Wolf CGB-(K)-11 Handbuch Seite 52

B) CO adjustment at the lower load (soft start)
2
- Restart the boiler by pressing the „Reset button".
- Check and correct (if required) the CO
s after burner start with the CO
the zero point adjusting screw in accordance with the table
below. Make this adjustment within 120 s after burner start.
If necessary, repeat the start phase for setting purposes by
pressing the „Reset button".
- Turn clockwise - higher CO
- Turn anti-clockwise - lower CO
CGB / CGB-K boiler open
at lower load
Natural gas H
8,8% ± 0,2%
C) Checking the CO adjustment
2
- After completing the work, refit the casing lid and check the
CO value with the boiler closed.
2
During the initial start-up, the EC emissions can reach
NB
200 ppm for the first hours, as binding agents from
the insulation combust.
Observe the CO emissions whilst making CO
justments. The gas combination valve is incorrectly
adjusted, if the CO value lies >200ppm, when the
CO value is correct. In that case, take the following
2
steps::
- Fully insert the zero point adjusting screw
- open the zero point adjusting screw 3 revolutions for natural
gas, and 2 revolutions for LPG.
- Repeat the adjusting process from section A).
- The boiler is correctly adjusted, when the CO
sponds with those in the adjacent table.
D) Completing the adjustments
- Switch the boiler OFF and close the test ports and hose
nipple; check for leaks.
52
Service Manual
content approx. 20
2
meter, by fine adjusting
2
content.
2
content.
2
LPG P
10,8% ± 0,5%
ad-
2
value corre-
2
Zero point adju-
sting screw
Fig.: Gas combination valve
Test port „Flue gas"
Fig.: Flue gas test with a closed boiler
CGB / CGB-K boiler closed
at upper load
Natural gas H
9,0% ± 0,2%
CGB / CGB-K boiler closed
at lower load
Natural gas H
9,0% ± 0,2%
LPG P
10,1% ± 0,3%
LPG P
11,1% ± 0,5%
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