Concentration (Or The Air Ratio) - Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

8 Inspection and maintenance
8.1.4 Adjusting the CO
ratio)
a
Danger!
Increased risk of poisoning from incorrect
setting!
If one of the flue gas values is above the per-
missible values specified in Tab. 8.1, there is a
risk of poisoning.
> Check that the entire flue gas system is in
good condition.
> Check that the seals in the combustion cir-
cuit are in good condition.
> Check the gas flow pressure - the gas flow
rate.
If the flue gas value needs to be adjusted,
> unfasten the screw (Fig. 8.1, 2) and
> fold the air intake pipe (Fig. 8.1, 3) forwards through
90°. Do not remove the air intake pipe.
> Specify the required flue gas value if necessary (value
with front casing of boiler removed, see Table 8.1) by
turning the screw of the main throttle (Fig. 8.1, 4)
i
Use a 4 mm hexagon socket spanner to turn
the screw.
> Turn to the left: higher CO
> Turn to the right: lower CO
i
Natural gas: Only perform the adjustment in
increments of 1/8 turn and wait approximately
1 minute after each adjustment until the value
stabilises.
Liquid gas: Only perform the adjustment in
very small increments (approximately 1/16
turns), and wait approximately 1 minute after
each adjustment until the value stabilises.
> After performing the adjustments, fold the air intake
pipe back up.
> Check the CO
concentration once again.
2
> If necessary, repeat the setting process.
> Push the „i" button to deactivate the full load mode.
The full load mode is also deactivated if no button is
pushed for 15 minutes.
> The adjusting screw shall be sealed after the adjust-
ment.
> Re-secure the air intake pipe with the screw (2).
> Put the front casing back on.
42
concentration (or the air
2
concentration,
2
concentration.
2
Settings
CO after 5 minutes full
2
load mode with
boiler front casing closed
CO after 5 minutes full
2
load mode with boiler
front casing removed
Set for Wobbe-Index W
CO value with full load
CO/CO
2
Table 8.1 Factory gas settings
a
Danger!
Danger of poisoning!
CO is an extremely poisonous gas. An exces-
sive CO content may result in death.
> If the boiler cannot be set correctly and the
flue gas value remains over the permissible
value specified in Tab. 8.1, contact the Vail-
lant customer service.
> Do not operate the boiler.
Installation and maintenance instructions ecoTEC exclusive 0020017768_07
Natural gas (H) Propane
Tolerance Tolerance
9.2  1,0 10.2  0,5 Vol.–%
9.0  1,0 10.0  0,5 Vol.–%
15 22.5
0
< 250 < 250
< 0.0031 < 0.0026
Unit
3
kWh/m
ppm