White-Rodgers 21V51U-843 Universal Two-Stage HSI Circulator Furnace Control Kit With Nitride Ignitor

White-Rodgers Universal Two-Stage HSI Circ. Furnace Control Kit. Includes Universal Nitride Ignitor Kit – 21D64-2. Variable Speed (ECM). Replaces All White-Rodgers 50V51-XXX's & 50V61-XXX's Two-Stage HSI Systems with 80V or 120V Ignitors.

Easy-To-Install Kit includes everything needed for a quick and accurate replacement:
• Ignition Control Module
• Quick -Select/Quick-Connect Wiring Harnesses.
• Universal Nitride Ignitor Kit – 21D64-2
• Installation Instructions and OEM Cross-Reference.

Features:
•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.

Electrical Rating:
Input Voltage . . . . . . . . . . . . . . . . . . . . 24 VAC, 60 Hz (Class II transformer required)
Nom. Input Current @ 24 VAC . . . . . . 595 mA + MV
Relay Load Ratings:
Gas Valve Relays . . . . . . . . . . . . . . . . 1.5 amps @ 24 VAC, 60 Hz
Inducer Relays . . . . . . . . . . . . . . . . . . 2.2 FLA – 3.5 LRA @ 120 VAC
Humidifier Load . . . . . . . . . . . . . . . . . . 1.0 amp max. @ 120 VAC
Electronic Air Cleaner Load . . . . . . . . . 1.0 amp max. @ 120 VAC
Ignitor Relay . . . . . . . . . . . . . . . . . . . . 4.0 amps max. @ 132 VAC, 60 Hz
Flame Current Requirements:
Minimum current to insure flame detection 0.3 µa DC*
Maximum current for non-detection . . . 0.1 µa DC*
Maximum allowable leakage resistance 100 M ohms
*Measured with a DC microameter in the flame probe lead
Operating Temperature Range . . . . . . -40o to 175o
F (-40 to 80o
C)
Humidity Range . . . . . . . . . . . . . . . . . . 5% to 93% relative humidity (non-condensing)
Flame Failure Response Time . . . . . . 2.0 sec. max. @ 60Hz