Eng. Edition 1.0 2004, Nov.
6
Boiler
Check the condition of the boiler to avoid that unexpected operational troubles
will occur in the future.
Exhaust valves, if any, shall be fully open. All doors and exhaust connections on
the boiler shall be tight.
It is important that the fire place is big enough, so that the flame will not be in
contact with water-cooled walls. The burner’s capacity must conform to the size
of the boiler. The fireplace, where the burner is mounted, must be dimensioned
for the output of the burner. In so called combi-boilers, the fireplaces for oil and
wood can be dimensioned for different maximum output. There must be enough
space for the ash. The exhaust channels must be wide enough not to be easily
plugged with ash.
The distance between the upper edge of the pellets burner’s combustion
chamber tube and the fireplace roof must be at least 50 mm. As general the
distance between the front edge of the burner and the rear fireplace wall should
be 300 mm, which however can often be reduced to 200 mm. The important
thing is that the flames from the combustion chamber tube never reach the boiler
wall. The minimum distance to the bottom of the fireplace depends on the boiler
design. There must be enough space for the quantity of ash that is created during
at least one week use in wintertime.
The directions above are general for most installations. If you are not familiar
with the boiler type in question or not sure about any other detail, please contact
the authorized PellX dealer for more information. In some cases smaller
modifications of e.g. the boiler might be required for a proper function of the
installation.
Chimney
We recommend you to have the local sweep make an inspection and give advice
and instructions about measurements, which might be necessary for the chimney
and the exhaust pipe connections.
The following has to be considered before and after operation start of the plant:
•
The burner is adjusted to a chimney draft of 15-20 Pa. If the depression is
too much, a draft regulator has to be fitted. As a draft regulator is an
advantage also in other respects, we recommend it also in cases of normal
depression; see the chapter
Draft regulator
under
2.2 Mounting
.
