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CONTENTS
Installation
sion on steel components such as internal cylinders, steel heating
elements or steel pipes.
The products of corrosion, e.g. rusty sludge, can settle inside the
heat pump condenser and reduce the cross-section, resulting in a
lower output or in the high pressure switch triggering a shutdown.
11.7 Filling the heating system
The system pressure can be read on the programming unit display.
For this, connect the control voltage (see chapter "Power supply
/ Control voltage"). Alternatively you can install a pressure gauge
on site.
1
D0000037501
1 Drain, heating side
Fill the heating system via the drain.
Water quality
A fill water analysis must be carried out before the system is
filled. This may, for example, be requested from the relevant water
supply utility.
!
Material losses
To avoid damage as a result of scaling, it may be neces-
sary to soften or desalinate the fill water. The fill water
limits specified in chapter "Specification / Data table"
must always be observed.
Recheck these limits 8-12 weeks after commission-
ing and as part of the annual system maintenance.
Note
With a conductivity >1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
Suitable appliances for water softening and desalinating,
as well as for charging and flushing heating systems, can
be obtained via trade suppliers.
Note
If you treat the fill water with inhibitors or additives, the
same limits as for desalination apply.
11.8 Venting the heating system
Prior to venting the heating system, open the quick-action air vent
valve in the multi function assembly (MFG).
The multi function assembly is located behind the control panel.
1.
2.
D0000037538
Remove the screws on the control panel.
Pivot the control panel to the side.
1
2
D0000037502
1 Quick-action air vent valve
2 PCB
Open the quick-action air vent valve.
!
Material losses
The air outlet in the knurled cap of the quick-action air
vent valve must not point towards the MFG PCB.
Turn the air outlet in the direction shown in the fol-
lowing diagram.
D0000037503
!
Material losses
Close the quick-action air vent valve again after
venting.
11.9 DHW connection
To connect the DHW, remove the lower front panel (see chapter
"Installation / Maintenance / Removing the lower front panel").
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