Why is an inline filter-drier used and where is it placed in the system?

Why is an inline filter-drier used and where is it placed in the system?

• A. It removes moisture and acids from the refrigerant, protecting the metering device and evaporator; placed in the liquid line after the condenser and before the metering device.
• B. It filters air in the cabinet.
• C. It stores extra refrigerant.
• D. It cools the compressor oil.

Answer: (A)

An inline filter-drier removes moisture and acids from the refrigerant, protecting the expensive parts that follow it—especially the metering device and the evaporator—by preventing ice formation in the expansion path and reducing corrosion and oil degradation from acid buildup. It is placed in the liquid line after the condenser and before the metering device so that the refrigerant entering the metering device is dry and clean. If moisture or acids get past the condenser and into the metering device, they can cause freezing, clogging, or damage to the refrigerant oil and internal passages, compromising system performance.

An inline filter-drier removes moisture and acids from the refrigerant, protecting the expensive parts that follow it—especially the metering device and the evaporator—by preventing ice formation in the expansion path and reducing corrosion and oil degradation from acid buildup. It is placed in the liquid line after the condenser and before the metering device so that the refrigerant entering the metering device is dry and clean. If moisture or acids get past the condenser and into the metering device, they can cause freezing, clogging, or damage to the refrigerant oil and internal passages, compromising system performance.