Which type of A/C systems use an accumulator dryer?

Prepare for the HVAC 403A Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which type of A/C systems use an accumulator dryer?

An accumulator dryer is placed on the low‑pressure side of an A/C system to separate liquid refrigerant from the vapor and to absorb moisture with desiccant. This protects the compressor by preventing liquid slugging and oil dilution, especially when the metering device feeds refrigerant into the evaporator without actively maintaining a high level of superheat. In systems that use an orifice-type metering device—whether fixed (CCOT) or variable (VDOT)—there’s a higher risk that liquid refrigerant could reach the compressor, so an accumulator is used to trap that liquid and keep only vapor entering the compressor. Therefore, both CCOT and VDOT configurations use an accumulator dryer.

An accumulator dryer is placed on the low‑pressure side of an A/C system to separate liquid refrigerant from the vapor and to absorb moisture with desiccant. This protects the compressor by preventing liquid slugging and oil dilution, especially when the metering device feeds refrigerant into the evaporator without actively maintaining a high level of superheat. In systems that use an orifice-type metering device—whether fixed (CCOT) or variable (VDOT)—there’s a higher risk that liquid refrigerant could reach the compressor, so an accumulator is used to trap that liquid and keep only vapor entering the compressor. Therefore, both CCOT and VDOT configurations use an accumulator dryer.

More practice questions