Economizer Heat Exchanger Replacement

Parent topic: Refrigeration Maintenance

Removal

  1. Recover the refrigerant charge from the unit (Refer to Recovering Refrigerant from System).

  2. Unsolder the two liquid and two suction line connections.

  3. Unbolt the economizer heat exchanger from the mounting bracket.

  4. Lift the heat exchanger assembly from the unit.

Installation

  1. Bolt the economizer heat exchanger to the mounting bracket in the condenser section.

  2. Clean the two liquid and two suction lines for soldering.

    Important Thermo King strongly recommends that dry nitrogen be used to purge the system during any solder operations (Refer to Using Pressurized Nitrogen).

  3. Solder the liquid and suction lines to the economizer heat exchanger.

  4. Pressurize the low side and check for leaks (Refer to Leak Testing Refrigeration System).

  5. If no leaks are found, recover the leak test gas (Refer to Leak Testing Refrigeration System).

  6. Evacuate the low side (Refer to Evacuation and Cleanup of Refrigeration System).

  7. Recharge the unit with R-404A/R-452A (Refer to Charging System with Refrigerant).

  8. Perform a controller pretrip test to verify system operation.