Integrate Furnace Fan Control

Description White-Rodgers, 21M51U-843, Control Switch, Furnace Controls, Part, Hot Surface Igniter, Universal Two-stage HSI Integrated 3-Speed (PSC) Circulator Furnace Control Kit White-Rodgers furnace controls include the 21M51U-843 universal two-stage his integrated furnace control kit which includes the module and igniter kit, replacing White-Rodgers 50M51-242 and 50M61-xxx's two-stage his systems with 80 V or 120 V igniters. Features: 120 VAC Igniter Output 120 VAC Two-Speed Inducer Output 120 VAC Humidifier Output 120 VAC Electronic Air Cleaner Output 120 VAC 3-Speed PSC Circulator Output 2-Stage Gas Valve Output Fuse Protection 3 Amp Furnace Status LED Tri-Color (Green, Red and Amber) Heat Fan OFF Delay (Dipswitch Selectable) Fan ON Delay for Cooling Auto Second Stage Delay (Dipswitch Selectable Mode) Historical fault retrieval by pushbutton YLO, Y, W1, W2, R, G, C, TWIN terminals Pressure switch inputs and monitoring Flash microprocessor with non-volatile memory Flame current measurement points Replaces: White-Rodgers 50M51-242 and all 50M61-xxxs Two-Stage HSI systems. Easy Installation Instructions and OEM Cross-Reference Specifications: Operating Temperature Range: -40 to 175F (-40 to 80C) Humidity Range: 5% to 93% relative humidity (non-condensing) Gases Approved: Natural, Manufactured, Mixed, Liquefied Petroleum and LP Gas/Air Mixtures are all approved for use Dimensions: 5-1/4W x 8H x 1-1/4D White-Rodgers, a recognized leader in climate control solutions, celebrates 75 years of business in 2012. Experience, integrity and customer service are still the tenets that mark this great company. From the humble beginnings of two engineers collaborating to solve the control problem of the day, to being the answer for your climate control needs, White-Rodgers is the respected name among industry professional.