Which code provides guidelines for the safe design, construction, installation, and operation of refrigeration systems?

The correct choice reflects the guidelines provided by CSA B52, which specifically addresses the safe design, construction, installation, and operation of refrigeration systems. CSA B52 covers a range of topics including safety requirements, system configurations, and specific practices for ensuring that refrigeration systems operate efficiently while minimizing risks to both people and the environment. The standard is integral to establishing safety protocols in the refrigeration industry, emphasizing the importance of adhering to regulated practices to prevent accidents and ensure operational efficiency.

In contrast, other options discuss different aspects of safety and standards. CSA B51 focuses on the design and construction of boilers and pressure vessels, which, while important, does not pertain directly to refrigeration systems. ANSI/ASHRAE standards provide guidelines for various aspects of heating, ventilation, and air conditioning but do not exclusively focus on refrigeration system safety like CSA B52 does. ISO 14001 pertains to environmental management systems and is aimed at improving environmental performance but does not specifically concentrate on the nuances of refrigeration systems. Hence, CSA B52 is the most relevant standard for the safe handling of refrigeration systems.