amana air command hi efficiency 90 gas furnace manual

The Amana Air Command Hi Efficiency 90 Gas Furnace is a high-efficiency residential heating system with AFUE ratings up to 90%, featuring a durable heat exchanger, electronic ignition system, variable-speed blower motor, multi-speed operation, and built-in diagnostic controls. Designed for natural gas operation with LP conversion capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Durable heat exchanger, electronic hot surface ignition, variable-speed blower motor, multi-speed operation, built-in diagnostic LED, pressure switch, flame sensor, gas valve.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in approved location with proper clearances and combustion air.
2. Venting: Use approved PVC or CPVC vent pipe per manufacturer specifications.
3. Gas Supply: Connect to properly sized gas line with sediment trap.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Ductwork: Ensure proper return and supply duct sizing.

WARNING! Gas furnaces produce carbon monoxide; proper venting is critical. Installation must comply with all local codes.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Set manifold pressure to specifications (3.5" WC natural gas).
3. Blower speed: Set appropriate blower speeds for heating mode.
4. System check: Test ignition sequence, flame rectification, and safety controls.
5. Commissioning: Verify proper operation and explain operation to homeowner.

CAUTION! Only qualified HVAC technicians should perform initial startup and adjustment.

Specifications

• AFUE Rating: Up to 90%
• Input BTU/H: 40,000 - 120,000 (varies by model)
• Gas Type: Natural gas (convertible to LP)
• Electrical: 120V AC, 60Hz
• Blower Motor: Variable-speed ECM
• Venting: PVC/CPVC sidewall or vertical
• Ignition: Hot surface electronic ignition
• Controls: Integrated furnace controller with diagnostics
• Warranty: Limited lifetime heat exchanger, 10-year parts
• Operating Temp Range: Standard residential applications

Controls and Settings

Integrated furnace control board with diagnostic LED. Thermostat connections: R, W, G, Y, C.

Control Board Features: Status LED, dip switch settings, terminal connections, reset button.

Blower Speeds: Multi-speed settings for heating and continuous fan modes. Gas Valve: Manifold pressure adjustment. Limit Controls: High temperature safety limits. Pressure Switch: Verifies inducer operation. Flame Sensor: Monitors burner operation.

Venting and Combustion Air

Direct vent or conventional venting options available.

1. Direct Vent: Use approved PVC pipe for intake and exhaust.
2. Conventional Vent: Metal B-vent for vertical applications.
3. Combustion Air: Ensure adequate fresh air supply per local codes.
4. Vent Termination: Maintain proper clearances from windows and openings.

Tip: Vent pipes must be properly supported and sealed to prevent condensation issues.

Operating Instructions

Normal operation controlled by thermostat.

1. Thermostat Setting: Set to HEAT mode and desired temperature.
2. Startup Sequence: Inducer motor starts, pressure switch closes, ignition begins.
3. Heating Cycle: Gas valve opens, burners ignite, blower starts after warm-up delay.
4. Shutdown: Gas valve closes, inducer continues for post-purge, blower continues cool-down.
5. Continuous Fan: G terminal energizes blower for air circulation only.

WARNING! Never operate furnace without proper venting and combustion air. Install carbon monoxide detectors.

Maintenance Procedures

Annual maintenance by qualified technician recommended.

1. Air Filter: Replace every 1-3 months depending on usage.
2. Burners: Inspect and clean annually.
3. Heat Exchanger: Visual inspection for cracks or damage.
4. Vent System: Check for obstructions and proper drainage.
5. Blower Assembly: Clean blower wheel and housing.
6. Electrical: Check connections and component operation.

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

Safety Information

Carbon monoxide hazards: Ensure proper venting and combustion air. Gas leaks: Smell of gas requires immediate shutdown and professional service. Electrical safety: Disconnect power before servicing.

EMERGENCY SHUTDOWN: Turn off gas valve, disconnect electrical power, call qualified technician.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for US and Canada. UL listed. Complies with Department of Energy efficiency standards. Manufactured by Amana Heating & Air Conditioning. For support, contact 1-888-292-6262 or visit www.amana-hac.com.

Troubleshooting

Reset: Power cycle furnace to clear temporary lockouts.

Service: 1-888-292-6262; www.amana-hac.com