Vaillant ecoTEC VU User Manual

Commissioning
Installation and maintenance instructions ecoTEC 0020173113_01 39
10
10.10 Adjusting the boiler to the gas used on the
Channel Islands
The gas ratio can only be correctly set if the gas flow pres-
sure is within the permissible tolerances at the same time.
For this reason, the two measurements are taken at the
same time.
> Restore the power supply to the boiler.
> Switch on the boiler.
> Change the value of diagnostics code D.051, which was
preset at the factory, to 0 (¬ section 11.1).
> Change the value of diagnostics code D.050, which was
preset at the factory, to 1000 (¬ section 11.1).
1
10.6 Measuring connection for flue gas
> Connect a CO
2
measuring instrument to the measuring
connection (1) of the boiler.
i
Information for making adjustments with a flue
gas analyser:
Many flue gas analysers work internally with an
O
2
sensor. The CO
2
value that is displayed is cal-
culated using the measured O
2
value. To ensure
that the gas ratio setting works properly with
these units, the correct energy source [repre-
sentative CO
2 max
value] must be set. For this, liq-
uid gas [LPG] must be selected as the energy
source.
1
2
10.7 Measuring the gas inlet working pressure
> Undo the sealing screw of the measuring nipple (1)
(lefthand screw) at the gas valve using a screwdriver.
> Connect a digital pressure gauge or U-tube manometer
(2) to the measuring nipple (1).
> Open the gas isolation valve of the boiler.
> 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.
> With the boiler operating at full load check that the gas
inlet working pressure at the reference test point (1)
complies with the requirements of ¬table 10.2.
> Should the pressure recorded at the reference test point
in the boiler be lower than indicated (¬table 10.2) check
if there is any blockage in the pipework or if the pipe-
work is undersized.

Vaillant ecoTEC VU Specifications

General

Brand	Vaillant
Model	ecoTEC VU
Category	Boiler
Language	English