York YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4 operation manual Operating Modes

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NO. 6

ACTUAL POS = XX MILS; REF = YY MILS – ACTUAL POS is

the distance between the high speed thrust collar and the proximity probe that is used to measure the position. REF is the reference position established at time of com- pressor manufacture.

NO. 7

HIGH SPEED DRAIN TEMP = XXX.X °F – Temperature of oil in high speed drain line.

FORM 160.49-O2

To hold any of the above messages, press the DISPLAY DATA key, then press the DISPLAY HOLD key. The message will be displayed and updated every 2 sec- onds until the DISPLAY DATA key is pressed again, whereupon the next message is displayed. To return to the normal foreground messages, press the DISPLAY HOLD key.

HISTORY PRINT – This key is used to initiate a history print to the optional printer. Refer to Form 160.49-N7 for operation of this key.

OPERATING MODES

The MicroComputer Control Center can be operated in four different operating modes as follows:

SERVICE – enables all the Service keys except DIS- PLAY DATA, MANUAL OIL PUMP, and HISTORY PRINT, which are enabled in all modes. See “Service Keys”, page 20.

LOCAL – This is the normal operating mode.The com- pressor can be started and stopped from the Control Center. Also, the Display and Setpoints parameters can be displayed.

PROGRAM – Allows the operator to program the Set- points parameters, and change operating modes.

REMOTE – In this mode, the Control Center will ac- cept control signals from a remote device (i.e., Energy Management System) or cycling input. The control sig- nal inputs are:

1.Remote Start

2.Remote Stop

3.Remote LCWT Setpoint

4.Remove Current Limit Setpoint

NOTE: The compressor can be stopped by the COM- PRESSOR switch, regardless of the operating mode. The switch must be in RUN position to enable REMOTE mode. The operator cannot locally start the compressor using the COM- PRESSOR switch when in the REMOTE mode.

To determine which operating mode the Control Center is presently in, simply press the MODE key.

• If the Control Center is in LOCAL mode,

 

LOCAL OPERATING MODE IN EFFECT

 

is displayed.

• If the Control Center is in REMOTE mode,

 

REMOTE OPERATING MODE IN EFFECT

 

is displayed.

• If the Control Center is in SERVICE mode,

 

SERVICE OPERATING MODE IN EFFECT

 

is displayed.

 

 

 

 

To change operating mode, proceed as follows:

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.

5.Press ENTER key.

NOTE: If digits other than 9 6 7 5 were entered in

 

step No. 4,

INVALID ACCESS

CODE

is dis-

 

played when the ENTER key is pressed. If

 

this occurs, enter the correct access code

 

(9675) and proceed.

 

 

6.

 

 

is displayed.

ACCESS TO PROGRAM KEY AUTHORIZED

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 dis- abled and the operator must return to step No. 1 to gain access.

YORK INTERNATIONAL

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Contents With Microcomputer Control Center Centrifugal Liquid ChillersTable of Contents Nomenclature Section Description of System and Fundamentals of OperationSystem Operation Description See Fig Capacity Control Detail a Compressor Prerotation VanesMicrocomputer Control Center and Keypad Section Microcomputer Control CenterCondenser Refrigerant Level IntroductionControl 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 Programming Press Access Code keyMicrocomputer Control Center Programming System SetpointsSolid State Starter, refer to Fig Electro-Mechanical Starter, refer to FigSetpoint Keypad Programming Pull Down Demand SetpointKeypad Programming Daily Schedule Setpoint Keypad Programming Holiday PRE-ROTATION Vanes Keys Service KeysPulldn Level = XXX% Setp = XXX% Actual = XXX% Other Service KeysOperating Modes Display Messages Compressor SwitchSystem 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 START-UP Procedure System Operating ProceduresOIL Heaters Checking the OIL Level in the OIL ReservoirChiller Operation START-UPChiller Starting Sequence & Shutdown Sequence Condenser Water Temperature ControlLchwt EcwtChecking Operation Operating LOG SheetDaily Operating Inspections See SectionWeekly QuarterlyNormal and Safety System Shutdowns Need for Maintenance or ServiceSafety Shutdowns Cycling ShutdownsSTART-UP After Prolonged Shutdown Prolonged ShutdownSystem Components System Components DescriptionCompressor GeneralCompressor Lubrication System See Fig Speed Increasing GearsSchematic Drawing YK Compressor Lubrication System Motor Driveline OIL HeaterHeat Exchangers Refrigerant Flow ControlMicrocomputer Control Center See Section Solid State Starter OptionalVariable Speed Drive Optional Operational Maintenance OIL Return SystemChanging the Dehydrator OIL Charge OIL Charging ProcedureRise TroubleshootingLEP Operating Setpoints System After Service Symptom Abnormally LOW Suction Pressure Operating Analysis ChartSymptom High Cooler Pressure Symptom no OIL Pressure When System Start Button PushedSymptom OIL Pump Fails to Deliver OIL Pressure Symptom OIL Pump Vibrates or is NoisySymptom Reduced OIL Pump Capacity OIL Pressure display keyMaintenance Leak Testing During OperationConducting R-22 Pressure Test System Pressures Vacuum TestingOperation Vacuum DehydrationRefrigerant Charging Checking the Refrigerant Charge During Unit ShutdownRefrigerant Charge Megging the Motor Handling Refrigerant for Dismantling and RepairsMotor Stator Temperature and Insulation Resistances Condensers and Coolers Testing for Cooler and Condenser Tube Leaks Electrical Controls CompressorPressure Testing Preventive MaintenanceCompressor 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.

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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