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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 control unit is not fed, check:
A control unit connections
B
main switch
C adjusting thermostat
D priority thermostat
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After a few seconds the gas will start exiting from the main burner, and, at the same time, the igniter will
set the spark. Check that the spark is long about 5 mm and that sets between the electrode and the gas
outlet cuts on the burner . 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 still remains 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.
-
Shut off the boiler turning the main switch. Unscrew the pressure screw downstream of the gas valve.
Move the manometer on the pressure intake downstream. Tighten the inlet pressure intake screw. Ignite by
turning the main switch. Check that the gas pressure to the burner is as indicated in the technical data
table (maximum value). If not, remove the pressure regulator plug and adjust the pressure to the indicated
value. Screw the pressure regulator plug again.
-
Set the priority thermostat to minimum, set the summer/winter switch on winter (ensure that clock and
room thermostat are closed) and wait that heating lamp is on. In this way the hot water priority thermostat
operation is controlled.
-
Shut off the burner turning the main switch. Wait at least 30 seconds. Ignite the burner again and check
for slow ignition. Disconnect the manometer and tighten the downstream pressure intake screw accurately.
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
