Checking The Burner Ignition; Adjustment Of The Useful C.h. Output - QHT Riva Installation, Operation And Service Instructions

15. Commissioning Cont.
Turn the boiler OFF.
•
Open the gas valve
•
outlet pressure test
point 15 (figure 15.5)
and connect the
gauge.
Turn the boiler ON
•
positioning the
function selector B in
the position shown in
figure 15.7 and
ensure that the room
thermostat is set to
"heat demand".
B
Figure 15.7
• Loosen screws D and
remove the service
panel (figure 15.8).
D
D
D
Figure 15.8
Turn the boiler OFF.
•
Open the gas valve
•
outlet pressure test
point 15 (figure 15.5)
and connect the
gauge.
Turn the boiler ON
•
positioning the
function selector B in
the position shown in
figure 15.7 and
ensure that the room
thermostat is set to
"heat demand".
• Loosen screws D and
40

15.6 Checking the burner ignition:

• Watch the gauge and
check to see if the
ignition 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 figure
15.7.
• 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.
15.9) and use the
device (ACC).

15.7 Adjustment of the useful c.h. output:

remove the service
panel (figure 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.
• 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
15.9 back to the
normal position (ON).
• Reassemble the
service panel.
• Close the gas valve
outlet pressure test
point 15 (figure 15.5).
• Reassemble the front
pannel of the case.
Important: after the
checks all of the test
points must be sealed.
15.1).
• Reassemble the
service panel.
• Close the gas valve
outlet pressure test
point 15 (figure 15.5).
• Reassemble the front
pannel of the case.
RIVA HEAT ONLY MANUAL - REV B
+
RISC
+
ACC
ON
1 2 3
4
OFF
Figure 15.9