Valeooscope - Air Conditioning System Thermal comfort loop

Option 3 Cartridge drier

The IRD ‘Integrated Receiver Drier’. Both option 2 and option 3 integrate the receiver drier in the condenser refrigerant path. The IRD is not just about integration: it allows reaching a much higher level of condensation in the condenser in the long run despite refrigerant level fluctuations.

What you need to know to become N°1. Recommendations on the receiver drier. The receiver drier must be replaced whe- never the air conditioning loop is opened. For example, after an accident in which the condenser was damaged, the receiver drier must be replaced, or the desiccator will no longer retain the humidity in the circuit. It will become saturated with hu- midity. Due to its very role, the receiver drier is hygroscopic. Therefore it is essential to obey the basic rules when replacing it on a vehicle or the new receiver drier may be damaged. Receiver driers are fitted with compulsory plugs that must be removed as late as pos- sible, i.e. just before they are installed. Warning! If the receiver drier is not replaced, the operation of the loop will deteriorate and the risk of a breakdown will occur (bloc- ked expansion valve, impurities in the cir- cuit, etc.). In any case, the receiver drier must be ins- talled in the loop at the very last moment, just before the vacuum procedure.

Example of an application in the Valeo Air Condi- tioning catalogue. This example shows that, when the condenser 818004 is replaced, the receiver drier 509593 is supplied with the condenser. It is mounted on the condenser in production. This option is shown in the Information column (I), which contains the pictogram of the drier cartridge.

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