White-Rodgers 21D83M-843 Ignition Furnace Control Kit

The Ignition Furnace Control Kit delivers reliable ignition control for gas-fired heating systems. The White-Rodgers 21D83M-843 is a Ignition Furnace Control Kit offering 1-stage, 3-speed operation with support for natural, manufactured, mixed, LPG and propane fuels, featuring a hot surface ignition and integrated flame sense for fast, safe starts.

Designed for gas-fired non-integrated forced-air furnaces, boilers, and cooking appliances, this kit runs on 25V AC and provides robust switching through the gas valve relay, inducer relay, and circulator relay to ensure dependable starts and safe operation.

• Type: 1-Stage, 3-Speed
• Fuel types: Natural, Manufactured, Mixed, LPG and Propane
• Ignition: Hot Surface with Remote Flame Sense
• Sequence/Prepurge: 4-Trial Ignition; 15-second Prepurge
• Electrical: 25V AC control; Gas valve relay 1.5A at 25V AC
• Relays & Loads: Inducer 2.2 FLA–3.5 LRA; Circulator 14.5 FLA–25 LRA; Humidifier load 1A
• Environment: -40 to 175°F; 5–93% RH; Auto-Reset 60 minutes
• Kit contents: 50M51-843 Ignition Control Module; 21D64-2 Hot Rod Universal Igniter Kit