Replacing the Pilot/Thermopile Assembly

1.Remove the burner assembly. See Removing the Burner Door Assembly Section.

2.Lift the retainer clip straight up from the back of the manifold component block (using a flat-blade screwdriver), then remove the manifold component block from the burner door (Figure 25). IMPORTANT: Be careful not to bend or alter the position of the pilot tube. Note the placement/order of the wires in the manifold component block.

Figure 25

 

Manifold Component

 

Block Assembly

Igniter

 

Wire

Pilot Tube

Thermopile

 

 

Connectors

 

Retainer

 

Clip

 

Manifold

 

Component

 

Block

 

Burner Door Opening

3.Turn the burner door assembly over till the pilot/ thermopile assembly is easily accessible.

4.Use a 7/16” wrench to loosen the nut securing the pilot tube to the pilot (right-hand threads). IMPORTANT: Be careful not to bend or alter the position of the pilot/ thermopile assembly components during the following steps. To prevent any bending, use a pair of pliers to steady the pilot/thermopile assembly bracket.

5.Locate and remove the screw attaching the pilot/ thermopile assembly to the burner and keep it for reuse later. IMPORTANT: Be careful not to bend or alter the position of the pilot/thermopile assembly components.

Figure 26

Igniter Connector

Pilot/Thermopile Assembly

Pilot Thermopile

Thermopile

Connectors

Pilot/Thermopile

 

 

Assembly

 

Pilot Tube

 

(Ferrule Nut

 

Not Shown)

6.Install the new pilot/thermopile assembly by routing the new igniter wire and new thermopile wire through the opening in the burner door (See Figure 25).

7.Use the screw removed earlier to attach the new pilot/ thermopile assembly to the burner door assembly. NOTE: Remove the pilot nut included with the new pilot/thermopile. IMPORTANT: Once the pilot nut is removed the pilot orifice MUST be kept in the pilot.

8.Connect the pilot tube to the new pilot and tighten the nut securely. To prevent any bending, use a pair of pli- ers to steady the pilot bracket. IMPORTANT: Keep the pilot orifice in the pilot when making the connection.

DO NOT operate the water heater without the pilot ori- fice installed.

9.Reinstall the manifold component block in the burner door. (See Figures 25). Be sure that the thermopile wires are positioned through the top opening of the manifold component block. The igniter wire should be positioned through the middle opening and the pilot tube through the bottom opening.

10.Follow the “Replacing the Burner Door Assembly” instructions to replace the burner door assembly.

Replacing the Pilot/Thermopile Assembly (50K Models)

1.Remove the burner assembly as directed previously.

2.Lift the retainer clip straight up from the back of the manifold component block (using a flat-blade screwdriver), then remove the manifold component block from the burner door assembly (Figure 27).

Figure 27

 

Manifold Component

 

Block Assembly (50K Models)

Igniter

 

Wire

Pilot Tube

Thermopile

 

 

Connectors

 

Retainer

 

Clip

 

Manifold

 

Component

 

Block

Burner Door Opening

 

3.Locate and remove the screw attaching the pilot/ thermopile assembly to the burner and keep it for reuse later. IMPORTANT: Be careful not to bend or alter the position of the pilot/thermopile assembly components.

4.Pull the pilot/thermopile assembly from the burner door assembly. IMPORTANT: Be careful not to bend or alter the position of the pilot assembly components.

5.Use the old pilot tube as a guide and bend the new pilot tube to match the old one. Make only the bends closest to the pilot before going to the next step.

25

Page 24 Page 26
Page 25
Image 25
American Water Heater 318935-003 installation instructions Replacing the Pilot/Thermopile Assembly
Page 24 Page 26

318935-003 specifications

The American Water Heater 318935-003 stands out as a reliable option for residential and commercial hot water needs. Manufactured by American Water Heater Company, a brand known for its commitment to quality and innovation, this model integrates several advanced features and technologies to enhance efficiency, durability, and user experience.

One of the defining characteristics of the 318935-003 is its impressive efficiency rating. Designed with energy conservation in mind, it employs a highly efficient heating process that significantly reduces energy consumption. This not only helps in lowering utility bills for homeowners and businesses but also contributes to a more sustainable environment. The water heater meets or exceeds Energy Star guidelines, making it an eco-friendly choice.

The technology used in this model includes a state-of-the-art thermostat and advanced insulation material that ensures optimal heat retention. This dual approach minimizes heat loss, ensuring that hot water is readily available when needed while maintaining consistent temperatures. The adjustable thermostat allows users to customize settings to their preferences, thus improving comfort and efficiency.

Additionally, the 318935-003 features a robust design with high-quality materials that enhance its longevity. Its tank is constructed from durable steel, coated with a corrosion-resistant finish, which ensures that it withstands the test of time and minimizes maintenance needs. The unit is also equipped with a comprehensive safety system that includes a temperature and pressure relief valve, safeguarding against potential malfunctions.

The installation process of the American Water Heater 318935-003 is straightforward, making it accessible for both professionals and DIY enthusiasts. It is compatible with various plumbing systems and configurations, offering flexibility in installation locations. Maintenance is also user-friendly, with accessible components that allow for easy upkeep.

In summary, the American Water Heater 318935-003 embodies the ideal blend of efficiency, durability, and advanced technology. Its energy-efficient design, robust construction, and user-friendly features make it a top choice for anyone looking to fulfill their hot water requirements. Whether for a busy household or a commercial establishment, this water heater delivers consistent performance, ensuring a reliable supply of hot water year-round. Investing in the 318935-003 means investing in long-term satisfaction and efficiency, making it a wise addition to any space.
Top Page Image Contents