Desa NTH70-2, NTH50-2, NTH35-2 Disconnecting Ignitor Wires from Ignition Control Assembly

Page 9

OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

IGNITOR

1.Remove upper shell and fan guard (see page 8).

2.Remove fan (see page 13).

3.Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 9 or 10, page 8).

4.Disconnect ignitor wires (black) from ignition control assembly (see Figure 11). Pull the ignitor wires up through the hole in the lower shell.

5.Disconnect fuel line hose and air line hose. Remove photocell from photocell bracket (see Figure 11).

Combustion

Nozzle

Chamber

Adapter

 

Bracket

 

Ignitor

6.Remove combustion chamber. Stand combustion chamber on end with nozzle adapter bracket on top (see Fig- ure 12).

7.Remove ignitor screw with a 1/4" nut driver. Carefully remove ignitor from nozzle adapter bracket.

CAUTION:Donotbendorstrike ignitor element. Handle with care.

8.Carefully remove replacement ignitor from styrofoam packing.

9.Carefully guide ignitor into opening in nozzle adapter bracket. Do not strike ignitor element. Attach ignitor to nozzle adapter bracket with screw us- ing a 1/4" nut driver (see Figure 12). Torque .90 to 1.69 N-m (8 to 15 in-lbs). Do not over torque.

Ignitor Screw/Washer

Assembly

10.Replace combustion chamber.

11.Route the ignitor wires back down through the hole in the lower shell. Connect wires to the ignition control assembly.

12.Replace side cover (see Figure 9 or 10, page 8).

13.Connect and route fuel line hose and air line hose to burner head. See Fuel and Air Line Replacement and Proper Routing, page 11.

14.Replace photocell in photocell bracket. Route wires as shown in either Figure 17, 18, or 19, page 11.

15.Replace fan (see page 13).

16.Replace fan guard and upper shell (see page 8).

Air

Ignitor

Line

Wires

Hose

 

Fuel

 

Line

 

Hose

 

Photocell

Ignition

Control

Bracket

Assembly

Photocell

 

Assembly

 

Side Cover

 

Figure 11 - Disconnecting Ignitor Wires from Ignition Control Assembly

Ignitor

Ignitor

Element

Nozzle

Photocell

Adapter

Bracket

Bracket

 

Combustion

Nozzle Adapter

Bracket Opening

Chamber

 

Figure 12 - Ignitor Replacement

Continued

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Contents Portable Forced AIR Heaters Portable Forced AIR Heaters Safety InformationProduct Identification UnpackingFuels Assembly VentilationTools Needed To Reset Heater Extension Cord Wire Size RequirementsTheory Operation To Start HeaterTroubleshooting Preventative MaintenanceStoring TRANSPORTING, or Shipping ScheduleSee Fuel Filter, Upper Shell Removal Service ProceduresFuel Filter 35/50/70,000 Btu/Hr ModelsIgnitor 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 BindingRemove Old Assembly Ignition Control AssemblyInstalling the New Assembly FANMotor and Pump Assembly Illustrated Parts Breakdown35,000 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 SpecificationsIgnition Control ASSEMBLY/PHOTOCELL Tester HA1170 AccessoriesAIR Gauge KIT HA1180 Heavy Duty Wheels and Handle KIT HA1202EC 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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