Riello Burners 628 T Guide de démarrage rapide

2916194 (0)

Montage und Bedienungs Anleitung

Manuel d’entretien

Installation, use and maintenance instructions

Istruzioni per installazione, uso e manutenzione

Bruciatore di nafta

Heizölbrenner

Heavy oil burner

Brûleur à fioul lourd

CODICE

CODE

MODELLO - MODELL

MODELE - MODEL

TIPO - TYP

TYPE

3435023 PRESS 60 N/ECO 628 T

3435024 PRESS 60 N/ECO 628 T

Funzionamento bistadio

Zweistufiger Betrieb

Two-stage operation

Fonctionnement à deux allures

6194 1GB

INDEX

1. BURNER DESCRIPTION

Two stage heavy oil burner.

1.1 EQUIPMENT

Flexible tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2 Nipples. . . . . . . . . . . . . . . . . . . . . . . . No. 2

Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 2 Screws . . . . . . . . . . . . . . . . . . . . . . . . . No. 4

Flange shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1 Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . No. 2

Guide extensions (for the lengthened head version).No. 2 Gasket . . . . . . . . . . . . . . . . . . . . . . . . . No. 1

Fitting for operation with emulsified fuel

oil (see page 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1

1. BURNER DESCRIPTION. . . . . . . . . . . . . . 1

1.1 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. TECHNICAL DATA . . . . . . . . . . . . . . . . . . 2

2.1 Technical data . . . . . . . . . . . . . . . . . . . . . . 2

2.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 2

2.3 Field of operation . . . . . . . . . . . . . . . . . . . . 2

3. INSTALLATION . . . . . . . . . . . . . . . . . . . . . 3

3.1 Fuel oil supply systems . . . . . . . . . . . . . . . . 3

3.2 Electrical system . . . . . . . . . . . . . . . . . . . . 4

3.3 Electrical connections . . . . . . . . . . . . . . . . 5

4. OPERATION . . . . . . . . . . . . . . . . . . . . . . . 6

4.1 Choice of nozzles . . . . . . . . . . . . . . . . . . . 6

4.2 Pump pressure . . . . . . . . . . . . . . . . . . . . . 6

4.3 Combustion head setting. . . . . . . . . . . . . . . . 6

4.4 Adjustment of the air damper motor . . . . . . . 6

4.5 Air pressure switch . . . . . . . . . . . . . . . . . . . . 7

4.6 Atomisation temperature adjustment . . . . . . . 7

4.7 Start-up programme. . . . . . . . . . . . . . . . . . . . 9

4.8 Ecological oil burners . . . . . . . . . . . . . . . . . . 9

4.9 Emulsified fuel oil functioning . . . . . . . . . . . . 9

4.10 Start-up programme diagnostics . . . . . . . . . 10

4.11 Operating fault diagnostics . . . . . . . . . . . . . 10

2893

OThe burner meets protection level of IP 40, EN 60529

OBurner with CE marking in conformity with EEC directives: EMC 89/336/EEC, Low Voltage

73/23/EEC and Machines 98/37/EEC .

1 - Suction line

2 - Return fitting

3 - Pump pressure regulator

4 - Manometer fitting(G1/8)

5 - Vacuometer fitting (G1/2)

6 - Air damper opening motor

7 - Control box reset push-button

and lock-out light

8 - Fan overload cutout reset

9 - Regulating screw for combustion head

10 - Double filter

11 - Valve group

12 - Manometer with protection valve

13 - Adjustment thermostat

14 - Pre-heater contact maker

15 - Ignition transformer

16 - Terminal board

17 - Cable glands

18 - Antigas valve

19 - Thermometer

20 - Pump motor starter with reset

21 - Air pressure switch

Fig. 1

6194 2GB

2. TECHNICAL DATA

2.1 TECHNICAL DATA

2.2 DIMENSIONS

2.3 FIELD OF OPERATION (2 nozzles in operation)

TYPE 628 T

Thermal power - Capacity 171/342 - 684 kW – 15/30 - 60 kg/h

Fuel Oil with max. viscosity at 50° C 115 sq.mm/s (15° E)

Electrical supply Three-phase, 230V ±10% ~50Hz without neutral

400V ±10% ~50Hz with neutral

Motor 230V - 400V Fan: 3.4A - 2A

Pump: 2.1A - 1.2A

Ignition transformer Primary 2 A – Secondary 2 x 6.5 kV – 35 mA

Heaters 4.2 kW

Electrical intake power 5.9 kW

Pump 100 kg/h at 20 bar

D2715

D2686

BurnerBoiler plate

NOTE

The weight of the rear part of the pumping assembly exerts flexure stress on the guides; you are advised

to hold the burner while it is being extracted so as not damage the flame disc and the said guides.

For long - head version.

Use the pin extensions provided to move the burner back.

834 245

400

625

290

Diam. 172

335

Thermal power

Pressure in combustion

chamber – mbar

D2723

When the burner operates with only one nozzle, the pressurization conditions are better and no problems

arise. Minimal fuel capacity with one only nozzle: 15 kg/h - 171 kW.

kg/h

6194 3GB

3. INSTALLATION

3.1 FUEL OIL SUPPLY SYSTEMS

GRAVITY SYSTEM

SUCTION SYSTEM

LOOP SYSTEM (max loop system 3 bar)

Pump priming:

loosen the cap of the vacuometer fitting

(5, fig. 1) and wait for the fuel flow.

H: Difference in height

L: Length of the suction tube

For fuel oil with viscosity max. 7°E at 50°C.

D2720

max. 30m

metres

L metres

diam.

1” gas

diam. 1

1/4” gas

0610

0,5 11 17

11624

1,5 21 31

22638

Not advised, to be used only if there is a

previously existing system.

Never exceed the max. vacuum of 0.5 bar

(38 cm Hg) measured at the vacuometer

fitting (5, fig. 1).

The pipes should be perfectly airtight.

When the tank is placed below of the burn-

er level, the return pipe should arrive at the

same level of the suction pipe.

In this case the foot valve is not required.

For light fuel oil with viscosity max. 7°E at 50°C.

D2721

max. 30m

metres

L metres

diam. 1

1/4” gas

diam. 1

1/2”

02245

0,5 19 39

11633

1,5 13 27

21021

2,5 7 15

30 8

1- Tank (properly heated for heavy oil) 5- Transfer pump

2- Filter (with resistor for oil > 7°E / 50°C) 6- Manometer

3- Burner 7- Burner pump

4- Air dampers for excluding burner (coupled) 8- Pressure adjuster

For heavy oil with viscosity up to 50°E/50°C.

Notice: to ensure proper fuel flow all the pipes have to be properly sized, insulated and heated. (elec. re-

sistor or steam or hot water).

Warning: before starting up the burner make sure that there is no obstruction in the pipes,

any obstruction may damage the sealing of the pump.

D2631

6194 4GB

3.2 BURNER ELECTRICAL SYSTEM (made in the factory)

531

624

789123456

531

642

MV2HS1ST0

ST1

ST2

411 85918 13 17 10

1612 15

RT1

531

642

TAV

RMO88.53A2

L1R

L2R

L3R

N L1L2L3 LN S3 T130 T2T6T8

V21

V22

L1P

L2P

L3P

CMP

CMV

CMP Pump motor contact maker

CR Pre-heater contact maker

FSuppressor

FR photocell

MB Burner terminal strip

MP Pump motor

MV Fan motor

PA Air pressure switch

R1 Atomiser holder resistor

R2 Pump resistor

R3 Valve assembly resistor

RMO Electrical control box

RT Fan motor thermal relay

RT1 Pump motor thermal relay

SPre-heater tank

SM Servomotor

TA Ignition transformer

TB Burner earth

TE Regulation thermostat and start-up enabling

signal

Tm Minimum contact thermostat

Tm Maximum contact thermostat

V1 Oil valve for 1st stage

V2 Oil valve for 2nd stage

2615

6194 5GB

3.3 ELECTRICAL CONNECTIONS TO THE BURNER TERMINAL STRIP (to be made by the installer)

FASTENING OF THE ELECTRICAL WIRES

All the wires, to be connected to the burner terminal strip (16, fig. 1) shall pass through the cable entries

(17, fig. 1), see the figure below.

Further prospective signals or controls can be connected to the burner terminal strip by presheared disk inserting

a common cable gland for the passage and the clamping of the leads. To ensure the IP 40 degree of protection

in compliance with EN 60529 close the passage holes of the cables and any unused entry leads with appropriate

disks.

NOTES

- Make a safe earth connection.

- Verify the burner stop by opening the boiler thermostat and the burner lock-out by darkening the photocell.

PREHEATER

CONNECTIONS

2616

230V 400V

A Ampere 10 6

B Ampere 6 4

C Ampere 16 10

D sq. mm 1.5 1.5

E sq.mm 2.5 1.5

F sq. mm 4 2.5

D2692

RESISTORS

NOTE

yWire section: min. 1 sq. mm.

(Unless required otherwise by local standards and legis-

lation).

yFor supply at 230V make the triangle connection on

the pre-heater and on the motor (the original connec-

tion is “star” for 400V).

TWO STAGE OPERATION

This is achieved by the remote control device connected to

terminals 5-6 (removing the jumper), that controls 2nd

valve.

IN Manual stop switch

MB Burner terminal strip

HLock-out signal

TL Limit remote control

TR Regulation remote control

TS Safety control device system

D2635

1- Single phase pre-heated resistor

power supply: . . . . . . . . . . . . . . . . . . . . . .cable entry Pg 21

2 - Motor three phase supply: . . . . . . . . . . . . .cable entry Pg 16

3 - Single phase power supply and

safety thermostat: . . . . . . . . . . . . . . . . . . .cable entry Pg 13.5

4- Control thermostat: . . . . . . . . . . . . . . . . . .cable entry Pg 13.5

5- 2nd stage thermostat: . . . . . . . . . . . . . . . .cable entry Pg 13.5

6194 6GB

4. OPERATION

4.1 CHOICE OF NOZZLES

Recommended nozzle:

- Monarch F 80 H0.

4.2 PUMP PRESSURE

Recommended pressure:

- Light oil: 20 bar

- Heavy oil: 25 bar

The flow rate of the nozzes indicated in the table are

nominal, obtained for a light oil having viscosity from 3 to 5°E

at 50° C pre-heated at 100°C. The actual flow rate may vary

by ± 5% against the rated flow rate.

if flow rate values between those indicated in the table are

required, it is possible to vary the pump pressure or arrange

the nozzles differently.

The pump leaves the factory set at 20 bar.

4.3 COMBUSTION HEAD ADJUSTMENT

Turn the screw A, fig. 2 to the set-point, shown in the diagram,

lines up with sleeve B, fig. 2.

4.4 ADJUSTMENT OF THE AIR DAMPER MOTOR

STOP - Blue lever

This lever leaves the factory vertically positioned and corre-

sponds to the complete closure of the air damper.

A partial opening of the air damper might be obtained by

moving this lever leftwards (+on the plate).

The new position of the air damper is detectable when the

burner is off.

Do not exceed the position of the orange lever for the 1st

stage.

1st STAGE - Orange lever

The orange lever controls the air damper position for the first

flame, it is adjustable both for opening and closing.

2nd STAGE - Red and black levers

The red lever controls the air damper position for the second

flame, it is adjustable both for closing and opening.

The black lever controls the opening of the second oil valve

and it must always anticipate - for a bit - the red lever, but

never the orange one.

D2638

Black lever

Red lever

Orange lever

Blue lever

Opening +–Closure

Nozzle

GPH (45° - 60°)

20 bar

kg/h

25 bar

kg/h

2.50 + 2.50 30.00 34.00

3.00 + 3.00 36.00 40,60

3.50 + 3.50 42.00 47,40

4.00 + 4.00 48.00 54,20

4.50 + 4.50 54.00 61.00

5.00 + 5.00 60.00 –

kg/h

Set-point

D2693

D2637

Set-point 4

Fig. 2

6194 7GB

4.5 AIR PRESSURE SWITCH

4.6 ATOMISATION TEMPERATURE ADJUSTMENT

Adjustment thermostat - maximum value - minimum value

Adjustment thermostat prevents the burner start up if the fuel temperature has not reached the required value

for a better atomisation as indicated in the diagram below.

Example

Fuel oil with viscosity of 7 °E at 50 °C is pre-heated to approximately 110 °C.

The thermostat has to be generally set at a value higher than the required one (120°C indicated on the knob

to get approximately 100°C at the nozzles).

The value has to be read after some minutes of operation and later the necessary adjustments might be carried

out.

Minimum value contact thermostat intervenes by stopping the burner if the fuel temperature decreases

under the value necessary for better combustion.

Maximum value contact thermostat switches off the resistors when in case of failure of the adjustment

thermostat, the temperature increases inside the pre-heater. In case of abnormal temperature, make sure

of the regular functioning of control thermostat and of the resistor in contact with the probe of the thermostat.

The thermostat is calibrated by the factory at 180 °C.

D2719

Adjusting knob

of thermostat

Pre-heater

Purge

Atomisation temperature

Viscosity at 50° C

sq.mm/s °E D2694

D521

Regulate the air pressure switch after carrying out all

the other regulations of the burner with the air pres-

sure switch adjusted at the beginning of the scale.

With the burner operating at MIN power, increase the

pressure of the adjustment by slowly turning the

appropriate knob clockwise until the burner locks out.

Then turn the knob counterclockwise to a value equal

to about 20% of the regulated value and then check

the correct burner start up. If the burner locks out

again turn the knob a bit further in a counterclockwise

direction.

6194 8GB

IMPORTANT NOTES

Pre-heater thermostat replacement.

Replace the probe of the new thermostat, after loosen-

ing the fixing screws of the plates pack, taking care of

better contact between the probe and the pipes and the

resistor, see drawing. The same precautions should be

taken when renewing the resistors in contact with the

thermostat probes.

If during operation exceptional changes or excessive

temperatures should be detected, verify the continuity

of the resistor, using and ohmmeter, in contact with the temperature probe (approximately 35 Ohm).

Use only filters with a groove on the tightening hexagon.

NOTE

yThe pre-heater might be provided with a second thermostat in contact of maximum value.

This thermostat can be used to act as a switch on an external contact maker to cut off the current to the pre-

heater if there is excess temperature (kit code no. 3000800).

yBefore burner start-up, verify that the pump is filled with fuel to prevent it running empty for too long.

yFilter cleaning:

periodically clean the filters in order to avoid any burner operation problems.

ySupply line filter:

positioned on the suction line, it causes the increase of the vacuum in the pump with the consequent flow of

gas and noise. Do not exceed the vacuum of 38 cm Hg (5 m W.c.), measured at the vacuometer fitting

(5, fig. 1).

yPre-heater filter (10, fig. 1):

positioned on the suction line, it causes a decrease of the atomising pressure which is detectable by use

of a manometer (12, fig. 1).

MANOMETER PROTECTION VALVE

After atomisation pressure has been checked during opportunity, the manometer should be turned off (12, fig. 1)

to avoid the pressure shocks that it might be subjected to each time the burner is turned on.

Close the protection valve when the burner is not in operation and the manometer indicates 0 bar.

Thermostat probe

Resistor

Aluminium plate pipes

Plate

D2751

6194 9GB

4.7 BURNER START-UP PROGRAMME

Motor lock-out

It is caused by the thermal motor overload relay if overload or no phase occurs

4.8 ECOLOGICAL OIL BURNERS

WARNING

In all cases the transition from normal fuel oil to ecological fuel oil requires:

yThe tank to be emptied of normal fuel oil.

yCleaning of the cistern and the pipes that carry the fuel oil to the burner.

yApplication of a filter if there is not one already on the burner fuel line with a filtering grade of 0,3 mm maxi-

mum.

If this is not done, Riello S.p.A. declines all liability if the burner fails to work properly or wears out prematurely.

NOTES

These burners are the result of careful study that allows them to be used with ecological fuels as well; oils, that

in certain temperature and speed conditions, are particularly aggressive for the vital parts of the burner.

The objective has been achieved with the reduction of the transiting speed in some of the parts and an appropri-

ate choice of materials (in particular surface treatments) as well as a redefinition of the backlashes and coupling

tolerances.

The burners for ecological oils are very different from normal fuel oil burners because they have a separate

pump (worked by its own motor at 1400 rpm) and for the presence of double filtration between pump and nozzle.

4.9 EMULSIFIED FUEL OIL OPERATION

Lock-out because of no ignitionNormal

Thermostat

Motors

Ignition transformer

1st flame valve

2nd flame valve

Lock-out indicator

2894

D3435

WARNING

In the case of functioning with emul-

sified fuel oil it is necessary to

change the fitting on the burner (*)

with the one supplied with it.

Ce manuel convient aux modèles suivants

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