Gas Inspection - Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

9.13

Gas inspection

9.13.1 Checking the factory setting
Caution.
An incorrect gas type setting may cause
malfunctions or a reduction in the service
life of the product.
If the product design does not match the local
gas type, this may lead to malfunctions or to
some components wearing prematurely.
▶
Before you start up the product, compare
the gas type information on the data plate
with the gas type group available at the
installation site.
The product's combustion has been factory tested and is
preset for operation with the gas type indicated on the data
plate. In some supply areas, these settings may need to be
adjusted at the installation site.
Condition: The product design is not compatible with the local gas type
▶
Do not start up the product.
▶
Carry out a gas conversion in accordance with your in-
stallation.
Condition: The product design is compatible with the local gas type
▶
Proceed as described below.
9.13.2 Checking the air/flue pipe/flue gas
recirculation
Validity: Great Britain OR Ireland
▶
Check the flue gas installation is intact in accordance
with the latest gas safe technical bulletin and informa-
tion supplied in the installation instructions.
1. For extended flue gas installations check for flue gas
recirculation using the air analysis point.
2. Use a flue gas analyser.
3. If you discover unusual levels of CO or CO
supply air, search for the leak in the flue system or for
signs of flue gas recirculation.
4. Eliminate the damage properly.
5. Check again whether the supply air contains any un-
usual levels of CO or CO
6. If you cannot eliminate the damage, do not start up the
product.
9.13.3 Checking the gas flow rate
Validity: Great Britain OR Ireland
The boiler is fitted with a multifunctional automatic gas valve
which ensures that the precise air/gas ratio is provided un-
der all operating conditions. The gas flow rate has been set
during production and does not require adjustment. With the
front casing fitted check the gas flow rate of the boiler as fol-
lows:
▶
Start up the product with the check programme P.01.
▶
In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
36
in the
2
.
2
▶
Wait at least 5 minutes until the boiler has reached its
operating temperature.
▶
Ensure that all other gas appliances in the property are
turned off.
▶
Measure the gas flow rate at the gas meter.
▶
Compare the measured values with the corresponding
values in the table.
Validity: VU 446/5-5 (H-GB)
Qnw from
H gas in m³/h
the data
Nom.
plate
8.1 0.86
−
9.5
26.7 2.82
−
27.4
45.2 4.78
Validity: VU 606/5-5 (H-GB)
Qnw from
H gas in m³/h
the data
Nom.
plate
11.3 1.19
35.7 3.77
60.0 6.34
Condition: Gas flow rate not in the permissible range
▶
Check all of the piping and ensure that the gas flow rates
are correct.
▶
Only put the product into operation once the gas flow
rates have been corrected.
Condition: Gas flow rate in the permissible range
▶
End check programme P.01.
▶
Allow the boiler to cool down by allowing pump overrun to
operate for a minimum of two minutes.
▶
Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.
Installation and maintenance instructions ecoTEC plus 0020261389_03
P gas in m³/h
−10%
+5% +5%
Nom.
− −
0.90 0.77
− −
0.39 0.41
− −
2.96 2.54
− −
1.19 1.25
5.02 4.30 1.85 1.94
P gas in m³/h
−10%
+5% +5%
Nom.
1.25 1.08 0.46 0.49
3.96 3.39 1.46 1.53
6.66 5.71 2.45 2.58
−10%
−
0.35
−
1.07
1.67
−10%
0.42
1.31
2.21