Water Heater Description; Settings And Displays; Dhx Select User Interface - Stiebel Eltron DHX 15 Select Guía Rápida De Inicio

OPERATION

Water heater description

4. Water heater description
The water heater switches on automatically as soon as a hot water
valve at a tap or other draw-off point is opened. DHX heats water as
it flows through the unit. When the tap is closed, the water heater
switches off automatically.
From the activation flow rate, the electronic control unit controls the
correct heating output using only the minimum amount of power
necessary, subject to the temperature selected, the current incoming
cold water temperature, and the flow rate.
DHX Select models are electronically controlled tankless water heat-
ers, and maintain a consistent outlet temperature. This is irrespec-
tive of the inlet water temperature, up to the maximum output of
the water heater.
DHX Select models feature Advance Flow Control
patented by Stiebel Eltron in Germany (patent no. DE 3805441 C2).
When the maximum output of a DHX Select model is met, rather
than deviate from the setpoint temperature and deliver cooler water,
DHX Select models use an electronically-controlled motorized valve
to slightly reduce the flow of water only as much as is necessary
to maintain the user-selected temperature. When the demand can
again be fully met, the motorized valve returns to the fully open posi-
tion, allowing the full flow rate. This ensures uninterrupted comfort,
and hot water delivered at the desired temperature at all times.
If the water heater is operated with preheated water, and the inlet
temperature exceeds the selected set temperature, the inlet tem-
perature will be displayed on the second row of the screen and will
flash. The water is not heated further.
DHX Select models are equipped with functions to permanently limit
the temperature (childproofing).
DHX Select models feature a backlit display that switches on auto-
matically as soon as water flows through the unit, or if a change is
made at the user interface. The backlight switches off automatically
if no changes are made for 30 seconds, or 5 seconds after hot water
stops being drawn.
DHX Select models allow the user to save different preset tempera-
tures and apply them quickly.
Domestic Hot Water (DHW) temperature
The DHW outlet temperature can be variably adjusted from 68–140 °F
(20–60 °C). The selected temperature is displayed.
Heating system
™
The Direct Coil heating system is comprised of a pressure-tested,
glass-reinforced polyamide heating chamber with a nichrome wire
direct heating coil. It is suitable for hard and soft water areas and
is largely insusceptible to scale build-up. The Direct Coil
system ensures rapid and efficient DHW production.
www.stiebel-eltron-usa.com
Note
The water heater is equipped with an air detector that
largely prevents damage to the heating system. If, during
operation, air is drawn into the water heater, the water
heater shuts down the heating output for one minute to
protect the heating system.
5.

Settings and displays

5.1

DHX Select user interface

™
, a technology
1 Backlit display
2 Temperature memory keys
3 Operating LED (flashes when output limit is reached)
4 Control knob
5 Main display | info display | parameter display
6 Segment display [10–100%]
7 "T " button
max
5.1.1 DHX Select display overview
1
2
™
heating
1 Digit display
2 Power capacity status
3 T indicator
max
4 Temperature unit indicator
5 Display-lock indicator
1
2
3
4
3
5
6
7
5
4
DHX 15 Select | 7