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

15. Commissioning Cont.
Turn the boiler OFF.
•
Open the gas valve outlet
•
pressure test point 19
(figure 15.6) and connect
the gauge
Turn the boiler ON
•
positioning the function
selector B in the position
shown in figure 15.8 and
ensure that the room
thermostat is set to "heat
demand".
Figure 15.8
• Loosen screws K and
remove the service panel
(figure 15.9).
K
K
K
Figure 15.9
Turn the boiler OFF.
•
Open the gas valve outlet pressure test
•
point 19 (figure 15.6) and connect the
gauge.
Turn the boiler ON positioning the
•
function selector B in the position shown
in figure 15.8 and ensure that the room
thermostat is set to "heat demand".
• Loosen screws K and remove the service
panel (figure 15.9).
• To carry out the adjustment use the
adjustment device (RISC) with the help of
a screwdriver.
RIVA COMBI MANUAL - REV B

15.7 Checking the burner ignition:

• Watch the gauge and
check to see if the
ignition pressure
registered corresponds
to the values given in the
Technical Data. Turn off
the boiler and reignite it
by turning the function
selector B to the OFF
position and then back to
that indicated in
figure15.8
• Repeat this process two
to three times leaving 30
second intervals
between each ignition.
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. 15.10)
and use the device
(ACC).

15.8 Adjustment of the useful c.h. output:

• Adjust the gas pressure
at the injectors to the
value indicated in the
tables of section 2. By
rotating the device
clockwise the pressure
increases.
• After the adjustment
operations bring the
selector 3 of figure 15.10
back to the normal
position (ON).
• Reassemble the service
panel.
• Close the gas valve
outlet pressure test point
19 (figure 15.6).
• Reassemble the front
panel of the case.
Important: after the
checks all of the test
points must be sealed.
• 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 19 (figure 15.6).
• Reassemble the front panel of the case.
+
RISC
+
ACC
ON
1 2 3
4
OFF
Figure 15.10
39