Desa NTH150, NTH50 Theory Of Operation, To Start Heater, Extension Cord Wire Size Requirements

Models: NTH35 NTH70 NTH100 NTH50 NTH150

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THEORY OF

OWNER’S MANUAL

THEORY OF

OPERATION

The Fuel System: The air pump forces air through the air line. The air is then pushed through the burner head nozzle. This air causes fuel to lift from the tank. A fine mist of fuel is sprayed into the combustion chamber.

The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

The Ignition System: The electronic ignitor sends voltage to the spark plug. The spark plug ignites the fuel and air mixture.

The Flame-Out Control System: This system causes the heater to shut down if the flame goes out.

OPERATION

OPERATION WARNING: Review and un- derstand the warnings in the Safety Information Section. They are needed to safely operate this heater. Follow all local codes when using this heater.

TO START HEATER

1.Follow all ventilation and safety infor- mation.

2.Fill fuel tank with kerosene or No. 1 fuel oil.

3.Attach fuel cap.

4.Plug power cord of heater into standard 230 volt/50 hertz, grounded (earthed) outlet. Use an extension cord if needed. Use only a three-prong, grounded (earthed) extension cord.

EXTENSION CORD WIRE SIZE REQUIREMENTS

Up to 30.5 meters (100 feet) long, use 1.0 mm2 (16 AWG) conductor

30.6to 61 meters (101 to 200 feet) long, use

1.5mm2 (14 AWG) conductor

Push ON/OFF switch to ON and heater should start. If heater does not start, press flame-out control reset button (see Figures 5 and 6).

TO STOP HEATER

1.Push ON/OFF switch to OFF.

TO RESTART HEATER

1.Wait 2 minutes after stopping heater.

2.Repeat steps under To Start Heater.

Flame-Out Control

Reset Button

ON/OFF Switch

 

 

 

 

Motor

Air Pump

 

Combustion

Spark

 

Fan

Intake Air

 

Chamber

Plug

Burner

Filter

 

 

 

Head

 

 

Clean

 

 

 

 

Cool

Heated

 

 

 

 

 

 

 

 

Air In

Air Out

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

 

 

 

 

 

Air Filter

Fuel

Nozzle

Fuel

 

Air Line

Electronic

Tank

Filter

 

To Burner

Ignitor

 

 

 

Air For Fuel

 

Air For

 

 

 

 

Combustion

Fuel

 

System

 

 

 

And Heating

 

 

 

 

 

Figure 4 - Cross Section Operational View

Figure 5 - Flame-Out Control Reset Button, 35/50/70,000 Btu/Hr

Flame-Out Control

Reset Button

ON/OFF

Switch

Figure 6 - Flame-Out Control Reset Button, 100/150,000 Btu/Hr

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Desa NTH150 Theory Of Operation, To Start Heater, Extension Cord Wire Size Requirements, To Stop Heater, To Restart Heater