OPERATION
Appliance description
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WPL ICS classic | WPL IKCS classic |
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3. Appliance description
The appliance is an air | water heat pump that oper-
ates as a heating heat pump. The appliance extracts heat
from the outdoor air at a low temperature level and trans-
fers it to the heating water at a higher temperature level.
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). 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 happens in
mono energetic operation, the electric emergency/booster heater
is activated as a booster heater.
Additional features
- Suitable for underfloor and radiator heating systems
- Preferred for low temperature heating systems
- Still extracts heat from the outdoor air at –20 °C outside
temperature
- Corrosion-protected, external casing made from hot-dipped
galvanised sheet steel plus stove-enamelled finish
- Comprises all components and safety equipment required for
operation
- Filled with non-combustible safety refrigerant
3.1 Function
3.1.1 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 process collects in
the defrost pan and is drained off via a hose.
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Material losses
During the defrost cycle, the fan is switched off and the
heat pump circuit is reversed. The heat required for de-
frosting is drawn from the buffer cylinder. For operation
without a buffer cylinder, observe chapter "Menu / Menu
description / SETTINGS / HEATING / STANDARD SETTING /
BUFFER OPERATION" in the WPM installation instructions.
This prevents damage to the heat pump as a result of
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
60 °C.
3.1.2 Cooling
!
Material losses
The heat pump is not suitable for continuous, year-round
cooling.
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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.
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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. The evaporator transfers this
heat to the outdoor air.
Area cooling and fan cooling require the installation of the FET
remote control unit 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 (LIMIT COOL-
ING parameter).
4. Settings
The system is operated exclusively via the WPM heat pump man-
ager.
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Observe the heat pump manager operating and commission-
ing instructions.
5. Maintenance and care
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Material losses
Maintenance work, such as checking the electrical safety,
must only be carried out by a qualified contractor.
!
Material losses
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Keep the air discharge and intake apertures free
from snow and leaves.
A damp cloth is sufficient for cleaning all plastic and sheet metal
parts. Never use abrasive or corrosive cleaning agents.
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Protect the appliance from dust and dirt during building
work.
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Once a month, check that the condensate drain is work-
ing correctly (visual inspection). When doing so, check for
water collecting below or next to the appliance. See chapter
"Troubleshooting".
We recommend a regular inspection (to establish the current con-
dition of the system), and maintenance by a qualified contractor if
required (to return the system to its original condition).
