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Your American Standard VAPOR SHIELD water heater is
equipped with a high temperature cut off switch that is provided
to shut down the water heater when the incoming air is
insufficient for proper combustion. If the flame guard air intake
becomes blocekd, the high temperature cut off switch and the
electrical switch will turn off the water heater. This is highly
unlikely since this high temperature cut intake becomes blocked.
If such an accident occurs however the flame guard on the bottm
of combustion chamber should be checked for blockage and the
high temperature cut off switch should be checked to determine
if it has shut off.
If switch has shut off, merely clean the flame guard per the
previous instructions and press the red reset bottom on the end
of the switch. You should thyen be able to restarte the heater
according to the start up instructions. If the water heater will not
start in this manner, procees according to the following:
Instructuons.-
1. Remove the exterior door with top seal and disconnect the harness of the flammable vapors sensor.
2. Disconnect the mainfold ad the hot surface harness from the electronic valve. Also disconect high temperature cut off
switch wires from the wire terminals on the switch.
3. Remove the 6 screws holding the burner mounting plater in the combustion chamber.
4. Slide the burner carefully out of the combustion camber taking care of not damaging the burner mounting gasket.
5. Once the burner is removed outside combustion chamer, remove the high temperatute cut off switch slipping out from the
only used for this replacement.
6. Re-install he burner with the six screw, taking care not to damage the buerner plate-mounting gasket and the hot surface
assembly.
7. Re-connect the manifold, hand tight, and then with a wrench 1/4 turn will assure connection. Re-connect the VFS and the
hot surface igniter hasrness.
8. Re-install the exterior door with the top seal.
9. Turn the gas valve on and make sure all connections are tight and no gas smell is present. Then light-on the heater according
to the aperating instructions. Once the burner is operating, check for gas leaks at the manifold nut connections with a soapy
water solution.
In the unlikely event that it would be necessary to replace either the hot surface igniter,the glow fly or the flame sensor, these
parts cannot be replaced individually therefore the entire igniter assembly should be replaced. To replace this assembly, flollow
the provided instructions for removing the burner, and for the TOD replacement.
After removing the burner assembly, unsrew the hot surface igniter from the bracket and remove the rubber grommet from the
burner mounting plate. Then push the ruber grommet into positioninside the hole in the burner mounting plate.
Re-connect the manifold, finger tight plus 1/4 turn with a wrench is sufficient. Re-connect the FVS and the hot surface harness.
Re-install the exterior door with the top seal.
Turn on the gas and make sure all connections are tight and your cannot smell gas. The light heater according to the lighting
instructions. When the burner comes on, check for leaks at the manifold but connection with a soapy water solution.
HOT SURFACE, GLOW FLY
AND
FLAME SENSOR REPLACEMENT
REPLACING THE HIGH TEMPERATURE CUT OFF SWITCH ASSEMBLY
1. Run a jumper wire across the two spade connectors on
the switch to determine if the switch is still in the open
position. A continuity tester can also be used for this
purpose.
2. If this test shows that the switch is defective, the switch
should be replaced but the FVIR feature of the heater
will still function with the jumper wire unil a new switch
can be obtained. If a gasoline spill occurs prior to the
installation of a new switch, the gasoline vapors will
be detected for the flamable vapors sensor and the
electrival switch will turn off the electrical supply and
the electronic valve will shout off the water heater.
3. To replace the high temperature cut off switch proceed
per the following.
Summary of Contents for Standard Residential
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