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York YHAU-CW User Manual

York YHAU-CW
168 pages
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Model YHAU-CW
150 - 2000 TON
527 - 7,033 KW
DOUBLE EFFECT STEAM-FIRED
ABSORPTION CHILLER
INSTALLATION, OPERATION, MAINTENANCE
NEW RELEASE Form 155.31-ICOM2.EN.UL (1218)
Issue Date:
December 21, 2018
LD22831

Table of Contents

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York YHAU-CW Specifications

General IconGeneral
BrandYork
ModelYHAU-CW
CategoryChiller
LanguageEnglish

Summary

General Chiller Information and Safety

Quality Assurance

Lists directives and standards the units comply with, including grounding and safety.

Emergency Shutdown

Explains how to perform an emergency shutdown using the circuit breaker.

Safety Labels

Illustrates and explains various safety labels and their meanings.

Precautions for Use

Lists critical safety precautions regarding operation, maintenance, and electrical hazards.

Product Description

Chiller Components

Lists the main components of the absorption chiller unit.

How it Works

Explains the operating principle of the double effect steam-fired absorption chiller.

Crystallization

Discusses crystallization issues in LiBr/water chillers and prevention methods.

Handling, Storage, Installation and Reassembly

Hoisting the Machine

Outlines procedures and precautions for safely hoisting the chiller unit using eye plates.

Moving the Machine on Rollers

Provides instructions for moving the machine on rollers, emphasizing inclination limits and skid base use.

Structural Support and Installation

Covers foundation requirements, leveling tolerances, and maintenance space.

Precautions for Use

Lists critical safety precautions regarding operation, maintenance, and electrical hazards.

Technical Data

Typical Operational Range

Lists allowable ranges for key operating parameters like temperatures and pressures.

High Efficiency Weights and Dimensions

Provides weights and dimensions for high-efficiency models.

Electrical Data

Lists electrical specifications for various models, including breaker sizes and pump data.

Upper Communication Specification

Applies to CW-EX and CW-EXW series, covering communication system configuration.

Commissioning

General Guidelines for Use

Provides general instructions for pre-start up and commissioning procedures.

Precautions for the Use of Steam

Details precautions related to steam usage, water quality, and potential corrosion.

Chiller Start Up and Commissioning Checklist

A checklist for ensuring all installation and start-up tasks are completed correctly.

Operation Check

Covers manual and automatic pump starts, dilution process, and steam control valve operation.

Operation

YHAU-CW Control Center

Introduces the control center for efficiency, monitoring, and data recording.

Main Screen

Displays chiller status, operating modes, and pump status.

Data Screen

Shows temperatures, operating hours, trends, and histories of failures/alarms.

Failure History Screen

Displays failure information for the last and previous failures, including cause and countermeasure.

Maintenance

Solenoid Valves

Lists the solenoid valves used in the chiller and their functions.

Start the Chiller After It Has Been Stopped for a Long Period

Provides a procedure for starting the chiller after a long period of inactivity.

Refrigerant Refining Method

Details the procedure for refining refrigerant to prevent capacity loss due to solution mixing.

Water Quality Control

Provides guidelines for maintaining high water quality standards for chilled and cooling water.

Troubleshooting

Troubleshooting Performance Issues

Guides on identifying and fixing performance issues, contacting service for serious malfunctions.

Chilled Water Overcooling or Refrigerant Overcooled

Addresses causes and countermeasures for overcooling of chilled water or refrigerant.

Abnormal Solution and Refrigerant Levels

Details causes and countermeasures for incorrect solution and refrigerant levels.

Troubleshooting Sequence Flow Chart

Visualizes the sequence of troubleshooting steps for chiller operations and failures.

Decommissioning, Dismantling, and Disposal

Electrical Isolation and Disconnection

Steps to isolate electrical supply and disconnect cables before dismantling.

Solution and Refrigerant Handling

Procedures for filling with N2, preparing containers, and draining/disposing of solution and refrigerant.

Unit Removal and Disposal

Instructions for removing the unit, dismantling components, and proper disposal according to regulations.

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