This prerequisite focuses on the elimination of CFC-based refrigerants that contribute to ozone depletion in HVAC&R equipment. Although fire suppression systems are covered by EAc4, you're not required to consider them for this prerequisite. Doing so in conjunction with EAc4 is a good idea, however.

The credit covers all space-conditioning and refrigeration systems included in the LEED scope of work, including chillers; unitary HVAC equipment (split and packaged); room and window air-conditioners; computer, data center, and telecom room-cooling units; and commercial refrigeration equipment. The prerequisite does not, however, apply to small units and other types of equipment, such as refrigerators and small water coolers that contain less than 0.5 pounds of refrigerant.