Sprinter 3500 L5-2.7L DSL Turbo (2004)
Expansion Valve: Description and Operation
The "H" valve type thermal expansion valve (TXV) is mounted in the engine compartment between the liquid and suction lines and the evaporator.
The expansion valve is a factory calibrated unit and cannot be adjusted or repaired. If faulty or damaged, the expansion valve must be replaced.
High-pressure, high temperature liquid refrigerant from the liquid line passes through the expansion valve orifice, converting it into a low-pressure,
low-temperature mixture of liquid and gas before it enters the evaporator coil. A thermal sensor in the expansion valve monitors the temperature of the
refrigerant leaving the evaporator coil through the suction line, and adjusts the orifice size at the liquid line to let the proper amount of refrigerant into
the evaporator to meet the vehicle cooling requirements. Controlling the refrigerant flow through the evaporator ensures that none of the refrigerant
leaving the evaporator is still in a liquid state, which could cause damage to the compressor.
The expansion valve is factory calibrated and cannot be adjusted or repaired. If faulty or damaged, the expansion valve must be replaced.
