iNSTaLLaTiON
installation
14
| WPL E | WPL cool
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10.5 Filling the heating system
Heating water quality
Carry out a fill water analysis before filling the system. This may,
for example, be requested by 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. Always observe
the fill water limits specified in the "Specification / Data
table" chapter.
f
f
Recheck these limits 8-12 weeks after commission-
ing and as part of the annual system maintenance.
Note
With a conductivity > 1000 μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
Suitable appliances for water softening and desalinating,
as well as for filling and flushing heating systems, can be
obtained from trade suppliers.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
10.5.1 Filling the heating system
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0
3
01
0
95
8
1
1 Drain
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Fill the heating system via the drain.
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After filling the heating system, check the connections for
tightness (visual and physical inspection).
10.5.2 Venting the heating system
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0
3
01
1
726
1
1 Quick-action air vent valve
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Vent the pipework carefully.
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In doing so, also activate the quick-action air vent valve.
10.6 Minimum flow rate
Note
In combination with an hydraulic module or integral cyl-
inder, the flow rate can be checked and set at the heat
pump manager. Observe that the flow rate is set indirectly
via the rating of the pump used.
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Call up the flow rate in the heat pump manager
menu “INFO / HEATING / FLOW RATE” or “INFO /
DHW / FLOW RATE”.
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Adjust the flow rate in the heat pump manager
menu “COMMISSIONING / HEATING / HEATING CIRC
PUMP RATE” or “COMMISSIONING / DHW / DHW
PUMP RATE”.
The minimum flow rate is set via the temperature differential of
the buffer circuit.
Set the buffer charging pump so that the value is equal to or lower
than the maximum temperature differential.
The setting is made in heat pump mode. In order to do this,, firstly
make the following settings:
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Temporarily remove the fuse from the electric emergency/
booster heater to isolate the emergency/booster heater from
the power supply. Alternatively, switch OFF the second heat
generator.
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Operate the appliance in heating mode.
