Verona WALL HUNG GAS BOILER Gas Heater User Manual


 
15. Commissioning Cont.
15.4 Adjustment of the gas pressure:
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.
E
15
16
F
G
Figure 15.5
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).
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