Ignition Controller for NAT-Gas Valve

The Robertshaw 780 Series Pilot Controls feature flame rectification with solid-state logic and flame sensing to provide automatic sequencing that will ensure proper operation of an intermittent pilot ignition device. When the thermostat calls for heat, the 780 series control simultaneously initiates ignition sparking and opens the pilot valve portion of the gas valve. Pilot flame recognition stops ignition sparking and opens the main valve portion of the gas valve. Pilot burner flame is continuously monitored at a synchronous frequency for the duration of the heating cycle. Should the pilot flame fail during the heating cycle, the control will shut off the main valve until the pilot flame is established.

• The Robertshaw 780-845 lockout ignition control provides 90 sec of spark, followed by a six minute time delay (purge) between ignition attempts
• If the pilot flame is not sensed after three tries, the control goes into a one-hour lockout period
• At the end of the lockout period, if the demand for heat is still present, the unit will repeat the three tries for ignition
• Reduces truck stock inventory, saving space and money
• Easy-to-install with complete in-depth installation instructions
• Pilot and main valves draw 1 A at 0.5 power factory
• Combined load at 1.5 A at 0.4 power factory
• 95 percentage relative humidity non-condensing at 104 deg F
• -40 to 175 deg F temperature
• 0.8 sec flame failures re-ignition time
• 0.7 a thermostat anticipator setting
• 24 VAC 20 VA transformer
• 0.7 mA DC at 25 deg C flame sensor current