State SBV 65 10TS User Manual download pdf (Page 12)

Operational Conditions

Anode Rod/Water Odor

Each water heater contains at least one anode rod, which

will slowly deplete (due to electrolysis) prolonging the life

of the water heater by protecting the glass-lined tank from

corrosion. Adverse water quality, hotter water temperatures,

high hot water usage, hydronic heating devices, and water

softening methods can increase the rate of anode rod

depletion. Once the anode rod is depleted, the tank will start

to corrode, eventually developing a leak.

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 sulﬁ de gas

dissolved in the water. IMPORTANT: Do not remove this

anode rod permanently as it will void any warranties.

A special anode rod may be available if water odor or

discoloration occurs. NOTE: This anode rod may reduce

but not eliminate water odor problems. The water supply

system may require special ﬁ ltration equipment from a water

conditioning company to successfully eliminate all water odor

problems.

Artiﬁ cially softened water is exceedingly corrosive because

the process substitutes sodium ions for magnesium and

calcium ions. The use of a water softener may decrease the

life of the water heater tank.

The anode rod should be inspected after a maximum of

three years and annually thereafter until the condition of

the anode rod dictates its replacement. NOTE: Artiﬁ cially

softened water requires the anode

rod to be inspected annually.

The following are typical (but not all)

signs of a depleted anode rod:

• The majority of the rods

diameter is less than 3/8”.

• Significant sections of the

support wire (approx. 1/3 or

more of the anode rod’s length)

are visible.

If the anode rod shows signs of

either or both it should be replaced.

NOTE: Whether reinstalling or

replacing the anode rod, check for

any leaks and immediately correct if

found.

In replacing the anode:

1. Turn off power to the water

heater.

2. Shut off the water supply and open a nearby hot water

faucet to depressurize the water tank.

3. Drain approximately 5 gallons of water from tank

(Refer to the “Draining and Flushing” section for proper

procedures). Close drain valve.

4. Remove old anode rod.

5. Use Teflon

tape or approved pipe sealant on threads

and install new anode rod.

6. Turn on water supply and open nearby hot water faucet

to purge air from water system. Check for any leaks and

immediately correct any if found.

7. Restart the water heater as directed under the

“Operating Your Water Heater” section. See the “Repair

Parts Illustration” section for anode rod location.

TEFLON is a registered trademark of E.I. Du Pont De Nemours and Company.

Water Heater Sounds

During the normal operation of the water heater, sounds or

noises may be heard. These noises are common and may

result from the following:

1. Normal expansion and contraction of metal parts

during periods of heat-up and cool-down.

2. Sediment buildup in the tank bottom will create

varying amounts of noise and may cause premature

tank failure. Drain and flush the tank as directed under

the “Draining and Flushing” section.

Stratiﬁ cation

Temperature stratiﬁ cation may occur as water from the

solar collectors ﬂ ows into the water heater tank. Since

this water may be hotter than the thermostat setting, the

temperature at the hot water outlet may be higher than

expected. An anti-scald device is recommended in the hot

water supply line to reduce the risk of scald injury.

Figure 13:

Anode Rod Depletion

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State SBV 65 10TS User Manual Page 12

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