STIEBEL ELTRON WWK 300 A - 2.4 Power Supply; 2.5 Commissioning; 2.6 Safety Equipment and Maintenance

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2.4 Power supply
Only qualified electricians must carry out
the installation in accordance with these
instructions.
!
Please note: Before any work,
isolate the equipment from the
power supply at the control panel.
Observe VDE 0100 [or local regulations]
and the regulations of your local power
supply utility.
The appliance is intended to be
permanently connected to fixed wiring.
For the connection to the power supply
the fitted supply cord has to be used.
(Fig.3, pos.2)
The DHW heat pump must be able to
be separated from the mains power
supply by an additional isolator, which
disconnects all poles with at least 3mm
contact separation. For this purpose, use
contactors, mains isolators, fuses, etc. on
site.
Terminals are located inside the control
panel and become accessible by removing
the equipment lid and the cover of the
wiring chamber).
2.5 Commissioning
Only approved contractors may
commission this equipment and instruct
the owner in its use.
Commissioning
— Fill, vent and thoroughly flush the
device.
— Check the safety assembly.
Inform the user that water may drip
from the safety valve whilst the water
is being heated up.
— Switch ON the power supply
Note:
— Never operate the equipment outside
the temperature range 0°C to + 42°C.
At temperatures below - 10°C (e.g. trans-
port/storage), the safety temperature cut-
out may respond. Press the reset button
after the temperature is much higher than
-10°C (Fig. 3, pos. 10).
2.6 Safety equipment and main-
tenance
Only qualified contractors must carry out
the installation in accordance with these
instructions.
On the equipment
In case of a fault, the safety equipment
of the WWK 300 interrupts the relevant
power circuit.
!
Please note: Before any work on
the equipment, disconnect all
poles from the mains.
High limit safety cut-out (STB) electric
booster heater
Equipment with electric booster heater
is stopped if the DHW temperature
exceeds95°C.
When the source of the fault has been
removed, reset the high limit safety cut-
out by pressing the reset button (Fig. 3,
pos.10). The heat pump top cover should
be opened for access to this device as
shown in Fig.3.
Safety high pressure limiter (SDBK)
The safety high pressure limiter shuts
down the compressor, if the pressure
inside the refrigerant circuit exceeds the
permissible maximum value. The safety
high pressure limiter may also respond,
if the appliance is operated above its
permissible limit (>42°C air temperature)
or the control thermostat of the heat
pump fails to respond. Reset the high
pressure limit safety cut-out by pressing
the reset button (Fig.3, pos.14), after the
cause of the fault has been removed.
Protective motor thermoswitch
The protective motor switch will shut
down the compressor, if it is overloaded
because of excessive thermal load.
Remove the relevant fault. After a
short cool-down phase, the protective
motor switch restarts the compressor
automatically.