5
Figure 23 - Energy Cut Off (ECO) button
The Energy Cut O (ECO) shuts o
power to the water heater’s elements
if the temperature of the water in
the tank gets too hot. If the ECO has
tripped, you’ll have no hot water.
A tripped ECO can usually be reset,
but you should have a qualied
person invesgate the cause of the
overheang and repair the problem.
Do not turn the power back on unl
the cause of the overheang has been
idened and repaired.
• Turn o the power to the water
heater.
• Press the red ECO reset buon (see
photo above).
• The ECO was tripped if you hear
a click when it is reset. In most
cases, a tripped ECO indicates
that the tank overheated due to a
problem with one of the elements
or thermostats—have a qualied
person check the upper and lower
elements and thermostats and
replace if necessary.
• The ECO was not tripped if you didn’t
hear a click. In that case, the upper
thermostat should be checked by a
qualied person.
• Replace the insulaon and close the
electrical juncon box.
If the hot water is simply not warm
enough, there are several possible
causes:
• Faulty Thermostac Mixing Valve in
a faucet or shower control (check
other faucets for hot water)
• One (or both) of the thermostats set
too low
• Water heater’s capacity too small (or
usage too high)
• Reversed plumbing connecons or
melted dip tube (usually found soon
aer new installaon)
• Plumbing leak
• Bad lower heang element (or lower
thermostat)
• Low supply voltage
If the
hot water is simply not warm enough,
make sure the faucet you are checking
doesn’t have a defecve Thermostac
Mixing Valve. Many shower controls
now have built-in mixing valves. If
these devices fail, they can reduce the
amount of hot water the shower or
faucet delivers even though there is
plenty of hot water in the tank. Always
check the water temperature at several
faucets to make sure the problem is
not in a faucet or shower control.
If the water
temperature at several faucets is
too cool, adjust the thermostat(s)
according to the instrucons in Step
10 of the Installaon secon of this
manual.
If your
water heater runs out of hot water
too quickly, it may be too small for
your needs. If the water heater is old,
consider replacing it with a larger
model. If the water heater is in good
condion, you may be able to meet
the plumbing system’s hot water needs
with the exisng water heater by
installing Thermostac Mixing Valves
and then turning the thermostat(s) to a
higher seng. See page 19, step 10.
Check the hot and cold
connecons and make sure the hot
water pipe is connected to the hot
water outlet on the water heater.
Usually, reversed connecons are
found soon aer the installaon of
a new unit. If copper pipes were
soldered while they were aached to
the water heater, the dip tube may
have melted. The dip tube is a long
plasc tube inside the tank aached
to the cold water inlet. If the dip
tube has melted, it can be replaced
by removing the cold water inlet
connecon, removing the old dip tube
and installing a new one.
Even a small leak in the
hot water side of the plumbing system
can make it appear that the water
heater is producing lile to no hot
water. Locate and repair the leak.
22 • Commercial Electric Water Heater Use and Care Guide
TROUBLESHOOTING
TROUBLESHOOTING
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