American Standard 95 Furnace Installation Manual

The American Standard 95 Furnace is a high-efficiency gas furnace with 95% AFUE rating, featuring variable-speed blower technology, durable heat exchanger construction, multiple venting options, integrated diagnostic controls, and compatibility with various thermostat systems. Designed for residential forced-air heating applications with natural gas or propane capability. Below are key sections for safety, features, installation procedures, setup, operation guidelines, and troubleshooting.

Features at a Glance

Key components: Stainless steel heat exchanger, variable-speed ECM blower motor, integrated control board, gas valve assembly, pressure switches, inducer motor, and diagnostic LED system.

Safety Precautions

Read all instructions before beginning installation. Ensure proper clearances and ventilation.

1. Gas line safety: Check for leaks using approved leak detection solution.
2. Electrical safety: Disconnect power before servicing electrical components.
3. Venting safety: Ensure proper slope and termination clearances.
4. Combustion air: Verify adequate combustion and ventilation air supply.

WARNING! Furnace contains high voltage and combustible gas. Only qualified technicians should perform installation. Carbon monoxide hazard exists if improperly installed.

Installation Requirements

Verify local codes and obtain necessary permits before installation.

1. Location: Install in approved locations with proper clearances to combustible materials.
2. Foundation: Level, solid foundation capable of supporting furnace weight.
3. Clearances: Minimum 1-inch clearance to combustible materials on sides and rear.
4. Access: Maintain service access to front, filter, and control panel areas.
5. Ductwork: Properly sized and sealed duct system required for optimal performance.

CAUTION! Furnace is heavy; use proper lifting equipment and techniques.

Specifications

• AFUE Rating: 95%
• Input Capacity: 40,000 to 120,000 BTU/H (multiple models)
• Gas Type: Natural gas or propane (conversion kit required)
• Electrical: 120V AC, 60Hz, 15 Amp circuit
• Blower Type: Variable-speed ECM
• Venting: PVC, CPVC, or ABS (2-inch or 3-inch diameter)
• Operating Temp Range: -30°F to 150°F ambient
• Sound Rating: Ultra-quiet operation (< 65 dB)
• Warranty: 20-year heat exchanger, 10-year parts

Controls and Settings

Access control board via front service panel. Integrated diagnostic system with status LED.

Control Board: POWER switch, FUSE, STATUS LED, DIP switch settings, thermostat terminals.

DIP Switch Settings: Heating capacity selection, blower speed adjustments, accessory configuration. Status LED: Flashing patterns indicate system status and fault codes. Thermostat Connections: R, C, W, G, Y terminals for standard thermostat wiring.

Venting System Installation

PVC, CPVC, or ABS vent pipe required. Follow manufacturer venting tables for proper sizing.

1. Determine vent length: Calculate total equivalent vent length including elbows.
2. Install vent pipes: Use approved cement and follow proper slope requirements.
3. Termination: Install vent termination with proper clearances from windows, doors, and air intakes.
4. Test system: Verify proper draft and combustion after installation.

Tip: Use manufacturer venting tables to ensure proper vent sizing for installation.

Gas Line Connection

Natural gas or propane connection with proper sizing and pressure regulation.

1. Gas line sizing: Calculate required pipe size based on furnace input and length.
2. Install sediment trap: Include drip leg before gas valve connection.
3. Pressure test: Test gas line for leaks before connecting to furnace.
4. Connect gas line: Use approved pipe compound or tape on threaded connections.
5. Set gas pressure: Verify manifold pressure per specifications (3.5" WC natural gas).

WARNING! Always test for gas leaks after installation. Use approved leak detection solution.

Electrical Wiring

120V AC power supply and 24V thermostat control wiring.

1. Power supply: Connect to dedicated 15 Amp circuit with proper grounding.
2. Thermostat wiring: Connect R, C, W, G, Y terminals as required.
3. Accessory wiring: Connect humidifier, electronic air cleaner, or ventilation systems.
4. Safety switches: Install door safety switch and high limit controls.

CAUTION! Disconnect power before servicing electrical components.

Startup and Commissioning

Complete system verification and performance testing.

1. Power up: Restore electrical power and verify control board operation.
2. Gas verification: Check for gas leaks and verify proper gas pressure.
3. Venting check: Verify proper draft and combustion air flow.
4. Sequence test: Initiate heating cycle and verify proper sequence of operation.
5. Temperature rise: Measure temperature rise and adjust blower speed if necessary.
6. Combustion analysis: Verify proper combustion efficiency and CO levels.

WARNING! Complete combustion analysis required to ensure safe operation.

Maintenance Guidelines

Regular maintenance required for optimal performance and safety.

Annual maintenance: Replace air filter, clean burners, inspect heat exchanger, check vent system, verify safety controls. Filter replacement: Replace 1-inch filters monthly, 4-inch filters every 6 months.

CAUTION! Only qualified technicians should perform internal maintenance. Disconnect power and gas before servicing.

Troubleshooting

Reset: Power cycle furnace to clear lockout conditions.

Service: 1-800-american; www.americanstandard.com