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Troubleshooting Guide
Start Up Conditions
THERMAL EXPANSION
Water supply systems may, because of high line pressure, fre-
quent cut-offs, the effects of water hammer and others, have
installed devices such as pressure reducing valves, check valves,
back flow preventers, etc...to control these tTpes of problems.
When these devices are not equipped with an internal by-pass,
and no other measures are taken, the devices cause the water sys-
tem to be dosed. As water is heated, it expands (thermal expan-
sion) and closed systems do not allow for the expansion of heated
water.
The water within the water heater tank expands as it is heated
and increases the pressure of the water system. If the relieving
oint of the water heater's tem erature- ressure relief valve is
P P P
reached, the valve will relieve the excess pressure. The tempera-
ture-pressure relief valve is not intended for the constant
relief of thermal expansion. This is an unacceptable condition
and must be corrected.
It is recommended that any devices installed which could create a
closed system, have a by-pass and/or the system have an expan-
sion tank to relieve the pressure built by thermal expansion in
the water system. Expansion tanks are available for ordering
through the Sears Service Center. Contact the local water suppli-
er and/or Seas Service Center for assistance in controlling these
situations.
STRANGE SOUNDS
Possible noises due to expansion and contraction of some metal
arts during periods of heat-up and cool-down do not represent
armful or dangerous conditions.
1. Before beginning, turn "OFF" dectrical power supply to the
water heater.
2. Remove the two screws securing the access pand and remove
pand.
3. Open the flap of insulation to expose the opening.
4. Reset tile high limit by pushing in the red button marked
"RESET".
Operational Conditions
RUMBLING NOISE
In some water areas, scale or mineral deposits will build up on
your heating elements. This buildup will cause a rumbling noise.
Follow "Element Cleaning/Replacement" instructions to clean
and replace the elements.
HIGH TEMPERATURE SHUT OFF SYSTEM
The water heater has a high limit shut off system with a reset
button located in the upper thermostat.
Follow the resetting instructions which refer to the high limit
behind the upper access panel.
NOTE: If your water heater is connected to an "OFF PEAK"
clock, and uses the "3 wire lead" wiring diagram in the
"Wiring Diagram" section, then the water heater will have a
hi-limit on both the upper and lower thermostats. Follow the
instructions to reset the hi-limlt behind the upper and lower
access panels.
--RESETBUTTON
5. Fold the insulation back in place so that it completely covers
the thermostat and element.
6. Replace the access panel.
7. Turn "ON" electric power to the water heater.
A CAUTION
t lf the high limit must be reset again, call Sears Service
Department to find out why the high limit turned "OFF"
the electric power,
18
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