Where must a listed lever or wheel thermally operated oil shut off valve be installed?

A listed lever or wheel thermally operated oil shut off valve is specifically designed to provide safety and control in the oil delivery system of an appliance. The correct placement of this valve is crucial to ensure that it functions effectively in case of a malfunction or emergency.

Installing the valve at the burner and the oil supply tank allows for immediate intervention in the flow of oil, thereby preventing potential hazards like leaks or fires should the burner experience overheating or other failures. By being placed close to both the burner and the source of oil, the valve can quickly stop the fuel supply, making it an essential part of the safety protocol for oil-fired heating systems.

Other placements, such as at the appliance exhaust, in the main gas line, or near the thermostat, do not provide the same level of immediate control over the fuel supply and may not effectively address safety issues related to oil appliances. Thus, the installation at the burner and the oil supply tank is the most logical and safety-compliant choice.