When servicing a unit that has a receiver/storage tank, place refrigerant in the ______.

• A. Line
• B. Tank
• C. Storage
• D. Receiver

Answer: (D)

When a system has a receiver/storage tank, refrigerant is added into the receiver. The receiver is the liquid storage vessel on the high side that holds liquid refrigerant after the condenser and before the metering device. Filling the receiver ensures there is a proper liquid supply available to feed the metering device and keeps liquid separated from vapor, which helps prevent compressor damage and maintains an accurate charge. Charging directly into lines or a generic storage tank wouldn’t place refrigerant where the system is designed to receive it, and could lead to improper charging or safety issues.