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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
PERIODIC MAINTENANCEPERIODIC MAINTENANCE
PERIODIC MAINTENANCEPERIODIC MAINTENANCE
PERIODIC MAINTENANCE
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. 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. Turn
“OFF” the entire gas supply to the water heater. Contact your
gas supplier or service agency.
VENTING SYSTEM INSPECTION
At least once a year a visual inspection should be made of the
venting system. You should look for:
1. Obstructions which could cause improper venting. The
combustion and ventilation air flow must not be obstructed.
2. Damage or deterioration which could cause improper
venting or leakage of combustion products.
3. Rusted flakes around top of water heater.
Be sure the vent piping is properly connected to prevent escape
of dangerous flue gases which could cause deadly
asphyxiation.
Obstructions and deteriorated vent systems may present
serious health risk or asphyxiation.
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach and process chemicals
are typical compounds which are potentially corrosive.
If after inspection of the vent system you found sooting or
deterioration, something is wrong. Call the local gas utility to
correct the problem and clean or replace the flue and venting
before resuming operation of the water heater.
BURNER INSPECTION
Flood damage to a water heater may not be readily visible or
immediately detectable. However, over a period of time a
flooded water heater will create dangerous conditions
which
can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY
DAMAGE. Contact a qualified installer or service agency to
replace a flooded water heater. Do not attempt to repair the
unit! It must be replaced!
At least once a year a visual inspection should be made of the
main burner and pilot burner, see Figure 33.
You should check for sooting. Soot is not normal and will
impair proper combustion.
Soot build-up indicates a problem that requires correction
before further use. Turn “OFF” gas to water heater and leave
off until repairs are made, because failure to correct the cause
of the sooting can result in a fire causing death, serious injury,
or property damage.
FIGURE 33.
NATURAL
PROPANE