Key Codes and Guidelines:
International Fire Code (IFC):
Machinery rooms using A2L refrigerants must meet hazardous location requirements (Class 1, Division 2) from NFPA 70.
Adequate ventilation per ASHRAE 15 is mandatory.
Restrictions include prohibiting open flames and surfaces exceeding 1290°F in machinery rooms, and setting limits on hazardous material storage.
International Building Code (IBC):
Additional limitations may apply based on building occupancy and usage.
Fire safety measures, such as sprinkler systems and structural fire barriers, are required in areas containing A2L refrigerants.
National Electrical Code (NEC):
Regulations for HVAC equipment may include gas detection systems and protective strategies for refrigerant management.
International Mechanical Code (IMC):
HVAC equipment designed for A2L refrigerants must comply with UL/CSA standards and may require infield pressure testing with approved test gases.
ASHRAE 34:
Specifies refrigerant purity standards, including guidelines for refrigerant mixing and reclaimed refrigerants.
Safety and Compliance:
Always follow the manufacturer's instructions and the latest service manuals when handling A2L refrigerants.
Consider additional regional or local code adoption requirements that may affect these international guidelines.
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