York YK M3 M3 G4 operation manual Displaying System Setpoints

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DISPLAYING SYSTEM SETPOINTS

The currently programmed Setpoint values can be viewed at any time (see page 22) in SERVICE, LOCAL or REMOTE operating mode as follows:

•Press and release the appropriate Setpoint key – the message will be displayed for 2 seconds.

–or –

•Press and hold the appropriate Setpoint key – the message will be displayed as long as the key is pressed.

–or –

•Press and release the appropriate Setpoint key, then press and release the DISPLAY HOLD key. The mes- sage will be displayed until the DISPLAY HOLD key is again pressed and released, or 10 minutes have elapsed, whichever comes first.

To Display CHILLED LIQUID TEMP Setpoint:

Use CHILLED LIQUID TEMP setpoint key as de- scribed on page 10 to produce the following mes- sage:

LEAVING SETPOINT = XX.X °F

NOTE: The value displayed is the actual LCWT setpoint. For example, the value displayed in LOCAL or PROGRAM modes is that which is operator pro- grammed. The value displayed in the REMOTE mode is that base setpoint with added tempera- ture reset by an Energy Management System, via remote LCWT setpoint (PWM signal) if a re- mote reset signal was received within 30 min- utes.

To Display % CURRENT LIMIT Setpoint:

Use % CURRENT LIMIT setpoint key as described above to produce the following message:

CURRENT LIMIT = XXX % FLA

NOTE: The value displayed is the actual % current limit setpoint. For example, the value displayed in LOCAL or PROGRAM mode is that which is operator programmed. The value displayed in the REMOTE mode is that which has been pro- grammed by the Energy Management System via the remote current limit setpoint input.

If chiller is equipped with a YORK Solid State Starter, the message is:

CURRENT LIMIT = XXX % FLA; *MTR CUR = 000 FLA

NOTE: On Solid State Starter applications, this value is programmed at the YORK factory. A special ac- cess code is required.

To Display PULL DOWN DEMAND Setpoint:

Use PULL DOWN DEMAND setpoint key as de- scribed on page 10 to produce the following mes- sage:

SETPOINT = XXX MIN @ XX % FLA XXX MIN LEFT

To Display CLOCK Setpoint (Time of Day):

Use CLOCK setpoint key as described above to produce the following message:

TODAY IS DAY XX:XX AM/PM 1/1/92

To Display DAILY SCHEDULE Setpoints:

•Press and hold the DAILY SCHEDULE setpoint key.

The chiller start and stop times for each day of the week are sequentially displayed, beginning with Sun- day and ending with Holiday. The display will continu- ously scroll until the DAILY SCHEDULE key is re- leased.

–or –

•Press and release the DAILY SCHEDULE setpoint key. Then press and release the DISPLAY HOLD key. The chiller start and stop times for each day of the week are sequentially displayed beginning with Sunday and ending with Holiday.The display will continuously scroll until the DISPLAY HOLD key is again pressed and released, or 10 minutes have elapsed, whichever comes first.

The display message for DAILY SCHEDULE will scroll in the following sequence:

SUN START = 08:30 AM

STOP = 06:00 PM

 

 

MON START = 05:00 AM

STOP = 07:00 PM

 

 

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YORK INTERNATIONAL

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Contents Centrifugal Liquid Chillers With Microcomputer Control CenterTable of Contents Nomenclature Section Description of System and Fundamentals of OperationSystem Operation Description See Fig Detail a Compressor Prerotation Vanes Capacity ControlSection Microcomputer Control Center Microcomputer Control Center and KeypadIntroduction Condenser Refrigerant LevelControl Center OperationDisplaying System Parameters To Display Chilled Liquid Temperatures To Display OIL PressurePsid = HOP LP Offset Pressure To Display Motor Current To Display Operating Hours and Starts CounterSystem Setpoints See Programming System Setpoints, Displaying System Setpoints To Display Undervoltage setpoints Press Access Code key ProgrammingMicrocomputer Control Center Programming System SetpointsElectro-Mechanical Starter, refer to Fig Solid State Starter, refer to FigKeypad Programming Pull Down Demand Setpoint SetpointKeypad Programming Daily Schedule Setpoint Keypad Programming Holiday Service Keys PRE-ROTATION Vanes KeysOther Service Keys Pulldn Level = XXX% Setp = XXX% Actual = XXX%Operating Modes Compressor Switch Display MessagesSystem RUN Auto Vanes System Shutdown Messages When Control Center is in Remote mode MON Xxxx AM Evap Trans or Probe Error Function Jumper Position ThenTherefore MON Xxxx AM High Line Voltage MON Xxxx AM High Speed Drain Temp System Operating Procedures START-UP ProcedureOIL Heaters Checking the OIL Level in the OIL ReservoirSTART-UP Chiller OperationCondenser Water Temperature Control Chiller Starting Sequence & Shutdown SequenceEcwt LchwtChecking Operation Operating LOG SheetOperating Inspections See Section DailyWeekly QuarterlyNeed for Maintenance or Service Normal and Safety System ShutdownsSafety Shutdowns Cycling ShutdownsProlonged Shutdown START-UP After Prolonged ShutdownSystem Components Description System ComponentsGeneral CompressorCompressor Lubrication System See Fig Speed Increasing GearsSchematic Drawing YK Compressor Lubrication System OIL Heater Motor DrivelineHeat Exchangers Refrigerant Flow ControlMicrocomputer Control Center See Section Solid State Starter OptionalVariable Speed Drive Optional Operational Maintenance OIL Return SystemChanging the Dehydrator OIL Charging Procedure OIL ChargeTroubleshooting RiseLEP Operating Setpoints System After Service Operating Analysis Chart Symptom Abnormally LOW Suction PressureSymptom High Cooler Pressure Symptom no OIL Pressure When System Start Button PushedSymptom OIL Pump Vibrates or is Noisy Symptom OIL Pump Fails to Deliver OIL PressureSymptom Reduced OIL Pump Capacity OIL Pressure display keyMaintenance Leak Testing During OperationConducting R-22 Pressure Test Vacuum Testing System PressuresVacuum Dehydration OperationRefrigerant Charging Checking the Refrigerant Charge During Unit ShutdownRefrigerant Charge Handling Refrigerant for Dismantling and Repairs Megging the MotorMotor Stator Temperature and Insulation Resistances Condensers and Coolers Testing for Cooler and Condenser Tube Leaks Compressor Electrical ControlsPreventive Maintenance Pressure TestingCompressor Motor Cooler and CondenserElectrical Controls ALL Rights Reserved

YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4, YK M3 M3 G4 specifications

The York YK M3 M3 G4, YK M3 M3 G4 THRU YK S6 S4 J2, and YK LB LB G4 THRU YK SE SC J4 represent a sophisticated line of HVAC systems engineered for modern commercial applications. These models are celebrated for their innovative designs, energy efficiency, and advanced features, making them a preferred choice among facility managers and building owners.

One of the standout characteristics of the York YK series is its modular construction, which provides unparalleled flexibility in system configuration. This design allows for easy upgrades and expansions as building demands evolve. The YK M3 series, in particular, is equipped with advanced controls that enhance system performance while minimizing energy consumption. With features like variable speed drives and sophisticated control algorithms, these units optimize airflow and refrigerant use, significantly reducing operational costs.

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Furthermore, York's commitment to continuous innovation is evident in the incorporation of smart technology across its chiller series. Features such as connectivity options for monitoring and diagnostics through mobile apps or web interfaces empower users to maintain optimal system performance proactively. This connectivity aids in predictive maintenance, enabling timely interventions that extend equipment life and reliability.

Finally, all these high-efficiency chillers are backed by York's renowned service support network, ensuring that customers have access to expert assistance and maintenance services whenever needed. With their exceptional features, modern technologies, and commitment to sustainability, the York YK M3 M3 G4, YK M3 M3 G4 THRU YK S6 S4 J2, and YK LB LB G4 THRU YK SE SC J4 models stand out as leaders in the commercial HVAC market, setting new standards for performance and efficiency.
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