Which of the following statements regarding pump down or removal of refrigeration is false?

The statement about the requirement of bringing the system into high-pressure to evaporate the refrigerant from the section being dismantled is false. In refrigeration systems, the process of removing refrigerant typically involves creating a vacuum or using a recovery machine that operates at a low-pressure environment. The goal is to allow refrigerant to flow out of the system without needing to increase the system pressure artificially. This method effectively captures the refrigerant in a controlled manner, ensuring that it is safely recovered and preventing any environmental harm.

The other statements provide accurate information about the refrigeration removal process. Using a low-pressure vacuum is indeed a common method for removing refrigerants as it allows for the safe extraction of refrigerant vapor. Additionally, refrigerant removal processes do require the system to be shut down to ensure safety and prevent damage to the equipment. Furthermore, high-pressure is not a necessity for all systems; it is more relevant to specific smaller systems where pressure might play a different role in the refrigerant removal process. Overall, understanding these aspects is critical when dealing with refrigeration systems and ensuring both efficiency and safety during maintenance or dismantling operations.