Delonghi Oil Heater Wiring Diagram. Posted by mari on may 27, regarding the wiring on my ancient vulcan oil heater i have only just received a wiring diagram (dated january ), which i am just about to. Pelonis oil heaters are known for their high quality and durability. Delonghi 2507L Parts HVACs from www.appliancefactoryparts.com Diagram […]