Riello RX35 S/PV H Quick start guide

20123803 (8) - 11/2020
Installation, use and maintenance instructions
Instrucciones de instalación, uso y mantenimiento
Premix gas burner for tunnel ovens
Quemador a gas premezclado para hornos de túnel
Modulating operation
Funcionamiento modulante
CODE - CÓDIGO MODEL - MODELO TYPE - TIPO
20042815 RX35 S/PV T 906T8
CODE - CÓDIGO HEAD ASSEMBLY - GRUPO CABEZAL
20045263 L = 2110
20067338 L = 1022
20095286 L = 1915
20095954 L = 1317
20110452 L = 1709
20115330 L = 1515
20117147 L = 1600
20131416 L = 2215
20174425 L = 2317
20179941 L = 1817
20095407 L = 1915 - 3 FLAME - 3 LLAMAS
20110544 L = 1709 - 3 FLAME - 3 LLAMAS
20117203 L = 1600 - 3 FLAME - 3 LLAMAS
20131419 L = 2215 -3 FLAME - 3 LLAMAS
20134436 L = 2110 - 3 FLAME - 3 LLAMAS
20174429 L = 2317 - 3 FLAME - 3 LLAMAS
20179957 L = 1817 - 3 FLAME - 3 LLAMAS
20157739 L = 1317 - 3 FLAME - 3 LLAMAS
GB
E

Translation of the original instructions
Traducción de las instrucciones originales

1 20053448
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Contents
1 Declaration.................................................................................................................................................................................. 3
2 Information and general warnings............................................................................................................................................ 4
2.1 Information about the instruction manual........................................................................................................................ 4
2.1.1 Introduction..................................................................................................................................................................... 4
2.1.2 General dangers............................................................................................................................................................. 4
2.1.3 Other symbols................................................................................................................................................................. 4
2.1.4 Delivery of the system and the instruction manual ......................................................................................................... 5
2.2 Guarantee and responsibility .......................................................................................................................................... 5
3 Safety and prevention................................................................................................................................................................ 6
3.1 Introduction..................................................................................................................................................................... 6
3.2 Personnel training........................................................................................................................................................... 6
4 Technical description of the burner ......................................................................................................................................... 7
4.1 Models available............................................................................................................................................................. 7
4.2 Destination country - Gas category ................................................................................................................................ 7
4.3 Technical data ................................................................................................................................................................ 7
4.4 Maximum dimensions..................................................................................................................................................... 8
4.5 Description of the burner ................................................................................................................................................ 9
4.6 Burner equipment ........................................................................................................................................................... 9
5 Installation ................................................................................................................................................................................ 10
5.1 Notes on safety for the installation................................................................................................................................ 10
5.2 Handling........................................................................................................................................................................ 10
5.3 Preliminary checks........................................................................................................................................................ 10
5.4 Generator plate............................................................................................................................................................. 11
5.5 Combustion head installation........................................................................................................................................ 11
5.6 Securing the burner to the tunnel oven......................................................................................................................... 11
5.7 Positioning the probe - electrode.................................................................................................................................. 12
5.8 Fuel supply ................................................................................................................................................................... 12
5.8.1 Gas train assembly....................................................................................................................................................... 12
5.8.2 Gas valve...................................................................................................................................................................... 13
5.8.3 Testing.......................................................................................................................................................................... 14
5.8.4 Ionisation current .......................................................................................................................................................... 14
6 Operation .................................................................................................................................................................................. 15
6.1 Notes on safety for the first start-up.............................................................................................................................. 15
6.2 Adjustments prior to ignition ......................................................................................................................................... 15
6.3 Burner start-up.............................................................................................................................................................. 15
6.4 Fan adjustment............................................................................................................................................................. 15
6.5 Gas valve adjustment ................................................................................................................................................... 15
6.6 Burner adjustment on tunnel oven................................................................................................................................ 16
6.7 Adjusting the three-flame head assembly..................................................................................................................... 17
6.8 Operating programme................................................................................................................................................... 18
6.8.1 Normal operation .......................................................................................................................................................... 18
6.8.2 Lockout due to ignition failure ....................................................................................................................................... 19
6.8.3 Lockout due to a flame or flame simulation detected during pre-purging ..................................................................... 19
6.9 Recycle function if flame goes out during operation ..................................................................................................... 19
6.10 Restart function following firing failure .......................................................................................................................... 20
6.11 Control of the motor rpm............................................................................................................................................... 20
6.12 Control box reset (using built-in button)........................................................................................................................ 20
6.13 Control box reset (using remote connection)................................................................................................................ 20
7 Maintenance.............................................................................................................................................................................. 21
7.1 Notes on safety for the maintenance............................................................................................................................ 21
7.2 Maintenance programme.............................................................................................................................................. 21

20053448 2
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Contents
7.2.1 Maintenance frequency .................................................................................................................................................21
7.2.2 Safety test - with gas ball valve closed..........................................................................................................................21
7.2.3 Checking and cleaning ..................................................................................................................................................21
7.2.4 Safety components........................................................................................................................................................22
8 Faults / Solutions ......................................................................................................................................................................23
8.1 Start-up problems..........................................................................................................................................................23
8.2 Operating faults .............................................................................................................................................................24
9 Electrical wiring ........................................................................................................................................................................25
9.1 Electrical panel layout ...................................................................................................................................................26

3 20123803
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Declaration
1Declaration
Declaration of conformity in accordance with ISO / IEC 17050-1
Manufacturer: RIELLO S.p.A.
Address: Via Pilade Riello, 7
37045 Legnago (VR)
Product: Pre-mixed gas burner for tunnel ovens
Model: RX35 S/PV T
These products are in compliance with the following Technical Standards:
EN 12100
EN 676
and according to the European Directives:
MD 2006/42/EC Machine Directive
LVD 2014/35/UE Low Voltage Directive
EMC 2014/30/UE Electromagnetic Compatibility
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
Legnago, 21.04.2018 Executive General Manager
RIELLO S.p.A. - Burner Department
Research & Development Director
RIELLO S.p.A. - Burner Department
Mr. U. Ferretti Mr. F. Comencini

20123803 4
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Information and general warnings
2.1 Information about the instruction manual
2.1.1 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 Ser-
vice 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.
Symbols used in the manual
In some parts of the manual you will see triangular DANGER
signs. Pay great attention to these, as they indicate a situation of
potential danger.
2.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
2.1.3 Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page Page
Sec. Section
Tab. Table
2 Information and general warnings
DANGER
Maximum danger level!
This symbol indicates operations which, if not car-
ried out correctly, cause serious injury, death or
long-term health risks.
WARNING
This symbol indicates operations which, if not car-
ried out correctly, may cause serious injury, death
or long-term health risks.
CAUTION
This symbol indicates operations which, if not car-
ried out correctly, may cause damage to the ma-
chine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not car-
ried out correctly, lead to electric shocks with le-
thal consequences.
DANGER: FLAMMABLE MATERIAL
This symbol indicates the presence of flammable
materials.
DANGER: BURNING
This symbol indicates the risks of burns due to
high temperatures.
DANGER: CRUSHING OF LIMBS
This symbol indicates the presence of moving
parts: danger of crushing of limbs.
WARNING: MOVING PARTS
This symbol indicates that you must keep limbs
away from moving mechanical parts; danger of
crushing.
DANGER: EXPLOSION
This symbol signals places where an explosive at-
mosphere may be present. An explosive atmos-
phere is defined as a mixture - under atmospheric
conditions - of air and flammable substances in
the form of gases, vapours, mist or dust in which,
after ignition has occurred, combustion spreads to
the entire unburned mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must
be worn and kept by the operator for protection
against threats against safety and/or health while
at work.
OBLIGATION TO ASSEMBLE THE HOOD AND
ALL THE SAFETY AND PROTECTION DEVIC-
ES
This symbol signals the obligation to reassemble
the hood and all the safety and protection devices
of the burner after any maintenance, cleaning or
checking operations.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the
machine with respect for the environment.
IMPORTANT INFORMATION
This symbol indicates important information that
you must bear in mind.
This symbol indicates a list.

5 20123803
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Information and general warnings
2.1.4 Delivery of the system and the instruction
manual
When the system is delivered, it is important that:
the instruction manual is delivered 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 Assis-
tance Centre;
The system supplier must carefully inform the user about:
– the use of the system;
– any further tests that may be required before activating the
system;
– maintenance, and the need to have the system checked at
least once a year by a representative of the manufacturer
or another specialised technician.
To ensure a periodic check, the manufacturer recom-
mends the drawing up of a Maintenance Contract.
2.2 Guarantee and responsibility
The manufacturer guarantees its new products from the installa-
tion date, in accordance with the regulations in force and/or the
sales contract. At the moment of the first start-up, check that the
burner is integral and complete.
In particular, the rights to the guarantee and the responsibility will
no longer be valid, in the event of damage to things or injury to
people, if such damage/injury was due to any of the following
causes:
incorrect installation, start-up, use and maintenance of the
burner;
improper, incorrect or unreasonable use of the burner;
intervention of unqualified personnel;
carrying out of unauthorised modifications on the equipment;
use of the burner with safety devices that are faulty, incor-
rectly applied and/or not working;
installation of untested supplementary components on the
burner;
powering of the burner with unsuitable fuels;
faults in the fuel supply system;
use of the burner even following an error and/or an irregular-
ity;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the structurally estab-
lished flame;
insufficient and inappropriate surveillance and care of those
burner components most likely to be subject to wear and
tear;
the use of non-original components, including spare parts,
kits, accessories and optional;
force majeure.
The manufacturer furthermore declines any and every re-
sponsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
WARNING
Failure to observe the information given in this
manual, operating negligence, incorrect installa-
tion and carrying out of non authorised modifica-
tions will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

20123803 6
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Safety and prevention
3.1 Introduction
The burners have been designed and built in compliance with
current regulations and directives, applying the known technical
rules of safety and envisaging all the potential danger situations.
It is necessary, however, to bear in mind that the imprudent and
clumsy use of the equipment may lead to situations of death risk
for the user or third parties, as well as the damaging of the burner
or other items. Inattention, thoughtlessness and excessive confi-
dence often cause accidents; the same applies to tiredness and
sleepiness.
It is a good idea to remember the following:
The burner must only be used as expressly described. Any
other use should be considered improper and therefore dan-
gerous.
In particular:
it can be applied to boilers operating with water, steam, diather-
mic oil, and to other users expressly named by the manufacturer;
the type and pressure of the fuel, the voltage and frequency of the
electrical power supply, the minimum and maximum deliveries for
which the burner has been regulated, the pressurisation of the
combustion chamber, the dimensions of the combustion cham-
ber and the room temperature must all be within the values indi-
cated in the instruction manual.
Modification of the burner to alter its performance and desti-
nations is not allowed.
The burner must be used in exemplary technical safety con-
ditions. Any disturbances that could compromise safety must
be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is re-
sponsible for the machine and for the training of the people work-
ing around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, he undertakes to ensure that everyone knows
the use and safety instructions for his own duties;
Personnel must observe all the danger and caution indica-
tions shown on the machine.
Personnel must not carry out, on their own initiative, opera-
tions or interventions that are not within their province.
Personnel must inform their superiors of every problem or
dangerous situation that may arise.
The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence com-
promise operating safety. The manufacturer therefore
declines any and every responsibility for any damage that
may be caused by the use of non-original parts.
In addition:
3 Safety and prevention
WARNING
The manufacturer guarantees safety and proper
functioning only if all burner components are intact
and positioned correctly.
the user must take all the measures neces-
sary to prevent unauthorised people gaining
access to the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident pre-
vention systems are noticed, along with any
presumed danger situation;
Personnel must always use the personal pro-
tective equipment envisaged by legislation
and follow the indications given in this man-
ual.

7 20123803
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Technical description of the burner
4.1 Models available
Tab. A
4.2 Destination country - Gas category
Tab. B
4.3 Technical data
Tab. C
(1) Reference conditions: Air temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
NOTES:
– The requested protection level must be reached on the appli-
cation.
– Temperature and operation of the burner from -15 °C to
70 °C.
– Modulating model with signal 4 - 20 mA
– For particularly dirty environments, it is recommended to use
a filter or to canalize the air intake with a tube of Ø 80 mm and
a maximum length of 10 meters.
4 Technical description of the burner
Designation Voltage Code
RX35 S/PV T 230V/50-60Hz 20042815
Destination country Gas category Gas pressure
(mbar)
AT - CH - CZ - DK - EE - ES - FI - GB - GR - HU - IE - IT - LT - LV
NO - PT - SE - SK I2H 20
AT - BE - CH - CZ - DE - ES - FR - GB - GR - HU - IE - IT - PT - SI I3P 29
CZ - DE - DK - EE - ES - FI - FR - GB - GR - IE - IT - LU - NO - PT
SE - SI - SK I2R 20/25
FR I2Er 20/25
BE I2E(R) 20/25
LU - PL I2E 20
DE I2ELL 20
DE - EE - ES - FR - GB - GR - IT - NO - PT - SI - SK I3R 30
AT - BE - CH - CZ - DE - HU - FR - GB - GR - IT - PT - SI - NL - PL
RO - CY -DK - FI - SE I3B/P 30
IE I3P 30
Model RX35 S/PV T
Thermal power (1) kW
Kcal/h
6 -40
5,160 -34,400
Natural gas (Family 2) G20 Ncv: 9.45 kWh/Sm3 = 8,100 kcal/Sm3- Pressure 10 - 30 mbar
G25 Ncv: 8.125 kWh/Sm3 = 7,000 kcal/Sm3- Pressure 10 - 30 mbar
LPG (Family 3) G31 Ncv: 24.44 kWh/Sm3 = 21,000 kcal/Sm3- Pressure 10 - 30 mbar
G30 Ncv: 32.23 kWh/Sm3 = 2,770 kcal/Sm3 - Pressure 10 - 30 mbar
Electrical supply Single-phase, 220/230V ~ ±10% 50/60 Hz
Motor Max 7,000 rpm - 50/60 Hz
Ignition transformer Primary 220V/240 - 50/60Hz - Secondary 15 kV - 250 mAp

20123803 8
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Technical description of the burner
4.4 Maximum dimensions
The maximum dimensions of the burner and flange are shown in
Fig. 1.
Tab. D
* 3 flame version, Ø 64 mm.
20178
113
1/2"
288
249
75
Fig. 1
20048593
L
BA CD
E
Fig. 2
20048717
Code A B C D E L
20045263 106 85 1400 518 50 2110
20067338 22 76 600 324 50 1022
20095286 106 85 1206 518 50 1915
20095954 55 85 780 397 50 1317
20110452 106 85 1000 518 50 1709
20115330 106 85 900 424 50 1515
20117147 106 85 995 415 50 1600
20131416 106 85 1506 518 50 2215
20174425 210 85 1360 662 50 2317
20179941 210 85 860 662 50 1817
20095407* 106 85 1206 518 60 1915
20110544* 106 85 1000 518 60 1709
20117203* 106 85 995 415 60 1600
20131419* 106 85 1506 518 60 2215
20134436* 106 85 1400 518 60 2110
20174429* 210 85 1360 662 60 2317
20179957* 210 85 860 662 60 1817
20157739* 55 85 780 397 50 1317

9 20123803
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Technical description of the burner
4.5 Description of the burner
1 Reset button with lockout signal
2 Control box
3 Gas valve
4 Air/gas mixer in intake circuit
5 Flange
6 Motor/Fan
7 Combustion head with metal mesh
8 Ignition transformer
9 Adjustment No. of fan turns
10 7 pole socket
11 4-pole socket
12 Gas inlet
13 Flame inspection window
14 Electrode
15 Probe
16 Suppressor
17 Relay
4.6 Burner equipment
7 pin plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
2 pin plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Resistor 500 Ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
2
5
79
12
15
1
4
8
3
13
610
14
11
17 16
20048763
Fig. 3

20123803 10
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Installation
5.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner will
be installed, and arranging the correct lighting of the environ-
ment, proceed with the installation operations.
5.2 Handling
The packaging of the burner includes a wooden platform, so it is
possible to move the burner (still packaged) with a transpallet
truck or fork lift truck.
5.3 Preliminary checks
Checking the consignment
Checking the characteristics of the burner
Check the identification label of the burner, showing:
the model A)(Fig. 4) and type of burner B);
the year of manufacture, in cryptographic form C);
the serial number D);
the electrical supply data E);
the electrical power consumption F);
the types of fuel used and the relative supply pressures G);
the data of the burner’s minimum and maximum output pos-
sibilities H) (see Firing rate).
5 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
WARNING
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
The handling operations for the burner can be
highly dangerous if not carried out with the great-
est attention: keep any unauthorised people at a
distance; check the integrity and suitableness of
the available means of handling.
Check also that the area in which you are working
is empty and that there is an adequate escape
area (i.e. a free, safe area to which you can quick-
ly move if the burner should fall).
When handling, keep the load at not more than
20-25 cm from the ground.
CAUTION
After positioning the burner near the installation
point, correctly dispose of all residual packaging,
separating the various types of material.
Before proceeding with the installation operations,
carefully clean all around the area where the burn-
er will be installed.
CAUTION
After removing all the packaging, check the integ-
rity of the contents. In the event of doubt, do not
use the burner; contact the supplier.
The packaging elements (wooden cage or card-
board box, nails, clips, plastic bags, etc.) must not
be abandoned as they are potential sources of
danger and pollution; they should be collected
and disposed of in the appropriate places.
WARNING
The burner output must be within the boiler’s firing
rate.
WARNING
A burner label that has been tampered with, re-
moved or is missing, along with anything else that
prevents the definite identification of the burner
and makes any installation or maintenance work
difficult.
GAS
GAZ
....
II
2R 3R
Fig. 4
D10747
AB
C
DE
G
G
H
F
H

11 20123803
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Installation
5.4 Generator plate
Pierce the closing plate of the combustion chamber, as in Fig. 5. Only for codes 20117147 e 20117203 see Fig. 6:
5.5 Combustion head installation
Unscrew the nut 4) and the washer 5), already installed;
assembly the combustion head 1) to the burner 3) by inter-
posing the gasket 2);
fix the flange 6) with the nuts 4) and the washers 5).
5.6 Securing the burner to the tunnel oven
For the installation proceed as follows:
Fix the burner 1)(Fig. 8) to the boiler door 2) using the 4
screws and (if necessary) the 4 nuts, interposing the insulat-
ing gasket 3).
Fig. 5
9
127
127
20048778
162
127
194
12
Fig. 6
20181119
62
4
3
1
5
Fig. 7
20048777
231
Fig. 8
20048781

20123803 12
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Installation
5.7 Positioning the probe - electrode
Before installing the burner on the boiler, make sure the probe
and electrode are placed correctly as in Fig. 9.
5.8 Fuel supply
The burners are teamed with one-piece pneumatic proportioning
gas valves, via which the amount of gas delivered, and hence the
output produced, can be modulated.
A signal reporting pressure detected in the air circuit is carried to
the pneumatic gas valve, which delivers an amount of gas in pro-
portion to the airflow produced by the fan.
To optimise the bulk, the gas train is assembled directly on the
body of the burner.
5.8.1 Gas train assembly
The connection valve-manifold allows compensating the acci-
dental occlusion of the suction line through the distributed gas re-
duction.
WARNING
Do not turn the electrode: position it as illustrated.
Placing the electrode near the ionisation probe
may result in the control box amplifier being dam-
aged.
B
4-4.5
A
5- 7
Fig. 9
20048786
Explosion danger due to fuel leaks in the pres-
ence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that the fuel interception tap is closed
before performing any operation on the burner.
WARNING
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
DANGER
Disconnect the electrical supply by means of the
system's main switch.
Make sure that there are no gas leaks.
Pay attention when handling the train: danger of
crushing of limbs.
Make sure that the gas train is properly installed
by checking for any fuel leaks.
The operator must use the required equipment
during installation.

13 20123803
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Installation
Air/gas mixer
Gas and combustive air are mixed inside the purging circuit (mix-
er), starting from the intake inlet.
Through the gas train, fuel is introduced into the intake air current
and optimal mixing commences with the aid of a mixer.
5.8.2 Gas valve
Tab. E
GAS TRAIN ASSEMBLY
D7953
D7155 D7380
Air/gas mixer
in the suction line circuit
Gas supply
Gas pressure downline
test point (P1)
Gas pressure downline
test point (P2)
Flange Gas valve
Minimum gas flow
adjustment on the stabiliser (V2)
D7376
Gas compensation pipe
Fig. 10
Maximum gas flow
adjustment (V1)
Valve model Honeywell VK4125V 2011 4
Mixer model Honeywell 45.900.446-253B
Gas line connection 1/2" inlet
Working temperature -15°C/70°C
Max. working pressure 30 mbar
Min. working pressure 15 mbar
Max. inlet pressure 60 mbar
Valve class B + B
Electrical supply 220-240 V
Protection level IP 40 according to IEC 529

20123803 14
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Installation
5.8.3 Testing
Check the standby of the burner by opening the thermostats (TL);
check that the burner is blocked while is working by opening
the connector (CN)inserted in the probe red wire and located out-
side the control box.
5.8.4 Ionisation current
The minimum current necessary for the control box operation is
5 µA. The burner normally supplies a higher current value, so that
no check is needed.
Anyway, if you want to measure the ionisation current, you need
to open the connector (CN1) fitted on the red wire and insert a mi-
croammeter.
Optimum calibration values
MIN. output MAX. output
CO2(%) O2(%) CO2(%) O2(%)
METHANE 8 6.6 9 4.9
LPG 9.5 6.4 10 5.6
Probe
Connector
Control box
D5006
Fig. 11

15 20123803
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Operation
6.1 Notes on safety for the first start-up
6.2 Adjustments prior to ignition
The following to be made are:
open the manual valves located upline from the gas train;
bleed the air from the gas pipes using the screw on the
socket P1 (Fig. 10 on page 13).
6.3 Burner start-up
Close the thermostat and switch on the burner’s power. The burn-
er starts in pre-purging mode at top speed.
Speed subsequently decreases to the START value and the
burner fires. If however the fan starts up but no flame has ap-
peared at the end of the safety period, the burner goes into lock-
out. Reset and wait for a new start-up attempt. If the burner still
does not fire, the problem may be that gas is not reaching the
combustion head within the 3-second safety time.
Turn screw V1 on the gas valve mixer anticlockwise slightly
(Fig. 10 on page 13).
Once the burner has fired, the next step is to complete the burn-
er’s other adjustments.
6.4 Fan adjustment
Modulation is based on variable-speed technology. Combustion
air delivery can be adjusted by varying the motor’s speed (rpm).
The proportioning gas train, depending on the pressure detected
in the purging circuit, delivers the right amount of fuel.
Hence the output delivered is adjusted by varying the motor’s
speed of rotation.
Motor speed can be adjusted by means of the three “Trimmers”
(Fig. 13).
6.5 Gas valve adjustment
The regulation of the gas delivery is achieved using the two
screws V1 and V2 (Fig. 10 on page 13).
To vary the maximum gas delivery turn screw V1:
– to increase the delivery: turn the screw in an anticlockwise di-
rection (unscrew);
– to reduce the delivery: turn the screw in a clockwise direction
(screw up).
To vary the minimum gas delivery act on the screw V2 on the gas
valve.
Remove the protective screws and turn the screw inside with an
allen spanner:
– to increase the delivery: turn the screw in clockwise direction
(screw);
– to reduce the delivery: turn the screw in anticlockwise direc-
tion (unscrew).
Definition of the fan adjustments:
The adjustments are made by adjusting the three potentiometers
on the control box:
START: determines the air in the start phase;
MIN: determines the modulation minimum;
MAX: determines the modulation maximum.
6 Operation
WARNING
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
Refer to paragraph “Safety test - with gas ball
valve closed” on page 21 before the first start-
up.
Fig. 12
D7953
Minimum gas flow adjustment
on the stabiliser (V2)
Maximum gas flow
adjustment (V1)

20123803 16
GB
Operation
6.6 Burner adjustment on tunnel oven
To obtain the optimum adjustment of the burner, it is necessary
to view the flame via the opening on the conduit. Good combus-
tion quality is associated with a light blue flame, firmly attached to
the fabric.
Check and adjust, in this order:
MAX output;
MIN output;
ignition output.
The MAX output must correspond to that required by the system.
To increase or decrease its value, adjust the MAX trimmer locat-
ed on the control box (Fig. 13). Measure the gas delivery on the
counter to precisely establish the burnt output.
Check the flame quality:
– to make it more blue, reduce the quantity of gas by turning
screw V1 clockwise (tighten);
– to make it more firmly attached, increase the quantity of gas
by turning screw V1 anticlockwise (loosen).
The MIN output must correspond to that required by the system.
To increase or decrease its value, adjust the MIN trimmer located
on the control box (Fig. 13).
Measure the gas delivery on the counter to precisely establish the
burnt output.
Check the flame quality:
– to make it more blue, reduce the quantity of gas by turning
screw V2 anticlockwise (loosen);
– to make it more firmly attached, increase the quantity of gas
by turning screw V2 clockwise (tighten).
The colour of the flame must always be light blue, with a slightly
red tinge.
The ignition output can be varied by means of the START trim-
mer located on the control box (Fig. 13). Adjust the output so as
to ensure a good ignition.
WARNING
Avoid the formation of radiant areas.
Maximum output
Minimum output
Starting output
D11289
Fig. 13

17 20123803
GB
Operation
6.7 Adjusting the three-flame head assembly
The head assembly 1)(Fig. 14) has three zones A), B) and C)
with different outputs.
Adjusting these zones is carried out using the screws on the mod-
ulator 2).
To access the adjustment screws, the two covers 3) need to be
removed.
Using the screw A) you can adjust the output of the front
area of the head assembly A).
Screwing in decreases the output and unscrewing increases
it.
Using the screw B) you can adjust the output of the central
area of the head assembly B).
Screwing in decreases the output and unscrewing increases
it.
Using the screw C) you can adjust the output of the rear
area of the head assembly C).
Screwing in decreases the output and unscrewing increases
it.
WARNING
After adjusting, put back the covers 3) taking care
to position the gasket correctly 4).
2
3
4
A
B
C
1
C
B
A
3
4
Fig. 14
20099563

20123803 18
GB
Operation
6.8 Operating programme
6.8.1 Normal operation
Operating times
Time expressed in seconds
ts
t3t2
tw t1 tm
TL
M
I
V
SO
LED
P
M
SO
.
tf
D10632
Red (LED signalling)
No signal needs to be received
Fig. 15
Key
I– Ignition transformer
LED – Reset button LED indicating operating status
M–Fanmotor
SO – Ionisation probe
TL – Limit thermostat
V– Gas valve
Lockout
Flame loss during the operation
and lockout due to ignition failure
ta tf tl tm ts tw t1 t2 t3 t8
20140105 -403 510
ta
Time for checking motor turns:
if the number of turns is lower than 900 rpm, after ta will
be carried out a lockout.
tw Stabilisation time motor turns.
tf Response time after the flame disappearance. t1 Pre-purging time:
by the signal of heat request to the end of the ignition.
tl Flame or flame simulation detected during pre-purging:
immediate lockout. t2 Transformer pre-ignition time: ignition before the valve closing.
tm Stabilisation time:
the modulation occurs after this time. t3 Transformer ignition time: the transformer remains on during the safety time.
ts
Safety time:
if at the end of the time ts a flame is not present, tpp is
carried out. After 3 times follows a lockout.
t8
Post-purging time:
Additional purging when the heat request is completed,
or in case of flame failure during the operation or in
case of ignition failure.