Document Outline

• 160.49-O2 (1296)
• CENTRIFUGAL LIQUID CHILLERS
• OPERATING & MAINTENANCE
• MODEL YK M3 M3 G4 THRU YK S6 S4 J2 (STYLE C)
• MODEL YK LB LB G4 THRU YK SE SC J4 (STYLE C)
• W ARNING
• TABLE OF CONTENTS
• REFERENCE INSTRUCTIONS
• NOMENCLATURE
  • R-22 UNITS
  • R-134a
• SECTION 1
  • DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION
    • FIG. 1 – MODEL YK MILLENNIUM CHILLER
    • SYSTEM OPERATION DESCRIPTION (See Fig. 2)
    • DETAIL A – COMPRESSOR PREROTATION VANES
    • CAPACITY CONTROL
    • FIG. 2 – REFRIGERANT FLOW-THRU CHILLER
• SECTION 2
  • MICROCOMPUTER CONTROL CENTER
    • FIG. 3 – MICROCOMPUTER CONTROL CENTER AND KEYPAD
    • WARNING
    • INTRODUCTION
    • CONTROL CENTER
    • OPERATION
    • FIG. 4 – SYSTEM PARAMETERS – OUT OF RANGE READINGS
    • SYSTEM SETPOINTS
    • DISPLAYING SYSTEM SETPOINTS
  • PROGRAMMING
    • THE MICROCOMPUTER CONTROL CENTER
      • PROGRAMMING SYSTEM SETPOINTS
      • FIG. 5 – KEYPAD – PROGRAMMING SYSTEMSETPOINTS
      • FIG. 6 – KEYPAD – PROGRAMMING “LEAVING CHILLED WATER TEMP” SETPOINT
      • FIG. 7 – KEYPAD – PROGRAMMING “% CURRENT LIMIT” SETPOINT
      • FIG. 8 – KEYPAD – PROGRAMMING “PULL DOWN DEMAND” SETPOINT
      • FIG. 9 – KEYPAD – PROGRAMMING “CLOCK” SETPOINT
      • FIG. 10 – KEYPAD – PROGRAMMING “DAILY SCHEDULE” SETPOINT
      • FIG. 11 – KEYPAD – PROGRAMMING “HOLIDAY” SETPOINT
      • FIG. 12 – KEYPAD – PROGRAMMING “REMOTE RESET TEMP RANGE
  • SERVICE KEYS
    • FIG. 13 – KEYPAD – SERVICE KEYS LOCATION
    • OTHER SERVICE KEYS
  • OPERATING MODES
  • COMPRESSOR SWITCH
  • DISPLAY MESSAGES
  • FIG. 14 – MICROCOMPUTER CONTROL CENTER LOCATION OF REAL TIME CLOCK U16 RTC IC CHIP
• SECTION 3
  • SYSTEM OPERATING PROCEDURES
    • WARNING
    • START-UP PROCEDURE
    • START-UP
    • CHILLER OPERATION
    • SYSTEM STARTING & SHUTDOWN SEQUENCE
    • FIG. 15 – CHILLER STARTING SEQUENCE & SHUTDOWN SEQUENCE
    • Condenser Water Temperature Control
    • CHECKING OPERATION
    • OPERATING LOG SHEET
    • FIG. 16 – LIQUID CHILLER LOG SHEETS
    • OPERATING INSPECTIONS – See Section 2
    • NEED FOR MAINTENANCE OR SERVICE
    • NORMAL AND SAFETY SYSTEM SHUTDOWNS
    • SAFETY SHUTDOWNS
    • CYCLING SHUTDOWNS
    • STOPPING THE SYSTEM
    • PROLONGED SHUTDOWN
    • START-UP AFTER PROLONGED SHUTDOWN
• SECTION 4
  • SYSTEM COMPONENTS DESCRIPTION
    • FRONT VIEW
    • FIG. 17 – SYSTEM COMPONENTS
    • GENERAL
    • COMPRESSOR
    • CAPACITY CONTROL
    • COMPRESSOR LUBRICATION SYSTEM
    • OIL PUMP
    • FIG. 18 – SCHEMATIC DRAWING – (YK) COMPRESSOR LUBRICATION SYSTEM
    • OIL HEATER
    • MOTOR DRIVELINE
    • HEAT EXCHANGERS
    • REFRIGERANT FLOW CONTROL
    • MICROCOMPUTER CONTROL CENTER
    • SOLID STATE STARTER
    • VARIABLE SPEED DRIVE
• SECTION 5
  • OPERATIONAL MAINTENANCE
    • OIL RETURN SYSTEM
    • FIG. 19 – OIL RETURN SYSTEM
    • THE OIL CHARGE
    • OIL CHARGING PROCEDURE
    • FIG. 20 – CHARGING OIL RESERVOIR WITH OIL
• SECTION 6
  • TABLE 1 – CAUSES OF NORMAL AND SAFETY SYSTEM SHUTDOWNS IN ACCORDANCE WITH THE MICROCOMPUTER CONTROL, CENTER DISPLAY
  • TABLE 2 – OPERATING ANALYSIS CHART
• SECTION 7
  • MAINTENANCE
    • RENEWAL PARTS
    • CHECKING SYSTEM FOR LEAKS
    • EVACUATION AND DEHYDRATION OF UNIT
    • FIG. 21 – EVACUATION OF CHILLER
    • TABLE 3 – SYSTEM PRESSURES
    • VACUUM TESTING
    • VACUUM DEHYDRATION
    • OPERATION
    • FIG. 22 – SATURATION CURVE
    • REFRIGERANT CHARGING
      • TABLE 4 – REFRIGERANT CHARGE
    • CHECKING THE REFRIGERANT CHARGE
    • HANDLING REFRIGERANT FOR
    • MEGGING THE MOTOR
      • FIG. 23 – DIAGRAM, MEGGING MOTOR WINDINGS
      • FIG. 24 - MOTOR STATOR TEMPERATURE AND INSULATION RESISTANCES
    • CONDENSERS AND COOLERS
      • GENERAL
      • CHEMICAL WATER TREATMENT
      • CLEANING COOLER AND CONDENSER TUBES
      • TUBE CLEANING PROCEDURES
      • COMMERCIAL ACID CLEANING
      • TESTING FOR COOLER AND CONDENSER TUBE LEAKS
    • COMPRESSOR
    • ELECTRICAL CONTROLS
• SECTION 8
  • PREVENTIVE MAINTENANCE
  • COMPRESSOR
    • COMPRESSOR MOTOR
    • PRESSURE TESTING
    • COOLER AND CONDENSER
    • OIL RETURN SYSTEM
    • ELECTRICAL CONTROLS
• PRINT
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