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Integrated Furnace Controls Universal Replacement

Replaces over 550 OEM, White-Rodgers and competitive models

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21M51U-843
21M51U-843, Integrated Furnace Controls Universal Replacement
Ignitor Voltage
120 Vac
Mounting
Standoff
Stages
Two-Stage
Product Category
Ignition Controls and Modules
Model Number
21M51U-843
Ignitor Voltage
Mounting
Stages
Product Category
Model Number
120 Vac
Standoff
Two-Stage
Ignition Controls and Modules
21M51U-843
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21V51U-843
21V51U-843, Integrated Furnace Controls Universal Replacement
Ignitor Voltage
120 Vac
Mounting
Standoff
Stages
Two-Stage
Product Category
Ignition Controls and Modules
Model Number
21V51U-843
Ignitor Voltage
Mounting
Stages
Product Category
Model Number
120 Vac
Standoff
Two-Stage
Ignition Controls and Modules
21V51U-843
WHERE TO BUY
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50A55 843S1
50A55-843, Integrated Furnace Controls Universal Replacement
Ignitor Voltage
120 Vac
Mounting
Flush Mount
Stages
Single Stage
Product Category
Ignition Controls and Modules
Model Number
50A55-843
Ignitor Voltage
Mounting
Stages
Product Category
Model Number
120 Vac
Flush Mount
Single Stage
Ignition Controls and Modules
50A55-843
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50A65 843S1
50A65-843, Integrated Furnace Controls Universal Replacement
Ignitor Voltage
80 Vac
Mounting
Flush Mount
Stages
Single Stage
Product Category
Ignition Controls and Modules
Model Number
50A65-843
Ignitor Voltage
Mounting
Stages
Product Category
Model Number
80 Vac
Flush Mount
Single Stage
Ignition Controls and Modules
50A65-843
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50M56X-843
50M56X-843, Integrated Furnace Controls Universal Replacement
Ignitor Voltage
120 Vac
Mounting
Flush Mount
Stages
Single Stage
Product Category
Ignition Controls and Modules
Model Number
50M56X-843
Ignitor Voltage
Mounting
Stages
Product Category
Model Number
120 Vac
Flush Mount
Single Stage
Ignition Controls and Modules
50M56X-843
WHERE TO BUY
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Features

  • Reduces inventory by providing maximum control replacement coverage
  • Select models include a universal 120V nitride ignitor to allow replacement of 80V and 120V controls
  • Diagnostic LED indicators streamline installation and system troubleshooting
  • 120V air cleaner output and 120V humidifier output up to 1 Amp max
  • Factory standard safety timings and adjustable fan delay options
  • Replaceable automotive style fuse

Specifications

Low Voltage Circuit
24 Vac, 50/60 Hz
Line Voltage Circuit
120 Vac, 50/60HZ
Circulator Relay
14.5 FLA - 25.0 LRA @ 120 Vac
Operating Temperature Range
-40° to 175°F (-40° to 79°C)
Humidity Range
5% to 93% relative humidity (non-condensing)
Agency Approvals
CSA (Canada & US)

Documents & Drawings

1
Product images shown are for illustration purposes only and may not be an exact representation of the product or package contents