INSTaLLaTION
Commissioning
46
| WPL 15 IKS | WPL 25 IK
www.stiebel-eltron.com
1
CODE ENTRY
Enter the correct four-digit code to change parameters at control
level 3. The factory-set code is 1 0 0 0.
After pressing the programming key (indicator illuminates), the
first digit can be selected by turning the rotary selector.
Pressing the programming key again confirms the value, then the
second digit of the code begins to flash. The second digit of the
code can then be entered by turning the rotary selector.
When all four digits have been entered correctly, four lines ap-
pear in the display. This enables access to control level 3, and the
display shows CODE OK.
Closing and re-opening the flap requires that the code be entered
again. The code does not need to be entered for checking existing
settings.
2
LANGUAGE
Here you can select the menu language.
f
f
Press the programming key.
f
f
Select a language.
f
f
Confirm with the programming key.
3
CONTRAST
The display contrast can be adjusted here.
f
f
Turn the rotary selector to change the contrast.
4
DISPLAY
Here you can select what will be displayed when the programming
unit flap is closed. The options are:
- Outside temperature
- Return temperature
- Day and time
- DHW temperature
- Mixer temperature
5
EMERG OPERTN
System characteristics in the case of FATAL ERROR in conjunction
with emergency mode. You can switch parameter EMERG OPERTN
on or off.
Emergency mode set to ON
As soon as faults occur and the heat pump fails, the program selec-
tor automatically switches to operating mode EMERG OPERTN.
Emergency operation set to OFF
As soon as faults occur and the heat pump fails, the electric emer-
gency/booster heater takes over the frost protection of the cent-
ral heating system. Users can then independently select EMERG
OPERTN.
6
HEAT-UP PROG
Heat-up program for underfloor heating systems
Use the heat-up program to dry your screed with a defined tem-
perature profile. To prevent damage to the appliance and/or the
installation, observe the following:
Where return temperatures are < 25 °C, the heat-up program /
screed drying must be carried out via the emergency/booster he-
ater. The process must not be carried out via the heat pump – such
low system temperatures during the defrost cycle mean that the
appliance may not be protected from frost during the defrost cycle.
If the return temperature rises > 25 °C the heat pump can take over
screed drying. Set parameter “HEATING LIMIT” to -20 °C.
If you use the heat-up program, input the following settings at
the heat pump manager:
First set parameter “HEATING LIMIT” to 30 °C.
There are a total of 6 parameters that serve to determine the
temperatures and periods for the heat-up program. These 6 pa-
rameters can be adjusted in sequence as soon as the heat-up
program is activated. The program is started with the HEAT-UP
PROG parameter and the setting ON. Please note that depending
on the system temperature it may take some time to reach the
required low end temperature.
The low end temperature (parameter LOW END TEMP) is held for
the selected time (parameter LOW END DURAT). After expiry of
this period, the system uses a fixed increase K/day (parameter
INCREAS/DAY) to heat to the maximum low end temperature (pa-
rameter MAX HEAT-UP T) and holds this maximum temperature
for the selected period (parameter MAX TEMP DURAT). The system
subsequently returns to the low end temperature using the same
steps as for heat-up.
1
7
4
5
3
2
84
�0
3�
01
�0
03
8
6
Y Temperature
X Time
1 Maximum temperature
2 Low end temperature
3 Low end temperature duration
4 Increase K/day
5 Maximum temperature duration
6 Start
7 End
If a heating buffer cylinder has been integrated into the system,
the temperature in the buffer cylinder is controlled solely via the
return sensor (fitted at the base of the buffer cylinder). If only the
direct heating circuit 1 is operational, the set values are reduced
by 5 K to even out temperature differences in the buffer cylinder.
If 2 heating circuits are operational (second heating circuit is for
underfloor heating system), the mixer in heating circuit 2 regulates
down to the selected set values.
During the heat-up program the appliance often reaches maxi-
mum output. For this reason, energy consumption and noise levels
are comparatively high during screed drying.
