Burner Start-Up Cycle - Riello PRESS 45 N Manuel D'entretien

NOTICE
If the pre-heater thermostat or the resistance contacting
the probe should be replaced, the probe has to be posi-
tioned in contact with the resistance and with the pipes of
the last aluminium plate, after loosening of the fixing
screws of the aluminium plate, see drawing.
If during the operation exceptional changes or too much
high temperatures should be detected, verify the continu-
ity of the resistance, using and ohmmeter, contacting the
temperature probe (approximately 35 Ohm).
Use only filters marked with a recognizable printing on the
screwing hexagon.
NOTE
The pre-heater might be provided with a second thermostat of maximum value with a manual reset. That ther-
mostat 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 pag. 4).
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, pro-
tected 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. 1).
Pre-heater filter (10, fig. 1):
positioned in the delivery line, it causes a decrease of the spraying pressure which is detectable by use of a
manometer (12, fig. 1).
MANOMETER PROTECTION VALVE
After spray pressure check, it is recommended to cut out the manometer (12, fig. 1) 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.
4.6

BURNER START-UP CYCLE

Normal
Thermostat
Motor
Ignition transformer
st
1 flame valve
nd
2 flame valve
Lock-out lamp
Motor lock-out
It is caused by the motor overload relay if over-load occurs or no phase.
Reset: push the buttons 7 and 8, fig. 1.
5828
Aluminium
plate
D2751
Lock-out because no ignition
7
GB
Tubes into aluminium plate
Resistance
Thermostat probe
D2713