Filling The Condensate Siphon; Preventing Low Water Pressure - Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

Total
Water hardness at specific system volume
heating
output
≤ 20 l/kW
kW °dH mol/m³
> 50 11.2 2
to ≤ 200
> 200 8.4 1.5
to ≤ 600
> 600 0.11 0.02
1) Nominal capacity in litres/heating output; in the case of multi-
boiler systems, the smallest single heating output is to be used.
Validity: Great Britain OR Ireland
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 2 0.02
1) Nominal capacity in litres/heating output; in the case of multi-
boiler systems, the smallest single heating output is to be used.
Validity: Great Britain OR Ireland OR New Zealand
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
34
> 20 l/kW
> 50 l/kW
≤ 50 l/kW
°dH mol/m³ °dH mol/m³
8.4 1.5 0.11 0.02
0.11 0.02 0.11 0.02
0.11 0.02 0.11 0.02
> 20 l/kW
> 50 l/kW
≤ 50 l/kW
ppm mol/ ppm mol/
CaCO₃ m³ CaCO₃ m³
200 2 2 0.02
150 1.5 2 0.02
2 0.02 2 0.02
2 0.02 2 0.02
–
Sentinel X 100
1)
–
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.
9.9

Filling the condensate siphon

1)
C
1. Unclip the lower section of the siphon (1) from the up-
per section of the siphon (2) without removing the pro-
duct's front casing.
2. Remove the float (3).
3. Fill the lower section of the siphon with water up to 10
mm below the upper edge of the condensate discharge
pipe.
4. Re-insert the float (3).
Note
Check whether the float is present in the
condensate siphon.
5. Clip the lower section of the siphon (1) into the upper
section of the siphon (2).
9.10

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 0.1 MPa
(1.0 bar), the product indicates low pressure by displaying a
flashing pressure value. If the filling pressure falls below 0.05
MPa (0.5 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 on the display until a pressure of
0.11 MPa (1.1 bar) or higher has been reached.
▶
If you notice frequent drops in pressure, determine and
eliminate the cause.
Installation and maintenance instructions ecoTEC plus 0020261389_03
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