To Next PageTo Next PageHow to avoid York Chiller evaporator damage due to glycol concentration?
To prevent evaporator damage, ensure the glycol concentration is adequate. The freeze point must be below the lowest expected ambient temperature at the chiller's location.
How to avoid York YVAA Style A Chiller evaporator damage due to winterization?
To prevent evaporator damage during winterization, ensure that the glycol concentration is sufficient to maintain a freeze point below the lowest expected ambient temperature at the chiller location.
What to do to avoid York YVAA Style A evaporator damage?
To prevent evaporator damage, power must remain on the York Chiller whenever the ambient temperature drops below 32°F with water in the evaporator.
Why should power not be applied to York YVAA Style A without water or glycol?
Do not apply power to the chiller unless the system is filled with water or glycol. If the chiller is equipped with the -20°F option, applying power to an empty chilled liquid system will cause the evaporator immersion heaters to fail.
Identifies the specific model and style of the chiller, including variable speed drive technology.
Provides overarching safety advice for operating, installing, and maintaining the chiller.
Explains the meaning of various warning symbols used throughout the document.
States that the document content is subject to change without notice and how to obtain updates.
Details the specific technical revisions made to the document.
Lists related manuals and their form numbers for further reference.
Introduces a proactive maintenance program that uses real-time data for optimal operation.
Explains the coding system used to identify chiller model variations and features.
Details critical safety warnings for working with electrical components and voltages within the unit.
Provides an overview of the YORK YVAA chillers and the manual's scope.
Outlines Johnson Controls' warranty policy for YVAA chillers, including terms and conditions.
Details compliance with international standards like EN ISO 9001 and various European Directives.
Addresses the use and handling of refrigerants covered by the Kyoto Protocol and environmental venting.
Defines the primary responsibilities of personnel working with the machinery for safety.
Explains the manual's purpose and limitations, reserving rights for Johnson Controls.
Warns against using the equipment for unintended purposes or operating outside specified parameters.
Stresses the importance of proper structural support and warns against adding external loads to the unit.
Covers safety precautions for unit access and handling of pressurized refrigerant systems.
Details electrical safety, grounding, and electromagnetic compatibility requirements for installation.
Highlights hazards associated with rotating fans and sharp edges on unit components.
Provides guidance on safe handling of refrigerants and oils, emphasizing ventilation and proper refrigerant use.
Advises against using high-pressure cleaning methods that could damage the unit.
Explains the emergency stop function and where to obtain Material Safety Data Sheets.
Illustrates and describes the meaning of various safety labels affixed to the equipment.
Introduces the YVAA chiller, highlighting its modern screw compressor and variable speed drive technology for efficiency.
Illustrates the system's inputs, outputs, control board, and VSD integration.
Explains the function of oil separators and the VSD's role in compressor control and efficiency.
Details the semi-hermetic twin-screw compressors and the hybrid falling film evaporator design.
Describes the micro-channel condenser, fan system, and refrigerant circuit components.
Covers the integrated electrical system, including power entry, control transformer, and cabinet design.
Explains the E-Link Gateway for connecting to BAS and exposing data.
Details the control center's functions for automatic operation, capacity control, and system monitoring.
Lists the data displayed on the control panel and key programmable setpoints for system configuration.
Describes how the chiller handles extreme conditions and lists auto-reset safety shutdown conditions.
Details options for reducing chiller noise and enhancing fan performance.
Covers condenser coil materials, corrosion resistance, and protective panel options.
Lists options for evaporator insulation, piping connections, and water box heaters.
Details options for high ambient operation, BAS interfaces, E-Link, and thermal storage.
Covers optional accessories like flow switches and differential pressure switches.
Explains options for flow switches, isolation valves, terminal blocks, circuit breakers, and disconnect switches.
Details available vibration isolation options, including elastomeric and spring isolators.
Guides on determining unit weight and procedures for safe delivery and storage.
Emphasizes that rigging and lifting must be performed by professionals according to a written plan.
Details how to inspect the unit upon delivery and safe methods for moving it.
Describes steps for removing the unit from its container and using lifting lugs or shackles.
Provides detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Continues the detailed dimensions for rigging holes across various YVAA models and configurations.
Outlines essential site selection criteria for optimal chiller performance and service access.
Provides guidance on selecting suitable outdoor locations, avoiding obstructions and corrosive elements.
Specifies required clearances around the unit for unrestricted airflow and preventing re-circulation.
Lists specific minimum clearances required between the unit and surrounding structures or other units.
Provides a table detailing minimum clearances needed for evaporator tube removal across different models.
Covers the installation of vibration isolators and notes the absence of shipping braces.
Details critical piping recommendations to ensure unit operation and prevent damage or performance loss.
Discusses drain/vent connections, insulation, and evaporator heater mat installation for freeze protection.
Addresses evaporator pressure drop considerations and warns against exceeding maximum flow rates.
Presents graphical data illustrating water pressure drop based on flow rate for different evaporator types.
Provides guidance on water quality, treatment, and a suggested pipework arrangement for unit installations.
Discusses the importance of minimum water volume and strategies for managing leaving water temperature.
Illustrates suggested layouts for varying flow rates and discusses thermal storage applications.
Covers considerations for variable primary flow systems and evaporator connection types.
Lists flange dimensions for GB marked units, including grooved sizes and nominal diameters.
Describes available flange types (grooved adapter, weld) and their dimensions based on vessel codes.
Details refrigerant relief valve piping requirements and general electrical connection recommendations.
Outlines electrical wiring standards, cable routing, and common point of isolation for power supply.
Explains the function of the control transformer and guidelines for control wiring, including shielding.
Details connections for pump starters, run/alarm contacts, and flow switches for system protection.
Explains how to configure remote run/stop, print functions, and setpoint offsets via various signals.
Illustrates the single point power connection to the unit, including the main components and supply.
Provides voltage ranges for chiller operation and notes on circuit breaker sizing.
Shows the dual point power connection for systems, including reactors, contactors, and heaters.
Repeats voltage ranges and notes on circuit breaker sizing for dual point wiring.
Presents a diagram showing customer connections to the control board, relay boards, and system signals.
Details the wiring and setup procedure for the thermal dispersion flow switch.
Illustrates the reserved customer wiring entry and the water box heater wiring box connections.
Provides instructions for connecting power to the water box heater and warnings about freeze protection.
Lists electrical lug data for single point wiring with standard condenser fans.
Details lug data for single point wiring with high airflow/high static condenser fans.
Continues the electrical lug data for single point wiring with standard/high airflow/high static fans.
Continues the electrical lug data for single point wiring with standard/high airflow/high static fans.
Continues the electrical lug data for single point wiring with standard/high airflow/high static fans.
Continues the electrical lug data for single point wiring with standard/high airflow/high static fans.
Provides electrical lug data for dual point wiring with standard/high airflow/high static condenser fans.
Continues the electrical lug data for dual point wiring with standard/high airflow/high static condenser fans.
Continues the electrical lug data for dual point wiring with standard/high airflow/high static condenser fans.
Provides single point wiring lug data for specific chiller models.
Continues the electrical lug data for dual point wiring with standard/high airflow/high static condenser fans.
States that data pertains to typical configurations and directs users to sales offices for custom needs.
Lists general unit data including refrigerant charge, oil charge, chassis dimensions, and coil specifications.
Details unit frame sizes, condenser/evaporator codes, compressor quantity, and condenser fan numbers.
Provides data on evaporator type, water volume, leaving temperature limits, and chilled water flow rates.
Details unit frame sizes, refrigerant charge, oil charge, and chassis dimensions.
Lists general unit data including refrigerant charge, oil charge, chassis dimensions, and round tube coil specs.
Details unit frame sizes, condenser/evaporator codes, compressor quantity, and evaporator water volume.
Provides dimensions, water volume, and flow rates for optional one-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional one-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional one-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional one-pass evaporators.
Provides dimensions, water volume, and flow rates for standard two-pass evaporators.
Continues the dimensions, water volume, and flow rates for standard two-pass evaporators.
Continues the dimensions, water volume, and flow rates for standard two-pass evaporators.
Continues the dimensions, water volume, and flow rates for standard two-pass evaporators.
Provides dimensions, water volume, and flow rates for optional three-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional three-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional three-pass evaporators.
Continues the dimensions, water volume, and flow rates for optional three-pass evaporators.
Presents dimensional drawings showing overall unit size, control entry, power entry, and VSD panel locations.
Provides X and Y dimension data for selecting and mounting isolators for various YVAA models.
Continues the X and Y dimension data for selecting and mounting isolators for various YVAA models.
Continues the X and Y dimension data for selecting and mounting isolators for various YVAA models.
Continues the X and Y dimension data for selecting and mounting isolators for various YVAA models.
Continues the X and Y dimension data for selecting and mounting isolators for various YVAA models.
Continues the X and Y dimension data for selecting and mounting isolators for various YVAA models.
Provides step-by-step instructions for installing elastomeric isolators, including leveling and securing.
Lists dimensional data (L, W, HF, AL, AD, BT, CD, DW) and weight ranges for Type A and Type B isolators.
Details the process for installing and adjusting one-inch deflection isolators, including leveling and securing.
Provides specifications for Type A and Type B spring isolators, including dimensions, color codes, and rated capacities.
Details the steps for installing and adjusting two-inch deflection isolators, including shim usage and leveling.
Lists dimensions and weight ranges for two-inch deflection restrained spring isolators, with color codes and part numbers.
Outlines essential preparation steps, inspection, and refrigerant charge checks before startup.
Details procedures for correctly charging refrigerant and servicing oil and line valves.
Covers checks for fans, electrical isolation, control panel cleanliness, power connections, and grounding.
Ensures correct water system installation and verifies the flow switch setup and operation.
Details setting the thermal dispersion flow switch and ensuring correct temperature sensor installation.
Guides on verifying programmed options, setting date/time, and programming start/stop schedules.
Covers initial startup steps, interlocks, unit switch operation, oil pressure, and loading.
Addresses checking system refrigerant charge and implementing freeze damage protection protocols.
Details using freeze protection fluid or draining the evaporator as per ambient temperature requirements.
Provides a table outlining required protection based on ambient air temperatures for various components.
Introduces the unit switch and the operator keypad for controlling chiller functions.
Explains the function of each key on the keypad for accessing displays and programming.
Details keypad navigation, data entry modes, display functions, and anti-recycle timer.
Explains the control logic for the evaporator pump and heater based on system conditions.
Covers compressor heater function, alarm signaling, chiller run status, and flow switch control.
Details the basic operating sequence, remote run/stop functionality, and flow switch adjustment.
Explains unit warnings, including the low battery condition and its implications.
Describes the 331-03478-xxx microboard, its features, and the function of its power supplies and LEDs.
Lists test points for verifying power supply voltages to the microboard processors and components.
Details the function and settings for configuration jumpers related to remote setpoints and limits.
Identifies key components and connectors on the new 331-03478-xxx microboard.
Outlines the three main ways chillers communicate with BAS: Native, E-Link, and SC-EQ.
Provides detailed steps for configuring BACnet MS/TP and N2 Metasys protocols for Port 1.
Details the configuration steps for setting up Modbus RTU communication on Port 2.
Explains how to configure the E-Link or SC-EQ interface for YorkTalk 2 communications.
Lists the required settings for BACnet MS/TP, Modbus RTU, N2, and YorkTalk2 communication protocols.
Lists real-time error numbers encountered during BAS communication setup and their descriptions.
Covers received and transmitted data for SC-EQ/E-Link cards and the LON E-Link gateway option.
Lists analog and binary write points, including BACnet names, object instances, and Modbus addresses.
Details analog read-only points, including engineering units, point list codes, and scaling information.
Lists binary read-only points, covering status, control modes, and fan/compressor states.
Provides a list of operational codes with their descriptions, covering manual overrides to system switch states.
Lists fault and inhibit codes, detailing various system and unit fault conditions.
Lists analog points for E-Link communication, including BACnet object names and Modbus addresses.
Lists binary points for E-Link communication, covering various system statuses and control modes.
Details E-Link points related to control modes, fan speed, and warning codes.
Lists E-Link points for system status, lockout, flow switch, and options like free cooling.
Provides E-Link fault/inhibit codes and system status indicators.
Explains VSD connections and the process for updating the chiller's software via an SD card.
Lists potential flash card update errors and instructions for setting up data logging.
Details warnings for invalid compressor numbers and serial numbers, requiring technical support.
Explains unit safety operation, auto-reset faults, and specific high ambient temperature faults.
Describes low ambient temperature and low leaving chilled liquid temperature faults, including their causes and reset conditions.
Covers VSD communication faults, general system safety operations, and ALL FAULT conditions.
Details both software and hardware high discharge pressure cutouts, including their setpoints and operational behavior.
Explains HPCO faults and software/smart freeze low suction pressure cutouts.
Covers low motor current cutout and high differential oil pressure cutout faults.
Details low differential oil pressure cutout and high discharge temperature cutout faults.
Explains low discharge superheat cutout and discharge pressure load limiting/unloading.
Details discharge pressure load limiting and suction pressure load limiting/unloading.
Explains the sensor failure cutout fault, which prevents operation if critical sensors fail.
Introduces the Micropanel's STATUS key for viewing operational status and general messages.
Lists various unit and system status messages, such as switch states, flow conditions, and compressor status.
Explains messages related to anti-recycle timers, discharge/suction pressure limits, and motor temperature limits.
Details messages related to pulldown motor current, ISN/remote current limiting, and VSD baseplate/ambient temperatures.
Explains messages related to sound limiting, including local, ISN, and remote settings.
Introduces the UNIT DATA key for accessing unit temperatures, pressures, and system status.
Explains how to navigate through unit data displays, showing temperatures, pressures, timers, and system status.
Lists types of remote control (None, RCC, ISN, Curr, Temp, Sound) and their operational modes.
Shows how sound limit values are displayed based on local, ISN, or remote inputs.
Explains the function of the data keys for accessing individual system temperatures, pressures, and operating data.
Details the specific displays for System 1 pressures (oil, discharge, suction, liquid) and temperatures.
Covers displays for compressor speed, flash tank level, subcooling, condenser fans, and VI solenoids.
Explains displays for system run time, run signals, and notes on System 2, 3, and 4 data availability.
Lists minimum and maximum output values for various sensors attached to the control board.
Details displays for VSD frequency, compressor amps, and current limit settings.
Covers displays for VSD DC Bus voltage, internal ambient temperature, IGBT baseplate temps, precharge signal, and motor overload settings.
Provides a table of compressor motor overload settings based on model, voltage, and frequency.
Explains how to view compressor operating hours and start counts using the dedicated key.
Details how to use the HISTORY key to access normal and fault shutdown history buffers.
Explains fault history numbering, types of unit faults, and ALL FAULT conditions.
Describes unit data displays for evaporator temperatures and ambient air temperature at the time of a fault.
Details displays for load/unload timers, temp errors, lead system, pump/heater status, remote control, and sound limits.
Lists VSD data displays including frequency, compressor amps, current limits, DC bus voltage, ambient temp, baseplate temp, and overload settings.
Shows displays for precharge signal, compressor settings, system pressures, temperatures, and motor temps.
Details displays for condenser subcooling, drain valve position, fan status, and VI solenoid status.
Explains displays for compressor run time, system run signals, and operating hours/starts.
Details displays for setpoints, remote settings, display language, cooling mode, control mode, and display units.
Covers configuration of system lead/lag modes, remote reset inputs, and remote current limit inputs.
Details settings for remote sound limits and various program values like suction pressure cutout and motor current limit.
Explains programming for sound limit setpoint, eductor differential temperature, and eductor safety time.
Details the programmable motor temperature unload setting.
Guides on using the SETPOINTS key to program cooling setpoints, ranges, and remote settings.
Provides a table of low, high, and default limits for various setpoints, including temperature and control ranges.
Explains how to enter Program Mode and configure the suction pressure cutout parameter.
Details programming for low ambient and low leaving liquid temperature cutouts.
Covers programming for motor current limit, pulldown current limit, and pulldown limit time.
Explains programming for motor temperature unload, subcooling setpoint, and unit ID number.
Lists default, low, and high limits for all programmable operating parameters.
Guides on using the OPTIONS key to view configuration and select the display language.
Details how to select between local and remote control modes for chilled liquid temperature.
Covers selecting display units (Imperial/SI) and system lead/lag control modes.
Explains configuration options for remote temperature reset and remote current limit inputs.
Details selections for remote sound limit input and enabling/disabling low ambient cutout.
Covers the option for variable water outlet control, typically for Edo-Design compliance.
Guides on setting the date, day of the week, day of the month, and month using the DATE/TIME key.
Details how to set the year, hour, minute, and AM/PM values using the DATE/TIME key.
Explains how to select and program unit operating and sound limit schedules.
Covers programming of daily unit operating schedules, including holiday settings.
Details how to program the sound limit schedule, including start/stop times and speed reduction.
Explains how to use the MANUAL OVERRIDE key for emergencies or servicing and its safety implications.
Describes how to use the PRINT key to generate reports of operating data, history buffers, or specific faults.
Provides a sample of the operating data printout, showing current system conditions for various unit configurations.
Explains that history printouts store data at the time of faults or normal shutdowns, providing fault details.
Details how to turn individual systems ON/OFF and reset safety lockouts using the SYSTEM SWITCHES key.
Outlines the need for regular maintenance, owner responsibility, and reading safety sections before maintenance.
Lists weekly maintenance tasks including checking unit status, refrigerant leaks, operating conditions, oil levels, and refrigerant charge.
Provides detailed steps for safely removing and evacuating refrigerant from the YVAA chiller system.
Details the steps for charging refrigerant into the system, including monitoring pressure and temperature.
Explains the importance of coil cleaning and outlines procedures for standard and Environment Guard coils.
Provides quarterly and monthly cleaning procedures for Environment Guard Premium coils, including specific solutions.
Outlines scheduled maintenance intervals and the importance of checking the thermal dispersion flow switch.
Discusses the chiller/compressor operating log and safety precautions before applying power.
Details measures to prevent evaporator freeze damage, including power retention, heater options, and glycol concentration.
Presents a table outlining recommended maintenance checks categorized by frequency (weekly, quarterly, annually, etc.).
Provides troubleshooting steps for issues like no display, line fuse blowing, and low ambient/high ambient/low leaving liquid faults.
Addresses troubleshooting for high discharge pressure, high discharge temperature, high motor temperature, and low suction pressure.
Covers troubleshooting for motor current limiting, VSD faults like high baseplate temperature, and low DC bus voltage.
Provides a table for converting R-134a pressures to saturated temperatures.
Provides a table for converting R-513A pressures to saturated temperatures.
Offers a table for converting R-513A temperatures to equivalent pressures.
Lists input voltage data for chilled liquid and suction temperature sensors.
Provides input voltage data for outside air temperature sensors based on ambient temperature.
Lists output voltage data for suction pressure and discharge pressure transducers.
Provides resistance values for motor temperature sensors at various temperature points.
Details procedures for safely handling and disposing of refrigerant and used compressor oil.
Covers electrical isolation, unit removal, and dismantling procedures for safe decommissioning.
Lists conversion factors for capacity, power, flow rate, length, weight, velocity, and pressure drop from English to SI units.
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