Adjusting The Co; (Or The Air Ratio); Concentration - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

Note
The boiler is fitted with a flue gas analysis
point (4). A suitable flue gas analyser can be
connected to this point to establish the
combustion performance of the boiler.
• Remove the front casing.
• Start the testing program P.1.
• Wait at least 5 minutes until the boiler reaches its
operating temperature.
• Measure the CO concentration at the flue gas
2
analysis point (4). Compare the measured value with
the corresponding value in Table 7.1.
• If all these points are as required, proceed as
described in section 7.1.5.
• If one of the flue gas values is greater than the
acceptable values in Table 7.1, then proceed as
described in the following section 7.1.4.

7.1.4 Adjusting the CO

(or the air ratio)

d Danger!
Increased risk of poisoning due to incorrect
settings!
Incorrect setting may increase the risk of
poisoning.
• If one of the flue gas values is greater than
the acceptable values in Table 7.1 then check
- the integrity of the complete flue gas
installation
- the integrity of the combustion circuit seals
- the gas inlet working pressure
- the gas flow rate.
If the flue gas value needs to be adjusted,
• unfasten the screw (Fig. 7.1, 2) and
• fold the air intake pipe (Fig. 7.1, 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 7.1) by
turning the screw of the main throttle (Fig. 7.1, 1).
h Note
Use a 4 mm hexagon socket spanner to turn
the screw.
• Turn to the left: higher CO
• Turn to the right: lower CO
h Note
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.
Instructions for installation and servicing ecoTEC 839592_12

concentration

2
concentration,
2
concentration.
2
Inspection and maintenance 7
• 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
adjustment.
• Re-secure the air intake pipe with the screw (2).
• Put the front casing back on.
Settings Natural gas (H)
Tolerance
CO after 5 min. full load
2
mode with appliance
front closed
CO after 5 min. full load
2
mode with appliance
front removed
Set for Wobbe-Index W
0
CO value with full load
CO/CO
2
Table 7.1 Factory gas setting
d Danger!
Risk to life due to poisoning!
CO is an extremely toxic gas. Risk to life due to
excessive CO concentrations.
• If you are not able to adjust the boiler
correctly and the flue gas values remain
higher than allowed in Table 7.1, call the
Vaillant Service Solutions.
• Do not start up the boiler!
Propane Unit
Tolerance
9.2 1,0 10.2 0,5 Vol.–%
9.0 1,0 10.0 0,5 Vol.–%
15 22.5 kWh/m
< 250 < 250 ppm
< 0,0031 < 0,0026
3
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