Desa D20H, D44H, D30H Theory Operation, To Start Heater, To Stop Heater, To Reset Heater

Page 5

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.

OPERATION

WARNING: Review and un- derstand the warnings in the Safety Information section, page

2.They are needed to safely op- erate this heater. Follow all local codes when using this heater.

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 () position and heater should start in 5 seconds. If heater

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 ignition control assembly provides power to the ignitor. This ignites the fuel/air mixture in the combustion chamber.

The Flame-Out Control System

This system causes the heater to shut down if the flame goes out.

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.

does not start, see Troubleshooting (page 7).

TO STOP HEATER

1.Push ON/OFF switch to OFF (O) position.

TO RESET HEATER

1.Push ON/OFF switch to OFF (O) posi- tion and wait 10 seconds (2 minutes if heater has been running).

2.Repeat steps under To Start Heater.

ON/OFF Switch

 

O

 

 

Combustion Chamber

Ignitor

Motor

Air Pump

 

 

 

Air Intake

 

 

 

Fan

Filter

Clean

 

 

 

Cool

Heated

 

 

 

 

 

 

Air

Air Out

 

 

 

 

 

 

In

 

 

 

 

 

 

 

 

Air

 

 

 

 

Output

 

 

 

 

Filter

Fuel

Nozzle

Fuel

Air Line

Ignition Control

Tank

 

Filter

To Burner

Assembly

 

Air For Fuel System

 

Air For Combustion

Fuel

 

 

And Heating

 

 

 

 

Figure 4 - Cross Section Operational View

Figure 5 - ON/OFF Switch, D20H Model

ON/OFF Switch

 

O

 

Figure 6 - ON/OFF Switch, D30H and D44H Models

105843

5

Image 5
Contents Portable Forced AIR Heaters D20H, D30H and D44H Models Portable Forced AIR Heaters Safety InformationFuels Product Identification UnpackingTools Needed AssemblyVentilation Theory Operation To Reset HeaterTo Start Heater To Stop HeaterStoring TRANSPORTING, or Shipping Preventative MaintenanceSchedule How Often How ToTroubleshooting Upper Shell Removal Service ProceduresFuel Filter D20H ModelIgnitor 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 BindingWiring Diagram SpecificationsIgnition Control Assembly Procedure for Replacing FuseD20H Model Motor and Pump AssemblyIllustrated Parts Breakdown Number Description QTY Parts ListD30H Model KEY Part Number Description QTY D44H Model Desired part D44H ModelIgnition Control ASSEMBLY/PHOTOCELL Tester HA1170 AccessoriesWheels and Handles AIR Gauge KIT HA1180EC Conformity Declaration EC Conformity DeclarationWarranty Information