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OPERATION
Settings and displays
10 | DHX Trend & DHX Plus www.stiebel-eltron-usa.com
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 information on how
to do this, see section “Electricity cost parameter setting”, pg. 10.
Pressing the Information button will advance back to the base dis-
play. The display will also revert back to the base display if no user
input is detected for 10 seconds.
5.5.3 Parameters menu
The parameter menu allows multiple settings on the DHX Plus to
be altered. The parameter 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 set-
point 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, indicating
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 counter-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
function
is active and limiting the maximum allowable temperature.
Pressing the Information button once while at this menu will move
the display onto the temperature units parameter setting.
Temperature units parameter setting
The DHX Plus is capable of displaying temperature in either degrees
Fahrenheit or degrees Celsius.
The current unit will be shown and the secondary display value will
be flashing to indicate that the value can be changed. Rotate the
control knob to change the value between degrees Fahrenheit and
degrees Celsius.
Pressing the Information button once while at this menu will move
the display onto the volume units parameter setting.
Volume units parameter setting
The DHX Plus is capable of displaying volume or volume flow in
either gallons per minute (gpm) or liters per minute (l/min).
The current volume unit will be displayed and the value will be
flashing to indicate that it can be changed. Rotate the control knob to
change the value between gallons per minute and liters per minute.
Pressing the Information button once while at this menu will advance
the display to the electricity cost parameter setting.
Electricity cost parameter setting
The DHX Plus has a built-in feature where it calculates the energy
savings of the unit when compared to the average energy use of a
tank-type water heater. In order for this feature to be accurate, the
cost per kWh of electricity must be programmed into the software.
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