Desa D44N, D20N, D30N AIR OUTPUT, AIR INTAKE, and Lint Filters, Pump Pressure Adjustment

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D20N, D30N AND D44N MODELS PORTABLE FORCED AIR HEATERS

SERVICE

PROCEDURES

Continued

AIR OUTPUT, AIR INTAKE, AND LINT FILTERS

1.Remove upper shell (see page 8).

2.Remove filter end cover screws using 5/16" nut-driver.

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (see Preventative Maintenance Schedule, page 6).

6.Replace filter end cover.

7.Replace fan guard and upper shell.

IMPORTANT: Do not oil filters

PUMP PRESSURE

ADJUSTMENT

1.Remove pressure gauge plug from filter end cover.

2.Install accessory pressure gauge (part number HA1180).

3.Start heater (see Operation, page 5). Allow motor to reach full speed.

4.Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See specifications below for correct pres- sure for each model.

5.Remove pressure gauge. Replace pres- sure gauge plug in filter end cover.

Air Intake Filter

Filter End

Fan Guard

Cover

Lint Filter

Air Output

Filter

Figure 13 - Air Output, Air Intake, and Lint Filters, D20N Model

Air Intake Filter

Filter End

Fan Guard

Cover

 

Lint Filter

Air Output

Filter

Figure 14 - Air Output, Air Intake, and Lint Filters, D30N and D44N Models

Pressure

 

 

Gauge

 

Pump

Plug

 

Relief

 

Pressure

Model

(PSI/Bar)

Valve

D20N

4.7/0.324

 

 

D30N

4.9/0.338

 

D44N

5.5/0.380

Figure 15 - Pressure Gauge Plug Removal

(D20N Model Shown)

Pressure

Gauge

Figure 16 - Adjusting Pump Pressure

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105843

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Contents Portable Forced AIR Heaters Safety Information D20N, D30N and D44N Models Portable Forced AIR HeatersProduct Identification Unpacking FuelsVentilation AssemblyTools Needed Theory Operation To Reset HeaterExtension Cord Wire Size Requirements To Start HeaterStoring TRANSPORTING, or Shipping Preventative MaintenanceTroubleshooting ScheduleON/OFF switch light remains on Filter Obstruction in nozzle assemblyWater in fuel tank Drain and flush fuel tank with clean Photocell and ignition control assemblyFuel Filter Service ProceduresUpper Shell Removal D20N ModelDisconnecting Ignitor Wires from Ignition Control Assembly IgnitorPump Pressure Adjustment AIR OUTPUT, AIR INTAKE, and Lint FiltersNozzle Assembly Fuel and AIR Line Replacement Proper RoutingProcedure if Rotor is Binding Pump RotorInstalling the New Assembly Ignition Control AssemblyRemove Old Assembly FANIllustrated Parts Breakdown Motor and Pump AssemblyD20N Model Parts List Number Description QTYD30N Model KEY Part Number Description QTY D44N Model D44N Model Desired partWheels and Handles NTC-3CAccessories SpecificationsWiring Diagram EC Conformity Declaration EC Conformity Declaration105843 Warranty Information

D30N, D44N, D20N specifications

Desa D30N, D20N, and D44N are advanced digital communication devices designed to enhance connectivity and streamline information transfer across various industries. These models exemplify modern technological innovations while addressing the growing demands for efficient communication in an increasingly interconnected world.

The Desa D30N is recognized for its impressive data transmission capabilities, featuring a robust multimedia communication interface that supports seamless integration across multiple platforms. This model employs cutting-edge encoding technologies that ensure high-quality audio and video streaming, making it an ideal choice for enterprises looking to facilitate clear and efficient virtual meetings. The D30N also incorporates advanced encryption protocols to safeguard sensitive information, ensuring secure end-to-end communication.

In contrast, the Desa D20N focuses on versatility and ease of use. This model is designed with a user-friendly interface that allows for quick deployment and intuitive operation. It supports numerous connectivity options, from traditional wired connections to modern wireless protocols, making it suitable for a variety of environments. The D20N is particularly well-suited for small to medium-sized businesses, providing essential communication tools without the need for extensive technological investment. Its compact design also allows it to fit conveniently into any workspace.

The Desa D44N stands out with its high-performance specifications tailored for heavy-duty applications. This model is engineered to deliver exceptional reliability and durability, making it suitable for demanding industrial environments. With enhanced signal processing capabilities, the D44N can handle multiple data streams simultaneously without compromising performance. It also incorporates long-range communication technologies, which enable it to maintain stable connections over considerable distances. This feature is essential for industries that require continuous monitoring and coordination across vast operational landscapes.

All three models—D30N, D20N, and D44N—boast compatibility with various operating systems and software applications, ensuring they can meet the unique needs of different users. Moreover, they are designed with energy efficiency in mind, promoting sustainable practices within organizations.

In summary, the Desa D30N, D20N, and D44N are exemplary digital communication solutions, each optimized for distinct operational requirements. With their unique technologies and characteristics, these devices play a pivotal role in fostering effective communication, enhancing productivity, and supporting ambitious business strategies in the digital age.