A.O. Smith GDV, Инструкция по эксплуатации

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23
OPERATIONAL CONDITIONS
SMELLY WATER
In each water heater there is installed at least one anode rod
(see parts section) 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 mate-
rial, and then chlorinating the water heater tank and all water
lines. Contact the local water heater supplier or service agency
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, 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 fl am-
mable 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 electri-
cal 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 fl ame near the faucet at the
time it is open.
HIGH WATER TEMPERATURE SHUT OFF SYSTEM
This water heater is equipped with an automatic gas shut-off
system. This system works when high water temperatures are
present. Turn “OFF” the entire gas supply to the water heater.
The high temperature shut-off is built into the gas control valve.
It is non-resettable. If the high temperature shut-off activates, the
gas control valve must be replaced. Contact your gas supplier
or service agency.