20093868
54
GB
Start-up, calibration and operation of the burner
6.1
Notes on safety for the first start-up
6.2
Adjustments prior to ignition
The following adjustments must be carried out:
open the manual valves upline of the gas train;
bleed the air from the gas pipes using the screw on the socket
P1)(Fig. 21 on page 24).
Adjust the minimum gas pressure switch to the start of the
scale.
NOTE:
Make sure that the cover has been correctly installed on the
burner (the presence or otherwise of the cover considerably
affects the depression values measured at the pressure test
point downstream of the valve).
To access the display with cover installed, unscrew the screws
1)(Fig. 167) and remove the glass 2).
6.3
Fan adjustment
Modulation is based on variable-speed technology.
The combustion air flow rate can be regulated by varying the motor
speed (rpm).
The proportioning gas train delivers the right amount of fuel, de-
pending on the pressure detected in the purging circuit.
So the flow rate supplied is regulated by changing the rotation
speed of the motor.
The motor speed can be regulated through an adjustment of the
control box.
The adjustments take place on the AZL display on the burner and
are carried out using the following parameters:
START
ignition point (P0)
Parameter P 403.00
MIN
minimum point (P1)
Parameter P 403.01
MAX
maximum point (P2)
Parameter P 403.02
NOTE:
The adjustment of the fan (to establish the maximum, mini-
mum and ignition outputs) can occur independently both of
the AZL display and the keys and display on board the ma-
chine. Below is a description of the procedure to carry out us-
ing the AZL display since it allows you to work with the cover
installed (final configuration). Points P0, P1 and P2 can be
modified within the range defined by the limits set in the pa-
rameters 516, 517 and 518 respectively.
6.3.1
Pre-setting of the points P0 (ignition), P1
(minimum) and P2 (maximum)
The burner leaves the factory with a pre-setting of points P0, P1
and P2. Before starting the burner we recommend modifying these
point based on the maximum output of the boiler, the minimum out-
put desired and that of the ignition.
To set the points based on the desired outputs, see the charts on
page 10.
To modify the points P0, P1 and P2 with the burner off, proceed as
follows:
–
Electric voltage is available (indicator light “POWER ON” must
be on).
–
Turn the “ON/OFF” selector to “OFF”, standby (OFF).
Start the programming mode for the technician.
Keep the buttons “
A
” and “
F
” pressed simultaneously for
< 5 seconds. “
Code
” is displayed.
Entering the password of the technician (SO) using the but-
tons “+”, “-” and “
i/reset
”. See also chapter “
Entering the
password
” on page 43.
The displays shows
PArA
and then
400:Set
. Confirm by
pressing “
i/reset
”;
The display shows
run
;
Press simultaneously the keys “+” and “-” (ESC);
The display shows “
P0: 2000
” (for example 2000 rpm);
Change the value by pressing simultaneously the keys “A” and
“+” to increase the value or keys “A” and “-” to lower the value;
Confirm by pressing “i/reset”;
The display shows “
P1: 1200
” (for example 1200 rpm);
Change the value by pressing simultaneously the keys “A” and
“+” to increase the value or keys “A” and “-” to lower the value;
Confirm by pressing “
i/reset
”;
6
Start-up, calibration and operation of the burner
WARNING
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
Check the correct working of the adjustment, com-
mand and safety devices.
1
2
20115660
Fig. 167
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