Riello 20010004 Oil Primary Control With Integrated 24V TT Connections 530SE/C24V Fits Riello Models R40 F3-F5-F10-F15-F20, BF3, BF5 with manual and hydraulic air shutter 530SE/C24V For all Riello 40 Oil burners F3 to F20 is available as optional a new electronic control box, model 530 SE/C24V, which is equipped with a port for a 24 volt thermostat connection. This new control is completely interchangeable with the previous control box 530 SE/C. The primary control is supplied with a jumper installed in the 24V thermostat connections. The jumper must be removed for applications using the 24V thermostat.