Sunfire SF120 - User Manual

Questions and Answers

R
robertcombsJul 29, 2025
How to troubleshoot a Sunfire SF120 Electric Heater that will not start?
- J
  Jose ChoiJul 29, 2025
  If your Sunfire Electric Heater doesn't start, first check the main electrical power circuit breaker or fuse. If it's tripped or blown (and the AMBER light is off), reset the breaker or replace the fuse. If power is present but the AMBER light is still off, replace the bulb. Also, check if the primary control safety has tripped (RED light illuminated) or if the primary control is defective; in this case, reset or test the components, replacing them if necessary. Ensure the thermostat jumper is securely connected or, if using a thermostatic control, ensure it is properly connected and set to call for heat. Finally, check the tip switch to be sure that the Sunfire unit is level, and if it is level, the tip switch may be defective.
W
wrightmatthewAug 4, 2025
What to do if Sunfire Electric Heater attempts to fire but does not establish a flame?
- T
  Tyler McdanielAug 5, 2025
  If your Sunfire Electric Heater attempts to fire but doesn't establish a flame, the following could be the reason: * The unit may not be primed: Use the PRIME switch to fill the fuel system. * There may be a clogged nozzle: Replace the nozzle. * The fuel filter may be dirty: Change the fuel filter. * There may be an air bubble in the fuel line: Use the PRIME switch to clear the fuel system of air. * There may be a suction leak: Tighten all fuel-pickup pipe fittings and make sure the fuel filter is tightened snugly to the filter head. * The ignition system may be defective: Replace the defective component.
C
Cynthia MaldonadoAug 9, 2025
Why does my Sunfire Electric Heater fire and then persistently fails after 30 seconds?
- T
  Trevor JohnsonAug 10, 2025
  If your Sunfire Electric Heater fires and then persistently fails after 30 seconds, it could be due to a dirty fuel filter, which requires changing the fuel filter. Alternatively, the nozzle may be clogged, requiring replacement. Another potential cause is a contaminated fuel supply, which can be resolved by draining the tank from the plug, cleaning it, and refilling with clean fuel. Finally, there might be an improper power supply; check the power supply and if using a generator, run it for 20 minutes and retry. If using an inverter, try a clean power supply or a different power supply.
T
Tiffany MorganAug 16, 2025
Why does my Sunfire SF120 Electric Heater have a small flame or low heat output?
- T
  tyler97Aug 16, 2025
  If your Sunfire Electric Heater has a small flame or low heat output, it could be due to a dirty fuel filter, which requires changing it, or a clogged nozzle, which requires replacing it. No answer.
J
Joann YoungAug 22, 2025
What to do if Sunfire Electric Heater fires and then persistently fails within 30 seconds?
- M
  masonrodneyAug 22, 2025
  If your Sunfire Electric Heater fires and then persistently fails within 30 seconds, the flame sensor may be dirty or defective. Clean the flame sensor with a soft, damp cloth. If the problem persists, replace the flame sensor.

Summary

Safety Information

Safety, Codes, and Regulations

Discusses safety, codes, and regulations for the product.

Conventions Used in Manual

Explains signal words and definitions used to identify hazards in the manual.

Safety Warnings and Precautions

Clearance, Electrical, and Flooring Safety

Warns about clearance, electrical shock hazards, and flooring requirements.

CO and Material Hazard Warnings

Details Carbon Monoxide dangers and precautions for ceramic fiber materials.

Fuel Safety Guidelines

Prohibited Fuel Types (No Gasoline)

Strongly warns against using gasoline and lists approved fuels like Diesel and Kerosene.

Safety Labels and Key Information

Read Manual Before Use

Emphasizes the importance of reading the manual before operating the heater.

Summary of Product Specifications

Provides a brief overview of key product specifications and warnings.

Key Features

Low Noise and Odorless Operation

Highlights the heater's ability to provide heat without excessive noise or fumes.

Zero Emissions and Breeze;Dust Control

Showcases the heater's clean operation and dust-free heating method.

Technical Specifications

Clearance, Weight, and Dimensions

Details minimum clearances, weight, and physical dimensions of the heater.

Getting Started: Identifying Parts

Heater Components Identification

Familiarizes users with the names and locations of various heater parts.

Getting Started: Package Contents

Included Heater Components List

Lists all items included in the heater package for assembly and setup.

Getting Started: Heater Assembly

Initial Assembly Steps

Provides the first set of instructions for assembling the SunFire heater unit.

Getting Started: Heater Assembly (Continued)

Attaching Feet and Axle Assembly

Details the steps for attaching the leveling feet and axle assembly to the heater.

Getting Started: Heater Assembly (Continued)

Uprighing and Guard Attachment

Covers uprighting the heater and attaching the dome guard.

Getting Started: Heater Assembly (Continued)

Visor and Optional Bracket Assembly

Explains how to attach the dome visor and the optional lifting bracket.

Normal Operation

Adjusting the Tilt Angle

Instructions on how to adjust the tilt angle of the heater's dome face.

Operating the Heater Handle

Guidance on raising and lowering the heater's handle for transport and use.

Normal Operation: Controls

Heater Controls Overview

Identifies and explains the function of the heater's control panel buttons and lights.

Heater Operation Procedure

Step-by-step instructions for starting, operating, and shutting down the heater.

Operation in Sub-Freezing Temperatures

Fuel Considerations for Cold Weather

Advises on fuel additives and heating bands for operation in freezing conditions.

Optional Accessories

Fuel-Filter Heating Band

Describes the installation and use of a heating band for the fuel filter.

Thermostatic Control Installation

Explains how to connect and use an external thermostat with the heater.

Maintenance & Service

Filter and Fuel Tank Servicing

Details procedures for servicing the fuel filter and tank annually or as needed.

Draining the Fuel Tank

Instructions on how to properly drain the heater's fuel tank for maintenance or storage.

Burner Service

Burner Assembly Inspection and Cleaning

Guides on inspecting and cleaning the burner assembly and flame sensor.

Burner Service (Continued)

Nozzle Subassembly Removal and Inspection

Instructions for removing the nozzle subassembly and inspecting the combustion chamber.

Burner Service (Continued)

Nozzle Replacement and Electrode Alignment

Details nozzle replacement and ensuring correct electrode alignment.

General Maintenance

Routine Heater Inspection and Cleaning

Advises on regular inspection of fasteners, connections, and general cleaning.

Flame Adjustment

Adjusting Heater Flame for Optimal Performance

Provides steps to adjust the air shutter and fuel pump for optimal flame.

Wiring Diagram (High Voltage)

High Voltage Electrical Connections

Illustrates the high voltage wiring schematic for the heater's components.

Wiring Diagram (Low Voltage)

Low Voltage Electrical Connections

Shows the low voltage wiring schematic for the heater's control systems.

Troubleshooting

Startup and Flame Issues

Addresses common problems like failure to start or establish a flame.

Operational and Performance Issues

Covers troubleshooting for smoke, low heat output, and flame problems.

Warranty & Legal Information

Heater Warranty Details

Outlines the terms and conditions of the SunFire heater warranty.

Product Registration and Trademarks

Information on registering the product and details about trademarks.

Sunfire SF120 Specifications

General

Brand	Sunfire
Model	SF120
Category	Electric Heater
Language	English

Sunfire SF120 - User Manual

Table of Contents

Questions and Answers

Summary

Safety Information

Safety, Codes, and Regulations

Conventions Used in Manual

Safety Warnings and Precautions

Clearance, Electrical, and Flooring Safety

CO and Material Hazard Warnings

Fuel Safety Guidelines

Prohibited Fuel Types (No Gasoline)

Safety Labels and Key Information

Read Manual Before Use

Summary of Product Specifications

Key Features

Low Noise and Odorless Operation

Zero Emissions and Breeze;Dust Control

Technical Specifications

Clearance, Weight, and Dimensions

Getting Started: Identifying Parts

Heater Components Identification

Getting Started: Package Contents

Included Heater Components List

Getting Started: Heater Assembly

Initial Assembly Steps

Getting Started: Heater Assembly (Continued)

Attaching Feet and Axle Assembly

Getting Started: Heater Assembly (Continued)

Uprighing and Guard Attachment

Getting Started: Heater Assembly (Continued)

Visor and Optional Bracket Assembly

Normal Operation

Adjusting the Tilt Angle

Operating the Heater Handle

Normal Operation: Controls

Heater Controls Overview

Heater Operation Procedure

Operation in Sub-Freezing Temperatures

Fuel Considerations for Cold Weather

Optional Accessories

Fuel-Filter Heating Band

Thermostatic Control Installation

Maintenance & Service

Filter and Fuel Tank Servicing

Draining the Fuel Tank

Burner Service

Burner Assembly Inspection and Cleaning

Burner Service (Continued)

Nozzle Subassembly Removal and Inspection

Burner Service (Continued)

Nozzle Replacement and Electrode Alignment

General Maintenance

Routine Heater Inspection and Cleaning

Flame Adjustment

Adjusting Heater Flame for Optimal Performance

Wiring Diagram (High Voltage)

High Voltage Electrical Connections

Wiring Diagram (Low Voltage)

Low Voltage Electrical Connections

Troubleshooting

Startup and Flame Issues

Operational and Performance Issues

Warranty & Legal Information

Heater Warranty Details

Product Registration and Trademarks

Sunfire SF120 Specifications