Vaillant ecoCRAFT exclusive VKK GB 1206/3-E R1 Installation And Maintenance Instructions Manual page 16

7 Start-up
Display Meaning
P.05 Test function for the safety cut-out (SCO): The
burner is switched on at maximum power and the
pumps are switched off; the temperature control is
switched off so that the burner heats up until the
safety cut-out is triggered by reaching the safety cut-
out temperature.
▶
Press and hold the + button and, at the same time, briefly
press the Fault clearance key. Release the + button only
when P.00 is shown in the display.
▶
Press the + or − button to switch to the next check pro-
gramme.
▶
Press the i button to start the check programme.
7.5 Reading off the filling pressure
The product comes with a digital pressure indicator.
▶
To read off the digital value for the filling pressure, press
the – button briefly.
◁
The display will show the filling pressure for approx-
imately 5 seconds.
If the heating installation is full, the filling pressure must be
between 0.1 MPa and 0.2 MPa (1.0 bar and 2.0 bar) to en-
sure it operates properly.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
7.6 Preventing low water pressure
To prevent damage to the heating installation that is caused
by low filling pressure, the product is fitted with a water
pressure sensor. If the filling pressure falls below 0.06 MPa
(0.6 bar), the product indicates low pressure by displaying a
flashing pressure value. If the filling pressure falls below 0.03
MPa (0.3 bar), the product switches off. The display shows
F.22.
▶
Top up the heating water to start the product up again.
The pressure value flashes in the display until a pressure of
0.6 MPa (6 bar) or higher has been reached.
▶
If you notice frequent drops in pressure, determine and
eliminate the cause.
7.7 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 system, 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 system.
16
▶
Use a magnetic rod to check whether it contains mag-
netite (iron oxide).
▶
If you ascertain that it contains magnetite, clean the sys-
tem and apply suitable corrosion-protection measures, or
fit a magnet 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 system
and treat the heating water.
▶
Ensure that oxygen cannot get into the heating water.
Checking the filling and supplementary water
▶
Before filling the system, 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.
Total
Water hardness at specific system volume
heating
output
≤ 20 l/kW
ppm
kW
CaCO₃
< 50 < 300
> 50 200
to ≤ 200
> 200 150
to ≤ 600
> 600 2
1) Nominal capacity in litres/heating output; in the case of multi-
boiler systems, the smallest single heating output is to be used.
Caution.
Risk of material damage if the heating
water is treated with unsuitable additives.
Unsuitable additives may cause changes in
the components, noises in heating mode and
possibly subsequent damage.
▶
Do not use any unsuitable frost and cor-
rosion protection agents, biocides or seal-
ants.
No incompatibility with our products has been detected to
date with proper use of the following additives.
▶
When using additives, follow the manufacturer's instruc-
tions without exception.
We accept no liability for the compatibility of any additive or
its effectiveness in the rest of the heating system.
Installation and maintenance instructions ecoCRAFT exclusive 0020149561_01
> 20 l/kW
≤ 50 l/kW
mol/ ppm mol/ ppm
m³ CaCO₃ m³ CaCO₃
< 3 200 2 2
2 150 1.5 2
1.5 2 0.02 2
0.02 2 0.02 2
1)
> 50 l/kW
mol/
m³
0.02
0.02
0.02
0.02