Dettson Oil Furnace Manual

The Dettson Oil Furnace is a high-efficiency heating system designed for residential and light commercial use. Featuring advanced combustion technology, reliable oil-fired operation, built-in safety controls, adjustable thermostat compatibility, and energy-efficient performance. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Combustion chamber, oil burner assembly, heat exchanger, blower motor, thermostat connections, safety controls, fuel pump, and filter system.

Feature	Description
Combustion Chamber	High-temperature refractory lined for efficient burning
Oil Burner Assembly	Precision nozzle and electrode system for reliable ignition
Heat Exchanger	Stainless steel construction for maximum heat transfer
Blower Motor	Variable speed for optimal air circulation
Thermostat Connections	Compatible with standard 24V heating thermostats
Safety Controls	High limit switch, flame rollout protection, pressure switch
Fuel Pump	Single or two-stage pump for consistent oil delivery
Filter System	Replaceable fuel filter for clean oil supply
Ignition System	High-voltage electronic ignition
Exhaust Vent	Flue pipe connection for combustion gases

Installation

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

Position furnace: Place on stable, level surface with adequate clearance from combustible materials.
Connect fuel supply: Install oil line with proper shut-off valve and filter.
Electrical connections: Connect to 120V power supply and thermostat wiring.
Vent system: Install proper flue pipe with correct slope and termination.
Air supply: Ensure adequate combustion air supply per local codes.

WARNING! Installation must be performed by qualified technician. Follow all local codes and regulations.

First-Time Setup

Complete installation verification before initial startup.

Fuel system check: Purge air from oil lines and check for leaks.
Electrical verification: Confirm proper voltage and thermostat connections.
Ventilation test: Verify draft and proper combustion air flow.
Initial startup: Follow lighting procedure and adjust burner settings.
Performance test: Monitor operation through complete heating cycle.

CAUTION! Never bypass safety controls. Test all safety functions before regular use.

Specifications

Heating Capacity: 85,000 - 150,000 BTU/hr
Fuel Type: No. 2 Heating Oil
Efficiency: 85% AFUE
Electrical: 120V AC, 60Hz
Burner Type: Pressure atomizing with electronic ignition
Air Delivery: Multi-speed blower with adjustable CFM
Controls: Integrated furnace controller with safety limits
Vent Requirements: Type B vent or approved equivalent
Dimensions: Varies by model (typical 24"W x 48"H x 28"D)
Weight: 150-250 lbs depending on model

Controls and Settings

Access control panel via front service door. Main controls: Power switch, thermostat connections, reset button, diagnostic lights.

Control Board: LED indicators for power, ignition, lockout status. Manual reset button for safety controls.

Temperature Settings: Adjust via external thermostat. Blower Settings: Adjust blower delay and speed taps. Burner Settings: Professional adjustment of air shutter and pump pressure. Safety Controls: High limit switch (auto-reset), flame rollout switch (manual reset), pressure switch (proves draft).

Fuel System Connection

Oil supply line requirements: Copper or steel tubing, proper sizing, adequate slope, leak-free connections.

Shut off main oil supply before working on fuel system.
Install oil filter with arrow pointing toward burner.
Bleed air from fuel lines using pump bleed port.
Check for leaks using approved methods.
Verify proper oil pressure at burner nozzle.

Tip: Use two wrenches when connecting fuel lines to prevent damage to fittings.

Operating Procedures

Normal operation controlled by thermostat. Manual controls for service purposes.

Startup: Thermostat calls for heat, burner ignites after prepurge period.
Running: Monitor flame signal and operating temperatures.
Shutdown: Thermostat satisfied, burner shuts off, blower continues for post-purge.
Emergency stop: Use main power switch or thermostat off position.
Reset procedure: Wait 5 minutes after lockout before pressing reset button.

WARNING! Never attempt to restart repeatedly without identifying and correcting the problem.

Maintenance Schedule

Annual professional maintenance recommended. Regular homeowner maintenance tasks.

Frequency	Task	Description
Monthly	Filter check	Inspect and replace air filter as needed
Seasonal	Visual inspection	Check for leaks, corrosion, blockages
Annual	Professional service	Complete cleaning, nozzle replacement, efficiency test
Annual	Chimney inspection	Check vent system for obstructions and deterioration
As needed	Fuel filter	Replace when clogged or annually

Care & Cleaning

Turn off power before cleaning. Use soft brush and vacuum for heat exchanger. Compressed air for blower assembly.

CAUTION! Never use water or chemical cleaners on electrical components or heat exchanger surfaces.

Regulatory Information

UL certified for safety standards. Complies with ANSI Z21.47 for oil-fired appliances. CSA certified for Canadian standards. EPA compliant for emissions. For technical support, contact Dettson Customer Service at 1-800-555-HEAT or visit www.dettson.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No heat	Power loss, thermostat, safety lockout	Check power supply, thermostat setting, reset button
Burner won't ignite	No fuel, ignition failure	Check oil supply, bleed air, inspect electrodes
Frequent cycling	Dirty filter, restricted airflow	Replace air filter, check vents and registers
Smoke or odor	Dirty burner, poor combustion	Clean heat exchanger, adjust air/fuel ratio
Unusual noises	Motor bearings, loose parts	Lubricate if applicable, tighten mounting hardware

Reset Procedure: Wait 5 minutes, press reset button once. If problem persists, call for service.

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