Combination gas control for use with hot surface/direct spark systems in 24 Vac, gas-fired appliances, with capacities from 30 to 415 cfh. Controls include manual valve, two automatic operators, and pressure regulator. Provide two automatic valves. Solenoid operated first automatic valve opens on thermostat call for heat; closes when call for heat ends. Diaphragm operated second automatic valve opens under control of the regulator; closes if gas or power supply is interrupted. Meet codes requiring dual safety shutoff. Natural to LP and LP to Natural conversion kits available for standard and slow opening gas valves. ON-OFF lighting sequence. All adjustments, wiring connections and pilot outlet are accessible from top of control. Use VR8305 models with S89C,E,F and S87 series 5 and later.