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Furnace Control Kit, HSI Integrated, Single Stage, Nitride Ignition, 25 Vac


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Manufacturer Part No:
Newark Part No.:
Technical Datasheet:
21D83M-843   Datasheet
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Product Information

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Ignition Ctrl Brd, Wiring Harness, Mounting Panel, 4xStand-Offs, Circuit Breaker, Wiring Diagrams


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Technical Docs (2)

Product Overview

The 21D83M-843 from White Rodgers is a single-stage/HSI integrated furnace control replacement kit. It is an OEM replacement kit that simplifies installation and ensures peak system performance. The kit has 50A66-843 which is an automatic gas interrupted ignition control that employs a microprocessor to continually monitor, analyse and control the proper operation of the gas burner, inducer and fan. These controls incorporate system fault analysis for quick gas flow shut-off, coupled with automatic ignition retry upon sensing a fault correction. Replaces Lennox models. It features diagnostic indicator flash codes, 3 fan speeds, remote flame sense, humidifier and electronic air cleaner connections (optional).
  • Input voltage of 25VAC, 50/60Hz
  • Maximum input current at 25VAC is 0.45A
  • Valve relay of 1.5A at 25VAC 50/60 Hz, 0.6pf
  • Ignitor relay of 2A at 120VAC, 50/60Hz (resistive)
  • Inducer relay of 2.2 FLA to 3.5 LRA at 120VAC
  • Circulator relay of 14.5 FLA to 25.0 LRA at 120VAC
  • Operating temperature range from -40°F to +175°F (-40°C to +79°C)
  • Humidity range from 5% to 93% relative humidity (non-condensing)
  • Natural, manufactured, mixed, liquefied petroleum and LP gas air mixtures are approved gases for use


Automation & Process Control


1 x 50A66-843 ignition control board, 1 x wiring harness (9pin to 12pin), 1 wiring harness (4pin to 6pin), 1 x mounting panel, 4 x stand-off fasteners, 1 x circuit breaker, 1 x 4" blue wire, 2 x wiring diagrams.

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