EPA Section 608 Universal Certification ExamCoreEasy
A technician is installing a new residential split system that uses R-410A. Which of the following components should be installed in the liquid line to protect the system from moisture and contaminants after installation or during major repairs?
- AFilter Drier
- BService Valve
- CSight Glass
- DAccumulator
Show answer & explanationAnswer & explanation
Correct answer: A. Filter Drier
A filter drier is specifically designed to absorb moisture and filter out solid contaminants from the refrigerant in the liquid line, protecting the system's sensitive components like the expansion valve and compressor.
Why the other options are wrong
- B. A service valve is used for connecting gauges and recovery equipment, not for filtration or moisture removal.
- C. A sight glass allows visual inspection of refrigerant flow and moisture content but does not remove contaminants.
- D. An accumulator is installed in the suction line to prevent liquid refrigerant from returning to the compressor, not for moisture/contaminant removal.
Filter Drier Function
A filter drier is a crucial component in a refrigeration system, typically located in the liquid line, designed to remove moisture and solid contaminants from the refrigerant.
- Absorbs moisture using desiccants.
- Filters out solid particles (e.g., metal shavings, dirt).
- Protects compressor and expansion valve from damage.
- Should be replaced during major repairs or system contamination.
Memory trick: Filter drier: the system's clean-up crew in the liquid flow.