Housekeeping; Anode Rod Maintenance; Temperature-Pressure Relief Valve Test - A.O. Smith 100 Series Installation And Operating Manual

HOUSEKEEPING

DANGER
• Do not place chemical vapor
• Do not use or store flammable
• Can cause serious injury or
INSTALLED IN SUITABLE AREA:
To ensure sufficient ventilation and combustion air supply,
proper clearances from the water heater must be maintained.
See Locating the Water Heater (page 11). Combustible
materials such as clothing, cleaning materials, or flammable
liquids, etc. must not be placed against or adjacent to the
water heater which can cause a fire.

ANODE ROD MAINTENANCE

CAUTION
Property Damage Hazard
• Avoid water heater damage.
• Inspection and replacement of anode rod required.
The anode rod is a sacrificial metal rod that helps avoid corrosion
and premature failure (leaks) in the tank. The anode rod is a
consumable item. Inspect the anode rod after the first six months
of operation when you drain and flush the tank. Replace the anode
rod if it is substantially worn out or depleted. See Figure 44 (page
46). Thereafter, inspect the anode rod annually or more frequently
if needed. If you use a water softener, your anode rod will deplete
faster than normal. Inspect the anode rod more frequently, replacing
the anode rod if it is depleted. Once the anode rod is depleted, the
tank will start to corrode, eventually developing a leak. Obtain a
new anode rod from your local plumbing supplier or have a qualified
person replace it. (Anode rods are a consumable item and are not
covered under warranty).
Certain water conditions will cause a reaction between the anode
rod and the water. The most common complaint associated with
the anode rod is a "rotten egg smell" produced from the presence
of hydrogen sulfide gas dissolved in the water. The removal of the
anode rod requires a 1-1/16" socket.
Important: Do not operate the water heater without a functioning
anode rod as this will void any warranties. A special
anode rod may be available if water odour or
discolouration occurs.
Note: This rod may reduce but not eliminate water odour problems.
The water supply system may require special filtration
equipment from a water conditioning company to successfully
eliminate all water odour problems.
Remove the anode rod for inspection at least once per year. To
replace the anode:
Fire and Explosion Hazard
emitting products near air intake
and exhaust terminations.
vapor products such as gaso-
line, solvents or adhesives in the
same room or area near water
heater or other appliance.
death.
1. Turn "OFF" the electrical supply to the water heater.
2. Turn "OFF" the gas supply at the Main Gas shut-off Valve.
3. CLOSE the cold-water inlet valve to the water heater.
4. OPEN a nearby hot-water faucet and leave open to allow for
draining.
5. Drain approximately 19l (5 gallons) of water from tank. See
Draining and Flushing for proper procedures. Close drain valve.
6. Remove old anode rod.
7. Use Teflon ® tape or approved pipe sealant on threads and install
new anode rod.
Remove the hose and follow instructions in the Filling the Water
8.
Heater (page 42).
Follow the lighting instructions on the label or see Lighting The
9.
Water Heater (page 42) to restart the water heater.
See Anode Rod Maintenance (page 46) for anode rod location.
Figure 44. Anode Rod Depletion

TEMPERATURE-PRESSURE RELIEF VALVE TEST

It is recommended that the Temperature-Pressure Relief Valve be
checked every 6 months to ensure that it is in operating condition.
When checking the Temperature-Pressure Relief Valve operation,
make sure that (1) no one is in front of or around the outlet of the
Temperature-Pressure Relief Valve discharge line, and (2) that the
water discharge will not cause any property damage, as the water
may be extremely hot. Use care when operating valve as the valve
may be hot.
DANGER
HOT
HOT
BURN
To check the temperature-pressure relief valve, lift the lever at the
end of the valve several times (see Figure 45). The valve should
seat properly and operate freely.
If after manually operating the valve, it fails to completely reset and
continues to release water, immediately close the cold water inlet to
the water heater and drain the water heater. See Draining and Flushing
(page 44). Replace the Temperature-Pressure Relief Valve with
a properly rated/sized new one. See Temperature-Pressure Relief Valve
(page 31) for instructions on replacement.
46
• Burn hazard.
• Hot water discharge.
• Keep clear of tempera-
ture-pressure relief valve
discharge.