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Start-up, calibration and operation of the burner
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 techni-
cian'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. 168 on 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
contemporaneously).
Reset 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.
To memorise the settings in the PME... program module it is
necessary to carry out a manual backup. See “Backup” on
page 44.
7.5.2 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 correct-
ly.
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).
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
manually. If this is not respected you risk losing
the safety functions.
At the first start-up, or else after replacing the pro-
gram module, it is necessary to check, immediate-
ly after the reset process, the sequence of the
functions and the settings of the parameters. If
this is not respected you risk losing the safety
functions.
If the parameters have been changed, you need
to make a backup! If this is not respected you risk
losing the safety functions.
Before setting the burner in modulating operation
carry out the procedure of “Pre-setting the points
P0 (ignition), P1 (minimum) and P2 (maximum)”
(Paragraph 7.4 on page 53) and of “First burner
start-up” (Paragraph 7.5.1 on page 54).
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