Maximum Gas Pressure Switch; Minimum Gas Pressure Switch; Pvp Pressure Switch Kit - Riello RLS 68/E MX Installation, Use And Maintenance Instructions

6.7.2

Maximum gas pressure switch

Adjust the maximum gas pressure switch (Fig. 45) 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.
6.7.3

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. 46).
With the burner operating at maximum output, increase adjust-
ment 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).
1 kPa = 10 mbar
WARNING WARNING
6.7.4

PVP pressure switch kit

Adjust the pressure switch for the leak detection control (PVP kit)
(Fig. 47) according to the instructions supplied with the kit.
Start-up, calibration and operation of the burner
D3856
35 GB
PA
20181543
PGM
Fig. 45
D3855
Fig. 46
D3855
Fig. 47
20121288