ferolli SUN G50, SUN G70 Operating, Installation And Maintenance Instructions

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Page 1

SUN G50 - G70

BRUCIATORE DI GASOLIO OIL BURNER BRULEUR DE FUEL HEIZÖLBRENNER QUEMADOR DE GASÓLEO

ISTRUZIONI PER L’USO L'INSTALLAZIONE

E LA MANUTENZIONE .............................................. 2

OPERATING, INSTALLATION

AND MAINTENANCE INSTRUCTIONS .................... 22

MODE D’EMPLOI,

INSTALLATION ET ENTRETIEN ............................... 42

BEDIENUNGS-, INSTALLATIONS-

UND WARTUNGSANLEITUNG................................. 62

INSTRUCCIONES DE USO, INSTALACIÓN

Y MANTENIMIENTO ................................................ 82

cod. 3544564/0 ediz. 07/2003

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SUN G50 - G70

Italiano

English

• Carefully read the warnings in this instruction booklet, as they provide important indications on the safety of installation, operation and maintenance.

• The instruction booklet is an integral and essential part of the product and must be carefully kept by the user for future reference.

• The installation and maintenance operations must be performed according to the standards in force, the instructions of the manufacturer and must be carried out by professionally qualified personnel.

• Incorrect installation or poor maintenance may cause damage to people, animals or things. The manufacturer declines all liability for damage deriving from errors in the installation and operation of the

appliance, and in any case from the failure to observe the instructions provided by the manufacturer.

• Before performing any cleaning or maintenance operations, disconnect the appliance from the mains power supply using the system switch and/or the corresponding on-off devices.

• In the event of faults and/or poor operation of the appliance, it should be deactivated. Do not attempt to repair the appliance. Contact professionally qualified personnel only.

• After having removed the packaging, check that the contents are intact.

• The parts of the packaging must not be left within the reach of children, as they are potential sources of danger.

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Deutsch

Certification

The CE Mark attests that Ferroli appliances conform to the requirements specified in the corresponding European directives.

In particular, this appliance conforms to the following EEC directives:

• Directive 92/42, Efficiency, accepted into Italian law by Presidential Decree no. 660, 15.11.96

• Directive 73/23, Low Voltage, (amended by no. 93/68)

• Directive 89/336, Electromagnetic Compatibility (amended by no. 93/68) accepted into Italian law by Presidential Decree no. 615, 15/11/96

This symbol indicates “Warning” and is placed near all warnings regarding safety. Such provisions must be strictly adhered to so as to avoid danger and damage to people, animals and things.

This symbol highlights a note or an important warning

1. Operating instructions ........................................................................ 23

2. Installation........................................................................................... 24

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3. Service and maintenance..................................................................... 31

4. Characteristics and technical specifications ........................................ 39

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SUN G50 - G70

1. OPERATING INSTRUCTIONS

1.1 Introduction

Dear Customer, Thank you for choosing SUN G50 - G70, a twin-stage Ferroli burner featuring advanced design, cutting-

edge technology, high reliability and quality construction. The SUN G50 - G70 is an oil burner, whose compact dimensions and original design make it ideal for use

with most of the boilers currently present on the market. The attention paid to its design and industrial production has resulted in a product that is well-balanced with very low CO and NOx emissions and a very silent flame.

1.2 Operating instructions

The operation of the burner, once correctly installed and adjusted, is completely automatic and does not require any intervention by the user. In the event of no fuel or operating anomalies, the burner stops and shuts-down (the red light on the reset button turns on). It is recommended to replete the supply of fuel before it runs out completely, to avoid the inlet of air (irregular operation of the burner) or the loss of prime of the pump (in which case the assistance of the service centre is required).

If the fuel tank is outside, in areas where the temperature falls below -10 °C, the tank and fuel supply pipes must be adequately protected. Use winter oil or add a specific anti-freeze.

Make sure that the room where the burner is installed is free of inflammable objects or materials, corrosive gas or volatile substances, and is not dusty. Dust, in fact, is sucked in by the fan and sticks to the blades of the rotor and reduces air flow, or alternatively blocks the flame stability disk, compromising efficiency.

Burner

reset

button

fig. 1

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English

Français

Do not allow the burner to be tampered with by inexpert persons or children.

1.3 Maintenance

Make sure that maintenance is performed on the burner periodically, at least once a year. The maintenance operations must be performed by qualified and specialist personnel according to the indications contained in chapter 3.

1.4 Anomalies

If the burner does not ignite and the red light on the reset button is not on, check that there is electrical power, that the heating system switch is on, that the fuses are intact and that there is an effective request for heat from the boiler.

If the burner is still off (red light on the reset button on), press the reset button to reset operation. The burner will attempt to ignite. If it shuts down again, check that there is fuel in the tank and that the manual valves located on the oil supply pipe are open. If these checks do not resolve the problem, contact the service centre.

If noise is produced during the operation of the burner, contact the service centre.

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2. INSTALLATION

SUN G50 - G70

Italiano

2.1 general instructions

English

2.2 installation in the boiler

Français

This appliance must only be used for the purposes it has been specifically designed for. This appliance may be applied, according to its characteristics, performance and heating capacity, to water boilers, steam boilers, diathermic oil boilers and other utilities, as expressly envisaged by the manufacturer of such. All other uses are considered improper and thus dangerous.

The appliance may not be opened nor its components tampered with, except for the parts included in the maintenance operations. The appliance may not be modified to alter its performance or use.

If the burner is fitted with optional devices, kits or accessories, only original products should be used.

THE BURNER MUST ONLY BE INSTALLED AND ADJUSTED BY QUALIFIED AND SPECIALIST PERSONNEL, IN COMPLETE COMPLIANCE WITH ALL THE INSTRUCTIONS REPORTED IN THIS TECHNICAL MANUAL, THE LEGAL STANDARDS IN FORCE, THE PRESCRIPTIONS OF THE UNI AND CEI STANDARDS AND ANY LOCAL STANDARDS, AND ACCORDING TO THE RULES OF GOOD PRACTICE.

Place of installation

The room in which the boiler and burner are installed must have openings to the outside according to the standards in force. If the same room features a series of burners or air inlet devices that can operate at the same time, the ventilation openings must be large enough for the simultaneous operation of all the appliances.

The place of installation must be free of inflammable objects or materials, corrosive gas, dust or volatile substances that, sucked in by the fan, may block the internal tubing of the burner or the combustion head. The environment must be dry and not exposed to rain, snow or frost.

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Burner flange

Ø225

Italiano

Ø182

260

fig. 2a

Assembly sequence

1) Drill the plate closing off the

combustion chamber, observing the dimensions given in Fig. 2a.

2) Separate the flange/nosepiece “A” from the burner body by unscrewing the nut “B”.

3) Secure the flange/nosepiece “A”

to the boiler body with the screws “C”.

4) Take off the burner casing “D” by unscrewing the two screws

“E”.

5) Unscrew the couplings “L” and take out the copper pipes “M”.

6) Slightly unscrew the two screws “F”, turn and extract the combustion head “G”.

7) Insert the burner body onto the

pin “H” and secure it onto the flange with the screw “B”.

8) Fit the combustion head back on after checking that the nozzles are suited to the power of the boiler.

9) Connect the oil hoses to the pump.

10) Check the settings.

11) Fit the casing “D” back on and secure it with the screws “E”.

Ø290

260

English

Français

Deutsch

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fig. 2b

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SUN G50 - G70

2.3 Fuel supply

General instructions

The burner must be supplied by the type of fuel it is set for, as shown on the rating plate on the appliance and in the table of technical specifications in Chap. 4.3 of this manual.

The pipe supplying fuel to the burner must be perfectly sealed, to avoid air entering into the pump, must be fitted with a filter upstream of the burner, and all the safety and control devices required by the standards in force. There must be no impurities or processing residues inside the pipe: clean the pipes before using.

In addition, before operating the burner, make sure that the fuel return pipe is not blocked. Excessive backpressure will break the pump seal device.

The tank must be positioned as required by the standards in force, and must be built and installed in a way that no water or impurities may enter. The tank must be carefully cleaned before filling with fuel.

The tank and supply pipe must be protected from frost.

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Deutsch

Hydraulic circuit

The burner is fitted with a self-suction pump that can supply itself autonomously, within the limits shown below. The fuel supply circuits can be divided into 3 types, as shown in the following figure:

A Suction feed B Siphon feed C Ring feed

For each type of system there is a table for sizing the supply pipe in relation to the length (L) of the inlet pipe, and the difference in height (H) from the tank. Do not exceed the MAX distances shown in the figures so as not to excessively stress the pump seal devices.

fig. 3a

(m)

Øi 12 mm. Øi 14 mm.

0 0,5 1,0 2,0 3,0 4,0

36 32 28 19 10

L (m)

74 66 56 42 26 10

Øi 16 mm.

137 123 109

81 53 25

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fig. 3b

H (m)

Øi 12 mm Øi 14 mm

0 0,5 1,0 2,0 3,0 4,0

36 40 44 58 62 71

L (m)

74 82

90 106 122 138

Øi 16 mm

137 150 150 150 150 150

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Nota: for each curve or gate valve, add 0.25

metres to the length of the pipe (pressure drop).

L Total length of the inlet pipe, including the

vertical sections

H Difference in height

fig. 3c

Connection to the pump

The burner leaves the factory with the internal pump bypass closed, that is, the burner is fitted for twopipe connection. Remove the caps and connect the two flexible pipes to the pump inlet (1) and return (2), as shown in Figure 4, making sure the flexible pipes are not twisted and that they are positioned so that they will not be stepped on or come into contact with the hot parts of the boiler.

If the internal pump bypass needs to be used for single-pipe connections, remove the bypass screw (10) and cap the return fitting (2) on the pump, connecting only the flexible pipe to the inlet fitting (1).

Øi Internal diameter of pipes P Auxiliary pump

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English

Français

If the pump is operated with the return closed and the bypass screw inserted, it will be damaged immediately.

In particular, with single-tube systems, if the fuel inlet pipe is initially empty, the air contained in the pipe must be vented for the fuel pump to be primed. It is recommended, before igniting the burner, to loosen the pressure gauge connection (5) screw on the pump and then perform the ignition cycle. When the oil comes out of the screw, the pump is primed. Switch off the burner and tighten the screw.

Key

1 Suction 2 Return with internal by-pass screw 3 Delivery to the 1st stage nozzle 4 Delivery to the 2nd stage nozzle 5 Pressure gauge connections 6 Vacuum gauge connection 7 Pump pressure adjustment 8 1st stage coil

9 2nd stage coil 10 By-pass screw 11 1/8” reduction with hole Ø1 12 1st stage nozzle 13 2nd stage nozzle

4 11

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fig 4

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SUN G50 - G70

2.4 Nozzle and Electrodes

Choosing the nozzle

Determine the required fuel flow-rate, based on the heat input of the boiler and the minimum heat output (Hi) of the fuel used (ref. technical data table in chap. 4). Based on the flow-rate calculated, use the table below, according to the pump pressure, to determine the most suitable nozzle size (in GPH). The bold values in the table are the most suitable for burner operation.

Both nozzles should be chosen from the ones indicated in the following table. The first nozzle determines the burner flow rate in the 1st stage. The second nozzle words together with the first one and both determine the burner flow rate in the 2nd

stage. The flow rates of the 1st and 2nd stage must come within the values given in the technical data table in

paragraph 4.3. It is recommended for the 1st-stage nozzle to have a delivery of between 55-60% of the total flow rate.

English

Nozzle

Français

Deutsch

GPH

3,50 4,00 4,50 5,00 5,50 6,00 6,50 7,00 7,50 8,30

9,50 10,50 12,00 13,80 15,30

The two nozzles supplied can be used when they correspond to the required flow rate. If they do not, they should be changed with another two whose delivery is suited to the system.

Oil nozzle flow-rate table

The values given in the table are approximate since it is necessary to bear in mind that the nozzle deliveries may vary by ± 5%.

Pump pressure (bar)

8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

11,90 13,60 15,30 17,00 18,70 20,40 22,10 23,79 25,49 28,21 32,29 35,69 40,80 46,90 52,00

12,62 14,42 16,22 18,03 19,83 21,63 23,44 25,24 27,04 29,93 34,25 37,86 43,30 49,80 55,20

13,30 15,20 17,10 19,00 20,90 22,80 23,70 26,60 28,50 31,54 36,10 40,06 45,60 52,40 58,10

13,95 15,94 17,94 19,93 21,92 23,92 25,91 27,90 29,90 33,08 37,87 41,73 47,80 55,00 61,00

14,57 16,65 18,73

20.82

22.90 24,98 27,06 29,14 31,22 34,55 39,55 43,74 50,00 57,50 63,70

15,17 17,33 19,50 21,67 23,83 26,00 28,17 30,33 32,50 35,97 41,17 45,41 52,00 59,80 66,30

15,74 17,99 20,24 22,48 24,73 26,98 29,23 31,48 33,73 37,32 42,72 47,20 54,00 62,10 68,80

16.29 18,62 20,95 23,27 25,60 27,93 30,26 32,56 34,91 38,63 44,22 48,90 55,90 64,20 71,10

16,83 19,23 21,63 24,04 26,44 28,84 31,25 33,65 36,05 39,90 45,67 50,50 57,70 66,30 73,60

17,34 19,82 22,30 24,78 27,25 29,73 32,21 34,69 37,16 41,13 47,07 52,00 59,50 68,40 75,80

17,85 20,40 22,95 25,49 28,04 30,59 33,14 35,69 38,24 42,32 48,44 53,50 61,20 70,40 78,00

18,34 20,95 23,57 26,19 28,81 31,43 34,05 36,67 39,29 43,48 49,77 55,00 62,90 72,30 80,20

18,81 21,50 24,19 26,87 29,56 32,25 34,94 37,62 40,31 44,61 51,06 56,40 64,50 74,30 82,20

19,28 22,03 24,78 27,54 30,29 33,04 35,80 38,55 41,31 45,71 52,32 57,80 66,10 76,00 84,30

19,73 22,55 25,37 28,19 31,00 33,82 36,64 39,46 42,28 46,79 53,55 59,20 67,60 77,80 86,20

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Flow-rate at the outlet in kg/h

Table of spray values

The nozzles are available with different sprays, identified by one or more letters, depending on the manufacturer. The table shows the most suitable types of spray for the burner.

Type of nozzle

Fluidics

SF - S

SPRAY Angle

60°

Type of cone

Full

Delavan

Monarch

Danfoss

Steinen

S - SS

Hago

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SUN G50 - G70

Fitting nozzles

After determining the right nozzles to use, go ahead and fit them as follows:

1 Unscrew the screws “A” 2 Take off the casing “B” 3 Using a wrench, unscrew the couplings “C” by half a turn 4 Take the copper tubes “D” out of the couplings 5 Slightly unscrew the screws “E” 6 Turn and take out the head/nozzle-holder assembly “F” 7 Unscrew the two screws “G” 8 Using a wrench, unscrew the nozzles “I”

Italiano

English

Nozzle

2nd stage

Nozzle

1st stage

Français

Deutsch

fig. 5

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SUN G50 - G70

Electrode positioning

After fitting the nozzles, check the electrodes and baffle are in the right positions, according to the distances shown below.

The distances should be checked after any work done on the head.

Combustion head

5,5

2,5

Français

2.5 Electrical connections

Deutsch

5,5

2215

The burner is fitted with a multi-pole socket for the electrical connections; refer to the wiring diagram in Chapter “4 Characteristics and technical specifications” for the connections. The following connections are to be performed by the installer:

• power line

• thermostat line

• any shut-down and/or hour counter lights

fig. 6

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The length of the connection cables must allow the burner, and the boiler door, if required, to be opened. In the event of faults involving the burner power cable, it should only be replaced by specialist persons.

The burner should be connected to a single-phase, 230 Volt-50 Hz electrical line.

Have professionally qualified personnel check the efficiency and the suitability of the earth system; the manufacturer is not responsible for any damage caused by the failure to earth the system. Also check that the electrical system is adequately rated for the maximum power absorbed by the appliance, indicated on the boiler rating plate. The correct polarity must be respected (PHASE: brown wire / NEUTRAL: blue wire / EARTH: yellow - green wire) in the electrical connections.

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SUN G50 - G70

3. SERVICE AND MAINTENANCE

All the adjustment, commissioning and maintenance operations must be performed by Qualified Personnel, in compliance with the standards in force. The local sales organisation and Customer Service Centre is available for any further information.

FERROLI S.p.A. declines all liability for damage to persons and/or things deriving from tampering with the appliance by non-authorised persons

3.1 Adjustments

Air lock and head adjustments

The head adjustment depends on the burner’s delivery and is performed by turning the adjustment screw “B” clockwise or anticlockwise.

This changes the position of the baffle in relation to the nosepiece and accordingly the air passage.

To adjust the air delivery, turn the screw “C” for the 2nd stage and “D” (orange cam) for the 1st stage.

To limit dispersion to the flue with the boiler turned off, the burner is equipped with a gravity-operated air lock that shuts automatically when the burner stops.

Combustion air adjustments

The air lock is operated by the servomotor. The fully open/shut positions are adjusted on the

cams, turning anticlockwise to increase the opening of the lock and clockwise to decrease it.

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English

Français

Cams

Blue cam - Fully closed position 0°.

do not alter Orange cam - 1st stage air adjustment. Red cam - Fully open position 85°.

do not alter

Black cam - Signal to open the

2nd-stage solenoid valve.

Key A Head adjustment pointer B Head adjustment screw C 2-nd stage air adjustment screw D Servomotor for the 1st-stage adjustment and signal to open the solenoid valve

Black cam

Orange cam

fig. 7

Deutsch

Red cam

Blue cam

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SUN G50 - G70

To perform a preliminary adjustment of head and air damper during installation (before commissioning and consequently calibrating the appliance using instruments), use the graph below:

Italiano

GN4.10 GN4.11 GN4.12 GN4.13 GN4.14 Prextherm N 400 Prextherm N 500 Prextherm 550

English

Prextherm 620 Prextherm 800

Model

Heat

output

MaxkWmin

388

229

452

266

516

309

600

352

695

416

435

279

541

345

598

359

674

404

870

522

Burner

G50 G50 G50 G70 G70 G50 G50 G70 G70 G70

Nozzles

1st stage

4,5

5 6

7 8,5 5,5 7,5

7 8,5

10,5

2nd stage

3,5

5 5,5 3,5 4,5

5 5,5

Pump

pressure

bar

12 14 13 12 12 12 11 12 12 12

Servomotor

1st stage

12° 13° 14°

8° 10° 14° 16°

8° 10° 15°

air

2nd stage

10 17 20 10 15 20 25 10 15 25

15° 15° 20° 15° 15° 15° 15° 15° 15° 20°

L (mm)

27 24 22 22 22 23 22 22 22 22

Adjusting pump pressure

The pressure of the pump is factory-set to 12 bars, for optimum operation, and normally should not be modified. Nonetheless, if under specific circumstances a different pressure needs to be set, once having attached the pressure gauge and ignited the burner, use the adjustment screws “6” indicated in fig. 4. In any case, it is recommended to keep within the range 10 - 14 bars.

Français

3.2 Commissioning

Deutsch

Checks to be performed on first ignition, and after all maintenance operations that involve the disconnection of the appliance from systems or intervention on the safety devices or parts of the burner:

Before igniting the burner

• Check that the burner is correctly fastened to the boiler, and the preliminary adjustments described previously have been performed.

• Make sure that boiler and the system have been filled with water or diathermic oil, that the valves in the water circuit are open and that the flue gas exhaust pipe is free and correctly sized.

• Check that the boiler door is closed, so that the flame only propagates inside the combustion chamber.

• Fit the pressure gauge and the vacuometer to the pump (removed before operation).

• Open the gate valves in the oil pipes, making sure that there is fuel in the tank and that the return pipe is not blocked. Attention: Blockages may cause the pump seal device to break.

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Igniting the burner

• Connect electrical power by closing the main switch upstream of the burner

• Close the thermostat line (boiler/room)

• Reset the appliance (pressing the red button)

• Operation starts according to the diagram of fig. 9:

1 The burner motor will start turning, together with the pump: the oil fed in is completely sent to the

return. The ignition transformer is activated at the same time.

2 The following phases are performed: pre-ventilation of the furnace, pre-washing of part of the oil

circuit, pre-ignition, with discharge between the tips of the electrodes.

3 At the end of the pre-washing phase, the appliance opens the electromagnetic valve: the oil reaches

the nozzle, from where it is sprayed. Contact with the discharge between the electrodes ignites the flame. At the same time, the safety time starts, within which the photo cell must detect the flame.

4 If the photo cell does not detect the flame, the burner shuts-down (the red light comes on).

Wait around 15 seconds, reset and repeat the ignition cycle.

Operating sequence

Thermostats

motor

1st-stage

solenoid valve

2nd-stage

solenoid valve

Ignition

transformer

Photo-cell

AB CD

R W SB

BV1

BV2

t3n

TSA

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English

Français

Output signal

Input signal request

fig. 9

Key

A Start of commissioning for burners with no pre-heater

B Flame ignition time C Operation D Stop for R adjustment

t1 Pre-ventilation time t3 Pre-ignition time

t3n Time after ignition

t4 Interval between flame signal and BV2 supply

TSA Safety time on starting

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LMO24 fault-diagnosis and operation

The burner release button “EK” is used to reset the burner unit and to turn the faultdiagnosis functions on and off.

English

Français

The multicoloured LED is used for both types of fault diagnosis. The “EK” button and the LED are located under the transparent cap of the release

Red Yellow

button.

Green

Two types of fault diagnosis can be used.

1 Visual fault diagnosis - The burner’s operating status or the cause of the fault is

displayed.

2 Interface fault diagnosis - Using the OCI400 interface and the ACS400 software or a fume

analyzer.

Visual Fault Diagnosis

During normal operation, the various operating statuses are shown by the colour combinations as shown in the table below.

Interface fault diagnosis is activated by pressing the burner release button for at least 3 seconds. If this mode gets turned on accidentally, a weak red light starts blinking; to go back to the normal mode, just press the Reset button again for at least 3 seconds.

The passage from one mode to the other is shown by the yellow LED blinking.

Operating position

Visual fault diagnosis

Operating position

PC/analyzer

interface

fault diagnosis

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Colour code table

Colour code table during the ignition phase

States Colour sequence Colours

Pre-ventilation Ignition phase Blinking yellow Operation, flame correct Green Operation, flame defective Blinking green Low voltage Yellow - Red

Foreign light in pre-ventilation

Fault diagnosis with interface

- Off

- Yellow

- Green

- Red

- Continuous

Yellow

RedShutdown

RedFault display (see fault table) Green - Red

Weak red LED blinking

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Fault table

Possible cause

2 blinks

3 blinks

4 blinks

5 blinks

6 blinks

7 blinks

8 blinks

9 blinks

10 blinks

Red light blinking

Free

Faults with the wiring or inside the unit

Free

No flame during operation 1 fault with the fuel valves 2 fault with the photo-cell 3 no oil, wrong burner setting

No flame at the end of the safety time 1 fault with the fuel valves 2 fault with the photo-cell 3 no oil, wrong burner setting

Foreign light during pre-ventilation

“AL”

to the

terminal 10

Off

Fault Diagnosis

After shutdown, the red light stays on. In this condition, after pressing the unit’s release button for at least 3 seconds, visual fault diagnosis is

activated (see fault tables). On pressing the release button again for at least 3 seconds, interface fault diagnosis is activated .

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English

Shutdown

status

Shutdown

status

Visual fault diagnosis

Blinking

Fault codes

Shutdown

status

Opening

Français

Deutsch

During the check on the causes of the shutdown, the unit’s outputs are turned off. The burner stays off. Press the release button for approximately 1 second to reset the unit and restart the burner.

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Checks and adjustments during operation

• Connect a combustion analyser to the boiler outlet and operate the burner at full power for 10 minutes; in the meantime, check the operation of the flue gas exhaust pipe.

• Slowly adjust the air damper until reaching the required excess air value for operation, using the combustion analyser to check the O2 content in the flue gas. The O2 content in the flue gas should not be less than 2.5% (risk of polluting combustion) and should not exceed 5% (risk of difficulty in ignition and production of soot).

• Then perform a number of ignition cycles. In the event of flame pulsation or difficulty in igniting, adjust the head, again using the combustion analyser to check the O2 content in the flue gas.

• Make sure that the pressure in the combustion chamber corresponds to the value indicated by the manufacturer of the boiler

• Perform a complete analysis of the flue gas and check compliance with the limits set by the standards in force.

3.3 Maintenance

English

Français

Deutsch

The burner requires periodic maintenance, to be performed at least once a year by authorised enabled. The following basic operations must be performed:

• check and clean the internal parts of the burner, the tank and the boiler, as shown in the following paragraphs;

• complete analysis of combustion (after normal operation for at least 10 minutes) and check the adjustments are correct;

Opening the casing and removing the burner head

Before doing any cleaning or checking inside the burner, cut off the electricity supply to the burner with the system’s main switch. Shut off the fuel supply too.

Sequence

• Unscrew the screws “A” and take off the casing “B”. The internal components, pump, motor, lock, etc. are directly accessible.

• Unscrew the couplings “E” and extract the copper tubes “F”.

• Slightly unscrew the two screws “D”, turn and extract the combustion head “G”.

• It is now possible to remove the burner body too by simply unscrewing the nut “C”.

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fig 11

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Checking the parts and components

Pump

The pressure must be stable at the value set during installation, and in any case between 10 and 14 bars. No noise must be produced.

In the case of instable pressure or noisy pump, disconnect the flexible pipe from the line filter and feed in the fuel from a tank located near the burner. This identifies whether the cause of the anomaly is the inlet pipe or the pump.

Filters

Check and clean or replace, if necessary, the filters in the line, pump and nozzle. If there is rust or other impurities in the pump filter, use a separate pump to remove water and other

impurities from the bottom of the tank.

Fan

Check that dust is not accumulated inside the fan and on the rotor blades: this reduces the air flow and causes, as a consequence, polluting combustion.

Combustion head

Check that all the parts of the combustion head are intact, not deformed by the high temperatures, free of impurities from the surrounding environment, and correctly positioned.

Nozzles

Avoid cleaning the hole of the nozzles, so as to not damage them Replace the nozzles every 2-3 years, or when necessary. Combustion must be checked when changing the

nozzle.

Photo cell

Clean the glass for dust. The photo cell is pushed into place; to remove it, simply pull it out.

Flexible pipes

Check that they are in good condition, that they have not been stepped on or deformed.

Tank

Every 5 years or so, remove the water from the bottom of the tank using a separate pump.

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English

Français

3.4 Troubleshooting

Problem Possibile causes/

The burner does not ignite

During pre-ventilation, the burner shuts down

The burner performs the preventilation and ignition cycle, but there is no flame and the burner shuts-down.