Brentwood Furnace Manual

The Brentwood Furnace is a high-efficiency gas furnace designed for residential heating applications. Featuring advanced combustion technology, variable-speed blower motor, electronic ignition system, multiple heat stages, and smart thermostat compatibility. 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 Thermostat 7. Operating Modes 8. Safety Features 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-efficiency heat exchanger, variable-speed blower, electronic ignition, pressure switches, flame sensor, gas valve, filter compartment.

Feature	Description
Heat Exchanger	Stainless steel construction for maximum efficiency
Blower Motor	Variable-speed ECM motor for quiet operation
Ignition System	Electronic hot surface ignition
Gas Valve	Modulating gas valve for precise temperature control
Filter Compartment	Standard 1-inch or 4-inch media filter compatible
Pressure Switches	Safety switches for combustion air verification
Flame Sensor	Monitors burner flame presence
Control Board	Microprocessor-based for system monitoring
Thermostat Connections	Standard 24V connections for compatible thermostats
Service Light	LED indicator for maintenance alerts

Installation

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

Location selection: Choose well-ventilated area with proper clearances (24" front, 6" sides, 6" rear).
Gas line connection: Use approved gas piping; pressure test for leaks.
Vent piping: Install PVC vent pipes according to local codes.
Electrical connection: Connect 120V power supply and thermostat wiring.
Ductwork: Connect supply and return ducts securely.

WARNING! Installation must be performed by qualified HVAC technician. Gas leaks can cause explosion or fire.

First-Time Setup

Power on furnace; follow startup sequence.

Gas pressure adjustment: Verify and adjust manifold pressure per specifications.
Blower speed settings: Set appropriate speeds for heating mode.
Thermostat configuration: Program heating schedules and temperature settings.
System testing: Run through complete heating cycle to verify operation.
Safety checks: Verify all safety controls are functioning properly.

CAUTION! Never bypass safety controls. Ensure proper combustion air supply.

Specifications

Heating Capacity: 40,000 - 120,000 BTU/h (model dependent)
Efficiency: 80% - 96% AFUE
Gas Type: Natural gas or LP (conversion kit required)
Electrical: 120V AC, 60Hz, 15A circuit
Blower Motor: Variable-speed ECM
Heat Stages: Single-stage, two-stage, or modulating
Vent Material: PVC approved for Category IV
Dimensions: Varies by model (typical: 21"W x 21"D x 45"H)
Warranty: 10-year heat exchanger, 5-year parts

Controls and Settings

Access control board via front panel. Status lights indicate system operation.

Control Board: POWER switch, STATUS LED, DIP switches for configuration.

Temperature Control: Set via compatible thermostat. Blower Settings: Adjust speeds for heating operation. Gas Pressure: Factory set; verify during installation. Safety Controls: Pressure switches, flame sensor, rollout switches, high-limit switch. Diagnostic Codes: LED flash patterns indicate specific error conditions.

Connecting Thermostat

Standard 24V thermostat connections: R (power), W (heat), G (fan), C (common), Y (cooling).

Turn off power to furnace before wiring.
Connect thermostat wires to control board terminals.
Match wire colors to terminal labels.
Select thermostat type in DIP switch settings if required.

Tip: Use compatible programmable or smart thermostat for optimal performance.

Operating Modes

Heating operation controlled by thermostat.

Standby Mode: System ready, awaiting thermostat call for heat.
Ignition Sequence: Inducer motor starts, pressure switch verifies, igniter heats, gas valve opens.
Heating Mode: Burners ignite, blower starts after heat exchanger warms.
Fan Operation: Continuous or automatic fan modes available.
Shutdown: Gas valve closes, blower continues for cool-down period.

WARNING! Never operate furnace with access panels removed. Keep combustible materials away.

Safety Features

Flame Rollout Switches: Detect improper burner flames. High Limit Switch: Prevents overheating. Pressure Switches: Verify proper venting. Flame Sensor: Ensures gas valve only opens when flame present. Ignition Lockout: Prevents repeated ignition attempts.

Maintenance & Cleaning

Turn off power and gas supply before maintenance. Replace air filter monthly during heating season. Annual professional inspection recommended.

CAUTION! Do not attempt to clean heat exchanger. Keep vents and combustion air openings clear.

Regulatory Information

ANSI Z21.47: Certified for gas-fired central furnaces. UL 1995: Standard for heating and cooling equipment. CSA International: Approved for US and Canadian markets. For support, visit www.brentwoodhvac.com or contact 1-800-555-HEAT.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat settings; ensure door switch engaged.
No heat	Gas supply/ignition	Verify gas valve on; check pilot/igniter; inspect flame sensor.
Short cycling	Filter/limit switch	Replace dirty filter; check high limit switch; verify proper airflow.
Blower not working	Motor/capacitor	Check blower motor; test capacitor; verify control board signals.
Unusual noises	Mechanical issues	Inspect inducer motor; check for loose components; verify ductwork.

Reset: Power cycle furnace; check status lights for error codes.

Service: 1-800-555-HEAT; www.brentwoodhvac.com