White-Rodgers 21V51U-843 2 Stage Furnace Control Kit

White-Rodgers 21V51U-843 Universal 2 Stage ECM Furnace Control Kit

Replaces White-Rodgers 50V51-XXX€™s and 50V61-XXX€™s Two-Stage HSI Systems with 80V or 120V Ignitor.

Features:

• 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

Specifications:

Electrical Ratings [@ 77°F (25°C)]
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, 60Hz
Humidifier Load: 1.0 amp max. @ 120 VAC, 60Hz
Electronic Air Cleaner Load: 1.0 amp max. @ 120 VAC, 60Hz
Ignitor Relay: 4.0 amps max. @ 132 VAC, 60 Hz

Flame Current Requirements
Minimum current to insure flame detection: 0.3 ?a DC*
Maximum current for non-detection: 0.1 ?a DC*
Maximum allowable leakage resistance: 100 M ohms
   *Measured with a DC microammeter in the flame probe lead

Operating Temperature Range
-40° to 175°F (-40° to 80°C)

Humidity Range
5% to 93% relative humidity (non-condensing)

Timing Specifications (@ 60 Hz)
Flame Failure Response Time: 2.0 sec. max.

Gases Approved: Natural, Manufactured, Mixed, Liquefied Petroleum and LP Gas/Air Mixtures are all aproved for use

Kit Includes:

• Ignition Control Module
• Wiring Harness for Amana/Goodman
•  Universal 120V Nitride Ignitor Kit €“ 21D64-2
•  Installation Instructions and OEM Cross-Reference

Replaces:

White-Rodgers 18M9901, 20300002, 20300004, 20300006, 49M5901, 50V51-243, 50V51-288, 50V51-289, 50V51-290, 50V51-507, 50V61-120, 50V61-143, 50V61-288, 50V61-289, 50V61-507, B1809925, B1809927, B1809927S, CNT03078, D156245P01, D34142P01, PCB00106, PCB00106S, PCBBF106, PCBBF106S, PCBBF107S, X13650840010