Adjustment Of The Gas Pressure; Checking The Ignition Device - Biasi Riva Combi Installation & Operation Instructions

15. Commissioning Cont.
Remove the front panel
•
of the case.
Open the gas valve inlet
•
pressure test point (20
in Fig. 15.6) at the valve
input, connect a
suitable pressure gauge
and check the gas
pressure of the supply
network.
Remove the gauge and
•
close the pressure test
point 20.
Open the gas valve
•
outlet pressure test
point (19 in Fig. 15.6)
and connect the gauge.
19
20
Figure 15.6
With the burner on high flame close the gas cock. After three ignition attempts (within about
three minutes), the lock-out signal lamp must appear (D on Figure 15.4). To reset the boiler turn
the knob B (figure 15.4) on the 0 position and then press and release the boiler reset button (C
on Figure 15.4).
38

15.5 Adjustment of the gas pressure:

Remove the protection
•
cap I (Fig. 15.7) from
the mechanical
pressure adjustment
components levering
with a flat screwdriver in
the slots H.
Start the boiler at its
•
maximum power.
H
Figure 15.7
G Operate the boiler in
•
d.h.w. mode or ensure
that the boiler is not
range rated if the test is
F
carried out in c.h. mode.
Rotate the maximum
•
gas pressure
E
adjustment (F in Fig.
15.6) until you obtain
the required pressure
(by rotating clockwise
the pressure increases).

15.6 Checking the ignition device:

Turn the boiler off and
•
disconnect one of the
two connectors (E in
Fig. 15.6).
Start the boiler and
•
rotate the minimum gas
pressure adjustment (G
in Fig. 15.6) until you
obtain the required
pressure (by rotating
I clockwise the pressure
increases).
Turn the boiler off and
•
re-connect the wire to
the modulating
operator.
Start the boiler and
•
check again the
maximum gas pressure
setting.
Turn the boiler off and
•
disconnect the gauge.
Important: after the
checks all of the test
points must be sealed.
RIVA COMBI MANUAL - REV B