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

Page 45

YORK INTERNATIONAL

45

 

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Low Evap.

 

Low Evap.

54.3

54.4

 

To restart, press

See OPERATION

 

 

 

Pressure

 

Pressure

PSIG (R-22)

PSIG (R-22)

 

compressor switch

ANALYSIS Table 2

 

 

 

 

 

Transducer

25

25.1

 

from STOP/RESET

Symptom 2

 

 

 

 

 

(LEP)

PSIG (R-134a)

PSIG (R-134a)

 

to START position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Low Evap.

 

LEP external

Set to Job

Set to Job

 

To restart, press

See OPERATION

 

 

 

Pressure

 

control (Brine

Spec.

Spec.

 

compressor switch

ANALYSIS Table 2

 

 

 

Brine

 

units only)

 

 

 

from STOP/RESET

Symptom 2.

 

 

 

 

 

 

 

 

 

to START position

 

 

 

MON.

10:00 AM

Low Oil

 

Low Oil

25

15

 

Will restart when

Refer to OPERATION

 

 

 

Pressure

 

Pressure

PSID

PSID

 

pressure increases

ANALYSIS Table 2

 

 

 

 

 

Transducer

 

 

 

to 25 PSID. To

Symptoms 4, 5, 6, 7,

 

 

 

 

 

(OP)

 

 

 

restart, press com-

9, 10, 11

 

 

 

 

 

 

 

 

 

 

pressor switch from

 

 

 

 

 

 

 

 

 

 

 

STOP/RESTART to

 

 

 

 

 

 

 

 

 

 

 

START position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

High

 

High Pressure

265

205

 

Will restart when

See Operational

 

 

 

Pressure

 

Safety Control

PSIG (R-22)

PSIG (R-22)

 

Pressure falls to

Analysis Table 2

 

 

 

 

 

(HP)

180

120

 

205 PSIG. To restart

Symptom 1 High

 

 

 

 

 

 

PSIG (R-134a)

PSIG (R-134a)

 

press compressor

Discharge Pressure

 

 

 

 

 

 

 

 

 

switch from STOP/

 

 

 

 

 

 

 

 

 

 

 

RESET to START

 

 

 

 

 

 

 

 

 

 

 

position

 

 

 

MON.

10:00 AM

Evap. Trans.

 

Evap. Pressure

 

 

 

To restart press

Defective Evap. Pressure

 

 

 

or Probe

 

Transducer or

 

 

 

compressor switch

Transducer or Leaving

 

 

 

Error

 

Leaving Chilled

 

 

 

from STOP/RESET

Chilled Water thermistor

 

 

 

 

 

Water Thermis-

 

 

 

to START position

(RS1). LCWT minus satu-

 

 

 

 

 

tor (RS1)

 

 

 

 

ration temperature is less

 

 

 

 

 

 

 

 

 

 

than –2.5°F or greater than

 

 

 

 

 

 

 

 

 

 

25°F. Checked every 10

 

 

 

 

 

 

 

 

 

 

minutes following a 10 min.

 

 

 

 

 

 

 

 

 

 

bypass at start-up.

 

MON.

10:00 AM

Motor Con-

 

CM2 or Solid

 

 

 

Reset the device

CM2, or Solid State

 

 

 

troller – Ext.

 

State Starter

 

 

 

that caused the shut-

Starter has shutdown

 

 

 

Reset

 

(RT2)

 

 

 

down. Chiller will

chiller

 

 

 

 

 

 

 

 

 

start automatically.

 

 

 

MON.

10:00 AM

High

 

Discharge Temp.

220°F

219°F

 

To restart press

Condenser tubes dirty or

 

 

 

Discharge

 

Thermistor

 

 

 

compressor switch

scaled or high condenser

 

 

 

Temp.

 

(RT2)

 

 

 

from STOP/RESET

water temperature. (See

 

 

 

 

 

 

 

 

 

to START position.

Symptom 1, Table 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

High Oil

 

Oil Temperature

170°F

169°F

 

To restart press

Dirty oil filter or restricted

 

 

 

Temp.

 

Thermistor

 

 

 

compressor switch

oil cooler line. Change oil

 

 

 

 

 

(RT3)

 

 

 

from STOP/RESET

filter. Refer to OPERATION

 

 

 

 

 

 

 

 

 

to START position

ANALYSIS Table 2,

 

 

 

 

 

 

 

 

 

 

Symptom 9.

 

MON.

10:00 AM

Power

Auto-Restart

Micro Board

8.29VDC

7.84VDC

Optional AUTO

Will restart automa-

Power Failure.

 

 

 

Failure

 

undervoltage

 

 

Restart Plug is

tically when voltage

 

 

 

 

 

 

 

circuit on 5V

 

 

installed on

reaches 8.29VDC.

 

 

 

 

 

 

 

unregulated

 

 

Micro Board

An undervoltage

 

 

 

 

 

 

 

supply

 

 

 

circuit on the Micro

 

 

 

 

 

 

 

 

 

 

 

Board monitors the

 

 

 

 

 

 

 

 

 

 

 

5VC unregulated

 

 

 

 

 

 

 

 

 

 

 

supply for an under-

 

 

 

 

 

 

 

 

 

 

 

voltage condition.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Power

 

Micro Board

8.29VDC

7.84VDC

Auto restart plug

To restart, press

Power Failure

 

 

 

Failure

 

undervoltage

 

 

is removed on

compressor switch

 

 

 

 

 

 

 

circuit on 5V

 

 

Micro Board

to STOP-RESET

 

 

 

 

 

 

 

unregulated

 

 

 

Position and then to

(Continued on page 46)

 

 

 

 

 

supply

 

 

 

START position

 

 

 

 

 

 

 

 

 

 

 

 

FORM 160.49-O2

Image 45
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.