HVAC System: Other Ford Focus I рестайлинг

Air Conditioning

The A/C refrigerant system is a clutch cycling orifice tube type. The system components are

1. A/C compressor (19703)
2. A/C clutch assembly
3. A/C condenser core (19712)
4. A/C evaporator core (part of 19850 assembly)
5. suction accumulator (19C836)
6. connecting refrigerant lines

The refrigerant system operation is controlled by the

1. A/C evaporator core orifice (19D990).
2. A/C cycling switch (19E561).
3. A/C compressor pressure relief valve (19D644).
4. A/C pressure cutoff switch (19D594).

The refrigerant system incorporates an A/C compressor controlled by an A/C cycling switch.

The A/C cycling switch senses A/C evaporator core pressure to control A/C compressor operation.

An A/C compressor pressure relief valve is installed in the A/C manifold and tube (19D734) to protect the refrigerant system against excessively high refrigerant pressures.

An A/C evaporator core orifice is installed in the condenser to evaporator tube (19835) to meter the liquid refrigerant into the A/C evaporator core.

Scheme 41

Note. Internal A/C compressor components are not repaired separately. The FS-10 A/C compressor is repaired only as an assembly. The A/C clutch, A/C clutch pulley, A/C clutch field coil and the shaft seal are repairable.

Note. Installation of a new suction accumulator/drier is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator/drier.

The FS-10 A/C compressor (19703) has the following characteristics

1. A ten-cylinder swashplate design utilizing the tangential design mount.
2. A one-piece lip-type seal (installed from the front of the A/C compressor) is used to seal it at the shaft opening in the assembly.
3. Five double-acting pistons operate within the cylinder assembly. The pistons are actuated by a swashplate that changes the rotating action of the shaft to a reciprocating force.
4. Reed-type discharge valves are located between the cylinder assembly and the head at each end of the A/C compressor.
5. The A/C compressor uses PAG oil or equivalent. This oil contains special additives required for the A/C compressor.
6. The A/C compressor oil from vehicles equipped with an FS-10 A/C compressor may have a dark color while maintaining a normal oil viscosity. This is normal for this A/C compressor because carbon from the piston rings will discolor the oil.

Scheme 42

The magnetic A/C clutch has the following characteristics

1. The A/C clutch drives the compressor shaft.
2. When battery positive voltage (B+) is applied to the A/C clutch field coil, the clutch plate and hub assembly is drawn toward the A/C clutch pulley.
3. The magnetic force locks the clutch plate and hub assembly and the A/C clutch pulley together as one unit, causing the compressor shaft to rotate.
4. When B+ is removed from the A/C clutch field coil, springs in the clutch plate and hub assembly move the clutch plate away from the A/C clutch pulley.

A/C Compressor Pressure Relief Valve

An A/C compressor pressure relief valve is incorporated in the compressor A/C manifold and tube to

1. relieve unusually high refrigerant system discharge pressure buildups.
2. prevent damage to the A/C compressor and other system components.
3. avoid total refrigerant loss by closing after the excessive pressure has been relieved.

A/C Condenser Core

Note. Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.

The A/C condenser core has the following characteristics

1. It is an aluminum fin and tube designed heat exchanger located in front of the vehicle radiator (8005).
2. It cools compressed refrigerant gas by allowing air to pass over fins and tubes to extract heat and by condensing gas to liquid refrigerant as it is cooled.

A/C Evaporator Core

Note. The evaporator core is not separately serviceable, it is serviced only with the evaporator core housing assembly.

Note. Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.

The A/C evaporator core is the plate/fin type with a unique refrigerant flow path.

1. A mixture of refrigerant and oil enters the bottom of the A/C evaporator core through the A/C evaporator core inlet tube and then moves out of the A/C evaporator core through the A/C evaporator core outlet tube.
2. This flow pattern accelerates the flow of refrigerant and oil through the A/C evaporator core.

A/C Evaporator Core Orifice

The A/C evaporator core orifice has the following characteristics

1. It is located in the rear condenser to evaporator tube and can be removed through an access fitting.
2. It has filter screens located on the inlet and outlet ends of the tube body.
3. The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the A/C evaporator core orifice.
4. O-ring seals on the A/C evaporator core orifice prevent the high-pressure liquid refrigerant from bypassing the A/C evaporator core orifice.
5. Adjustment or repair cannot be made to the A/C evaporator core orifice assembly. It must be serviced as a unit.

Suction Accumulator

Note. Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.

The suction accumulator is mounted behind the RH corner of the front bumper cover, in front of the RH front wheel well. The inlet tube of the suction accumulator is attached to the evaporator outlet line. The outlet tube attaches to the A/C manifold and tube.

After entering the inlet of the suction accumulator, heavier oil-laden refrigerant contacts an internally mounted dome (which serves as an umbrella) and drips down onto the bottom of the canister.

1. A small diameter oil bleed hole, in the bottom of the vapor return tube, allows the accumulated heavier liquid refrigerant and oil mixture to reenter the compressor suction line at a controlled rate.
2. As the heavier mixture passes through the small diameter liquid bleed hole, it has a second chance to vaporize and recirculate through the A/C compressor without causing compressor damage due to slugging.
3. A fine mesh screened filter fits tightly around the bottom of the vapor return tube to filter out refrigerant system contaminant particles.
4. A desiccant bag is mounted inside the canister to absorb any moisture which may be in the refrigerant system.

A/C Cycling Switch

The A/C cycling switch is mounted on a Schrader-type valve fitting on the evaporator outlet line.

1. A valve depressor, located inside the threaded end of the A/C cycling switch, presses in on the Schrader valve stem.
2. This allows the suction pressure inside the evaporator outlet line to control the operation of the A/C cycling switch.
3. The electrical switch contacts open when the suction pressure drops. The contacts close when the suction pressure rises.
4. The A/C cycling switch will control the A/C evaporator core pressure at a point where the plate/fin surface temperature will be maintained slightly above freezing.
5. This prevents icing of the A/C evaporator core and blockage of air flow.
6. It is not necessary to discharge the refrigerant system to remove the A/C cycling switch.

A/C Pressure Cutoff Switch

The A/C pressure cutoff switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.

1. The A/C pressure cutoff switch is mounted on a Schrader-type valve fitting on the high pressure side of the condenser to evaporator tube.
2. A valve depressor, located inside the threaded end of the A/C pressure cutoff switch, presses on the Schrader valve stem.
3. This allows the A/C pressure cutoff switch to monitor the compressor discharge pressure.
4. It is not necessary to discharge the refrigerant system to remove the A/C pressure cutoff switch.
5. The A/C pressure cutoff switch has two sets of contacts. One electrical contact is normally closed.
6. When the compressor discharge pressure rises, the switch contacts open, disengaging the A/C compressor (19D629). When the pressure drops, the contacts close to allow operation of the A/C compressor.

The switch contains a second set of electrical contacts used for high-speed fan control.

1. When the compressor discharge pressure rises, the contacts close and engage the high-speed fan control. When the pressure drops, the contacts again open and the high speed fan control is disengaged.

Scheme 43

The spring lock coupling is a refrigerant line coupling held together by a garter spring inside a circular cage.

1. When the coupling is connected together, the flared end of the female fitting slips behind the garter spring inside the cage of the male fitting.
2. The garter spring and cage then prevent the flared end of the female fitting from pulling out of the cage.
3. Three O-ring seals are used to seal between the two halves of the A/C condenser core couplings, all other couplings have two O-ring seals.
4. Use only the O-ring seals listed in the Ford Master Parts Catalog for the spring lock coupling.
5. A plastic indicator ring is used on the spring lock couplings of the A/C evaporator core to indicate, during vehicle assembly, that the coupling is connected. Once the coupling is connected, the indicator ring is no longer necessary but will remain captive by the coupling near the cage opening.
6. The indicator ring may also be used during service operations to indicate connection of the coupling.
7. An A/C tube lock coupling clip (19E746) may be used to secure the coupling but is not required.

Scheme 44

The fitting is an integral part of the refrigeration line or component.

1. Special couplings are required for both the high side and low side service gauge ports.
2. The Schrader-type valve core can be serviced if the seal leaks.
3. Always install the A/C charging valve cap (19D702) on the service gauge port valves after repairing the refrigerant system.

Refer to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION .

Material

MATERIAL SPECIFICATIONS

MATERIAL SPECIFICATIONS

MATERIAL SPECIFICATIONS

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1. Recover the refrigerant. For additional information, refer to «REFRIGERANT SYSTEM RECOVERY»(ref-207782-S23448658332005120100000) .
2. Position the vehicle on a hoist with the gear selector in NEUTRAL. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
3. Remove the heat shield.
4. Disconnect the evaporator core orifice connection. Discard the O-ring seal.
5. Inspect the evaporator core orifice for damage.
6. Engage the special tool with the evaporator core orifice.
7. Holding the special tool T-handle stationary, rotate the special tool body to remove the evaporator core orifice.
8. Screw the end of the special tool into the evaporator core orifice.
9. Holding the special tool T-handle stationary, rotate the special tool body to remove the broken evaporator core orifice.

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1. Install new O-ring seals on the evaporator core orifice. Lubricate the new O-ring seals with PAG oil or equivalent.
2. Position the evaporator core orifice in the special tool.
3. Using the special tool, install the evaporator core orifice.
4. Connect the evaporator core orifice access fitting. Install a new O-ring seal lubricated in clean PAG oil.
5. Install the heat shield.
6. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207782-S20604127602005120100000) .

MATERIAL SPECIFICATIONS

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1. Position the vehicle on a hoist with the gear selector in NEUTRAL. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
2. Recover the refrigerant. For additional information, refer to «REFRIGERANT SYSTEM RECOVERY»(ref-207782-S23448658332005120100000) .
3. Disconnect the compressor manifold and tube assembly at the suction accumulator. Discard the O-ring seal.
4. Remove the suction accumulator bracket nut.
5. Remove the suction accumulator bracket bolts.
6. Disconnect the evaporator outlet line fitting at the suction accumulator. Discard the O-ring seals.
7. Remove the suction accumulator.
8. To install, reverse the removal procedure. Install new O-ring seals lubricated in clean PAG oil. Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional information, refer to «REFRIGERANT OIL ADDING»(ref-207782-S12228692662005120100000) .
9. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207782-S20604127602005120100000) .

MATERIAL SPECIFICATIONS

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1. Remove the heat shield.
2. Detach the evaporative emission (EVAP) canister purge valve and position it aside (if equipped).
3. Disconnect the low-pressure cutoff switch electrical connector.
4. Remove the low-pressure cutoff switch. Discard the O-ring seals.
5. To install, reverse the removal procedure. Install a new O-ring seal lubricated in clean PAG oil.

MATERIAL SPECIFICATIONS

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1. Position the vehicle on a hoist with the gear selector in NEUTRAL. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
2. Recover the refrigerant. For additional information, refer to «REFRIGERANT SYSTEM RECOVERY»(ref-207782-S23448658332005120100000) .
3. Remove the lower radiator air deflector.
4. Disconnect the refrigerant lines from the condenser core. Discard the O-ring seals.
5. Remove the four lower radiator support bolts.
6. Remove the condenser core. Unclip the condenser pin. Pull the condenser core to the side and remove.
7. To install, reverse the removal procedure. Install new O-ring seals lubricated in clean PAG oil. Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional information, refer to «REFRIGERANT OIL ADDING»(ref-207782-S12228692662005120100000) .
8. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING»(ref-207782-S20604127602005120100000) .

MATERIAL SPECIFICATIONS

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1. Position the vehicle on a hoist with the gear selector in NEUTRAL. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
2. Disconnect the high-pressure cutoff switch electrical connector.
3. Remove the high-pressure cutoff switch. Discard the O-ring seal.
4. To install, reverse the removal procedure. Install a new O-ring seal lubricated in clean PAG oil.

MATERIAL SPECIFICATIONS

MATERIAL SPECIFICATIONS