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5.11
Heavy oil supply
Explosion danger due to fuel leaks in the
presence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure the fuel shut-off valve is closed before
performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
ATTENTION
5.11.1 Hydraulic system
Make sure that the hoses to the pump supply
and return line are installed correctly.
CAUTION
Follow the instructions below:
Tighten the flexible hoses with the supplied
gaskets.
During the installation, hoses must not be
ATTENTION
stressed with twisting.
Position hoses so that they cannot be
stepped on or get into contact with hot parts
of the boiler and so that they allow burner
opening.
Finally, connect the other end of the flexible
hoses to the suction and return line ducts.
Key (Fig. 17)
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
Installation
Before starting the burner make sure that the
return pipe line is not clogged. Any obstruction
would cause the pump seals to break.
ATTENTION
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)(Fig. 17) must be regulated in relation to
the feed temperature, as shown in the table opposite.
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
burner as normal.
Oil pipes must be completely airtight.
ATTENTION
Heavy oil temperature
°C
Up to 80
90
100
110
120
21
GB
S7964
Fig. 17
Pressure
bar
1.0
1.5
2.0
2.5
3.0
Tab. H
20176605
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