10 Inspection and maintenance
28
Installation and maintenance instructions ecoTEC pure 0020258016_01
10.4
Setting the CO
₂
content
Conditions
: The CO
₂
content must be adjusted
2
1
▶
Remove the sticker.
▶
Remove the covering cap
(1)
.
▶
Turn the screw
(2)
to set the CO
₂
content (value with
front casing removed).
◁
To increase the CO
₂
content: Turn anti-clockwise
◁
To decrease the CO
₂
content: Turn clockwise
Note
For natural gas only: Only perform the adjust-
ment in small increments of a 1/8 turn and
wait approx. one minute after each adjust-
ment until the value stabilises.
For liquid gas only: Only perform the adjust-
ment in extremely small increments (approx.
1/16 turn), and wait approx. one minute after
each adjustment until the value stabilises.
▶
Compare the measured value with the corresponding
value in the table.
G20
–
Setting the CO
₂
value
Germany
Natural gas
Removed front
casing
Fitted front cas-
ing
G20
G20
CO
₂
at full load
9.2
±
0.3 %
9.4
±
0.3 %
Set for Wobbe in-
dex W
₀
14.09 kW
⋅
h/m
³
14.09 kW
⋅
h/m
³
O
₂
at full load
4.5
±
0.5 vol. %
4.2
±
0.5 vol. %
Germany
Natural gas
Removed front
casing
Fitted front cas-
ing
G20
G20
CO at full load
≤
250 ppm
≤
250 ppm
CO/CO
₂
≤
0.0027
≤
0.0027
G25
–
Setting the O
₂
value
Germany
Natural gas
Removed front
casing
Fitted front cas-
ing
G25
G25
CO
₂
at full load
8.8
±
0.3 %
9.0
±
0.3 %
Set for Wobbe in-
dex W
₀
11.54 kW
⋅
h/m
³
11.54 kW
⋅
h/m
³
O
₂
at full load
4.9
±
0.5 vol. %
4.6
±
0.5 vol. %
CO at full load
≤
250 ppm
≤
250 ppm
CO/CO
₂
≤
0.0028
≤
0.0028
G31
–
Setting the CO
₂
value
Germany
Liquid gas
Removed front
casing
Fitted front cas-
ing
G31
G31
CO
₂
at full load
10.2
±
0.3 %
10.4
±
0.3 %
Set for Wobbe in-
dex W
₀
21.34 kW
⋅
h/m
³
21.34 kW
⋅
h/m
³
O
₂
at full load
5.4
±
0.4 vol. %
5.1
±
0.4 vol. %
CO at full load
≤
250 ppm
≤
250 ppm
CO/CO
₂
≤
0.0024
≤
0.0024
▽
If the setting is not in the specified adjustment range,
you must not start up the product.
▶
Contact customer service.
▶
Check whether the air-quality requirements with regard
to carbon monoxide are fulfilled.
▶
Refit the covering cap.
▶
Fit the front panel.
10.5
Preparing the maintenance work
1.
Decommission the product.
2.
Disconnect the product from the power mains.
3.
Remove the front casing. (
→
Page 10)
4.
Close the gas isolator cock.
5.
Close the service valves in the heating flow and in the
heating return.
6.
Close the service valve in the cold water pipe.
7.
Drain the product to clean hydraulic components
(
→
Page 29).
8.
Ensure that water does not drip on live components
(e.g. the electronics box).
9.
Use only new seals.
