The R7184U1004 is an oboslete universal oil primary control unit replaced by the Honeywell R7284U1004.
The R7184A used with a cad cell flame sensor operates an oil burner and optional oil valve. The primary controls fuel oil senses flame controls ignition spark (either interrupted or intermittent) and notifies a remote alarm circuit when in lockout. The R7184 can be used with both hydronic and forced air systems. When used with hydronic systems line voltage switching Aquastat? Controllers normally provide for the starting and stopping of the combustion sequences. With forced air systems both mechanical and electronic low voltage thermostats control the starting and stopping of the combustion process.