20095002
38
GB
Start-up, calibration and operation of the burner
6.7
Parameter modification procedure
After accessing the level and group of parameters, the display
visualises the number of the parameter (flashing) on the left, and
the corresponding value on the right.
If the value is not visualised, press the key
“i/reset”
for 1 - 3
seconds.
An example of how to modify the parameter relating to
pre-
purging time
(no.225) is given below.
Press the key
“i/reset”
: the value
20
(seconds) will appear.
NOTE:
The unit of measurement of the time is not visualised but is un-
derstood in seconds.
Press the key
“+“
and increase the value to
25
seconds (flash-
ing). Press the key
“i/reset”
to confirm and store.
To return to the list of parameters, press the keys
“+“
and
“-”
(
ESC
) simultaneously.
6.7.1
Procedure for inserting and adjusting points
on the modulation curve
Nine adjustment/calibration points (P1 ÷ P9) can be inserted in
the control box for each servomotor, varying their position by de-
grees and, consequently, the quantity of air and fuel introduced.
The
ignition point P0
is independent of the minimum modulation
value. This means that, in the event of difficulty, it is possible to
switch on the burner at a value other than the modulation mini-
mum (
P1
).
To access the
Parameter mode
(group 400) referring to the
"Ac-
cess procedure with password"
on page 37.
To insert or adjust a point, proceed as follows.
Using the keys
“+”
and
“-”
insert/select the curve point you want
and wait for it to flash: this means that the servomotors are now
positioned on the values shown on the display and which corre-
spond to the point previously set.
It is now possible to insert/modify the position by degrees.
For the fuel servomotor, keep the key
“F”
pressed (the position
in degrees flashes) and press the keys
“+”
or
“-”
to increase or
decrease the value.
For the air servomotor, keep the key
“A”
pressed (the position in
degrees flashes) and press the keys
“+”
or
“-”
to increase or de-
crease the value.
To adjust the speed of the inverter (expressed in
%
and that is
50
Hz = 100 %
), keep the buttons
“F”
and
“A”
simultaneously
pressed, the percentage position blinks and press buttons
“+”
or
“-”
to increase or decrease the value.
Select another point, or exit this area by pressing the keys
“+”
and
“-”
(
ESC
) simultaneously.
D90
2
8
P
%
s
min
h
/reset
D9029
h min s
%
V
P
D9030
P
V
%
s
h mi
/reset
D9031
P
%
s
h min
ESC
WARNING
Il valore impostato non necessita di conferma.
D90
3
2
P
min
h
s
%
V
D9033
P
s
%
F
D
9
034
P
V
min
h
A
D12135
h min
%
P
V
VSD
A
F
ESC
