The grate with water circulation is made of a number of pipes who holdup the ash heat.
The space from the grate alows the ash to fall in the lower side of the boiler in the ash tray.
The burning control is made with the ventilator’s help which is comanded by a control
panel and a mechanism which works as a thermostat. When the water is still cold, it allows
the air enter through the draught door. As the water heats up in the boiler, the sensor
expands and closes the draught door. In this way the flame control is achieved by reducing
the burning air.
The adjustment of the secondary burning air is made by the manual draught cupboard .
The MULTIPLEX boiler series can operarte also with liquid fuel (black oil, oil, residue
oils) or gases as an alternative solution. For this purpose there is the posibility of mounting at
the boiler’s door of a special flange for adapting a burner.
In case that the boiler works mostly with liquid or gas fuels, a delay of the exhausts
must be made by using of special turbiolators or by mounting a drop shutter at the chimney at
the „closed” position.
For a better burning the boiler is provided with a rear ventilator, fastened under the
smoke box. The ventilator’s flange is conected with a slited pipe that crosses the rear plate
and the combustion chamber and which has an optimal length to ensure a better air intake.
The ventilator is controled by the control panel, and the conection of the ventilator is made by
simply conecting the conecting wires. The ventilator is fed with 220 V and has powers
between 60 and 200 W, ,blowing air between 450 and 1050 m
3
/h, depending on the boiler’s
power.
For a good function of the Multiplex boilers and a longer life period,
it is strictly
recomended the usage of dry wood with a humidity of maximum 20-25%
. The boiler
powers prezented in this document are calculated based on this kind of wood. It is known that
the wood caloric power decreases significantly with the increase of the humidity in conformity
with the graph below.
Green wood has a low caloric power, it doesn’t burn well, produecs a lot of smoke and
reduces substantially the life period of the boiler and of the chimney. Also the power
decreases with 50% and the wood consumption is doubled.
The fire wood must be
chopped from the logs in even pieces ,stored in a covered hall and dried at least one
year long before using it
.
In the boiler there will be used wood with the specific
maximum length for every boiler type mentioned in the technical book
.
You may burn timber offal of great dimensions combined with fire wood. It is
recommended that that these
offal’s should not exceed 15% from the combustion chamber
volume
.
