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16 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide
OPERATION
OPERATION
General Opera on
(Control Assembly)
IMPORTANT: On the ini al start up of the
unit, the water heater will go through a
seven (7) to ten (10) minute diagnos c
period prior to hea ng the water.
NOTICE: If the water is warm/hot, the
unit will not go through the diagnos c
period.
The primary func on of the control
assembly is to heat the water in the tank
un l it reaches the control set point.
The control assembly has two means of
hea ng the water, the upper element and
the lower element, and only energizes
one element at a me. A er reaching the
control set point, the temperature in the
tank is allowed to drop a pre-determined
amount before the elements are turned
on again. NOTICE: The water heater can
be controlled remotely through the use
of the app over a Wi-Fi connec on (see
page 18).
The control logic of the control assembly
is designed so that the upper hea ng
element will always have priority over
the lower hea ng element when both
elements call for heat. The temperature
regula on will not performed un l a er
the Dry-Fire detec on algorithm indicates
that there is suffi cient water in the tank.
Vaca on Mode (Control
Assembly)
To save energy, select Vaca on mode to
lower the temperature se ng on the
thermostat if you plan to be away for an
extended me.
NOTICE: Vaca on mode has a fi xed set
point of 50°F/10°C.
When Vaca on mode is selected, the
vaca on mer will be displayed. The
default vaca on days are preset at 7
days. Press the Up and Down bu on to
modify the mer to desired number of
vaca on days (se ng range: 1 to 99 days
or permanently ON). The vaca on mer
will blink on the display; press the Enter
bu on to confi rm the vaca on mer. To
deac vate Vaca on mode, press the
Vaca on mode bu on to return to the
previous opera ng mode or press the
bu on for any other desired mode.
When the vaca on days decrease to 9
hours remaining, the Control Assembly
will automa cally switch to the
previously selected mode.
NOTICE: Normally, the display will only
show the remaining vaca on days.
C AUTION! Hydrogen gas builds up in
a hot water system when it is not used
for a long period (two weeks or more).
Hydrogen gas is extremely fl ammable.
If the hot water system has not been
used for two weeks or more, open a hot
water faucet for several minutes at the
kitchen sink before using any electrical
appliances connected to the hot water
system. Do not smoke or have an open
fl ame or other igni on source near the
faucet while it is open.
Need Assistance?
Call our Technical Assistance Hotline at 1-800-527-1953 .
We can help you with installa on, opera on, troubleshoo ng,
or maintenance. Before you call, write down the model and serial
number from the water heater’s data plate.
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