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Removing
and Replacing
the Gas Control Valve/Thermostat
IMPORTANT: The gas control valve/thermostat is a standard
valve with wire leads that connect to a thermal switch.
Removing the Gas Control Valve/Thermostat:
1.
Turn the gas control/temperature
knob
to the "OFF"
position See the "Lighting Instructions" on the front of the
water heater or in this manual.
2.
Turn off the gas at the manual shut-off valve on the gas
supply pipe (Figure 11).
3.
Drain the water heater. Refer to the section of "Draining and
Flushing" and follow the procedure.
4.
Disconnect the igniter wire from the igniter lead wire. Use
needle nose pliers to disconnect the red (+) and white (-)
thermopile wires.
Disconnect
pilot tube (7/16" wrench) and
manifold tube (3/4" wrench) at the gas control valve/thermostat
(Figure 33). NOTE: L.P. Gas systems use reverse (left-hand)
threads on the manifold tube.
5.
Refer to "Gas Piping" (Figure 11) and disconnect the ground
joint union in the gas piping. Disconnect the remaining pipe
from the gas control valve/thermostat.
6.
To remove
the gas control
valve/thermostat,
thread a
section of 4" gas pipe into the inlet and use it to turn the
gas control valve/thermostat
(counterclockwise.)
Do not
use pipe wrench or equivalent to grip body. Damage may
result, causing leaks. Do not insert any sharp objects into
the inlet or outlet connections.
Damage to the gas control
valve/thermostat
may result.
Gas Control Valve/Thermostat:
To replace the gas control valve/thermostat,
reassemble
in
reverse order. When replacing the gas control valve/thermostat,
thread a section of 4" gas pipe into the inlet and use it to turn
the gas control valve/thermostat
(clockwise.) DO NOT OVER
TIGHTEN, damage may result.
•
Be sure
to use approved
Teflon@ tape
or pipe joint
compound on the gas piping connections and fitting on the
back of the gas control valve that screws into tank.
•
Be sure to remove the pilot ferrule nut from the new gas
control valve/thermostat.
•
Turn the gas supply on and check for leaks. Test the water
heater by brushing
on an approved
noncorrosive
leak
detection solution or a mixture of hand dish washing soap
and water (one part soap to 15 parts water) or chitdrens
soap bubble solution.
Bubbles forming
indicate
a leak.
Correct any leak found.
•
Check
the
operation
of the burner
by following
the
"Lighting Instructions" on the front of the water heater or
in this manual. With the burner tit, check the gas control
valve thermostat supply line, manifold tube and pilot tube
connections for leaks. Use an approved noncorrosive leak
detection solution or a mixture of hand dish washing soap
and water (one part soap to 15 parts water) or chitdrens
soap bubble solution.
Bubbles forming
indicate
a leak.
Correct any leak found.
•
Be sure tank is completely filled with water before lighting
and
activating
the water
heater.
Follow
the "Lighting
Instructions"
on the front of the water heater or in this
manual.
•
If additional
information
is required,
Contact
Sears at
1-800-4-MY-HOME
(1-800-469-4663).
TEFLON ® is a registered trademark of E.I. Du Pont De Nemours
and Company.
FVIR System
Operational
Checklist
1.
Manifold gasket properly sealed.
2.
Viewport not damaged or cracked.
3.
Flame-arrestor free of debris and undamaged.
4.
Manifold component block properly installed.
5.
No leaks at pilot and manifold connection.
6.
Manifold door screws securely tightened.
7.
Depress the button on the thermal switch.
33
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Table of Contents
Troubleshooting
