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 […]
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 apartment is evacuated in this week’s edition of the Ammonia Week in Review… Ammonia Smell Forces Apartment Building Evacuation – A maintenance worker using ammonia caused the evacuation of an apartment building in the 1600 block of Birch Road Friday, with a hazardous materials team called in to clear the chemical. […keep reading here or here] Ammonia Leak […]
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 […]
A contractor thinks a Canadian ice rink is being too cautious about small ammonia leaks in this week’s edition of the Ammonia Week in Review… Canadian Contractor Questions Rinks’ Cautious Approach to ‘Very Small’ Ammonia Leak – The Alberni Valley Multiplex in Port Alberni, British Columbia, has reopened its two ice rinks following a more than three-week closure. […]
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