10
To maintain efficient and safe operation of your boiler have it checked by a Qualified Service En-
gineer at the end of every operating period. Careful servicing will ensure economical operation of
the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily flammable
cleaners (i.e.: gasoline, alcohol, and so on). Always isolate the electrical supply to the appliance
before cleaning it (see section 5 Turning off the boiler).
These boilers produced for natural gas can be converted to work with LPG.
Any gas change be effected by a Qualified Service Engineer.
7. Servicing instructions
and gas change
To shut down the boiler switch off the electrical supply to the appliance.
5. Turning off the boiler
Important:
Regularly check that the pressure displayed by the pressure gauge is 1 to 1.5 bar, with
boiler not operating.
In case the pressure is lower open the boiler filling tap.
We recommend you open the tap very slowly in order to let off the air.
In case pressure drops occur frequently have the boiler checked by a Qualified Service Engineer.
4. Filling the boiler
6. Prolonged standstill of the
system. Frost protection
We recommend you avoid draining the whole system as water replacements engender purposeless
and harmful limestone deposits inside the boiler and on the heating elements.
In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we
suggest you add some specific-purpose anti-freeze to the water contained in the system (e.g.: propy-
lene glycole coupled with corrosion and scaling inhibitors).
The electronic management of boilers includes a ‘frost protection’ function which operates the bur-
ner to reach a heating flow temperature of 30° C when the system heating flow temperature drops
below 5°C.
The frost protection function is enabled if:
*
electrical supply to the boiler is on;
*
the gas service cock is open;
*
the system pressure is as required;
*
the boiler is not blocked.
