What is the job of a suction line accumulator in a heat pump using R-410A?
Refrigeration · EPA 608 Type II. The correct answer, and the reasoning behind it.
Identifying refrigerants, system components and the state of refrigerant in each.
The question
What is the job of a suction line accumulator in a heat pump using R-410A?
- To store high-pressure liquid for the metering device
- To remove moisture from the liquid line
- To raise the discharge pressure
- To trap liquid so it does not reach the compressorCorrect answer
Why “To trap liquid so it does not reach the compressor” is correct
The accumulator sits in the suction line, on the low-pressure side. It catches liquid refrigerant that leaves the evaporator and lets only vapor return, protecting the compressor from liquid slugging.
Source: EPA: Test Topics
Why the other answers are wrong
- To store high-pressure liquid for the metering device — Storing high-pressure liquid is the receiver's job.
- To remove moisture from the liquid line — Removing moisture is the filter-drier's job.
- To raise the discharge pressure — The accumulator does not raise discharge pressure.
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