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Idiomas disponibles
Idiomas disponibles
1. Operating instructions
1.1 Description
FFB 1 and FFB 2 enable the radio remote con-
trol (433 Mhz) of the Stiebel Eltron DHE .. SL
electronic comfort and DHE electronic com-
fort instantaneous water heaters.
FFB 1
• Radio control unit
( 1 )
• Wall bracket with fixings
( 2 )
• Receiving module
( 3 )
FFB 2
• Radio control unit
( 1 )
• Wall bracket with fixings
( 2 )
The FFB 2 operates only in combination with
the receiving module of the FFB 1.
Following installation of the FFB 1, the DHE
(instantaneous water heater) can be adjusted
using the radio remote control or it can be ad-
justed directly at the control section of the unit.
The radio control unit is waterproof (IPX7)
and therefore can also be used when taking a
shower or bath. The operating range of the radio
control unit is approximately 25 m within a
building. In addition to the FFB 1 radio control
unit, up to 5 further FFB 2 radio control units
can communicate with the receiving module in
the DHE.
The most important points
in brief
electronic comfort
Temperature selection – adjus-
table between 30 °C and 60 °C in
0.5 °C steps
Memory push buttons – Storage
and recall of 2 setpoint tempera-
tures by the user
Changing the batteries
Because each radio control unit has an indivi-
dual sender code, an FFB 2 must first be re-
gistered with the receiving module (see "First
start-up - FFB 2").
In the case of the FFB 1, the sender code of the
radio control unit is pre-registered at the factory.
6
for the user and the professional
1.2 Operation
The radio control unit is normally in energy
saving mode (display switched off). The control
unit is activated by briefly pressing any push-
button (7). If a push-button is not operated
within 20 seconds in the activated mode, the
control unit automatically switches back to en-
ergy saving mode.
If the control unit is activated using the
push-button, the setpoint which was last
set is indicated and transmitted to the DHE. A
change to the setpoint tempe rature can subse-
quently be made by single presses on the
push-buttons in 0.5 °C steps, or by holding
the push-buttons down for rapid forward or
reverse mode (scrolling).
Activation by pressing the
push-buttons causes the corresponding stored
value to be displayed and transmitted. This
enables the simple and rapid selection of a fre-
quently used setpoint temperature.
Each operation of a push-button is confirmed
on release of the push-button by an acoustic
signal (bleep) from the receiving module built
into the DHE. This signal can be deactivated by
a qualified installer if the customer so wishes.
1.2.1 Memory push-button settings
To change the settings of the memory push-
buttons, the desired setpoint should be adjus-
ted in the display (6), and the corresponding
memory push-button should then be pressed
for approximately 3 seconds. A short fade-out
of the display confirms that the temperature
has been stored.
Where several radio control units are used,
each radio control unit has two storage loca-
tions of its own. This means that the
push-buttons can be adjusted totally individually
on each radio control unit and in the DHE.
1.2.2 Anti-scald protection
When using more than one radio-remote con-
trol unit the priority of temperature selection is
given to the unit that first sends the signal. This
priority lasts during the water flow and for 2 mi-
nutes after the water outlet has been switched
off. The priority is de-activated automatically.
During the time in which the priority setting is
activated it is only possible to reduce the water
temperature setting. If the set temperature is
at 43 ºC or less the Anti-scald protection is
activated, this means that it is impossible for
any radio-remote control unit to increase the
tempera ture above 43 ºC during the duration
of water flow.
Although the display on the control unit and the
DHE will show the selected higher temperature,
the water temperature will be limited to maxi-
mum of 43 ºC.
Simultaneous use of the different
radio-remote controls can mean that
the actual temperature shown on the dis-
plays is different to the actual water tempe-
rature. Only the priority unit will show the
actual temperature.
Water temperatures above 43 ºC can
cause scalding.
1.2.3 Operation of the appliance
DHE .. SL electronic comfort
Operation of the instantaneous water heater
is also possible in the usual way , the internal
control-part is completly integrated into the
dynamic scald-protection.
or
DHE electronic comfort
Operation of the instantaneous water heater
is also possible in the usual way. Operation
via the radio link does however always have
priority.
If a setpoint adjustment is made by radio con-
trol, the internal operating device is blocked
during the current drawing off of water. Two
memory
minutes after drawing off has finished, the DHE
operating device is auto ma tically released once
again.
If a temperature is set at the DHE operating
device for drawing off water and an adjust-
ment by the radio link is to be prevented, the
temperature adjustment knob on the DHE
should be pressed before drawing off. Five
minutes after drawing off has been com pleted,
this block is automatically lifted (by pressing
the adjustment knob again the block can also
be lifted at an earlier point in time).
1.2.4 Changing the batteries
The radio control unit is supplied by 2 lithium
cells (construction type CR2032 or CR2025).
If a change of batteries is required, the
symbol appears in the display.
Used batteries must be removed. We
cannot be made responsable for da-
mages caused by leaked batteries!
To change the batteries, the lower section of
the casing (5) should be unscrewed and both
batteries in the battery holders (8) replaced.
Pay attention to the correct polarity of the
batteries ( + towards the top). Always use the
same type of batteries and change in pairs.
During changing of the batteries, the stored
values for the
maintained.
Batteries should be recycled!
When fitting the lower section of the casing,
care should be taken to ensure that the seal
(9) is correctly seated in the upper section of
the casing (4), so that the water-tightness of
the control unit remains guaranteed.
1.2.5 Guidance on the radio link
Special conditions in buildings can lead
to a reduction in the signal strength of
radio waves. The operational range of the re-
mote control can be reduced in such cases.
Since the employed frequency range of 433 MHz
is also freely available for other applications (radio
controlled thermostats, weather stations with
radio links, radio controlled headphones etc.),
a disturbance in the radio link to the DHE may
occur in the event of simultaneous transmission.
push-buttons are
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