Desa RJ70 owner manual Fuel Filter, Ignitor RJ45

Page 9

OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

FUEL FILTER

1.Remove side cover screws using 5/16" nut-driver (see Figure 9).

2.Remove side cover.

3.Pull upper fuel line off fuel filter neck.

4.Carefully pry bushing and fuel filter out of fuel tank.

5.Wash fuel filter with clean fuel and re- place in tank.

6.Attach upper fuel line to fuel filter neck.

7.Replace side cover (see Figure 9).

IGNITOR (RJ45)

1.

Remove upper shell and fan guard (see

 

Upper Shell Removal, page 8).

2.

Remove fan (see Fan, page 8).

3.

Remove side cover screws with a 5/16"

 

nut driver. Remove side cover (see Fig-

 

ure 9).

4.

Disconnect ignitor wires from ignition

 

control assembly (see Figure 10). 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 10).

6.

Remove combustion chamber. Stand

 

combustion chamber on end with nozzle

 

adapter bracket on top (see Figure 11).

Combustion

Chamber

Air Line

Hose

Fuel

Line

Hose

Photocell

Bracket

Photocell

Assembly

Side Cover

Nozzle

Adapter

Bracket

Ignitor

Ignitor Wires (Gray)

Ignition

Control

Assembly

Fuel Filter

Side Cover

Upper Fuel Line

Figure 9 - Fuel Filter Removal

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 using a 1/4"

 

nut driver (see Figure 11). Torque 1800

 

to 3500 grams/centimeters. Do not over

 

torque.

10.

Replace combustion chamber.

11.

Route the ignitor wires back down

 

through the hole in the lower shell.

 

Connect wires to the ignition control

Figure 10 - Disconnecting Ignitor Wires from Ignition Control Assembly

 

Ignitor

 

Screw

 

Ignitor

Ignitor

Nozzle

Photocell Element

Adapter

Bracket

Bracket

assembly. See Wiring Diagrams, page

12, for correct terminal locations.

12. Replace side cover (see Figure 9).

Combustion Chamber

Nozzle Adapter Bracket Opening

13.

Connect and route fuel line hose and

 

air line hose to nozzle assembly. See

 

Fuel and Air Line Replacement and

 

Proper Routing, page 10.

14.

Replace photocell in photocell bracket.

 

Route wires between hoses and back

 

down through the hole in the lower shell

 

with ignitor wires (see Figure 10).

15.

Replace fan (see Fan, page 8).

16.

Replace fan guard and upper shell (see

 

Upper Shell Removal, page 8).

Figure 11 - Ignitor Replacement

Continued

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Contents Portable Forced AIR Heater Unpacking Safety InformationRJ45 Product IdentificationVentilation Theory of Operation FuelsPreventative Maintenance Schedule OperationStoring TRANSPORTING, or Shipping RJ45 TroubleshootingRJ70 Pump Pressure Adjustment Service ProceduresUpper Shell Removal FANIgnitor RJ45 Fuel FilterFuel and AIR Line Replacement Proper Routing Spark Plug RJ70Nozzle RJ45 Pump Rotor Nozzle RJ70Ignition Control Assembly Wiring DiagramsAccessories SpecificationsRJ45 Illustrated Parts BreakdownNumber Description QTY Parts ListRJ70 KEY Part Number Description QTY Warranty and Repair Service

RJ70, RJ45 specifications

Desa RJ45 and RJ70 are two prominent connector types commonly used in networking and telecommunications. They serve as vital components in facilitating communication and data transfer over various networks, playing crucial roles in both home and commercial environments.

The RJ45 connector is perhaps the most recognized of the two, primarily used in Ethernet networks. Its standard design accommodates eight pins, enabling the connection of twisted-pair cables, most notably Category 5e, Category 6, and higher. This widespread acceptance can be attributed to its ability to support high-speed data transfer rates, with contemporary setups allowing speeds up to 10 Gbps over short distances. Key features of the RJ45 connector include its simple plug-and-play functionality, which streamlines installation and enhances user experience.

In comparison, the RJ70 connector is less common but is engineered for specific applications within telecommunications. This connector is designed with four pins, mainly used with telephone systems and low-speed data transmission. The RJ70 is particularly notable for its application in modular voice communication, where it is employed to connect telephones and to facilitate basic data connections.

Both RJ45 and RJ70 utilize differential signaling to enhance performance and reduce interference, which is vital in densely populated electronic environments. Furthermore, the connectors’ compact size aids in efficient space management, an important characteristic in data centers and telecom applications.

The physical structure of these connectors includes a locking mechanism to secure connections firmly, ensuring stability during operation. Additionally, RJ45 connectors typically come in shielded (STP) and unshielded (UTP) variations, offering options for users based on their environmental needs to mitigate electromagnetic interference.

In summary, Desa RJ45 and RJ70 connectors are integral to modern networking technologies. RJ45 connectors dominate Ethernet installations with their high-speed capabilities and versatility, while RJ70 connectors fulfill niche roles in voice communication systems. Understanding the features and technologies behind these connectors is essential for professionals in telecommunications and networking, ensuring optimal setup and performance in diverse applications. The ongoing evolution in networking demands keeps these connector types relevant, adapting to the increasing bandwidth requirements and technological advancements in data communication.