York YK M3 M3 G4 operation manual Microcomputer Control Center, Programming System Setpoints

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PROGRAMMING

THE MICROCOMPUTER CONTROL CENTER

PROGRAMMING SYSTEM SETPOINTS

The system setpoints can be entered at any time . . . . .

even when the system is running. Proceed as follows to enter system setpoints. (Refer to Fig. 5.)

1.Press ACCESS CODE key.

2. ENTER VALID ACCESS CODE _ _ _ _ is displayed.

3.Using ENTRY keys, enter 9 6 7 5.

4.As each digit is entered, the characters Y O R K are displayed.

NOTE: If digits other than 9 6 7 5 are entered, Y O R K is still displayed.

NOTE: For ease in remembering the code, note that the letters Y O R K correspond to the dig- its 9 6 7 5 on a telephone dial.

5. Press ENTER key.

NOTE: If digits other than 9 6 7 5 were entered in step No. 4, INVALID ACCESS CODE is displayed when the ENTER key is pressed. If this oc- curs, enter the correct access code (9675) and proceed.

6. ACCESS TO PROGRAM KEY AUTHORIZED is displayed.

NOTE: Unless terminated by pressing the ACCESS CODE key again, the operator will have ac- cess to the PROGRAM key for 10 minutes. When 10 minutes have elapsed, access to PROGRAM key will be automatically disabled and the operator must return to step No. 1 to gain access.

7. Press PROGRAM key.

8. PROGRAM MODE, SELECT SETPOINT is displayed.

LD00954

FIG. 5 – KEYPAD – PROGRAMMING SYSTEM SETPOINTS

9.Enter setpoints as detailed below. If you make a mis- take when entering a value, press CANCEL key and then ENTER key.The display will revert to the default values and the cursor will return to the first change- able digit. You can then proceed to enter the correct values. If the entered value exceeds acceptable lim- its, OUT OF RANGE – TRY AGAIN!

message will be displayed for 2 seconds, then the

PROGRAM MODE, SELECT SETPOINT message will re- appear.

10.When all the desired setpoints have been entered, press the ACCESS CODE key to exit PROGRAM mode and terminate access to PROGRAM mode.

ACCESS TO PROGRAM MODE DISABLED is displayed. The Control Center will automatically return to LO- CAL, REMOTE or SERVICE mode . . . . whichever was last selected.

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YORK INTERNATIONAL

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Contents Centrifugal Liquid Chillers With Microcomputer Control CenterTable of Contents Nomenclature System Operation Description See Fig SectionDescription of System and Fundamentals of Operation Detail a Compressor Prerotation Vanes Capacity ControlSection Microcomputer Control Center Microcomputer Control Center and KeypadIntroduction Condenser Refrigerant LevelDisplaying System Parameters Control CenterOperation Psid = HOP LP Offset Pressure To Display Chilled Liquid TemperaturesTo Display OIL Pressure System Setpoints To Display Motor CurrentTo Display Operating Hours and Starts Counter See Programming System Setpoints, Displaying System Setpoints To Display Undervoltage setpoints Microcomputer Control Center Press Access Code keyProgramming 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 Therefore Function Jumper PositionThen MON Xxxx AM High Line Voltage MON Xxxx AM High Speed Drain Temp OIL Heaters Checking the OIL Level in the OIL System Operating ProceduresSTART-UP Procedure ReservoirSTART-UP Chiller OperationCondenser Water Temperature Control Chiller Starting Sequence & Shutdown SequenceChecking Operation EcwtLchwt Operating LOG SheetWeekly Operating Inspections See SectionDaily QuarterlySafety Shutdowns Need for Maintenance or ServiceNormal and Safety System Shutdowns Cycling ShutdownsProlonged Shutdown START-UP After Prolonged ShutdownSystem Components Description System ComponentsCompressor Lubrication System See Fig GeneralCompressor Speed Increasing GearsSchematic Drawing YK Compressor Lubrication System Heat Exchangers OIL HeaterMotor Driveline Refrigerant Flow ControlVariable Speed Drive Optional Microcomputer Control Center See SectionSolid State Starter Optional Changing the Dehydrator Operational MaintenanceOIL Return System OIL Charging Procedure OIL ChargeTroubleshooting RiseLEP Operating Setpoints System After Service Symptom High Cooler Pressure Operating Analysis ChartSymptom Abnormally LOW Suction Pressure Symptom no OIL Pressure When System Start Button PushedSymptom Reduced OIL Pump Capacity Symptom OIL Pump Vibrates or is NoisySymptom OIL Pump Fails to Deliver OIL Pressure OIL Pressure display keyConducting R-22 Pressure Test MaintenanceLeak Testing During Operation Vacuum Testing System PressuresVacuum Dehydration OperationRefrigerant Charge Refrigerant ChargingChecking the Refrigerant Charge During Unit Shutdown 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 ControlsCompressor Motor Preventive MaintenancePressure Testing 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.

Another notable aspect of the YK M3 M3 G4 is its robust refrigeration technology. Utilizing high-efficiency scroll compressors, these chillers deliver impressive cooling capacities while maintaining high energy efficiency ratings. Integrated with low GWP (Global Warming Potential) refrigerants, they meet modern environmental standards, ensuring compliance with regulations while promoting sustainability.

The YK LB LB G4 and YK SE SC J4 models further enhance York’s portfolio with their compact designs and lower installation footprints. These chillers are ideal for applications where space is at a premium. Additional features include advanced noise reduction technology, allowing for quieter operation compared to traditional HVAC systems, making them suitable for urban environments or buildings where noise control is a priority.

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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