State GS6 75 URRBS - Manual (Page 22)

22
REPLACEMENT PARTS
IMPORTANT: The following maintenance procedures should be
performed by a qualifi ed 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. item number
3. parts description
See “Repair Parts” section for a list of available repair parts.
Removing the Burner Door Assembly
1. Turn off the gas to the water heater at the manual gas shut-off
valve (Figure 1).
2. Turn the gas control knob on the combination gas control valve/
thermostat clockwise to the off position.
3. Remove the outer door.
4. Remove the four screws securing the burner door assembly
to the combustion chamber (Figure 21).
5. Disconnect the thermocouple (right-hand thread), pilot tube,
the ignitor wire from the ignitor button, and manifold tube at
the thermostat (Figure 21).
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 careful not to damage the burner
screen or pilot assembly.
Natural Gas Burner (Ultra Low Nox)
Check the burner screen to see if it is dirty or clogged. The burner
screen may be cleaned with a soft paint brush. Do not use a wire
brush or any tool that might damage the burner screen.
!MPORTANT: Do not use the burner if the burner screen is damaged.
NOTE: Damage would be rips or holes in the burner screen.
Discoloration is normal.
FIGURE 22
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 fl athead 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.
3. Remove the screw securing the pilot assembly to the burner and
keep it for reuse later.
4. Remove the old pilot assembly (including the ignitor wire) from
the burner door assembly.
5. Use the screw removed previously step to secure the new pilot
assembly to the burner.
6. Insert the ignitor wire, pilot tube and thermocouple through the
hole in the burner door.
7. R e i n s t a l l t h e t w o p i e c e w i r e c o n n e c t o r .
NOTE: The pilot tube must be at the top followed by the ignitor
wire then the thermocouple.
8. Follow the instructions in “Replacing the Burner Door Assembly”
section to reinstall the assembly.
Burner Pilot Assembly
Use brush on this surface
Natural Gas (Low Nox)
Burner Door Assembly
REPLACING PARTS
Screws (4)
Thermocouple
Pilot Tube Ignitor Wire Manifold Tube
FIGURE 21