7 Start-up
26
Installation and maintenance instructions ecoTEC plus 0020261389_02
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.
7.10.2 Checking the leak-tightness of the flue gas
installation and flue gas recirculation
Applicability:
Great Britain
OR Ireland
1.
Check the flue gas installation is intact in accordance
with the latest gas safe technical bulletin and informa-
tion supplied in the installation instructions.
2.
For extended flue gas installations check for flue gas
recirculation using the air analysis point.
3.
Use a flue gas analyser.
4.
If you discover CO or CO
2
in the supply air, search for
the leak in the flue gas installation or for signs of flue
gas recirculation.
5.
Eliminate the damage properly.
6.
Check again whether the supply air contains any CO or
CO
2
.
7.
If you cannot eliminate the damage, do not start up the
product.
7.10.3 Checking the gas flow rate
Applicability:
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.
▶
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.
Applicability:
VU 446/5-5 (H-GB)
Qnw from
the data
plate
H gas in m
³
/h
P gas in m
³
/h
Nom.
+5%
−
10%
Nom.
+5%
−
10%
8.1
0.86
0.90
0.77
−
−
−
9.5
−
−
−
0.39
0.41
0.35
26.7
2.82
2.96
2.54
−
−
−
27.4
−
−
−
1.19
1.25
1.07
45.2
4.78
5.02
4.30
1.85
1.94
1.67
Applicability:
VU 606/5-5 (H-GB)
Qnw from
the data
plate
H gas in m
³
/h
P gas in m
³
/h
Nom.
+5%
−
10%
Nom.
+5%
−
10%
11.3
1.19
1.25
1.08
0.46
0.49
0.42
35.7
3.77
3.96
3.39
1.46
1.53
1.31
60.0
6.34
6.66
5.71
2.45
2.58
2.21
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.
7.10.4 Checking the gas flow pressure
A
B
D
C
1.
Ensure that the gas inlet working pressure can be
obtained with all other gas appliances in the property
working.
2.
Close the gas stopcock.
3.
Alternatives 1
‒
Measuring the gas pressure at
the gas valve assembly::
▶
Undo the test nipple screw
(A)
on the gas valve
assembly.
Summary of Contents for ecoTEC plus VU 446/5-5 (H-GB)
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