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Start up
- Air pressure switch adjustment - Setting gas pressostat
Air pressure switch calibration
The air pressure switch is provided for
monitoring the pressure of the
combustion air fan.
Unscrew screws A and B and remove
cover C.
After the air and gas setting you have to
D
calibrate the air switch with the burner
C
working on the low flame by slowly turning
the relative knob clockwise until the burner
locks out. Read the value and then
A
decrease it by 15%.
WARNING: the air pressure switch shall
B
prevent the air pressure to go below 85%
from the adjustment value in order to
prevent the CO in the fumes to exceed 1%
(10000 ppm).
Min gas pressure switch
The gas pressure switch has the function
N
to check that the gas pressure before the
M
gas valve does have the minimum
pressure to make the burner running
correctly.
I
Unscrew off and remove cover M.
- Set knob N to a value equal to 60% of
gas nominal feed pressure (i.e. for natural
L
gas nom. pressure = 20 mbar, set knob to
a value of 12 mbar; for LPG nom. pressure
of G30/G31- 30/37 mbar, set knob to a
value of 18 mbar). Screw up cover M.
14
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