STIEBEL ELTRON DNM 3 Gebrauchs- Und Montageanweisung Seite 8

1. Operating instructions
1.1 Unit description
The DNM hydraulically controlled open
(pressureless) mini-instantaneous water
heater is designed for supplying an open
fitting with hot water. When the draw-off
fitting is opened, the heating capacity
switches on automatically and the water is
heated. The hot water output is dependent
on the cold water temperature, the heating
capacity, and the flow rate.
1.2 The most important
points in brief
• Temperature adjustment is effected
using the fitting:
– To increase the temperature,
restrict the flow rate a little.
– For low temperatures, increase the
flow rate or mix in cold water.
1.3 Hot water output
hot water output*
Type Output
2,0 l/min
DNM 3 3,5 kW
DNM 4 4,4 kW 2,5 l/min
* The built-in automatic flow regulation
provides for a constant flow rate. Hot
water output with 230 V mains voltage
and a temperature increase of 25 K.
2. Installation instructions
2.1 Unit structure A
1 Cold water connection with filter
2 Hot water connection
3 Cover securing screw
4 Unit rear panel
5 Unit front cover
6 Fixing holes for under-sink installation
7 Snap closing catch
8 Connection cable 700 mm long
2.2 Delivery variants B
1 DNM 3 or DNM 4
2 DNM 3 with MAW
3 DNM 3 with MAZ
4 DNM 3 with MAE
8
for the user and the qualified installer
1.4 Safety instruction
• In the case of temperature
selection, water temperatures of
over 60 °C can be reached at the hot
water outlet. Small children should there-
fore be kept away from the hot water
outlets.
Danger of scalding!
1.5 Important notes
• If the water feed of the DNM has
been interrupted - e.g. because of
the danger of frost or work on the wa-
ter pipe, the following steps must be
taken before the unit is brought back
into operation:
1. Remove or switch off fuses.
2. Open a tap downstream of the unit
until the unit and the cold water feed
pipe are free of air.
3. Replace or switch on fuses again.
• The mini-instantaneous water heater
must not be exposed to any pressure.
Never close off the fitting outlet and do
not use an aerator or a hose with a jet
regulator. Furring can close off the
outlet and thus cause the mini-
instantaneous water heater to be under
pressure.
for the qualified installer
2.3 Important information
Air in the cold water pipe will
destroy the bare-wire heating system
of the DNM. If the water supply to the
DNM has been interrupted, for example
due to the risk of frost or work on the
water pipe, the following steps must be
carried out before the system is used
again:
1. Disconnect supply or disconnect the
fuses.
2. Open a hot water tap downstream of
the device for as long as is necessary
for the device and the cold water pipe
to be freed of air.
3. Reconnect the supply or connect the
fuses again.
– All information in these Instructions for
Use and Installation must be followed
carefully. They provide important
information with regard to safety,
operation, installation, and maintenance
of the device.
1.6 First actions to be taken
in the event of malfunction
• Check the fuses
• Check the fitting for lime scale blockage or
dirt accumulation. See also "3. Fault
finding by the user".
1.7 Maintenance and care
Maintenance work, such as for
example checking the electrical
safety, may only be carried out by a
qualified installer.
Regularly delime the jet regulator in the
fitting and if necessary replace:
Order no.: 25 45 13
A damp cloth is sufficient for care of the unit.
Do not use any abrasive or corrosive clean-
ing agents.
1.8 Operating and installa-
tion instructions
Keep these instructions carefully and
pass them on to your successor in
the event of a change in ownership, in the
event of maintenance and possible repair
work they should be passed to the quali-
fied installer for his attention.
2.4 Brief description
The DNM hydraulically controlled mini-
instantaneous water heater is a pressureless
unit for the heating of cold water in
accordance with WRC Regulations, with
which a water tap can be supplied. The unit
is suitable for hand washing basins, for
example in guest WC's, and for under-sink
and over-sink installation.
The bare-wire heating system is suitable for
low-lime and limy water (see Table 2 for
ranges of use).
2.5 Fittings
Note: only pressureless fittings may
be installed. The DNM must not be
exposed to any pressure. Never close off
the fitting outlet. Furring can close off the
outlet and impair the function. For
optimum jet patterns use only the jet
regulator supplied.