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8

3. Using a flat tip screwdriver, rotate the adjusting knob to the

desired temperature setting.

4. Replace the covers and access panels, and turn on heater

electrical supply.

Valves for reducing point-of-use temperature by mixing cold and
hot water are available (See Figure 5). Also available are
inexpensive devices that attach to faucets to limit hot water
temperatures.  Contact a licensed plumber or the local plumbing
authority.

A non-adjustable high temperature limit control operates before
steam temperatures are reached.  The high limit is in the same
area as the upper thermostat and must be reset manually when
it operates.  

BECAUSE THE HIGH LIMIT OPERATES ONLY

WHEN ABNORMALLY HIGH WATER TEMPERATURES ARE
PRESENT, IT IS IMPORTANT THAT A QUALIFIED SERVICE
AGENT BE CONTACTED TO DETERMINE THE REASON FOR
OPERATION BEFORE RESETTING.

FIGURE 5

DRAINING

If the heater is to be shut down and exposed to freezing
temperatures, it must be drained.  Water, if left in the tank and
allowed to freeze, will expand and damage the heater.

1. Turn off the electrical switch and cold water inlet valve.

If desired, a hose may be connected to the drain valve
to carry the water away.

2.  Open a nearby hot water faucet and the heater drain

   valve.

Be careful to grasp the drain valve handle in such a
way that the hand will not be exposed to hot water.

3. The drain valve must be left open during the shutdown

period.

To restart heater, refer to the foregoing FILLING
instructions.

MAINTENANCE

Electric water heater maintenance consists of cleaning the tank
and removing lime (or scale) from the heating elements in hard
water areas.  Tank flushing should be performed monthly.  Tank
sediment removal and element lime scale removal must be
performed when needed as determined by periodic inspections.
Your dealer should be contacted for element cleaning.  In some
instances a hissing sound may be heard as the scale builds up.
This noise is normal.

Once a month the temperature and pressure relief valve should
be checked to ensure that it is in operating condition.  Lift the
lever on the valve several times until the valve seats properly and
operates freely.

  CAUTION

THE WATER PASSING OUT OF THE VALVE DURING THIS
CHECKING OPERATION MAY BE EXTREMELY HOT.

It is recommended that the drain valve on this unit be opened
once a month and 1 to 2 gallons of water be allowed to drain out.
This will help to prevent sediment buildup in the tank bottom.

ANODE ROD MAINTENANCE

The anode rod is used to protect the tank from corrosion.  Most
hot water tanks are equipped with an anode rod.  The submerged
rod sacrifices itself to protect the tank.  Instead of corroding the
tank, water ions attack and eat away the anode rod.  This does
not affect the water's taste or color.  The rod must be maintained
to keep the tank in operating condition.  Failure to inspect and/or
replace the anode rod will result in voiding the warranty.

Anode deterioration depends on water conductivity, not
necessarily water condition.  It may be necessary to have the
anode rod inspected a few times during the first year to see what
effect the water has had.  A corroded or pitted anode rod, in the
first year, indicates high water conductivity and should be checked
and or replaced more often than an anode rod that appears to
be fairly clean.  Inspection should be conducted by a qualified
technician.

REPLACEMENT PARTS

Replacement parts may be ordered through dealers, authorized
servicers or distributors.  Refer to Yellow Pages for where to call
or contact the Product Service Division, 5621 W. 115th Street,
Alsip, IL 60803, 1-800-433-2545.  When ordering parts, specify
complete model number, serial number, (see rating plate),
quantity and name of part desired.  Standard hardware items
should be purchased locally.

TROUBLESHOOTING

CHECKLIST

Before contacting your dealer, check the water heater to see if
the apparent malfunction is caused by some external fault.
Consulting this checklist may eliminate the need for a repair call
and restore hot water service.

NOT ENOUGH OR NO HOT WATER

1.  Be certain that the water heater electrical switch is turned to

the ON position.

In some areas an additional special meter, controlled
by a timer, is used to govern the periods electricity is
available.  If the heater operates on a timed electrical
circuit, recovery will be limited to certain hours.

2.  Check for loose or blown fuses in the water heater circuit.

3.  If the water has been excessively hot and is now cold, the high

temperature limit control may have operated.  To restore

Summary of Contents for DEL

Page 1: ...tion Maintenance Leakage Checkpoints Limited Warranty A DIVISION OF A O SMITH CORPORATION McBee South Carolina USA www hotwater com CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIV...

Page 2: ...38 128 115 110 5000 5000 GPH 113 101 75 68 56 51 45 41 38 34 32 10 LPH 426 384 284 256 213 192 170 153 142 128 122 6000 6000 GPH 135 122 90 81 68 61 54 49 45 41 39 12 LPH 511 460 341 307 256 230 205 1...

Page 3: ...ot cover the instruction manual Keep it on the side of the water heater or nearby for future reference Do obtain new labels from A O Smith for placement on the blanket directly over the existing label...

Page 4: ...electrician size the branch circuit at 125 percent of the heater rating and further increase wire size as necessary to compensate for voltage drop in long runs CALCULATING AMPERAGE OVERCURRENTPROTECTI...

Page 5: ...2 12 2 THW T TW THWN XHHW UF USE 12 15 15 10 25 25 8 30 40 6 40 50 4 55 65 3 65 75 2 75 90 1 85 100 FACTORY WIRED FIELD WIRING WHITE FOR 120V For ambient temperatures over 30 C 86 F see Correction Fa...

Page 6: ...DEVICES FOR HOT WATER SUPPLY SYSTEMS ANSI Z21 22 This valve must be marked with a maximum set pressure not to exceed the marked maximum working pressure of the water heater Install the valve into an...

Page 7: ...E UPPER THERMOSTAT BEHIND JUNCTION BOX DOOR ADJUSTABLE LOWER SINGLE THERMOSTAT Figure 3 shows the approximate time to burn relationship for normal adult skin The thermostats on your water heater have...

Page 8: ...TER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT It is recommended that the drain valve on this unit be opened once a month and 1 to 2 gallons of water be allowed to dr...

Page 9: ...ure Excessive water temperature Faulty relief valve Excessive water pressure is the most common cause of relief valve leakage It is often caused by a closed system A check valve in the inlet system wi...

Page 10: ...tricity and drain tank to perform procedure Water leaks at the elements may be due to 1 Defective element which leaks at terminals or thru flange Replace element 2 Loose element gasket leak a Screw in...

Page 11: ...r any misuse abuse including freezing or alteration of it any operation of it in a modified form or any attempt to repair tank leaks will void this warranty 4 SERVICE and REPAIR EXPENSE Under this lim...

Page 12: ...12 5621 W 115TH STREET ALSIP IL 60803 Phone 800 433 2545 Fax 800 433 2515 www hotwater com e mail parts hotwater com...

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