Carrier Infinity 96 Gas Furnace Manual

The Carrier Infinity 96 Gas Furnace is a high-efficiency residential heating system featuring up to 96% AFUE rating, variable-speed blower motor, two-stage gas valve operation, advanced diagnostics, quiet operation, and compatibility with Carrier Infinity System Control. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Two-stage gas valve, variable-speed ECM blower motor, stainless steel heat exchanger, integrated control board, pressure switches, ignition system, and filter access.

Installation

Unpack and inspect all components. Ensure proper location with adequate clearance.

1. Position furnace: Place on stable, level surface with proper clearances (minimum 1" sides, 6" front).
2. Connect gas supply: Use black iron pipe with proper thread sealant; pressure test for leaks.
3. Connect electrical: 120V AC power supply with proper grounding; install disconnect switch.
4. Connect venting: Use PVC pipe for intake and exhaust; maintain proper slope and clearances.
5. Connect thermostat: Use 18-gauge thermostat wire; connect to control board terminals.
6. Connect ductwork: Secure supply and return ducts with proper sealing.

WARNING! Gas furnaces must be installed by qualified HVAC technicians only. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Power on furnace; follow startup sequence and system configuration.

1. Verify gas connections: Check for leaks using soap solution; ensure gas valve is open.
2. Power up: Turn on electrical power; observe control board LED status.
3. Configure thermostat: Set up Infinity Control or compatible thermostat.
4. Test operation: Initiate heating cycle; verify proper ignition and flame.
5. Check airflow: Verify proper airflow through supply registers.
6. Set blower speeds: Adjust dip switches for proper CFM based on duct static pressure.

CAUTION! Never bypass safety controls. Ensure proper combustion air and venting before operation.

Specifications

• Model Series: Carrier Infinity 96
• AFUE Rating: Up to 96%
• Heating Capacity: 40,000 to 120,000 BTU/h
• Stages: Two-stage heating operation
• Blower Type: Variable-speed ECM
• Voltage: 120V AC, 60Hz
• Gas Type: Natural gas (LP conversion kit available)
• Venting: PVC pipe (2" minimum)
• Filter Size: 16x25x1 standard
• Sound Level: As low as 65 dBA
• Warranty: 20-year heat exchanger, 10-year parts

Controls and Settings

Access system settings via Infinity Control thermostat or control board dip switches.

Infinity Control: System mode, temperature setpoint, fan operation, system status, diagnostics, advanced settings.

Control Board: LED status lights (power, error codes), dip switches (blower speeds, heating stages), test terminals. Heating Settings: Two-stage operation, temperature rise adjustment, blower delay. Fan Settings: Continuous fan speed, heating fan speed, cooling fan speed. Advanced: Dehumidification control, air cleaner operation, UV lamp control.

Connecting Thermostat

Compatible with Carrier Infinity Control and most standard thermostats.

1. Turn off power to furnace at disconnect switch.
2. Remove existing thermostat and note wire connections.
3. Run new 18-gauge thermostat wire if needed (minimum 5-conductor for Infinity).
4. Connect wires to control board: R (power), C (common), W/W1/W2 (heat), G (fan), Y/Y1/Y2 (cool).
5. Mount new thermostat and restore power.
6. Configure thermostat for furnace type and stages.

Tip: For optimal performance, use Carrier Infinity Control thermostat for full feature access.

Operating Modes

Multiple operating modes for comfort and efficiency.

1. Heating Mode: Two-stage operation with variable-speed blower.
2. Fan Only: Continuous or intermittent fan operation.
3. Standby: System ready but not actively heating.
4. Diagnostic Mode: Service technician access for system testing.
5. Dehumidification: Reduces humidity during cooling operation.
6. Air Cleaning: Coordinates with electronic air cleaner.

WARNING! Do not attempt to operate furnace if you smell gas. Evacuate immediately and call gas company.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter as needed.
2. Seasonal: Inspect vent pipes for obstructions or damage.
3. Annual: Professional inspection and cleaning.
4. Blower compartment: Clean annually; check motor and wheel.
5. Burners: Inspect for proper flame pattern and cleanliness.
6. Heat exchanger: Visual inspection for cracks or corrosion.
7. Drain system: Clear condensate drain lines and trap.

Care & Cleaning

Turn off power before any cleaning. Use soft brush and vacuum for internal components.

CAUTION! Never use water or liquid cleaners on electrical components. Keep combustion area clear of dust and debris.

Regulatory Information

UL listed; ANSI Z21.47 compliant; meets DOE energy efficiency standards. Manufactured by Carrier Corporation. For technical support, contact Carrier at 1-800-CARRIER or visit www.carrier.com. Installation must comply with local building codes and NFPA 54 (National Fuel Gas Code).

Troubleshooting

Reset: Turn power off for 30 seconds, then restore. For persistent issues, contact professional service.

Service: 1-800-CARRIER; www.carrier.com