Riello 20145980, Руководство по установке и обслуживанию

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TYPICAL SYSTEM SCHEMATIC
3.1.2 Single-pipe system
Pressurised single-pipe systems have a positive fuel pressure at
the burner inlet.
Usually the tank is higher than the burner, or the fuel pumping
systems are on the outside of the boiler.
Single-pipe vacuum systems have a negative fuel pressure (de-
pression) at the burner inlet.
Usually the tank is lower than the burner.
9
You are advised to use additional filters on the fuel supply
line. The Manufacturer recommends the use of a good qual-
ity fuel filter on the tank and a secondary filter (supplied
as an accessory) to protect the pump and the nozzle from
contamination.
Priming the pump
On single-pipe pressurised systems, simply loosen the vacuom-
eter cap and wait until the fuel comes out.
On single-pipe vacuum systems, switch on the burner and wait
for ignition.
To prime the oil pump simply start up the burner and check for
a flame.
If the burner enters lockout before any fuel reaches it, wait at
least 20 seconds then turn the function selector to position (II)
"Reset burner" for at least 1 second before returning it to posi-
tion (I). Wait for the burner to complete the entire ignition cycle
again, up to the ignition of the flame.
9
The installer must ensure that the supply pressure does
not exceed 0.5 bar. Above this level, the pump seal is too
stressed.
Single-pipe pressurised systems
H
(*)
max .
4
m
m
in
. 0
.1
m
(*) VIC: Fuel shut-off valve (where provided)
For connecting the electricity, see paragraph "Fuel shut-off
valve VIC (not supplied)".
9
Where a fuel shut-off valve (VIC) is to be installed on the
diesel gas supply circuit to the burner, closure of the valve
must be delayed to prevent the section of hose between the
pump and the valve going into negative pressure (empty).
In parameter 2079 you can set the time delay (seconds) on
the closure of the VIC valve with respect to the burner. The
value to be set must always be
≥
the burner’s post-venti-
lation time.
H (m)
L (m)
Øi (8mm) Øi (10mm)
0,5 10 20
1 20 40
1,5 40 80
2 60 100
H = Height difference
L = Maximum length of suction hose
Øi = Internal diameter of hose
Single-pipe vacuum systems
H
(*)
max .
4
m
H
(*) VIC: Fuel shut-off valve (where provided)
For connecting the electricity, see paragraph "Fuel shut-off
valve VIC (not supplied)".
9
Where a fuel shut-off valve (VIC) is to be installed on the
diesel gas supply circuit to the burner, closure of the valve
must be delayed to prevent the section of hose between the
pump and the valve going into negative pressure (empty).
In parameter 2079 you can set the time delay (seconds) on
the closure of the VIC valve with respect to the burner. The
value to be set must always be
≥
the burner’s post-venti-
lation time.
H (m)
L (m)
Øi (8mm) Øi (10mm)
0 35 100
0,5 30 100
1 25 100
1,5 20 90
2 15 70
3 8 30
3,5 6 20
H = Height difference
L = Maximum length of suction hose
Øi = Internal diameter of hose
NOTE:
The tables show the approximate maximum lengths for the
supply line, depending on the height difference, length and di-
ameter of the fuel line.