American Standard Furnace Install Manual

The American Standard Furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This installation manual covers proper setup, safety requirements, electrical connections, gas line connections, venting systems, startup procedures, and maintenance guidelines for optimal operation. Below are key sections for safety, installation steps, electrical requirements, gas connections, venting, startup, and troubleshooting.

Safety Precautions

Critical safety information for proper furnace installation and operation.

Installation Requirements

Proper installation location and clearance requirements.

1. Location: Install in clean, dry area with adequate combustion air.
2. Clearance: Maintain 1-inch clearance from combustible materials.
3. Leveling: Ensure furnace is level for proper condensate drainage.
4. Access: Provide adequate service clearance (minimum 24 inches front access).

WARNING! Installation must comply with local codes and National Fuel Gas Code.

Electrical Connections

Proper wiring and electrical requirements.

1. Disconnect power: Turn off electrical power at service panel.
2. Line voltage: Connect 120VAC, 15-amp circuit with proper grounding.
3. Low voltage: Connect thermostat wires to appropriate terminals (R, W, G, C).
4. Polarity: Ensure proper hot and neutral connections.

CAUTION! All electrical work must be performed by qualified technician.

Gas Line Connections

Natural gas or propane connection procedures.

• Pipe Size: Use appropriate gas pipe size for BTU rating.
• Pressure Test: Test gas line at 14 inches WC for 10 minutes.
• Gas Valve: Connect to manual shutoff valve within 6 feet.
• Drip Leg: Install sediment trap in gas line.
• Manifold Pressure: Set to manufacturer specifications (typically 3.5" WC natural gas).

Venting System

PVC vent pipe installation requirements.

Concentric Vent: Use manufacturer-approved PVC pipe and fittings.

1. Route vent: Maintain proper slope for condensate drainage.
2. Termination: Locate vent terminal according to clearance requirements.
3. Support: Secure vent pipes every 4 feet.
4. Sealing: Use PVC cement on all joints.

Tip: Verify vent length does not exceed manufacturer maximum.

Startup Procedure

Step-by-step furnace startup and verification.

1. Gas pressure: Verify inlet and manifold pressures.
2. Vent system: Check for proper draft and secure connections.
3. Electrical: Restore power and verify control board operation.
4. Ignition: Initiate heating cycle and observe flame characteristics.
5. Combustion: Measure flue gas CO levels and temperature rise.
6. Safety controls: Verify limit switch and pressure switch operation.

WARNING! Never bypass safety controls during startup.

Operating Instructions

Normal furnace operation and user controls.

Thermostat: Set to HEAT mode and desired temperature.

Sequence of Operation: Thermostat call for heat → inducer motor starts → pressure switch proves draft → hot surface igniter glows → gas valve opens → flame sensor confirms ignition → blower starts after heat exchanger warms.

Maintenance Schedule

Recommended maintenance for optimal performance.

Annual maintenance by qualified technician: Clean burners, check heat exchanger, verify gas pressure, clean flame sensor, inspect vent system, check condensate drain, lubricate blower motor if required.

CAUTION! Turn off gas and electrical power before performing maintenance.

Specifications

• Input BTU: 40,000 - 120,000 BTU/hr
• Efficiency: 80% - 98% AFUE
• Gas Type: Natural gas or propane
• Electrical: 120V, 60Hz, 15 amp circuit
• Venting: PVC Category IV
• Dimensions: Varies by model
• Warranty: 20-year heat exchanger, 5-year parts

Troubleshooting

Reset: Turn power off for 30 seconds to reset control board.

Service: Contact qualified HVAC technician for complex issues.