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York CodePak YK L1 L1 G4 - User Manual

York CodePak YK L1 L1 G4
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OPERATING & MAINTENANCE
CENTRIFUGAL LIQUID CHILLERS
Supersedes: 160.49-O1 (894) Form 160.49-O1 (197)
25789A
MODEL YK L1 L1 G4MODEL YK L1 L1 G4
MODEL YK L1 L1 G4MODEL YK L1 L1 G4
MODEL YK L1 L1 G4
THRUTHRU
THRUTHRU
THRU
YK S2 S2 J4 (STYLES A & B)YK S2 S2 J4 (STYLES A & B)
YK S2 S2 J4 (STYLES A & B)YK S2 S2 J4 (STYLES A & B)
YK S2 S2 J4 (STYLES A & B)
R-22 AND R-134a (COOLING ONLR-22 AND R-134a (COOLING ONL
R-22 AND R-134a (COOLING ONLR-22 AND R-134a (COOLING ONL
R-22 AND R-134a (COOLING ONL
Y)Y)
Y)Y)
Y)
ANDAND
ANDAND
AND
MODEL YK LB LB G4MODEL YK LB LB G4
MODEL YK LB LB G4MODEL YK LB LB G4
MODEL YK LB LB G4
THRUTHRU
THRUTHRU
THRU
YK SE SC J2 (STYLE C)YK SE SC J2 (STYLE C)
YK SE SC J2 (STYLE C)YK SE SC J2 (STYLE C)
YK SE SC J2 (STYLE C)
R-134a (COOLING ONLR-134a (COOLING ONL
R-134a (COOLING ONLR-134a (COOLING ONL
R-134a (COOLING ONL
Y)Y)
Y)Y)
Y)
WITH MICROCOMPUTER CONTROL CENTER PWITH MICROCOMPUTER CONTROL CENTER P
WITH MICROCOMPUTER CONTROL CENTER PWITH MICROCOMPUTER CONTROL CENTER P
WITH MICROCOMPUTER CONTROL CENTER P
ARAR
ARAR
AR
T #371-01200-004T #371-01200-004
T #371-01200-004T #371-01200-004
T #371-01200-004
FOR ELECTRO-MECHANICAL STFOR ELECTRO-MECHANICAL ST
FOR ELECTRO-MECHANICAL STFOR ELECTRO-MECHANICAL ST
FOR ELECTRO-MECHANICAL ST
ARAR
ARAR
AR
TER & SOLID STTER & SOLID ST
TER & SOLID STTER & SOLID ST
TER & SOLID ST
AA
AA
A
TE STTE ST
TE STTE ST
TE ST
ARAR
ARAR
AR
TERTER
TERTER
TER
WARNINGWARNING
WARNINGWARNING
WARNING
SYSTEM CONTAINS REFRIGERANT UNDER PRESSURE.
SERIOUS INJURY COULD RESULT IF PROPER PROCEDURES ARE
NOT FOLLOWED WHEN SERVICING SYSTEM. ALL SERVICE WORK
SHALL BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN IN
ACCORDANCE WITH YORK INSTALLATION/OPERATION MANUAL.
27073A
27385A
STYLE C
STYLES A & B

Table of Contents

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York CodePak YK L1 L1 G4 Specifications

General IconGeneral
BrandYork
ModelCodePak YK L1 L1 G4
CategoryChiller
LanguageEnglish

Summary

Nomenclature

Styles A & B

Defines model nomenclature for chiller styles A and B.

Style C

Defines model nomenclature for chiller style C.

SECTION 1 DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION

SYSTEM OPERATION DESCRIPTION

Explains system operation and basic principles of the chiller.

CAPACITY CONTROL

Explains how pre-rotation vanes modulate chiller capacity.

SECTION 2 MICROCOMPUTER CONTROL CENTER

FIG. 3 - MICROCOMPUTER CONTROL CENTER AND KEYPAD

Details the control center interface, keypad, and display functions.

INTRODUCTION

CONTROL CENTER

Display and Interface Functions

Details characteristic display, basic display, entry, and setpoint keys.

Service and Operation Modes

Covers service keys, compressor switch, and operating modes.

Displaying System Parameters

Covers methods for displaying various system operating parameters.

SYSTEM SETPOINTS

Key Setpoint Parameters

Details setpoints for temp, current, schedule, clock, and other system controls.

PROGRAMMING THE MICROCOMPUTER CONTROL CENTER

PROGRAMMING SYSTEM SETPOINTS

Guides on entering and setting system parameters via the control center.

SECTION 5 OPERATIONAL MAINTENANCE

Control Center & Starter Details

Info on Microcomputer Control Center and Solid State Starter.

Oil Return System

Details oil return system maintenance, including dehydrator replacement.

SERVICE KEYS

Details service keys for diagnostics and resets.

OPERATING MODES

SERVICE

Mode enabling service-specific functions.

LOCAL

Normal operating mode for local control.

PROGRAM

Mode for programming setpoints and changing modes.

REMOTE

Mode for receiving control signals from external devices.

COMPRESSOR SWITCH

DISPLAY MESSAGES

System Running Status Messages

Lists and explains common messages related to system operation status.

Ready to Start & Low Pressure Messages

Messages indicating system readiness and low pressure limits.

SECTION 3 SYSTEM OPERATING PROCEDURES

OIL HEATERS

Information on the function and importance of oil heaters.

CHECKING THE OIL LEVEL IN THE OIL RESERVOIR

Procedure for checking and maintaining oil level.

START-UP PROCEDURE

Step-by-step guide for starting the chiller unit.

PRE-STARTING

Pre-start checks and preparations before initiating the start-up sequence.

CODEPAK OPERATION

CHECKING OPERATION

OPERATING LOG SHEET

Provides a template for recording system operating data.

OPERATING INSPECTIONS - See Section 2

Daily Inspections

Covers daily checks of controls, oil, pressures, temperatures, and status.

Weekly Inspections

Weekly maintenance checks.

Quarterly Inspections

Quarterly maintenance tasks.

Semi-Annual & Annual Maintenance

Semi-annual and annual maintenance procedures.

NEED FOR MAINTENANCE OR SERVICE

NORMAL AND SAFETY SYSTEM SHUTDOWNS

Safety Shutdowns

Lists and explains system shutdowns triggered by safety controls.

Cycling Shutdowns

Lists and explains shutdowns that cause automatic restarts.

STOPPING THE SYSTEM (See Fig. 3, page 5)

PROLONGED SHUTDOWN

START-UP AFTER PROLONGED SHUTDOWN

SECTION 4 SYSTEM COMPONENTS DESCRIPTION

FIG. 17 - SYSTEM COMPONENTS

Diagram illustrating and labeling major chiller components.

GENERAL

COMPRESSOR

CAPACITY CONTROL

Explains how pre-rotation vanes modulate chiller capacity.

COMPRESSOR LUBRICATION SYSTEM (See Fig. 18)

Details the oil system for compressor lubrication.

OIL PUMP

Describes the function and operation of the oil pump.

MOTOR DRIVELINE

HEAT EXCHANGERS

REFRIGERANT FLOW CONTROL

FIG. 18 - SCHEMATIC DRAWING - (YK) COMPRESSOR LUBRICATION SYSTEM

THE OIL CHARGE

OIL CHARGING PROCEDURE

Step-by-step instructions for charging oil into the reservoir.

FIG. 20 - CHARGING OIL RESERVOIR WITH OIL

Illustration of the oil charging process.

SECTION 6 TROUBLESHOOTING

SECTION 7 MAINTENANCE

VACUUM TESTING

VACUUM DEHYDRATION

Method for evacuating and dehydrating the refrigerant system.

CHECKING THE REFRIGERANT CHARGE DURING UNIT SHUTDOWN

HANDLING REFRIGERANT FOR DISMANTLING AND REPAIRS

MEGGING THE MOTOR

CONDENSERS AND COOLERS

TUBE FOULING

Explains types of deposits that foul condenser and cooler tubes.

TUBE CLEANING PROCEDURES

Methods for cleaning condenser and cooler tubes.

COMMERCIAL ACID CLEANING

Information on professional services for acid cleaning.

TESTING FOR COOLER AND CONDENSER TUBE LEAKS

COMPRESSOR

ELECTRICAL CONTROLS

SECTION 8 PREVENTIVE MAINTENANCE

COMPRESSOR

Instructions for compressor oil filter changes and oil replacement.

COMPRESSOR MOTOR

Checks for motor mounting tightness and winding deterioration.

PRESSURE TESTING

Annual procedure for testing unit for leaks.

COOLER AND CONDENSER

Maintenance related to cooler and condenser water sides.

OIL RETURN SYSTEM

Maintenance of the oil return system.

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