The Robertshaw 780 series hot surface controls are designed for use on gas fired systems. The system acts on a demand for heat by a switch or thermostat to supply power to the ignition control. On non pre-purge models, the ignitor will be energized immediately and remain on for either of two optional selected ignitor heat-up times: approximately 17 or 34 sec. For models with the prepurge option, there is a time delay equal to the heat-up time selected before the ignitor is energized. At the end of the ignitor heat-up time, the gas valve is opened supplying gas to the main burner. After several seconds, the ignitor is turned off and the sensor is energized. As long as flame is sensed, the system continues to operate.

Robertshaw® Control Board, Series: 780, 120 VAC, 1.5 A, 50/60 Hz, Time Delay: 34 sec Pre-Purge, Igniter Warm-Up, 6 sec Valve Trial, -40 to 176 deg F

• Reduces truck stock inventory, saving space and money
• Easy-to-install with complete in-depth installation instructions
• Molded-in terminal barriers between terminals
• Mounting screw provides a positive ground connection
• Small compact size provides no hassle installation
• Main valve current is 1.5 A at 24 VAC
• Local flame sense method
• Local sensor type
• 0.1 A thermostat anticipator setting, 5 A maximum igniter current
• Three ignition attempts