Filter dryer is a necessary filtering part in refrigerating system．And to absorb residule moisture and filter dirt of easy blocking system．So that it can keep system in normal running status．

　　Because there are sieve net，deslccatlve and filter net，wben media in system flow filter dryer，sieve net and filter net can filter small object such as：metal chipping，slag，desiccative can absorb moisture in flow media，so that they can prevent all kind of pafts in system from damaging．

　　 After take off the seal cap of input and output，it should be installed in right now．It can’t be explore the air long time prevent the desiccative absorb the moisture，and then re duce the absorption performance．
　　 The flow media direction must be same as the mark in part．
　　 The desiccative must be compatible with refrigerant．