19Dm-3Ssm.Pdf
Total Page：16
File Type：pdf, Size：1020Kb
Contents List of Tables List of Figures Introduction Abbreviations Definitions Controls General Processor Board Input/Output Board Set Point/Display Board Safety Controls Reset Pushbutton Deadband Proportional Band Contents Ramp Loading Capacity Overrides Diffuser Wall Position Control Excessive Purge Pump Run Time Oil Heater and Thermostat Remote Start/Stop Controls Spare Safety Inputs Start-Up Sequence Shutdown Sequence Control Configuration Controls Test Before Initial Start-Up Job Data Required Equipment Required Contents Check Machine Tightness Inspect Piping Charge Refrigerant Inspect Wiring Check Starter Oil Charge Check Oil Heater Check Machine Safety Control Settings Configure DIP Switches Check Safety Control Operation Initial Start-Up Preparation Start-Up Calibrate Motor Current Demand Contents Check Machine Operating Condition Trim Refrigerant Charge Instruct the Customer Operator Compressor-Motor Assembly Unishell Purge System Lubrication System Control System Auxiliary Equipment Describe Machine Cycles Review Maintenance Safety Devices and Procedures Check Operator Knowledge Review Operating and Maintenance Instructions Contents Operating Instructions Operator Duties Prepare Machine for Start-Up To Start Machine Check Running System To Stop Machine After Limited Shutdown Extended Shutdown After Extended Shutdown Manual Operation Refrigeration Log Contents Weekly Maintenance Check Lubrication System Check Purge Operation Scheduled Maintenance Inspect Control Center Check Safety and Operating Controls Change Oil and Oil Filter Change Volute Drain Strainer and Refrigerant Filter Compressor Bearing Maintenance Inspect Purge Inspect Refrigerant Flow Chamber Inspect Unishell Tubes Inspect Starting Equipment Ordering Replacement Parts Contents General Maintenance Refrigerant Properties Charging Refrigerant Removing Refrigerant Trimming Refrigerant Charge Refrigerant Loss Air and Water Leaks Guide Vane Linkage Sensor Test Procedure Diffuser Wall Potentiometer Test Procedure General Data Machine Informative Plate System Components Refrigeration Cycle Contents Motor Cooling Cycle Lubrication Cycle Summary Details Purge Cycle Purge Operation Compressor Fits and Clearances Control Troubleshooting Test Points Processor Board Replacement Input/Output Board Replacement Set Point/Display Board Replacement Contents List of Tables Table 1 — Safety Limits and Control Settings Table 2 — Capacity Override Set Points Table 3 — Configuration (DIP) Switch Settings Table 4 — Controls Test Table 5 — Machine Charge Table 6 — Oil Charge Table 7a — Sensor Resistance and Temperature (F) Table 7b — Sensor Resistance and Temperature (C) Table 8 — Purge Operating Switch Settings Table 9 — Diagnostic Codes and Troubleshooting Guide Contents List of Figures Figure 1 — 19DM Machine Components Figure 2 — Control Center Figure 3 — Control Wiring Schematic Figure 4 — Control Sequence Figure 5 — 19DM Leak Test Sequence and Procedures Figure 6 — Purge Valve and Switch Settings Figure 7 — Purge Component Location Figure 8 — Flow Chamber Poppet Valve Detail Figure 9 — Guide Vane Linkage (Closed Position) Figure 10 — Refrigeration and Motor Cooling Cycles Figure 11a — Diffuser Hydraulic Oil Flow Figure 11b— Lubrication Cycle Figure 12 — Purge Cycle Figure 13 — Compressor Fits and Clearances .