Replacement Parts

IMPORTANT: The following maintenance procedures are for the Flame Guard™ Safety System components and should be performed by a qualified person.

Replacement parts may be ordered through your plumber or the local distributor. Parts will be shipped at prevailing prices and billed accordingly. When ordering replacement parts, always have the following information ready:

1.model, serial, and product number

2.type of gas

3.item number

4.parts description

See pages 31-32 for a list of available repair parts.

Removing the Burner Door Assembly

1.Turn off the gas to the water heater at the manual shut-off valve (Figure 3).

2.Before performing any maintenance, it is important to

turn off the gas supply to the	Figure 22
water heater at the manual	Figure 22
water heater at the manual	Gas Control Valve/
gas shut-off valve. This valve	Gas Control Valve/
gas shut-off valve. This valve	Thermostat
is typically located beside
the water heater. Note the
position of the shut-off valve
in the open/on position, then			Sensor
proceed to turn it off (Figure			Sensor
	VAC		Wires
			Wires
3).
3. Remove the outer door.	Igniter		White
	Button		Wire
4. Remove the two screws	Igniter		(Right
(1/4” nut driver) securing	Igniter		Side)
(1/4” nut driver) securing	Lead
the burner door assembly	Wire	Pilot
the burner door assembly		Pilot	Red
to the combustion chamber		Tube	Red
to the combustion chamber		Tube	Wire
(Figure 23).	Igniter	Manifold	(Left
	Wire	Tube	Side)

5.Disconnect the pilot tube

(7/16” wrench), the igniter wire from the igniter lead wire, and manifold tube (3/4” wrench) at the gas control valve/thermostat. Disconnect the sensor wires (lift white lever outward, then gently pull the plug downward). Also, use needle nose pliers to disconnect the red (+) and white (-) thermopile wires from the gas control valve/thermostat. See Figures 22 & 23.

Figure 23
Burner Assembly	Gas Control Valve/	Temperature Sensor
Removal	Thermostat	Wire Connection
		Thermopile
		Wire
Piezo Igniter Button		Connections
Pilot Tube		Manifold Tube
Pilot Tube
Viewport		Temperature
		Sensor
Outer Door
Not Shown		Burner Door
		Burner Door
Burner Door Screws (2)	Manifold Component Block
24

6.Grasp the manifold tube and push down slightly to free the manifold, pilot tube, and thermopile.

7.Carefully remove the burner door assembly from the burner compartment.

NOTE: Be sure not to damage internal parts.

Figure24A

NaturalGas(LowNox)

Burner Door Assembly

Pilot Assembly

Burner

Use brush on this surface.

Figure24B

NaturalGas(LowNox)

Burner Door Assembly

50K Models

Pilot Assembly

Burner

Use brush on this surface.

Natural Gas Burner (Ultra Low Nox)

Check the burner to see if it is dirty or clogged. The burner may be cleaned with soft paint brush (Figure 24). Do not use a wire brush or any tool that may damage the burner screen. Important: Do not use the burner if the burner screen is damaged. NOTE: Damage may be rips or holes in the burner screen. Discoloration is normal.

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.