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XV. Service and Maintenance (continued)
2. Igniter Electrode
a. Disconnect power to the unit and remove ignition
electrode from the burner door.
b. Visually inspect igniter assembly (ceramic
insulators, bracket, and graphite gasket) for
damage. Replace igniter assembly if the electrodes
are deformed or ceramic insulators are cracked.
Figure 34: Igniter Electrode Assembly
Figure 35: Igniter Electrode Gap
c. Remove any excess oxide deposits from the
surface of the igniter with steel wool or emery
cloth. Do not use sandpaper.
d. Ensure there is a 0.17" (4.5 mm) gap between the
tips of the electrode.
e. Install igniter electrode in the orientation shown
in Figure 34; otherwise, the unit will not light.
f.
After reinstalling the igniter, make sure there is
a ⅜ inch gap between the igniter and the burner
surface.
3. UV Scanner/ Flame Sensor
Graphite Gasket
0.17" (4.5 mm)
!
This appliance uses flammable gas, high voltage
electricity, moving parts, and very hot water under
high pressure. Ensure that all gas and electric power
supplies are off and that the water temperature is
cool before attempting any disassembly or service.
Do not attempt any service work if gas is present in
the air around the appliance. Never modify, remove
or tamper with any control device.
!
This appliance contains components that become
very hot when the operating. Do not touch any
components unless they are cool.
This appliance contains materials of construction,
products of combustion and the fuel contain
alumina, silica, heavy metals, carbon monoxide,
nitrogen oxides, aldehyde and/or other toxic or
harmful substances which can cause death or
serious injury and which are known to the state
of California to cause cancer, birth defects and
other reproductive harm. Always use proper safety
clothing, respirators, and other safety equipment
when servicing or working near the appliance.
Failure to follow all instructions in the proper
order can cause personal injury or death. Read
all instructions, including all those contained in
component manufacturers manuals which are
provided with the appliance before installing,
starting up, operating, maintaining, or servicing.
All cover plates, enclosures and guards must be in
place at all times.
If any controls are replaced, they must be replaced
with identical models.
If any electrical wires are disconnected during
service, clearly label the wires and assure that the
wires are reconnected properly.
Never jump out or bypass any safety or operating
control or component.
Interior of the venting system must be inspected
and clean before the initial startup and should be
inspected periodically for any obstructions.
75
DANGER
DANGER
WARNING
WARNING
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