AEC ACOA Series Air-Cooled Central Chillers - Manual (Page 6)

Table of Contents
6
Electrical Devices ................................................... 41
6-1 Control Circuit Power Switch - S1
6-2 Compressor Switch - S2, S3, S4, S5
6-3
Flow Switch - FLS
6-4 Chilled Water Pump Interlock - CWP
6-5 High Pressure Safety Switch - 1PS
6-6 Pumpdown Switch - 4PS
6-7 Compressor Oil Failure Switch - 3PS
6-8 Low Pressure Switch - 9PS, 5TR, 3TAS
6-9 Fan Pressure Switch - 10PS, 11PS
6-10 Compressor Cycle Timer - 1TR
6-11 Timer - 4TR
6-12 Contactors - M
6-13 Relays - CR
6-14 Crankcase Heater - HTR
6-15 Operating Thermostat - 4TAS
6-16 Liquid Line Solenoid Valve - SOL
6-17 Unloading Solenoid Valve
6-18 Motor Overload Protection - 1TAS
6-19 Undervoltage Relay - UVR
6-20 Fan Speed Control - SCR
7
Maintenance ............................................................ 45
7-1 Making Periodic Inspections
7-2 Making Monthly Inspections
7-3 Maintaining the Evaporator and Condenser
7-4 Cleaning the Evaporator
7-5 Cleaning Air Cooled Condensers
7-6 Protections Against Electrical Malfunctions
7-7 Maintaining Compressors
7-8 The Refrigerant Charge
7-9 Preventive Maintenance Service
8
Troubleshooting ..................................................... 49
ACOA Series Air-Cooled Central Chillers
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