OPERATION
Settings and displays
10
| DHC-E Trend & DHC-E Plus
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If the display-lock is active, a lock symbol will appear on the base
display, and no parameters can be changed. In order to disable the
lock, hold the T
max
button for 12 seconds. The lock will disappear
from the display and all parameters can be changed again.
Pressing the T
max
button once while at the display-lock parameter
setting menu will move the display back onto T
max
parameter setting
menu.
5.4.3 Returning to the base display
While navigating the display and on any menu other than the base
display, holding the T
max
button for 5 seconds will return the display
to the base display. Additionally, the display will revert to the base
display after a 15-second period with no user input.
5.5
DHC-E Plus display
The DHC-E Plus features a primary and secondary display area al-
lowing for multiple parameters or information to be displayed. The
DHC-E Plus is capable of displaying the current flow rate of the water
passing through the water heater, as well as calculating the accu-
mulated cost savings of having a tankless water heater compared
to a tank-type water heater.
For the name of each display element on the DHC-E Plus, consult
section 5.2.1, “DHC-E Plus display overview”, pg. 8.
5.5.1
Base display
The DHC-E Plus base display displays the current setpoint tempera-
ture 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 demand
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 30% of full capacity.
The bottom half of the display shows the current flow rate through
the unit in either gallons per minute (gpm) or liters per minute (l/
min).
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 clockwise,
and decreased by turning it counter-clockwise. The water heater
can be deactivated while still powered by turning the control knob
counter-clockwise, past the 68 °F (20 °C) setting.
5.5.2
Information menu
The information menu structure displays additional information for
the user. The information menu is accessed by pressing the Infor-
mation 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 the current set-
point temperature 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 local 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. 11.
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.