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1. Operating Instructions
1.1 Description of Unit
The open (pressure-less) water heater cons-
tantly maintains the water content at the pre-
set temperature.
On heating, the expansion water drips through
the outlet fitting.
Only fittings for open (pressureless) water he-
aters may be installed. We recommend Stiebel
Eltron fittings: for order no. see 1.7 „Special
accessories".
The "thermostop" function (thermal separati-
on) prevents heating of the tempering fitting
in standby mode.
1.2 The most important points
in brief
• Set the desired hot water temperature
at the temperature selector (1)
• The unit is heating when the display (2)
lights.
1.3 Operation
Temperature setting
°C = cold. On this setting, the unit, but not
the fitting or water pipe, is protected
from frost
Eco = recommended energy-saving setting
(approx. 60 °C), low limescale formati-
on
85 = max. temperature setting.
Note:
On request, the engineer can restrict the tem-
perature on the unit (see 2.8 "First Use") so
that the temperature can be set anywhere up
to the temperature limit.
Heating time:
If the entire water content is used, the heating
time is that shown on the diagram.
[min]
25
20
15
10
5
0
35 °C
55 °C E 65 °C
Example:
Temperature setting:
65 °C
Heating time:
approx. 18 minutes
8
for the user and engineer
Mixed water quantity:
Using the temperature, you set a mixed water
quantity for e.g. 40 °C.
[ l ]
30
25
20
15
10
5
0
40 °C
55 °C E 65 °C
Example:
Temperature setting:
Cold water feed:
Mixed water quantity:
1.4 Important Note
• The water heater must not be pres-
surized. Never block the fitting outlet
and do not use a Perlator or hose with jet
controller.
2
• If the temperature is set higher than 45 °C,
very hot water can flow immediately!
• Keep children and the disabled (physical/
mental) away from this unit unless they are
1
supervised by a person responsible for their
safety or have been given instructions on
how to use it.
• Ensure that children do not adjust the tem-
perature (to a high temperature) on the unit
Risk of scalding!
when playing -
• We recommend the use of the temperature
restrictor set by the engineer, unless absolu-
tely necessary otherwise.
• To avoid risk of accidental resetting of the
protective temperature restrictor in the event
of a fault, the unit must not be connected via
a timer switch.
Limescale can block the outlet and hence pres-
surize the heater.
Signs of limescale are boiling sounds and
reduced water flow. In this case have the unit
and fitting descaled by an engineer
The thermostat knob may only be removed by
an engineer.
All information in these Operating and In-
stallation Instructions must be observed. The
instructions contain important information for
safety, operation and maintenance of the unit.
2 kW
85 °C
1.5 Care and Maintenance
To clean the unit, simply wipe with a damp
cloth. Do not use abrasive or aggressive clea-
ning agents.
SNU 10 S L
SNU 10 SLi
1.6 What to do if . . . ?
...there is no hot water:
Check the thermostat, plug and fuse.
...there is a boiling sound from the unit:
85 °C
Have the unit and fitting descaled by an en-
gineer.
...see also 3. „Fault repair by the user and
65 °C
engineer".
15 °C
approx. 20 l
If an engineer is called for a problem, to help
him resolve this more quickly and efficiently,
please give him the information below on the
unit rating plate (9):
Nr.: ...... - .... - ......
Typ: SNU 5 SL
1.7 Special accessories
Stiebel Eltron order numbers:
• Two-handle tempering fittings
- for bathroom:
WST-W 07 44 27
WST
WSM
- for kitchen:
WST-K
WUT
WUM
• Single lever mixer fittings
- for bathroom:
MEW
- for kitchen:
MES
MESB
MESL
Maintenance work should only be
performed by an engineer.
..............
22 24 30
22 24 31
07 44 28
22 24 32
22 24 33
22 24 39
22 24 40
22 24 41
22 24 42
C26_02_06_0010
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