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START UP CONDITIONS
THERMAL
EXPANSION
Property
Damage
Hazard
• Avoid water
heater damage.
. Install thermal
expansion
tank or device
if necessary.
• Contact
qualified
installer
or service
agency.
"AIR" IN HOT WATER FAUCETS
}.--\
Explosion
Hazard
• Flammable
hydrogen
gases may be present.
• Keep all ignition sources
away
from
faucet
when
turning
on hot water.
Water supply
systems
may, because
of such events
as high line
pressure, frequent cut-offs, the effects of water hammer among others,
have installed devices such as pressure reducing valves, check valves,
back flow preventers,
etc. to control these types of problems.
When
these devices are not equipped with an internal by-pass, and no other
measures are taken, the devices cause the water system to be closed.
As water is heated, it expands (thermal expansion)
and closed systems
do not allow for the expansion
of heated water.
The water within the water heater tank expands
as it is heated and
increases
the pressure
of the water system.
If the relieving
point of
the water heater's temperature-pressure
relief valve is reached, the
valve will relieve the excess pressure.
The temperature-pressure
relief
valve
is not intended
for the constant
relief
of thermal
expansion.
This is an unacceptable
condition and must be corrected.
It is recommended
that any devices installed
which could create a
closed system have a by-pass and/or the system have an expansion
tank or device to relieve the pressure built by thermal expansion
in the
water system.
Expansion
tanks are available
for ordering through a
local plumbing
contractor.
Contact the local water supplier
or Sears
Service
Center for assistance
in controlling
these situations.
STRANGESOUNDS
Possible
noises
due to expansion
and contraction
of some metal
parts during periods
of heat-up
and cool-down
do not necessarily
represent
harmful
or dangerous
conditions.
OPERATIONAL
CONDITIONS
WATER ODOR
In each water heater there is installed
at least one anode rod (see
parts sections)
for corrosion
protection
of the tank. Certain
water
conditions
will cause a reaction
between
this rod and the water.
The most common
complaint
associated
with the anode rod is one
of a "rotten egg smell" in the hot water. This odor is derived
from
hydrogen
sulfide gas dissolved
in the water. The smell is the result
of four factors which must all be present for the odor to develop:
A. A concentration
of sulfate
in the supply water.
B. Little or no dissolved
oxygen
in the water.
C. A sulfate
reducing
bacteria
which
has accumulated
within the
water heater (this harmless
bacteria
is nontoxic
to humans).
D. An excess of active hydrogen
in the tank. This is caused
by the
corrosion
protective
action of the anode.
Smelly water may be eliminated
or reduced
in some water heater
models by replacing the anode(s) with one of less active material, and
then chlorinating thewater
heater tank and all hot waterlines.
Contact
the local Sears Service
Center for further information
concerning
an
Anode Replacement
Kit and this chlorination
treatment.
If the smelly
water persists after the anode replacement
and chlorination treatment,
we can only suggest that chlorination
or aeration of the water supply
be considered
to eliminate the water problem.
Do not remove
the anode leaving
the tank unprotected.
By doing
so, atl warranty
on the water
heater tank
is voided.
HYDROGEN
GAS: Hydrogen
gas can be produced
in a hot water
system that has not been used for a long period of time (generally
two weeks
or more).
Hydrogen
gas is extremely
flammable
and
explosive.
To prevent the possibility
of injury under these conditions,
we recommend
the hot water faucet, located farthest away be opened
for several
minutes
before
any electrical
appliances
which
are
connected
to the hot water system are used (such as a dishwasher
orwashing
machine).
Ifhydrogen
gasis
present, therewill
probably
be an unusual
sound similar to air escaping
through the pipe as the
hot water faucet
is opened.
There must be no smoking
or open
flame near the faucet at the time it is open.
HiGH WATER TEMPERATURE SHUT OFF SYSTEM
A non-adjustable
high temperature
limit control
operates
before
steam temperatures
are reached. The high limit switch must be reset
manually when it operates. BECAUSE
THE HIGH LIMIT OPERATES
ONLY
WHEN
ABNORMALLY
HIGH
WATER
TEMPERATURES
ARE
PRESENT,
IT
IS
IMPORTANT
THAT
A
QUALIFIED
SERVICE
AGENT
BE
CONTACTED
TO
DETERMINE
THE REASON
FOR OPERATION
BEFORE
RESETTING.
*Before
removing
any
access
panels
or servicing
the
water
heater, make sure the electrical
supply
to the water
heater
is
turned "OFF."
, Failure to do this could result in
death,
serious bodily
injury, or
property damage,
16
• Turn off and unpluq
the water
heater. Do not attempt
to reset
thermostat
with power on.
• Remove
the front
panel,
see "Removing
Front
Panel"
in the
Periodic
Maintenance
section.
• Remove the insulation
to expose
the reset button.
• Reset the high limit by pushing
in the red button.
• Replace the insulation
so that it completely
covers the thermostat
and element.
• Replace the front panel.
• Plug in and turn on the water heater.
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