OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

Spark Plug

(35,000 Btu/Hr Model)

1.

Remove upper shell (see page 8).

2.

Remove fan (see page 13).

3.

Remove fuel and air line hoses from

 

nozzle assembly.

4.

Remove spark plug wire from spark plug.

5.

Remove two screws using 5/16" nut-

 

driver and remove burner strap.

6.

Place hex-body of spark plug into vise

 

and tighten.

7.

Remove spark plug mounting nut us-

 

ing 11/16" open-end wrench.

8.

Remove burner strap from spark plug.

 

Spark Plug

Combustion

Mounting Nut

Chamber

Burner Strap

 

 

Spark Plug

 

Spark

 

Plug

 

Wire

Nozzle

Assembly

Air Line

Fuel Line

Hose

Hose

Figure 11 - Spark Plug Removal, 35,000 Btu/Hr Model

Bend Here to Adjust

Spark Plug

(50/70/100/150,000 Btu/Hr Models)

1.Remove upper shell (see page 8).

2.Remove fan (see page 13).

3.Remove spark plug wire from spark plug.

4.Remove spark plug from burner head using 13/16" open-end wrench.

5.Clean and regap spark plug electrodes as follows:

50/70/100,000 Btu/Hr Models:

1.9 mm (.075") gap

150,000 Btu/Hr Model:

2.8 mm (0.110") gap

6.Install spark plug in burner head.

7.Attach spark plug wire to spark plug.

8.Replace fan (see page 13).

9.Replace fan guard and upper shell.

9. Clean and regap spark plug electrodes

Gap

Burner

Spark

to 1.4 mm (.055") gap.

10. Replace burner strap onto spark plug.

Rotate burner strap to position spark

plug electrodes (see Figure 13).

11. Tighten spark plug with spark plug

1.4 mm (.055") Gap

Head

Plug Wire

 

mounting nut.

12.

Release hex-body of spark plug from

 

vise.

13.

Replace burner strap onto combustion

 

chamber.

14.

Attach spark plug wire to spark plug.

15.

Attach fuel and air line hoses to nozzle

 

assembly.

16.

Replace fan (see page 13).

17.

Replace fan guard and upper shell.

Figure 12 - Spark Plug Gap, 35,000 Btu/Hr Model

Burner Burner

StrapStrap

Figure 13 - Spark Plug Rotation, 35,000 Btu/Hr Model Only

Spark

Plug

Figure 14 - Spark Plug Removal, 50/70/ 100/150,000 Btu/Hr Models

Bend Here to Adjust Gap

Gap

Figure 15 - Spark Plug Gap, 50/70/100/ 150,000 Btu/Hr Models

Continued

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Image 9
Desa NTH35, NTH150, NTH50, NTH100, NTH70 owner manual Spark Plug, 35,000 Btu/Hr Model

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.

The NTH70 strikes a balance between power and compactness, making it a versatile option for medium-range applications. This unit is designed with robustness in mind, incorporating durable materials that ensure longevity. It's equipped with smart sensors that track and adjust performance, maximizing efficiency and reducing wastage.

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.

Lastly, the NTH50 serves as a practical solution for users seeking a middle ground between power and energy efficiency. With a well-rounded set of features, it accommodates diverse applications while promoting sustainability. Its straightforward interface simplifies operation, allowing even novice users to achieve optimal performance.

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.