Firing Rates; Test Boiler - Baxi TECNO 28-L Instrucciones De Instalación, Funcionamiento Y Mantenimiento

TECNO 28-L
TECNO 38-L
TECNO 50-L
(A)
(B)
FIRING RATES (A)
The TECNO 28-L, 38-L and 50-L model burners
can work in two ways: one-stage and two-stage.
1st stage DELIVERY must be selected within
area A of the adjacent diagrams.
2nd stage DELIVERY must be selected within
area B (and C for model TECNO 50-L). This
area provides the maximum delivery of the
burner in relation to the pressure in the combus-
tion chamber.
The work point may be found by plotting a verti-
cal line from the desired delivery and a horizon-
tal line from the pressure in the combustion
chamber. The intersection of these two lines is
the work point which must lie within area B.
In order to utilize also area C (TECNO 50-L) it is
necessary to perform the calibration of the com-
bustion head as explained on page 5.
Important
The FIRING RATE area values have been ob-
tained considering a surrounding temperature of
20 °C, and an atmospheric pressure of 1000
mbar (approx. 100 m above sea level) and with
the combustion head adjusted as shown on page
6.
TEST BOILER (B)
The firing rate was set in relation to special test
boilers in accordance with the methods defined
in EN 267 standards.
Figure (B) indicates the diameter and length of
the test combustion chamber.
Example:
delivery 35 kg/hour:
diameter = 50 cm; length = 1,5 m.
Whenever the burner is operated in a much small-
er commercially-available combustion chamber,
a preliminary test should be performed.
D453
D454
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