Riello G20S Quick start guide

20013755 (2) - 06/2011
Installation, use and maintenance instructions
安装 , 使用以及维护说明书
Light oil burners
轻油燃烧器
CODE -编码 MODEL -型号 TYPE -类型
20013636 G20S 482T1
20040295 G20S 482T58
GB
CN
One stage operation
一段火运行

20013755
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INFORMATION ABOUT THE INSTRUCTION MANUAL
INTRODUCTION
The instruction manual supplied with the burner:
- is an integral and essential part of the product and must not be sepa-
rated from it; it must therefore be kept carefully for any necessary
consultation and must accompany the burner even if it is transferred
to another owner or user, or to another system. If the manual is lost
or damaged, another copy must be requested from the Technical
Assistance Service of the area;
- is designed for use by qualified personnel;
- offers important indications and instructions relating to the installation
safety, start-up, use and maintenance of the burner.
DELIVERY OF THE SYSTEM AND THE INSTRUCTION MAN-
UAL
When the system is delivered, it is important that:
- The instruction manual is supplied to the user by the system manu-
facturer, with the recommendation to keep it in the room where the
heat generator is to be installed.
- The instruction manual shows:
- the serial number of the burner;
- the address and telephone number of the nearest Assistance
Centre;
- The system supplier carefully informs the user about:
- the use of the system,
- any further tests that may be necessary before the system is
started up,
- maintenance and the need to have the system checked at least
once a year by the manufacturer or another specialised techni-
cian.
To ensure a periodic check, recommends the drawing up
of a Maintenance Contract.
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TECHNICAL DATA
OBurner with CE marking in conformity with EEC Directives: EMC 2004/108/EC, Low Voltage 2006/95/EC.
OThe burner meets protection level of IP 40, EN 60529.
TYPE 482T1 482T58
Thermal power – output 95 – 240 kW – 8 – 20 kg/h
Fuel Light oil, max. viscosity at 20 °C: 6 mm2/s
Electrical supply Single phase, 230V ±10% ~50Hz
Motor Run current 1.5A
2750 rpm – 288 rad/s Run current 2.2A 3250 rpm – 340 rad/s
Capacitor 5 F4F
Ignition transformer Secondary 8 kV – 16 mA
Pump Pressure 7 – 15 bar Pressure 8 – 15 bar
Absorbed electrical power 0.33 kW 0.41 kW
1– Return line
2– Suction line
3– Gauge connection
4– Pump pressure regulator
5– Vacuum gauge connection
6– Hydraulic jack with air-damper
7– Combustion head adjustment screw
8– Lock-out lamp and reset button
9– Flange with insulating gasket
10 – Start delaying device
BURNER EQUIPMENT
Quantity Description
2
1
4
1
1
1
Flexible pipes with nipples
Flange with insulating gasket
Screws and nuts for flange
Maintenance assembly
Screw with two nuts for flange
Grommet
D8077
Fig. 1

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WORKING FIELD
OVERALL DIMENSIONS
3.6
0
2.4
Pressure in the combustion
chamber – mbar
8 10 12 14 Light oil output- kg/h
90 120 240 Thermal power - kW
D5797 150 180 210
1.2
16 18 20
0.3
Flange Burner
350 118 295
160
=
41
45°
ø125
298
11
230
D5283
=
213
99 99
190
45°

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INSTALLATION
BOILER FIXING
Put on the flange (1) the screw and two nuts, (see fig. 2).
Widen, if necessary, the insulating gasket holes (5), (see fig. 3).
Fix the flange (1) to the boiler door (4) using screws (2) and (if necessary) the nuts (3) interposing the
insulating gasket (5), (see fig. 4).
MAINTENANCE POSITION
Access to the combustion head, diffuser disc / electrodes unit and nozzle, (see fig. 5).
Remove the burner out of the boiler, after loosing the fixing nut to the flange.
Hook the burner to the flange (1), by removing the combustion head (6) after loosing the fixing screws (7).
Remove the diffuser disc-holder assembly (9) from the nozzle-holder (8) after loosing its fixing screw.
Screw the nozzle (10).
Fig. 6
Verify that the installed burner is lightly leaned towards the
button.
(See figure 6).
The burner is designed to allow entry of the flexible oil-lines
on either side of the burner.
D5572
D5012
Fig. 2
1
Fig. 3
5
E9022
D8058
1
Fig. 4
43
2
2
5
110
9
8
7
6
Fig. 5
D8056 D8057

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HYDRAULIC SYSTEMS
Warning: before starting the burner make sure that the return pipe-line is not clogged: any obstruction
would cause the pump seals to break.
The pump vacuum should not exceed a
maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from
the oil.
Oil lines must be completely airtight.
The return line should terminate in
the oil tank at the same level as the
suction line; in this case a non-return
valve is not required.
When the return line arrives over the
fuel level, a non-return valve must be
used.
This solution however is less safe than
previous one, due to the possibility of
leakage of the valve.
PRIMING THE PUMP
Start the burner and wait for the priming.
Should lock-out occur prior to the arrival
of the fuel, await at least 20 seconds
before repeating the operation.
A filter must be installed on the suction fuel line.
H
meters
Lmeters
I. D.
8 mm I.D. 10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
WARNING
The pump is supplied for use with a two pipe system.
For use on a one pipe system, it is necessary to remove the by-pass
screw (A), (see figure).
A
H
meters
Lmeters
I. D.
8 mm I.D. 10 mm
0
0.5
1
1.5
2
3
3.5
35
30
25
20
15
8
6
100
100
100
90
70
30
20
H max. 4 m
H
H
max. 4 m
min. 0.1 m
D5219
D5220
D5199
H=Difference of level.
L=Max.length of the
suction line.
I.D.=Internal diameter of the
oil pipes.
PRIMING THE PUMP
Loosen the plug of the vacuum gauge (5, fig. 1) and
wait until the fuel flows out.

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ELECTRICAL WIRING
S7333
Brown
White (50V)
Blue
Motor
Capacitor
Regulating thermostat
Neutral
Switch with fuse
6A max.
NL
M
~
Black
NOTES
– Wires of 1 mm2section.
– The electrical wiring carried out by the installer
must be in compliance with the rules in force in
the Country.
– To remove the control-box from the burner,
loosen screw (A) (see figure) and pull
towards the arrow.
– The photoresistance is fitted directly into the
control-box (underneath the ignition-trans-
former) on a plug-in support.
TESTING
Check the shut-down of the burner by opening the
thermostats.
WARNING
Do not exchange the neutral with the phase.
230V ~50Hz
NL
Limit thermostat
with manual resetting
Remote lock-out lamp
(230V - 0.5A max.), if required
123456789
Blue
Brown
Terminal block of
control-box 530SE*
Valve
T
T
RUN OF THE ELECTRICAL CABLE
1- Grommet N- Neutral
2- Cable-clamp L- Phase
3- Terminal block - Burner-earth
ATTENTION
Do not connect burner’s grounding, to fail-
ure indicator terminal . This may result
the destroy of the control box.
D5228
Black
CARRIED-OUT BY THE INSTALLER
CARRIED-OUT IN THE FACTORY

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COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjust-
ment and testing must be carried out observing the instruction manual of the boiler, including verifi-
cation of the CO and CO2concentration in the flue gases, their temperatures and the average
temperature of the water in the boiler.
To suit the required appliance output, fit the nozzle then adjust the pump pressure, the setting of
the combustion head and the air damper opening in accordance with the following schedule.
The values shown in the table are measured on a CEN boiler (as per EN 267).
They refer to 12.5% CO2at sea level and with light oil and room temperature of 20 °C.
RECOMMENDED NOZZLES: Monarch type R - PLP
Delavan type B - W
Steinen type S - SS
Danfoss type S - B
Angle: 60° :In most cases. Particularly suited to avoid flame-detach-
ment during ignition.
For narrow and long combustion-chambers it is advisable
to use full cone nozzles (e.g. 60° B).
TYPE
Nozzle
Pump pressure Burner output Comb. head adjustment Air damper adjustment
Low-flame High-flame
GPH Angle bar kg/h ± 4% Set-point Set-point Set-point
482T1
2.00 60° 12 8.0 1 2.2 2.5
2.25 60° 12 9.0 1.5 2.5 2.9
2.50 60° 12 10.0 2 2.7 3.1
3.00 60° 12 12.0 2.5 3.1 3.7
3.50 60° 12 14.0 3.5 3.5 4.8
4.00 60° 12 16.1 4 4 6
4.50 60° 12 18.1 5 4.5 7
4.50 60° 14 19.5 6 5 8
482T58
2.00 60° 12 8.0 1 1.8 2.0
2.25 60° 12 9.0 1.5 2.1 2.5
2.50 60° 12 10.0 2 2.4 2.8
3.00 60° 12 12.0 2.5 2.8 3.2
3.50 60° 12 14.0 3.5 3.2 4.0
4.00 60° 12 16.1 4 3.6 5.0
4.50 60° 12 18.1 5 4.0 6.0
4.50 60° 14.5 19.9 6 4.5 7.0
1
2
3
1

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COMBUSTION HEAD SETTING:This is done when fitting the nozzle, with the blast tube
removed. It depends on the output of the burner and is
carried out by rotating the regulating rod, till the terminal
plane of the blast tube is level with the set-point, as indi-
cated in the schedule.
Combustion head settings indicated in the schedule are valid for most cases.
The setting of the fan output according to the installation should normally be done only through the air
damper. Should one subsequently want to retouch also the setting of the combustion head, with the
burner running, operate on the rod (1) with a 6 mm spanner (2) as follows:
TURN TO THE RIGHT: (sign +)
In order to increase the volume of air entering the combus-
tion chamber and thus diminishing its pressure.
There is a reduction of CO2and the adhesion of the
flame to the air diffuser disc improves.
(Setting advisable for ignitions at low temperatures).
TURN TO THE LEFT: (sign –)
In order to reduce the volume of air entering the com-
bustion chamber and thus increasing its pressure. The
CO2improves and the adhesion of the flame to the dif-
fuser tends to reduce.
(This setting is not advisable for ignitions at low temper-
atures).
In any case do not bring the combustion head setting
more than one point away from that indicated in the
schedule. One set-point corresponds to 3 turns of the
rod; a hole (3) at its end facilitates counting the number
of turns.
2
In the sketch on the left, the combustion head
is set for an output of 3.50 GPH at 12 bar,
while the shutter is level with set-point 3.5, as
required by the above schedule.
Blast tube
Regulating rod
Shutter
Terminal plane of the blast tube
D5284
2
135
1
2 3
6
D8068

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PUMP-PRESSURE AND AIR-FLOW
The burner, in order to guarantee good smooth starts, irrespective of the type of boiler, is fitted with a
hydraulic device which, independently of the control-box, reduces the fuel- and air-flow.
At ignition, the pressure at the nozzle is 9 bar. After 4 - 6 seconds, it automatically increases to 12 bar.
The air-flow, initially adjusted to the low setting, is, at the change-over of pressure, automatically
brought to the air-flow required for the big flame.
SETTING FOR THE LOW IGNITION-FLAME
Air-damper adjustment
Loosen the screw (1), by approximately one full turn; in this way, the burner remains permanently
on low flame.
Loosen the nut (2), turn the screw (3), in order to set the air-damper (4) in the position required.
Then, lock the nut (2) and tighten the screw (1).
Reducer-adjustment
The pressure-reducer is factory set, at 9 bar.
The pressure-gauge should be mounted, in place of plug (6).
Should it be necessary to re-set or alter such pressure, this can be done, by adjusting screw (5)
(always, after having loosened screw 1 ).
HIGH-FLAME SETTING
Air-damper adjustment
Loosen the nut (7), turn the screw (8), until the air-damper (4) is in the required position.
Then, lock the nut (7).
Pump-adjustment
The pump-pressure is pre-set, during production, at 12 bar.
Should it become necessary to re-set or alter such pressure, this can be done by turning screw (9).
S7336
S7334