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

SERVICE PROCEDURES

WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur. Only a qualified service person should service and repair heater.

Fan Blades and Air Deflectors

1.Remove upper shell (see column 1).

2.Clean fan blades and air deflectors with clean, soft cloth moistened with kero- sene or solvent (see Figure 6).

3.Dry fan blades and air deflectors thor- oughly.

4.Replace upper shell.

Air Deflector

Nozzle

1.

Remove upper shell (see column 1).

2.

Remove fuel line from solenoid valve

 

using 7/16" wrench.

3.

Remove spark plug wire from spark

 

plug.

4.

Remove spark plug from burner head

 

using 13/16" open-end wrench.

5.

Remove five screws using

 

5/16" nut-driver and remove burner

Upper Shell Removal

1.Remove screws along each side and top of heater using 5/16" nut-driver. These screws attach upper and lower shells together (see Figure 5).

2.Lift upper shell off.

 

head from combustion chamber.

6.

Place burner head into vise and lightly

 

tighten.

7.

Carefully remove nozzle from burner

 

head using 5/8" socket wrench (see Fig-

 

ure 9).

8.

Inspect nozzle for damage. If damaged

 

or clogged, replace nozzle.

9.

Make sure plug is in place on burner

Upper Shell

Figure 5 - Upper Shell Removal, 600,000 Btu/Hr Model

Fan Blade

Figure 6 - Fan Blades and Air Deflectors

Spark Plug

1.Remove upper shell (see column 1).

2.Remove spark plug wire from spark plug (see Figure 7).

3.Remove spark plug from burner head using 13/16"

open-end wrench (see Figure 7).

4.Replace spark plug if damaged or heavily coated with carbon.

5.Clean and regap spark plug electrodes to .075 inch (see Figure 8).

6.Install spark plug in burner head.

7.Attach spark plug wire to spark plug.

8.Replace upper shell.

Burner Head

Spark Plug

Spark

Plug Wire

Figure 7 - Spark Plug Removal

.075 inch

Figure 8 - Spark Plug Gap

 

head.

10.

Replace nozzle into burner head and

 

tighten firmly (175-200 inch-pounds).

11. Attach burner head to combustion

 

chamber.

12.

Install spark plug in burner head.

13.

Attach spark plug wire to spark plug.

14.

Attach fuel line to solenoid valve.

 

Tighten firmly.

15.

Replace upper shell.

Nozzle

Plug Spark

Plug

 

 

Spark

Burner

 

Plug

 

Wire

Head

 

 

Solenoid

 

Fuel

 

Valve

 

Line

 

 

Figure 9 - Replacing Nozzle

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Desa SB600D, SB350D owner manual Service Procedures, Fan Blades and Air Deflectors, Nozzle, Upper Shell Removal, Spark Plug

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.