Firing Rates (Fig. 3) - Baxi TECNO 70-L Installation, Use And Maintenance Instructions

3.4

Firing rates (Fig. 3)

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Technical description of the burner
D3314
Fig. 3
8 GB
The TECNO 70-L - 100 L - 130 L burners model can work in two
ways: one-stage and two-stage.
1st stage DELIVERY must be selected within area A of the ad-
jacent diagrams.
2nd stage DELIVERY must be selected within area B (and C for
model TECNO 130-L). This area provides the maximum delivery
of the burner in relation to the pressure in the combustion cham-
ber.
The work point may be found by plotting a vertical line from the
desired delivery and a horizontal 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 130-L) it is necessary to
perform the calibration of the combustion head as explained on
pag. 10.
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
WARNING
combustion head adjusted as shown on pag. 13.
3.4.1 Test boiler (Fig. 4)
The firing rates were set in relation to special test boilers in ac-
cordance with the methods defined in EN 267 standards.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
Example:
delivery 65 kg/hour:
diameter = 60 cm; length = 2 m.
Whenever the burner is operated in a much smaller commercial-
ly-available combustion chamber, a preliminary test should be
performed.
Fig. 4
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