Riello G20 Guía de inicio rápido

20013653(4) - 07/2017

Installation, use and maintenance instructions

安装 , 使用以及维护说明书

Light oil burner

轻油燃烧器

CODE - 编码 MODEL - 型号 TYPE - 类型

20013616 G20 474T1

20137313 G20 474T1

One stage operation

一段火运行

20013653

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

separated 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

MANUAL

When the system is delivered, it is important that:

- The instruction manual is supplied to the user by the system

manufacturer, 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

technician.

To ensure a periodic check, recommends the drawing up

of a Maintenance Contract.

..................................................................................

1 20013653

TECHNICAL DATA

TYPE 474T1

Thermal power – output 95 – 213 kW – 8 – 18 kg/h

Fuel Light oil, viscosity 4 –6 mm2/s at 20°C

Electrical supply Single phase, 230 V ± 10% ~ 50Hz

Motor Run current 1.4 A – 2750 rpm – 288 rad/s

Capacitor 5 F

Ignition transformer Secondary 8 kV – 16 mA

Pump Pressure 7 – 15 bar

Absorbed electrical power 0.320 kW

Burner with CE marking in conformity with EEC Directives: Electromagnetic Compatibility 2014/30/UE,

Low Voltage 2014/35/UE, Machines 2006/42/EC.

The burner meets protection level of IP 40, EN 60529.

1 – Return line

2 – Suction line

3 – Gauge connection

4 – Pump pressure regulator

5 – Vacuum gauge connection

6 – Screws fixing air-damper

7 – Air-damper

8 – Lock-out lamp and reset button

9 – Flange with insulating gasket

10 – Combustion head adjustment screw

BURNER EQUIPMENT

Quantity Description

Flexible pipes with nipples

Flange with insulating gasket

Screws and nuts for flange

Hinge

Screw with two nuts for flange

Grommet

D7179

Fig. 1

20013653 2

WORKING FIELD

1.8

1.2

Pressure in the combustion

chamber – mbar

8 10 12 14 Fuel output - kg/h

90 110 230 Thermal power - kW

D5282 130 150 170 190 210

0.6

16 18 20

OVERALL DIMENSIONS

Flange Burner

350 118 295

160

45°

ø 125

298

230

D5283

213

99 99

190

45°

BOILER FIXING

It is necessary that the insulating gasket

(9, fig. 1) is placed between the boiler door

and the burner flange.

This insulating gasket has four holes,

which, if necessary, can be modified as

shown on the drawing on the right.

D5242

Fig. 2

Verify that the installed

burner is lightly leaned

towards the button. 

(See figure 2).

The burner is designed to

allow entry of the flexible

oil-lines on either side of

the burner.

D5572

BURNER FIXING AND

HINGE ASSEMBLY

S7385

3 20013653

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.

meters

L meters

I. D.

8 mm

I.D.

10 mm

0.5

1.5

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).

meters

L meters

I. D.

8 mm

I.D.

10 mm

0.5

1.5

3.5

100

H max. 4 m

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,

page 1) and wait until the fuel flows out.

20013653 4

ELECTRICAL WIRING

S7029

Brown

White (50V)

Blue

Motor

Capacitor

Regulating thermostat

Neutral

Switch with fuse

6A max.

Black

NOTES

–Wires of 1 mm

2 section.

– 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 flame sensor is fitted directly into the control-

box (underneath the ignition-transformer) 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

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

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

failure indicator terminal . This may

result the destroy of the control box.

D5228

Black

CARRIED-OUT BY THE INSTALLER

CARRIED-OUT IN THE FACTORY

5 20013653

COMBUSTION ADJUSTMENT

In conformity with EN267 the application of the burner on the boiler, adjustment and testing must be

carried out observing the instruction manual of the boiler, including verification of the CO and CO2

concentration 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% CO2 at sea level and with light oil and room temperature of 20 °C.

Nozzle

Pump pressure

Burner output Comb. head

adjustment

Air damper

adjustment

GPH Angle bar kg/h ± 4% Set-point Set-point

2,00 60° 12 8,0 1 3

2,25 60° 12 9,0 1,5 3,2

2,50 60° 12 10,0 23,5

3,00 60° 12 12,0 2,5 4,3

3,50 60° 12 14,0 3,5 5,5

4,00 60° / 45° 12 16,1 56,5

4,50 60° / 45° 12 18,0 6 7

NOZZLES RECOMMENDED: 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-

detachment during ignition.

45° : for narrow and long combustion-chambers.

PRESSURE: 12 bar : the pump leaves the factory set at this value

14 bar : improves flame retention; it is therefore suitable for ignitions at

low temperatures.

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 indicated

in the schedule.

D5284

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

135

20013653 6

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 combustion chamber and thus diminishing its

pressure. There is a reduction of CO2 and 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 combustion chamber and thus increasing its pressure.

The CO2 improves and the adhesion of the flame to the diffuser tends to reduce. 

(This setting is not advisable for ignitions at low temperatures).

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 3

D5285

D5231

AIR DAMPER ADJUSTMENT

The regulation of the air-rate is made by adjusting the air damper (1), after loosing the screws (2). 

When the optimal regulation is reached, screw tight the screws (2).

The settings indicated in the schedule are purely indicative.

Each installation however, has its own unpredictable working conditions: actual nozzle output;

positive or negative pressure in the combustion-chamber, the need of excess air, etc. All these

conditions may require a different air-damper setting.

PANEL

D7178

7 20013653

It is important to take account of the fact that the air

output of the fan differs according to whether the

burner has its metal cover fitted or not.

Therefore we recommended to proceed as follows:

– adjust the air damper as indicated in the schedule (4);

– mount the cover, simply by means of the upper

screw;

– check smoke number;

– should it become necessary to modify the air output,

remove the cover by loosening the screw, adjust the

air damper, remount the cover and finally recheck the

smoke number.

NOTE: When the burner works at a firing rate

higher than 17 kg/h remove the panel fitted

inside the metal cover. (See figure).

ELECTRODE SETTING

Attention:

Before assembling or removing the nozzle, loosen

the screw (A) and move the electrodes ahead.

4± 0.3 mm

D5288 A6.5 ± 0.5 mm

MOVE THE ELECTRODE

HOLDER BACKWARDS TO

THE END

BURNER START-UP CYCLE

Normal Lock-out, due to light-failure

Thermostat

Motor

Ignition transformer

Valve

Flame

Lock-out lamp

~ 12s D5229

~ 12s ~ 5s

20013653 8

ADJUSTMENTS, TO AVOID FLAME - DETACHMENT, AT BURNER - IGNITION

1) CORRECT POSITIONING OF THE ELECTRODES

4± 0.3 mm

D5288 A6.5 ± 0.5 mm

MOVE THE ELECTRODE

HOLDER BACKWARDS TO

THE END

2) NOZZLE: ATOMIZING ANGLE

Choose 60° nozzle.

3) PUMP - SETTING

The pump is factory set, at a pressure of 12 bar.

When the temperature of the gas-oil decreases below + 5 °C, increase the pressure to 14 bar.

4) COMBUSTION-HEAD SETTING

Regulate the combustion-head one set-point further ahead than indicated in the instructions.

Example: the instructions require to set the combustion-head on set-point 3.5.

Instead, the setting is made on set-point 4.5.

5) FAN - AIR DAMPER ADJUSTMENT

Adjust the damper, reducing the excess air until the Bacharach number is not near 1.

(i.e. a combustion with the lowest possible excess-air).

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