What must hot water and steam boilers have before being operationally tested?

Before a hot water or steam boiler can be operationally tested, it must have safety controls set. Safety controls are critical components that ensure the safe operation of the boiler by preventing conditions that could lead to overheating, pressure build-up, or other potentially dangerous situations. These controls include, but are not limited to, pressure relief valves, temperature limits, and safety interlocks.

Setting these safety controls is a fundamental step in the commissioning process, as they help guarantee that the system will function correctly and safely under operational conditions. Ensuring that these controls are properly adjusted and functioning can prevent accidents and mishaps during the testing phase and throughout the boiler's operational life.

While installation guidelines, operational permits, and manufacturer's instructions are important aspects of boiler setup and compliance, they do not directly address the immediate safety mechanisms that must be in place before testing begins. Therefore, having the safety controls set is the vital requirement for proceeding with operational tests.