beautypg.com

Removing the burner door assembly, Ultra low nox natural gas burner, Replacing the pilot assembly – Kenmore Power Miser 9 Gas Water Heater 153.33096 User Manual

Page 21

background image

21

Removing the Burner Door Assembly

1. Turn off the gas to the water heater at the manual gas

shut-off valve (Figure 3).

2. Turn the gas control knob on the combination gas control

valve/thermostat clockwise to the “OFF” position (Figure 1).
NOTE: Depress the dial stop on Robertshaw valve before
turning the gas control knob. See Lighting Instructions on
the water heater.

3. Remove the outer door.

4. Remove the two screws securing the burner door

assembly to the combustion chamber. (Figure 24).

GAS VALVE/

THERMOSTAT

THERMOCOUPLE

MANIFOLD

TUBE

VIEWPORT

DOOR

SCREW (2)

TWO PIECE WIRE

CONNECTOR

PILOT

TUBE

BURNER

DOOR

PIEZO

IGNITER
BUTTON

FIGURE 24.

5. Disconnect the thermocouple (right-hand thread), pilot

tube, the igniter wire from the igniter button, and manifold
tube at the thermostat.
(Figure 25).

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

the manifold tube, pilot tube, and thermocouple.

7. Carefully remove the burner door assembly from the

combustion chamber. Be sure not to damage internal
parts.

ROBERTSHAW GAS VALVE

THERMOCOUPLE

MANIFOLD TUBE

PILOT TUBE

FIGURE 25.

Ultra Low NOx Natural Gas Burner

Check the burner to see if it is dirty or clogged. The burner
may be cleaned with soft paint brush (Figure 26). 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.

BURNER

PILOT ASSEMBLY

USE BRUSH ON THIS SURFACE

FIGURE 26.

Replacing the Pilot Assembly

1.

Follow the instructions in “Removing the Burner Door
Assembly” section to remove the assembly.

2.

Remove the retainer clip securing the two piece wire
connector to the burner door assembly. (Note the orientation
of the retainer clip). Insert the tip of a large flat head
screwdriver between the clip and the top of the two piece
wire connector. Carefully rotate the screwdriver to raise the
clip. It may be necessary to remove the connector one side
at a time. (See Figure 27.)

3. Locate where the thermocouple connects to the rear of the

pilot assembly, and pull the thermocouple tip from the rear of
the pilot assembly.

4. Remove the nut securing the pilot assembly to the burner

and keep it for reuse later.

5. Use a 1/2” open end wrench, to loosen the nut securing the

pilot tube to the pilot. To prevent any bending use a pair of
pliers to steady the pilot bracket.

6. Remove the old pilot assembly (including the igniter wire)

from the burner door assembly.

7. Insert the pilot tube into the new pilot assembly. Important:

The new pilot assembly comes with an orifice. This orifice
must be installed when replacing the pilot assembly.
IMPORTANT: Do not operate this water heater without the
orifice in place.

8. Use a 1/2” open end wrench, to tighten the nut securing the

pilot tube to the pilot. To prevent any bending use a pair of
pliers to steady the pilot bracket.

9. Use the nut removed in a previous step to secure the new

pilot assembly to the burner.

10. Insert the igniter wire through the burner door and reconnect

the thermocouple to the pilot assembly. See “Replacing the
Thermocouple” section.

11. Reinstall the two piece wire connector. NOTE: The pilot

tube must be at the top followed by the igniter wire then the
thermocouple.

12. Follow the instructions in “Replacing the Burner Door

Assembly” section to reinstall the assembly.

This manual is related to the following products: