PROTECTORELAY® OIL BURNER CONTROL - 45 SEC. LOCK OUT TIMING. THIS 4-1/8""L X 2-1/2""W X 4-3/8""H UNIT CONTROLS OIL BURNER OIL VALVE AND THE IGNITION TRANSFORMER IN RESPONSE TO A CALL FOR HEAT. SOLID STATE FLAME SENSING CIRCUIT. LED FOR LOCKOUT INDICATION AND MANUAL TRIP LEVER ON SAFETY SWITCH ASSURES BURNER SHUTDOWN DURING SERVICING. MOUNTS ON A STANDARD 4 X 4 INCH JUNCTION BOX OR DIRECTLY MOUNTS ON BURNER HOUSING.