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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
7 Display and operating unit AZL5...
13.08.2004
The following section covers the parameter settings of the curves used by the basic unit
module «Fuel / air ratio control».
S e l e c t i o n m e n u « R a t i o c o n t r o l »
The selection menu looks as follows:
S
e t t i n
g
s G
a
s
1)
S
e t t i n
g
s O
i l
2)
A u t o m / M a n u a l / O f f
3)
T
i
m
e
s
4)
N u m F u e l A c t u a t o r s
5)
S h u t d o w n B e h a v
6)
P r o g r a m S t o p
7)
Selection of 3) through 6) leads to standard parameter settings of the parameters speci-
fied.
Selection of 1) leads to:
S e l e c t i o n m e n u « S e t t i n g s g a s »
Only the data associated with the currently active type of fuel can be parameterized.
S p e c i a l P o s i t i o n s
1)
C
u
r
v
e P
a
r
a
m
2)
L
o
a
d L i
m
i t s
3)
A
u
x
A
c t
u
a t
o
r
4)
Calling up 1) (
HomePositions, PrepurgePositions
...), 3) and 4) leads to standard pa-
rameter settings of the parameters specified.
Selection of 2) leads to:
S e l e c t i o n m e n u « C u r v e P a r a m » ( m o d u l a t i n g )
P o i n t | L o a d : 2 3 . 2
: 1 | F u e l : 2 3 . 2
M a n | A i r : 4 1 . 6
|
A
u
x : 3
3 . 3
I
A
u
x 2 : 2
9 . 2
only LMV52...
I
A
u
x 3 : 1
3 . 8
only LMV52...
I F
U : 4
5 . 0
only LMV52...
In this example, the ignition positions are copied to the first point of the curve.
This is always made automatically when the ignition positions are defined but no point
on the curve has as yet been entered. The preliminary load value entered is the position
value of the fuel actuator.
This point is also automatically approached as the low-fire point.
If the installer attempts to reach submenu «Curve parameter settings» before the igni-
tion positions are defined, point number «1» appears. But the position fields display
«XXXX», indicating that the data are
invalid
.
When making the parameter settings, the installer is guided, starting with entry of the ig-
nition positions and coarse adjustment of the low- and high-fire positions to fine adjust-
ment of the curve settings with up to 15 curvepoints.
This setting of the curve can be made in 2 different ways:
1. Individual points are specifically entered.
2. Ratio control is operated manually until the value reached shall be stored as a new
point.
Special function
curve settings FARC
