Riello RLS 28, Инструкции по установке, использованию и обслуживанию

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20165123 34 GB
Start-up, calibration and operation of the burner
6.9 Pressure switch adjustment
6.9.1 Air pressure switch - check CO
Adjust the air pressure switch after performing all other burner
adjustments with the air pressure switch set to the start of the
scale (Fig. 39).
With the burner operating in 1st stage, increase adjustment
pressure by slowly turning the relevant knob clockwise until the
burner locks out.
Then turn the knob anticlockwise by about 20% of the set point
and repeat burner start-up to ensure that it is correct.
If the burner locks out again, turn the knob slightly anticlockwise.
The incorporated air pressure switch can work in a 'differential'
mode if connected with two pipes.
If a strong depression in the combustion chamber during the pre-
purging phase does not allow the air pressure switch to switch,
this can be obtained by applying a second tube between the air
pressure switch and the suction inlet of the fan.
In this way, the pressure switch will work in differential mode.
6.9.2 Minimum gas pressure switch
Adjust the minimum gas pressure switch after performing all the
other burner adjustments with the pressure switch set to the start
of the scale (Fig. 40).
With the burner operating at maximum output, increase the
pressure. With the burner operating in 2nd stage, increase the
adjustment pressure by slowly turning the relative knob clockwise
until the burner stops.
Then turn the knob anticlockwise by 0.2 kPa (2 mbar) and repeat
burner start-up to ensure it is uniform.
If the burner locks out again, turn the knob anticlockwise again by
0.1 kPa (1 mbar).
ATTENTION
In conformity with current standards, the air
pressure switch must prevent the CO in the flue
gases exceeding 1% (10,000 ppm).
To check this, insert a combustion analyser into
the chimney, slowly close the fan suction inlet (for
example with cardboard) and check that the
burner locks out, before the CO in the fumes
exceeds 1%.
ATTENTION
The use of the air pressure switch with differential
operation is only allowed in industrial applications
and where standards enable the air pressure
switch to control only fan operation, without any
reference to CO limit.
ATTENTION
1 kPa = 10 mbar
Fig. 39
D3854
Fig. 40
D3855