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4.6
Maximum dimensions
The maximum dimensions of the burner are shown in Fig. 1.
Note that to inspect the combustion head the burner must be
moved backward and turned upward.
mm
A
RS 55/E BLU
533
Blast tube: short-long
(1)
4.7
Firing rate
The maximum output is chosen from within the diagram area
(Fig. 2).
The minimum output must not be lower than the minimum limit
of the diagram.
4.7.1
Firing rate based on the air density
The firing rate of the burner shown in the manual is valid for an
ambient temperature of 20 °C and an altitude of 0m above sea
level (barometric pressure around 1013 mbar).
It may be that a burner has to operate with combustion air at a
higher temperature and/or higher altitudes.
The heating of the air and the increase in altitude produce the
same effect: the expansion of the air volume (i.e. the reduction of
its density).
Technical description of the burner
L
N
E
O
D3906
B
D
E
300
490
640
255 - 390
Thermal power
The maximum dimension of the burner, without casing, when
open is given by measurement H.
F
F
H
I
(1)
189
352
The firing rate value (Fig. 2) has been obtained
considering an ambient temperature of 20 °C, an
atmospheric pressure of 1013 mbar (approx. 0 m
a.s.l.), and with the combustion head adjusted as
WARNING
shown on page 19.
The delivery of the burner fan remains essentially the same, but
3
the oxygen per m
of air, and the thrust (discharge head) of the
fan are reduced.
It is therefore important to know if the maximum output requested
from the burner at a determinate combustion chamber pressure
remains within the firing rate of the burner even with the changed
temperature and altitude conditions.
9
GB
A
B
L
O
N
222
870
134
D11603
Fig. 1
V
M
221
2"
Tab. D
Fig. 2
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