Where must a thermally shutoff valve be installed when inside tanks are used and the oil supply tank is in a separate room?

The correct location for the installation of a thermally shutoff valve, when inside tanks are used and the oil supply tank is in a separate room, is where the line enters the room where the appliance is located. This placement is crucial for safety and operational efficiency.

By positioning the thermally shutoff valve at this location, it ensures that if a dangerous condition develops, such as excessive heat from a malfunctioning burner, the valve can effectively shut off the fuel supply to the burner. This location serves as a critical safety point where any potential hazard can be swiftly addressed, preventing fuel from reaching the burner area and mitigating the risk of a fire or an explosion.

In other placements, such as at the oil supply tank or near the burner, the valve would not provide the same level of immediate intervention in the case of an emergency, as it would be either too far from the heat source or too close to where the fuel is being burned. Installing the valve where the line enters the appliance room allows for a more proactive approach to managing the risks associated with oil-fueled appliances.