White-Rodgers™ 21V51U-843

White-Rodgers™ 21V51U-843 Universal Hot Surface Ignition Control, 25 VAC, 530 mA

Manufacturer: Copeland
Brand Name: White-Rodgers™
Part#: 21V51U-843
MPN: 21V51U-843
Min. Order Qty: 1
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Accessory Type      :      Hot Surface Ignition Control
Amperage Rating      :      530 mA
Depth      :      1-1/4 in
Domestic/Import      :      Import
Electrical Connections      :      1/4 in Spade Terminal and Molex Plug
Gas Type      :      Liquid Propane/Natural Gas
Height      :      8 in
Igniter Warm-Up Time      :      17 s
Lead Length      :      15-1/2 in
Probe Length      :      15-1/2 in
Type      :      Universal
Voltage Rating      :      25 VAC
Width      :      5-1/4 in

The 50V51-843 is a two stage automatic gas interrupted ignition control employing a microprocessor to continually monitor, analyze, and control the proper operation of the gas burner and inducer. the 50V51-843 provides signals for proper operation of a variable fan speed circulator blower signals interpreted during continual surveillance of the two stage thermostat and flame sensing element initiate automatic ignition of the burner, sensing of the flame, and system shutoff during normal operation. the control incorporates system fault analysis for quick gas flow shutoff coupled with automatic ignition retry upon sensing a fault correction.

White-Rodgers™ Hot Surface Ignition Control, Universal, Accessory Type: Hot Surface Ignition Control, 15-1/2 in Lead Length, 15-1/2 in Probe Length, 25 VAC, 530 mA, 1/4 in Spade Terminal and Molex Plug Electrical Connections, Liquid Propane/Natural Gas Gas, 17 s Igniter Warm-Up, 5-1/4 in Width, 1-1/4 in Depth, 8 in Height, Import

  • 16-pin variable speed circulator output for ECM
  • Dipswitch selectable for OEM applications two-speed inducer output, two 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
  • -40 to 175 deg F
  • 2-stage gas valve output
  • 3 A fuse protection
  • Pressure switch inputs and monitoring
  • Flash microprocessor with non-volatile memory
  • Flame current measurement points
  • 1.5 A valve relay
  • 2.2 FLA to 3.5 LRA inducer relay
  • 14.5 FLA to 25 LRA circulator relay
  • 1 a max at 120 VAC humidity
  • 1 a max at 120 VAC electronic air cleaning
  • 4 a max at 132 VAC ignitor relay
  • 0.3 uA DC max current for flame detection
  • 0.1 uA DC min current for flame detection
  • 100 M ohm leakage resistance, 3 speed PSC blower motor systems

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