Stiebel Eltron FCR 18-28: OPERATION
OPERATION: Stiebel Eltron FCR 18-28

CONTENTS | OPERATION
General information
OPERATION
OPERATION
1. General information ��������������������������������������� 14
1.1 Safety instructions ���������������������������������������������� 14
1.2 Other symbols in this documentation ���������������������� 15
1.3 Units of measurement �����������������������������������������15
1. General information
2. Safety �������������������������������������������������������� 15
The chapter "Operation" is intended for appliance users and quali-
2.1 Intended use �����������������������������������������������������15
fied contractors.
2.2 General safety instructions ����������������������������������� 15
The chapter "Installation" is intended for qualified contractors.
2.3 CE designation �������������������������������������������������� 15
2.4 Test symbols ����������������������������������������������������� 15
Note
3. Appliance description ������������������������������������� 15
Read these instructions carefully before using the appli-
ance and retain them for future reference.
4. Settings ����������������������������������������������������� 16
Pass on the instructions to a new user if required.
4.1 Temperature ����������������������������������������������������� 16
4.2 Rapid heating during dual circuit operation �������������� 16
1.1 Safety instructions
5. Cleaning, care and maintenance ������������������������� 16
6. Troubleshooting �������������������������������������������� 16
1.1.1 Structure of safety instructions
INSTALLATION
KEYWORD Type of risk
7. Safety �������������������������������������������������������� 17
!
Here, possible consequences are listed that may result
7.1 General safety instructions ����������������������������������� 17
from failure to observe the safety instructions.
7.2 Instructions, standards and regulations ������������������� 17
Steps to prevent the risk are listed.
7.3 Water connection and safety assembly �������������������� 17
8. Appliance description ������������������������������������� 17
1.1.2 Symbols, type of risk
8.1 Standard delivery ����������������������������������������������� 17
Symbol Type of risk
8.2 Accessories ������������������������������������������������������� 17
Injury
9. Installation �������������������������������������������������� 17
!
9.1 Power connection ���������������������������������������������� 18
Electrocution
10. Commissioning ��������������������������������������������� 18
10.1 Commissioning ��������������������������������������������������18
Burns
10.2 Recommissioning ����������������������������������������������� 18
(burns, scalding)
11. Settings ����������������������������������������������������� 19
11.1 Temperature �����������������������������������������������������19
1.1.3 Keywords
11.2 Limiting the temperature selection ������������������������� 19
12. Troubleshooting �������������������������������������������� 19
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
13. Maintenance ������������������������������������������������ 19
injury or death.
13.1 Checking the safety assembly �������������������������������� 19
WARNING Failure to observe this information may result in serious
injury or death.
13.2 Descaling the flanged immersion heater ������������������ 19
CAUTION Failure to observe this information may result in non-
13.3 Replacing the heating elements and protective pipe���� 19
serious or minor injury.
14. Specification ������������������������������������������������ 20
14.1 Dimensions, immersion depths and connections ��������20
14.2 Wiring diagrams and connections ��������������������������20
14.3 Specification ����������������������������������������������������� 23
GUARANTEE
ENVIRONMENT AND RECYCLING
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OPERATION
Safety
1.2 Other symbols in this documentation
2.2 General safety instructions
Note
WARNING Electrocution
General information is identified by the symbol shown
Never spray the appliance with water or other liquids.
on the left.
Read these texts carefully.
WARNING Burns
There is a risk of scalding at outlet temperatures in ex-
cess of 43 °C.
Symbol Meaning
Material losses
WARNING Injury
!
(Appliance and consequential losses, environmental pol-
ENGLISH
!
The appliance may be used by children aged 8 and up
lution)
and persons with reduced physical, sensory or mental
Appliance disposal
capabilities or a lack of experience provided that they
are supervised or they have been instructed on how to
use the appliance safely and have understood the result-
This symbol indicates that you have to do something. The ac-
ing risks. Children must never play with the appliance.
tion you need to take is described step by step.
Children must never clean the appliance or perform user
maintenance unless they are supervised.
1.3 Units of measurement
Material losses
!
Note
Condensate can drip from the appliance.
All measurements are given in mm unless stated oth-
Never store objects below the appliance.
erwise.
Note
The appliance is under pressure.
During the heat-up process, expansion water will drip
2. Safety
from the safety valve.
If water continues to drip when heating is complet-
2.1 Intended use
ed, please inform your heating contractor.
The appliance is intended for installation in cylinders in a sealed
heating or DHW heating system.
2.3 CE designation
This appliance is designed for domestic use. It can be used safely
by untrained persons. The appliance can also be used in a non-
The CE designation shows that the appliance meets all essential
domestic environment, e.g. in a small business, as long as it is
requirements according to the:
used in the same way.
- Electromagnetic Compatibility Directive
Any other use beyond that described shall be deemed inappropri-
- Low Voltage Directive
ate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
2.4 Test symbols
Using the appliance for heating fluids other than water or water
See type plate on the appliance.
supplemented with chemicals, such as brine, is also deemed in-
appropriate.
3. Appliance description
The appliance electrically heats DHW and heating water. The
temperature can be adjusted using the temperature selector, de-
pending on the type of appliance or the heating contractor. Once
the selected temperature has been reached the appliance shuts
down. If required, the appliance automatically restarts in single
circuit operation and in dual circuit operation during off-peak tariff
periods / enable times.
The appliance is also protected against frost on the temperature
setting "cold" as long as the power supply is guaranteed. The
appliance switches on in good time and heats the water. The tap
and the mains water supply line are not protected against frost
by the appliance.
www.stiebel-eltron.com FCR 28 | FCR 18 | 15

OPERATION
Settings
4. Settings
5. Cleaning, care and maintenance
Have the electrical safety of the appliance regularly checked
4.1 Temperature
by an electrician.
Appliance type with external temperature selector
Scaling
The temperature can be variably adjusted. In the delivered con-
Almost every type of water will deposit lime at high tempera-
dition, temperature selection is limited. This limitation can be
tures. Limescale will settle inside the appliance and affect its
cancelled by a qualified contractor (see chapter "Installation/
function and service life. The heating elements must there-
Settings").
fore be descaled from time to time. A qualified contractor
You can interrupt the heating process by setting the temperature
who is aware of the local water quality will tell you when the
selector to "cold".
next service is due.
Check the taps/valves regularly. You can remove limescale
deposits at the tap outlets using commercially available des-
caling agents.
Regularly activate the safety valve to prevent it from becom-
ing blocked e.g. by limescale deposits.
6. Troubleshooting
26�02�79�0027
Fault Cause Remedy
• Cold
The water does not heat
There is no power. Check the fuses/MCBs in
I Low temperature setting, 35°C
up.
your fuse box.
II Recommended setting for energy saving,
The temperature is incor-
Check the temperature
low scaling, 60°C
rectly adjusted.
setting.
III Maximum temperature setting, 85°C
The flow rate is low.
The aerator in the taps or
Clean or descale the
shower heads is dirty or
aerator or shower head.
Depending upon the system, the temperatures may vary from
scaled-up.
the set value.
Water drips from the
The valve seat is con-
Depressurise and isolate
safety assembly after
taminated.
the appliance from the
Appliance type with temperature selector inside the control
heating has stopped.
power supply. Request
panel
your qualified contractor
to attend.
The temperature can be freely selected by the qualified contractor
(see chapter "Installation / Settings").
If you cannot remedy the fault, notify your heating contractor. To
Factory setting: 60°C
facilitate and speed up your enquiry, please provide the serial
number from the type plate (no. 000000-0000-000000):
4.2 Rapid heating during dual circuit operation
For appliance types with dual circuit operation, the heating con-
tractor can install a pushbutton to control the rapid heat-up func-
tion remotely. If required, you can switch this on. The rapid heat-
up function switches off when the selected temperature has been
FCR Nr.: 000000 - 0000 - 000000
reached and will not switch on again.
Made in Germany
FCR Nr.: 000000 - 0000 - 000000
Made in Germany
26�02�79�0076
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