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

15. Commissioning Cont.
• Remove the front panel of the case.
• Take off the lid of the sealed chamber.
• Open the gas valve inlet pressure test
point (16 in Fig. 15.5) at the valve input,
connect a suitable pressure gauge and
check the gas pressure of the supply net-
work.
• Remove the gauge and close the pres-
sure test point 16.
• Open the gas valve outlet pressure test
point (15 in Fig. 15.5) and connect the
gauge.
•
Figure 15.5
• Remove the protection cap I (Fig. 15.7)
from the mechanical pressure adjustment
components levering with a fl at screw-
driver in the slots H.
• Start the boiler at its maximum power.
With the burner on high fl ame close the gas cock. After three ignition attempts (within about
three minutes), the lock-out signal lamp must appear (D on Figure 15.3). To reset the boiler
turn the knob B (fi gure 15.3) on the 0 position and then press and release the boiler reset but-
ton (C on Figure 15.3).
RIVA PLUS COMBI MANUAL
15.4

Adjustment of the gas pressure:

15.5

Checking the ignition device:

Figure 15.6
• Ensure that the boiler is not range rated.
• Rotate the maximum gas pressure adjust-
ment (F in Fig. 15.5) until you obtain the
required pressure (by rotating clockwise
the pressure increases).
• Turn the boiler off and disconnect one of
the two connectors (E in Fig. 15.5).
• Start the boiler and rotate the minimum gas
pressure adjustment (G in Fig. 15.5) until
you obtain the required pressure (by rotat-
ing clockwise the pressure increases).
• Turn the boiler off and re-connect the wire
to the modulating operator.
• Start the boiler and check again the maxi-
mum gas pressure setting.
• Turn the boiler off and disconnect the
gauge.
• Close the lid of the sealed chamber.
Important: after the checks all of the test
points must be sealed.
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