Operating Instructions; Description Of Unit; The Most Important Points In Brief; Operation - STIEBEL ELTRON SNU 5 SL Operating And Installation Instructions

1. Operating Instructions
1.1 Description of Unit
• The open (pressure-less) water heater con-
stantly maintains the water content at the
preset temperature.
• The "thermostop" function (thermal sepa-
ration) prevents heating of the tempering
fitting in standby mode.
• The "antitropf" (anti-drip) function pre-
vents expansion water from penetrating the
fitting during heating up.
» When water heats up, gas bubbles form.
There may be more or less of them de-
pending on the quality of the water. At
temperatures > 75 °C, residual water
may drip out of the fitting outlet.
» Depending on the design type, different
fittings are inclined to incur subsequent
dripping after closure. This is residual
water from the fitting outlet and not ex-
pansion water.
• Only fittings for open (pressureless) water
heaters may be installed.
We recommend Stiebel Eltron fittings: for
order no. see 1.7 „Special accessories".
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.
8
for the user and engineer
Heating time:
If the entire water content is used, the heating
time is that shown on the diagram.
[min]
15
10
5
0
35 °C
Example:
Temperature setting:
Heating time:
Mixed water quantity:
Using the temperature, you set a mixed water
quantity for e.g. 40 °C.
[ l ]
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.
• If the temperature is set higher than 45 °C,
2
very hot water can flow immediately!
• Keep children and the disabled (physical/
mental) away from this unit unless they are
supervised by a person responsible for their
1
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
when playing - Risk of scalding!
• 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
55 °C E 65 °C 85 °C
65 °C
approx. 9.5 minutes
85 °C
65 °C
15 °C
approx. 10 l
1.5 Care and Maintenance
To clean the unit, simply wipe with a damp
cloth. Do not use abrasive or aggressive clea-
ning agents.
Maintenance work should only be
performed by an engineer.
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:
Have the unit and fitting descaled by an en-
gineer.
...see also 3. „Fault repair by the user and
engineer".
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 22 24 30
WSM
22 24 31
- for kitchen:
WST-K 07 44 28
WUT
22 24 32
WUM 22 24 33
• Single lever mixer fittings
- for bathroom:
MEW 22 24 39
- for kitchen:
MES 22 24 40
MESB 22 24 41
MESL
22 24 42
• Filter for cold-water connection
Order no. 27 00 45
• Electrical connection cable
Order no. 02 06 71
C26_02_06_0010