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3) if the fan is not rotating, check that it is fed
4) if the fan is fed, replace the fan
5) if the fan is not supplied, check the ionisation control unit feeding
6) if the control unit is fed, check the fuse; if it is in good working order, replace the control unit
7) if the unit is not fed, check:
A unit connections
B main switch
C adjusting thermostat
- The fan pilot lamp lights up, after a few seconds the gas starts exiting from the main burner, and the igniter
sets the spark. After 10 seconds maximum, the igniter stops and the main burner remains on. If the main
burner does not ignite with the spark, make sure that:
1) the gas plant has completely bled
2) voltage is supplied to the gas valve
- If the burner ignites but the spark is still on and after a few seconds the ionisation control unit locks out,
make sure that:
1) phase is connected to terminal 1 and neutral is connected to terminal 2 of the control panel
2) the ionisation electrode does not discharge to earth due to ceramic rupture, or due to wrong position or
humidity
3) the plant earthing is correct and the earth wire connected to the burner is correctly fixed
- Move the manometer on the downstream pressure intake and tighten the upstream pressure intake screw.
- Adjust pressure by the pressure regulator screw according to the technical data table (page 9). Seal the
adjustment.
- Shut off the burner turning the main switch. Wait for at least 30 seconds. Ignite the burner again and check
for slow ignition (approximate values: 30 mm w.c. for methane, 40 for LPG). Disconnect the manometer and
tighten the downstream pressure intake screw carefully.
- Close the gas gate and wait for the control unit to lock out and the lock-out lamp and the control unit reset
pushbutton to light on.
- Open the gas gate, wait 10 seconds, reset the control unit pressing the reset pushbutton and check that all
control and ignition functions are correct.
ADJUSTMENTS
- Shut off the boiler turning the main switch. Remove the
pressure screw downstream, on the valve. Move the water
column manometer on the downstream pressure point.
Tighten the screw again on the inlet pressure point. Start
the main switch. Set the summer/winter switch to summer.
Check that gas pressure to the burner matches that stated
in the table (maximum value). If not, adjust by means of
the screw placed under the cap 3.
- Set the hot water potentiometer to minimum, the summer/
winter switch to winter (make sure that clock and room
thermostat are closed) and wait for the heating operation
lamp to light. Adjust screw 1 to the pressure value matching
the desired thermal output.
LEGEND:
1- solenoid valve
2- pressure point
3- burner gas adjustment
