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HOW TO FIND THE CAUSES OF IMPROPER WORKING AND HOW TO RECTIFY THEM
TYPe Of irregULariTY
The burner does not start.
(the appliance does not perform the
ignition program)
Defective flame with sparks.
flame badly shaped with smoke and
soot
Defective pulsating escaping flame or
receding from the combustion orifice
Corrosion inside the boiler
soot at the chimney exit.
POssiBLe CaUse
1) Thermostats (boiler/room) or pressure
switches open
2) photoresistant-cell in short circuit
3) No voltage with an open isolating switch or
with a tripped max. contactor switch or line
voltage failure
4) Thermostat line not wired according to dia-
gram or open thermostats
5) Internal fault in appliance
1) Atomizing pressure too low
2) Too much combustion air
3) Nozzle inefficient because dirty or worn
4) Water in the fuel
1) Insufficient combustion air flow
2) Nozzle inefficient because dirty or worn
3) Combustion chamber unsuitably designed
or too small
4) Nozzle flow insufficient for volume of com-
bustion chamber
5) Unsuitable refractory coating (excessive
reduction in gap for flame)
6) Boiler or chimney ducts clogged
7) Atomisation pressure too low
1) Excessive draft (only if there is a suction
unit to the chimney)
2) Nozzle inefficient because dirty or worn
3) Water in the fuel
4) Dirty disk
5) Excess combustion air
6) Air passage between disk and blast tube
1) Boiler operating temperature too low (lower
than the dew point)
2) high sulphur content in the fuel Smoke tem-
perature too low (below 180 °C)
1) Excessive cooling (below 180°C) of smoke
before exit outflow, for an outside chimney
not adequately heat insulated or cold air
infiltration.
22 / 30
0006160034_201307
sOLUTiOn
1) Increase their value or wait until they
activate due to natural reduction of the tem-
perature or pressure
2) Replace it
3) Activate switches or wait for power to return
4) Check connections and thermostats
5) Replace it
1) Reset to correct value
2) Reduce combustion air flow
3) Clean or replace it
4) Remove it from the tank using a suitable
pump (never use the burner pump for this
job)
(Never use the burner pump for this job)
1) Increase combustion air
2) Clean or replace it
3) Reduce the nozzle delivery rate to suit the
combustion chamber capacity or replace the
boiler
4) Increase nozzle flow by replacing
5) Modify ensuring that the instructions of the
boiler manufacturer are carefully followed
6) Clean them
7) Reset to the correct value
1) Adjust the suction fan speed by changing
the pulley diameter
2) Clean or replace it
3) Remove it from the tank with a suitable
pump (never use the burner pump for this
job)
4) Clean it
5) Reduce combustion air
6) Rectify the position of the blast tube
1) Increase the operating temperature
2) Change grade of fuel
1) Improve insulation and close any gap letting
cold air in.
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