STIEBEL ELTRON WWK 223 electronic - Page 10

OPERATION
Settings
10 | WWK 223-303 electronic www.stiebel-eltron.com
Operation with external signal transmitter
!
Material losses
See "Permissible voltage range for external signal trans-
mitters" in the "Specification/data table" chapter.
As standard, the appliances feature the ability to assign a spe-
cific, individual set DHW temperature ("set temperature2") to a
connected external signal transmitter, such as a PV system or a
low tariff transmitter.
This set temperature 2 is activated if the terminal connected to
the external signal transmitter receives a signal (see "Electrical
connection/external signal transmitter connection option" chap-
ter). While activated, set temperature2 replaces the standard set
DHW temperature (set temperature1).
If set temperature2 is activated by the external signal transmitter,
this set temperature will then be active for at least 20minutes.
If the external signal remains active after the 20minutes have
passed, the compressor will run until the external signal drops
out or set temperature2 is reached. Afterwards, the selected set
temperature1 is activated again.
When the relevant DHW set temperature has been reached, the
compressor switches off and remains off for a minimum idle time
of 20minutes.
The following diagram illustrates the connections by means of a
sample signal sequence from an external signal transmitter.
Example:
Water temperature °C 55
Set temperature 1 °C 50
Set temperature 2 °C 65
A
1
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 t [min]
B
1
1
0 2
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 t [min]
D0000034613
A External signal
B Compressor
1 20 min. minimum runtime, set temperature2
2 20 min. minimum compressor idle time
Note
An external signal must be present for at least 60sec-
onds before the control unit responds to it. This will for
example prevent a brief burst of sunshine from triggering
a heat-up process, which due to a lack of further insola-
tion can then not be supplied with PV power generated
on site.
 Fan speed
The current set fan output appears, iden-
tified by a preceding F.
Note
This parameter cannot be changed on this appliance.
 "Air intake temperature" display
An "A" appears as the intake temperature
symbol.
The current air intake temperature is
displayed.
The air intake temperature is only dis-
played while the appliance fan is run-
ning. If it is not possible to establish an
air intake temperature, two dashes are
shown.
 Enabilng the "runtime-dependent rapid heat-up" function
Note
Only use runtime-dependent rapid heat-up if necessary
and only at low intake temperatures. Avoid using runt-
ime-dependent rapid heat-up at intake temperatures for
which heating without the electric emergency/booster
heater normally covers the prevailing demand. In such
cases, selecting too short a runtime leads to unnecessary
electricity bills.
To prevent excessive power consumption, disable the
function in summer and in spring/autumn if at all pos-
sible.
For improved comfort, the appliance offers runtime-dependent
rapid heat-up. If the selected set temperature is not reached by the
heat pump after a user-defined period, the appliance switches on
the electric emergency/booster heater in parallel to back up the
heat pump (subject to this function being enabled). Once the set
value has been reached, the electric emergency/booster heater
remains inactive until the set time has elapsed again following a
heat demand. As a factory default, this function is disabled.
In the case of outdoor installation, we recommend activating the
"runtime-dependent rapid heat-up" function during the winter
months and as required in spring/autumn when outside temper-
atures are low. This prevents any loss of comfort if, for example,
the heat pump heating output falls as a result of the outside tem-
perature dropping, and the heat-up time is therefore longer.
The period after which the electric emergency/booster heater
provides automatic back-up needs to be selected individually by
the user based on local conditions. DHW consumption and the
expected intake temperatures need to be considered.