Refrigerant Circuit Components Allocation, High And Low Pressure Sides: RESTRICTOR
Restrictor in Front of the Evaporator
The restrictor creates a constriction. This restriction reduces the flow and creates high and low pressure sides in the refrigerant circuit. Before the restrictor the refrigerant which is under a higher pressure is warm. After the restrictor the refrigerant which is under a low pressure is cold. Before the restriction there is a strainer for contaminants and after the restriction there is a strainer, to atomize the refrigerant before it reaches the evaporator.
Arrow -A- on restrictor points to the evaporator.
Replace after each opening of the circuit.
There are different versions, therefore pay attention to the different customer service information sources. Refer to Refrigerant Circuit and to the Parts Information.
Restrictor in Front of the High Voltage Battery Heat Exchanger (Chiller)
The restrictor creates a constriction. This restriction reduces the flow and creates high and low pressure sides in the refrigerant circuit. Before the restrictor the refrigerant which is under a higher pressure is warm. After the restrictor the refrigerant which is under a low pressure is cold.
The illustration shows a refrigerant line -A- with a fixed installed restrictor -B- (without a strainer)
Courtesy of AUDI OF AMERICA, LLCThe diameter of the illustrated variable orifice -B- is approximately 0.7 mm. Depending on the version of the refrigerant line this constriction is either installed fixed in the refrigerant line or only inserted. For the inserted version a strainer for flowing deposits may be installed, which can be blocked by the variable orifice.
Before installing check for debris and if necessary clean or replace.
There are different versions, therefore pay attention to the different customer service information sources. Refer to Refrigerant Circuit and to the Parts Information.