Replacing the Manifold/Burner Assembly

6.Reposition the manifold component block in the mani-fold door opening and secure it with the retainer clip.

7.See Replacing the Manifold/Burner Assembly.

External Inspection & Cleaning of the Air Intake Chamber Screen

1.At least twice annually inspect the air intake chamber screen (Figure 38) for any dust or debris that may have accumulated on the louvers. NOTE: If the water heater is located in an area that is subjected to lint and dirt, it may be necessary to check the air intake chamber screen

more frequently.

2. Use a vacuum cleaner with a hose attachment to remove any dust or debris that may have accumulated on the screen.

Air Intake Chamber

Screen

FIGURE 38.

Cleaning the Combustion Chamber and Air Diverter Assembly

1.Follow procedure outlined in “Removing the Manifold/Burner Assembly”.

2.Use a vacuum cleaner/shop vac to remove all loose debris in the combustion chamber (Figure 39). Use compressed air to clear any dust or debris that may have accumulated on the air diverter assembly.

Air Diverter	Combustion
Assembly	Chamber
Manifold
Door Gasket
FIGURE 39.

3.Reassemble following the procedure under “Replacing the Manifold/Burner Assembly”

WARNING

Explosion Hazard

•Remove any fiberglass between gasket and combustion chamber.

•Replace viewport if glass is missing or damaged.

•Replace two piece wire connector if missing or removed.

•Replace door gasket if damaged.

•Tighten both manifold door screws securely.

•Failure to follow these instructions can result in death, explosion, or fire.

1.Check the door gasket for damage or imbedded debris prior to installation.

2.Inspect the view port for damage and replace as required.

3.Insert the manifold/burner assembly into the burner compartment making sure that the tip of the manifold tube engages in the slot of the bracket inside the combustion chamber (Figure 40).

4.Inspect the door gasket and make sure there is no fiberglass insulation between the gasket and the

combustion chamber.

5.Replace the two screws, which secure the manifold/ burner assembly door to the combustion chamber and tighten securely. Once the manifold/burner assembly door is tightened, visually inspect the door gasket between the manifold/burner assembly door and the combustion chamber for spaces or gaps that would prevent a seal. IMPORTANT: Do not operate the water heater if the door gasket does not create a seal between the manifold door and the combustion chamber.

6.During the following procedure, do not cross-thread or apply any thread sealant to any of the fittings listed below. First, reconnect the manifold tubing to the gas control valve/ thermostat.

7.Reconnect the flame sense/hot surface igniter wire to the gas control valve/thermostat (Figure 35).

8.Turn gas supply on and refer to the Lighting Instructions.

9.With the burner lit, check the gas control valve/thermostat supply line, two piece wire connector, and manifold tube connections for leaks. Check for leaks by brushing on an approved noncorrosive leak detection solution. IMPORTANT:

Do Not splash solution onto the electrical connections. Bubbles forming indicate a leak. Correct any leak found. All leaks must be fixed immediately.

153.33262 specifications

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