STIEBEL ELTRON SNU 5 Plus 1 kW Small Water Heater Instruction Manual

STIEBEL ELTRON SNU 5 Plus 1 kW Small Water Heater

Product Information

Specifications

• Model: SNU 5 Plus / SNU 5 Plus AU / SNU 5 Plus GB / SNU 5 Plus 1 kW
• Type: Small water heater (non-pressurized)

Product Usage Instructions

Special Information

• Please read these instructions carefully before using the appliance and keep them for future reference. Make sure to pass on these instructions to others if necessary.
• Note: For users in Australia and New Zealand, the appliance must be installed under the Plumbing Code of Australia (PCA) and the New Zealand Building Code.

Symbols in this Document

• Symbol: Indicates possible property damage, equipment damage, consequential damage, or environmental damage.
• Symbol: Indicates that you need to perform a specific action.
• Symbol: Indicates prerequisites that must be fulfilled before proceeding with the following steps.
• Symbol: Indicates a result or intermediate result.
• Symbol: Indicates the software menu level.
• Symbol: Indicates a reference to the corresponding page number.

Safety Structure of the Warning Notices

• Section-specific warning notices: These apply to all steps within the section and are identified by the “CAUTION” symbol.
• They highlight potential risks, consequences of failure to observe the warning notice, and hazard prevention measures.
• Embedded warning notices: These apply only to the subsequent step and provide specific instructions or cautions related to that step.

General Information

• The general information section provides additional information about the appliance and its installation. Refer to this section for any general inquiries or concerns.

Shutting Down the System

• This section provides instructions on how to properly shut down the system when necessary. Follow these steps to ensure safe and efficient operation.

Specification

• Refer to this section for detailed dimensions, connections, wiring diagram, heat-up diagram, energy consumption data, and data table related to the appliance.

Guarantee

• This section provides information about the guarantee or warranty for the product. Refer to this section for any questions or concerns regarding product defects or malfunctions.

Environment and Recycling

• This section discusses the importance of environmental considerations and recycling practices when dealing with the product.
• Follow the guidelines provided to minimize environmental impact.

FAQ

Q: What should I do if I encounter a problem with the appliance?

• A: Please refer to the Troubleshooting section in the user manual for instructions on how to troubleshoot common issues.
• If the problem persists, contact a professional installer or the manufacturer for further assistance.

Q: Where can I find the type plate on the appliance?

• A: The type plate is located on the appliance itself. Please refer to it for important information and specifications about your specific model.

Q: Are there any specific safety precautions I should be aware of?

• A: Yes, please review the Safety section in the user manual for important safety information and precautions to ensure the safe operation of the appliance.

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 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 appliance.
• Cleaning and user maintenance must not be carried out by children without supervision.
• 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 authorized by the manufacturer. Use the original spare part. Otherwise, you risk damaging the appliance.
• Never connect the appliance via an external switching facility such as a time switch.
• Secure the appliance as described in the chapter “Installation / Appliance installation”.
• The appliance must only be installed with an open (non-pressurized) tap.
• Never subject the appliance to water pressure.
• 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-pressure-used water heaters.
• Never extend the tap outlet with a hose.

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.

Information for Australia and New Zealand

• This appliance must be installed under the Plumbing Code of Australia (PCA) and the New Zealand Building Code.

Symbols in this document

Test mark

• See the type plate on the appliance.
• Units of measurement
• All measurements are given in mm unless stated otherwise.

Safety

• Structure of the warning notices

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 notice
• Hazard prevention measure(s)
• Property damage, consequential losses, environmental pollution
• NOTICE Type and source of risk
• Consequence(s) of failure to observe the warning notice Hazard prevention measure(s)

Embedded warning notices

• Embedded warning notices apply only to the subsequent step.
• SIGNAL WORD: Consequence(s) of failure to observe the warning notice. Hazard prevention measure(s). Step to which the warning notice refers

Key to symbols

Signal words

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

Intended use

• This open-vented (non-pressurized) 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-pressurized) 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 instructions for any accessories used is also part of the intended use of this appliance.

NOTICE Property damage

• The appliance is designed for undersink installation.
• During installation, the water connections on the appliance must point upwards.

Safety instructions

• There is a risk of scalding at outlet temperatures over 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 temperatures. Refer to the plumbing code of Australia (PCA), local requirements, and installation instructions to determine if additional delivery temperature control is required.
• Where children or persons with limited physical, sensory, or mental abilities are allowed to use this appliance, we recommend a permanent temperature limit. A qualified contractor can set this limit.

Possible property damage

• Frost can destroy the appliance and the connected tap. Protect the appliance and the tap against frost.
• Warning – For continued safety of this appliance it must be installed, operated, and maintained under the manufacturer’s instructions.
• Never subject the appliance to water pressure. 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-pressurized 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, commissioning, maintenance, and repair of the appliance.
• Unsuitable spare parts and accessories may jeopardize user and product safety. Always use original spare parts and original accessories.

Appliance description

Function

• The open-vented (non-pressurised) appliance is only suitable for under-sink installation. The appliance is intended to heat cold water to supply a single draw-off point. It must only be used with a non-pressurized tap.

Thermostop function

• The thermostat function (thermal separation) prevents the tap from becoming hot in standby mode.

Anti-drip function

• The anti-drip function prevents expansion water from escaping from the tap during heating. When water is heated, gas bubbles are formed. The amount of gas bubbles depends on the water quality.
• At temperatures >75 °C, the rising gas bubbles can cause residual water to drip from the tap outlet.
• Subject to design, some taps tend to drip for a short while after being closed. This dripping is caused by residual water escaping from the tap outlet and is not linked to expansion water.

Standard delivery

• The following are delivered with the appliance:
• Wall mounting bracket
• Drilling template

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.

Installation (qualified contractors)

Installation site

NOTICE Property damage

• The water in the appliance may freeze and damage the cylinder and connections by expansion.
• Only install the appliance in a room free from the risk of frost.

Property damage

• Mount the appliance on the wall. The wall must have sufficient load-bearing capacity.

Property damage

• The appliance is designed for undersink installation.
• During installation, the water connections on the appliance must point upwards.
• Ensure that the appliance is freely accessible for maintenance work.
• Always install the appliance vertically and near the draw-off point.

Appliance installation

• Mark out the holes for drilling using the installation template.
• Drill the holes and insert suitable raw plugs.
• Secure the wall mounting bracket using suitable screws.
• Hang the appliance on the wall mounting bracket.
• Surplus connecting cables can be stored in the cable storage.

Water connection

• NOTICE Property damage
• The appliance may develop a leak and cease functioning.
• Never subject the appliance to water pressure.
• Never interchange the water connections.
• Set the flow rate (see tap instructions). Observe the maximum permissible flow rate with a fully opened tap (see chapter “Specification / Data table”).
• Match up the color coding on the tap water connections and the appliance:
• R.h. side blue = “Cold water inlet”
• L.h. side red = “DHW outlet”
• Secure the water connections from the tap to the appliance.
• NOTICE: When tightening the fittings, counter hold with a suitable spanner.
• NOTICE: Ensure that the water connections are not kinked during installation. Prevent any tension during installation.

Commissioning (qualified contractors)

• NOTICE: Do not connect the power supply until the appliance is filled with water!

WARNING Electrocution

• Incorrect installation and commissioning can cause serious injury.
• Commissioning may only be carried out by a qualified contractor under safety regulations.

Filling the appliance with water

• Open the cold water inlet of the distribution board.

Operation

• SNU 5 Plus  AU  GB 1 kW www.stiebel-eltron.com
• Either 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.
• Check the entire hydraulic installation for tightness.

Electrical connection

WARNING

• Electrocution when the appliance is permanently connected to the mains
• 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.

Electrocution

• Ensure that the appliance is connected to the earth conductor.

Overvoltage

• The voltage specified on the type plate must match the main power supply.
• Establish the electrical connection by plugging in the standard plug or by a permanent connection.

The following electrical connections are permissible:

SNU 5 AU| SNU 5

Plus GB

---|---
Connection to a freely accessible standard socket with a matching plug| x|
Permanent connection to an appliance socket with an earth conductor| x| x

Setting a permanent temperature limit

• Placing the limiting ring behind the temperature selector allows you to limit the setting range of the temperature selector to a specific maximum temperature.
• Turn the temperature selector to zero (fully anti-clockwise).
• Pull off the temperature selector.
• Undo the two screws securing the limiting ring in the casing.
• Re-insert the limiting ring with the required temperature limit.
• Secure the limiting ring in the casing with the screws.
• Push the temperature selector back on its shaft in the zero position (fully anti-clockwise).
• You can set the required hot water outlet temperature steplessly at the temperature selector (2). During the heating process, the heat-up and index indicator (1) lights up.

1. Heat-up and index indicator
2. Temperature selector

• Depending on the system, the actual temperatures may vary from the set value.
• In 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 temperature limit on the appliance.

Cleaning

• Almost every type of water will deposit limescale at high temperatures.
• Limescale will settle inside the appliance and affect its function and service life. The heating elements must therefore be descaled if necessary.
• A qualified contractor who is aware of the local water quality will tell you when the next descaling is due.
• A damp cloth is sufficient for cleaning the appliance. Never use abrasive or corrosive cleaning agents.
• Check the tap regularly. You can remove limescale deposits at the outlet using commercially available descaling agents.

Maintenance (qualified contractors)

WARNING

• Electrocution Risk of serious injury from an open appliance
• Before any work on the appliance, disconnect all poles of the appliance from the power supply.
• Dismantle the appliance for maintenance work.

Draining the appliance

WARNING

Burns

• Hot water may escape when draining the appliance.
• Avoid all contact with escaping water.
• Isolate the appliance from the power supply.
• Undo the fittings on the water connections.
• Remove the appliance from the wall mounting bracket.
• Allow the appliance to drain into a sink with the water connections pointing downwards.
• Lightly shake the appliance to aid in draining.

Opening the appliance

• Turn the temperature selector anti-clockwise as far as it will go.
• Pull off the temperature selector.
• Remove the two screws behind the temperature selector.
• Pull off the limiting ring.
• Insert a small screwdriver into the openings at the bottom and carefully lift the appliance cover slightly.
• Push and pivot the appliance cover upwards and remove it.

Descaling the appliance

• NOTICE:  Never treat the cylinder surface with descaling agents as these can damage the plastic.
• Open the appliance.
• Remove the flanged immersion heater.
• Carefully tap the heating element to remove coarse limescale deposits.
• Immerse the heating element up to the flange plate in a de-scaling agent.
• Carry out descaling under the instructions provided by the descaling agent manufacturer.
• After descaling, flush the heating element with clear water. Reassemble the appliance.

Cleaning/replacing the strainer

• Detach the “cold water inlet” connection.
• Using pliers, remove the strainer from the “cold water inlet” connection.
• Descale or replace the strainer.

Checking the earth conductor (DGUV V3)

• Pull off the temperature selector.
• Check the earth conductor (in Germany DGUV V3 for example) across a limiting ring fixing screw and the earth conductor contact of the connecting cable.
• Replacing the connecting cable
• NOTICE: The connecting cable must only be replaced with an original spare part by a qualified contractor.
• Positioning the temperature sensor in its protective pipe
• When replacing the temperature controller, guide the temperature sensor into its protective pipe.
• Secure the temperature sensor in place below the earthed plug.

Troubleshooting (users)

turning the tem- perature selector.
 | No voltage at the ap- pliance.| Check the plug/fuses in the distribution board.
Problem| Cause| Remedy
---|---|---
The appliance does not supply hot water.| The temperature selector is rotated anti-clockwise as far as it wil l go . __| Switch the appliance on by turning the temperature selector.
 | No voltage at the appliance.| Check the plug/fuses in the distribution board.

• If you cannot remedy the fault, contact a qualified contractor.
• To facilitate and speed up your inquiry, please provide the qualified contractor with the number from the type plate.

Troubleshooting (installers)

controller. Allow the appliance to cool down. If you have isolated the appliance from the power supply, the high-limit safety cut-out will be reset automatically.
 | The strainer is soiled.| Clean / replace the strainer in the “cold water inlet” connection.
Loud boiling noises inside the appliance.| The appliance is scaled up.| Describe the appliance.
The tap drips for a while after it has been closed.| The residual water is not held in the tap outlet.| Replace the aerator in the tap outlet, the tap outlet, or the tap.
 | The maximum flow rate of the appliance has been exceeded.| Reduce the maximum flow rate of the tap to the maximum flow rate of the appliance.
The tap drips when the appliance is heating up.| The tap is unsuitable.| Replace the tap. __
The anti-drip function is faulty.| Replace the appliance.

Shutting down the system

• Isolate the appliance from the power supply by removing the plug or by switching off the MCB in the distribution board.
• Drain the appliance (see chapter Draining the appliance [} 17]).

Specification

Dimensions and connections

Wiring diagram

1/N/PE | 220 – 240 V

Heat-up diagram

The heat-up period depends on the degree of scaling and residual heat. The heat-up time with a cold water inlet of 10 °C and the maximum temperature setting can be read off the diagram.

• 1 SNU 5 Plus 1 kW 2 SNU 5 Plus (all others)
• Y Heat-up time in minutes X Temperature in °C

Energy consumption data

• The product data complies with EU regulations relating to the directive on the ecodesign of energy-related products (ErP).

 |  | SNU 5 Plus| SNU 5 Plus

1 kW

---|---|---|---
 |  | 204972| 204973
Manufacturer|  | STIEBEL ELTRON| STIEBEL ELTRON
Load profile|  | XXS| XXS
Energy efficiency class|  | A| A
Energy conversion efficiency| %| 38| 38
Annual power consumption| kWh| 481| 481
Default temperature set- ting| °C| 55| 55
Sound power level| dB(A)| 15| 15
Daily power consumption| kWh| 2.218| 2.218

Data table

 |  | SNU 5 Plus| SNU 5 Plus

1 kW

---|---|---|---
Maximum permissible pressure| MPa| 0.0| 0.0
Maximum flow rate| l/min| 5| 5
Energy data|  |  |
Standby power consumption/ 24 h at 38 °C| kWh| 0.07| 0.07
Standby energy consumption/ 24 h at 65 °C| kWh| 0.19| 0.19
Energy efficiency class|  | A| A
Versions|  |  |
IP rating| IP| IP 24 D| IP 24 D
Installation type|  | Undersink| Undersink
Type|  | Vented| Vented
Inner cylinder material|  | Plastic| Plastic
Thermal insulation material|  | EPS + VIP| EPS + VIP
Casing material|  | Plastic| Plastic
Color|  | White| White
Connections|  |  |
Water connection|  | G 3/8 A| G 3/8 A
Dimensions|  |  |
Depth| mm| 212| 212
Height| mm| 423| 423
Width| mm| 240| 240
Weights|  |  |
Weight| kg| 2.9| 2.9

Guarantee

The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products, a guarantee can only be issued by those subsidiaries. Such a guarantee is only granted if the subsidiary has issued its terms of the 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.
Warranty Stiebel Eltron Australia Only – According to national regulations in Australia Stiebel Eltron Warranty for Small Water Heaters

Who gives the warranty?

1. The warranty is given by Stiebel Eltron (Aust) Pty Ltd (A.B.N. 82 066 271 083) of 294 Salmon Street, Port Melbourne, Victoria, 3207 (“we”, “us” or “our”). The warranty
2. This warranty applies to Stiebel Eltron Small Water Heaters (the “unit”).
3. Subject to the warranty exclusions we will repair or replace, at our absolute discretion, a faulty component in your unit free of charge if it fails to operate under its specifications during the warranty period.
4. If we repair or replace a faulty component in your unit under this warranty, the warranty period is not extended from the time of the repair or replacement.
5. The warranty period commences on the date of completion of the installation of the unit. Where the date of completion of installation is not known, then the warranty period will commence 2 months after the date of manufacture.
6. The warranty period for a unit used for domestic purposes is shown in the table below. Domestic purposes mean that the unit is used in a domestic dwelling.

Component Warranty period

All components are 5 years from the date of completion of the installation of the unit.

7.| The warranty period for a unit used for commercial purposes is shown in the table below. Commercial purposes means that the unit is used for a non- domestic purpose and includes but is not limited to being used in a motel, hotel, mining camp or nursing home.
---|---
 | Component| Warranty period
 | All components| 1 year from the date of completion of the in- stallation of the unit.
Your entitlement to make a warranty claim
8.| You are entitled to make a warranty claim if:
– you own the unit or if you have the owner’s consent to represent the owner of the unit;
– you contact us within a reasonable time of discovering the problem with the unit;
How you make a warranty claim
9.| To make a warranty claim you must provide us with the following information:
– The model number of the unit;
– A description of the problem with the unit;
– The name, address and contact details (such as phone number and e-mail address) of the owner;
– The address where the unit is installed and the loca- tion (e.g. in laundry);
– The serial number of the unit;
– The date of purchase of the unit and the name of the seller of the unit;
– The date of installation of the unit;
– A copy of the certificate of compliance when the unit was installed.
10.| The contact details for you to make your warranty claim are:
 | Name:| Stiebel Eltron (Aust) Pty Ltd
 | Address:| 294 Salmon Street, Port Melbourne, Victoria, 3207
 | Telephone:| 1800 153 351

(8.00 am to 5.00 pm AEST Monday to Friday)

 | Contact person:| Customer Service Representative
 | E-mail:| service@stiebel-eltron.com.au
11.| We will arrange a suitable time with you to inspect and test the unit.
Warranty exclusions
12.| We may reject your warranty claim if:
 | – The unit was not installed by registered and qualified tradespeople.
 |

• The unit was not installed and commissioned:
• in Australia;
• by the Operating and Installation Guide; and
• by the relevant statutory and local requirements of the State or Territory in which the unit is installed.

 | – The unit has not been operated or maintained by the Operating and Installation Guide.
 | – The unit does not bear its original Serial Number or Rating Label.
 |

• The unit was damaged by any or any combination of the following:
• normal fair wear and tear;
• connection to an incorrect water supply;
• connection to water from a bore, dam, or swimming pool;
• connection to an incorrect power supply;
• connection to faulty equipment, such as damaged valves;
• foreign matter in the water supply, such as sludge or sediment;
• corrosive elements in the water supply;
• accidental damage;
• act of God, including damage by flood, storm, fire, lightning strike, and the like;
• excessive water pressure, negative water pressure (partial vacuum), or water pressure pulsation;
• the ingress of vermin.

---|---
 | – The unit was damaged before it was installed e.g. it was damaged in transit.
 | – An unauthorized person has modified, serviced, re- paired or attempted to repair the unit without our consent.
 | – Nongenuine parts other than those manufactured or approved by us have been used on the unit.
13.| We may charge you:
 | – for any additional transport costs if the unit is installed more than 30 kilometers from our closest authorized service technician.
 | – for the extra time it takes our authorized service tech- nician to access the unit for inspection and testing if it is not sited by the Operating and Installation Guide and not readily accessible for inspection.
 | – for any extra costs of our authorized service technician to make the unit safe for inspection.
14.| You must ensure that access to the unit by our authorized service technician is safe and free from obstruction.
15.| Our authorized service technician may refuse to inspect and test the unit until you provide safe and free access to it, at your own cost.
16.| If we reject your warranty claim by clause 12, we may charge you for our authorized service technician’s labor costs to inspect and test the unit.
17.| To properly test the unit we may remove it to another location for testing.
Australian Consumer Law
18.| Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
19.| The Stiebel Eltron warranty for the unit is in addition to any rights and remedies you may have under the Australian Consumer Law.

Environment and recycling

• We would ask you to help protect the environment. After use, dispose of the various materials under national regulations.
• STIEBEL ELTRON International GmbH
• Dr.-Stiebel-Straße 33 / 37603 Holzminden / Germany
• info@stiebel-eltron.com
• www.stiebel-eltron.com

Documents / Resources

| STIEBEL ELTRON SNU 5 Plus 1 kW Small Water Heater [pdf] Instruction Manual
SNU 5 Plus 1 kW Small Water Heater, SNU 5 Plus 1 kW, Small Water Heater, Water Heater, Heater
---|---

References

• eltron.com.au
• STIEBEL ELTRON International

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