Checking The Gas Supply Pressure - Biasi M110B.24SM/C User Manual And Installation Instructions

The appliance operation light 10 will flash
every 4 seconds.
2 Turn the function selector 8 as in Fig. 7.6. The
appliance operation light 10 will flash every 2
seconds.
10
Fig. 7.6
The boiler will now go through an ignition se-
quence and the burner will light.
If after four ignition attempts (about four minutes)
the boiler fails to light, the boiler will go to lockout
and the lock--- out signal lamp 6 will appear.
To reset the boiler press and release the boiler re-
set button 7.
For the first lighting up and following maintenance
procedures for the gas supply, it may be necess-
ary to repeat the resetting operation several times
so as to remove the air present in the pipework.
After five consecutive resetting attempts the reset
button is inhibited. To restore its function it is
necessary to switch the boiler off and on from the
electrical mains, using the fused spur isolation
switch fitted adjacent to the appliance.
7.7 Checking the gas supply
pressure
This boiler has been factory tested to the
highest quality control standards and set for
the minimum and maximum gas working pres-
sures, connected to a 1 m flue and a gas supply
pressure of 20 mbar.
Any variation in gas supply pressure or flue
length may result in the customer experiencing
a harmonic noise from the boiler.
In these circumstances, it may be necessary to
reset the burner gas pressures in accordance
with section 11 Gas Valve of the Service Man-
ual.
It should be noted that a Flue Gas Analyser is
required for this procedure.
Checking the inlet pressure
1 Remove the front panel of the case (see sec-
8 7 6
Fig. 7.7
2 Loosen the internal screw on the Inlet Pressure
3 Open the gas inlet valve (13 on page 2).
4 Turn on the electricity supply to the boiler,
5 Set the function knob 8 as illustrated in Fig. 7.8.
Fig. 7.8
6 Open at least one hot water tap fully.
7 Read the inlet pressure value and ensure that
tion 9.2) and lower the control panel (see sec-
tion 6.9).
42
Test Point 42 (Fig. 7.7) of the Gas Valve and
connect a pressure gauge using a suitable
hose.
switching on the fused spur isolation switch.
The appliance operation light 10 will flash
every 4 seconds.
10 9
it is within the limits given in the table Gas sup-
ply pressures, sections 4.3 and 4.4 of this man-
Commissioning
8 7 6
35