Armstrong 96 Furnace Install Manual

The Armstrong 96 Furnace is a high-efficiency gas furnace with 96% AFUE rating, featuring variable-speed blower technology, sealed combustion system, durable heat exchanger, electronic ignition, multi-speed ECM motor, integrated diagnostic controls, and compatibility with standard thermostat systems. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, installation procedures, wiring, startup, maintenance, and troubleshooting.

Safety Precautions

Critical safety information for installers and homeowners.

Installation Requirements

Essential requirements before beginning installation.

1. Location: Indoor installation only; protected from weather and moisture.
2. Clearance: Minimum 24 inches front access, 6 inches sides, 12 inches top.
3. Foundation: Level, solid concrete or approved furnace pad.
4. Combustion Air: Adequate fresh air supply as per local codes.
5. Permits: Obtain all required building and mechanical permits.

WARNING! Installation must comply with all local codes and ordinances. Professional installation recommended.

Unit Specifications

• Model Series: Armstrong 96
• AFUE Rating: 96%
• Input Capacity: 40,000 - 120,000 BTU/hr
• Gas Type: Natural Gas or Propane (conversion kit required)
• Voltage: 120V AC, 60Hz
• Blower Motor: Variable-speed ECM
• Venting: PVC pipe (2-inch minimum)
• Dimensions: Varies by model (check specific model label)
• Weight: 85-150 lbs depending on model

Pre-Installation Checklist

Verify all items before proceeding with installation.

1. Verify correct furnace model and size for application
2. Check for shipping damage; report any issues immediately
3. Confirm all required parts and accessories are present
4. Review local code requirements and obtain permits
5. Ensure adequate workspace and proper tools available
6. Verify gas supply pressure and electrical service

Installation Procedures

Step-by-step installation instructions.

1. Position furnace: Place on level surface with proper clearances
2. Remove access panels: For internal component access
3. Install filter rack: Position for easy filter replacement
4. Set blower speed: Adjust for proper airflow (see specifications)
5. Connect ductwork: Seal all joints with approved duct sealant
6. Install condensate drain: Route to approved drain location

CAUTION! Two-person lift required. Use proper lifting techniques.

Venting System

PVC vent pipe installation requirements.

1. Plan vent route: Minimum 1/4 inch per foot slope toward furnace
2. Cut PVC pipe: Use fine-tooth saw; deburr all edges
3. Assemble joints: Use PVC primer and cement; ensure watertight seals
4. Support pipes: Use hangers every 4 feet maximum
5. Terminate vents: Follow clearance requirements (12 inches minimum from openings)
6. Test system: Verify proper draft and combustion

Tip: Use separate pipes for intake and exhaust unless using concentric vent kit.

Gas Line Connection

Natural gas or propane connection procedures.

1. Shut off gas supply: At main valve before beginning work
2. Install sediment trap: Downstream of gas shutoff valve
3. Connect gas line: Use approved pipe compound on threaded joints
4. Pressure test: Test at 14 inches WC for 10 minutes (no drop)
5. Check for leaks: Use leak detection solution on all connections
6. Convert for propane: If required, install conversion kit per instructions

WARNING! Gas connection must be performed by qualified technician only.

Electrical Wiring

Electrical connections and thermostat wiring.

1. Disconnect power: At main electrical panel before wiring
2. Connect line voltage: 120V AC supply with proper grounding
3. Wire thermostat: Use 18-gauge minimum; follow color coding
4. Connect humidifier: If equipped, follow accessory instructions
5. Install disconnect: Within sight of furnace as required by code
6. Verify polarity: Ensure proper hot/neutral/ground connections

Startup & Commissioning

Initial startup and performance verification.

1. Restore power: Turn on electrical disconnect
2. Open gas valve: Slowly open main gas supply
3. Set thermostat: To heating mode above room temperature
4. Verify ignition: Observe ignition sequence and flame
5. Check airflow: Measure temperature rise (35-65°F typical)
6. Test safety controls: Verify limit switch and pressure switch operation
7. Program thermostat: Set heating cycles and fan operation

CAUTION! Never bypass safety controls. Replace if faulty.

Maintenance Schedule

Recommended maintenance intervals.

Troubleshooting Guide

Reset: Power cycle unit to clear temporary faults.

Service: Contact authorized Armstrong dealer for professional service.