We’ve written about NFPA 704 placards on ammonia refrigeration systems in the past, but it seemed timely to provide an update since ANSI/IIAR 2-2021 was recently published and includes a noteworthy change in the minimum requirements. What’s the Same? The 2021 version of Standard 2 still requires that an NFPA 704 placard be affixed to […]
What signage is required for an ammonia refrigeration machinery room? This question is often made to be more complicated than necessary. This blog post will clarify the three (3) categories of signage required for machinery rooms, as well as give examples for best practices. Machinery Room Door According to Chapter 6 of ANSI/IIAR 2-2014 [1], […]
Question: What is the correct NFPA 704 placard for an ammonia refrigeration system? Answer: This question has caused enormous confusion in the ammonia refrigeration industry, so I will attempt to bring some clarity to the issue. ANSI/IIAR 2-2008 Addendum B §13.1.10.4 requires that “Refrigerating systems shall be provided with approved informative signs, emergency signs, charts and […]
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