Escape 4WD V6-181 3.0L DOHC VIN 1 Duratec (2003)
Accumulator HVAC: Description and Operation
NOTE: Installation of a new suction accumulator is not necessary 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 to the A/C accumulator bracket. The inlet tube of the suction accumulator is connected to the A/C evaporator outlet
tube. The outlet tube is connected to the A/C manifold and tube assembly.
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.
^
A small diameter oil bleed hole, in the bottom of the vapor return tube, allows the accumulated heavier liquid refrigerant and oil mixture to
re-enter the compressor suction line at a controlled rate.
^
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.
^
A fine mesh screened filter fits tightly around the bottom of the vapor return tube to filter out refrigerant system contaminant particles.
^
A desiccant bag is mounted inside the canister to absorb any moisture which may be in the refrigerant system.
^
A fitting located on the top of the suction accumulator is used to attach the A/C cycling switch. A long-travel Schrader-type valve stem core is
installed in the fitting so that the A/C cycling switch can be removed without discharging the A/C system.
