How it Works
STIEBEL ELTRON
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DEL 18 SL

STIEBEL ELTRON DEL 18 SL, DEL 27 SL, DEL 21 SL, DEL 24 SL Operation And Installation

OPERATION AND INSTALLATION
Electronically controlled instantaneous water heater
» DEL 18/21/24 SL electronic LCD » DEL 27 SL electronic LCD
M1
Tmax
M2
CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
OPERATION
1. General information 23
1.1 Safety instructions 23
1.2 Other symbols in this documentation 23
1.3 Units of measurement 23
2. Safety 23
2.1 Intended use 23
2.2 General safety instructions 23
2.3 CE designation 24
2.4 Test symbols 24
3. Appliance description 24
4. Settings and displays 25
4.1 User interface 25
4.2 Temperature limit (child-proofing) 25
4.3 Inlet temperature information 26
4.4 Following a
n interruption to the water supply 26
5. Cleaning, care and maintenance 26
6. Troubleshooting 26
INSTALLATION
7. Safety 27
7.1 General safety instructions 27
7.2 Instructions, standards and regulations 27
8. Appliance description 27
8.1 Standard delivery 27
8.2 Accessories 27
9. Preparations 28
9.1 Installation site 28
10. Installation 29
10.1 Standard installation 29
10.2 Completing the installation 31
10.3 Installation options 31
11. Commissioning 34
11.1 Initi
al start-up 34
11.2 Recommissioning 35
12. Shutting down the system 35
13. Troubleshooting 35
13.1 Service mode 35
13.2 Indicator options for LED diagnostic traffic light 36
13.3 Fault table 36
14. Maintenance 36
15. Specification 37
15.1 Dimensions and connections 37
15.2 Wiring diagram 37
15.3 DHW output 38
15.4
38
15.5 Pressure drop 38
15.6 Fault conditions 38
15.7 Details on energy consumption 38
15.8 Data table 39
WARRANTY
ENVIRONMENT AND RECYCLING
SPECIAL INFORMATION
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The appliance may be used by children aged 8 and up 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 appli
ance. Children must never clean the appliance or perform user maintenance unless they are supervised.
Risk of scalding: The tap can reach tempera-
tures in excess of 50°C
Ensure the appliance can be separated from the power supply by an isolator that discon­nects all poles with at least 3mm contact sep­aration.
Secure the appliance as described in chapter "Installation / Installation”.
Observe the maximum permissible pressure (see chapter “Specification / Dat table”).
Drain the appliance as described in chapter "Installation / Maintenance / Draining the appliance”.
ENGLISH
OPERATION
General information
OPERATION
1. General information
The chapter "Operation" is intended for appliance users
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 a new user if required.
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 here.
1.1.2 Symbols, type of risk
Symbol Type of risk
!
Injury
Electrocution
Burns or 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-serious or minor injury.
1.2 Other symbols in this documentation
Note
Notes are bordered by horizontal lines above and below
the text. General information is identified by the symbol
shown on the left.
Read these texts carefully.
Symbol
!
Material losses (appliance damage, consequential losses and environmental pollution)
Appliance disposal
This symbol indicates that you have to do something. The action you need to take is described step by step.
1.3 Units of measurement
Note
Unless specified otherwise, all dimensions are
given in mm.
2. Safety
2.1 Intended use
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.
This pressure-tested appliance is suitable for heating domestic hot water or for reheating preheated water. The appliance can supply one or more draw-off points.
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 50°C, e.g. in the case of water that has been preheated by solar energy. 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 up and persons with reduced physical, sensory or mental capabilities or a lack of experience and know-how, provided that they are supervised or they havebeen 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.
ENGLISH
OPERATION
Where children or persons with limited physical, sensory or men tal abilities are allowed to use this appliance, we recommend a permanent temperature limit. The limit can be set by you or a contractor:
- The temperature limit (child-proofing) is user adjustable
- Anti-scalding protection can be enabled by a qualified contractor.
!
Damage to the appliance and environment Protect the appliance and its tap against frost.
2.3 CE designation
The CE designation shows that the appliance meets all essential requirements according to the:
- Low Voltage Directive
- Electromagnetic Compatibility Directive The maximum permissible mains impedance is indicated in chapter "Specification".
2.4 Test symbols
See type plate on the appliance
Country-specific approvals and certifications: Germany
In line with [German] State Building Regulations, a
general test certificate has been issued for the appliance, as verification of its suitability regarding noise emissions.
DIN 4109
PA-IX 6816/I
3. Appliance description
The electronically controlled instantaneous water heater with automatic output matching maintains a consistent outlet temperature. This is irrespective of the inlet temperature, up to the maximum output of the appliance.
DHW temperature
The DHW outlet temperature can be variably adjusted. The selected temperature is displayed.
Display backlighting
Temperature limit (child-proofing)/ anti-scalding protection
The display has white backlighting. During the draw-off process or a temperature adjustment, backlighting is enabled.
The temperature limit (child-proofing) can be individually
set using the Tmax key. The selected temperature then limits the setting range of the DHW outlet temperature.
The qualified contractor can also enable static anti-scalding
protection from 43 for you (see chapter “Alternative installation options/ Anti-scalding protection”). The anti­scalding temperature then functions as the upper limit for the DHW outlet temperature and for the temperature limit
(child-proofing).
Heating system
The heating system is suitable for hard and soft water areas; it has low susceptibility to scale build-up. This system ensures rapid and efficient DHW availability.
Note The appliance is equipped with an air detector, which largely prevents damage to the heating system. If, during operation, air is drawn into the appliance, heating out put is shut down automatically for one minute, thereby protecting the heating system.
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Appliance description
ENGLISH
OPERATION
4. Settings and displays
4.1 User interface
M1
Tmax
M2
D000004 0726
2
3
1
5
4
1 Temperature selector 2 LED scalding risk indicator 3 Memory keys M1 and M2 4 Display
Temperature limit T max5
Display symbols
1
2
3
4
D00000 4098 9
1 In the event of an appliance fault, a spanner appears
The temperature limit can be individually set between 30
°C
and 60
°C
2 Segment display for temperature setting with °C
Performance bar, 10-100%3
4 Tmax, displayed when temperature limit is enabled
Setting the temperature
M1
Tmax
M2
D0000040 726
2
1
3
1
2 Call up preferred temperatures
Set temperature setting range 30 - 60°C (without end-stop) 35°C to 43°C in 0.5°C increments, other temperature ranges in 1°C incerments
3 Set the temperature limit
Memory keys M1 and M2 can each be assigned a preferred temperature.
Select a preferred temperature. Press one of the M keys for 3 seconds to save the
preferred temperature . The temperature is confirmed with 1x flashing.
!
Note
If the outlet temperature is not sufficiently high when
the draw-off valve is fully open and the temperature selector is set to maximum, then more water is
flowing through the appliance than can be heated
by the heating system (working at maximum output).
Reduce the water volume at the draw-off valve until the required temperature delivery is achieved.
4.2 Temperature limit (child-proofing)
M1
Tmax
M2
D00000 40981
Enabling the temperature limit (child-proofing)
Press and hold the Tmax key for > 6 seconds.The set value display flashes and the current temperature limit is shown. The value for the temperature limit can be changed while the display is flashing. If no key is pressed for 10 seconds, the display stops flashing and the value is stored. The display then shows the set value and the Tmax symbol.
Disabling the temperature limit (child-proofing)
The Tmax symbol on the display is no longer shown.
Press and hold the Tmax key > 6 seconds.
Inlet temperature information
If the inlet temperature is higher than the preferred temperature, e.g. if water has been preheated by solar energy, the display alternates between showing "hot" and the measured inlet
temperature. The LED scalding risk indicator also flashes.
Settings and displays
ENGLISH
OPERATION
4.3 Inlet temperature information
If the inlet temperature is higher than the preferred temperature, e.g. if water has been preheated by solar energy, the display alternates between showing "hot" and the measured inlet temperature. The LED scalding risk indicator also flashes.
Recommended setting for operation with a thermostatic valve and water preheated by solar energy
Set the temperature at the appliance to the max. temperature.
4.4
Following an interruption to the water supply
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Material losses
Following an interruption of the water supply the appliance must be recommissioned by carrying out the following steps, in order to prevent the destruction of the bare wire heating system.
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/valves regularly. Limescale deposits at the spouts can be removed using commercially available descaling agents.
6. Troubleshooting
Fault Cause Remedy
The appliance will not start despite the DHW valve being fully open.
There is no voltage in the appliance.
Check the fuses/MCBs in your fuse box.
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 inlet line (see chapter "Settings / Following an interruption to the water supply").
Cold water flows briefly while hot water is being drawn.
The air sensor detects air in the water and the ap ­pliance's heating output is briefly switched off.
The appliance restar ts automatically after 1 minute.
The temperature at the appliance cannot be set to > 43 °C
The child-proof ing Tmax is enabled.
Disable the child-proofing (see chapter "Appliance description")
The anti-scalding protec ­tion in the appliance is enabled.
Your qualified contractor can disable the anti-scald ­ing protection for you.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial number from the type plate (000000-0000-000000):
No.: 000000-0000-000000
DEL ... SL
26_02_02_1125_
Cleaning, care and maintenance
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