20093868
56
GB
Start-up, calibration and operation of the burner
NOTE:
To go back to manual mode it is necessary to turn the “ON/
OFF” selector to “OFF” and repeat the first start-up sequence
with the technician programming mode. If the selector re-
mains on “ON” the burner restarts in automatic mode (it nor-
mally carries out all the ignition phases without stopping, at
the end of the pre-purging time, at point P0).
Turn the screw V1 towards the “+” sign (Fig. 170 at page 57).
The burner is ignited, the program continues to the minimum
load position
P1
. On the left is displayed P1 blinking, on the
right the current rpm.
keeping button “
A
” pressed (the display passes to
1A
and the
rpm is indicated blinking) and pressing the button “+” or “-”, it is
possible to modify the rpm number of 10 rpm within the limits
pre-set by the OEM (Parameter P403.01).
Check the appearance of the flame, if possible, or the value of
the CO and CO
2
to understand whether the burner has been
sufficiently calibrated (first maximum calibration). If necessary
use the screw V2 of the gas valve (turn towards the “+” sign to
increase the gas, towards the “-” sign to decrease the gas)
(Fig. 170 at page 57).
NOTE:
After the control box has remained in the same setting phase
for some time (example point P1), the display exits from the
regulation of the number of revs. To re-enter it is necessary to
carry out the procedure with access using the technician's
password (SO).
With the button “
i/reset
” the setting value is confirmed in the
internal memory.
oP:
P1
is displayed quickly. The fan rpm passes to the value
for the nominal load
P2
. On the left is displayed
P2
blinking,
on the right the current rpm.
Keeping button “
A
” pressed (the display passes to
2A
and the
rpm is indicated blinking) and pressing the button “+” or “-”, it is
possible to modify the rpm number of 10 rpm within the limits
pre-set by the OEM (Parameter P403.02).
Check the appearance of the flame, if possible, or the value of
the CO and CO
2
to understand whether the burner has been
sufficiently calibrated (first maximum calibration). If necessary
use the screw V1 of the gas valve (turn towards the “+” sign to
increase the gas, towards the “-” sign to decrease the gas)
(Fig. 170 at page 57).
With the button “
i/reset
” the setting value is confirmed in the
internal memory.
From here the speeds of the low flame
P1
or the high flame
P2
can be changed as described above, or else it is possible to
end the setting process and pit the burner in automatic mode
by pressing several times “
ESC
” (press “+” or “-” and contem-
Connect the external modulation control (control with 3 points
or analogue signal). In the automatic operation position the
output requisites of the external load regulator are valid.
NOTE:
To memorise the settings in the PME... program module it is
necessary to carry out a manual backup. See “Backup” on
page 45.
6.4.2
Checking the modulating operation (automatic
operation)
–
Electric voltage is available (indicator light
“POWER ON”
must
be on).
–
Turn the
“ON/OFF”
selector to
“ON”
.
–
Make sure that the external modulation control (control with 3
points or analogue signal) is connected and working correctly.
NOTE:
When the burner is operating the AZL display shows “oP:”
meaning modulating operation. The display after “oP:” indi-
cates the value in percentage of the speed. The speed corre-
sponding to 100% is that of point P2 (maximum speed).
To calculate approximately the number of fan revolutions from the
percentage “
oP
” it is necessary to multiply the speed set at point
P2 by the percentage read (for example, with P2=6000rpm and
oP
=20% the speed of the fan is about 1200rpm).
If the speed set at point
P2
is modified (to lower the burner output,
for example) also the current value, equal to “
oP
”, is modified (e.g..
P2=5000 rpm and oP=20% the fan speed is about 1000 rpm).
WARNING
Eventual modifications to the parameters and the
settings should be set and saved in the memory on-
board the unit.
To save the modified settings of the PME7... pro-
gram module, the backup should be activated man-
ually. If this is not respected you risk losing the
safety functions.
WARNING
At the first start-up, or else after replacing the pro-
gram module, it is necessary to check, immediately
after the reset process, the sequence of the func-
tions and the settings of the parameters. If thisis not
respected you risk losing the safety functions.
WARNING
If the parameters have been changed, you need to
make a backup! If this is not respected you risk los-
ing the safety functions.
WARNING
Before setting the burner in modulating operation
carry out the procedure of “Pre-setting the points P0
(ignition), P1 (minimum) and P2 (maximum)” (Para-
graph 6.3.1 on page 54) and of “First burner start-
up” (Paragraph 6.4.1 on page 55).
