Checking The Burner Ignition; Adjustment Of The Useful C.h. Output - Biasi Riva Plus Installation & Operation Instructions

15. Commissioning Cont.
• Turn the boiler OFF.
• Open the gas valve outlet pressure test point
15 (fi gure 15.5) and connect the gauge.
• Turn the boiler ON positioning the function se-
lector B in the position shown in fi gure 15.7
and ensure that the room thermostat is set to
"heat demand".
Figure 14.7
• Loosen screws D and remove the service
panel (fi gure 15.9).
Figure 14.8
• Watch the gauge and check to see if the ig-
nition pressure registerd corresponds to the
values given in the Technical Data. Turn off
the boiler and reignite it by turning the function
selector B to the 0 position and then back to
that indicated in fi gure 15.7.
• Turn the boiler OFF.
• Open the gas valve outlet pressure test point 15 (fi gure 15.5) and connect the gauge.
• Turn the boiler ON positioning the function selector B in the position shown in fi gure 15.7 and ensure
that the room thermostat is set to "heat demand".
• Loosen screws D and remove the service panel (fi gure 15.8).
• To carry out the adjustment use the adjustment device (RISC) with the help of a screwdriver.
• By rotating the device clockwise the pressure increases.
• Adjust the gas pressure at the burner to the value according to the useful c.h. output wanted (Tab. 15.1).
• Reassemble the service panel.
• Close the gas valve outlet pressure test point 15 (fi gure 15.5).
• Reassemble the front pannel of the case.
RIVA PLUS MANUAL

14.6 Checking the burner ignition:

B

14.7 Adjustment of the useful c.h. output:

• Repeat this process two to three times leav-
ing 30 second intervals between each igni-
tion. Check the ignition pressures and visually
check that the burner lights uniformly and in a
controlled manner.
• To carry out the adjustment move the function
selector 3 to the OFF position (Fig. 15.9) and
use the device (ACC).
Figure 14.9
• Adjust the gas pressure at the injectors to the
value indicated in the tables of section 2. By
rotating the device clockwise the pressure in-
creases.
• After the adjustment operations bring the se-
lector 3 of fi gure 15.9 back to the normal posi-
tion (ON).
• Reassemble the service panel.
• Close the gas valve outlet pressure test point
15 (fi gure 15.5).
• Reassemble the front pannel of the case.
Important: after the checks all of the test
points must be sealed.
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