6
Pelletti XL
Installation
Requirements of local control authorities shall
be met.
The boiler is installed directly onto a solid
even base. 4 adjustable legs are delivered in
assembly with the boiler.
Boiler Room
There should be sufficient space for pellet
burner and boiler maintenance operations.
For cleaning of convection part located in the
boiler rear part there should be access to the
boiler rear and space over convection part
cleanout opening, at least 800 mm.
It is important from fire safety point that boil-
er-room is clean and non-dusty.
Flammable substances shall not be stored in
the boiler-room. The door to the boiler-room
shall be kept closed.
Air required for burning shall be supplied
from outside and area of the channel or valve
shall be at least 1.5 more than stack flue
cross-section.
Stack
Round stack diameter shall be 150 mm, and
for brick-lined stack - ≈ 250 cm
2
.
Boiler draft requirement depending on capaci-
ty is 10-15 Pa.
Stack height shall be sufficient so that flue
gases do not cause problems for surrounding
buildings.
Recommended height is 5 m minimum.
Piping Installation
It is recommended to connect the boiler to
energy accumulator with volume of 500 –
1,500 l.
It is recommended to build in 3 thermometers:
in lower, medium and upper parts.
For easier filling and drainage of the system
connections of the boiler, accumulator and
heating networks shall be equipped with stop
valves.
The boiler shall have at least one safety
valve 1”/1.5 bar.
For operation confirmation
it is recommended to use two safety valves
with unit blow capacity complying with re-
quired blow capacity.
Safety valve blow pipe shall be retracted to
drain pit so that overflowing could be seen
and steam potentially escaping from the pipe
could not result in danger for people and
property.
The volume of the membrane expansion tank
should be at least 5 % of the entire water
space in the system. In practice tank volume
is approximately 10 % of total volume if pre-
liminary pressure of 0.5 bar in the tank is suf-
ficient.
Piping should be installed to ensure that boiler
operation, maintenance, and cleaning are un-
obstructed.
