Where must the filter and strainers for oil fired boilers be installed during setup?

The installation of filters and strainers for oil-fired boilers should be done upstream from the safety shut-off valve. This positioning is crucial as it ensures that any impurities or debris in the fuel oil are captured before they reach critical components of the boiler system, such as the burner and the safety shut-off valve itself.

By placing the filter and strainer upstream, you protect the burner assembly from potential clogging, which can lead to inefficient operation or even failure of the burner. Furthermore, it contributes to maintaining the safety of the overall system, as any contaminants can be trapped before they have the chance to interfere with the function of safety devices. Ensuring clean fuel supply is vital for the reliability and safety of the boiler operation, making this location for installation essential in the setup procedure.

The other options do not provide the same level of protection. For instance, having the filter downstream from the fuel line or near the burner could expose the burner to contaminants, which may adversely affect performance and safety. Placing the filter at the boiler outlet doesn’t prevent issues before they reach critical components, which is why upstream installation is the best practice.