F 550 2WD Super Duty V10-6.8L VIN Z Bi-Fuel (2001)
Evaporator Core: Description and Operation
Main Climate Control
A/C Evaporator Core
The A/C evaporator core is a plate/fin type with a unique refrigerant flow path.
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A mixture of refrigerant and oil enters the top of the A/C evaporator core through the A/C evaporator core inlet tube and is routed so it flows
through the partitioned first four plate/fin sections.
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The next four plate/fin sections are partitioned to force the refrigerant to flow toward the top of the A/C evaporator core.
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Refrigerant repeats the cycle for two more 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 W-pass flow pattern accelerates the flow of the refrigerant and the oil through the A/C evaporator core.