A.O. Smith 104 Series, Instruction Manual

Page: 34 / 56

34
F A sulfate redu F ing ba F teria whi F h has a FF umulated
within the water heater (this harmless ba F teria is
nontoxi F to humans)
d An ex F ess of a F tive hydrogen in the tank This is F aused
by the F orrosion prote F tive a F tion of the anode rod
Smelly water may be eliminated or redu F ed in some water
heater models by repla F ing the anode rod(s) with one of less
a F tive material, and then F hlorinating water heater tank and all
water lines
Conta F t the lo F al water heater supplier or servi F e agen F y for
further information F on F erning an Anode Rod Repla F ement Kit
and this F hlorination treatment
If smelly water persists after anode rod repla F ement and F hlorination
treatment, we F an only suggest that F hlorination or aeration of the
water supply be F onsidered to eliminate the water problem
Do not remove the anode rod leaving the tank unprote F ted By
doing so, all warranty on the water heater tank is voided
“AIR” IN HOT WATER FAUCETS
HYDROGEN GAS Hydrogen gas F an be produ F ed 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
À ammable and explosive To prevent the possibility of injury under
these F onditions, we re F ommend the hot water fau F et, lo F ated
farthest away, be opened for several minutes before any ele F tri F al
applian F es whi F h are F onne F ted to the hot water system are
used (su F h as a dishwasher or washing ma F hine) If hydrogen
gas is present, there will probably be an unusual sound similar to
air es
F aping through the pipe as the hot water fau F et is opened
There must be no smoking or open À ame near the fau F et at the
time it is open
HIGH WATER TEMPERATURE SHUT OFF SYSTEM
This water heater is equipped with a manual reset type high limit
(Energy Cutout) swit
F h The high limit swit F h interrupts the main
burner gas À ow should water temperature rea F h 203 ƒ F (95 ƒ C)
In the event of high limit swit F h operation, the water heater
F annot be restarted unless the water temperature is redu F ed
to approximately 120F (49C) The high limit reset button on the
front of the thermostat then needs to be depressed See Figure 2
for the lo F ation of the reset button
START UP CONDITIONS
SMOKE/ODOR
It is not un F ommon to experien F e 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
STRANGE SOUNDS
Possible noises due to expansion and F ontra F tion of some metal
parts during periods of heat-up and F ool-down do not ne F essarily
represent harmful or dangerous F onditions
Condensation F auses sizzling and popping within the burner area
during heating and F ooling periods and should be F onsidered
normal See ³ Condensation" se F tion in this manual
CONDENSATION
Whenever the water heater is ¿ lled with F old water, some
F ondensate will form while the burner is on A water heater may
appear to be leaking when in fa F t the water is F ondensation
This usually happens when
a A new water heater is ¿ lled with F old water for the ¿ rst time
b Burning gas produ F es water vapor in water heaters,
parti F ularly high ef ¿F ien F y models where À ue temperatures
are lower
F Large amounts of hot water are used in a short time and the
re ¿ ll water in the tank is very F old
Moisture from the produ F ts of F ombustion F ondense on the F ooler
tank surfa F es and form drops of water whi F h may fall onto the
burner or other hot surfa F es to produ F e a ³ sizzling ´ or ³ frying ´ noise
OPERATIONAL CONDITIONS
HOT WATER ODOR
In ea F h water heater there is installed at least one anode rod for
F orrosion prote F tion of the tank Certain water F onditions will
F ause a rea F tion between this rod and the water The most
F ommon F omplaint asso F iated with the anode rod is one of a
³ rotten egg smell ´ in the hot water The smell is a result of four
fa F tors whi F h must all be present for the odor to develop
a A F on F entration of sulfate in the supply water
b Little or no dissolved oxygen in the water
FOR YOUR INFORMATION