Riello RLS 800/E MX, Installation, Use And Maintenance Instructions

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20010309 30 GB
Start-up, calibration and operation of the burner
6.8 Adjustment pressure switches
6.8.1 Air pressure switch - CO check
Adjust the air pressure switch after having performed all other
burner adjustments with the air pressure switch set to the start of
the scale (Fig. 36).
With the burner working at MIN output, insert a combustion
analyser in the stack, slowly close the suction inlet of the fan (for
example, with a piece of cardboard) until the CO value does not
exceed 100 ppm.
Slowly turn the appropriate knob clockwise until the burner goes
into lockout.
Check the indication of the arrow pointing upwards on the gradu-
ated scale (Fig. 36).
Turn the knob clockwise again, until the value shown on the grad-
uated scale corresponds with the arrow pointing downwards
(Fig. 36), and so recovering the hysteresis of the pressure switch
(shown by the white mark on a blue background, between the two
arrows).
Now check the correct start-up of the burner.
If the burner locks out again, turn the knob anti-clockwise a little
bit more.
6.8.2 Max. gas pressure switch
Adjust the maximum gas pressure switch (Fig. 37) after making
all other burner adjustments with the maximum gas pressure
switch set to the end of the scale.
To calibrate the maximum gas pressure switch, open the tap and
then connect a pressure gauge to its pressure test point.
The maximum gas pressure switch must be regulated to a value
no higher than 30% of the measurement read on the gauge when
the burner is working at maximum output.
After making the adjustment, remove the pressure gauge and
close the tap.
6.8.3 Min. gas pressure switch
Adjust the minimum gas pressure switch after having performed
all the other burner adjustments with the pressure switch set at
the start of the scale (Fig. 38).
With the burner operating at maximum output, increase adjust-
ment pressure by slowly turning the relative knob clockwise until
the burner locks out.
Then turn the knob anti-clockwise by 0,2 kPa (2 mbar) and re-
peat burner starting to ensure it is uniform.
If the burner locks out again, turn the knob anti-clockwise again
by 0,1 kPa (1 mbar).
6.8.4 Pressure switch PVP kit
Adjust the pressure switch for the valve leak detection control de-
vice (PVP kit) (Fig. 35), if present, according to the instructions
supplied with the kit itself.
WARNING
1 kPa = 10 mbar
Fig. 35
D3855
Fig. 36
D3854
Fig. 37
PGM
PA
D3856
20181543
Fig. 38
D3855