STIEBEL ELTRON DHB 18 STi, DHB 21 STi, DHB 27 STi, DHB 24 STi Operating And Installation

BEDIENUNG UND INSTALLATION OPERATING AND INSTALLATION UTILISATION ET INSTALLATION GEBRUIK EN INSTALLATIE
OBSŁUGA I INSTALACJA OBSLUHA A INSTALACE
HASZNÁLATI ÉS TELEPÍTÉSI ÚTMUTAT
Ó
UPRAVLJANJE IN NAMESTITEV
Elektronisch gesteuerter Durchlauferhitzer | Electronically controlled
instantaneous water heater | Chauffe-eau instantan
é à
gestion électronique
| Elektronisch gestuurde elektrische doorstromer | Elektronicznie sterowany
przepływowy ogrzewacz wody | Elektronicky
ří
zený průtokový ohřívač | Elektromos
vez
érlésű á
tfolyós vízmelegítő| Elektronsko krmiljen pretočni grelnik
» DHB 18 STi » DHB 21 STi » DHB 24 STi » DHB 27 STi
18 | DHB STi www.stiebel-eltron.com
CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information ��������������������������������������� 19
1.1 Safety instructions ���������������������������������������������� 19
1.2 Other symbols in this documentation ���������������������� 19
1.3 Units of measurement ����������������������������������������� 19
2. Safety �������������������������������������������������������� 19
2.1 Intended use ����������������������������������������������������� 19
2.2 General safety instructions �����������������������������������19
2.3 Test symbols ����������������������������������������������������� 19
3. Appliance description ������������������������������������� 20
4. Operation ��������������������������������������������������� 20
4.1 Recommended settings ��������������������������������������� 20
5. Cleaning, care and maintenance ������������������������� 20
6. Troubleshooting �������������������������������������������� 20
INSTALLATION
7. Safety �������������������������������������������������������� 21
7.1 General safety instructions ����������������������������������� 21
7.2 Instructions, standards and regulations ������������������� 21
8. Appliance description ������������������������������������� 21
8.1 Standard delivery ����������������������������������������������� 21
8.2 Accessories ������������������������������������������������������� 21
9. Preparations ������������������������������������������������ 22
9.1 Installation site �������������������������������������������������� 22
9.2 Water installation ����������������������������������������������� 22
10. Installation �������������������������������������������������� 23
10.1 Standard installation ������������������������������������������� 23
11. Commissioning ��������������������������������������������� 25
11.1 Initial start-up ��������������������������������������������������� 25
11.2 Recommissioning ����������������������������������������������� 25
12. Shutdown ��������������������������������������������������� 25
13. Alternative installation options ��������������������������� 25
13.1 Electrical connection from above on unfinished walls �� 25
13.2 Electrical connection on finished walls �������������������� 26
13.3 Large conductor cross-section for electrical connection from below ���������������������������������������� 26
13.4 Connecting a load shedding relay ��������������������������� 26
13.5 Water installation on finished walls ������������������������26
13.6 Water installation on finished walls with brazing/ compression fitting ��������������������������������������������� 27
13.7 Water installation on finished walls; fitting the appliance cover �������������������������������������������������27
13.8 Installation of lower back panel with threaded fittings on finished walls ������������������������������������������������ 27
13.9 Wall mounting bracket when replacing an appliance ��� 27
13.10 Installation with offset tiles ����������������������������������� 27
13.11 Pivoting appliance cover ��������������������������������������28
14. Troubleshooting �������������������������������������������� 29
15. Maintenance ������������������������������������������������ 30
16. Specification ������������������������������������������������ 30
16.1 Dimensions and connections ��������������������������������� 30
16.2 Wiring diagram ������������������������������������������������� 30
16.3 DHW output ������������������������������������������������������ 31
16.4 Application areas/ conversion table ����������������������� 31
16.5 Pressure drop ��������������������������������������������������� 31
16.6 Fault conditions �������������������������������������������������31
16.7 Country-specific approvals and certifications: Germany 31
16.8 Details on energy consumption ������������������������������ 32
16.9 Data table �������������������������������������������������������� 32
GUARANTEE
ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
- The appliance may be used by children aged 8 and older and persons with reduced physical, sensory or mental capabilities or a lack of ex­perience and know-how, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the resulting risks. Children must never play with the appliance. Children must never clean the ap­pliance or perform user maintenance unless they are supervised.
- Risk of burns: the tap can reach temperatures in excess of 55°C.
- Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3mm contact separation.
- Secure the appliance as described in chapter "In­stallation/ Installation".
- Observe the maximum permissible pressure (see chapter "Installation/ Specification/ Data table").
- Drain the appliance as described in chapter "In­stallation/ Maintenance/ Draining the appliance".
OPERATION
General information
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ENGLISH
OPERATION
1. General information
The chapters "Special Information" and "Operation" are intended for both the user and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note
Read these instructions carefully before using the appli­ance and retain them for future reference. Pass on the instructions to any new user where appro­priate.
1.1 Safety instructions
1.1.1 Structure of safety instructions
!
KEYWORD Type of risk Here, possible consequences are listed that may result from failure to observe the safety instructions.
Steps to prevent the risk are listed.
1.1.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns (burns, scalding)
1.1.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
1.2 Other symbols in this documentation
Note
General information is identified by the adjacent symbol.
Read these texts carefully.
Symbol Meaning
Material losses (appliance damage, consequential losses and environmen­tal pollution)
Appliance disposal
This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.3 Units of measurement
Note
All measurements are given in mm unless stated oth­erwise.
2. Safety
2.1 Intended use
The appliance is intended for heating domestic hot water and can supply one or more draw-off points.
This appliance is intended for domestic use. It can be used safely by untrained persons. The appliance 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.
Any other use beyond that described shall be deemed inappropri­ate. Observation of these instructions and of instructions for any accessories used is also part of the correct use of this appliance.
2.2 General safety instructions
CAUTION Burns During operation, the tap can reach temperatures in ex­cess of 55°C. There is a risk of scalding at outlet temperatures in ex­cess of 43°C.
!
WARNING Injury The appliance may be used by children aged 8 and older and persons with reduced physical, sensory or mental capabilities or a lack of experience and know-how, pro­vided that they are supervised or they have been in­structed on how to use the appliance safely and have understood the resulting risks. Children must never play with the appliance. Children must never clean the ap­pliance or perform user maintenance unless they are supervised.
!
Material losses
The user should protect the appliance and its tap against frost.
2.3 Test symbols
See type plate on the appliance.
!
!
OPERATION
Appliance description
20 | DHB STi www.stiebel-eltron.com
3. Appliance description
You can adjust the DHW outlet temperature via the temperature selector. From a flow rate of approx. 3 l/min and above, the control unit regulates the correct heating output, subject to the tempera­ture setting and cold water temperature.
Heating system
The bare wire heating system has a pressure-tested plastic casing. The heating system is suitable for (both) soft and hard water and is largely resistant to scale build-up. This heating system ensures rapid and efficient DHW availability.
Note
The appliance is equipped with an air detector that large­ly prevents damage to the heating system. If, during op­eration, air is drawn into the appliance, the appliance shuts down for one minute, thereby protecting the heat­ing system.
4. Operation
The DHW outlet temperature can be adjusted in 3 stages.
26�02�02�0951
1
2
3
1 Hand wash basin (approx. 35°C) 2 Shower / bath (approx. 45°C) 3 Kitchen sink (approx. 55°C)
Turn the temperature selector to the required position.
Should the outlet temperature fail to reach the required level with the tap fully open and the temperature selector set to maximum, then more water is flowing through the appliance than can be heated by the heating element.
Reduce the flow rate at the tap.
4.1 Recommended settings
Thermostatic valve
If you operate the appliance with a thermostatic valve, we rec­ommend that you set the temperature on the appliance to the maximum level (kitchen sink). You can then select the required temperature using the thermostatic valve.
Following an interruption of the water supply
!
Material losses
To ensure that the bare wire heating system is not dam­aged following an interruption to the water supply, the appliance must be restarted in the following sequence.
Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
Switch the mains power back ON again.
5. Cleaning, care and maintenance
Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling agents.
6. Troubleshooting
Problem Cause Remedy
The appliance will not start despite the DHW valve being fully open.
There is no power.
Check the fuses/MCBs in your fuse box/distribu­tion panel.
The aerator in the tap or the shower head is scaled up or contami­nated.
Clean and/or descale the aerator or shower head.
The water supply has been interrupted.
Vent the appliance and the cold water supply line (see chapter "Operation/ Recommended settings/ Following an interruption to the water supply").
Whilst hot water is being drawn off, initially cold water flows for a short period.
The air sensor detects air in the water and briefly switches the heater off.
The appliance restarts automatically after 1minute.
If you cannot remedy the fault, notify your qualified contractor. To facilitate and speed up your request, provide the number from the type plate (000000-0000-000000).
D0000051866
DHB ... STi
INSTALLATION
Safety
www.stiebel-eltron.com DHB STi | 21
ENGLISH
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis­sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free functioning and operational reliabil­ity only if original accessories and spare parts intended for the appliance are used.
!
Material losses
Observe the maximum permissible inlet temperature (see chapter "Installation/ Specification/ Data table"). Higher temperatures may damage the appliance. You can limit the inlet temperature by means of a central thermostatic valve (see chapter "Installation/ Appliance description/ Accessories").
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations and instructions.
- The IP 25 (hoseproof) rating can only be ensured with a cor­rectly fitted cable grommet.
- The specific electrical resistance of the water must not fall below that stated on the type plate. In a linked water net­work, factor in the lowest electrical resistance of the water (see chapter "Installation/ Specification/ Data table"). Your water supply utility will advise you of the specific electrical water resistance or conductivity.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- Wall mounting bracket
- Installation plate
- 2 twin connectors
- Cold water 3-way ball shut-off valve
- DHW tee
- Flat gaskets
- Strainer
- Flow limiter
- Plastic profile washer
- Plastic connection pieces/ installation aid
- Cover guides
8.2 Accessories
Taps
- MEKD mono lever kitchen pressure tap
- MEBD mono lever bath pressure tap
Plug G½A
If you use pressure taps on finished walls other than those rec­ommended in the accessories, please use plugs.
Installation set for finished walls
- Brazing fitting - copper pipe for brazed connection Ø12mm
- Compression fitting - copper pipe
- Compression fitting - plastic pipe (suitable for Viega: San­fix-Plus or Sanfix-Fosta)
Universal mounting frame
- Mounting frame with electrical connections
Pipe assembly for undersink appliances
You will need the undersink installation set if you make the water connections (G⅜A) at the top of the appliance.
Pipe assembly for offset installation
You will need this pipe assembly set if you intend to offset the appliance by 90mm downwards from the water connection.
Pipe assembly for replacing a gas water heater
You will need this pipe assembly set if the existing installation has gas water heater connections (cold water connection on the left-hand side, DHW connection on the right-hand side).
Pipe assembly DHB water plug-in couplings
Use the water plug-in couplings if the existing installation has water plug-in connections from an instantaneous water heater.
Load shedding relay (LR 1-A)
The load shedding relay for installation in the distribution board provides priority control for the instantaneous water heater when other appliances, such as electric storage heaters, are being op­erated simultaneously.
INSTALLATION
Preparations
22 | DHB STi www.stiebel-eltron.com
9. Preparations
9.1 Installation site
!
Material losses
Install the appliance in a room free from the risk of frost.
Always install the appliance vertically and near the draw-off
point.
The appliance is suitable for undersink and oversink installations.
Undersink installation
1
2
26�02�02�0844
1 Cold waterInlet 2 DHW outlet
Oversink installation
2 1
26�02�02�0845
1 Cold waterInlet 2 DHW outlet
Note
Mount the appliance on the wall. The wall must have
a sufficient load-bearing capacity.
9.2 Water installation
- A safety valve is not required.
- Never operate with preheated water. Flush the water line thoroughly.
Taps
Use suitable pressure taps/valves (see chapter "Installation/ Appliance description/ Accessories"). Open vented taps are not permitted.
Note
Never use the 3-way ball shut-off valve in the cold water inlet to reduce the flow rate. The 3-way ball shut-off valve is intended to shut off the appliance.
Permissible water line materials
- Cold water inlet line:
Pipes made from galvanised steel, stainless steel, copper or plastic
- DHW outlet line:
Pipes made from stainless steel, copper or plastic
!
Material losses
If plastic pipework is used, take into account the max­imum inlet temperature and the maximum permissible pressure (see chapter "Installation/ Specification/ Data table").
Flow rate
Ensure that the flow rate for switching on the appliance is
achieved (see chapter "Installation/ Specification/ Data table", On).
Increase the water line pressure if the required flow rate is
not achieved when the draw-off valve is fully open. If the flow rate is not reached despite increasing the pressure, re­move the flow limiter and install the plastic profile washer.
2
1
26�02�02�0820
1 Flow limiter 2 Plastic profile washer
Note
For the thermostatic valve to function correctly, the flow limiter must not be replaced with the plastic profile wash­er.
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