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14

Routine Preventative Maintenance

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.

Most electrical appliances, even when
new, make some sound when in
operation. If the hissing or singing
sound level increases excessively, the
electric heating element may require
cleaning. Contact a qualified installer or
plumbing contract to inspect.

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. Allow several
gallons to flush through the discharge
line to an open drain.

A water heater’s tank can act as a
setting 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 every month
to clean the tank of these deposits.

Rapid closing of faucets or solenoid
valves in automatic water using
appliances can cause a banging noise
heard in a water pipe. Strategically
located risers in the water pipe system
or water hammer arresting devices can
be used to minimize the problem.

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. 

Make sure the cold water supply is
turned off before removing anode rod.

NOTICE: 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 .

Care and cleaning of the water heater.

Draining the Water Heater

CAUTION: Shut off power to the

water heater before draining water.

DANGER: Before manually operating

the relief valve, make certain no one will
be exposed to the hot water released
by the valve. 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.

In order to drain the water heater, turn
off the cold water supply. 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. Open the
valve.

Vacation and Extended Shut-Down

If the water heater is to remain idle for an
extended period of time, the power and
water to the appliance should be turned
off to conserve energy and prevent a
build-up of dangerous hydrogen gas.

The water heater and piping should be
drained if they might be subjected to
freezing temperatures.

After a 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 again before placing it 
in operation.

NOTICE: Refer to the
Hydrogen Gas Caution in
the Operating Instructions.

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 the valve. The
water may be hot enough
to create a scald hazard.
The water should be
released into a suitable
drain to prevent injury or
property damage. 

NOTICE: If the temperature
and pressure relief valve 
on the hot 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. 

Customer Service

T

roubleshooting Tips

Care and Cleaning

Operating Instructions

Installation Instructions

Safety Instructions

Summary of Contents for AP12170-4

Page 1: ...carefully so that they may understand how to perform these operations Do not destroy this manual Please read carefully and keep in a safe place for future reference Recognize this symbol as an indicat...

Page 2: ...ip or cancelled check here Proof of the original purchase date is needed to obtain service under the warranty IMPORTANT Fill out and return the Consumer Product Registration Card that is in the back o...

Page 3: ...e Operating Instructions in this manual for detailed instructions in how to adjust the thermostat s DANGER Hotter water increases the Potential for Hot Water SCALDS D A N G E R HOT Water temperature o...

Page 4: ...rom Office of the State Architect 400 P Street Sacramento CA 95814 or you may call 916 324 5315 or ask a water heater dealer However applicable local codes shall govern installation For residential wa...

Page 5: ...d to permit inspection and servicing such as removal of elements or checking controls The water heater and water lines should be protected from freezing temperatures Do not install the water heater in...

Page 6: ...ld water inlet line can cause what is referred to as a closed water system A cold water inlet line with no check valve or back flow prevention device is referred to as an open water system As water is...

Page 7: ...of the relief valve and discharge line The end of the discharge line should not be threaded or concealed and should be protected from freezing No valve of any type restriction or reducer coupling shou...

Page 8: ...jacket at the top front of the water heater An opening for 1 2 or 3 4 electrical fitting is provided for field wiring connections The voltage requirements and wattage load for the water heater are spe...

Page 9: ...ternal insulation blanket to this water heater pay careful attention to the following so as not to restrict the proper function and operation of the water heater Do not cover the temperature and press...

Page 10: ...opening of the T P Valve R E L I E F V A L V E COLD HOT Typical top connection arrangement Typical side connection arrangement Relief Valve Insulation Installation CAUTION Ensure the T P Valve openin...

Page 11: ...Provisions made to protect area from water damage Sufficient room to service heater Water Supply Water heater completely filled with water Air purged from water heater and piping Water connections tig...

Page 12: ...h as air escaping through the pipe as the water begins to flow Do not smoke or use an open flame near the faucet at the time it is open CAUTION The cause of the high temperature condition must be inve...

Page 13: ...n be regulated by setting the temperature dial of the adjustable surface mounted thermostat s located behind the jacket access panel s Dual element heaters have two thermostats Safety and energy conse...

Page 14: ...shorten the life of the glass lined tank and will exclude warranty coverage Care and cleaning of the water heater Draining the Water Heater CAUTION Shut off power to the water heater before draining w...

Page 15: ...connect switch if used are in the ON position The thermostat may See the Temperature regulation of the water heater be set set too low section of this manual Leaking or open hot Make sure all faucets...

Page 16: ...T attempt repair of electrical wiring thermostat s heating elements or other operating controls Refer repairs to qualified service personnel Relief valve Junction box cover Anode rod Hot outlet heat t...

Page 17: ...til it breaks away from the remainder of the cavity insert See illustration to the left Discard the crossbar It cannot and need not be replaced Replace the thermostat and or element as necessary Repla...

Page 18: ...X 4 L2 RED 1 3 2 UPPER THERMOSTAT HIGH TEMP LIMIT ECO UPPER HEATING ELEMENT BLUE YELLOW BLACK L1 G BRANCH CIRCUIT TO ELECTRICAL DISTRIBUTION PANEL 240 V JUNCTION BOX 4 L2 RED 1 3 1 2 BLACK RED BLACK L...

Page 19: ...19 Rheem Manufacturing Company Warranty Registration Department P O Box 34070 Louisville KY 40232 4070 Please place in envelope and mail to Cut here Cut here...

Page 20: ...Mr Ms Mrs Miss Street Address City State Date Placed In Use Month Day Year Zip Code Apt Last Name Phone Number _ _ Complete and mail this Consumer Product Ownership Registration today After mailing th...

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