American Standard Furnace AUX2C100A9482AA Manual

The American Standard AUX2C100A9482AA is a high-efficiency gas furnace with 100,000 BTU input capacity, featuring two-stage heating operation, variable-speed blower motor, durable heat exchanger construction, electronic ignition system, and compatibility with various thermostat systems. Designed for residential forced-air heating applications with AFUE ratings up to 96%. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Two-stage gas valve, variable-speed ECM blower motor, aluminized steel heat exchanger, hot surface ignitor, pressure switches, flame sensor, control board.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in level, clean, dry area with adequate service clearance.
2. Combustion Air: Ensure proper combustion and ventilation air supply.
3. Venting: Install PVC vent pipes per manufacturer specifications.
4. Gas Connection: Use approved pipe compound on male threads only.
5. Electrical: Connect to dedicated 120V circuit with proper grounding.
6. Ductwork: Ensure proper sizing and sealing of supply/return ducts.

WARNING! Gas furnaces produce carbon monoxide. Proper installation and venting are critical for safety. Installation must comply with NFPA 54/ANSI Z223.1.

Initial Setup & Startup

Professional startup procedure required for warranty validation.

1. Verify installation: Check all connections, clearances, and venting.
2. Electrical power: Turn on furnace disconnect and thermostat.
3. Gas supply: Open main gas valve and verify no leaks.
4. System check: Set thermostat to heat mode above room temperature.
5. Operation verification: Confirm proper ignition, heating, and blower operation.
6. Airflow measurement: Verify proper CFM and temperature rise.

CAUTION! Only qualified HVAC technicians should perform startup procedures. Incorrect setup can create hazardous conditions.

Technical Specifications

• Model: AUX2C100A9482AA
• Heating Capacity: 100,000 BTU/hr input, 96,000 BTU/hr output
• AFUE Rating: Up to 96%
• Stages: Two-stage heating
• Blower Type: Variable-speed ECM
• Motor Speeds: Multiple speeds for heating and continuous fan
• Gas Type: Natural gas
• Gas Pressure: 3.5" WC manifold pressure
• Electrical: 120V/60Hz/1Ph, 7.5 amps
• Dimensions: Varies by installation configuration
• Weight: Approximately 120 lbs

Controls & Operation

Integrated control board manages all furnace functions with LED status indicator.

Thermostat Connections: R, C, W1, W2, G, Y1, Y2 compatible with most modern thermostats.

Operation Modes: Two-stage heating operation automatically adjusts based on heating demand. Continuous fan operation available for air circulation. Control board features built-in diagnostics with LED flash codes for troubleshooting. Safety controls include rollout switches, pressure switches, flame sensor, and high-limit switches.

Venting & Combustion Air

Direct vent system using PVC pipe for both intake and exhaust.

1. Vent Pipe: Use only approved PVC, CPVC, or ABS pipe.
2. Termination: Follow manufacturer clearances from windows, doors, and openings.
3. Slope: Vent pipes must slope back toward furnace for drainage.
4. Combustion Air: Ensure adequate air supply for proper combustion.
5. Sealing: All joints must be properly sealed with approved cement.

Tip: Regular inspection of vent termination is essential to prevent blockage from snow, ice, or debris.

Maintenance Procedures

Annual professional maintenance recommended for optimal performance and safety.

1. Filter Replacement: Change filter every 1-3 months depending on usage.
2. Blower Cleaning: Vacuum blower assembly and motor annually.
3. Heat Exchanger: Professional inspection for cracks or damage.
4. Burner Cleaning: Remove and clean burners as needed.
5. Flame Sensor: Clean with emery cloth annually.
6. Drain System: Clear condensate drain lines and trap.
7. Vent Inspection: Check for obstructions or damage.
8. Electrical: Check connections and component operation.

WARNING! Turn off electrical power and gas supply before performing any maintenance. Only qualified technicians should service internal components.

Safety Features

Multiple safety systems protect against hazardous conditions: Flame rollout switches, pressure switches, high-limit switches, flame sensor, ignitor control, and control board diagnostics. Carbon monoxide detector installation recommended in living spaces.

Cleaning & Care

Regular cleaning maintains efficiency and extends equipment life.

Exterior: Wipe with damp cloth. Interior: Professional cleaning only. Filters: Replace regularly. Vents: Keep clear of obstructions.

CAUTION! Do not use water or cleaning solutions on electrical components. Keep area around furnace clear of combustible materials.

Regulatory Information

UL listed and ANSI certified. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for safety and performance. For technical support, contact American Standard at 1-800-926-4662 or visit www.americanstandardair.com. Warranty registration required within 60 days of installation.

Troubleshooting Guide

Reset Procedure: Turn power off for 30 seconds, then restore. If problem persists, call for service.

Emergency Service: 1-800-926-4662; www.americanstandardair.com