23
Tec
hnical f
eatures and dimensions
3.12.2 - INSTALLATION OF THE BURNER
The burner must be mounted to the door of the boiler guaran-
teeing perfect sealing of the combustion products.
The burner is supplied with
a piece of ceramic fibre cord which
must be placed on the blast tube of the burner to fully seal
the space between the blast tube and the slot in the door
.
Make sure that no gaps remain between the blast tube and the
slot on the refractory material inside the door.
3.12.1 - SELECTING THE BURNER
The correct choice and adjustment of the burner are fundamental
for optimal operation of the boiler and therefore must be done
carefully and not underestimated.
The burner must be chosen verifying that its firing rate (fuel
capacity - combustion chamber pressure) is compatible with the
same features declared for the boiler.
Remember that pressure drops on the flue side of the boiler,
namely combustion chamber counter pressure, refer to zero
pressure at the base of the chimney.
It is also recommended that the burner blast tube be no shorter
than the minimum dimension shown in the following table and
that the flame which must be implemented be suitable for the
characteristics of the combustion chamber.
The manufacturing companies of the burners can supply the
dimensions of the flames which their appliances develop, espe-
cially those approved based on the standards indicated above.
Should a cone larger than the diameter of the blast tube be
mounted, it must be removed before mounting the burner on
the support plate and put back afterwards.
With the burner mounted, check that the flexible hoses of the
liquid fuel and the electric cables are long enough to allow the
door to open 90°.
For gas-fired burners, flexible hoses cannot be used for connec-
tions. Therefore it must be equipped with a threaded or flanged
joint for disconnecting the final section of the gas adduction tube.
3.12.3 - CONNECTING FLAME CONTROL
WARNING LIGHT TO BURNER
The flame control warning light is supplied with a threaded 1/8”
connection with a 9mm pressure test nipple mounted on it, to
be used with a silicone tube to measure back pressure in the
combustion chamber.
In place of this test nipple, which must be kept, an appropriate
fitting will be mounted to connect the flame control warning light
directly to the pressure chamber downstream the burner fan by
means of a copper tube.
The air blown by the fan will conveniently cool the warning light
glass and keep it from blackening.
If the cooling tube is not connected to the warning light, it could
break.
TERNOx
øA
mm
L
mm (min)
2500
3500
4500
5800
7000
8500
10200
12500
15000
400
400
500
500
500
500
500
650
650
370
370
410
410
410
450
450
450
450
DIMENSIONS OF BURNER BLAST TUBE
L
Ø
A
L
mm (max)
ATTENTION: the flame control warning light
can be very hot; therefore pay the utmost
attention.
520
520
560
560
560
650
650
650
650
