20132157
16
GB
Start-up, calibration and operation of the burner
NOTE
The pre-heater might be provided with a second thermostat
of maximum value with a manual reset. That thermostat can
be used as a switch operating by means of an external
commutator, which can take off the current from the pre-
heater in case of over-temperature (Kit code no. 3000800).
The resistance R placed on the nozzle-holder is wired to the
supply line of the pre-heater (see page 12).
When the burner is off, the pre-heater supply line shall
remain fed. Should the pre-heater line be turned off, the fuel
must be pre-heated for approximately 30 minutes before the
burner start-up.
On the contrary, the nozzle-holder resistance shall be
supplied with an independent single-phase line, protected by
a fuse of 1A.
This line shall never be switched off, when the burner is off.
Before the burner start-up, verify that the pump is filled of
fuel in order to avoid any idling for too long time.
Filters cleaning:
periodically clean the filters in order to avoid any trouble at
the burner operation.
Supply line filter:
positioned on the suction line, it causes the increase of the
depression in the pump with the consequent flow of gas and
noise. Do not overcome the depression of 38 cm Hg (5 m
W.c.) (5, Fig. 3).
Pre-heater filter (10, Fig. 3):
positioned in the delivery line, it causes a decrease of the
spraying pressure which is detectable by use of a
manometer (12, Fig. 3).
MANOMETER PROTECTION VALVE
After spray pressure check, it is recommended to cut out the
manometer (12, Fig. 3) to avoid pressure shock that it can suffer
at every burner starting. Close protection valve when the burner
is not working and the manometer indicate 0 bar.
6.6
Burner start-up cycle
6.7
Burner start-up cycle diagnostics
During start-up, indication is according to the followin table:
Fig. 15
Thermostat probe
Resistance
Tubes into aluminium plate
Aluminium
D2751
plate
Fig. 16
Lock-out because no ignition
Normal
Thermostat
Motor
Ignition transformer
1
st
flame valve
2
nd
flame valve
Lock-out lamp
D2713
COLOUR CODE TABLE
Sequences
Colour code
Pre-purging
Ignition phase
Operation, flame ok
Operating with weak flame signal
Electrical supply lower than ~ 170V
Lock-out
Extraneous light
Key:
Off
Yellow
Green
Red
