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Start-up, calibration and operation of the burner
6.7.4
Flame presence check
The burner is fitted with an ionisation system to check that a
flame is present. The minimum current for control box operation
is 6 µA. The burner provides a much higher current, so that no
check is usually needed. However, if it is necessary to measure
the ionisation current, disconnect the plug-socket 5)(Fig. 7 on
page 13) on the ionisation probe cable and insert a full scale 100
µA direct current microammeter.
Carefully check polarities.
20156565
WARNING
Fig. 36
NOTE:
When the calibration of the pressure adjuster is changed to ob-
tain the required 2nd stage output, the ignition must be checked
again.
A rough indication of the 2nd stage max delivery can be obtained
by just reading the gas pressure at the coupling 16)(Fig. 6 on
page 12) on the U-shaped pressure gauge (Fig. 24 on page 26)
and following the instructions given in page 22.
34
GB
20148758
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