State SHE50 100 - Manual (Page 45)

45
start up condItIons
sMoKe/odor
It is not uncommon to experience a small amount of smoke and odor
during the initial start-up. This is due to burning off of oil from metal
parts, and will disappear in a short while.
therMal eXpansIon
As water is heated, it expands (thermal expansion). In a closed
system the volume of water will grow when it is heated. As the
volume of water grows there will be a corresponding increase in
water pressure due to thermal expansion. Thermal expansion can
cause premature tank failure (leakage). This type of failure is not
covered under the limited warranty. Thermal expansion can also
cause intermittent Temperature-Pressure Relief Valve operation:
water discharged from the valve due to excessive pressure build
up. This condition is not covered under the limited warranty. The
Temperature-Pressure Relief Valve is not intended for the constant
relief of thermal expansion.
A properly sized thermal expansion tank must be installed on all
closed systems to control the harmful effects of thermal expansion.
Contact a local plumbing service agency to have a thermal
expansion tank installed.
operatIonal condItIons
sMellY water
In each water heater there is installed at least one anode rod (see
Figure 1) 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. The smell is a 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 the water heater tank and all water lines. Contact
the local water heater supplier or a qualified service agency for
further information concerning an Anode Replacement Kit and this
chlorination treatment.
If the smelly water persists after the anode rod 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 rod leaving the tank unprotected. by
doing so, all warranty on the water heater tank is voided.
“aIr” In hot water faucets
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 or washing machine). If hydrogen gas is present, there
will 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.
for Your InforMatIon