Emergency Instructions; Routine Preventative Maintenance - Rheem Commercial Point-of-Use Electric Water Heater Use & Care Manual

cover SHOULD NOT be removed . (Refer to Fig. 4.) Press red
"RESET" button. Replace insulation and jacket access panel before
turning on power to water heater.
3. EMERGENCY INSTRUCTIONS —
!
WARNING
If water heater has been subjected to flood,fire,or physical damage,
turn off power and water to water heater. Do not operate the water
heater again until it has been thoroughly checked by qualified service
personnel.
4. LONG TIME SHUT-DOWN — If the water heater is to remain idle for an
extended period of time, the power and water to the water heater should
be turned off to conserve energy. The water heater and piping should be
drained if they might be subjected to freezing temperatures.
NOTE: Refer to "Hydrogen Gas Caution" in Safety Precautions
Section on page 6.
After a very long shut-down period, the water heater's operation and
controls should be checked by qualified service personnel. Make certain
the water heater is completely filled before again placing it in operation .
5. DRAINING HEATER —
!
CAUTION
Shut off power to water heater before draining water.
Properly maintained, your water heater will provide years of dependable
trouble-free service. It is suggested that a routine preventive maintenance
program be established and followed by the user. It is further recommended
that a periodic inspection of the operating controls, heating element and wiring
should be made by service personnel qualified in electric appliance repair.

1. ROUTINE PREVENTATIVE MAINTENANCE

A. Most electrical appliances make some sound when in operation, even
when new. If the hissing or singing sound level increases excessively, the
electric heating element may require cleaning. Contact your installer or
plumbing contractor to inspect.
B. The area near the water heater must be kept free of flammable liquids such
as gasoline or paint thinners, adhesives or other combustible materials.
C. At least once a year, lift and release the lever handle on the temperature
pressure relief valve, located near the top of the water heater, to make
certain the valve operates freely and allow several gallons to flush through
discharge line. Make certain the discharged water is directed to an open
drain.
!
DANGER
Before manually operating the relief valve, make certain no one will be
exposed to the danger of coming in contact with the hot water released by
this valve. The water may be hot enough to create a SCALD hazard. The
water released should be directed to a suitable drain to prevent injury or
damage.
Operation
In order to drain water heater, turn off cold water supply, then it is
necessary to open a hot water faucet or lift the handle on the relief valve
to admit air to the tank. Attach a garden hose to the drain valve on the
water heater and direct the stream of water to a drain where it will do no
damage.
!
DANGER
The water drained from the tank may be hot enough to present a
SCALD HAZARD and should be directed to a suitable drain to prevent
injury or damage.
6. ANODE — This water heater is equipped with an anode rod designed to
prolong the life of the glass lined tank. The anode is slowly consumed
cathodically, thereby eliminating or minimizing corrosion of the glass lined
tank.
Water sometimes contains a high sulfate and/or mineral content and
together with the cathodic protection process can produce a hydrogen
sulfide or rotten egg odor in the heated water. Chlorination of the water
supply should minimize the problem.
NOTE: Do not remove the anode rod from the water heater's tank,
except for inspection and/or replacement, as operation with the
anode rod removed will shorten the life of the glass lined tank and
will exclude warranty coverage.
Maintenance
NOTE: If the temperature and pressure relief valve on the water heater
discharges periodically, this may be due to thermal expansion in a
"Closed" water system. Contact the water supplier or your plumbing
contractor on how to correct this. DO NOT plug the relief valve outlet.
D. A water heater's tank can act as a settling basin for solids suspended in the
water. It is, therefore, not uncommon for hard water deposits to accumulate
in the bottom of the tank. It is suggested that a few quarts of water be
drained from the water heater's tank through the drain valve every month
to clean the tank of these deposits.
E. Rapid closing of faucets or solenoid valves in automatic water using
appliances can cause a pounding "water hammer" sound. "Water hammer"
can be described as a banging noise heard in a water pipe following an
abrupt alteration of the flow with resulting pressure surges. Strategically
located risers in the water pipe system can be used to minimize the
problem. Also water hammer arresting devices are usually available from
your plumber or local plumbing supply store.
2. ANODE ROD INSPECTION — The anode rod should be removed from
the water heater's tank annually for inspection and replaced when more
than 6" of core wire is exposed at either end of the rod. Refer to Fig. 2 for
anode rod location. Make certain cold water supply is turned off before
removing anode rod.
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