STIEBEL ELTRON SNO 5 Plus GB Specification sheet

Small water heater (non-pressur-
ised) 2
SNO 5 Plus GB/ SNO 10 Plus GB
Dieses Produkt ist nur für gut isolierte Räume oder
für den gelegentlichen Gebrauch geeignet.
This product is only suitable for well insulated
spaces or occasional use.
Ce produit convient uniquement aux locaux bien
isolés ou à un usage occasionnel.
Dit product is alleen geschikt voor goed
geïsoleerde ruimtes of voor occasioneel gebruik.
Tento výrobek je vhodný pouze pro dobře izo-
lované prostory nebo příležitostné použití.
Tento produkt je určený len do dobre izolovaných
priestorov alebo len na príležitostné použitie.
Produkt nadaje się wyłącznie do dobrze zaizolow-
anych pomieszczeń lub do okazjonalnego korzys-
tania.
A termék kizárólag megfelelően szigetelt hely-
iségekben vagy alkalomszerűen használható.
Operation and installation

Table of contents
2 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
1 Special information................................................... 3
2 General information.................................................. 3
2.1 Test mark ......................................................... 3
2.2 Units of measurement ...................................... 3
2.3 Symbols in this document ................................ 3
3 Safety........................................................................ 3
3.1 Intended use .................................................... 3
3.2 Structure of the warning notices....................... 3
3.3 Safety instructions............................................ 4
4 Appliance description................................................ 4
4.1 Function........................................................... 4
4.2 Standard delivery ............................................. 4
4.3 Required accessories........................................ 4
5 Installation (qualified contractors)............................. 4
5.1 Installation site................................................. 4
5.2 Appliance installation....................................... 5
5.3 Water connection ............................................. 5
6 Commissioning (qualified contractors) ...................... 5
6.1 Filling the appliance with water ....................... 5
6.2 Electrical connection ........................................ 5
6.3 Setting a permanent temperature limit............. 6
7 Operation.................................................................. 6
8 Cleaning and care ..................................................... 6
9 Maintenance (qualified contractors) .......................... 6
9.1 Draining the appliance ..................................... 6
9.2 Opening the appliance ..................................... 7
9.3 Descaling the appliance ................................... 7
9.4 Checking the earth conductor (DGUV V3) .......... 7
9.5 Replacing the connecting cable ........................ 7
9.6 Positioning the temperature sensor in its pro-
tective pipe....................................................... 7
10 Troubleshooting (users) ............................................ 7
11 Troubleshooting (installers)....................................... 8
12 Shutting down the system ......................................... 8
13 Specification ............................................................. 8
13.1 Dimensions and connections 5litre appliance .. 8
13.2 Dimensions and connections 10litre appliance. 8
13.3 Wiring diagram................................................ 8
13.4 Energy consumption data................................. 9
13.5 Heat-up diagram.............................................. 9
13.6 Data table ........................................................ 9
14 Customer service and guarantee ............................... 9
15 Environment and recycling........................................ 9

Special information
www.stiebel-eltron.com SNO 5 - 10 Plus GB | 3
1 Special information
– The appliance may be used by children over
3 years of age and persons with reduced
physical, sensory or mental capabilities or a
lack of experience and expertise, provided
that they are supervised or they have been
instructed on how to use the appliance
safely and have understood the potential
risks. Children aged 3 to 8 years may only
operate the tap connected to the appliance.
Children must never play with the appli-
ance. Cleaning and user maintenance must
not be carried out by children without su-
pervision.
– When permanently connected to the power
supply using a dedicated junction box, the
appliance must be able to be isolated from
the mains power supply by an isolator that
disconnects all poles with at least 3mm
contact separation.
– The power cable may only be replaced by
qualified contractors authorised by the
manufacturer. Use the original spare part.
Otherwise, you risk damaging the appli-
ance.
– Never connect the appliance via an external
switching facility such as a time switch.
– Secure the appliance as described in
chapter "Installation/ Appliance installa-
tion".
– The appliance must only be installed with
an open (non-pressurised) tap.
– Never subject the appliance to water pres-
sure.
– The tap outlet has a vent function. Scale
build-up can block the outlet and subject
the appliance to pressure.
– Never block the tap outlet.
– Only use special aerators for non-pressur-
ised water heaters.
– Never extend the tap outlet with a hose.
2 General information
Read these instructions carefully before using the
appliance and retain them for future reference.
Pass on these instructions along with the appliance
as necessary.
2.1 Test mark
See type plate on the appliance.
2.2 Units of measurement
All measurements are given in mm unless stated otherwise.
2.3 Symbols in this document
Symbol Meaning
General information is identified by the adjacent symbol.

This symbol indicates that you have to do something.
3 Safety
3.1 Intended use
This open vented (non-pressurised) appliance is designed for
heating domestic hot water. The appliance can supply one
draw-off point. The appliance must only be installed with an
open (non-pressurised) tap.
The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-
domestic environments, e.g.in small businesses, as long as it is
used in the same way.
Observation of these instructions and of instructions for any ac-
cessories used is also part of the intended use of this appliance.
NOTICE
Property damage
The appliance is designed for oversink installation.
uDuring installation, the water connections of the
appliance must point downwards.
3.2 Structure of the warning notices
3.2.1 Section-specific warning notices
Section-specific warning notices apply to all steps in the section.
Injury
CAUTION
Type and source of risk
Consequence(s) of failure to observe the warning no-
tice
uHazard prevention measure(s)
Property damage, consequential losses, environmental
pollution
NOTICE
Type and source of risk
Consequence(s) of failure to observe the warning no-
tice
Hazard prevention measure(s)
3.2.2 Embedded warning notices
Embedded warning notices apply only to the subsequent step.
u
SIGNAL WORD: Consequence(s) of failure to observe the
warning notice. Hazard prevention measure(s).
Step to
which the warning notice refers
en

Appliance description
4 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
3.2.3 Key to symbols
Symbol Type of risk
Injury
Electrocution
Burns, scalding
3.2.4 Signal words
Signal
word
Meaning
DANGER Failure to observe this information will result in death or
serious injury
WARNING Failure to observe this information may result in death or
serious injury
CAUTION Failure to observe this information may result in moderate
or minor injury
NOTICE Failure to observe this information may result in property
damage, consequential losses or environmental damage
3.3 Safety instructions
– There is a risk of scalding at outlet temperatures in excess
of 43°C.
– The temperature selector should only be removed by a
qualified contractor.
– Where children or persons with limited physical, sensory or
mental abilities are allowed to use this appliance, we re-
commend a permanent temperature limit. A qualified con-
tractor can set this limit.
Possible property damage
– Frost can destroy the appliance and the connected tap. Pro-
tect the appliance and the tap against frost.
– Never subject the appliance to water pressure. The tap out-
let has a vent function. Scale build-up can block the outlet
and subject the appliance to pressure.
– Never block the tap outlet.
– Only use special aerators for non-pressurised water
heaters.
– Never extend the tap outlet with a tap hose.
– Connecting the appliance via an external switching facility
such as a time switch will cause an unintentional reset of
the high limit safety cut-out. The appliance must not be
connected to a power circuit that is regularly switched on
and off by a device.
General information
Only a qualified contractor should carry out installation, com-
missioning, maintenance and repair of the appliance.
We guarantee trouble-free function and operational reliability
only if original accessories and spare parts intended for the ap-
pliance are used.
4 Appliance description
4.1 Function
The open vented (non-pressurised) appliance is suitable only for
oversink installation. The appliance is intended to heat cold wa-
ter for supplying a single draw-off point. It must only be used
with a non-pressurised tap.
4.2 Standard delivery
The following are delivered with the appliance:
– Wall mounting bracket
– Drilling template (10 litre appliance only)
4.3 Required accessories
A non-pressurised tap must be used for open vented operation
of the appliance. Stiebel Eltron offers a wide range of suitable
taps.
5 Installation (qualified contractors)
5.1 Installation site
NOTICE
Property damage
The water in the appliance may freeze and damage
the cylinder and connections by expansion.
uOnly install the appliance in a room free from the
risk of frost.
NOTICE
Property damage
uMount the appliance on the wall. The wall must
have sufficient load bearing capacity.
NOTICE
Property damage
The appliance is designed for oversink installation.
uDuring installation, the water connections of the
appliance must point downwards.
Ensure that the appliance is freely accessible for
maintenance work.
NOTICE
Property damage
Connecting pipe length (from tap to appliance) must
not exceed 1m.
For connection pipes >1m:
uInstall a tube aerator attachment in the overflow
line.
Always install the appliance vertically and near the draw-off
point.

Commissioning (qualified contractors)
www.stiebel-eltron.com SNO 5 - 10 Plus GB | 5
200-300
D0000107420
5.2 Appliance installation
uMark out the holes for drilling using the installation tem-
plate.
uDrill the holes and insert suitable rawl plugs.
uSecure the wall mounting bracket using suitable screws.
uHang the appliance on the wall mounting bracket.
uSurplus connecting cable can be stored in the cable storage
compartment.
D0000107421
5.3 Water connection
NOTICE
Property damage
The appliance may develop a leak and cease function-
ing.
uNever subject the appliance to water pressure.
uNever interchange the water connections.
uSet the flow rate (see tap instructions). Observe
the maximum permissible flow rate with a fully
opened tap (see chapter "Specification/ Data
table").
uMatch up the colour coding on the tap water connections
and the appliance:
– R.h. side blue = "Cold water inlet"
– L.h. side red = "DHW outlet"
uSecure the water connections from the tap to the appliance.
D0000107422
NOTICE: When tightening the fittings, counterhold with a suit-
able spanner.
6 Commissioning (qualified contract-
ors)
NOTICE:Do not connect the power supply until the appliance is
completely filled with water!
WARNING
Electrocution
Commissioning may only be carried out by a qualified
contractor in accordance with safety regulations.
6.1 Filling the appliance with water
1. 2.
D0000049325
uOpen the cold water inlet of the distribution board.
uEither open the DHW valve of the tap or set the mono lever
mixer tap to "hot" until the water that flows out is free of air
bubbles. This process may take several minutes.
uCheck the entire hydraulic installation for tightness.
6.2 Electrical connection
WARNING
Electrocution when the appliance is permanently con-
nected to the mains
When permanently connected to the power supply us-
ing a dedicated junction box, the appliance must be
able to be isolated from the mains power supply by
an isolator that disconnects all poles with at least
3mm contact separation.
en