Riello ENNE 1400 Mode D'emploi page 42

FUEL OIL FEED PLANT
1 Tank (heated for heavy oil)
2 Filter (with resistor for oil viscosity > 7°E/50°C)
3 Transfer pump
4 Control pressure gauge
5 Gate valves for burner cut-out (coupled)
6 Burner (with kit for heavy oil)
7 Pressure regulator (calibrated as table below)
8 Filter (with resistor for oil viscosity > 7°E/50°C)
9 Burner pump
10 Degassing unit
IMPORTANT NOTES
To facilitate fuel flow, all hoses must be of appropriate
dimensions, insulated and heated (electrically or by means
of steam or hot water).
To limit the formation of gas or vapours, the fuel pressure in
degassing unit 10) must be regulated in relation to the feed
temperature, as shown in the table opposite.
HYDRAULIC OPERATION LAYOUT
Burner halt condition
Oil pressure switch
Can be adjusted between 2 and 15 bar;
in the event of excessive counter-pres-
sure on the fuel return line, it brings the
burner to a halt (recommended calibra-
tion: 5 bar).
5041
S7964
The transfer pump must have a delivery at least twice that of
the burner. When more than one burner is fed by the same
loop, the pump must provide a delivery of at least 50% more
than the total delivery of the combined burners.
For start-up: circulate fuel in the feed loop, having first cut-
out the burner using gate valves 5). Once operating level cir-
culation is achieved, open the gate valves and feed the bur-
ner as normal.
Fuel oil temperature
°C
Fino a 80
90
100
110
120
S7980
4 GB
Pressure
bar
1,0
1,5
2,0
2,5
3,0
Fig. 5
Fig. 6