Co 2 Adjustments; Co Adjustments - Wolf CGB-75 Assembly And Operating Instructions Manual

Adjusting the gas:air connection
Carry out the adjustments in the following sequence: At the factory, the gas combination valve has been
NB
adjusted for the gas type stated on the type plate. Only adjust the gas combination valve after the system has
been changed to a different gas type or when servicing.
If too little heat is drawn off, open some radiator valves.
A) CO adjustment at the upper load (emissions
2
test mode)
Release the casing cover with the l.h. and r.h. screw. Release
the bottom of the casing cover and unhook at the top
- Remove the screw from the l.h. "Flue gas" test port
- Insert the test probe of the CO
test port (approx. 120 mm)
- Turn the temperature selector to "Emissions test"
(illuminated signal ring as status indicator flashes yellow.)
- Ensure that the boiler is not limited electronically
- Check the CO content at full load, and compare the actual
2
values with those in the table below
- Correct the CO adjustment (if required) using the gas flow
2
adjusting screw on the gas combination valve in accordance
with the table
Seal the front casing tightly with screws after
completing the service. There is a risk of carbon
monoxide poisoning if the flue system is faulty.
- turn clockwise - lowers CO
- turn anti-clockwise - raises CO
Appliance open
at upper load
Natural gas H
8.6% ± 0.2%
- Terminate the emissions test mode by turning the
temperature selector back into its original position.
32
CO adjustments
2
tester into the "Flue gas"
2
content
2
content
2
LPG P
10.1% ± 0.2%
Screws
Figure: Undoing screws
Figure: Gas combination valve
Figure: Flue gas test with an open boiler
Gas flow
adjusting
screw
Test port
"Flue gas"
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