Inspection and maintenance
46
ecoTEC plus installation and maintenance instructions 0020134823_01
13
13.1.3
Checking the CO
2
content
The CO
2
content must be checked/set in the following
cases:
– When replacing the gas valve
– If you suspect incorrect combustion.
– At initial start-up
– During any maintenance work
– When replacing the fan or burner
– If there are changes to the gas installation
1
13.1
Checking the CO
2
content
i
The boiler is equipped with a flue gas analysis
point (
1
). A suitable flue gas measuring instru-
ment can be used to check the combustion per-
formance of the measuring instrument at this
analysis point.
>
Remove the front casing (
¬ section 4.6
).
>
Start check programme P.1 (
¬ section 11.4
).
>
Wait at least 5 minutes until the boiler reaches its
operating temperature.
>
If required, remove the upper casing.
>
Measure the CO
2
content at the flue gas analysis point
(
1
). Compare the measured value with the corresponding
value in
¬ table 13.1
.
Settings Unit
Natural gas H
Tolerance
CO
2
after 5 minutes full load
operation with front casing
closed
Vol.-%
9.0 +/- 0.5
CO
2
after 5 minutes full load
operation with front casing
removed
Vol.-%
8.8 +/- 0.5
Set for Wobbe Index W
0
kWh/m
3
15
13.1
Gas default settings
>
If all these points meet the requirements, continue in
accordance with
¬ section 13.2
.
>
If one of the flue gas values is above the permissible
value in
¬ table 13.1
, continue in accordance with the
following
¬ section 13.1.4
.
13.1.4
Setting the CO
2
content (or setting the air
ratio)
a
Danger!
Increased risk of poisoning from incor-
rect setting.
If one of the flue gas values is above the
permissible values in
¬ table 13.1
:
>
Check that the entire flue gas system is
in good condition.
>
Check that the seals of the combustion
system are in good condition.
>
Check the gas connection pressure (gas
flow pressure).
>
Check the gas volume flow.
1
1
806/5-5
1006/5-5
1206/5-5
13.2
Carry out the CO
2
measurement, air index setting
Summary of Contents for ECOTEC PLUS VU 80
Page 70: ......
Page 71: ......
Page 74: ......
Page 75: ......
Page 76: ...0020134823_01 GBIE 122012 Subject to change Manufacturer Supplier...
