OPERATION
Settings
www.stiebel-eltron.com WPL basic | WPL S basic | 5
Further operational characteristics:
- Suitable for underfloor and radiator heating systems
- Still extracts heat from the outdoor air at – 20 °C outside
temperature
- Corrosion-protected, external casing components made from
hot-dipped galvanised sheet steel plus powder-coated finish
- Comprises all components required for operation and all
safety equipment
- Filled with non-combustible safety refrigerant
Note
The heat pump manager is required for control over the
entire heating system.
3.1 Function
Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side. The now evaporated refrigerant is
compressed with one or two compressors. Electrical energy is
necessary for this process. Now, the refrigerant is at a higher
temperature level and transfers the heat drawn from the air via
an additional heat exchanger (condenser) to the heating system.
During this process, the refrigerant expands again, and the cycle
begins again.
At air temperatures below approx. +7 °C, the humidity in the air
condenses as hoarfrost on the evaporator fins. This hoarfrost is
automatically defrosted. Water created from this defrosting col-
lects in the defrost pan and is drained off via a hose.
In the defrost cycle, the fan is switched OFF and the heat pump
circuit is reversed. The heat required for defrosting is drawn from
the buffer cylinder.
The heat pump automatically reverts to heating mode at the end
of the defrost cycle.
4. Settings
The appliance is controlled by means of the WMP II heat pump
manager; no other control unit is required.
Observe the heat pump manager operating and installation
instructions.
5. Maintenance and care
A damp cloth is sufficient for cleaning all plastic and sheet steel
parts. Never use abrasive or corrosive cleaning agents.
Check the condensate drain monthly (visual inspection). Remove
contaminants and blockages immediately.
!
Damage to the appliance and environment
Keep the air discharge and intake apertures free from
snow and leaves.
We recommend an annual inspection (establishing the actual
state) and, if required, maintenance (returning the set state) by a
qualified contractor.
6. Troubleshooting
Fault Cause Remedy
There is no hot
water or the
heating system
stays cold.
There is no voltage at the
appliance.
Check the fuses/MCBs in your
fuse box/distribution panel.
If required, reset the MCBs. If
the MCBs trip again after being
reset, notify your contractor.
Water is leaking
from the appli-
ance.
The condensate drain
may be blocked.
Clean the condensate drain as
described in chapter ‚Care and
maintenance‘.
Indoor installa-
tion: Condensate
is collecting on
the outside of the
appliance or the
air hoses.
The drying out phase of
the building is not yet
complete.
If the room is sufficiently well
ventilated or dehumidified,
this condensate should no
longer form on the appliance ap-
prox.two years after the house
was built.
The humidity in the air is
relatively high (≥60%).
When the weather conditions
change, condensation should no
longer form on the appliance.
The appliance is located
in a moisture-prone
area. Moisture-prone
areas are rooms where
the humidity in the air is
high due to the drying of
laundry, for exam
ple.
Make sure that the room is
adequately ventilated and dehu-
midified. If necessary, hang your
laundry up in a different room.
Use a vented tumble dryer.
Please note that condenser
tumble dryers do not reduce the
humidity in the air.
The air hoses are incor-
rectly fitted or sealed.
Cold air escapes.
Check whether the air hoses are
correctly fitted and sealed. If
necessary, call your contractor.
Outdoor installa-
tion: Condensate
is collecting on
the outside of the
appliance.
The heat pump is
drawing heat from the
outdoor air to heat the
building. This can cause
the humidity in the out-
door air to accumulate
as dew or frost on the
cooled heat pump casing.
This is not a defect.
Note
Even when the condensate is draining away correctly,
expect water to drip from the appliance onto the floor.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate.
Sample type plate
Montageanweisung beachten! Dichtheit geprüft!
Made in Germany
*xxxxxxxxxxxxxxxxxx*
26�03�01�1736
1
1 Number on the type plate
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