John Wood Atmospheric Gas (ENERGY STAR) - NEW - Manuel (Page 25)

25
Removing the Burner from the Manifold/
Burner Assembly
Natural Gas (Low Nox) & L.P. Gas Burner
1. Take off the burner by removing the two (2) screws lo-
cated underneath the burner.
2. Check the burner to see if it is dirty or clogged. The burner
may be cleaned with soap and hot water (Figure 25).
BURNER
(BOTTOM VIEW)
SCREWS
FIGURE 25.
Replacing the Pilot/Igniter -
Flame Sensor Assembly
1. Remove the manifold assembly as directed previously.
2. Lift the retainer clip straight up from the back of
the manifold component block (using a flat-blade
screwdriver), then remove the manifold component
block from the manifold door (Figure 26).
3. Using a 7/16” wrench, loosen the nut securing the pilot
tube to the pilot assembly.
NOTE: To prevent any bending of the pilot bracket, use
pliers to hold the pilot assembly bracket while loosening
the pilot nut.
Pilot/Igniter-Flame Sensor Assembly
Manifold Component
Block
Pilot Tube
Igniter
Wire
Manifold Door
Retainer
Clip
FIGURE 26.
4. Pull the pilot tube from the pilot assembly (Figure
27).IMPORTANT: Be careful not to bend or alter the
position of the pilot assembly components.
5. Use a screwdriver to remove the screws securing the
Pilot/Igniter - Flame Sensor Assembly. Keep the screws
for reattachement.
6. Using the old pilot/pilot tube assembly as a guide, bend
the new pilot tube to match the old one. Make only the
bends closest to the pilot before going to the next step.
FIRST BEND(S)
OTHER FITTINGS
NOT SHOWN
FOR CLARITY
PILOT TUBE
SCREWS
OLD PILOT/IGNITER -
FLAME SENSOR ASSEMBLY
FIGURE 27.
7. Push the new pilot tube and igniter wire through the
hole in the manifold door (See Figure 27). Reconnect
the pilot tube and tighten the nut securing it to the pilot
assembly.
IMPORTANT: Keep the pilot orifice in the pilot when
making the connection. DO NOT operate the water
heater without the pilot orifice installed. Reattach the
pilot assembly to the manifold.
8. Be sure the igniter wire is positioned through the
bottom opening of the manifold component block. See
“Replacing Manifold Assembly” section.
MANIFOLD COMPONENT BLOCK
PILOT TUBE
IGNITER WIRE
FIGURE 28.
External Inspection & Cleaning of the
Base-Ring Filter
1. At least annually check the base-ring filter (Figure 29)
for any dust or debris that may have accumulated on the
filter screen. NOTE: If the water heater is located in an
area that is subjected to lint and dirt, it may be necessary
to check the base-ring filter more frequently.
2. Follow the Lighting Instructions to turn off the water
heater and allow it to cool for 10 minutes before
attempting to clean the base-ring filter.
3. Use a vacuum cleaner with a hose attachment to remove
any dust or debris that may have accumulated on the
filter. NOTE: If unable to inspect or clean the base-ring
filter, follow the “Cleaning the Combustion Chamber and
Flame-arrestor” instructions.
4. After the base-ring filter has been cleaned, follow the
Lighting Instructions to return the water heater to service.