Carrier Furnace Weathermaker Infinity Parts Manual

The Carrier Weathermaker Infinity is a high-efficiency gas furnace system featuring variable-speed technology, modulating gas valve, Infinity System control, two-stage heating operation, durable heat exchanger, quiet operation, and advanced diagnostics. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Maintenance Procedures 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Variable-speed blower motor, modulating gas valve, Infinity control system, heat exchanger, igniter, flame sensor, pressure switches, inducer motor.

Feature	Description
Variable-speed blower	Provides precise airflow control for optimal comfort
Modulating gas valve	Adjusts gas flow in 1% increments for precise temperature control
Infinity System control	Advanced thermostat interface with system diagnostics
Two-stage heating	Operates at low stage for mild weather, high stage for cold weather
Heat exchanger	Stainless steel construction for durability and efficiency
Quiet operation	Insulated cabinet and variable-speed technology reduce noise
Advanced diagnostics	LED status codes for troubleshooting
Pressure switches	Safety devices to verify proper venting
Flame sensor	Detects burner flame for safe operation
Inducer motor	Removes combustion gases through vent system

Installation

Unpack and inspect all components. Ensure proper location and clearances.

Position furnace: Install on level surface with proper clearances to combustibles.
Connect gas line: Use approved gas piping and fittings; pressure test for leaks.
Connect electrical: Follow local codes; proper grounding required.
Connect vent system: Use approved vent materials; maintain proper slope.
Connect ductwork: Ensure proper sizing and sealing.
Connect thermostat: Use Infinity control system for full functionality.

WARNING! Gas furnaces produce carbon monoxide; proper venting is critical. Only qualified technicians should install.

First-Time Setup

Power on furnace; follow startup procedure.

Verify gas supply: Ensure gas valve is open and pressure is correct.
Check electrical: Verify proper voltage and grounding.
Startup sequence: System will perform self-check and begin operation.
Configure Infinity control: Set temperature preferences and schedules.
Test operation: Verify heating cycles and temperature control.
Check airflow: Ensure proper air delivery through registers.

CAUTION! Never bypass safety devices. Follow all startup procedures exactly.

Specifications

Heating Capacity: Various models from 40,000 to 120,000 BTU
Efficiency: Up to 98% AFUE
Stages: Two-stage heating operation
Blower Type: Variable-speed ECM motor
Gas Type: Natural gas or propane
Voltage: 120V AC, 60Hz
Control System: Carrier Infinity with advanced diagnostics
Vent Material: PVC or approved metal venting
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Access system via Infinity control thermostat. Status lights on control board indicate system operation.

Infinity Control: Temperature setting, fan control, system mode, schedule programming, system status, diagnostic codes.

Heating Settings: Temperature setpoint, fan operation (auto/on), system mode (heat/off), schedule programming. Advanced Settings: Dehumidification control, air filtration, system alerts, service reminders. Diagnostics: LED status codes, error history, system performance data.

Connecting Components

Gas line: 1/2" or 3/4" black iron pipe. Electrical: 120V dedicated circuit. Vent: PVC or metal. Thermostat: Infinity control communication wires.

Turn off gas and electrical power before connecting components.
Match connections to specifications (gas pressure, voltage, wire gauge).
Test all connections for leaks and proper operation.
Verify proper airflow through duct system.

Tip: Use approved pipe thread compound on gas connections. Follow local codes for all installations.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

Monthly: Check air filter; replace if dirty.
Seasonal: Inspect vent system for obstructions.
Annual: Professional inspection and cleaning recommended.
Clean flame sensor: Use fine sandpaper or steel wool.
Check heat exchanger: Inspect for cracks or damage.
Lubricate motor: Only if specified by manufacturer.
Test safety devices: Verify proper operation of pressure switches and limit controls.

WARNING! Turn off gas and electrical power before performing any maintenance. Only qualified technicians should service gas components.

Safety Features

Multiple safety systems: Flame rollout switches, high limit switches, pressure switches, igniter safety, gas valve safety shutoff.

Care & Cleaning

Turn off power before cleaning. Keep area around furnace clear. Clean or replace air filter regularly.

CAUTION! Do not use water or cleaning solvents on electrical components. Keep combustion air intake clear.

Regulatory Information

ANSI Z21.47: Certified for natural gas and propane operation. UL listed. Meets all applicable safety standards. Copyright © Carrier Corporation. For support, visit www.carrier.com or contact 1-800-CARRIER.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/gas/thermostat	Check circuit breaker; verify gas supply; check thermostat settings.
No heat	Ignition/system lockout	Check for error codes; reset system; verify flame sensor operation.
Short cycling	Dirty filter/airflow	Replace air filter; check for blocked vents or registers.
Blower not running	Motor/control issue	Check for error codes; verify blower door switch operation.
Error codes displayed	System fault	Reference error code chart in service manual; contact technician if needed.

Reset: Turn power off for 30 seconds then restore. Check error codes on Infinity control.

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