Carrier 16JT Series Start Up & Operation Manual
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Contents
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CONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3MACHINE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 3-9Basic Absorption Cycle . . . . . . . . . . . . . . . . . . . . . . 3Double-Effect Reconcentration . . . . . . . . . . . . . . . . 3Machine Construction . . . . . . . . . . . . . . . . . . . . . . . . 3Flow Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Equilibrium Diagram and ChillerSolution Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7• PLOTTING THE SOLUTION CYCLEPurge System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9MACHINE CONTROLS . . . . . . . . . . . . . . . . . . . . . 10-19Start-Stop Systems . . . . . . . . . . . . . . . . . . . . . . . . . 10• SEMI-AUTOMATIC START-STOP• FULL AUTOMATIC START-STOPControl Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Typical Control Sequence, Normal Start . . . . . . 14Typical Control Sequence, Normal Stop . . . . . . 16Typical Control Sequence,Abnormal Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18• CONTROLLERHigh Concentration Limit . . . . . . . . . . . . . . . . . . . . 19Low Concentration Limit . . . . . . . . . . . . . . . . . . . . 19High-Stage Generator Level Limit . . . . . . . . . . . . 19BEFORE INITIAL START-UP . . . . . . . . . . . . . . . . 19-22Job Data and Tools Required . . . . . . . . . . . . . . . . 19Inspect Field Piping . . . . . . . . . . . . . . . . . . . . . . . . . 20Inspect Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 20Standing Vacuum Test . . . . . . . . . . . . . . . . . . . . . . 20• LONG INTERVAL TEST• SHORT INTERVAL TESTMachine Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . 21Solution and Refrigerant Charging . . . . . . . . . . . 21• HANDLING LITHIUM BROMIDE SOLUTION• CHARGING SOLUTION• CHARGING FOR CONDITIONS OTHERTHAN NOMINAL• INITIAL REFRIGERANT CHARGINGINITIAL CONTROL CHECKOUTAND ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 22-24Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Energize Control Circuit . . . . . . . . . . . . . . . . . . . . . 22Check Solution and RefrigerantPump Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Check Pump Starter Overloads . . . . . . . . . . . . . . 22Check Low-Temperature Cutout . . . . . . . . . . . . . . 22Check Cycle-Guard™ Valve . . . . . . . . . . . . . . . . . . 23Check Solution Thermoswitch . . . . . . . . . . . . . . . 23Check High-Stage GeneratorTemperature Thermoswitch . . . . . . . . . . . . . . . . 23Check High-Stage GeneratorPressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 23Check Rotation of Solution andRefrigerant Pumps . . . . . . . . . . . . . . . . . . . . . . . . 23Check Capacity Control Operation . . . . . . . . . . . 23Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . 25-27Preliminary Check . . . . . . . . . . . . . . . . . . . . . . . . . . 25• PREPARATIONPageFinal Adjustment of Capacity Controls . . . . . . . 25• WITH THE MANUAL PROCEDURE• WITH THE AUTOMATIC PROCEDUREFinal Refrigerant Charge Adjustment . . . . . . . . . 25Check Machine Shutdown . . . . . . . . . . . . . . . . . . . 27Check Low-Evaporator Level Operation . . . . . . 27Determine NoncondensableAccumulation Rate . . . . . . . . . . . . . . . . . . . . . . . . 27OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . 27-30Operator Duties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Before Starting Machine . . . . . . . . . . . . . . . . . . . . . 27Start Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Start-Up After Limited Shutdown . . . . . . . . . . . . . 28Start-Up After Extended Shutdown . . . . . . . . . . . 28Start-Up After Below FreezingConditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Machine Shutdown — Normal Conditions . . . . 28Machine Shutdown — Below FreezingConditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Actions After Abnormal Shutdown . . . . . . . . . . . 29Actions After Power Interruption . . . . . . . . . . . . . 29PERIODIC SCHEDULED MAINTENANCE . . . . . . 29Every Day of Operation . . . . . . . . . . . . . . . . . . . . . . 29Every Month of Operation . . . . . . . . . . . . . . . . . . . 29Every 2 Months of Operation . . . . . . . . . . . . . . . . 29Every 6 Months of Operation . . . . . . . . . . . . . . . . 29Every Year of Operation . . . . . . . . . . . . . . . . . . . . . 29Every 3 Years of Operation . . . . . . . . . . . . . . . . . . 29Every 5 Years or 20,000 Hoursof Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29MAINTENANCE PROCEDURES . . . . . . . . . . . . . 29-40Log Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Purge Manual Exhaust Procedure . . . . . . . . . . . . 31Absorber Loss Determination . . . . . . . . . . . . . . . . 31Noncondensable Accumulation Rate . . . . . . . . . 31Machine Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . 33Machine Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . 33Solution or Refrigerant Sampling . . . . . . . . . . . . 34• SOLUTION SAMPLE• REFRIGERANT SAMPLESolution Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Inhibitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Adding Octyl Alcohol . . . . . . . . . . . . . . . . . . . . . . . . 35Removing Lithium Bromide fromRefrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Refrigerant Charge Adjustment . . . . . . . . . . . . . . 35Capacity Control Adjustment . . . . . . . . . . . . . . . . 35Low-Temperature Cutout Adjustment . . . . . . . . . 35Cycle-Guard™ System Operation . . . . . . . . . . . . 35Thermoswitch Adjustment . . . . . . . . . . . . . . . . . . . 36Low-Refrigerant Level Operation . . . . . . . . . . . . . 36Internal Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Service Valve Diaphragm Replacement . . . . . . . 36Hermetic Pump Inspection . . . . . . . . . . . . . . . . . . . 36• DISASSEMBLY• INSPECTION• REASSEMBLY• COMPLETIONSolution Decrystallization . . . . . . . . . . . . . . . . . . . 40Condensing Water Tube Scale . . . . . . . . . . . . . . . 40Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . 41,422 |
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