Adjustment Of The Gas Pressure; Checking The Ignition Device - Biasi Riva Plus 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 network.
• Remove the gauge and close the pressure
test point 16.
• Open the gas valve outlet pressure test point
(15 in Fig. 15.5) and connect the gauge.
Figure 14.5
• Remove the protection cap I (Fig. 15.6) from
the mechanical pressure adjustment compo-
nents levering with a fl at screwdriver 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 min-
utes), 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 button (C on Figure 15.3).
36 RIVA PLUS MANUAL

14.4 Adjustment of the gas pressure:

14.5 Checking the ignition device:

Figure 14.6
• Ensure that the boiler is not range rated.
• Rotate the maximum gas pressure adjustment
(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 rotating
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.
• Close the lid of the sealed chamber.
Important: after the checks all of the test
points must be sealed.