14) The equipment will set to the minimum load position P1.
Perform the flue combustion analysis, making sure that the O2
parameters fall within the values indicated in the manual, and
also perform the CO analysis checking that there are no unburnt
substances.
The possible adjustment of the gas quantity must be carried out
by acting on the minimum pressure adjustment screw (offset).
15) Once the correct operation at minimum power has been verified,
act on the maximum-minimum switch by moving the selector to
the maximum position.
16) Repeat the combustion analysis in the maximum position, veri-
fying that they fall within the parameters indicated in the booklet.
This check is performed again as the offset adjustment can
significantly modify the maximum load calibration.
17) Act on the maximum-minimum switch bringing the selector to the
minimum position first and then to 0 to cause the burner to stop.
18) Set the selector back to the minimum position, waiting for the
burner to run the ignition cycle and set to the P0 position. Perform
the flue combustion analysis, at the ignition load, making sure that
the O2 parameters fall within the values indicated in the manual.
To obtain an optimal adjustment of the burner it is necessary to perform
the analysis of the combustion exhaust gases at the generator outlet in
the following conditions:
• Maximum power
• Minimum power
• Ignition
When the valve is not optimally adjusted, the burner may not be able
to pass from the P1 to P2 point but sets to lockout mode. In this case
the manual modulation procedure must be performed, gradually incre-
asing the power through the minimum-maximum switch and verifying
the combustion at intermediate loads.
AUTOMATIC OPERATION
During automatic operation the burner adjustment is entrusted to
an external regulator which, based on the heat demand, adjusts the
power supplied by the burner.
Once the first start-up is completed and the burner is stopped (thermo
-
static chain opening T1-T2), proceed as follows to switch to automatic
operation:
1. Make sure that the burner is not electrically powered by discon-
necting the multipolar plug X1S.
2. Disconnect the minimum-maximum switch used for the first start-
up
3. Connect the external modulation control, which can be of the
following types:
• three-point control (multipolar plug X2B)
• analogue signal 010V or 4-20 mA (connector X65 on the equip-
ment)
4. Connect the multipolar plug X1S again ensuring that the equip-
ment is powered and that the thermostatic chain T1-T2 is properly
connected.
During burner operation in automatic mode, the display of the equip-
ment shows "oP:", which means modulating operation.
The display after "oP:" indicates the speed percentage value.
The speed corresponding to 100% is that of point P2 (maximum spe-
ed).
GAS CONTROL PRESSURE SWITCHES
The gas train is equipped with a minimum gas pressure switch (except
for the BPM 90 - 140 models).
The minimum value pressure switch makes use of the NO (normal-
ly open) contact which is closed when the pressure switch detects a
pressure higher than its own setting.
The triggering (opening of the circuit) of any of the pressure switches
when the burner is running (flame on) locks out the burner immediately.
ENGLISH
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Summary of Contents for BPM 10
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