When there is a conflict between manufacturer's instructions and CSA B149.1 code, which requirement should prevail?

In situations where there is a conflict between the manufacturer's instructions and the CSA B149.1 code, the principle of adhering to the most stringent requirement is paramount. This approach is grounded in ensuring safety, compliance, and performance standards.

The CSA B149.1 code establishes minimum requirements for the safe operation of gas appliances and installations, emphasizing safety for the public and environment. Manufacturer's instructions are vital for the proper use of specific products; however, they may not always account for the broader safety standards mandated by the code.

Choosing the most stringent requirement means that one should always prioritize the option that offers the highest level of safety and compliance. This ensures that all guidelines are met without compromising on safety, even if it might be more complicated or demanding to implement. Such a choice safeguards both the technician and the end-users by mitigating risks and adhering to a higher standard of safety practice.