Arrestor Cleaning; Damper Relay Installation - Bradford White D4403S*F(BN Service Manual

Residential flue damper

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Table Of Contents

Table of Contents

ScreenLok

Flame Arrestor Cleaning Procedure

Step 1.

Move the gas control power switch to the "OFF" position and unplug the

water heater from the wall outlet.

Step 2.

Remove the outer door.

Step 3.

Remove the right side inner door per the Inner Door Removal Procedure

on page 32.

Step 4.

Disconnect the pilot tube using a 7/16" wrench and the main burner

feedline with a 3/4" wrench from the gas control.

Step 5.

Disconnect the spark igniter/flame sensor wire from gas control.

Step 6.

Remove the burner assembly from the combustion chamber.

Step 7.

Clean the ScreenLok

and/or a shop vacuum to remove any scale or other debris accumulation. Using a soft

brush, clear jacket openings from any dirt, dust, restrictions, or other obstructions.

Step 8.

Remove any debris from the burner assembly following the Burner

Cleaning Procedure on page 15.

Step 9.

Re-install the burner assembly.

Step 10.

Reconnect the main and pilot tubing and spark igniter wire to the gas

control.

Step 11.

Re-install the inner door per the Inner Door Installation with Gasket

Procedure on page 34.

Step 12.

To resume operation, follow the instructions located on the water heater

lighting instruction label. Or, use the lighting instructions located in the water heater

installation and operating manual.

Damper Relay Installation

If the damper fails and water heater operation is necessary temporarily, a relay, p/n

233-47642-00, and harness, p/n 239-48471-00, can be ordered from the Bradford

White Service Parts Department.

Step 1.

Move the gas control power switch to the "OFF"

position.

flame arrestor using a stiff brush, compressed air,

Gas control power

switch