1 Safety
1.1 Correct use
This device is exclusively designed for heating water heating. Any
other or additional use is inappropriate, in particular the heating
of alternative media. The correct use also includes the observation
of the operating and installation instructions. Only use the device
for the purpose stated by the manufacturer and never change or
convert the device in any way!
1.2 Safety instructions
Observe the following safety information and instructions.
The electrical installation and installation of the refrigerant circuit
must only be carried out by a recognised, qualified contractor or
by qualified Stiebel Eltron customer service engineers.
The recognised contractor is responsible for adherence to
all currently applicable instructions during installation and
commissioning.
Operate this device only if it is fully installed and all safety
equipment is fitted.
!
Danger to life through electrocution!
Never spray the device with water or other liquids.
!
Risk of damage!
Prior to maintenance work, isolate the device from its
power supply.
Where children or persons with limited physical, sensory or mental
capabilities are to be allowed to control this equipment ensure
that this will only happen under supervision or after appropriate
instructions by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the
equipment.
1.3 CE designation
The CE designation shows that the device meets all the essential
requirements:
— Electrical Compatibility Directive (2004/108/EC)
— Low Voltage Directive (2006/95/EC)
— Pressure Equipment Directive (97/23/EC)
The rating plate is located at the back of the heat pump.
2 Device description
2.1 Operational characteristics
The WPF is a heating heat pump designed as brine/water heat
pump. The heat pump extracts energy from the heat source
medium, i.e. brine, at a low temperature level. This extracted
energy is then transferred to the heating water at a higher
level, enriched with the energy drawn by the compressor.
Subject to the heat source temperature, the heating water can be
heated up to a flow temperature of 60 °C.
A modular operation is possible with the WPF.
2.2 Function
The heat source medium (brine) enters the heat pump evaporator.
There, heat is extracted from the medium, so it exits the heat
pump at a lower temperature.
The energy made useful through the heat pump is transferred to
the heating water inside the condenser.
Then, the heating water transfers its energy to the heating
circuit.
3 Control
The heat pump is exclusively controlled by the heat pump manager
WPM II. Therefore, observe the instructions in the chapter Operation
in the operating and installation instructions of the heat pump
manager WPM II.
4 Maintenance and care
!
Risk of damage!
Maintenance work, such as checking the electrical
safety, must only be carried out by a qualified
electrician. Protect the equipment from dust and dirt
ingress during building work.
A damp cloth is sufficient for cleaning all plastic and sheet steel
parts. Do not use abrasive or corrosive cleaning agents!
!
Risk of damage!
Check the refrigerant circuit of the heat pump annually
for tightness in accordance with EU Directive 842/2006.
5 What to do if...
. . . there is no hot water or the heating system remains cold:
Check the fuse/circuit breaker in your fuse box. If it has blown/
tripped, replace/reset the fuse/MCB. Notify your local contractor
if the fuse/MCB blows/trips again.
Notify your local contractor in case of all other faults.
OPERATION
SAFETY | DEVICE DESCRIPTION | CONTROL | MAINTENANCE AND CARE
www.stiebel-eltron.com WPF 20/27/40/52/66 | 3www.stiebel-eltron.com WPF 20/27/40/52/66 | 3
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