HIGH PRESSURE PORTABLE FORCED AIR HEATER 350,000 AND 600,000 BTU/HR

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 ig- nitor 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.

FUELS

WARNING: Use only kerosene or No. 1 fuel oil to avoid risk of fire or explosion. Never use gaso- line, naphtha, paint thinners, al- cohol, 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 re- quire you to clean fuel system often.

VENTILATION

WARNING: Follow the mini- mum fresh, outside air ventila- tion requirements. If proper fresh, outside air ventilation is not pro- vided, carbon monoxide poison- ing can occur. Provide proper fresh, outside air ventilation be- fore running heater.

Fresh Air Opening

Requirements

 

Square Feet

Heater Size

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.

 

 

 

Solenoid

Fuel Pump/

Combustion

 

Burner

Valve

Fuel Filter

Chamber

Spark

Fan

Motor

 

Plug

Head

 

 

 

 

 

 

 

 

Clean

 

 

 

 

Heated

 

 

 

 

Air Out

 

 

 

Cool

 

 

 

 

Air In

Fuel

Pickup

Line

Fuel Tank

Nozzle

Fuel Line To

Electronic Ignitor

Fuel

Solenoid Valve

Filter

 

 

 

Air for Combustion

Fuel

and Heating

 

Figure 3 - Cross Section Operational View

 

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Desa SB600D, SB350D owner manual Theory Operation, Fuels, Ventilation, Fresh Air Opening Requirements

SB350D, SB600D specifications

The Desa SB350D and SB600D are modern heating solutions designed to cater to both residential and commercial needs. These models showcase a blend of advanced technology and user-friendly features, making them reliable choices for efficient heating.

One of the standout features of the Desa SB350D and SB600D is their high efficiency. With advanced combustion technology, these units can achieve a notable thermal efficiency rating. This means that they convert a larger percentage of fuel into usable heat, reducing energy costs and minimizing environmental impact.

Both models are equipped with a robust safety system. The automatic shut-off mechanism is a key element, ensuring that the heater will turn off in case of overheating, providing peace of mind for users. Additionally, they incorporate a low oxygen safety shutoff, which will turn the unit off if oxygen levels drop below a safe threshold, making them suitable for use in various environments.

Another important characteristic of the Desa SB350D and SB600D is their versatility. These heaters can efficiently operate using multiple fuel sources, including propane and natural gas. This flexibility allows users to choose a fuel type that best suits their needs and availability. Furthermore, both models feature an adjustable thermostat that enables users to easily control the temperature, ensuring optimal comfort at all times.

Design plays a crucial role in the appeal of these units. The SB350D and SB600D come with a sleek and modern aesthetic that can seamlessly blend into various settings, from homes to commercial spaces. Their compact size allows for easy placement without sacrificing heating performance.

Installation is made effortless with these models. The Desa SB350D and SB600D come with detailed instructions and can be installed in a variety of configurations, including wall-mounted or freestanding options. This adaptability enhances their usability across different spaces.

In terms of durability, the construction of both units is solid, designed to withstand the rigors of daily use. Their materials are chosen for longevity, ensuring that users can rely on these heaters season after season.

Overall, the Desa SB350D and SB600D are exemplary choices for those seeking an efficient, versatile, and reliable heating solution. With their blend of safety features, fuel flexibility, and attractive design, they meet the demands of modern heating while providing exceptional performance.