Appliance Description - STIEBEL ELTRON Accelera 220 E Operation And Installation Manual

OPERATION

Appliance description

11. Booster heater element information label
CAUTION
:
for use only in water
ATTENTION
pour l'utilisation dans l'eau
ATENCIÓN :
se usa sólo para en agua
12. Appliance must be vertical for at least one hour before com-
missioning information label
WARNING / WARNUNG
The unit must remain in vertical position for at least
one hour before putting unit into operation.
Die Anlage muss min. 1 Stunde lang vor deren
Inbetriebnahme in senkrechter Position bleiben.
L'appareil doit être placé en position verticale
au moins une heure avant sa mise en route.
La unidad tiene que quedar en la posición vertical
al menos durante una hora antes de poner la unidad
en funcionamiento.
10 | Accelera® 220-300 E
:
315125-38055
3. Appliance description
The appliance is designed for indoor installation. The appliance
recirculates ambient air and does not require outdoor air. The
appliance extracts heat from the ambient air. This heat is utilized
to heat the water in the DHW tank with added electric power. The
amount of electric energy and time required to heat-up the DHW
depends on the temperature and humidity of the ambient air.
This heat extraction results in a drop in the ambient temperature
inside the installation room by between 2°F/1°C and 5.5°F/3°C.
The appliance also extracts moisture from the air, which turns
into condensate. The condensate is drained from the appliance
via the condensate drain.
When a hot water draw-off point is opened, the hot DHW is pushed
out of the appliance by the in-fl ow of cold DHW.
To protect against corrosion, the inside of the DHW tank is coated
with special enamel and is additionally equipped with an im-
pressed current anode.
The electronic control unit makes energy saving adjustments eas-
ier. Subject to the power supply and usage pattern, the water is
heated up automatically to the set temperature.
Heat pump operating principle
A hermetic circuit within the appliance contains refrigerant (See
15.3, "Data table", pg. 29). This refrigerant evaporates at low
temperatures and collects heat from the ambient air.
In the evaporator, the refrigerant changes from its liquid into its
gaseous state. A compressor draws in the gaseous refrigerant
and compresses it. This increase in pressure raises the refrigerant
temperature.
The compression process requires electrical energy. The energy
(motor heat) is not lost, but is discharged to the downstream
condenser. The cooled refrigerant passes a fi lter dryer. There, the
refrigerant indirectly transfers heat to the DHW tank and the liquid
refrigerant is routed to a two-fl ood evaporator. An expansion valve
then reduces the still prevalent pressure and the cycle starts again.
Note
In the event of an interruption of the power supply, the
compressor is blocked from operating for at least one
minute. The electronic control board (ECB) delays elec-
tronic starting for one minute while the appliance goes
through its initializing process.
If the compressor subsequently fails to start, it may be
blocked by additional safety devices (Klixon and high
pressure switch). If the compressor is switched off due
to the Klixon, the pressure difference between the high
and low pressure sides of the refrigerant circuit may be
the cause. When the pressure difference is equalized
(approximately 5 minutes), the compressor turns on. If a
tripped high pressure switch caused the blocking of the
compressor, this may be due to a failed thermostat or
high ambient air temperature. After the power supply has
been re-established, the appliance continues to operate
with the parameters that were selected before the power
supply was interrupted.
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