Vaillant ecoTEC plus Bedienungsanleitung Seite 26

► Now reinstall the other components (venturi with the gas
nozzle and gas connection pipe) in the reverse order as
described in Chap. 2.2.
2.3 Changing the coded resistance
► Unclip the rear cover (2) of the electronics box from the
brackets on the electronics box (3).
► Remove the old coded resistance (1, fi g 2.4).
► Insert the new coded resistance from the conversion set.
i
Note
The colour of the coded resistance must
correspond with the colour of the gas nozzle.
► Close the rear cover of the electronics box.
Fig. 2.4 Replacing the coded resistance
2.4 Re-commissioning the heating device
Danger
a
Danger to life from poisoning and
explosions following leaks.
After concluding the conversion,
►
perform a function and leaks test.
Caution.
b
Risk of damage to property from
leak detection spray.
The leak detection spray blocks the
filter of the mass flow sensor on the
venturi and thus destroys the mass
flow sensor.
Do not spray any leak detection
►
spray on the cover cap (2, fig. 2.3)
on the filter of the venturi.
► Affi x the label included in the conversion set for gas
group conversion next to the heating device type plate.
► Open the gas cutoff valve.
► Switch on the heating device.
► Check the gas connection pressure (see installation
instructions).
0020161081_05
CONVERTING THE GAS GROUP
► Perform the gas family check.
("Menu → Qualifi ed technician level → Test programme
→ Gas family check").
i
Note
CO
2
family check!
► Measure the CO
connection.
► If the CO value lies outside the correct setting range
2
(see table: factory side gas setting values), perform
an air ratio setting (see installation and maintenance
instructions).
Setting values
CO full-load
2
operation with closed
front panel after 5
min.
CO full-load
2
operation with
dismantled front
panel after 5 min.
O full-load operation
2
with closed front
1
panel after 5 min.
Tab. 2.3 natural gas-Set values
measurement is not possible during the gas
content at the exhaust measurement
2
Natural gas
Unit
(G20)
Vol.–% 9,2 ± 0,3
Vol.–% 9,0 ± 0,3
Vol.–% 4,5 ± 0,5
Propane
(G31)
10,4 0,3
10,2 0,3
5,1 0,5
25