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FORM NO.:6U6K-B01E-NB-EN
AIR-COOLED CHILLER
AND HEAT PUMP
INSTALLATION,COMMISSIONING,
Supersedes: 6U6K-B01E-NA-EN
FORM NO.: 6U6K-B01E-NB-EN
OPERATION & MAINTENANCE
YMAA / YMPA 0045-0260
AIR-COOLED CHILLER AND HEAT PUMP
50Hz
44-255kW
R410A
Issue Date:
February 26, 2018
JOHNSON CONTROLS
1
Cooke Industries - Phone: +64 9 579 2185
Email: sales@cookeindustries.co.nz
Web: www.cookeindustries.co.nz
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Table of Contents
Troubleshooting
Related Manuals for York YMPA 0260
Summarization of Contents
General Information and Safety
Introduction to General Information
Overview of the YORK YMAA/YMPA chillers and heat pumps and their intended use.
Warranty Information
Details on the equipment warranty period, limitations, and conditions for claims.
Safety Guidelines and Standards
Highlights safety precautions, compliance with standards, and potential hazards.
About this Manual
Explains the purpose and content of the manual, emphasizing user responsibility.
Misuse of Equipment
Warns against improper use, structural support issues, and general access hazards.
Product Description
Introduction to Product
Describes YORK Air-Cooled Modular Chillers and Heat Pumps, their design, and construction.
General System Description
Details key components like compressors, refrigerant circuits, expansion valves, and evaporators.
Power Panel Overview
Explains the function and components of the unit's power panel.
Unit Options
Lists optional features such as touch screen controllers and sound reduction kits.
Hydro Kit Details
Describes the factory-fitted Hydro Kit for water and glycol systems.
Refrigerant Flow Diagram
Illustrates the refrigerant flow for cooling and heating modes.
Unit Components Overview
Diagrams showing the location of major components for different YMAA/YMPA models.
Handling and Storage
Lifting Weights and Rigging
Guidance on lifting weights and the importance of using professional riggers.
Delivery and Storage Procedures
Instructions for unit delivery, storage precautions, and inspection upon receipt.
Operating and Storage Conditions
Specifies temperature and environmental conditions for operation and storage.
Unit Inspection Post-Delivery
Details on inspecting the unit for damage and reporting any issues.
Moving Units with Forklift Trucks
Recommendations for moving units using forklift trucks, noting model-specific advice.
Unit Lifting Procedures
Instructions for using lifting holes, spreader bars, and avoiding incorrect lifting methods.
Installation
Installation Checklist
Essential checks before placing the unit into operation.
Location and Clearances
Guidelines for selecting installation location and required clearances.
Chilled Liquid Piping
Details on connecting chilled liquid piping, including general precautions and specific considerations.
Pipework Arrangement
Recommendations for arranging pipework for optimal efficiency and maintenance.
Wiring Requirements
Instructions for field wiring, power wiring, and communication wiring.
Power Supply Connection
Details on connecting the unit's power supply, including single and modular configurations.
Control Wiring
Information on control wiring, including Optiview LT and Wire Controller communication.
Technical Data
Operational Limitations
Defines operating limits for temperatures, flows, and pressures for cooling and heating.
Physical Data
Provides physical specifications like dimensions, weight, and component details for models.
Electrical Data and Diagrams
Contains electrical data tables, wiring diagrams, and electrical schematics.
DIP Switch Settings
Explains how to set DIP switches for microboards and wire controllers.
Unit Dimensions
Illustrations and dimensions for various YMAA/YMPA models with and without kits.
Installation Clearances
Diagrams and notes on required installation clearances for optimal performance.
Isolator Details
Provides cross-reference and technical data for spring and neoprene isolators.
Spring Isolator Installation
Step-by-step instructions for installing one-inch deflection spring isolators.
Neoprene Isolator Installation
Instructions for installing and adjusting neoprene isolators.
Commissioning
Preparation – Power Off Checks
Basic checks before powering on the unit, including inspection and refrigerant charge.
Preparation – Power On Checks
Steps for powering on the unit, checking connections, and system status.
Superheat and Subcooling Check
Procedure for checking and adjusting superheat and subcooling for optimal performance.
Leak Checking Procedure
Instructions for performing leak checks on compressors, fittings, and piping.
Unit Operating Sequence
Describes the unit's operational sequence after power application and during startup.
Control Modes Explanation
Details on selectable control modes like Δp-c, Δp-v, Manual, and PID control.
Mode Setting and Parameter Adjustment
Guidance on setting control modes and adjusting PID parameters.
Optiview LT Operation
Introduction to Optiview LT
Overview of the Optiview LT HMI for configuring and monitoring unit parameters.
Main Interface Overview
Description of the HMI interface layout and its five areas.
Privilege Management
Explains access levels and password requirements for system operation.
System Setpoints Configuration
Details on setting unit running modes and water temperature setpoints.
Fault Diagnosis and Readout
Procedure for accessing, screening, and resetting unit and system faults.
HMI Display Settings
Information on HMI displays, software upgrades, and privilege levels.
Schedule and Holiday Settings
Instructions for setting automatic startup/shutdown schedules and holidays.
Diagnosis Functions
Details on diagnostic inputs and outputs available for service personnel.
Wire Controller Operation
Interface Overview
Description of the touch screen wire controller interface and its areas.
Basic Operations
Covers starting/stopping the unit, setting operating mode, and temperature setpoints.
Advanced Operations
Instructions for date/time setting, schedule timer, and parameter adjustments.
Unit Operation
Capacity Control
Initiation of the start sequence and how the unit controls capacity.
Suction Pressure Limit Controls
Anticipatory controls to prevent low-pressure cutouts and manage loading.
Discharge Pressure Limit Controls
Controls to prevent system loading/unloading based on discharge pressure limits.
Compress Ratio Limit Controls
Limitations on compress ratio to ensure compressor operates within its envelope.
Discharge Temperature Controls
Controls to prevent compressor loading/unloading due to high discharge temperatures.
Inverter Frequency Control
Details on inverter compressor start-up, operation, and speed control.
Liquid Temperature Control
How the unit controls to desired cooling or heating liquid temperature setpoints.
Variable Leaving Water Temperature Controls
Controls that reset temperature setpoints based on ambient temperature changes.
Compressor Sequencing
Prioritization of compressors based on run hours for equalizing wear.
Defrost Controls
System for removing frost and ice from ambient coils to optimize efficiency.
Service and Troubleshooting
Service Mode Functions
Allows user to enable/disable outputs, change configurations, and view inputs.
Analog and Digital Inputs
Quick reference list of unit inputs and their definitions.
Digital/PWM Outputs and Communications
List of unit outputs, communication ports, and their definitions.
Running Status Information
How to retrieve system and unit information for monitoring and diagnosis.
Troubleshooting Common Problems
Guidance on identifying and resolving common issues like no display or flow faults.
Maintenance
Compressor Maintenance
Information on compressor oil type, checking oil color, and avoiding vacuum pumping.
Condenser Coil Cleaning
Recommendations for cleaning condenser coils to maintain efficiency.
Operating Parameters Monitoring
Importance of regular checks on operating temperatures and pressures.
Overall Unit Inspection
Periodic checks for loose hardware, component operation, and refrigerant leaks.
Pressure Relief Valves
Details on dual pressure relief valves and their locations.
Modbus Protocol Definitions
Defines Modbus communication parameters and data flow.
Pressure Transducer Diagrams
Diagrams showing the output characteristics of low and high pressure transducers.
EC Fan Speed Chart
Table indicating fan speed (RPM) for different fan steps.
R410A Pressure Temperature Chart
Data relating R410A gauge pressure, temperature, and transducer output.
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