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Climate Control System: Maintenance Lincoln LS I рестайлинг

A/c Compressor 2 illustrations ~818 words

Air Conditioning (A/C) System Flushing Procedure

WARNINGUse extreme care and observe all safety and service precautions related to the use of refrigerants.
WARNINGDue to refrigerant hazards, always wear safety goggles and non-penetrable gloves when working on or flushing A/C systems.
CAUTIONAn A/C refrigerant analyzer must be used before the recovery of any vehicle's A/C refrigerant. Failure to do so puts the shop's bulk refrigerant at risk of contamination. If the vehicle's A/C refrigerant is contaminated, refer the customer to the service facility that carried out the last A/C service. If the customer wishes to pay the additional cost, use the A/C recovery equipment that is designated for recovering contaminated A/C refrigerant. All contaminated A/C refrigerant must be disposed of as hazardous waste. For all equipment, follow the equipment manufacturer's procedures and instructions.
CAUTIONSuction accumulator, muffler, hoses, and fixed orifice tube should be removed when flushing the A/C system. Internal plumbing of these devices makes it impossible to correctly remove any residual-flushing agent. Except for the hoses, these components are typically discarded after A/C system contamination. Hoses without mufflers can normally be reused unless they are clogged with foreign material. The 3.785 liters (1 gallon) of A/C Systems Flushing Solvent F4AZ-19579-A and FL1-A filter used in A/C Flush and Purge Machine 219-00022 are intended for use on one vehicle only. They may be used to flush both the A/C condenser core and the A/C evaporator core on an individual vehicle, but under no circumstances should they be used on more than one vehicle.
  1. Ford Motor Company has approved a procedure to provide technicians with a non-CFC method of flushing contaminated A/C system heat exchangers, A/C evaporator core, and A/C condenser core. The procedure allows the specific components to be cleaned and flushed while installed in their normal in-vehicle location. The types of contamination flushed include particle matter that results from A/C compressor or desiccant failure within the suction accumulator and gummy residue that can form when refrigerant oil is overheated during A/C compressor seizure. The flushing process is a two-step procedure that involves the use of an A/C Flush and Purge Machine 219-00022 to: Circulate the flushing solvent through the heat exchanger in the reverse direction of normal refrigerant flow (back-flushing). Particulate matter picked up during flushing is filtered from the returning solvent before the solvent is returned to the reservoir for continued circulation. Remove the flushing solvent from the heat exchanger. In this step of the procedure, pressurized air 621-862 kPa (90-125 psi) is used to push and evaporate any remaining flush solvent from the heat exchanger.
  2. Discharge the A/C system. Observe all safety precautions. For additional information, refer to the procedure.
  3. Disconnect the refrigerant lines from the heat exchanger(s) to be flushed.
  4. Connect the A/C Flush and Purge Machine 219-00022 and A/C Flush and Purge Fitting Kit 219-00024 to the heat exchanger to be flushed. Do not flush through the evaporator core orifice, mufflers or hoses. Internal plumbing and material make-up of these components make it impossible to correctly remove foreign material or residual flushing solvent.
  5. Use 3.785 liters (one gallon) of A/C Systems Flushing Solvent part number F4AZ-19579-A to flush the heat exchanger for a minimum of 15 minutes. The flush solvent may be used for one or both heat exchangers in the A/C system. However, the flush solvent is intended for one vehicle only. The filter used on the flushing unit is also intended for use on one vehicle only.
  6. Flush the component for a minimum of 15 minutes.
  7. Apply 621-862 kPa (90-125 psi) pressurized air to the component for a minimum of 30 minutes. The 30-minute purge time is required to force and evaporate all residual solvent from the A/C system component. Failure to successfully remove all residual solvent within the component can result in system damage when reconnected and operated. Dispose of the used flush solvent and filter in accordance with local, state and federal emissions.
  8. Install a new evaporator core orifice in any vehicle being serviced for A/C compressor or desiccant failure.
  9. Install new refrigerant hoses if clogged with foreign material.
  10. Reconnect the heat exchanger being serviced.
  11. Add additional refrigerant oil as required. For additional information, refer to the procedure.
  12. Evacuate, leak test and charge the A/C system. For additional information, refer to the procedure.
  13. Check the system for normal operation.

Scheme 43

Scheme 43: Special Tool(s)
Scheme 43: Special Tool(s)

Scheme 44

Scheme 44: Refrigerant System Filtering After A/C Component Replacement
Scheme 44: Refrigerant System Filtering After A/C Component Replacement
  1. Install the new A/C compressor. For additional information, refer to «AIR CONDITIONING (A/C) COMPRESSOR - 3.0L (4V)»(ref-207561-S34153636072005113000000) or «AIR CONDITIONING (A/C) COMPRESSOR - 3.9L»(ref-207561-S36221291712005113000000) .
  2. Install the new receiver drier. For additional information, refer to «RECEIVER DRIER»(ref-207561-S01497177412005113000000) .
  3. Install the new thermostatic expansion valve. For additional information, refer to «THERMOSTATIC EXPANSION VALVE»(ref-207561-S16394289412005113000000) .
  4. Orient the filter inlet toward the A/C condenser core.
  5. Temporarily install the pancake filter between the A/C condenser core and the receiver/drier manifold and tube assembly. Use flexible refrigerant hose of 17,238 kPa (2,500 psi) burst rating. Make the connections using the R-12/R-134a Air Conditioning Test Fitting Set.
  6. Correctly oil match the system. For additional information, refer to «REFRIGERANT OIL ADDING»(ref-207561-S33012050602005113000000) .
  7. Evacuate and charge the system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207561-S32152738792005113000000) .
  8. Check all refrigerant system hoses, lines and the position of the newly installed filters to be sure they do not interfere with other engine compartment components. If necessary, use tie straps to make adjustments.
  9. Provide adequate airflow to the front of the vehicle (with a fan, if necessary). Select A/C operation and set the blower motor speed to maximum. Start the engine and let it idle briefly. Make sure the A/C system is operating correctly.
  10. Gradually bring the engine up to 1,200 RPM by running it at lower rpms for short periods (first at 800 RPM, then at 1,000 RPM). Set the engine at 1,200 RPM and run it for one hour with the A/C system operating.
  11. Stop the engine.
  12. Recover the refrigerant from the system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207561-S32152738792005113000000) .
  13. Remove the fittings, flexible hoses and pancake filter from between the A/C condenser core and the receiver drier manifold and tube assembly.
  14. Discard the pancake filter. It can be used one time only.
  15. Reconnect the receiver drier manifold and tube assembly to the A/C condenser core.
  16. Evacuate and charge the system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207561-S32152738792005113000000) .

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