Components

CENTRIFUGAL LIQUID CHILLER

COMPONENT

FUNCTION

MAINTENANCE

CONTROL CENTER
  • Provides wiring connection point, safety interlocks, controls, and capacity control for compressor operation.
    		•
  • Sequence test all controls.
  • Calibrate and clean controls and safety devices.
  • Inspect and clean electrical contacts.
  • Check and set point of controls and limits.

    • MOTOR
  • Provides energy for compressor operation.
    		•
  • Lubricate motor bearings.
  • Check motor insulation resistance.
  • Check condition and alignment of drive section.
  • Measure vibration.
  • Examine motor mount resiliency.

    • MOTOR STARTER
  • Controls on/off operation of motor.
    		•
  • Check operating current, voltage and heater size.
  • Inspect starter coils and contacts.

    • TRANSMISSION
  • Provides mechanical link between motor and impeller.
    		•
  • Check for proper lubrication

    • COMPRESSOR
  • Prepares refrigerant to be condensed and reused at the evaporator.
    		•
  • Check refrigerant charge.
  • Check for refrigerant and oil leaks.
  • Test for proper operation and efficiency.
  • Observe bearing and operating surface temps.
  • Check oil heater operation.
  • Check oil level and condition.
  • Perform acid test.
  • Measure vibration on main bearings.

    • CONDENSER
  • Transfers heat from refrigerant to condenser water.
    		•
  • Inspect and clean tubes as required.
  • Inspect for corrosion, clean and paint as required.

    • CONDENSER WATER CONNECTIONS
  • Provides connections for condenser water supply and return.
    		•
  • Inspect and check for leaks.
  • Repair or tighten as required.

    • CHILLED WATER CONNECTIONS
  • Provides connections for chilled water supply and return.
    		•
  • Inspect and check for leaks.
  • Repair or tighten as required.

    • VANES
  • Regulates the amount of refrigerant vapor entering compressor.
    		•
  • Repair as required.
  • Lubricate vane linkages.
  • Check vane control for proper operation.

    • PURGE UNIT
  • Removes non condensables and water vapor from refrigerant system.
    		•
  • Lubricate motor.
  • Clean purge drum.
  • Change purge unit oil.
  • Check drive belt and adjust tension.

    • VIBRATION ISOLATORS
  • Reduces noise transmission of unit to building structure.
    		•
  • Check for security and resiliency.

    • EVAPORATOR
  • Provides for heat transfer from chilled water to refrigerant.
    		•
  • Inspect rupture disc for leaks.
  • Inspect and clean tubes as required.

    • FLOW CONTROL
  • Regulates refrigerant flow from the condenser to the evaporator.
    		•
  • Check float control operation as required.

    • LUBRICATION PUMP
  • Supplies oil to critical bearings in compressor.
    		•
  • Inspect and check for proper operation.
  • Change oil as required.