Siemens LMV5 Series Basic Documentation page 266
Burner control with integrated fuel / air ratio control, burner control with load control and oxygen trim control for forced-draft burners
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18.11.5 Setting O
Since with O
trim control activated, the O
2
monitor should already be set. For the initial setting, O
deactivated, and the O
2
both ratio control and the loads of the curvepoints should be correctly set. This
facilitates correct functioning of precontrol.
Also refer to subsection 18.11.1 Setting ratio control .
If the ratio curves are changed later, O
It is important to make all settings of the O
conditions do not change. For this reason, when making corrections later, all points
must be set again. When setting O
necessary setting steps.
First, select the desired curvepoint and confirm with ENTER (point 1 cannot be set
since O
trim control does not approach any load below point 2). The system
2
approaches the selected point on the ratio curve.
P
u
n
k
t
O
2
-
V
e
O
2
-
S
o
N
o
r
m
i
The display will change. During this step, the system acquires the O
curve. The actual O
value is displayed and the operator is prompted to confirm when a
2
stable O
value has been reached. This is important since the value is used for
2
calculating precontrol. In the future, the PC tool will be useful for making checks.
P
u
n
k
t
O
2
-
V
e
W
e
n
n
w
e
i
t
e
Then, the measured O
2
standardized value. By changing this value, the relative amount of air will be reduced,
whereby the standardized value corresponds to the relative air rate reduction. The
standardized value is only changed until the actual O
setpoint, which is then displayed. The setting may only be confirmed after a constant
O
value has been attained. The PC tool will be useful for making checks.
2
P
u
n
k
t
O
2
-
V
e
O
2
-
I
s
N
o
r
m
i
Now, the operator must decide whether he wants to adopt or reject the settings.
Basic Documentation LMV51...
18 Addendum 4: LMV52... with O2 trim control and O2 module
2
trim control
monitor is always active also, the O
2
monitor can be activated. Prior to setting the O
trim control must also be readjusted.
2
trim controller when environmental
2
trim control, the user is guided through the
2
:
2
r
b
u
n
d
l
l
w
e
r
e
r
w
e
r
:
2
r
b
u
n
d
W
e
r
t
r
m
i
t
ratio value will be displayed. The cursor now indicates the
:
2
r
b
u
n
d
t
w
e
r
t
e
r
w
e
r
trim control should remain
2
2
:
x
x
x
t
:
x
x
x
t
:
x
x
x
value on the ratio
2
:
5
.
s
t
a
b
i
E
N
T
E
R
value reaches the required O
2
:
5
.
:
2
.
t
:
1
5
.
2
trim controller,
x
x
x
4
l
2
2
0
3
CC1P7550en
01.10.2003
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