Table of Contents
Advertisement
every 4 seconds.
• Turn the function selector 7 as in Fig. 7.7.
The appliance operation light 9 will flash
every 2 seconds.
9
Fig. 7.7
The boiler will now go through an ignition se-
quence and the burner will light.
If during the ignition attempt period the boiler
fails to light, the full sequence control p.c.b.
will go to lockout and the lock-out signal lamp
5 will appear.
To reset the boiler press and release the boiler
reset button 6.
7.7
Checking the gas pressure at
the burner
This boiler has been factory tested to the
highest quality control standards.
The maximum and minimum gas pressures
are already set during this quality control
process however the checking procedure
must be followed to ensure maximum op-
erating efficiency from the boiler.
• Remove the front panel of the case (see
section "Dismantling the external panels" to
page 50) and the sealed chamber lid.
• Loosen the internal screw 35 (Fig. 7.8) on
the Outlet Pressure Test Point of the Gas
Valve and connect a pressure gauge using
a suitable hose.
COMMISSIONING
7
6 5
• Set the c.h. temperature control knob to its
maximum position. If external controls are
fitted (e. g. Timeclock, room thermostat) en-
sure they "call for heat".
• Switch on the boiler.
• Check the maximum gas pressure and com-
pare the value on the gauge with the value
indicated in the sections "Technical Data"
on pag. 18 or pag. 21 (gas pressures at the
burner), accordingly with the model of boiler
installed.
• Check the maximum gas flow at the gas me-
ter and compare the value indicated in the
sections "Technical Data" on pag. 18 or pag.
21 (gas rate), accordingly with the model of
boiler installed.
• Switch off the boiler.
• Disconnect the gas modulator coil by re-
moving the electrical connector A (Fig. 7.8).
35
Fig. 7.8
• Switch on the boiler.
• Check that the boiler lights up uniformly. If
not refer to section "Ignition gas pressure
adjustment" of the Service Manual for the
necessary adjustment procedures.
• Switch off the boiler and disconnect the
pressure gauge.
A
- 45 -
Advertisement
Table of Contents
