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General| Brand | Johnson Controls |
|---|---|
| Model | YORK Tempo YLAA0135 |
| Category | Chiller |
| Language | English |
Provides essential safety information for operating and servicing the chiller unit, emphasizing personnel training and hazard awareness.
Explains hazard symbols used in the document for clear communication of potential risks like danger, warning, caution, and notes.
Outlines safety standards and quality accreditations for YLAA chillers, including compliance with industry codes and ISO 9002.
Covers improper application, structural support, mechanical strength, and general access hazards to prevent equipment damage or injury.
Emphasizes safety procedures for electrical work, including grounding, power isolation, and use of trained personnel.
Details the control center's features: display, keypad, and programming capabilities for setpoints, cutouts, and unit options.
Explains the coding system for identifying unit model, capacity, efficiency, refrigerant, voltage, and design series.
Guidance on selecting unit locations and maintaining required clearances for airflow, servicing, and minimizing sun exposure.
Lists critical operational limits for temperature and flow to prevent cooler damage and ensure rated performance.
Specifies absolute voltage limitations that must be adhered to, to prevent serious damage to the compressor.
Provides further notes on electrical system configurations, fan speed options, and special kits applicable to chiller operation.
Basic checks before powering off the unit: inspection, refrigerant charge, service valves, compressor oil, fans, isolation, panel, power, grounding, and supply voltage.
Ensures correct switch settings on the control panel and verifies display illumination and system switch status.
Verifies compressor heaters are energized for a specified duration before start-up to remove refrigerant from oil.
Verifies correct installation and wiring of the chilled water flow switch on the cooler outlet.
Checklist for pre-startup procedures, including unit inspection, piping completion, refrigerant leak checks, and valve positions.
Startup procedures covering panel checks, power verification, setpoint programming, and condenser fan cycling.
Instructions for performing leak checks on compressors, fittings, and piping to ensure system integrity before operation.
Overview of the microprocessor control center, its components, and functions for managing chiller operations.
Explains the function of the IPU II and I/O boards as the central processing and input/output units for the chiller.
Categorizes faults into system safeties and unit safeties, explaining their impact on operation and reset procedures.
Describes system-specific faults that cause shut down, including auto-reset and lockout conditions for individual systems.
Explains warning messages that do not cause automatic restarts and require operator intervention for chiller restart.
Explains how to interpret displayed status messages for running, cooling demand, fault conditions, and safeties.
Describes how to use the OPER DATA key to view system operating parameters and scroll through data screens.
Describes how to obtain a printout of current system operating parameters and programming selections using the PRINT key.
Explains how to access and scroll through historical shutdown data using the HISTORY key and arrow keys.
Explain the use of arrow keys for scrolling through data screens and adjusting values during programming.
Details the ENTER/ADV key's role in saving changes and advancing through programming menus.
Explains how to program the cooling setpoint and range for leaving or return chilled liquid control modes.
Describes the display and programming of setpoint and range for leaving chilled liquid temperature control.
Instructions for programming the seven-day daily schedule and holiday settings for unit operation.
Describes the discharge pressure cutout function, its software backup, and restart conditions based on pressure drop.
Details the suction pressure cutout's role in preventing evaporator freeze-up and its typical setting for water cooling.
Explains the low ambient temperature cutout for protecting the chiller in cold conditions and its restart criteria.
Describes the leaving chilled liquid temperature cutout for preventing evaporator freeze-up and its restart conditions.
Explains the programmable anti-recycle timer's function to prevent short cycling and ensure compressor motor longevity.
Details the process of initiating the chiller start sequence and evaluating cooling needs based on temperatures and permissive inputs.
Explains how the chiller regulates leaving chilled liquid temperature using setpoints, range, and compressor staging.
Explains lead/lag options for balancing system run hours and compressor sequencing for optimal operation and preventing short cycling.
Sample table illustrating compressor staging for return water control based on cooling setpoint and range.
Table detailing return chilled liquid control logic for 4 compressors across 6 steps, including on/off points.
Table showing lead and lag system compressor sequencing for return chilled liquid control.
Explains how to enter and use Service Mode for enabling/disabling outputs, changing configuration, and viewing inputs.
Describes viewing and modifying chiller outputs, operating hours, refrigerant type, expansion valve type, and counters in Service Mode.
Covers configuration settings like data logging, soft start, refrigerant type, and expansion valve type that must match the actual chiller.
Explains how to view digital and analog inputs, including pressure and temperature sensors, and their corresponding voltage readings.
Troubleshooting steps for no display or unit operation issues, covering power, transformer, and board checks.
Addresses causes of low suction pressure faults, including cutout adjustments, refrigerant charge, and TXV issues.
Troubleshooting steps for high discharge pressure faults, covering fan operation, refrigerant levels, and transducer issues.
Troubleshooting steps for Motor Protector/High Pressure Cutout faults, covering refrigerant charge, rotation, and switch issues.
Addresses causes for compressors not starting, such as insufficient demand, water temperature sensors, or contactor failures.
Troubleshooting steps for cooling effect issues, including evaporator fouling, improper flow, and low refrigerant charge.
Maintenance procedures for compressors, including oil level checks and oil analysis recommendations.
