When filling a charging cylinder with a regulated refrigerant, what must happen to the refrigerant vapor that is vented off the top of the cylinder?

• A. It must be released into the atmosphere
• B. It must be recovered
• C. It can be discarded
• D. It can be used again

Answer: (B)

When filling a charging cylinder with a regulated refrigerant, any vapor that is vented off the top must be recovered to comply with environmental regulations. This is crucial because refrigerants can have significant effects on the ozone layer and contribute to climate change if released into the atmosphere. The United States Environmental Protection Agency (EPA) has established regulations under Section 608 of the Clean Air Act, which mandate that refrigerants must be managed carefully to prevent their escape.

Recovering the vented refrigerant means capturing it using a recovery device during the charging process. This ensures that the refrigerant is either reused or properly disposed of in accordance with federal and state regulations. Managing refrigerant in this manner helps to minimize environmental impact, protect public health, and adhere to legal requirements in the HVACR industry.

Releasing refrigerant into the atmosphere or discarding it without proper treatment would violate these important regulations and pose risks to the environment. Thus, recovering the vented vapor is the necessary and responsible practice in handling refrigerants.