STIEBEL ELTRON SNO 5 Plus GB Instruction Manual

Small water heater (non-
pressurised) 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 Do not use any longer | Symbols in this docu-
ment ................................................................ 3
3 Safety........................................................................ 3
3.1 Structure of the warning notices....................... 3
3.2 Intended use .................................................... 4
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 ........................................ 6
6.3 Setting a permanent temperature limit............. 6
7 Operation.................................................................. 6
8 Cleaning ................................................................... 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........................................................ 7
11 Troubleshooting (qualified contractors)..................... 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 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
uRead these instructions carefully before using the
appliance and retain them for future reference.
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 Do not use any longer | Symbols in this
document
Symbol Meaning
This symbol indicates possible property damage,
equipment damage, consequential damage or envir-
onmental damage.
General information is indicated by the adjacent
symbol.

This symbol indicates that you have to do something.
3 Safety
3.1 Structure of the warning notices
3.1.1 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
uHazard prevention measure(s)
3.1.2 Embedded warning notices
Embedded warning notices apply only to the step immediately
following the notice.
uSIGNAL WORD: Consequence(s) of failure to observe the
warning notice. Hazard prevention measure(s). Step to
which the warning notice refers
3.1.3 Key to symbols
Symbol Type of risk
Injury
Electrocution
Burns, scalding
3.1.4 Signal words
Signal
word
Meaning
DANGER Failure to observe this information will result in
death or serious injury.
en

Appliance description
4 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
Signal
word
Meaning
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 environ-
mental damage.
3.2 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 product is designed for domestic use. It can be used safely
by untrained persons. This product can also be used in a non-
domestic environment, e.g.in a small business, 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.
3.3 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.
– Warning for Australia and New Zealand – This appliance
may deliver water at high temperature. Refer to the plumb-
ing code of Australia (PCA), local requirements and installa-
tion instructions to determine if additional delivery temper-
ature control is required.
– 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.
– Warning – For continued safety of this appliance it must be
installed, operated and maintained in accordance with the
manufacturer's instructions.
– 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.
– Only a qualified contractor should carry out installation,
commissioning, maintenance and repair of the appliance.
– Unsuitable spare parts and accessories may jeopardise the
safety of the product and persons using the appliance. Al-
ways use original spare parts and original accessories.
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
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 suit-
able 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 Link | 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"
uNOTICE:To prevent damage to the internal appliance con-
nections, counterhold with a suitable spanner when tight-
ening the water connections. Firmly secure the water con-
nections from the tap to the appliance.
uTake care not to kink the water connections when installing
them. Make sure there is no tension on the secured connec-
tions installation.
D0000107422
6 Commissioning (qualified contract-
ors)
uNOTICE:Do not connect the power supply until the appli-
ance is completely filled with water!
WARNING
Electrocution
Incorrect installation and commissioning can cause
serious injury.
uCommissioning 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.
en

Operation
6 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
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.
WARNING
Electrocution
Ensure that the appliance is connected to the earth
conductor.
NOTICE
Overvoltage
The voltage specified on the type plate must match
the mains power supply.
uEstablish the electrical connection by plugging in the stand-
ard plug or by a permanent connection.
The following electrical connections are permissible:
SNO 5 Plus
GB
SNO 10
Plus GB
Permanent connection to an appli-
ance socket with earth conductor x x
6.3 Setting a permanent temperature limit
D0000107423
Placing the limiting ring behind the temperature selector allows
you to limit the setting range of the temperature selector to a
specific maximum temperature.
uTurn the temperature selector to zero (fully anti-clockwise).
uPull off the temperature selector.
uUndo the two screws securing the limiting ring in the cas-
ing.
uRe-insert the limiting ring with the required temperature
limit.
uSecure the limiting ring in the casing with the screws.
uPush the temperature selector back on its shaft in the zero
position (fully anti-clockwise).
7 Operation
You can set any required hot water outlet temperature variably
at the temperature selector (1). During the heating process, the
heat-up and index indicator (2) lights up.
1
2
D0000107424 | CO
1 Temperature selector 2 Heat-up and index indic-
ator
Depending on the system, the actual temperatures may vary
from the set value.
On this setting, the appliance is protected from frost. The
tap and the water line are not protected
E Recommended energy saving setting ECO (approx. 60°C),
minor scaling
85 Highest temperature that can be set
NOTICE:The qualified contractor can set a permanent temperat-
ure limit on the appliance.
8 Cleaning
Almost every type of water will deposit limescale at high tem-
peratures. Limescale will settle inside the appliance and affect
its function and service life. The heating elements must there-
fore be descaled if necessary. A qualified contractor who is
aware of the local water quality will tell you when the next de-
scaling is due.
uA damp cloth is sufficient for cleaning the appliance. Never
use abrasive or corrosive cleaning agents.
uCheck the tap regularly. You can remove limescale deposits
at the outlet using commercially available descaling agents.
9 Maintenance (qualified contractors)
WARNING
Electrocution
Risk of serious injury from an open appliance
uBefore any work on the appliance, disconnect all
poles of the appliance from the power supply.
uDismantle the appliance for maintenance work.
9.1 Draining the appliance
WARNING
Burns
Hot water may escape when draining the appliance.
uAvoid all contact with escaping water.
uIsolate the appliance from the power supply.

Montageschablone | Installation Template Montageschablone | Installation Template
99_SNO_5_Plus_Schablone_ST4-Design.indd 1399_SNO_5_Plus_Schablone_ST4-Design.indd 13 31.05.2023 15:22:4431.05.2023 15:22:44

max. 5L
1 Min.
305 mm
140 mm
99_SNO_5_Plus_Schablone_ST4-Design.indd 1499_SNO_5_Plus_Schablone_ST4-Design.indd 14 31.05.2023 15:22:4431.05.2023 15:22:44

D0000108520
max. 5L
1 Min.
305 mm
140 mm
99_SNO_5_Plus_Schablone_ST4-Design.indd 1599_SNO_5_Plus_Schablone_ST4-Design.indd 15 31.05.2023 15:22:4431.05.2023 15:22:44

Montageschablone | Installation Template Montageschablone | Installation Template
99_SNO_5_Plus_Schablone_ST4-Design.indd 1699_SNO_5_Plus_Schablone_ST4-Design.indd 16 31.05.2023 15:22:4431.05.2023 15:22:44

Troubleshooting
www.stiebel-eltron.com SNO 5 - 10 Plus GB | 7
uUndo the fittings on the water connections.
uRemove the appliance from the wall mounting bracket.
uAllow the appliance to drain into a sink with the water con-
nections pointing downwards.
uLightly shake the appliance to aid draining.
9.2 Opening the appliance
D0000107425
uFully turn the temperature selector anti-clockwise.
uPull off the temperature selector.
uRemove the two screws behind the temperature selector.
uPull off the limiting ring.
D0000107121
uInsert a small screwdriver into the openings at the bottom
and carefully lift the appliance cover slightly.
D0000107122
uHinge the appliance cover upwards and remove it.
9.3 Descaling the appliance
NOTICE:Never treat the cylinder surface with descaling agents
as these can damage the plastic.
uOpen the appliance.
uRemove the flanged immersion heater.
uCarefully tap the heating element to remove coarse limes-
cale deposits.
uImmerse the heating element up to the flange plate in de-
scaling agent.
uCarry out descaling in accordance with the instructions
provided by the descaling agent manufacturer.
uAfter descaling, flush the heating element with clear water.
Reassemble the appliance.
9.4 Checking the earth conductor (DGUV V3)
uPull off the temperature selector.
uCheck the earth conductor (in Germany DGUVV3 for ex-
ample) across a limiting ring fixing screw and the earth
conductor contact of the connecting cable.
9.5 Replacing the connecting cable
NOTICE: The connecting cable must only be replaced with an
original spare part by a qualified contractor.
uRoute the connecting cable into the cable guide (5 litre ap-
pliance only).
6060
D0000107313
9.6 Positioning the temperature sensor in its
protective pipe
SNO 5 Plus GB
uWhen replacing the temperature controller, guide the tem-
perature sensor into its protective pipe.
uSecure the temperature sensor in place below the earthed
plug.
200
D0000107428
SNO 10 Plus GB
uWhen replacing the temperature controller and the high
limit safety cut-out, guide the temperature sensors into the
protective pipe.
L2
L1
D0000047948
L1 260mm Temperature sensor
L2 130mm High limit safety
cut-out
10 Troubleshooting
Problem Cause Remedy
The appliance does
not supply hot wa-
ter.
The temperature se-
lector is rotated
anti-clockwise as far
as it will go.
Switch the appliance
on by turning the
temperature se-
lector.
The appliance has
no power. Check the plug/fuses in the distribution
board.
Water can only be
drawn at a reduced
rate.
The aerator in the
tap is scaled up. Descale/replace the aerator.
Loud boiling noises
inside the appliance. The appliance is scaled up. Have the appliance descaled by a quali-
fied contractor.
uIf you cannot remedy the fault, contact your qualified con-
tractor.
uTo facilitate and speed up your enquiry, please provide the
qualified contractor with the number from the type plate.
en

Troubleshooting (qualified contractors)
8 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
11 Troubleshooting (qualified con-
tractors)
Problem Cause Remedy
The appliance does
not supply hot wa-
ter.
The high limit safety
cut-out has tripped. Remedy the cause of the fault. If neces-
sary, replace the
temperature con-
troller. Allow the
appliance to cool
down. If you have
isolated the appli-
ance from the power
supply, the high
limit safety cut-out
will be reset auto-
matically.
Loud boiling noises
inside the appliance. The appliance is scaled up. Descale the appli- ance.
12 Shutting down the system
uIsolate the appliance from the power supply by removing
the plug or by switching off the MCB in the distribution
board.
uDrain the appliance (see Draining the appliance [}6] ).
13 Specification
13.1 Dimensions and connections 5litre appliance
c06
c01
100
70
a30
a10
a20
14
i13
140
D0000107434
a10 Appliance Height mm 423
a20 Appliance Width mm 240
a30 Appliance Depth mm 212
c01 Cold water inlet Male thread G 1/2A
c06 DHW outlet Male thread G 1/2A
i13 Wall mounting
bracket Height mm 305
Horizontal hole spa-
cing mm 140
13.2 Dimensions and connections 10litre appliance
c06
c01
100
200
70
282
14
505
290
388
i13
D0000107470
13.3 Wiring diagram
1/N/PE | 220 – 240 V
SNO 5 Plus GB
LN
LED
D0000105875

Guarantee
www.stiebel-eltron.com SNO 5 - 10 Plus GB | 9
SNU 10 Plus GB
LN
LED
D0000107488
13.4 Energy consumption data
The product data complies with EU regulations relating to the
directive on the ecodesign of energy related products (ErP).
SNO 5 Plus
GB
SNO 10 Plus
GB
204979 204984
Manufacturer STIEBEL EL-
TRON STIEBEL EL- TRON
Load profile XXS XXS
Energy efficiency class A A
Energy conversion effi-
ciency % 38 38
Annual power con-
sumption kWh 483 493
Default temperature
setting °C 55 55
Sound power level dB(A) 15 15
Daily power consump-
tion kWh 2,23 2,29
13.5 Heat-up diagram
The heat-up period depends on the degree of scaling and resid-
ual heat. For the heat-up time for a cold water supply at 10°C
and a maximum temperature setting, see the diagram.
35 40 45 50 55 60 65 70 75 80 85
0
5
10
15
20
25
30
1
2
D0000107415
1 SNO 10 Plus (GB) 2 SNO 5 Plus (GB)
Y Heat-up time in minutes X Temperature in °C
13.6 Data table
SNO 5 Plus
GB
SNO 10
Plus GB
204979 204984
Hydraulic data
Nominal capacity l 5 10
SNO 5 Plus
GB
SNO 10
Plus GB
Mixed water amount 40°C
(10°C/65°C) l 9.3 19
Electrical data
Rated voltage 1 V 220 220
Rated voltage 2 V 230 230
Rated voltage 3 V 240 240
Rated output 1 kW 1.8 1.8
Rated output 2 kW 2.0 2.0
Rated output 3 kW 2.2 2.2
Rated current 1 A 8.3 8.3
Rated current 2 A 8.7 8.7
Rated current 3 A 9.1 9.1
Fuse protection 1 A 10 10
Fuse protection 1 A 10 10
Fuse protection 1 A 10 10
Phases 1/N/PE 1/N/PE
Frequency Hz 50-60 50-60
Application limits
Temperature setting range °C 35 – 85°C 35 – 85°C
Maximum permissible
pressure MPa 0.0 0.0
Maximum flow rate l/min 5 10
Energy data
Standby energy consump-
tion/24 h at 65°C kWh 0.17 0.27
Energy efficiency class A A
Versions
IP rating IP IP 24 D IP 24 D
Installation type Oversink Oversink
Type Vented Vented
Inner cylinder material Plastic Plastic
Thermal insulation material EPS + VIP EPS
Casing material Plastic Plastic
Colour White White
Connections
Water connection G 1/2A G 1/2A
Dimensions
Depth mm 212 282
Height mm 423 505
Width mm 240 290
Weights
Weight kg 3.0 4.6
14 Guarantee
The guarantee conditions of our German companies do not ap-
ply to appliances acquired outside of Germany. In countries
where our subsidiaries sell our products a guarantee can only
be issued by those subsidiaries. Such guarantee is only granted
if the subsidiary has issued its own terms of guarantee. No other
guarantee will be granted.
We shall not provide any guarantee for appliances acquired in
countries where we have no subsidiary to sell our products. This
will not affect warranties issued by any importers.
15 Environment and recycling
uDispose of the appliances and materials after use in accord-
ance with national regulations.
en

Environment and recycling
10 | SNO 5 - 10 Plus GB www.stiebel-eltron.com
uIf a crossed-out waste bin is pictured on the ap-
pliance, take the appliance to your local waste
and recycling centre or nearest retail take-back
point for reuse and recycling.
This document is made of recyclable paper.
uDispose of the document at the end of the appli-
ance's life cycle in accordance with national reg-
ulations.

www.stiebel-eltron.com SNO 5 - 10 Plus GB | 11

Comfort through Technology
STIEBEL ELTRON International GmbH
Dr.-Stiebel-Straße 33 | 37603 Holzminden | Germany
[email protected] | www.stiebel-eltron.com
FR
4 017213 532927
A 353292-45663-9862