When is it against EPA regulations to use system-dependent recovery equipment? (A) A) When the appliance contains over 15 pounds of refrigerant. (B) B) When the appliance is leaking. (C) When the compressor of the appliance is operational. (D) D) When the ambient temperature is over 105 degrees \( F \).

The correct answer is: **(A) When the appliance contains over 15 pounds of refrigerant.** ### Explanation: Under the **Environmental Protection Agency (EPA) Section 608** regulations, the amount of refrigerant in an appliance determines the type of recovery equipment that must be used: - **For appliances containing **15 pounds or less** of refrigerant**, technicians can use either **self-contained** or **system-dependent recovery equipment**. - **For appliances containing **more than 15 pounds** of refrigerant**, technicians are **required** to use recovery equipment that is **not system-dependent**, such as self-contained machines or certified recovery systems that meet specific EPA standards. Using system-dependent recovery equipment for appliances with **over 15 pounds** of refrigerant is **against EPA regulations**. This is to ensure proper containment and recovery of larger quantities of refrigerants, which are more impactful on the environment if released. **Other Options:** - **(B) When the appliance is leaking:** While leaking appliances require careful handling to prevent refrigerant release, the specific restriction on using system-dependent recovery equipment relates to the total amount of refrigerant, not the condition of the appliance. - **(C) When the compressor of the appliance is operational:** Operating the compressor isn't directly related to the prohibition of system-dependent recovery equipment based on EPA regulations. - **(D) When the ambient temperature is over 105 degrees \( F \):** Temperature conditions might affect equipment performance but are not the primary factor in EPA regulations regarding the type of recovery equipment used. **References:** - [EPA Section 608 Regulations](https://www.epa.gov/section608) **Answer:** **A) When the appliance contains over 15 pounds of refrigerant.**