Desa NTH100-2, NTH50-2, NTH35-2, NTH150-2, NTH70-2 owner manual See Fuel Filter

Page 7

OWNER’S MANUAL

TROUBLESHOOTING

Continued

FAULT CONDITION

POSSIBLE CAUSE

REMEDY

Motor starts and runs but heater does not

1.

No fuel in tank

1.

Fill tank with kerosene

ignite (ON/OFF switch light remains on)

2.

Pump pressure incorrect

2.

See Pump Pressure Adjustment, page 10

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 8

 

4.

Obstruction in nozzle assembly

4.

See Nozzle Assembly, 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.

Bad electrical connection between

6.

Check electrical connections. See Wiring

 

 

ignitor and ignition control assembly

 

Diagram, page 25

 

7.

Defective ignitor

7.

Replace ignitor, see page 9

 

8.

Defective ignition control assembly

8.

Replace ignition control assembly

 

 

 

 

 

 

 

Heater ignites but ignition control assembly

1.

Pump pressure incorrect

1.

See Pump Pressure Adjustment, page 10

shuts heater off after a short period of time

2.

Dirty air intake, air output, and/or lint

2.

See Air Output, Air Intake, and Lint

(ON/OFF switch light remains on)

 

filter

 

Filters, page 10

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 8

 

4.

Obstruction in nozzle assembly

4.

See Nozzle Assembly, page 11

 

5.

Photocell assembly not properly

5.

Make sure photocell boot is properly

 

 

installed (not seeing the flame)

 

seated in bracket

 

 

 

 

 

 

 

WARNING: High voltage!

 

 

 

 

 

 

 

 

 

6.

Dirty photocell lens

6.

Clean photocell lens

 

7.

Bad electrical connection between

7.

Check electrical connections. See Wiring

 

 

photocell and ignition control assembly

 

Diagram, page 25

 

8.

Defective photocell

8.

Replace photocell

 

9.

Defective ignition control assembly

9.

Replace ignition control assembly

 

 

 

 

 

 

 

ON/OFF switch light does not come on 1. No power to heater when switch is turned to the ON () position

and heater does not start

1.Verify that power cord is plugged into an electrical outlet and that the circuit breaker in the electral panel is reset

 

 

 

WARNING: High voltage!

 

 

 

 

 

 

 

2.

Bad electrical connections

2.

Check electrical wiring and connections.

 

 

 

 

See Wiring Diagram, page 25

3.

Electrical short in ignitor

3.

Check ignitor wiring. If no problems are

 

 

 

 

found, replace ignitor (see page 9)

 

 

 

 

ON/OFF switch light comes on when switch 1.

Electrical short in motor

1.

Check motor wiring. If no problems are

is turned to the ON () position but turns off

 

 

 

found, replace motor

after five seconds

 

 

 

 

 

 

 

WARNING: High voltage!

 

 

 

 

 

 

 

 

 

 

 

105787

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Contents Portable Forced AIR Heaters Portable Forced AIR Heaters Safety InformationUnpacking Product IdentificationFuels Ventilation AssemblyTools Needed To Start Heater Extension Cord Wire Size RequirementsTo Reset Heater Theory OperationSchedule Preventative MaintenanceTroubleshooting Storing TRANSPORTING, or ShippingSee Fuel Filter, 35/50/70,000 Btu/Hr Models Service ProceduresUpper Shell Removal Fuel FilterIgnitor Disconnecting Ignitor Wires from Ignition Control AssemblyAIR OUTPUT, AIR INTAKE, and Lint Filters Pump Pressure AdjustmentFuel and AIR Line Replacement Proper Routing Nozzle AssemblyPump Rotor Procedure if Rotor is BindingFAN Ignition Control AssemblyRemove Old Assembly Installing the New AssemblyIllustrated Parts Breakdown Motor and Pump Assembly35,000 BTU/HR Model Number Description QTY Parts List50,000 BTU/HR Model FHPF3-5C 70,000 BTU/HR Model Parts List NTH100-2 100,000 BTU/HR Model NTH100-2 NTH150-2 150,000 BTU/HR Model NTH150-2 100,000 and 150,000 BTU/HR Models Wheels HandlesWiring Diagram SpecificationsHeavy Duty Wheels and Handle KIT HA1202 AccessoriesIgnition Control ASSEMBLY/PHOTOCELL Tester HA1170 AIR Gauge KIT HA1180EC Conformity Declaration EC Conformity DeclarationWarranty Information

NTH35-2, NTH70-2, NTH50-2, NTH100-2, NTH150-2 specifications

Desa NTH series includes advanced models like NTH150-2, NTH70-2, NTH50-2, NTH100-2, and NTH35-2. Each of these models is designed to cater to diverse needs in heating, ventilation, and air conditioning systems, ensuring optimal performance and energy efficiency.

The NTH150-2 is a powerful unit boasting an output capacity of 150,000 BTU. It features a dual-stage heating system, allowing for rapid temperature changes while maintaining energy efficiency. This model is equipped with advanced sensor technology that automatically adjusts the heating output based on room conditions, creating a comfortable indoor environment. Additionally, its robust build ensures durability and longevity.

Next in line is the NTH70-2, a medium-capacity heater suitable for residential settings. This model focuses on user-friendliness with an intuitive digital control panel, offering precise temperature settings and timer functions. The NTH70-2 is also designed with an eco-mode feature, significantly reducing energy consumption while still delivering consistent heating performance.

The NTH50-2 is designed for smaller spaces, providing an output of 50,000 BTU. This model emphasizes portability with a compact design and lightweight construction. It includes safety features like overheat protection and automatic shut-off, making it an excellent choice for individual rooms or smaller apartments. Its noise-reduction technology also ensures quiet operation, enhancing user comfort.

The NTH100-2 strikes a balance between capacity and efficiency, making it a versatile option for various applications. This model incorporates modern inverter technology, enabling it to adjust its power usage based on demand. This results in lower energy bills without compromising the heating experience. The NTH100-2 is also equipped with Wi-Fi connectivity, allowing users to control their heating system remotely via a smartphone app.

Finally, the NTH35-2 serves as an energy-efficient solution for extremely small spaces or as a supplemental heating source. It features low-energy heating technology, which ensures that operational costs remain minimal. This unit is praised for its easy installation and maintenance, making it an ideal choice for those looking for practicality without sacrificing performance.

Overall, the Desa NTH series exemplifies a commitment to innovative heating solutions, blending advanced technology, user-friendly designs, and energy efficiency to meet a wide range of indoor climate needs.
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