York YCAS1065EB Series User Manual

INSTALLATION, OPERATION & MAIN TE NANCE
AIR-COOLED SCREW LIQUID CHILLERS
New Release
Form 201.19-NM8 (804)
YCAS AIR-COOLED LIQUID CHILLERS
YCAS0685EB THROUGH YCAS0965EB (3 COMPRESSOR)
YCAS1065EB THROUGH YCAS1215EB (4 COMPRESSOR)
STYLE G R407C
50 Hz
I/O BOARD #2 EPROM
031-01798-001
MICROPROCESSOR BOARD
031-01788-002
(YCAS 3 SYSTEM EPROMs)
(YCAS 4 SYSTEM EPROMs)
I/O BOARD #2 EPROM
031-01798-001
MICROPROCESSOR BOARD
031-01788-002
035-20886-000
00258VIP

York YCAS1065EB Series Specifications

General

Brand	York
Model	YCAS1065EB Series
Category	Chiller
Language	English

Summary

SECTION 1 - GENERAL CHILLER INFORMATION & SAFETY

SAFETY

Details on safety standards and compliance for YCAS chillers with applicable industry codes.

EMERGENCY SHUTDOWN

SECTION 2 - PRODUCT DESCRIPTION

Compressor

Description of the semi-hermetic rotary twin-screw compressor design, features, and lubrication system.

Evaporator

Details on the high-efficiency Shell and Tube type Direct Expansion Evaporator's construction and operation.

Microprocessor Controls

Motor Current Protection

MOTOR STARTING

PRODUCT IDENTIFICATION NUMBER (PIN)

SECTION 3 - HANDLING AND STORAGE

SECTION 4 - INSTALLATION

PIPEWORK CONNECTION

Recommendations for satisfactory pipework connections to ensure unit operation and maintain warranty.

ELECTRICAL CONNECTION

CUSTOMER CONNECTIONS

SECTION 5 - COMMISSIONING

Refrigerant Charge

Procedure for checking and ensuring the correct refrigerant charge and leak testing.

FIRST TIME START-UP

Suction Superheat

Procedure for checking suction superheat at steady full compressor load.

SECTION 6 - OPERATION

NORMAL RUNNING AND CYCLING

Description of automatic operation, compressor loading, and condenser fan control.

SECTION 7 - TECHNICAL DATA

PHYSICAL DATA - YCAS R-407C (SI UNITS)

Table detailing physical characteristics, capacity, weight, and dimensions for YCAS R-407C models.

ELECTRICAL DATA

MULTIPLE POINT POWER SUPPLY CONNECTION

Details on field-provided power supply connections for standard units.

ELEMENTARY WIRING DIAGRAM YCAS0685 - YCAS0965 (3 COMPRESSOR)

DXST DIRECT DRIVE 3 COMPRESSOR

DIMENSIONS – YCAS0685 (SI)

WEIGHT DISTRIBUTION AND ISOLATOR MOUNTING POSITIONS

REFRIGERANT FLOW DIAGRAM

COMPRESSOR COMPONENTS

SYSTEM STARTUP CHECKLIST

UNIT CHECKS (NO POWER)

CHECKING SUBCOOLING AND SUPERHEAT

SECTION 8 - MICRO PANEL CONTENTS

CHILLER CONTROL PANEL PROGRAMMING AND DATA ACCESS KEYS

1.4 MICROPROCESSOR BOARD

1.10 EMS/BAS CONTROLS

1.19 ALARMS

2. STATUS KEY: GENERAL STATUS MESSAGES & FAULT WARNINGS

2.2 GENERAL STATUS MESSAGES

2.5 UNIT FAULT STATUS MESSAGES

High Discharge Pressure Cutout

3. DISPLAY KEYS & OPTION SWITCHES

3.2 CHILLED LIQUID TEMPS KEY

3.7 OPTIONS KEY & DIP SWITCH SETTINGS

4. PRINT KEYS

4.3 OPERATING DATA – LOCAL DISPLAY MESSAGES

4.5 HISTORY KEY

5. ENTRY KEYS

6. SETPOINTS KEYS & CHILLED LIQUID CONTROL

6.2 CHILLED LIQUID TEMPERATURE CONTROL

Slide Valve Control

8. PROGRAM KEY

8.2 PROGRAM KEY – USER PROGRAMMABLE VALUES

Low Leaving Liquid Temperature CutOut

8.4 ELECTRONIC EXPANSION VALVE

LOW SUPERHEAT CUTOUT SAFETY

8.6 EEV PROGRAMMING

8.7 EEV TROUBLESHOOTING

8.8 3 COMPRESSOR CONDENSER FAN CONTROL

8.10 SERVICE MODE: UNIT SETUP

8.11 CONTROL INPUTS/OUTPUTS

8.12 SENSOR CALIBRATION CHARTS

SECTION 9 - MAINTENANCE

GENERAL REQUIREMENTS

Daily/Weekly Maintenance

MAINTENANCE REQUIREMENTS FOR YORK YCAS SCREW CHILLERS

SECTION 10 - SPARE PARTS

Recommended Spares

SECTION 11 - TROUBLESHOOTING GUIDE

No display on panel - unit will not start

NO RUN PERM displayed (No run permissive)

SYS # HIGH OIL TEMP

SYS # HIGH DSCH displayed (High discharge pressure trip)

LIMITED WARRANTY YORK AMERICAS ENGINEERED SYSTEMS

WARRANTY ON NEW EQUIPMENT