Verona WALL HUNG GAS BOILER manual Commissioning Cont, 15.4Adjustment of the gas pressure

15. Commissioning Cont.

•Remove the front panel of the case.

•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.

F

15 G

16 E

Figure 15.5

15.4Adjustment of the gas pressure:

•Remove the

protection cap I (Fig. 15.6) from the mechanical pressure adjustment components levering with a flat screwdriver in the slots H.

•Start the boiler at its maximum power.

H I

Figure 15.6

•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.

Important: after the checks all of the test points must be sealed.

15.5 Checking the ignition device:

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 15.3). To reset the boiler turn the knob B (figure 15.3) on the 0 position and then press and release the boiler reset button (C on Figure 15.3).

RIVA HEAT ONLY MANUAL – REV A 32