and setting parameters.

Setting the Adjustable Breaker

Guides on setting the adjustable breaker's trip settings based on the nameplate information.

START-UP CHECKLIST

Provides a checklist of installation tasks and pre-startup checks to be completed before operation.

CHECKING SUPERHEAT AND SUBCOOLING

Details how to calculate and verify superheat and subcooling for proper system adjustment.

LEAK CHECKING

Outlines the process for checking the system for refrigerant leaks to ensure no leaks are apparent.

SECTION 7 – UNIT CONTROLS

SECTION 8 – UNIT OPERATION

Remote BAS/EMS Temperature Reset

Explains how to use voltage or current signals for remote temperature reset of the chilled liquid setpoint.

SECTION 9 – SERVICE AND TROUBLESHOOTING

History Buffer and Lockout Fault Management

Explains how to clear history buffers and manually reset system lockout faults.

Service Mode Operations

Guides on entering Service Mode to view/modify unit outputs, configuration, and inputs.

Troubleshooting Guide

Provides causes and solutions for common problems like no display, flow switch issues, and pressure faults.

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