Economizer Heat Exchanger Replacement

Argomento collegato: Manutenzione del sistema di refrigerazione

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.

    Importante 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 Prova di tenuta nel sistema di refrigerazione.).

  5. If no leaks are found, recover the leak test gas (Refer to Prova di tenuta nel sistema di refrigerazione.).

  6. Evacuate the low side (Refer to Svuotamento e pulizia del sistema di refrigerazione).

  7. Recharge the unit with R-404A/R-452A (Refer to Ricarica del sistema con refrigerante).

  8. Recharge the unit with R-134a/R-513A (Refer to Ricarica del sistema con refrigerante).

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