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Verfügbare Sprachen
Verfügbare Sprachen
Adjusting the gas:air mixture
Carry out the adjustments in the following sequence:
NB
At the factory, the gas combination valve has been
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.
A) CO
adjustment at the upper load
2
(emissions test mode)
- Pivot the control unit lid down.
Unlock the casing lid with the l.h. and r.h. rotating locks.
Release the lower part of the casing lid and unhook at the
top.
- Remove the screw from the l.h. „Flue gas" test port.
- Insert the test probe of the CO
gas" test port.
- Turn the temperature selector to the emissions test position,
(illuminated status display ring flashes yellow).
- Check the CO
content at full load, and compare the actual
2
value with those in the table below.
- Pivot the control unit out and correct the CO
the gas flow adjusting screw on the gas combination valve
(in accordance with the table).
- Turn clockwise
- lower CO
- Turn anti-clockwise - higher CO
boiler open
at upper load
Natural gas H
8,8% ± 0,2%
- Terminate the emissions test mode by turning the tempera-
ture selector back into its original position.
3044826_201602
Service Manual
test equipment into the „Flue
2
content with
2
content
2
content
2
LPG P
9,9% ± 0,3%
Fig.: Open the rotating locks
Fig.: Gas combination valve
„Flue gas" test port
Fig.: Flue gas test with an open boiler
rotating lock
Gas flow adju-
sting screw
51
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