Siemens LMV51 Series - Page 284

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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 19 Addendum 4: LMV52... with O2 trim control and O2 module 13.08.2004
19.11.3 Direct entry of O2 min. values
If the limit values of a plant are known, and if the CO limit need not be remeasured, the
O2 min. values can be entered directly.
P o i n t : 2
O 2 - M i n V a l u e : 1 . 2
P - A i r M a n : 0 . 0
On the first line, «Point», select the point number to be changed and confirm with
Enter
(point 1 can be adjusted). With the second line, «O2 Min Value», the O2 min. value can
be directly parameterized. The points will only be approached if, previously, setting
choice «P-Air Man» has been used.
19.11.4 Measuring the O2 min. values by lowering the air rate
On the first line, select the point number and confirm with
Enter. Now, select line «P-Air
Man» and confirm. After confirmation with
Enter, the ratio control system approaches
this point on the parameterized ratio curve, that is, air rate reduction «P-Air Man» will
be set to «0». The display on the second line changes to «Actual O
2 Value», which will
then be displayed.
P o i n t : 3
A c t O 2 V a l u e : 1 . 4
P - A i r M a n : 2 1 . 3
By readjusting the air rate «P-Air Man», the amount of combustion air and thus the O2
value can be reduced. «P-Air Man» corresponds to the relative air rate reduction. Dur-
ing the readjustment, all actuators on the curve parameterized as air-influencing will
travel to the relevant positions. When the O
2 min. value is found, the measured «Actual
O
2 Value» will be entered as the «O2 Min Value» by pressing Enter.