OPERATION
Safety
www.stiebel-eltron.com WPL 33 | 5
2. Safety
2.1 Intended use
The appliance is intended to heat buildings and domestic hot
water. The appliance is designed for extracting energy from the
air and utilising this energy in water-based heating systems within
the stated operating temperature ranges.
This appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in a non-do-
mestic environment, e.g.in a small business, as long as it is used
in the same way.
Any other use beyond that described shall be deemed inappropri-
ate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
2.2 General safety instructions
Observe the following safety instructions and regulations.
- The electrical installation and installation of the heating cir-
cuit must only be carried out by a recognised, qualified con-
tractor or by our customer support engineers.
- The qualified contractor is responsible for adherence to
all currently applicable regulations during installation and
commissioning.
- Operate the appliance only when fully installed and with all
safety equipment fitted.
- Protect the appliance from dust and dirt ingress during
building work.
!
WARNING Injury
The appliance may be used by children aged 8 and older
and persons with reduced physical, sensory or mental
capabilities or a lack of experience and know-how, pro-
vided that they are supervised or they have been in-
structed on how to use the appliance safely and have
understood the resulting risks. Children must never play
with the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they are
supervised.
2.3 Test symbols
See type plate on the appliance.
3. Appliance description
The appliance is an air|water heat pump that operates as a heat-
ing heat pump. Heat is extracted from the outdoor air at a low
temperature level, and is then transferred to the heating water at
a higher temperature. The heating water can be heated up to a
flow temperature of 60°C.
The appliance is equipped with an electric emergency/booster
heater (DHC). If the dual mode point is undershot in mono mode
operation, the electric emergency/booster heater is activated to
safeguard heating operation and the provision of high DHW tem-
peratures. In such a case in mono energetic operation, the electric
emergency/booster heater is activated as a booster heater.
Operational characteristics:
- Suitable for underfloor and radiator heating
- Still extracts heat from the outdoor air at - 20 °C outside
temperature.
- Corrosion-protected, external casing made from zinc-plated
sheet steel plus powder-coated finish.
- Comprises all components and safety equipment required for
operation.
- Filled with non-combustible safety refrigerant.
Note
To control the heating system, you will need the heat
pump manager WPM.
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. This process requires
electrical energy. The refrigerant is then at a higher temperature
level and transfers the heat drawn from the air to the heating
system via an additional heat exchanger (condenser). During this
process, the refrigerant expands, and the cycle restarts from the
beginning.
At air temperatures below approx. + 7 °C, the humidity in the air
condenses as hoarfrost on the evaporator fins. Any hoarfrost is au-
tomatically defrosted. Water created from this defrosting process
collects 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 the heat pump manager WPM and
does not require any special operator actions.
Please observe the heat pump manager operating and instal-
lation instructions.
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