Commissioning
Installation and maintenance instructions ecoTEC 0020173113_01
41
10
1
2
10.8 Flue gas and air measure points
Legend:
1 Flue gas measure point
2 Air measure point
For checking the system for recirculation use the air meas-
ure point (
2
).
>
Use the flue gas analyser.
>
If you detect any CO or CO
2
in the fresh air, search for
the flue gas leakage or recirculation.
>
Correct the defects.
>
Check again as described before, if there is any CO or
CO
2
in the fresh air.
>
If you cannot correct the defects you must not start up
the boiler.
10.12
Checking the gas flow rate
The boiler is fitted with a multifunctional automatic gas
valve which ensures that the precise air/gas ratio is pro-
vided under all operating conditions. The gas flow rate has
been set during production and does not require adjust-
ment. With the front casing fitted check the gas flow rate of
the boiler as follows:
>
Start the boiler by activating the test program P.01 as
described in
¬ section 10.2
.
>
In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
>
Only for VUW boilers: Alternatively, fully open the hot
water taps to ensure full flow rate through the boiler.
>
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.
>
Check that the gas flow rate is as stated in
¬ table 10.4
.
If the measured gas flow rate lies outside the tolerance lim-
its specified in
¬ table 10.4
, do not operate the boiler and
inform the Vaillant Service Solutions (0870 6060 777).
If the measured gas flow rate is within the tolerance limits
shown in
¬ table 10.4
, then proceed as follows:
>
Take the boiler out of operation by
– terminating test program P.01 as described in
¬ sec-
tion 10.2
.
– Only for VUW boilers:
Allow the boiler to cool down
by turning off water taps and allow pump overrun
to operate for a minimum of two minutes.
>
Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.
Boiler
Gas flow rate (as per BS EN 483)
Gas in m
3
/h
nominal
+ 5 %
- 10 %
22
4.2
4.4
3.8
26
4.2
4.4
3.8
10.4
Gas flow rates
10.13
Carrying out a full function test
>
After completing the installation and the gas setting,
perform a complete function check of the boiler before
starting up the boiler and handing it over to the opera-
tor.
>
Start up the boiler in accordance with the relevant oper-
ating instructions.
10.9
Checking for leaks
>
Check the gas supply line, the flue gas installation, the
heating installation and the hot water pipes for leaks.
>
Check the air/flue gas duct for correct installation.
>
Make absolutely sure that the front casing is properly
fitted.
>
Check the heating mode (
¬ section 10.13.1
)
>
Check the operation of the hot water generation (
¬ sec-
tion 10.13.2
)
