11
Pelletti XL
Maintenance
Check regularly that the system is filled with water. If you have to add water permanently it
indicates availability of leakage in the system, which should be eliminated as soon as possible.
Permanent adding of fresh water leads to heating system corrosion as fresh water contains air
(oxygen).
The hot system pressure should be lower than 1.5 bar and the cold system pressure higher than
0.5 bar. Water volume changes depending on temperature - the higher the temperature, the big-
ger is the volume and pressure. Task of the expansion tank is to compensate volume changes.
Preliminary pressure of the expansion tank shall be checked once in several years.
Safety valves shall be checked at least 2 times a year by handle/ lever turning to prevent their
sticking. Add water to the system after the check.
In order to prevent corrosion observe that temperature in the boiler during pellet burning is 70ºC
at least.
Remove ash from the furnace.
Clean the burner as per instructions of the burner manufacturer.
Cleaning
Keeping a daily watch on the burning process
in the boiler and making necessary adjust-
ments make the cleaning process a problem
free and infrequent job. Good burning forms a
thin grey or coffee colored layer on the firing
surfaces of the boiler, which falls off itself.
Poor burning forms a dirty layer of soot, ash-
es, and tar on the firing surfaces and inside
the flue. This prevents thermal energy from
transferring to water thus increasing the flue
gas temperature and lowering the efficiency.
Cleaning is performed through front hatches
and also rear hatch in the following way:
1.
Disconnect convection part cleanout
opening on top of the boiler and clean the
gaps between flue gas turbulators. After
that place turbulators close to each other
raising them simultaneously up approxi-
mately to 5 cm. At first install plates to-
gether to the rear end and clean the front
plate, and also boiler surface and heat
transfer plate. After that shift the plates to
the front end and clean the rear plate, and
boiler surface and heat transfer plate.
Place turbulators on their places after
cleaning. Check that clearance between
the upper level of the front turbulator and
front wall of the channel is approximately
10 mm. Close thoroughly convection part
cleanout opening
2.
Disconnect burner and clean it as per the
burner manufacturer's instructions (see re-
spective instructions).
3.
Remove the turbulator from the upper part
of the furnace. Clean fired surfaces of the
furnace with metal brush and remove ash
from the chest. Remove by scraper ash
from the bottom of convection part
cleanout opening.
4.
Install ash chest and the furnace turbulator
onto their places and close thoroughly the
burner hatch. Close hatch hook by reten-
tion screw, which prevents accidental
hatch opening.
5.
Install the burner and check correctness of
its functioning.
