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Universal Two-Stage HSI Integrated Variable Speed (ECM) Furnace Control Kit

SKU: 21V51U-843

$243.77each

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Description

This easy to install kit includes everything you need for quick and accurate replacement of all White Rodgers 50V51-XXX's and 50V61-XXX's. Simplifies stocking, installation and ensures peak system performance.

Kit Includes:

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

Features:

  • 16-pin variable speed circulator output for ECM (Electronically Commutated Motor)
  • 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 igniter output
  • 120 VAC humidifier output
  • 120 VAC electronic air cleaner output
  • 120 VAC two-speed inducer output
  • 2-Stage Gas Valve Output
  • OEM Application - Dipswitch Selectable
  • Fuse Protection - 3 Amp
  • CFM LED - (Green)
  • 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

Product Features

  • Universal Furnace Electronic Fan Timer control for single stage furnaces with PSC inducer and blower motors
  • Works with non-integrated furnace controls or intelligent gas valves
  • Six mounting hole options
  • Harnesses with terminal flags for easy wiring
  • Terminals are labeled to match multiple existing boards
  • Transformer connections offer 1/4" and 3/16" terminals
  • Tri-Color LED displays status and fault codes
  • Exclusive fault recall button

Product Specifications

  • Stages: Single Stage
  • Operating Voltage: Input 24 Vac, 60 Hz
  • Line Voltage: 115-230 Vac, 60 Hz
  • Inducer Motor/Blower Motor: PSC
  • Ambient Operating Temperature: -40 to 175°F (-40 to 80°FC)
  • Humidity Range: 5% to 95% relative humidity (non-condensing)

Product Specifications:

  • Description: 1/2 in. NPT x 1/2 in. NPT Intermittent Hot Surface Pilot Ignition SmartValve Control with fast-fast opening and 3.4 in. wc pressure regulator setting
  • Flame Sense: Electrode
  • Type of Gas: Natural
  • Ignition System Type: Intermittent Hot Surface Pilot Ignition
  • Ignition Sequence: Intermittent Pilot
  • Ignition Source: Pilot
  • Ignition Trials To Lockout: Continuous Retry
  • PrePurge: None
  • Body Pattern: Straight-through
  • Opening Characteristics: Fast-Fast Opening
  • Ignition Trial Time (sec): 90 sec
  • Electrical Ratings: 24 Vac
  • Frequency: 60 Hz; 50 Hz
  • Flame Failure Response Time (sec): 1.6 sec @ 3 µA
  • Ambient Temperature Range (F): -40 F to +175 F
  • Ambient Temperature Range (C): -40 C to +79 C
  • Pressure Regulator Setting (psi): 3.4 in. wc
  • Pressure Regulator Setting (kPa): 0.87 kPa
  • Pressure Ratings (psi): 1/2 psi
  • Pressure Ratings (kPa): 3.45 kPa
  • Inlet/Outlet Size (in.): 1/2 in. NPT x 1/2 in. NPT
  • Maximum Capacity (ft³/hr): 200 ft³/hr
  • Maximum Capacity (m³/hr): 5.7 m³/hr
  • Minimum Capacity (ft³/hr): 20 ft³/hr
  • Minimum Capacity (m³/hr): 0.6 m³/hr
  • Maximum Capacity at 1 in. P.D. (ft³/hr): 150 ft³/hr
  • Maximum Capacity at 1 in. P.D. (m³/hr): 4.2 m³/hr
  • Pilot Gas Outlet: Yes
  • Typical Ignition Hardware: Q3450
  • Approvals, American Gas Association IAS: IAS Design Certified: C2030017

Maintenance & Troubleshooting:

  • This capacitor is typically replaced when diagnostics indicate a run capacitor is out of specification or when motor operation issues are traced to the dual run capacitor (diagnostic procedures are not provided in the supplied sources).
  • If issues persist after replacement, confirm the installed capacitor matches the required MFD and voltage ratings and that all connections are correct per the equipment documentation.

Certifications & Compliance:

  • Manufacturer listing states UL & cUL for these capacitors.

User Reviews & Q&A Summary:

  • Review themes commonly describe it as a correct replacement capacitor that restores cooling operation when a failed capacitor is replaced.
  • Many comments focus on getting the right part quickly and returning equipment to service, with frequent notes about straightforward replacement once the correct rating is confirmed.

Product Highlights

Product Highlight: Ignition TypeIntermittent Hot Surface Pilot     Product Highlight: Stages2     Product Highlight: Height (Inches)8" Height     Product Highlight: Depth (Inches)1-1/4" Depth

Specs

Ignition Type:

Intermittent Hot Surface Pilot

Stages:

2

Operating Temp Range:

-40° to 175°F

Humidity Range:

5% to 93% Relative Humidity (Non-Condensing)

Width:

5-1/4"

Height (Inches):

8"

Depth (Inches):

1-1/4"

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