5893
10
NOTES
1
- The pre-heater might be provided with a second thermostat of maximum value with 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).
2
- The resistance R placed on the nozzle-holder is wired to the supply line of the pre-heater (see drawing page
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 approx. 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 1 A.
This line shall never be switched off, when the burner is off.
3
- Before the burner start-up, verify that the pump is filled of fuel in order to avoid any idling for too long time.
4
- 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.) (fig. 1 pos. 5).
Pre-heater filter: (fig. 1 pos. 10) positioned in the delivery line, it causes a decrease of the spraying pres-
sure which is detectable by use of a manometer (fig. 1 pos. 12)
.
MANOMETER PROTECTION VALVE
After spray pressure check, it is recommended to cut out the manometer (fig.1 pos. 12) 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.
