Operation; Description; The Main Information In Brief - STIEBEL ELTRON FFB 1 SL Electronic Comfort Bedienungs Und Installationsanleitung Handbuch

1. Operation

for the user and qualified installer

1.1 Description

FFB 1 SL and FFB 2 SL allow remote control
of the DHE .. SL (i) electronic comfort instan-
taneous water heater via a line-of-sight radio
link. The instantaneous water heater can be
operated both from the remote control and
from the control unit on the heater and data
can be transmitted in both directions (see also
1.2 Operation).
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Radio remote control unit 
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Wall mount with adhesive pad 
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Transceiver module 
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Radio remote control 
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Wall mount with adhesive pad 
The FFB 2 SL only works in conjunction with
the transceiver module belonging to the
FFB 1 SL
The remote control unit is watertight (IPX7)
and can therefore even be used while taking a
shower or bath. It has a range of approximate-
ly 25 m within the building.
In addition to the remote control unit belon-
ging to the ))%  6/, another 5 ))%  6/
radio remote control units can communicate
with the transceiver module in the instantane-
ous water heater.

The main information in brief

Temperature selection – between
20 °C and 60 °C in increments
of 0.5 °C
0
Memory push-buttons – 2 reference
temperatures can be stored and
0
called up by the user
Battery change recommended
1.2 Operation
The radio remote control unit is normally
in power save mode (display switched off).
Briefly pressing any button (7) activates the
control unit; the backlighting comes on imme-
diately and the display appears after approx.
3 seconds. Whenever a button is pressed the
lighting comes on for 8 seconds. If no other
button is pressed within 30 seconds the unit
automatically switches back to power save
mode.
1.2.1 Dynamic anti-scald
protection
To reduce the risk of scalding, the radio re-
mote control is fitted with dynamic anti-scald
protection.
Function
The first control unit that is activated (the radio
remote control unit or the control unit on the
heater) is given priority for the next tap pro-
cedure, i.e. the selected temperature can be
lowered or increased to a maximum of 43 °C
from other control units.
Activation
To activate the dynamic anti-scald protection,
either a temperature must be selected by
activating a control on the DHE...SL (i) for the
particular water tap, or a temperature must
be selected on a radio remote control unit by
pressing any button to "wake up" the unit. The
remote control unit display then shows the set
temperature selected, which can still be adjus-
ted if required.
If a tap procedure is started within the next 2
minutes, the dynamic anti-scald protection is
retained while the tap is running and for up to
2 minutes after it has stopped.
1.2.2 Important information
• There is a risk of scalding at outlet
temperatures in excess of 43 °C!
• If children or people with restricted phy-
sical, sensory or mental capacities use the
heater, make sure that they only do so under
supervision or after appropriate instruction
by a person who is responsible for their
safety.
Children should be supervised to ensure that
they do not play with the heater.
Risk of scalding!
If it cannot be avoided, we recommend per-
manently limiting the temperature with the
"Child safety control" (see comfort functions
setting). Further "anti-scald protection" can
be activated by the qualified installer (in ser-
vice mode on the DHE...SL (i) control unit).
All information in these operating and instal-
lation instructions must be followed carefully.
They contain important information regarding
the safety and operation of the radio remote
control system.
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1.2.3 Battery change
The radio remote control unit is powered by
2 lithium cells (type CR123A). When the
symbol appears on the display a battery chan-
ge is recommended. Otherwise change the
batteries when the display becomes weaker or
is no longer visible.
Always take out used batteries. No
liability can be accepted for damage
caused by dead batteries!
To change the batteries, unscrew the back of
the casing (5) and replace both batteries (8).
Note the correct position of the battery poles.
Always use the same type of battery and re-
place them in pairs.
Batteries must not be disposed of
with domestic rubbish. Used
batteries must be taken back to the shop or a
collection point for special substances!
When replacing the back of the casing, make
sure that the seal (9) is placed correctly in the
front of the casing (4) so that the control unit
remains sealed.
1.2.4 Information on the line-of-
sight radio link
Special conditions in buildings may
weaken the propagation of the radio
waves. In these cases the range of the remo-
te control may be reduced. If the FFB..SL
cannot establish a connection with the hea-
ter, "CON" will appear on the display.
Because the 868 MHz frequency range used
is also freely available for other applications
(radio controlled thermostats, weather stations
with radio transmission, radio head-sets, etc.),
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