Item description Shop for White Rodgers Furnace Board Control Kits from McCombs Supply Co. $5.00 fast shipping. Trusted supplier since 1953.
White Rodgers Furnace Board Part number 21V51U-843.This is a Universal Two-Stage HSI Integrated Variable Speed (ECM) Circulator Furnace Control Kit.
16-pin variable speed circulator output for ECM (Electronically Commutated Motor), dipswitch selectable for OEM applications two-speed inducer output,2-stage gas valve output Pushbutton fault history retrieval. 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). 120 VAC humidifier output/120 VAC electronic air cleaner output.
120 VAC Ignitor Output 120 VAC Two-Speed Inducer Output 120 VAC Humidifier Output 120 VAC Electronic Air Cleaner Output 2-Stage Gas Valve Output 16-Pin Variable Speed Circulator Output OEM Application Dipswitch Selectable Fuse Protection 3 Amp Furnace Status LED Tri-Color (Green, Red and Amber) CFM LED (Green) 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, W, W2, R, G, C, O, BK/DS/Dehum Terminals Pressure Switch Inputs and Monitoring Flash Microprocessor with Non-Volatile Memory Flame Current Measurement Points
All White-Rodgers 50V51-XXXsand 50V61-XXXs Two-Stage HSI Systemswith 80V or 120V Ignitor.
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