STIEBEL ELTRON WWK 221 electronic Bedienung Und Installation Seite 51

oPerATIoN
settings
The period after which the electric emergency/booster heater
provides automatic backup needs to be selected individually by
the user based on local conditions. DHW consumption and the
expected intake temperatures need to be considered.
This function is set in two stages. First enable the function and set
the runtime in the second parameter.
The tHE0 setting disables the "runt-
ime-dependent rapid heat-up" function.
This function is enabled via setting tHE1.
The function is disabled at the factory.
Switch between the tHE0 and tHE1 set-
tings using the "Plus" and "Minus" keys.
The tHE1 setting allows the electric
emergency/booster heater to cut in if
the set temperature is not reached after
expiry of the runtime selected below.
…  Time set for the "Runtime-dependent rapid heat-up"
function
To avoid increased power consumption, only reduce the facto-
ry-set time for runtime-dependent rapid heat-up if necessary. See
chapter "Specification / Appliance parameters".
Set the runtime using the "Plus" and
"Minus" buttons. After the set number of
hours, the appliance checks whether the
set temperature has been reached. If this
is not the case, the appliance switches on
the electric emergency/booster heater.
The factory default is 8 hours.
t
thE0
thE1
tE08
1 "Heat pump" symbol
2 "Electric emergency/booster heater" symbol
tHE0 Runtime-dependent rapid heat-up disabled
tHE1 Runtime-dependent rapid heat-up enabled
tE08 Adjustable number of hours (e.g. 8 in this case) during
which heating is only provided by the heat pump
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… 
You can select whether the temperatures and the volume details
are displayed in SI units or US units. If you select 1, the values are
displayed in degrees Celsius and litres. If you select 0, the values
are displayed in degrees Fahrenheit and gallons.
… 
If the minimum available mixed water volume at the selected set
temperature is insufficient, you can reduce the reheating hyster-
esis by increasing the charge level. This increases the minimum
DHW volume available. The effect equates to a virtual downward
shifting of the temperature sensor. This results in greater DHW
convenience. The efficiency of the appliance is slightly impaired.
DHW heating is started when the available mixed water volume
decreases to the percentage of the maximum mixed water volume
set in the "Charge level" parameter.
Charge level
The displayed mixed water volume is based on a mixed water
temperature of 40 °C. At water temperatures below 40 °C (±1 K),
the mixed water volume is not calculated or displayed.
A further start condition, which overlaps the heat-up level start
conditions, is the reduction of the temperature captured by the
sensor at the cylinder top to 6 K below the active set temperature.
1
2
… 
See chapter "Troubleshooting / Fault codes".
… 
A fault code preceded by E appears if the fault relates to the re-
frigerant circuit. Notify a qualified contractor.
Change units
Press the "Menu" key until "SI" appears
in the display.
Using the "Plus" and "Minus" keys, set
whether the display should use SI units
(1) or US units (0).
Charge level
Press the "Menu" button until an "L"
followed by a number appears on the
display.
You can change the value using the "Plus"
and "Minus" buttons. Setting range: 30
- 100 %
Fault code
If the "Service/fault" symbol is illuminat-
ed or flashes, you can call up the fault
code using the "Menu" button. This menu
remains disabled if no fault has arisen.
E fault code
WWK 221-301 electronic |
Factory setting
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