User ManualTable of Contents160.49-O2 (1296)1CENTRIFUGAL LIQUID CHILLERS1OPERATING & MAINTENANCE1MODEL YK M3 M3 G4 THRU YK S6 S4 J2 (STYLE C)1MODEL YK LB LB G4 THRU YK SE SC J4 (STYLE C)1W ARNING1TABLE OF CONTENTS2REFERENCE INSTRUCTIONS2NOMENCLATURE3R-22 UNITS3R-134a3SECTION 14DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION4FIG. 1 – MODEL YK MILLENNIUM CHILLER4SYSTEM OPERATION DESCRIPTION (See Fig. 2)4DETAIL A – COMPRESSOR PREROTATION VANES5CAPACITY CONTROL5FIG. 2 – REFRIGERANT FLOW-THRU CHILLER5SECTION 26MICROCOMPUTER CONTROL CENTER6FIG. 3 – MICROCOMPUTER CONTROL CENTER AND KEYPAD6WARNING6INTRODUCTION7CONTROL CENTER8OPERATION8FIG. 4 – SYSTEM PARAMETERS – OUT OF RANGE READINGS9SYSTEM SETPOINTS10DISPLAYING SYSTEM SETPOINTS12PROGRAMMING14THE MICROCOMPUTER CONTROL CENTER14PROGRAMMING SYSTEM SETPOINTS14FIG. 5 – KEYPAD – PROGRAMMING SYSTEMSETPOINTS14FIG. 6 – KEYPAD – PROGRAMMING “LEAVING CHILLED WATER TEMP” SETPOINT15FIG. 7 – KEYPAD – PROGRAMMING “% CURRENT LIMIT” SETPOINT15FIG. 8 – KEYPAD – PROGRAMMING “PULL DOWN DEMAND” SETPOINT16FIG. 9 – KEYPAD – PROGRAMMING “CLOCK” SETPOINT16FIG. 10 – KEYPAD – PROGRAMMING “DAILY SCHEDULE” SETPOINT17FIG. 11 – KEYPAD – PROGRAMMING “HOLIDAY” SETPOINT18FIG. 12 – KEYPAD – PROGRAMMING “REMOTE RESET TEMP RANGE18SERVICE KEYS19FIG. 13 – KEYPAD – SERVICE KEYS LOCATION19OTHER SERVICE KEYS20OPERATING MODES21COMPRESSOR SWITCH22DISPLAY MESSAGES22FIG. 14 – MICROCOMPUTER CONTROL CENTER LOCATION OF REAL TIME CLOCK U16 RTC IC CHIP29SECTION 330SYSTEM OPERATING PROCEDURES30WARNING30START-UP PROCEDURE30START-UP31CHILLER OPERATION31SYSTEM STARTING & SHUTDOWN SEQUENCE32FIG. 15 – CHILLER STARTING SEQUENCE & SHUTDOWN SEQUENCE32Condenser Water Temperature Control32CHECKING OPERATION33OPERATING LOG SHEET33FIG. 16 – LIQUID CHILLER LOG SHEETS33OPERATING INSPECTIONS – See Section 234NEED FOR MAINTENANCE OR SERVICE35NORMAL AND SAFETY SYSTEM SHUTDOWNS35SAFETY SHUTDOWNS35CYCLING SHUTDOWNS35STOPPING THE SYSTEM35PROLONGED SHUTDOWN36START-UP AFTER PROLONGED SHUTDOWN36SECTION 437SYSTEM COMPONENTS DESCRIPTION37FRONT VIEW37FIG. 17 – SYSTEM COMPONENTS37GENERAL38COMPRESSOR38CAPACITY CONTROL38COMPRESSOR LUBRICATION SYSTEM38OIL PUMP38FIG. 18 – SCHEMATIC DRAWING – (YK) COMPRESSOR LUBRICATION SYSTEM39OIL HEATER40MOTOR DRIVELINE40HEAT EXCHANGERS40REFRIGERANT FLOW CONTROL40MICROCOMPUTER CONTROL CENTER41SOLID STATE STARTER41VARIABLE SPEED DRIVE41SECTION 542OPERATIONAL MAINTENANCE42OIL RETURN SYSTEM42FIG. 19 – OIL RETURN SYSTEM42THE OIL CHARGE43OIL CHARGING PROCEDURE43FIG. 20 – CHARGING OIL RESERVOIR WITH OIL43SECTION 644TABLE 1 – CAUSES OF NORMAL AND SAFETY SYSTEM SHUTDOWNS IN ACCORDANCE WITH THE MICROCOMPUTER CONTROL, CENTER DISPLAY44TABLE 2 – OPERATING ANALYSIS CHART47SECTION 749MAINTENANCE49RENEWAL PARTS49CHECKING SYSTEM FOR LEAKS49EVACUATION AND DEHYDRATION OF UNIT49FIG. 21 – EVACUATION OF CHILLER49TABLE 3 – SYSTEM PRESSURES50VACUUM TESTING50VACUUM DEHYDRATION51OPERATION51FIG. 22 – SATURATION CURVE51REFRIGERANT CHARGING52TABLE 4 – REFRIGERANT CHARGE52CHECKING THE REFRIGERANT CHARGE52HANDLING REFRIGERANT FOR53MEGGING THE MOTOR53FIG. 23 – DIAGRAM, MEGGING MOTOR WINDINGS53FIG. 24 - MOTOR STATOR TEMPERATURE AND INSULATION RESISTANCES54CONDENSERS AND COOLERS55GENERAL55CHEMICAL WATER TREATMENT55CLEANING COOLER AND CONDENSER TUBES55TUBE CLEANING PROCEDURES55COMMERCIAL ACID CLEANING55TESTING FOR COOLER AND CONDENSER TUBE LEAKS56COMPRESSOR57ELECTRICAL CONTROLS57SECTION 858PREVENTIVE MAINTENANCE58COMPRESSOR58COMPRESSOR MOTOR58PRESSURE TESTING58COOLER AND CONDENSER58OIL RETURN SYSTEM58ELECTRICAL CONTROLS59MAIN MENU1Size: 2.03 MBPages: 60Language: EnglishOpen manual