STIEBEL ELTRON WWK 223 electronic - Quick Heat-Up Key

OPERATION
Settings
12 | WWK 223-303 electronic www.stiebel-eltron.com
4.4 "Quick heat-up" key
Note
To start rapid/comfort heating with the "Rapid heat-up"
key, the start screen must be displayed.
Press the "Rapid heat-up" key for two
seconds.
The "heat pump" and "electric emergen-
cy/booster heater" symbols appear.
4.4.1 Quick/comfort heat-up
Normally, the "Rapid heat-up" key is used to enable rapid/comfort
heating, which lets you cover an unexpectedly high DHW demand
without changing any of the appliance's standard settings.
If quick/comfort heat-up is activated manually by pressing the
relevant key, the heat pump and the electric emergency/booster
heater will start in parallel, irrespective of the selected set tem-
perature, and will remain active until the DHW temperature in the
cylinder has reached 65°C.
If the water temperature in the upper cylinder section rises by a
hysteresis value above the set temperature on the cylinder top
sensor, the electric emergency/booster heater is switched off.
The electric emergency/booster heater remains in standby mode
until the set temperature has been reached throughout the DHW
cylinder. A flashing "electric emergency/booster heater" symbol
indicates that the electric emergency/booster heater is in standby
mode.
The rapid/comfort heating function remains active until a temper-
ature of 65°C has been achieved throughout the DHW cylinder
(comfort heating). The appliance then automatically switches back
to the previously set parameters.
Note
The "electric emergency/booster heater" and "heat pump"
symbols are displayed until the rapid/comfort heating
terminates.
Note
To end rapid/comfort heating, press the "Rapid heat-up"
key for two seconds.
4.4.2 Emergency mode
If the appliance is faulty, you can use the emergency mode to
activate the electric emergency/booster heater.
Following a DHW demand, the appliance checks the temperature
increase every 15 minutes. If the temperature increase is <0.25°C
during each measurement interval until the end of the maximum
temperature increase time (see "Specification" chapter), the ap-
pliance switches off the compressor.
The "service/fault" symbol flashes on the display and a fault code
indicates that the appliance is not heating.
Press the "Rapid heat-up" key for two
seconds.
The “electrical emergency/booster heat-
er” symbol appears. Service/fault symbol
flashes.
After the "Quick heat-up" key has been pressed, the indicated fault
code increments by a value of 256, as the fault codes are added
together (see fault code table in the "Troubleshooting" chapter).
"Service/fault" symbol continues flashing. The electric emergency/
booster heater is activated.
The current set temperature (set temperature1 or set temper-
ature2) is ignored. In emergency heating mode, the appliance
operates with a fixed set temperature. In the upper cylinder sec-
tion, the DHW is heated up to 65°C by the electric emergency/
booster heater.
Following one-time enabling of this function by means of the
"Quick heat-up" key, this function remains enabled for 7days.
Following 7days of emergency operation the electric emergency/
booster heater is disabled. The fault code shown on the display
decrements by256.
If you press the "Rapid heat-up" key again for two seconds within
the 7days of emergency heating mode, the 7-day runtime for
emergency heating mode will restart.
If the 7-day runtime for emergency heating mode has expired,
you can restart emergency heating mode for a further 7days by
pressing "Rapid heat-up".
Pressing the "Rapid heat-up" button only enables emergency
heating mode if a fault with fault code8 had previously occurred.
In standard mode pressing the "Quick heat-up" key only triggers
one-time heat-up of the DHW cylinder.
Emergency mode is disabled by an interruption of the power sup-
ply. The appliance tries again to heat with the heat pump. You
can avoid having to wait until the temperature increase time has
elapsed (see "Specification" chapter) by starting manual emer-
gency heating mode.