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General| Model Number | 50A65-475 |
|---|---|
| Brand | American Standard |
| Category | Control Unit |
| Voltage | 24V |
| Replaces | 50A65-474 |
| Application | Furnace |
Details LED flash codes and their meanings for troubleshooting IFC faults.
Explains the structure and meaning of furnace model numbers.
Describes the ignitor's material makeup and its common abbreviation (SiNi).
Illustrates and labels components in a single-stage, 80% upflow/horizontal furnace.
Illustrates and labels components in a single-stage, 90% upflow/horizontal furnace.
Details the CNT2854 control, its supersession, electrical ratings, and settings.
Explains the heating cycle sequence for single-stage furnaces.
Provides a visual representation of electrical connections for single-stage furnaces.
Illustrates and labels components in a two-stage, 80% upflow/horizontal furnace.
Details the CNT03077 control, its electrical ratings, and DIP switch settings.
Explains the operational sequence for two-stage furnaces with specific models.
Provides the wiring schematic for two-stage heat furnace control.
Illustrates components for 80% two-stage furnaces with variable speed blowers.
Details the CNT03078 IFC, including its pinouts and switch settings.
Describes the sequence of operation for two-stage variable speed furnaces.
Provides the wiring schematic for two-stage variable speed blower systems.
Illustrates components for 90% two-stage furnaces with variable speed vent motors.
Details the CNT2871 IFC, electrical ratings, and timing settings.
Explains how the variable speed vent motor learns optimal operating speeds.
Describes the new inducer motor assembly and its mounting.
Explains the sequence for 50V65 models with variable speed vent motors.
Provides the wiring schematic for two-stage heat/variable speed systems.
Illustrates components for 90% two-stage furnaces with variable speed blowers.
Details the CNT02536 IFC, including its terminal layout and switch functions.
Explains the sequence for 50A61 models with variable speed motors.
Provides the wiring diagram for two-stage variable speed vent motors and blowers.
Covers first and second stage heat sequences, and stage satisfaction logic.
Explains normal LED operation and lists fault codes for diagnostic purposes.
Compares ignition control flash codes across various White-Rodgers models.
Details how to measure vent motor RPM using a Hertz meter and expected ranges.
Correlates red status LEDs and green RPM LEDs with motor faults.
Outlines the steps for diagnosing vent motor issues using a specific troubleshooting device.
Provides a step-by-step manual procedure for diagnosing vent motor problems.
Offers rapid diagnostic checks for ECM™ 2 variable speed furnace motors.
Shows the schematic of the control board connections for V-squared furnace motors.
Provides tables for maximum vent and inlet air pipe lengths based on altitude and pipe diameter.
Illustrates connection diagrams for twinning one-stage furnaces using single-wire methods.
Details manifold pressure settings for different gas valve models and fuel types.
Lists pressure switch settings in inches of water column for various furnace models.
Illustrates the proper connections for pressure switches in direct vent furnaces.
Explains the procedure for checking manifold pressure, referencing burner box static.
Details the correct method for checking manifold pressure with burner box reference.
Describes the annual cleaning process for the inducer controller air stirring fan.
Provides a legend for system wiring, defining terminals, types, and wire colors.
