Wolf CGB-75 Installation And Operating Instructions Manual page 39

B) CO setting for lower load (soft start)
2
- Remove the protective screw over the zero point adjusting
screw with a Torx screwdriver.
- Restart the condensing boiler by pressing the "Reset button".
- Check and correct (if required) the CO
after the burner start with the CO
the zero point adjusting screw with Torx in accordance with
the table. Make this adjustment within 180 s of the burner
start. If necessary, repeat the start phase for the setting
procedure by pressing the reset button.
- During this adjustment, there must be no DHW operation!
- Clockwise rotation – higher CO
- Anti-clockwise rotation – lower CO
Appliance open
at lower load
Natural gas E/H/LL
8.5% ± 0.2%
- Retighten the protective screw.
C) Checking the CO setting
2
- After completing the work, refit the casing cover and check
the CO values with the appliance closed.
2
Observe the CO emissions whilst making
CO settings. The gas combination valve is
2
incorrectly adjusted if the CO value is > 300
ppm when the CO
following steps:
- Fully insert the zero point adjusting screw
- Open the zero point adjusting screw 1½ revolutions
- Repeat the adjusting process from section A)
- The condensing boiler is correctly adjusted if the CO
correspond to those in the adjacent table.
D) Completing the adjustments
- Shut down the boiler and close the test ports and hose
connection nipples again. Check the gas supply line and
hydraulics for tightness.
3062555_201804
23. CO
content approx. 20 s
2
tester, by fine adjusting
2
content increased!
2
content reduced!
2
LNG P
9.7% ± 0.2%
value is correct. Take the
2
values
2
adjustments
2
Zero point
screw
Protective
screw
Fig.: Gas combination valve
Fig.: Emission test with closed appliance
Natural gas E/H/LL
8.8% ± 0.5%
Natural gas E/H/LL
8.7% ± 0.5%
Gas throughput
adjusting screw
Test port
"Flue gas"
Appliance closed
at upper load
LNG P
10.3% ± 0.5%
Appliance closed
at lower load
LNG P
9.9% ± 0.5%
39