Emerson Climate Technologies 21M51U-843 Universal Two-Stage HSI Integrated 3-Speed PSC Furnace Control Kit REPLACEMENT 50M51-242 Special Discount

The Emerson Climate Technologies 21M51U-843 is a universal furnace control kit that is ideal for replacing White Rodgers 50M51-242 and compatible models. This kit allows for straightforward installation and promotes effective system operation. It comes with a 120 VAC ignitor output, a two-speed inducer output, and a three-speed PSC circulator output. The kit also includes the 21D64-2 Silicon Nitride ignitor and control module.

• Includes ignition control module and universal 120V nitride ignitor kit
• Features fuse protection, historical fault retrieval, and flame current measurement
• Offers delays for heat fan off, fan on for cooling, and auto second stage

Product Highlights

The 21M51U-843 provides extensive control capabilities, with outputs for humidifiers and electronic air cleaners, making it suitable for a range of heating setups.

Product Information

Standard Information

• Brand: Emerson Climate Technologies
• Part Number: 21M51U-843

Technical Specifications

• Ignition Type: Intermittent Hot Surface Pilot
• Stages: 2
• Operating Temperature Range: -40 to 175 degrees F
• Humidity Range: 5% to 93% Relative Humidity (Non-Condensing)
• Width: 5.25 inches
• Height: 8 inches
• Depth: 1.25 inches
• Heating Method: Convection
• Fuel Type: Natural Gas
• Included Components: Furnace control kit