Installation Guide

24
REPLACEMENT PARTS
IMPORTANT: The following maintenance procedures should be
performed by a quali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. Disconnect the thermocouple (right-hand thread), pilot tube,
the ignitor wire from the ignitor button, and manifold tube at the
thermostat (Figure 21).
5. Remove the four screws at corners and the two sets of nuts
and clips in the middle securing the burner door assembly to
the combustion chamber (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.
FIGURE 21
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.
Burner Pilot Assembly
Use brush on this surface
Natural Gas (Low Nox)
Burner Door Assembly
FIGURE 22
Replacing the Pilot Assembly:
1. Follow the instructions in “Removing the Burner Door
Assembly” section to remove the assembly.
2. Remove the screw securing the pilot assembly to the
burner and keep it for reuse later.
3. Remove the old pilot assembly (including the ignitor
wire) from the burner door assembly.
4. Use the screw removed previously step to secure the
new pilot assembly to the burner.
5. Insert the ignitor wire, pilot tube and thermocouple
through the hole in the burner door. Secure the grommet
through the hole in the burner door and make sure good
seal.
6. Follow the instructions in “Replacing the Burner Door
Assembly” section to reinstall the assembly.
REPLACING PARTS