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York YLAA0156 User Manual

York YLAA0156
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 YLAA0156 Specifications

General IconGeneral
BrandYork
ModelYLAA0156
CategoryChiller
LanguageEnglish

Summary

SECTION 1 – GENERAL CHILLER INFORMATION AND SAFETY

WARRANTY

Details the warranty period and conditions for the equipment.

SAFETY AND QUALITY

Information on compliance with safety standards and quality certifications.

MISUSE OF EQUIPMENT

Warnings regarding hazards and improper use of the equipment.

SECTION 4 – INSTALLATION

INSTALLATION CHECKLIST

Pre-operation checks required before unit installation.

WIRING

Instructions for field wiring of power and control connections.

SINGLE-POINT SUPPLY CONNECTION

Wiring diagram and safety notes for power connection.

SECTION 5 – TECHNICAL DATA

OPERATIONAL LIMITATIONS

Critical operating temperature and flow limits for the chiller.

ELECTRICAL DATA

Information on power supply, voltage, and component ratings.

WIRING DIAGRAMS

Visual representations of the unit's electrical wiring.

SECTION 6 – COMMISSIONING

PREPARATION – POWER OFF

Initial checks and procedures before powering the unit.

Refrigerant Charge

Steps for properly charging the system with refrigerant.

Compressor Oil

Procedures for checking and adding compressor oil.

PREPARATION – POWER ON

Steps to follow after applying power to the unit.

COMMISSIONING THE PUMP VFD

Procedure for configuring and setting up the Variable Frequency Drive for pumps.

INSTALLATION CHECKLIST

Comprehensive checklist for unit installation and pre-startup.

CHECKING SUPERHEAT AND SUBCOOLING

Method for verifying refrigerant charge via superheat and subcooling.

LEAK CHECKING

Procedures for performing leak checks on the refrigeration system.

SECTION 7 – UNIT CONTROLS

STATUS KEY

Explanation of various status messages displayed on the unit.

SECTION 8 – UNIT OPERATION

CAPACITY CONTROL

How the chiller manages and stages cooling capacity.

SUCTION PRESSURE LIMIT CONTROLS

Controls designed to prevent low suction pressure cutouts.

LEAVING CHILLED LIQUID CONTROL

Control strategy for maintaining leaving chilled liquid temperature.

LOAD LIMITING

Feature to limit unit loading based on demand or system constraints.

SECTION 9 – SERVICE AND TROUBLESHOOTING

SERVICE MODE

Accessing and navigating the service mode for diagnostics.

TROUBLESHOOTING

Common problems, causes, and solutions for unit operation.

SECTION 10 – MAINTENANCE

MICROCHANNEL COIL CLEANING

Procedures for cleaning the microchannel condenser coils.

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