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Describes the YORK Millennium Air-Cooled Scroll Condensing Units and their general specifications.
Details the suction-gas cooled, hermetic scroll compressors used in the unit.
Describes the condenser coils, fans, and motors.
Explains the two independent refrigerant circuits and piping.
Outlines the warranty terms and conditions for the equipment.
Lists standards and codes the units comply with and safety responsibilities.
Explains the use of hazard symbols (Warning, Caution, Note) and manual disclaimers.
Details improper uses that can lead to injury or damage, including structural, electrical, and rotating parts hazards.
Provides an overview of the YORK Millennium Air-Cooled Scroll Condensing Units.
Summarizes the main components and their functions within the unit.
Details the suction-gas cooled, hermetic scroll compressors used in the unit.
Describes the condenser coils, fans, and motors.
Explains the two independent refrigerant circuits and piping.
Details the control center, display, keypad, and programming capabilities.
Describes the kit required for operation in high ambient temperatures.
Details communication capabilities like BACnet and Modbus.
Describes the components within the power panel.
Lists various power options like disconnect switches and control transformers.
Details control options like Ambient Kit, BAS interface, and language display.
Lists options for relief valves, hot gas bypass, and service isolation valves.
Covers condenser coil protection and enclosure panel options.
Describes different types of enclosure panels available for the unit.
Details options for reducing unit noise, including sound blankets and quiet fans.
Illustrates the main components of the unit with labels.
Shows a detailed view of the power panel components.
Details components within both the power and control panels.
Explains the unit's Product Identification Number (PIN) and its coding.
Continues the explanation of the PIN structure for various features and options.
Continues the explanation of the PIN structure for various features and options.
Continues the explanation of the PIN structure for various features and options.
Illustrates the flow of refrigerant through the unit's components.
Depicts the unit's process flow and instrumentation with control functions.
Provides guidelines for unit delivery, storage, and essential precautions.
Details procedures for inspecting the unit for transit damage.
Explains safe rigging practices and lifting instructions for the unit.
Provides instructions on safely moving the condensing unit.
Refers to data shipped with the unit for weight and distribution details.
Lists essential checks to be performed before unit operation.
Provides guidance on handling the unit during installation.
Details site selection criteria and required clearances for proper installation.
Specifies requirements for the unit's mounting foundation.
Provides guidance for installing the unit at ground level.
Offers considerations for rooftop installation of the unit.
Advises on unit placement to minimize noise impact in sensitive areas.
Addresses considerations for installations in areas with snow accumulation.
Refers to dimensions for recommended unit clearances.
Discusses protection options for units in corrosive environments.
Instructions for identifying and locating spring isolators.
Describes how compressors are mounted on isolators.
Suggests pipework arrangements for unit installations.
Provides recommendations for ductwork connections to the fan discharge.
Covers field wiring requirements and connections.
Details field wiring requirements for power and control circuits.
Specifies installation and wiring for liquid line solenoid valves.
Describes factory supply and field installation of the discharge air sensor.
Details wiring for zone thermostats in suction pressure control mode.
Explains the function and operation of standard compressor heaters.
Specifies the location and pressure settings for relief valves.
Details the high pressure cutout switch settings.
Explains the function and wiring of air proving switches for safety and control.
Describes how to wire remote start/stop contacts for unit control.
Details how to implement a remote emergency shutdown.
Explains the use of contacts for evaporator blower start signals.
Describes contacts used for monitoring compressor run status.
Details normally-open contacts for monitoring alarm status.
Explains how to remotely reset the discharge air temperature setpoint.
Describes the load limiting feature and its field connections.
Explains the function and operation of standard compressor heaters.
Provides general guidelines and responsibilities for refrigerant piping design.
Discusses R-410A copper line sizing requirements and standards.
Provides specific notes on line sizing for YCRL chillers.
Details considerations for practical line sizes to ensure proper refrigerant flow and oil return.
Addresses suction line sizing when the evaporator is below the condensing unit.
Discusses liquid line design considerations when the condenser is below the evaporator.
Explains the importance and placement of oil traps in suction lines.
Details the process for weighing in the correct refrigerant charge.
Notes that these components are field supplied for each refrigerant circuit.
Lists refrigerant line connection sizes for various models and systems.
Details considerations for practical line sizes to ensure proper refrigerant flow and oil return.
Addresses suction line sizing when the evaporator is below the condensing unit.
Discusses liquid line design considerations when the condenser is below the evaporator.
Explains the importance and placement of oil traps in suction lines.
Details the process for weighing in the correct refrigerant charge.
Notes that these components are field supplied for each refrigerant circuit.
Provides pressure drop data for refrigerant lines based on size and conditions.
Illustrates the single-point power supply connection methods.
Shows the field wiring diagram for the discharge air sensor.
Details the wiring connections for various control functions.
Provides a diagram illustrating control wiring connections.
Defines temperature and flow limitations crucial for compressor protection.
Lists absolute voltage limitations to prevent compressor damage.
Provides physical dimensions and data for YLUA models.
Details micro panel power supply and voltage range specifications.
Specifies power supply requirements and protection for the micro panel.
Outlines the acceptable operating voltage ranges for the unit.
Provides unit electrical data for standard efficiency models with 4 compressors.
Details electrical data, including FLA, MCA, and fuse/breaker sizes for 4-compressor units.
Details electrical data for standard efficiency models with 5 compressors.
Presents electrical data for single-point connections.
Continues electrical data for single-point connections, including 6-compressor units.
Details electrical data for standard efficiency models with 6 compressors.
Details electrical data for high efficiency models with 4 compressors.
Details electrical data for high efficiency models with 5 compressors.
Continues electrical data for single-point connections.
Presents electrical data for dual-point connections for 4-compressor units.
Details electrical data for dual-point, 4-compressor standard efficiency units.
Details electrical data for dual-point, 5-compressor standard efficiency units.
Continues electrical data for dual-point connections.
Continues electrical data for dual-point connections, including 6-compressor units.
Details electrical data for dual-point, 6-compressor standard efficiency units.
Details electrical data for dual-point, 4-compressor high efficiency units.
Details electrical data for dual-point, 5-compressor high efficiency units.
Continues electrical data for dual-point connections.
Provides lug sizing information for various electrical connections.
Explains notes related to circuit ampacity, disconnect switches, and wiring.
Defines designations and symbols used in electrical diagrams and notes.
Continues the legend and provides general notes on field wiring and connections.
Introduces elementary wiring diagrams.
Shows the elementary wiring diagram for the unit.
Illustrates connection diagrams for various power options.
Shows diagrams for connecting power options to the unit.
Depicts wiring diagrams for single and dual point electrical configurations.
Provides wiring diagrams for the unit.
Shows a wiring diagram illustrating electrical connections.
Details the physical connections to the micro panel.
Illustrates the connection points on the micro panel.
Shows an elementary diagram of the unit's electrical system.
Provides physical dimensions for YLUA0078 to YLUA0095 models.
Provides physical dimensions for YLUA0098 to YLUA0130 models.
Provides physical dimensions for YLUA0148 to YLUA0158 models.
Illustrates required clearances around the unit for operation and maintenance.
Explains weight distribution and provides sample isolator location data.
Provides cross-reference for spring isolators and their rated capacities.
Gives step-by-step instructions for installing one-inch deflection spring isolators.
Provides cross-reference for seismic isolators and their weight ranges.
Details installation and adjustment procedures for seismic isolators.
Provides cross-reference for Durulene isolators and their dimensions/weight ranges.
Gives installation instructions for Durulene vibration isolators.
States that commissioning must be done by authorized personnel.
Lists basic checks to perform with power to the unit switched OFF.
Details the procedure for checking and adding compressor oil.
Instructs to check fans for free rotation and damage.
Verifies that all electrical supply is from a single point of isolation.
Checks the control panel for cleanliness and foreign materials.
Verifies correct and tight power cable connections.
Ensures protective ground terminals are properly connected and tight.
Verifies site supply voltage matches unit requirements.
Details checks to perform after applying power to the unit.
Guides on setting unit and system switches for operation.
Verifies compressor heaters are energized for a specified duration before startup.
Confirms correct fitting and wiring of the air flow switch.
General checks on the unit before initial startup.
Checks voltage and application time for compressor heaters.
Verifies 3-phase power and 120VAC control power at panel terminals.
Instructs to program and verify setpoints, program values, and unit options.
Details how to calculate and adjust subcooling and superheat for optimal performance.
Instructs to perform leak checks on compressors, fittings, and piping.
Introduces the YORK MicroComputer Control Center and its functions.
Describes the microprocessor board's role as the unit's controller.
Explains the function of the unit's ON/OFF switch.
Describes the 40-character LCD display for system parameters and messages.
Details the 12-button keypad for accessing parameters and programming.
Explains the purpose of the battery backup for the real-time clock.
Describes the transformer that supplies power to the control board.
Explains how to configure single/dual systems and program compressor count.
Explains how to use the STATUS key to check current unit operating status.
Lists and explains general status messages displayed by the unit.
Explains system safeties that cause individual system shutdowns.
Describes the manual override mode for emergency or service use.
Explains safety status messages indicating exceeded thresholds.
Explains system safeties that cause individual system shutdowns.
Details the discharge pressure cutout safety function.
Explains the suction pressure cutout safety function.
Describes motor protector and high pressure cutout faults.
Explains unit safeties that shut down all running compressors.
Describes the low ambient temperature cutout safety.
Explains the under voltage safety shutdown for the micro panel.
Lists unit warnings that require operator intervention.
Provides a quick reference list of status key messages.
Visual guide to status key messages for troubleshooting.
Explains the use of Display/Print keys for accessing information.
Details how to access and scroll through operating data screens.
Shows display of system suction and discharge pressures.
Shows accumulated running hours for compressors.
Displays unit load and unload timer values.
Indicates the current lead system for two-system units.
Shows the active remote control mode (None, ISN, etc.).
Displays compressor status for each system.
Shows the system run time for the current cycle.
Provides a quick reference for information available via the OPER DATA key.
Illustrates a sample operating data printout.
Explains how to obtain printouts of real-time or history data.
Describes obtaining a printout of current system operating parameters.
Explains how to obtain printouts of safety shutdown information.
Describes accessing and displaying history buffer information.
Shows the programmed suction pressure cutout and range.
Shows the programmed low ambient temperature cutout.
Shows discharge air temperature if control is selected.
Shows the current discharge air temperature setpoint and how to adjust it.
Shows system suction and discharge pressure at the time of fault.
Explains how to view the unit's software version.
Describes the Entry keys for navigating and changing programmed values.
Explains how to scroll through and change unit options.
Details how to program the display language for the unit.
Explains the function of system switches for controlling unit operation.
Introduces keys for programming cooling setpoints, schedule, and safeties.
Explains how to program cooling setpoints and range for DAT or Suction Pressure control.
Indicates cooling setpoint is under local control based on discharge air temperature.
Indicates cooling setpoint is under local control based on suction pressure.
Indicates cooling setpoint is under remote control based on discharge air temperature.
Indicates cooling setpoint is under remote control based on suction pressure.
Shows the current discharge air temperature setpoint and how to adjust it.
Shows the current suction pressure setpoint and range for control.
Explains how to program the seven-day schedule and holiday settings.
Details how to access and change programmable operating parameters.
Shows the programmed discharge pressure cutout setting.
Shows the programmed suction pressure cutout setting.
Shows the programmed low ambient temperature cutout setting.
Details the programmed anti-recycle timer setting.
Shows the programmed fan control on pressure setting.
Shows the total number of compressors programmed for the unit.
Shows the programmed number of fans per system.
Shows programmed trip voltage for system high current.
Explains calculation and programming for 460 VAC system trip volts.
Explains calculation and programming for 460 VAC unit trip volts.
Shows programmed remote unit ID for communication.
Lists programmable limits and defaults for cooling setpoints.
Lists programmable values and their default settings.
Provides a quick reference list for setpoints accessible via the Setpoints keys.
Explains how to scroll through and change unit options.
Details how to program the display language for the unit.
Explains the function of system switches for controlling unit operation.
Describes standard and low ambient control types and their cutouts.
Explains local and remote control modes for unit monitoring and operation.
Details unit control based on suction pressure or discharge air temperature.
Explains how to select display units in Imperial or SI.
Describes manual and automatic lead/lag control for two-system units.
Explains condenser fan control based on discharge pressure or ambient/discharge pressure.
Explains manual override mode for bypassing daily schedule.
Details options for current feedback monitoring (None, One Per Unit, One Per System).
Explains automatic or manual restart after power failure.
Notes that Soft Start must be disabled on all units.
States that Unit Type must be set to "Condensing Unit".
Emphasizes that R-410A MUST be programmed due to compressor damage risk.
Explains selection of expansion valve type (thermostatic or electronic).
Details the process for updating unit software using a Flash Card.
Describes input options for remote temperature reset functionality.
Explains programming the hot gas bypass type based on installed options.
States that data logging should be disabled.
Explains how to view and set the unit's date, time, and date.
Provides a quick reference list for unit key setpoints and programming.
Explains the sequence for unit start-up and capacity control functions.
Describes controls to prevent low-pressure cutouts by limiting loading.
Explains controls that unload the system to prevent high discharge pressure.
Details how the unit controls discharge air temperature via compressor staging.
Illustrates compressor staging based on discharge air temperature control.
Shows fan sequencing for discharge air temp control with 5/6 compressors.
Shows fan sequencing for discharge air temp control with 4 compressors.
Explains how the unit controls suction pressure via compressor staging.
Illustrates loading and unloading in suction pressure control mode.
Describes lead/lag control between systems for equalizing run hours.
Explains compressor sequencing for starting, unloading, and equalizing load.
Details the programmable timer to prevent short cycling of compressors.
Explains the timer that prevents simultaneous compressor starts.
Describes conditions under which evaporator blower start contacts energize.
Explains the pump-down feature upon unit shut-off.
Details condenser fan control based on ambient temperature and discharge pressure.
Provides fan sequencing data based on ambient and discharge pressure.
Provides fan sequencing data using discharge pressure only.
Shows the typical fan locations for YLUA0078-0095 models.
Details condenser fan control for low ambient conditions using discharge pressure.
Provides fan sequencing for low ambient conditions based on discharge pressure.
Details condenser fan control based on discharge pressure for YLUA0098-0130.
Provides fan sequencing data for YLUA0098-0130 models based on discharge pressure.
Shows fan locations for YLUA0098-0130 models.
Details condenser fan control based on discharge pressure for YLUA0148-0158.
Provides fan sequencing data for YLUA0148-0158 models based on discharge pressure.
Shows fan locations for YLUA0148-0158 models.
Explains the load limiting feature to prevent exceeding desired unit loading.
Shows load limiting stages based on the number of compressors.
Indicates how compressor run status is displayed via contacts.
Describes how system or unit shutdowns are indicated by alarm contacts.
Explains how to use voltage or current signals for BAS/EMS discharge air temperature reset.
Explains how to clear history buffers, with a caution to contact service.
Describes how to enter Service Mode to enable/disable outputs and view parameters.
Details how to view and modify outputs (except compressors) in Service Mode.
Explains how to view and program unit configuration settings.
Describes how to view analog and digital inputs in Service Mode.
Explains digital inputs and their connection points on the I/O board.
Details analog temperature inputs and their connection points.
Describes connections and voltage readings for the outside air sensor.
Lists digital inputs and their corresponding terminal connections.
Lists digital outputs and their corresponding terminal connections.
Lists analog inputs and their corresponding terminal connections.
Shows a labeled diagram of the microboard layout.
Explains how to check digital and analog inputs and outputs.
Explains digital inputs and their connection points on the I/O board.
Details analog temperature inputs and their connection points.
Describes connections and voltage readings for the outside air sensor.
Provides voltage correlation for outdoor air temperature sensor readings.
Details connections and voltage readings for the discharge air temperature sensor.
Explains analog pressure inputs and their connections.
Provides voltage correlation for discharge air temperature sensor readings.
Lists pressure transducer voltage readings for various pressure levels.
Details I/O board connections for the system 1 discharge transducer.
Details I/O board connections for the system 2 discharge transducer.
Details I/O board connections for the system 1 suction transducer.
Details I/O board connections for the system 2 suction transducer.
Explains digital outputs and their control via microprocessor switching.
Illustrates the relay contact architecture on the I/O board.
Details the installation of an optional printer for unit condition printouts.
Describes the assembly and wiring for printer connection.
Explains how to obtain printouts using the PRINT key.
Shows the electrical connections for the printer to the microboard.
Provides a table listing problems, causes, and solutions for common issues.
Continues the troubleshooting table with common problems and solutions.
Warns that improper maintenance during warranty may void coverage.
Details maintenance procedures for compressors, including oil checks.
Explains how to check the oil level in the compressor sight glass.
Describes when and how to perform oil analysis for contaminants.
States that condenser fan motors are permanently lubricated and need no maintenance.
Advises on cleaning condenser coils and exercising care for fins.
Recommends regular checks of operating temperatures and pressures.
Details the U5 Real Time Clock chip and its battery backup.
Recommends periodic inspections for proper unit operation and issues.
Explains ISN control data reception and transmission.
Lists ISN received data values used as control parameters.
Describes unit data transmission based on History Buffer Request.
Lists ISN received data points and their descriptions.
Lists ISN transmitted data points and their descriptions.
Continues the list of ISN transmitted data points and their descriptions.
Lists ISN operational and fault codes with their corresponding descriptions.
Explains reading and modifying BACnet/Modbus parameters.
Details min/max/default values for communication parameters.
Provides a list of real-time error numbers and their meanings.
Explains analog value data read/modified via BACnet or Modbus.
Lists analog value data and their BACnet/analog descriptions.
Explains binary value data read/modified via BACnet or Modbus.
Lists binary value data and their BACnet names/descriptions.
Explains analog input data that can be read but not modified.
Lists analog input data and their BACnet names/descriptions.
Continues the list of analog input data and their BACnet names/descriptions.
Explains binary input data read via BACnet or Modbus.
Lists binary input data and their BACnet names/descriptions.
Provides charts for converting between Fahrenheit and Celsius temperatures.
Lists actual temperature conversions between Fahrenheit and Celsius.
Lists differential temperature conversions between Fahrenheit and Celsius.
Provides charts for converting pressure between PSI and BAR.
Lists pressure-temperature data for R-410A refrigerant.
General
