Desa NTH100, NTH150, NTH50, NTH70, NTH35 Troubleshooting, Observed Fault Possible Cause Remedy

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OWNER’S MANUAL

TROUBLESHOOTING

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

OBSERVED FAULT

POSSIBLE CAUSE

REMEDY

Heater ignites, but flame-out control shuts

1.

Wrong pump pressure

1.

See Pump Pressure Adjustment, page 10.

off heater after a short period of time.

2.

Dirty air output, air intake, and lint filters

2.

See Air Output, Air Intake and Lint

 

 

 

 

Filters, page 10.

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 8.

 

4.

Dirt in nozzle

4.

See Nozzle, page 11.

 

5.

Dirty photocell lens

5.

Clean photocell lens.

 

6.

Bad flame-out control

6.

Replace flame-out control.

 

 

 

 

 

Heater will not ignite, but motor runs for a

1.

Wrong pump pressure

1.

See Pump Pressure Adjustment, page 10.

short period of time.

2.

Carbon deposits on spark plug and/or

2.

See Spark Plug, page 9.

 

 

improper gap

 

 

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 8.

 

4.

Dirt in nozzle

4.

See Nozzle, page 11.

 

5.

Water in fuel tank

5.

Drain and flush fuel tank with clean

 

 

 

 

kerosene. See Storing, Transporting, or

 

 

 

 

Shipping, page 6.

WARNING: High voltage!

6.Electronic ignitor not grounded (earthed)

7.Bad electronic ignitor

6.Make sure electronic ignitor mounting is tight.

7.Replace electronic ignitor.

Motor does not start when heater is plugged 1.

Flame-out control not reset

1.

Reset flame-out control button, see

in, fan rotates slowly or does not turn.

 

 

Figures 5 and 6, page 5.

2.

Binding pump rotor

2.

If fan is hard to turn, see Pump Rotor,

 

 

 

page 12.

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Contents Portable Forced AIR Heaters Portable Forced AIR Heaters Safety InformationUnpacking Product IdentificationFuels Ventilation AssemblyTools Needed To Stop Heater Extension Cord Wire Size RequirementsTheory Operation To Start HeaterHow Often How To Preventative MaintenanceStoring TRANSPORTING, or Shipping ScheduleObserved Fault Possible Cause Remedy TroubleshootingUpper Shell Removal Service ProceduresFuel Filter 35,000 Btu/Hr Model Spark PlugAir Output, Air Intake, and Lint Filters Pump Pressure AdjustmentRemoving Air and Fuel Line Hoses, 35,000 Btu/Hr Model NozzlePump Rotor Procedure if Rotor is BindingWiring Diagrams SpecificationsFan NTH35 35,000 BTU/HR Model Illustrated Parts BreakdownKEY Part Number Description QTY Parts ListMotor and Pump Assembly Burner Head 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 Heavy Duty Wheels and Handle KIT HA1202 AccessoriesWheels Handles AIR Gauge KIT HA1180EC 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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