American Standard Furnace Manual Installation

The American Standard Furnace is a high-efficiency heating system designed for residential and light commercial applications. This installation manual covers proper setup, safety procedures, electrical connections, gas line connections, venting requirements, and initial startup procedures for optimal performance and safety compliance.

Safety Precautions

Critical safety information for proper furnace installation and operation.

Pre-Installation Requirements

Essential preparations before beginning furnace installation.

1. Verify local codes and obtain necessary permits
2. Check furnace model matches job requirements and specifications
3. Ensure adequate space for installation and service access
4. Confirm proper gas supply line size and pressure
5. Verify electrical service meets furnace requirements
6. Plan venting route and confirm clearances

WARNING! Installation must comply with all national and local codes. Only qualified technicians should perform installation.

Unpacking and Inspection

Proper procedures for receiving and inspecting the furnace unit.

1. Inspect shipping container for damage before accepting delivery
2. Carefully remove furnace from packaging materials
3. Check for shipping damage to cabinet, heat exchanger, and components
4. Verify all included parts against packing list
5. Remove shipping blocks and protective covers from blower and burners
6. Save all documentation and warranty information

CAUTION! Do not install damaged equipment. Report damage to carrier immediately.

Installation Location

Proper furnace placement and clearance requirements.

• Location Type: Indoor installation only in conditioned spaces
• Clearance Front: 24 inches minimum for service access
• Clearance Sides: 6 inches minimum from combustible materials
• Clearance Rear: 6 inches minimum from combustible materials
• Floor Protection: Required for installation on combustible flooring
• Venting Access: Ensure straight vent runs with proper support
• Drain Access: Location must allow for condensate drainage

Venting System Installation

Proper venting installation for safe furnace operation.

1. Select appropriate vent pipe material (PVC, CPVC, or ABS as specified)
2. Maintain minimum 1/4 inch per foot slope toward furnace
3. Use proper primer and cement for all joints
4. Install vent termination with proper clearances from windows and doors
5. Secure vent pipes with appropriate hangers every 4 feet
6. Install air intake pipe following same requirements as exhaust

Tip: Always follow manufacturer's specific venting requirements for your model.

Gas Line Connections

Safe gas line installation procedures.

1. Shut off gas supply at main valve
2. Install sediment trap ahead of gas valve
3. Use proper pipe dope or Teflon tape on threaded connections
4. Install manual shutoff valve within 6 feet of furnace
5. Pressure test gas line at 14 inches WC for 10 minutes with no drop
6. Connect flexible gas connector if local codes permit
7. Check for leaks with soap solution after connections complete

WARNING! Gas connections must be made by qualified personnel only. Never use matches or open flames to check for leaks.

Electrical Wiring

Proper electrical connections for safe furnace operation.

Power Supply: 120V AC, 15 amp circuit with proper grounding. Low Voltage: 24V thermostat wiring with proper polarity.

Main Power: Connect black (hot), white (neutral), green (ground) wires to appropriate terminals. Thermostat: Connect R (power), W (heat), G (fan), C (common) as required. Safety Switches: Ensure door switch and rollout switches are properly connected.

Ductwork Connections

Proper duct system installation for optimal airflow.

1. Size return air duct to match furnace capacity
2. Install filter rack with proper sealing
3. Connect supply plenum with sheet metal screws and mastic sealant
4. Ensure adequate return air from multiple locations if possible
5. Balance airflow to all supply registers
6. Seal all duct connections to prevent air leakage

Tip: Use manual D calculations for proper duct sizing based on furnace capacity.

Condensate Drain Setup

Proper condensate drainage system installation.

1. Connect primary condensate line to furnace drain port
2. Install secondary drain port with safety switch
3. Route drain lines with proper slope away from furnace
4. Terminate drain lines in floor drain or condensate pump
5. Install trap in drain line if required by local codes
6. Test drain system by pouring water through drain pan

CAUTION! Condensate must drain properly to prevent water damage and furnace shutdown.

Initial Startup and Testing

Proper procedures for initial furnace startup and system verification.

1. Verify all connections are complete and secure
2. Install clean air filter in proper direction
3. Restore electrical power to furnace
4. Open gas supply valve slowly
5. Set thermostat to call for heat
6. Observe ignition sequence and flame quality
7. Check gas pressure and adjust if necessary
8. Measure temperature rise across heat exchanger
9. Verify proper venting and combustion air supply
10. Test safety controls and limit switches

WARNING! Never bypass safety controls during testing. Always follow manufacturer's startup sequence.

Troubleshooting

Reset: Power cycle furnace by turning off power for 30 seconds then restoring.

Service: Contact qualified HVAC technician for complex issues. American Standard Support: 1-800-000-0000