iNSTALLATiON
Preparation
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Observe the structural limits of the T-support used.
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See the dimensioned connection drawing for the correct
spacing between holes (see chapter "Specification / Dimen-
sions and connections").
9.6.4 Wall mounting support WK 2
Note
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Install a ribbon heater when mounting on the wall
bracket or T-support (see chapter "Electrical connec-
tion / Ribbon heater").
Note
To prevent disturbance due to structure-borne noise
transmission, never install the wall mounting bracket on
the external walls of living areas or bedrooms.
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Install the wall mounting bracket on a garage wall,
for example.
≥300
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2
3
5
6
4
D
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9
1 Heating flow
2 Heating return
3 Condensate drain
4 Ribbon heater
5 Condensate drain conduit
6 Wall mounting bracket
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Observe the structural limits of the wall mounting bracket
used.
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See the dimensioned connection drawing for the correct
spacing between holes (see chapter "Specification / Dimen-
sions and connections").
9.7 WPM heat pump manager
A WPM heat pump manager is required to operate the appliance.
This controls the entire heating system.
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Observe the WPM installation instructions during installation.
9.8 Buffer cylinders
!
Material losses
A buffer cylinder with diffusion-proof insulation is essen-
tial to enable cooling by means of fan convectors.
Note
If cooling is provided via an area heating system, the
buffer cylinder is not required.
We recommend the use of a buffer cylinder to ensure trouble-free
appliance operation.
The buffer cylinder provides hydraulic separation of the volume
flows in the heat pump circuit and heating circuit, and also serves
as an energy source for defrosting.
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When operating without a buffer cylinder, observe the details
specified in the chapter “Commissioning / Checking the flow
rate”.
9.9 Preparing the electrical installation
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3 mm contact separation.
This requirement can be met by contactors, isolators,
fuses, etc.
Material losses
The specified voltage must match the mains power sup-
ply. Observe the type plate.
Material losses
Provide separate fuses/MCBs for the three power circuits,
i.e. those of the appliance, the control unit and the elec-
tric emergency/booster heater.
Note
The appliance includes an inverter for the variable speed
compressor. In the event of an error, inverters can cause
DC residual currents. If RCDs are provided, they must be
type B AC/DC-sensitive.
A DC residual current can block type A RCDs.
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Ensure that the appliance power supply is discon-
nected from the distribution board.
The electrical data can be found in the chapter "Specification".
You require a screened J-Y (St) 2x2x0.8 mm² cable as a bus cable.
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Use cables with the relevant cross-sections. Observe the ap-
plicable national and regional regulations.
