Desa Tech HEATERS OWNER'S MANUAL Theory of Operation, Fuels, Fresh Air Opening Requirements

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THEORY OF OPERATION

The Fuel System: The motor turns the fuel pump. The fuel pump pulls fuel from the fuel tank. The fuel pump pushes fuel through a filter and a solenoid valve and out the burner head nozzle. A fine mist of fuel is sprayed into the combustion chamber.

The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

The Ignition System: The electronic ignitor sends voltage to the spark plug. The spark plug ignites the fuel and air mixture.

The Flame-Out Control System: This system causes the heater to shut down if the flame goes out. It also allows the fan to continue running after normal shutdown of heater. This cools the combustion chamber.

Burner

Solenoid

 

 

 

Combustion Chamber Spark Plug Head

Valve

Fan

Motor

Fuel Pump/

 

 

 

 

Fuel Filter

Clean

 

 

 

 

Heated

 

 

 

Cool

Air Out

 

 

 

 

 

 

Air In

 

 

 

 

 

 

 

Fuel Pickup

 

Nozzle

 

Line

 

 

 

 

 

 

Fuel

Fuel Tank

Fuel Line To

 

Filter

 

Electronic

 

Solenoid Valve

 

Ignitor

 

Air for

Fuel

 

Combustion

 

 

and Heating

 

 

 

Figure 3 - Cross Section Operational View

FUELS

VENTILATION

WARNING: Use only kero- sene or #1 fuel oil to avoid risk of fire or explosion. Never use gasoline, naphtha, paint thin- ners, alcohol or other highly flammable fuels.

Do not use heavy fuels such as No. 2 fuel oil or No. 2 diesel. Using heavy fuels will result in:

•clogged fuel filter and nozzle

•carbon build-up on spark plug

•the need of non-toxic anti-icer in fuel during very cold weather

IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage container is clean. Foreign matter such as rust, dirt or water will cause flame-out control to shut down heater. Foreign matter may also require you to clean fuel system often.

WARNING: Follow the mini-

mum fresh, outside air ventila-

tion requirements. If proper

fresh, outside air ventilation is

not provided, carbon monoxide

poisoning can occur. Provide

proper fresh, outside air ventila-

tion before running heater.

 

Fresh Air Opening Requirements

Heater Size

Square Feet Opening

350,000 Btu/Hr

10.5

600,000 Btu/Hr

18.0

Note: If you use more than one heater, provide extra

fresh air. Provide a fresh air opening of at least three

square feet for each 100,000 Btu/Hr rating.

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www.desatech.com

110098-01G

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Contents Table of Contents Safety Information Follow all local ordinances and codes when using heaterProduct Identification UnpackingFuels Theory of OperationFresh Air Opening Requirements Operation To Start HeaterTo Stop Heater To Restart HeaterSTORING, Transporting of Shipping Portable GeneratorPreventative Maintenance Schedule How Often How ToTroubleshooting Observed Problem Possible Cause RemedyDamaged electronic ignitor Pump Pressure Adjustment Service Procedures Upper Shell RemovalSpark Plug FAN Blades and AIR DeflectorsAdjusting Pump Pressure Pump Procedure if Pump is Binding Fuel LinesFuel Filters Tank Fuel FilterFor Heaters With Fuel Filter/Canister External To Pump For Heaters With Fuel Filter Internal To PumpMaintenance Kits Technical ServiceAccessory Replacement PartsIllustrated Parts Breakdown Models B350D, SB350D and R350AParts List NTC-4CModels B600D, SB600D and R600A NTC-4C Illustrated Parts Breakdown and Parts List Burner Head Assembly 350,000 and 600,000 BTU/HRNPF-5C Motor and Pump Assembly 350,000 and 600,000 BTU/HR For Heaters With Fuel Filter/Canister External To PumpWiring Diagram Specifications350,000 Btu/Hr Warranty and Repair Services Warranty Service

Tech HEATERS OWNER'S MANUAL specifications

Desa Tech heaters are renowned for their advanced heating solutions that combine efficiency, safety, and user-friendly features. This owner’s manual serves as a comprehensive guide to the main features, technologies, and characteristics of Desa Tech heaters, ensuring users can maximize their heating experience while maintaining optimal safety and performance.

One of the standout features of Desa Tech heaters is their innovative combustion technology, which allows for cleaner and more efficient burning of fuel. This not only maximizes heat output but also minimizes harmful emissions, making them an environmentally friendly choice. The heaters are designed to operate quietly, providing comfort without disruptive noise, which is perfect for living spaces and other environments where peace is vital.

Safety is a primary concern, and Desa Tech heaters come equipped with a variety of safety features. These include a reliable carbon monoxide monitor that alerts users to unsafe levels of this potentially lethal gas. Additionally, many models feature an automatic shut-off system that activates in the event of overheating or other irregular conditions. These safety mechanisms are crucial in preventing accidents and ensuring peace of mind during use.

Desa Tech heaters also employ advanced thermostatic control technology. This feature allows users to set their desired temperature, and the heater will automatically adjust its output to maintain that level. This not only provides comfort but also enhances energy efficiency, helping to reduce overall heating costs. Users can enjoy a warm atmosphere without the worry of excessive energy consumption.

Another notable characteristic is the portability of many Desa Tech heater models. Lightweight and designed with carry handles, these heaters are easy to move from room to room, providing versatile heating solutions throughout the home. Whether warming a living area, workshop, or garage, the convenience of a portable heater cannot be overstated.

Moreover, Desa Tech heaters are often designed for easy maintenance, with user-accessible filters and simple cleaning procedures. Regular maintenance ensures that the heater operates at peak efficiency and extends its lifespan.

In summary, the Desa Tech heater owner’s manual outlines the essential features and technologies that make these heating solutions a popular choice. With a focus on efficiency, safety, and user convenience, users can enjoy a warm and comfortable environment while minimizing their impact on the planet and keeping energy costs in check. By adhering to the guidelines in this manual, users can maximize the benefits of their Desa Tech heater for years to come.
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