York RecipPak YEAJ44DR7 User Manual

INSTALL., OPER., MAINT.
RecipPak LIQUID CHILLERS
AIR COOLED – RECIPROCATING HERMETIC
Supersedes: See Back Page
Form 150.60-NM4 (1095)
60 HZ MODELS
YEAZ88DR6, YEAJ44DR6, YEAJ44HT6, YEAJ54ES6,
YEAJ55HT8, YEAJ65HT8, YEAJ66MT8
50 HZ MODELS
YEAJ44DR7, YEAJ55DR7, YEAJ55HT7, YEAJ65ES7,
YEAJ66HT9, YEAJ76HT9, YEAJ77MT9
STYLE A*
*With EPROM 031-01096-001 (Standard, Brine & Metric Models, Combined)
200, 230, 460-3-60
®
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26174A
SHOWN WITH OPTIONAL
SINGLE POINT POWER CONNECTION

York RecipPak YEAJ44DR7 Specifications

General

Model	YEAJ44DR7
Category	Chiller
Cooling Capacity	44 tons
Refrigerant Type	R-410A
Compressor Type	Reciprocating
Number of Circuits	2
Number of Compressors	4
Voltage	460V

Summary

Operational Limitations

Voltage Limitations

Specifies the absolute voltage limitations to prevent compressor damage.

Electrical Data

Single Compressor Power Supply Wiring

Provides electrical data for single compressor power supply, including fuses and wire ranges.

Electrical Data (Continued)

Dual Compressor Power Supply Wiring

Lists electrical data for dual compressor power supply, including fuses and wire ranges.

Wiring Diagrams

Dual Compressor Power Supply Wiring

Shows wiring diagrams for standard units, non-fused disconnect, and single point options.

Elementary Diagram

Presents the elementary diagram showing power supply and system wiring connections.

Installation

Installation Check List

Lists essential checks to perform before placing units into operation.

Installation (Continued)

Chilled Liquid Piping and Electrical Wiring

Electrical Wiring

Details field wiring requirements, NEC compliance, and control panel connections.

Elementary Diagram (Continued)

Control Circuit

Explains the control circuit, power supply, and component connections.

Connection Diagram (System Wiring)

Condenser Fans and Cooler Connections

Shows connection diagrams for condenser fans and cooler components.

Compressors Connections

Illustrates connection points for compressors, including transducers and valves.

System Wiring (Continued)

Compressor Terminal Box Wiring

Provides detailed wiring diagrams for compressor terminal boxes for Z and J compressors.

Connection Diagram, Electrical Box

Electronic and Power Panel Connections

Shows the connection diagram for the electrical box components and panels.

Connection Diagram (Continued)

Disconnect Panel and Single Point Enclosure Wiring

Depicts wiring for disconnect panel and single point enclosure options.

Unit Controls and Operation

York Microcomputer Control Center

Introduces the microprocessor-based control system for multi-circuit chiller control.

Control System Components

Control Panel

DIP Switch Location and Position

Switch Functions

Switch Functions (Continued)

Fault Status Messages

Chiller Faults

Lists chiller-wide fault messages related to ambient, water temp, and voltage.

System Faults

Lists system-specific fault messages for discharge, oil pressure, and suction.

"Program" Key

Programming User Programmable Safeties and Limits

Introduces programming operating limits like cut-outs and timers.

Discharge Cut-Out Programming

Details how to program the discharge cut-out setting for safety.

Programming Limits

Outside Air Temp Cut-Out Programming

Explains programming for low and high ambient temperature cut-outs.

Discharge Pressure Unload Programming

Details programming the discharge pressure unload point for system protection.

Programming Limits (Continued)

Suction Pressure Unload and Rate Control Temp

Covers programming suction pressure unload and rate control temperature.

Suction Pressure Cut-Out and Rate Sensitivity

Details programming suction pressure cut-out and rate sensitivity.

Anti Recycle Time and Leaving Water Temp Cut-Out

Explains programming anti-recycle time and leaving water temperature cut-out.

Selection of Return or Leaving Chilled Liquid Control

General Control Mode Selection

Explains how to select between Return Water Control and Leaving Water Control.

"Setpoints" Keys

Programming Setpoints

Programming Return Water Rate Control

Rate Control Temp Programming

Programming Leaving Water Control

Rate Sensitivity Programming

Chilled Liquid Temp/Range Programming (Leaving Water)

Programming Leaving Water Control (Continued)

Low-Limit Water Temperature (LWT) and Control Range (CR)

Rate Control Temp Programming (Leaving Water)

Loading and Unloading

Return Water Temperature Control Loading/Unloading

Leaving Water Temperature Control Loading/Unloading

Loading/Unloading Sequences

Leaving Water Control Loading/Unloading Sequences

"System Safeties"

Manual Reset Safeties

Explains manual reset safeties that shut down the system upon exceeding thresholds.

Motor Current Safety

Details the motor current safety feature and its operational parameters.

System Safeties (Continued)

Oil Pressure Safety and Discharge Pressure Safety

Covers oil pressure and discharge pressure safety features and their functions.

Pumpdown Safety and Motor Protector

Explains pumpdown safety and the function of the motor protector.

Automatic Reset Safeties

Low Water Temperature Safety

Describes the low water temperature safety and its cut-out programming.

High Ambient and Under Voltage Safety

Covers high ambient and under voltage safety features.

Automatic Reset Safeties (Continued)

Low Ambient Temperature Safety and Flow Switch

Details low ambient temperature safety and flow switch monitoring.

"Unit" On / Off Switch

Lead/Lag Compressor Selection

Remote Unloading and Setpoint Offset Calculation

Compressor Capacity Control

Compressor Unloading Steps

Loading/Unloading Mechanisms

System Start-Up Checklist

Checking the System 24 Hours Prior to Initial Start-Up (No Power)

Lists essential unit checks to perform before applying power.

Panel Checks (Power On-Both System Switches "Off")

Details panel checks, voltage verification, and heater status before start-up.

System Start-Up Checklist (Continued)

DIP Switch Programming and Initial Start-Up

Covers dip switch programming, limit programming, and initial unit operation.

Checking Superheat and Subcooling

Subcooling Check and Example

Explains how to check and record subcooling levels for refrigerant charge verification.

Superheat Check and Example

Details how to check and record superheat for compressor protection.

Operating Sequence

Start-Up Conditions and Lead Compressor Checks

Lag Compressor Checks and Sequencing

Preventative Maintenance

Daily Maintenance

Low Ambient Option Programming and Fan Control

Fan Control Strategies

Hot Gas Bypass (Loadminder) Option

LWT Control Hot Gas Operation

RWT Control Hot Gas Operation and Regulator Setting

Hot Gas Bypass (Loadminder) Option (Continued)

BAS Interface Option (Remote Reset Option)

Troubleshooting Chart

"No Display" and "No Run Perm" Faults

Covers troubleshooting steps for units with no display or "No Run Perm" status.

"Motor Current" and "Low Oil Press" Faults

Provides solutions for motor current and low oil pressure faults.

Troubleshooting Chart (Continued)

"Low Suction" and "High Dsch" Faults

Offers solutions for low suction and high discharge pressure faults.

"Chiller Fault: Low Water Temp"

Details troubleshooting for low water temperature shutdown and sensor checks.

Compressor Won't Load

Provides solutions for problems where the compressor won't load.

"Chiller Fault: High Ambient Temp" and "Chiller Fault: Low Ambient Temp"

Provides steps for diagnosing high and low ambient temperature faults.

Low Compressor Oil Level and Crankcase Heater Issues

Covers low compressor oil level and crankcase heater problems.

Lack of Cooling Effect

Offers troubleshooting steps for lack of cooling effect issues.