Lamtec CMS, Manual

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8 CO/O
2
Control
Deactivating CO control depending on the O
2
value
For a description, see chapter Optimising the CO Control
NOTICE
This function is only available via CMS Remote Software.
8.10.6 Checking the Combustion-related Limit Values
NOTICE
With O
2
trim is it essential to ensure that the burner burns safely and stably at maximum cor-
rectional intervention (0 % and 100 %), taking into account all environmental influences and
in every burner firing-rate range.
To do this, transverse the correction value both to 0 % and to 100
% at different firing-rate val-
ues (for CMS Remote Software see chapter Testing the Correction Effect ).
8.10.7 Set and Optimise the CO Response Threshold on LT3-F
The basis for CO regulation is a digital signal

CO greater/less than threshold value.
This signal is formed in the LT3-F and transferred to the burner controller via the LAMTEC
SYSTEM BUS (LSB).
1. Run the burner to a firing-rate between base fire and half fire.
2. Change the electronic ratio towards less air and/or more fuel (correction values

100%)
until the CO edge is detected; if necessary, increase the correctional range again.
Alternatively, you can keep it regulated at the CO edge. You must not change the firing-
rate for this purpose (MANUAL burner firing-rate controller). On the display of the CMS,
the signal dynamics must rise continuously.
NOTICE
If this display value of CMS reaches -32 in case of air reduction (display of Item 2 = – and Item
4 = 32) and +52 or +54 ( in case of air increase (display of Item 2 = + and Item 4 = 52 or 54),
the CO regulation has detected the CO edge and the optimisation point is saved.
Repeat at another firing-rate point.
Fig. 8-14 ’Settings’ menu in the LT3-F
Can only be set in access level 2!
CO
e
trigger threshold. Switching threshold of
the CO
e
detection for LAMTEC CO/O
2
regu-
lation. Evaluation of the signal dynamics.
Settable in a range from 0 ... 100 %.
Factory setting: 40 %
< 40% trim becomes more sensitive
> 40% trim becomes less sensitive