Riello PRESS 30 N/ECO Installation, Use And Maintenance Instructions page 30

IMPORTANT NOTES
If the pre-heater thermostat or the resistor in contact with
the probe is to be replaced, the probe has to be positioned
in contact with the resistor and with the pipes of the last
aluminium plate, after loosening of the fixing screws of the
aluminium plate pack. See drawing opposite.
If, during the operation exceptional differences or temper-
atures that peak too high should be detected, verify the
continuity of the resistor, using an ohmmeter, contacting
the temperature probe (value approximately 35 Ohm).
Only use filters marked with a recognizable printing on the screwing hexagon.
NOTES
 The pre-heater might be fitted with a second thermostat of maximum value.
This thermostat can be used as a switch on an external contact maker to cut off current to the pre-heater in
case of excess temperature (Kit code no. 3000800).
Resistor R 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 resistor must be supplied with an independent single-
phase line, protected by a 1A fuse.
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 it running empty for too long.

 Filter cleaning:
periodically clean the filters in order to avoid malfunctioning in burner operation.
 Supply line filter:
positioned on the suction line, it causes the increase of the vacuum in the pump with the consequent flow of
gas and noise. Do not exceed the vacuum of 38 cm Hg (5 m W.c.) at the vaccumeter attachment (5, fig. 1).
Pre-heater filter (10, fig. 1):

positioned in the delivery line, it causes a decrease of the atomising pressure which can be checked on
the manometer (12, fig. 1).
MANOMETER PROTECTION VALVE
After atomising pressure check, it is recommended to cut off the manometer (12, fig. 1) to avoid pressure shocks
that it might be subjected to at every burner starting.
Close protection valve when the burner is not operation and the manometer indicates 0 bar.
6192
Plate
D2751
8
GB
Plate tubes
Resistor
Thermostat probe