PORTABLE FORCED AIR HEATERS

SERVICE

PROCEDURES

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

Upper Shell Removal

1.Remove screws and lock washers along each side of heater using 5/16" nut- driver. These screws attach upper and lower shells together.

2.Lift upper shell off.

3.Remove fan guard.

Fuel Filter

(35/50/70,000 Btu/Hr Models)

1.Remove side cover screws using 5/16" nut-driver.

2.Remove side cover.

3.Pull rubber fuel line off fuel filter neck.

4.Carefully pry bushing and fuel filter out of fuel tank.

5.Wash fuel filter with clean fuel and re- place in tank.

6.Attach rubber fuel line to fuel filter neck.

7.Replace side cover.

Fuel Filter

(100/150,000 Btu/Hr Models)

1.Remove side cover screws using 5/16" nut-driver.

2.Remove side cover.

3.Pull upper fuel line off fuel filter neck.

4.Carefully pry bushing, lower fuel line, and fuel filter out of fuel tank.

5.Wash fuel filter with clean fuel and re- place in tank.

6.Attach upper fuel line to fuel filter neck.

7.Replace side cover.

Upper Shell

Upper

 

Shell

 

Fan

 

Guard

Fan

Guard

Figure 7 - Upper Shell Removal, 35/50/

Figure 8 - Upper Shell Removal, 100/

70,000 Btu/Hr Models

150,000 Btu/Hr Models

Fuel Filter

 

Side Cover

Fuel Line

Figure 9 - Fuel Filter Removal, 35/50/70,000 Btu/Hr Models

Fuel Filter, Bushing,

and Lower Fuel Line

Upper Fuel

Line

Side Cover

Figure 10 - Fuel Filter Removal, 100/150,000 Btu/Hr Models

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Desa NTH70, NTH150, NTH50, NTH100, NTH35 owner manual Service Procedures, Upper Shell Removal, Fuel Filter

NTH35, NTH70, NTH100, NTH50, NTH150 specifications

Desa NTH series consists of exceptional products designed to meet diverse demands in various applications. With models including NTH150, NTH35, NTH70, NTH100, and NTH50, this series offers a range of specifications and capabilities that cater to both residential and commercial needs.

The NTH150 model is the flagship in the series, featuring a powerful performance with a high output capacity. This model excels in energy efficiency, making it an exemplary choice for users aiming to reduce operational costs while preserving peak performance. With advanced temperature control systems, the NTH150 provides consistent and reliable results in various environments.

Moving to the NTH35, this model is designed for smaller applications while still ensuring high efficiency. It is compact and user-friendly, making it an ideal choice for domestic use. The NTH35 incorporates intuitive controls that allow users to easily monitor and adjust settings, thus ensuring optimal performance that meets the specific needs of smaller spaces.

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The NTH100 is known for its adaptability in various settings. It features a sleek design and is equipped with the latest technological advancements, including smart connectivity options. Users can effortlessly integrate the NTH100 into their existing setups, allowing remote monitoring and control through a mobile app. This feature enhances convenience and operational efficiency.

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In summary, the Desa NTH series, comprising NTH150, NTH35, NTH70, NTH100, and NTH50, showcases a blend of innovation, efficiency, and ease of use. Each model is tailored to meet specific needs while providing advanced features and technologies that enhance performance and functionality. Users can confidently select a model from this series, knowing that they are investing in reliable, high-quality products that will stand the test of time.