The recent release of ANSI/IIAR 2-2014 has provided the ammonia refrigeration industry with much needed direction on the topic of ammonia detection in a refrigerated facility. Prior to the release of this document, IIAR 2 only addressed ammonia detection within the context of a machinery room and left the requirements of “other than machinery rooms” […]
It has long been required that access be considered when designing and installing an ammonia refrigeration system. In fact, we wrote about this topic in some detail back in 2013. However, with the recent release of ANSI/IIAR 2-2014, it is appropriate to revisit all of the relevant access requirements contained within this important RAGAGEP document. […]
ANSI/IIAR 2-2014 §15.6 outlines the requirements for providing Hydrostatic Overpressure Protection. In situations where thermal hydrostatic expansion of trapped liquid ammonia could occur, hydrostatic protection must be provided. Per ANSI/IIAR 2-2014 §15.6.1, Protection against overpressure due to thermal hydrostatic expansion of trapped liquid ammonia shall be provided for equipment and piping sections that can be […]
Remote Emergency Stop Switches are an integral part of a compliant ammonia refrigeration machinery room. ANSI/IIAR 2-2014 §6.12.1 requires that: “A clearly identified emergency shut-off switch with a tamper-resistant cover shall be located outside and adjacent to the designated principal machinery room door. The switch shall provide off-only control of refrigerant compressors, refrigerant pumps, and normally […]
In order to properly identify and control hazards in an ammonia refrigeration system, it is necessary to understand how a refrigeration system operates. Without understanding the basic principles, one is likely to be confused, slow to respond, or even incorrect when identifying unsafe conditions. What is refrigeration? Refrigeration is a process wherein the pressure of […]
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