STARTING UP AND REGULATION
GENERAL WARNINGS
•
Bleed out the air contained in the gas piping, with due precautions
and with doors and windows open.
• Wait the time necessary for the gas in the room to disperse outsi-
de. Re-connect the burner to the gas pipeline.
• Make sure that the mains voltage corresponds to the manufactu-
rer's requirements and that all electrical connections made at the
installation site are effected properly as illustrated in our wiring
diagram.
• Check that there is water in the boiler and that the gate valves of
the system are open.
• Make sure that the combustion products may be freely vented
through the boiler and flue dampers.
• Make sure that the combustion head is long enough to enter the
furnace following the measure specified by the boiler manufactu
-
rer.
BURNER OPERATION PHASES:
• Install a pressure gauge with adequate scale on the pressure
outlet of the gas pressure switch.
• Now switch on the main switch. This powers on the control devi-
ce, and the programmer turns on the burner as described in the
chapter "Operation description". For burner adjustment, refer to
the instructions for the electronic cam supplied.
• After having adjusted the “minimum”, (200) turn the burner gra-
dually to maximum, by using the controls on the electronic cam
keyboard.
• Check combustion (CO, O2, NOx) using the appropriate instru-
ment at all intermediate points on the modulation route (from 200
to 999), checking the gas flow rate by reading the meter.
• Now check the proper automatic operation of modulation. This
ensures that the equipment receives the signal from the electronic
modulation regulator, if the burner is the modulating model, or
from the second stage thermostat or pressure switch, if it is a two
stage progressive burner.
The air pressure switch stops the equipment operation if air pressure
is not at the expected value.
The pressure switch must therefore be adjusted so that it is triggered
to close the NO (normally open) contact when the air pressure in the
burner reaches the set value.
If the air pressure switch does not detect a pressure greater than that
calibrated, the equipment runs through its cycle but does not switch on
the ignition transformer and does not open the gas valves and so the
burner “locks-out”.
To ensure the air pressure switch correct operation, with burner at the
minimum output, increase the adjustment value until reaching the trig-
gering value which must be followed by the immediate burner lock-out.
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