STIEBEL ELTRON WWK 220 electronic - Appliance Operation Outside the Application Limits; Frost Protection; 4 Settings; Display and Controls

OPERATION
Settings
ENGLISH
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WWK300electronicSOL: Connection of an external heat
generator
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Material losses
Even if an external heat generator is connected, do not
disconnect the appliance from the power supply as oth-
erwise it is not protected against frost and corrosion. The
power supply must not be interrupted even in winter,
when it is possible that DHW heating is only being pro-
vided via the external heat generator.
The appliance is equipped with an integral smooth tube heat ex-
changer to which an external heat generator can be connected
(e.g. a solar thermal system or central heating system). The DHW
cylinder has sensor wells available for this in various positions.
Once during commissioning, the qualified contractor must match
the controls between the appliance and the external heat gen-
erator.
3.2 Appliance operation outside the application
limits
3.2.1 Ambient temperatures below the application limit
At temperatures below the lower application limit hoar frost may
form on the evaporator depending on the air humidity and water
temperature. If hoar frost forms on the evaporator, the hoar frost
temperature monitor switches the heat pump compressor off. The
compressor switches on automatically once the evaporator has
defrosted.
 To guarantee fault-free operation of the appliance, make sure
you operate the appliance within its application limits (see
chapter "Specification/ Data table").
Note
Heat-up times are longer while the evaporator is defrost-
ing.
3.2.2 Ambient temperatures above the application limit
The safety equipment switches the appliance off if the upper ap-
plication limit is exceeded. Following a cooling time of several
minutes the appliance is switched back on automatically. The
appliance is switched off again if the ambient temperature rises
above the permissible temperature value again.
 To guarantee fault-free operation of the appliance, make sure
you operate the appliance within its application limits (see
chapter "Specification/ Data table").
3.3 Frost protection
The appliance activates the frost protection function if the integral
sensor in the DHW cylinder captures a temperature below 10°C.
The appliance then heats the water by means of the heat pump
and the electric emergency/booster heater. The heat pump and
electric emergency/booster heater switch off when the tempera-
ture captured by the integral sensor reaches 18°C.
4. Settings
4.1 Display and controls
Note
15seconds after every adjustment, the appliance au-
tomatically reverts to the standard display (amount of
mixed water) and saves the set value.
elctronic comfort
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1 Set temperature symbol
2 Amount of amount of mixed waterdisplay (l|40°C)/
Actual temperature display, upper cylinder section/
Set temperature1display
Display, set temperature 2 /
Fault code display
3 Plus key
4 Minus key
5 Service/fault symbol
6 Electric emergency/booster heater symbol
7 Heat pump symbol
8 Rapid heating key
9 Set temperature2 symbol
10 Menu key
11 Amount of amount of mixed watersymbol
12 Actual temperature symbol
The "electric emergency/booster heater" and "heat pump" sym-
bols are displayed when there is a demand for these appliance
components. The display of these symbols does not necessarily
mean that the electric emergency/booster heater and the heat
pump are running.
Example: The appliance is in rapid/comfort heating mode. The
electric emergency/booster heater switches off when the temper-
ature in the upper cylinder section has reached 65°C. The heat
pump has not yet heated the lower section to 65°C and the rapid/
comfort heating function has therefore not been terminated yet.
The electric emergency/booster heater symbol is displayed until
the rapid/comfort heating function has been terminated.
314104-38523-9034_WWK_220-300_electronic_en_pl.indb 7 24.02.2015 10:33:23