OPERATION
Settings and displays
8 | DCE Premium www.stiebeleltronamericas.com
The DCE Premium features a primary and secondary display area
allowing for multiple parameters or information to be displayed.
The DCE Premium is capable of displaying the current flow rate of
the water passing through the water heater, as well as calculating
the accumulated cost savings of having a tankless water heater
compared to a tank-type water heater.
For the name of each display element on the DCE Premium, consult
section 4.2, “Display overview”, pg. 7.
4.3.1 Base display
The DCE Premium base display displays the current setpoint tem-
perature in your preferred temperature unit in the top half of the
display.
The bar below the temperature shows the current fraction of total
capacity that the water heater is running at. As the hot water de-
mand fluctuates, the power capacity status will change to show
between 0 and 10 segments. The display below shows that the
water heater is operating at 40% of capacity.
The bottom half of the display shows the current flow rate through
the unit in either liters per minute (l/min) or gallons per minute
(gpm).
All other menus will revert back to the base display either after a
15 second period of time without user input, or after a 5 second
hold of the Information button.
Changing the setpoint temperature
Temperature settings
Range Increment Range Increment
68–140 °F 1 °F 20–60 °C 0.5 °C
The setpoint temperature can be set between 68 °F (20 °C) and
140 °F (60 °C).
The setpoint can be increased by turning the control knob clock-
wise, and decreased by turning it counter-clockwise. The water
heater can be deactivated while still powered by turning the con-
trol knob counter-clockwise, past the 68 °F (20 °C) setting.
4.3.2 Information menu
The information menu structure displays additional information
for the user. The information menu is accessed by pressing the
Information button while at the base display.
Accumulated cost savings display
If the Information button is pressed while the display is showing
the base display, the display will advance to the accumulated cost
savings display.
The accumulated cost savings display will display “I1” in the top
half of the display, and the bottom half of the display will alternate
between “Cur” and the accumulated savings of the water heater.
The accumulated cost savings updates daily, and shows the esti-
mated savings for the user compared to an installation where a
50-gallon tank-type water heater was used.
Note
The energy saving values are calculated starting from
the last reset.
This savings estimate is based on the users electricity cost. For
the most accurate estimate, the electricity cost per kWh should
be set in the electricity cost parameter setting menu. For infor-
mation on how to do this, see section “Electricity cost parameter
setting”, pg. 9.
Pressing the Information button will advance back to the base
display. The display will also revert back to the base display if no
user input is detected for 15 seconds.
4.3.3 Parameters menu
The parameters menu allows multiple settings on the DCE Pre-
mium to be altered. The parameters menu can be accessed by
holding the Information button for 5 seconds.
T
max
parameter setting
The first parameter menu sets the value for T
max
. The value of
T
max
acts as a high temperature limiter. If the T
max
value is set, the
setpoint of the water heater cannot be set above the T
max
value.
This feature is useful in scenarios where scalding from hot water
is a real possibility.
At the T
max
setting menu, the temperature value will flash, in-
dicating that the value can be changed by rotating the control
knob. The T
max
value can be increased by turning the control knob
clockwise, and decreased by turning it counter-clockwise. The
T
max
value can be deactivated by turning the control knob count-
er-clockwise, past the 68 °F (20 °C) setting. The display will read
“Off” if T
max
is inactive.
If the T
max
symbol is visible at the base display, then the T
max
func-
tion is active and limiting the maximum allowable temperature.
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