Is it acceptable to test a high discharge pressure cutout (HPCO) by lowering the setpoint? Maybe. ANSI/IIAR 6-2019 §6.1.1 prescribes the allowable methods for testing a compressor HPCO which is required annually per Table 6.1. Depending on the type of pressure limiting device being used, allowable methods differ. Electromechanical Switch Electromechanical switches are widely used […]
A refrigeration contractor dies after an ammonia leak in this week’s edition of the Ammonia Week in Review… Investigators Identify Victim in Deadly Ammonia Leak at Iredell County Warehouse – Officials said a subcontractor was killed and another worker was hurt after an exposure to anhydrous ammonia. […keep reading] The Tables! (IIAR 6, Part 10) – Chapters 6-15 of […]
Chapters 6-15 of ANSI/IIAR 6-2019 primarily consist of tables which summarize the minimum frequencies for the required ITM tasks. Each chapter addresses a different category of equipment: 6 – Compressors 7 – Refrigerant Pumps 8 – Condensers 9 – Evaporators 10 – Pressure Vessels 11 – Piping 12 – Safety Systems 13 – Overpressure Protection […]
An ammonia trailer accident proves fatal in Mexico in this week’s edition of the Ammonia Week in Review… 5 People Killed by Ammonia Poisoning after Tanker Truck Accident – The five were traveling aboard a bus on the Siglo XXI highway when it was trapped in a toxic cloud of ammonia released when the tanker, a double tractor-trailer, […]
Who is allowed to perform inspections on an ammonia refrigeration system? ANSI/IIAR 6-2019 §5.4.2 succinctly states that “Equipment inspections shall be performed by a qualified inspector(s)“. According to the definition in Chapter 2, a Qualified Inspector is “A person who is experienced with closed-circuit ammonia refrigeration systems, has knowledge of the process, and has demonstrated […]
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