STIEBEL ELTRON WPL-A 05 HK 230 Premium, Эксплуатация и установка

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OPErATiON
Appliance description
www.stiebel-eltron.com WPL-A Premium | 5
3. Appliance description
3.1 Minimum software versions
The following minimum software versions are necessary for op-
eration of the heat pump:
- WPM: 449.05
- FES: 502.03
3.2 Properties
This appliance is an air source heat pump designed for outdoor
installation. Heat is extracted from the outdoor air at a low tem-
perature level, and is then transferred to the heating water at a
higher temperature. The heating water can be heated to a flow
temperature of up to 75 °C.
The appliance is equipped with an electric emergency/booster
heater (NHZ). To safeguard heating operation and the provision
of high DHW temperatures, the electric emergency/booster heat-
er is activated as an emergency heater if the dual mode point is
undershot in mono mode operation. If the same thing happens in
mono energetic operation, the electric emergency/booster heater
is activated as a booster heater.
This appliance has further operational characteristics:
- Suitable for underfloor and radiator heating systems.
- It will continue to extract heat from outdoor air even at an
outside temperature of -25 °C.
- Corrosion-protected, external casing made from hot-dipped
galvanised sheet steel plus stove-enamelled finish.
- Comprises all components and safety equipment required for
operation.
- One element of the safety concept is a safety valve built into
the appliance. In the event of a leak, this safety valve pre-
vents refrigerant from entering the heating circuit.
Note
For centralised control of the heating system, you would
need the WPM heat pump manager.
3.3 Function
3.3.1 Heating
Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side. The evaporated refrigerant is com-
pressed by a compressor. This process requires electrical ener-
gy. At this point, the refrigerant is at a higher temperature level.
A further heat exchanger (condenser) transfers the heat to the
heating circuit. The refrigerant then expands again 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. This hoarfrost is
automatically defrosted. Water created by this defrosting process
collects in the defrost pan and is drained off.
!
Material losses
During 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. For opera-
tion without a buffer cylinder, observe chapter "Menu /
Menu description / SETTINGS / HEATING / STANDARD
SETTING / BUFFER OPERATION" in the WPM installation
instructions. Otherwise the heating water freezes under
unfavourable conditions.
The heat pump automatically reverts to heating mode at the end
of the defrost cycle.
Material losses
In dual mode operation, return water from the second
heat generator may flow through the heat pump. Please
note that the return temperature must be no higher than
65 °C.
3.3.2 Cooling
Material losses
The heat pump is not suitable for continuous, year-round
cooling.
f Observe the application limits (see chapter “Specifi-
cation / Data table”).
Material losses
In cooling mode, condensate can form when the dew
point temperature is undershot.
f
Take suitable measures to prevent the formation of
condensate.
Rooms are cooled by reversing the heat pump circuit. Heat is
extracted from the heating water and the evaporator transfers
this heat to the outdoor air.
Area cooling and fan cooling require the installation of a remote
control unit (FET) in a reference room to capture the relative hu-
midity and the room temperature as part of dew point monitoring.
With fan cooling, it is also necessary to install a buffer cylinder.
Heat pump application limit
The heat pump is switched OFF if the outside temperature falls
below the selected lower application limit for cooling (COOLING
LIMIT parameter).
4. Settings
The system is operated exclusively via the WPM heat pump man-
ager.
f
Please observe the instructions for the heat pump manager.