64
. Service and Maintenance
(continued)
Figure 25: Igniter Electrode Assembly
2. Igniter electrode and UV Scanner
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.
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
; 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.
g.
Inspect ultra-violet (uv) scanner lens and remove
any debris with soft cloth and make sure the hole
is clear from scanner to burner.
DANGER
DANGER
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.
!
WARNING
WARNING
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 alumi
-
na, silica, heavy metals, carbon monoxide, nitrogen
oxides, aldehyde and/or other toxic or harmful sub
-
stances 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 instruc
-
tions, including all those contained in component
manufacturers manuals which are provided with
the appliance before installing, starting up, oper
-
ating, 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.
!
0.17" (4.5 mm)
Figure 26: Igniter Electrode Gap
Graphite Gasket
