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Piezoelectric Igniter System
The piezoelectric igniter system is part of the Flame
Lock TM safety system and consists of the igniter button,
electrode and wire. The pilot is ignited by an electric
spark generated when the igniter button is pressed. The
spark gap of 0.125 inch is set when the electrode is
installed at the factory. (See Figure 27Aand 27B). Use
only factory authorized Flame Lock TM safety system
piezoelectric igniter parts for replacement.
Figure 27A
Natural Gas igniter Assembly
Igniter /._ Thermocouple
_4/-I°°"°" //P,,O,_ /
ec', ode Eiectro0e
iSnap-on Connector
Figure 27B
LP. IgniterAssembty
Pilot
ThermocouplePilot _
-- Snap-on Connector
Testing the Igniter System
Turn off the gas to the water heater at the manual gas
shut-off valve. Watch the electrode tip while activating
the igniter.A visible spark should jump from the
electrode. To avoid shock, do not touch the burner or
any metal part on the pilot or pilot assembly. If no spark
is visible, check the wire connections and make sure
the electrode is not broken. Replace the igniter if
defective. Dirt and rust on the pilot or electrode tip can
prevent the igniter spark. Wipe clean with a damp cloth
and dry completely. Rust can be removed from the
electrode tip and metal surfaces by lightly sanding with
an emery cloth or fine grit sandpaper.
Removing and Replacing the Gas
Control Valve/Thermostat
Important: The gas control valve/thermostat is a
standard valve with a left hand thread thermocouple
that is unique to the Flame Lock TM safety system. Use
only factory authorized replacement parts.
1. On the gas control valve/thermostat turn the
temperature dial counterclockwise to its lowest
setting. Turn the gas control knob clockwise to the
"OFF" position (Figure 19).
2. Turn off the gas at the manual shut-off valve on the
gas supply pipe (Figure 3).
3. Drain the water heater. Refer to the section of
"Draining and Flushing" on page 20 and follow the
procedure.
4. Disconnect the igniter wire from the igniter button.
Remove the igniter button by depressing front and
rear holding tabs and lift. Remove igniter bracket.
Disconnect the thermocouple (left hand threads),
pilot tube, and manifold tube at the thermostat
(Figure 21). Note: L. P.gas systems use
reverse(left-hand) threads on the manifold tube.
5. Refer to "Gas Piping" (Figure 3) and disconnect the
ground joint union in the gas piping. Disconnect the
remaining pipe from the gas valve/thermostat.
Important: When removing the gas control
valve/thermostat do not use pipe wrench or vise to grip
body. Do not insert any type of blunt instrument into the
inlet or outlet connections. Using these type tools may
result in damage to the gas control valve/thermostat.
6. Turn the gas control valve/thermostat
counterclockwise. Remove the gas control
valve/thermostat.
To replace the gas control valve/thermostat reassemble
in reverse order. The gas control valve/thermostat is a
standard valve with a left hand thread thermocouple
that is unique to the Flame Lock TM safety system. Use
only factory authorized replacement parts.
• Be sure to use approved Teflon tape or pipe joint
compound on the gas piping connections and fitting
on the back of gas valve that screws into tank.
,, Be sure to remove the pilot ferrule nut from the new
gas control valve/thermostat.
Turn gas supply on and check for leaks. Use a
chloride-free soap and water solution (bubbles
forming indicate a leak) or other approved method.
,, Be sure tank is completely filled with water before
lighting and activating the water heater. Follow the
"Lighting Instructions" on page 17.
If additional information is required, contact the
Service Department at: 1-877-817-6750.
24
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