Some oil burners are available with combination oil and gas firing accessories that make it possible to use either of these fuels in the same burner. This is particularly advantageous in areas where lowcost gas is sometimes available.
The combination gas and oil burner illustrated in Figure 1-21 contains independent ignition and control systems for gas or oil. One convenience built into these combination burners is that the oil burner components and parts are standard and require only conventional service procedures. The safety features include a standard cadmium sulfide detection cell and primary relay control.
