Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
Evaporator Core: Description and Operation
With Air Conditioning
A/C Evaporator Core
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 A/C evaporator core is the plate/fin type with a unique refrigerant flow path.
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A mixture of refrigerant and oil enters the bottom of the A/C evaporator core through the A/C evaporator core inlet tube and is routed so it flows
through the partitioned first three plate/fin sections.
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The next four plate/fin sections are partitioned to force the refrigerant to flow toward the other end of the A/C evaporator core.
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Refrigerant then continues over to the remaining five plate/fin sections and then moves out of the A/C evaporator core through the A/C evaporator
core outlet tube.
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This S-pass flow pattern accelerates the flow of refrigerant and oil through the A/C evaporator core.
