15
1.27
Checking the safety limit thermostat
− Unscrew the plug from the button
− Reset the button to eliminate the fault
1.28
Maintenance instructions
The boiler and burner checks are carried out: daily (daily use),
periodically and annually.
Daily checks
The user should carry out these checks daily in the season when
the boiler is used every day. Read and follow the instructions for
the daily checks in the chapter “Preliminary checks” pag. 14in
the manual.
Periodic checks
To operate efficiently, to prevent problems and to attain a long
boiler life, it is important to carry out periodic checks. We rec-
ommend these checks be carried out once every three months.
Periodic checks are carried out by the technicians as follows:
− Checking and cleaning, if necessary, of the combustion
chamber and the passageways of the boiler smoke.
− Checking for water leaks going into and coming out of the
boiler and the checking the flue gases pipe fitting seal.
− Checking the valves.
− Checking the pumps.
− Checking and cleaning, if necessary, the fuel filter.
− Checking the combustion (visual). Adjustments to the
burner and flame, if necessary.
− Checking and cleaning, if necessary, the liquid fuel sen-
sor.
− Checking the operation and safety of the burner and the
boiler.
Annual checks
The annual checks should be carried out by technicians before
the start of the season. The flue gases pipe and the relative pipes
need to be cleaned before requesting the intervention of tech-
nicians for the annual checks. In the annual checks, the techni-
cians assess the following:
− Conditions and sealing of the elements and the insulat-
ing cords.
− Operating pressure for adjusting the combustion with the
combustion gas measurement system, if necessary.
− Sensors and connection of the sensors.
− Boiler combustion chamber and any formations of soot
in the fume passages; cleaning after checking.
− Fastening and seal of the boiler door.
− Seals of the boiler fittings.
− Correct opening and closing of the valves.
− Fuel filter and eventual cleaning.
− Burner liquid sensor with cleaning or replacement.
− Operation and safety of the burner and the boiler.
1.29
Cleaning the boiler
Before carrying out this work on the boiler, switch off the electri-
cal supply with the master switch, close the fuel valves and pro-
tect the control panel and the burner so as not to damage them.
Cleaning the flue gas passages
The formation of soot on the heating surfaces can lead to an in-
crease in the temperature of the flue gases by up to 100° above
normal, leading to a yield reduction of 5%. Remove the M16
screws and the nuts from the four hinges that connect the burn-
er door to the front and then open the door. Clean the com-
bustion chamber, extract the turbulators and the horizontal flue
gas passages (second and third passage). Clean the turbulators
and put them back in the channels. Close the door of the burner
securely. During this cleaning operation, a layer of soot could
form in the flue gas outlet zone. The soot can be removed by
separating the horizontal passages from the flue pipe. After this
operation, put back the screws and check the door seal.
The frequency of the cleaning changes depending on the type of
fuel used by the boiler and the period it is used. When cleaning
the boiler check the ceramic fibre cords that insulate the door
from the front element and the flue gases pipe from the rear
element and replace them if necessary.
Cleaning the other surfaces and components
Painted surfaces can easily be cleaned with warm or cold soapy
water. Wipe the painted surfaces
with a soft cloth or a damp sponge.
The other surfaces and other components can be cleaned with a
soft cloth or a damp sponge.
