THEORY OF OPERATION

The Fuel System: The hose/regulator assembly attaches to the propane gas supply. The propane gas moves through the solenoid valve and out the nozzle.

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 direct spark ignitor (DSI) sends voltage to the ignitor. The ignitor ignites the fuel and air mixture.

The Safety Control System: This system causes the heater to shut down if the flame goes out. The motor will continue to run, but no heat is produced.

Clean Heated Air Out (Front)

Combustion Chamber

Ignitor

Fan Motor

Cool Air In (Back)

DSI

Power Cord

 

Air For Combustion

 

Air For Heating

Nozzle

 

 

Air For Combustion

Solenoid Valve

Hose/

Regulator

Air For Heating

Assembly

 

Figure 2 - Cross Section Operational View

PROPANE SUPPLY

Propane/LP gas and propane/LP tank(s) are to be furnished by the user.

Use this heater only with a propane/LP vapor withdrawal supply system. See Chapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58 and the Propane Installation Code CAN/CGA B149.2. Your lo- cal library or fire department will have these booklets.

The amount of propane/LP gas ready for use from propane/LP tanks varies. Two factors decide this amount:

1.The amount of propane/LP gas in the tank(s)

2.The temperature of tank(s)

The chart below shows the number of 100-pound tanks needed to run this heater.

Do not operate this product with any tank smaller than 100 pounds.

Temperature

Number

at tank location

of tanks

40° F (5° C) and above

2

Below 40° F (5° C)

(Use larger tank)

Less gas is vaporized at lower temperatures. You may need a larger tank in colder weather. Your local propane/LP gas dealer will help you select the proper supply system. The minimum sur- rounding air temperature rating for each heater is -20°F (-7° C).

VENTILATION

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.

Provide a fresh air opening of at least three square feet for each 100,000 Btu/Hr (105,500 k/j) rating. This heater requires a fresh air opening of at least

11.25square feet (1.05 m2). Provide extra fresh air if more heaters are being used.

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Desa SBLP375AT, 375-F owner manual Propane Supply, Amount of propane/LP gas in the tanks Temperature of tanks

375-F, SBLP375AT specifications

Desa 375-F and SBLP375AT are innovative heating solutions designed to provide efficient and effective warmth in residential and commercial environments. These models stand out for their technological advancements, energy efficiency, and user-friendly features that cater to modern heating needs.

The Desa 375-F is primarily known for its powerful heating capabilities. It boasts a high efficiency rating, which means it can produce significant heat output while consuming less fuel. This efficiency not only translates to lower energy bills for users but also reduces the carbon footprint associated with heating. The unit is designed for easy installation and maintenance, making it an ideal choice for both new constructions and retrofits.

One of the standout features of the Desa 375-F is its adjustable thermostat, allowing users to set and maintain their desired temperature effortlessly. This feature contributes to comfort while also preserving energy, as the heating system can be programmed to operate only when needed. Additionally, the model incorporates a reliable safety shut-off mechanism that enhances user safety by preventing overheating.

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