Final answer:
The easiest way to determine the type of refrigerant a packaged rooftop unit uses is to look at the unit name plate. Alternatively, using a service gauge set and a refrigerant card can also help identify the refrigerant type.
Step-by-step explanation:
The easiest way to check the type of refrigerant a 60 ton packaged rooftop unit uses is to look at the unit name plate. The unit name plate typically includes important information, such as the type of refrigerant used, along with other specifications and ratings.
Using the service gauge set and a refrigerant card can also help determine the type of refrigerant in the unit. The service gauge set allows you to measure the pressure of the refrigerant, which can give you a clue about its type. The refrigerant card provides a guide that helps match the pressure readings with the corresponding refrigerant type.
Asking the owner may not always yield accurate information, as the owner may not be knowledgeable about the specific type of refrigerant. Determining the condenser size alone does not provide reliable information about the type of refrigerant.