American Water Heater (A)BCG3 85T500-8N - Manual (Page 31)

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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.
high water temperature shut off system
This water heater is equipped with an automatic reset type high
limit (energy Cutoff) sensor. The high limit switch interrupts
the main burner gas flow should the water temperature reach
203°F (95°C).
The high limit will automatically reset when the water temperature
drops below 120°F (49°C). After cooling the tank temperature,
turn off the water heater for at least 10 seconds by using the
switch on front of the control box. Turn on the water heater. If
this fails to correct the problem, contact your plumber or service
representative.
further information regarding anode replacement 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
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