Domestic 16,000 BTU Furnace Manual

The Domestic 16,000 BTU Furnace is a high-efficiency heating unit designed for residential use, featuring 16,000 BTU heating capacity, electronic ignition, variable-speed blower, multi-position installation capability, digital thermostat compatibility, safety shut-off systems, and energy-efficient operation. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: High-efficiency heat exchanger, electronic ignition system, variable-speed blower motor, multi-position installation capability, digital control board, safety switches, and filter access panel.

Feature	Description
Heating Capacity	16,000 BTU output for efficient heating
Electronic Ignition	Reliable spark ignition system
Variable-Speed Blower	Adjustable airflow for comfort and efficiency
Multi-Position	Upflow, downflow, or horizontal installation
Digital Control Board	Microprocessor-controlled operation
Safety Switches	Rollout and limit switches for protection
Filter Access	Easy-access filter compartment
Gas Connection	1/2" NPT gas line connection
Electrical Connection	120V AC, 60Hz power requirement
Vent Connection	3" PVC venting system

Installation

Unpack and inspect contents. Ensure proper clearances and ventilation.

Position furnace: Select upflow, downflow, or horizontal orientation with proper clearances.
Connect gas line: Use 1/2" black iron pipe with proper sealant; pressure test for leaks.
Connect electrical: 120V AC power supply with proper grounding.
Connect venting: Install 3" PVC vent pipes according to local codes.
Connect thermostat: Low-voltage wiring to R, W, G, C terminals.

WARNING! Installation must be performed by qualified technician. Gas leaks can cause explosion. Ensure proper ventilation.

First-Time Setup

Power on furnace; follow startup sequence.

Set thermostat: Install batteries; set to desired temperature.
Check gas supply: Ensure gas valve is open; verify pressure.
Test ignition: Turn thermostat above room temperature; observe startup sequence.
Adjust blower speed: Set appropriate CFM for your duct system.
Verify operation: Check for proper heating and airflow.

CAUTION! Do not bypass safety devices. Test carbon monoxide detectors.

Specifications

Heating Capacity: 16,000 BTU/H
Efficiency: 80% AFUE
Gas Type: Natural Gas (convertible to LP)
Gas Pressure: 3.5" WC natural gas
Electrical: 120V AC, 60Hz, 2.5 amps
Blower Motor: Variable-speed ECM
Airflow: 400-800 CFM adjustable
Vent Size: 3" PVC
Dimensions: 17.5" W x 21" D x 34" H
Weight: 85 lbs

Controls and Settings

Access control board via front panel. Integrated control module with status LED indicators.

Control Board: Power switch, status LED, diagnostic codes, blower speed taps, gas valve connection.

Temperature Control: Digital thermostat with programmable settings. Blower Settings: Multiple speed taps for heating operation. Safety Controls: Limit switches, rollout switches, pressure switch. Diagnostic Codes: LED flash patterns for troubleshooting.

Connecting Thermostat

Standard 5-wire thermostat connection: R (24V), W (heat), G (fan), Y (cool), C (common).

Turn off power to furnace before wiring.
Route thermostat wire from furnace to thermostat location.
Connect wires to corresponding terminals on control board.
Connect matching wires at thermostat base.
Restore power; test operation.

Tip: Use 18-gauge thermostat wire for best performance.

Operating the Furnace

Automatic operation with thermostat control.

Set temperature: Adjust thermostat to desired setting.
Startup sequence: Control board checks safety devices, activates inducer, checks pressure switch, ignites burner.
Heating cycle: Gas valve opens, main burner ignites, blower activates after heat exchanger warms.
Shutdown: Thermostat satisfied, gas valve closes, blower continues for cool-down period.
Fan operation: Use thermostat fan setting for continuous or auto operation.

WARNING! Never operate without filter. Keep combustible materials away from furnace.

Maintenance Features

Self-diagnostic system with LED status codes. Easy-access filter compartment. Removable blower assembly for cleaning.

Care & Cleaning

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

CAUTION! Do not attempt internal repairs without qualified technician. Keep area around furnace clear.

Regulatory Information

ANSI Z21.47: Certified for natural gas operation. UL listed. Meets national safety standards. For support, contact Domestic Heating at 1-800-555-HEAT or visit www.domesticheating.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat setting; replace batteries.
No heat	Gas supply/ignition	Check gas valve; observe ignition sequence; check for error codes.
Blower not working	Motor/control	Check blower door switch; verify control board power; check motor capacitor.
Short cycling	Filter/overheating	Replace dirty filter; check airflow restrictions; verify limit switch.
Unusual noises	Mechanical issues	Check for loose components; inspect blower wheel; verify motor bearings.

Reset: Turn power off for 30 seconds, then restore.

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