Desa NTH100, NTH150, NTH50, NTH70, NTH35 owner manual Pump Rotor, Procedure if Rotor is Binding

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PORTABLE FORCED AIR HEATERS

SERVICE

PROCEDURES

Continued

Pump Rotor

(Procedure if Rotor is Binding)

1.Remove upper shell (see page 8).

2.Remove filter end cover screws using 5/16" nut-driver.

3.Remove filter end cover and air filters.

4.Remove pump plate screws using 5/16" nut-driver.

5.Remove pump plate.

6.Remove rotor, insert, and blades.

7.Check for debris in pump. If debris is found, blow out with compressed air.

8.Install insert and rotor.

9.Check gap on rotor. Adjust to .076/.101 mm (.003"/.004") if needed (see Fig- ure 27).

Note: Rotate rotor one full turn to insure the gap is .076/.101 mm (.003"/.004") at tight- est position. Adjust if needed.

10.Install blades, pump plate, air filters, and filter end cover.

11.Replace fan guard and upper shell.

12.Adjust pump pressure (see page 10).

Note: If rotor is still binding, proceed as follows.

13.Perform steps 1 through 6 above.

14.Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Fig- ure 28).

15.Reinstall insert and rotor.

16.Perform steps 10 through 12 above.

BladeAir

Pump Intake

Plate Filter

Filter End

Cover

Fan Guard

Insert

Rotor

Air Output

Filter

Figure 25 - Rotor Location, 35/50/70,000 Btu/Hr Models

Blade Pump

Plate

Air Intake Filter

Filter End

Cover

Fan Guard

Insert

Rotor

Air Output

Filter

Figure 26 - Rotor Location, 100/150,000 Btu/Hr Models

Gap Adjusting Screw

Blade

Rotor

Gap Adjusting Screw

.076/.101 mm (.003"/.004") Gap Measured With Feeler Gauge

Sandpaper

Figure 27 - Gap Adjusting Screw

Locations

Figure 28 - Sanding Rotor

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Contents Portable Forced AIR Heaters Safety Information Portable Forced AIR HeatersProduct Identification UnpackingFuels Assembly VentilationTools Needed Extension Cord Wire Size Requirements Theory OperationTo Start Heater To Stop HeaterPreventative Maintenance Storing TRANSPORTING, or ShippingSchedule How Often How ToTroubleshooting Observed Fault Possible Cause RemedyService Procedures Upper Shell RemovalFuel Filter Spark Plug 35,000 Btu/Hr ModelPump Pressure Adjustment Air Output, Air Intake, and Lint FiltersNozzle Removing Air and Fuel Line Hoses, 35,000 Btu/Hr ModelProcedure if Rotor is Binding Pump RotorSpecifications Wiring DiagramsFan Illustrated Parts Breakdown NTH35 35,000 BTU/HR ModelParts List KEY Part Number Description QTYBurner Head Assembly Motor and Pump AssemblyNTH50 50,000 BTU/HR Model WLE-3 NTH70 70,000 BTU/HR Model Parts List NTH100 100,000 BTU/HR Model Lock Washer, #10 M16660 Photocell Bracket NTH150 150,000 BTU/HR Model Lock Washer, #10 HA3019 Photocell Assembly Accessories Wheels HandlesAIR Gauge KIT HA1180 Heavy Duty Wheels and Handle KIT HA1202EC Conformity Declaration EC Conformity DeclarationWarranty Information

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.
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