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7 Start-up
▽
The settings for the function can be changed in the
current programme.
▶
Return to the programme steps in order to
change the settings or the current day.
◁
If the screed drying has not been run successfully
by day 29, the display shows the message Screed
drying ending.
▽
If a fault occurs during screed drying, the display
shows the message Fault.
▶
Select a new start day for the screed drying or
interrupt the process.
7.2
Setting the prioritising diverter valve
1.
Install the selection lever from the bag of small parts on
the prioritising diverter valve.
90°
3
2.
If you want to manually set the prioritising diverter
valve, press the knob (1) and turn it 90° clockwise.
◁
You can now turn the selection lever (2) to the re-
quired position.
Note
The notch (3) along the selection lever dis-
plays the selected mode.
For example: If the notch along the selection
lever is pointing clockwise: The heating cir-
cuit is selected.
3.
If you want to actuate the heating circuit, turn the selec-
tion lever to "Heating circuit".
4.
If you want to actuate the domestic hot water cylinder,
turn the selection lever to "Domestic hot water cylinder".
5.
If you want to actuate the heating circuit and the do-
mestic hot water cylinder, turn the selection lever to
"Heating circuit/domestic hot water cylinder".
34
1
2
7.3
Checking and treating the heating
water/filling and supplementary water
Caution.
Risk of material damage due to poor-qual-
ity heating water
▶
Ensure that the heating water is of suffi-
cient quality.
▶
Before filling or topping up the installation, check the
quality of the heating water.
Checking the quality of the heating water
▶
Remove a little water from the heating circuit.
▶
Check the appearance of the heating water.
▶
If you ascertain that it contains sedimentary materials,
you must desludge the installation.
▶
Use a magnetic rod to check whether it contains mag-
netite (iron oxide).
▶
If you ascertain that it contains magnetite, clean the in-
stallation and apply suitable corrosion-protection meas-
ures, or fit a magnetic filter.
▶
Check the pH value of the removed water at 25 °C.
▶
If the value is below 8.2 or above 10.0, clean the installa-
tion and treat the heating water.
▶
Ensure that oxygen cannot get into the heating water.
Checking the filling and supplementary water
▶
Before filling the installation, measure the hardness of the
filling and supplementary water.
Treating the filling and supplementary water
▶
Observe all applicable national regulations and technical
standards when treating the filling and supplementary
water.
Provided the national regulations and technical standards
do not stipulate more stringent requirements, the following
applies:
You must treat the heating water in the following cases:
–
If the entire filling and supplementary water quantity dur-
ing the operating life of the system exceeds three times
the nominal volume of the heating installation, or
–
If the guideline values listed in the following table are not
met, or
–
If the pH value of the heating water is less than 8.2 or
more than 10.0.
Applicability: Great Britain
Total
Water hardness at specific system volume
heating
output
≤ 20 l/kW
ppm
mol/
kW
CaCO₃
< 50
< 300
< 3
> 50
200
2
to ≤ 200
> 200
150
1.5
to ≤ 600
> 600
2
0.02
Installation and maintenance instructions Hydraulic station 0020257319_02
> 20 l/kW
> 50 l/kW
≤ 50 l/kW
ppm
mol/
ppm
m³
CaCO₃
m³
CaCO₃
200
2
2
150
1.5
2
2
0.02
2
2
0.02
2
1)
mol/
m³
0.02
0.02
0.02
0.02
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