Intertherm Oil Furnace Manual

The Intertherm Oil Furnace is a high-efficiency heating system designed for residential use, featuring oil-fired combustion technology, integrated safety controls, adjustable heat output, and compatibility with standard HVAC ductwork. 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. Connecting Components 7. Operating Procedures 8. Safety Features 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Oil burner assembly, heat exchanger, blower motor, combustion chamber, oil pump, safety controls, thermostat connection.

Feature	Description
Oil burner	High-efficiency nozzle-type burner for clean combustion
Heat exchanger	Stainless steel construction for durability and heat transfer
Blower motor	Variable speed for optimal air circulation
Combustion chamber	Refractory lined for maximum heat retention
Oil pump	Positive displacement pump for consistent fuel delivery
Safety controls	Includes high-limit switch, pressure switch, and flame sensor
Thermostat connection	Standard 24VAC for compatibility with most thermostats
Power switch	Main power control for service and safety
Reset button	Manual reset for safety lockouts
Indicator lights	LED status indicators for operational modes

Installation

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

Position furnace: Place on stable, level surface with adequate clearance.
Connect oil supply: Install oil line with proper filtration and shutoff valve.
Electrical connections: Connect to 120V AC power supply with proper grounding.
Ductwork: Connect supply and return air ducts according to local codes.
Ventilation: Install flue pipe with proper draft and clearance to combustibles.

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

First-Time Setup

Initial startup and system configuration.

Oil system priming: Fill oil lines and bleed air from system.
Thermostat connection: Connect and configure compatible thermostat.
Combustion adjustment: Set fuel-air ratio for optimal efficiency.
Safety check: Verify all safety controls are functioning properly.
Test operation: Run through complete heating cycle to verify performance.

CAUTION! First startup must be performed by qualified technician. Ensure proper ventilation during testing.

Specifications

Heating Capacity: 85,000 - 150,000 BTU/hr
Fuel Type: No. 2 heating oil
Efficiency: 85% AFUE
Electrical: 120V AC, 60Hz, 5-8 amps
Blower Capacity: 800-1400 CFM
Oil Pressure: 100-150 PSI
Dimensions: Varies by model (typically 24"W x 48"H x 28"D)
Weight: 150-250 lbs
Operating Temp: Up to 400°F combustion chamber

Controls and Settings

Primary controls located on integrated control board. Secondary controls accessible via service panel.

Control Board: Power switch, reset button, indicator lights, diagnostic codes.

Temperature Settings: Adjustable via thermostat. Fan Control: Auto/Manual modes with adjustable delay. Safety Settings: High-limit temperature, pressure differential, flame detection. Service Settings: Burner timing, ignition sequence, fan operation parameters.

Connecting Components

Oil supply line, electrical power, thermostat, ductwork, ventilation system.

Turn off power and oil supply before making connections.
Match oil line size to furnace requirements (typically 3/8").
Use proper electrical conduit and wire sizing per local codes.
Ensure thermostat wiring is correct and secure.
Verify duct connections are sealed and supported.

Tip: Label all connections for future service and maintenance.

Operating Procedures

Normal operation and seasonal startup/shutdown.

Startup: Ensure thermostat is set to desired temperature.
Automatic operation: System will cycle based on thermostat demand.
Manual operation: Use service switch for testing and maintenance.
Shutdown: Turn thermostat to lowest setting or use main power switch.
Seasonal shutdown: Follow proper procedures for extended non-use periods.

WARNING! Do not attempt to override safety controls. Contact qualified technician for any operational issues.

Safety Features

Multiple safety systems to prevent hazardous conditions. High-limit switch: Shuts down burner if temperature exceeds safe limits. Pressure switch: Verifies proper draft before ignition. Flame sensor: Confirms burner ignition within safety time limit. Manual reset: Requires manual intervention after safety lockout.

Maintenance & Cleaning

Regular maintenance essential for safe and efficient operation.

Annual professional service: Complete inspection and cleaning.
Filter replacement: Change air filters every 1-3 months.
Nozzle replacement: Replace oil burner nozzle annually.
Heat exchanger cleaning: Remove soot and debris buildup.
Blower maintenance: Clean and lubricate as needed.

CAUTION! Always disconnect power before performing any maintenance. Use only approved cleaning materials.

Regulatory Information

UL listed and certified to ANSI standards for oil-fired central furnaces. Complies with EPA regulations for residential heating equipment. Installation must meet NFPA 31 standards for oil burning equipment. For technical support, contact Intertherm customer service at 1-800-INTERTHERM or visit www.intertherm.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No heat	Power loss, thermostat issue	Check circuit breaker, verify thermostat settings, check for safety lockout.
Burner won't ignite	No fuel, ignition failure	Check oil supply, verify nozzle condition, inspect ignition system.
Short cycling	Dirty filter, high limit	Replace air filter, check for restricted airflow, verify high limit setting.
Excessive noise	Dirty burner, motor issues	Clean combustion chamber, inspect blower motor and bearings.
Smoke or odor	Improper combustion	Check fuel-air ratio, clean heat exchanger, verify proper draft.

Reset Procedure: Press reset button once; if unit locks out again, contact technician.

Service: 1-800-INTERTHERM; www.intertherm.com