White-Rodgers 21M51U-843 Universal Two Stage Hot Surface Ignition Control Kit

Product Description

The White-Rodgers 21M51U-843 is a universal two-stage hot surface ignition control kit designed for use with two-stage hot surface ignition systems. This control kit includes the ignition control module and a universal 120V nitride ignitor kit.

• Pushbutton fault history retrieval
• Tri-color furnace status LED
• Auto second stage delay

Product Highlights

The White-Rodgers 21M51U-843 control kit controls both stages of ignition and regulates fan speed for optimal comfort and efficiency. It includes easy-to-follow installation instructions and OEM cross-references for hassle-free setup.

Product Information

Standard Information

• Brand: White-Rodgers
• MPN: 21M51U-843

Technical Specifications

• Control Volts: 24
• Gas Type: LP/NG
• Dimensions: 8 inches height x 5-1/4 inches width x 1-1/4 inches depth
• Lead Length: 15-1/2 inches
• Electrical Ratings: 24V AC
• Retries: 2
• Igniter Warm-Up Time: 17 seconds
• Prepurge Time: 15 seconds
• Includes: Control Module, Universal Nitride Ignitor