Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual page 34

9.2 Carrying out the initial start-up
Initial start-up must be carried out by a customer service
technician or an authorised competent person using the
Benchmark Checklist. The Benchmark Checklist in the ap-
pendix (→ Appendix M) of the installation instructions must
be filled in and stored carefully along with the unit's docu-
mentation.
▶
Carry out the start-up procedure using the Benchmark
Checklist in the appendix.
▶
Fill out and sign the Benchmark Checklist.
9.3 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-inhibition meas-
ures (e.g. fit a magnetite separator).
▶
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
rules when treating the filling and supplementary water.
Provided the national regulations and technical rules do not
stipulate more stringent requirements, the following applies:
You must treat the filling and supplementary 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.
34
Total
Water hardness at specific system volume
heating
output
≤ 20 l/kW
ppm mol/
kW
CaCO₃ m³
< 50 < 300 < 3
> 50 200 < 2
to ≤ 200
> 200 150 < 1.5
to ≤ 600
> 600 5 0.05
1) Nominal capacity in litres/heat output; in the case of multi-
boiler systems, the smallest single heat 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 antifreeze and
corrosion inhibitors, biocides or sealants.
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.
Additives for cleaning measures (subsequent
flushing required)
–
Adey MC3+
–
Adey MC5
–
Fernox F3
–
Sentinel X 300
–
Sentinel X 400
Additives intended to remain permanently in the
installation
–
Adey MC1+
–
Fernox F1
–
Fernox F2
–
Sentinel X 100
–
Sentinel X 200
Additives for frost protection intended to remain
permanently in the installation
–
Adey MC ZERO
–
Fernox Antifreeze Alphi 11
–
Sentinel X 500
▶
If you have used the above-mentioned additives, inform
the end user about the measures that are required.
▶
Inform the end user about the measures required for frost
protection.
Installation and maintenance instructions 0020308121_04
> 20 l/kW
> 40 /kW
≤ 40 l/kW
ppm mol/ ppm mol/
CaCO₃ m³ CaCO₃ m³
≤ 1.5
150 5 0.05
≤ 1.5
150 5 0.05
5 0.05 5 0.05
5 0.05 5 0.05
1)