Riello P 300 P/G Quick start guide

20170350 (1) - 11/2019
Installation, use and maintenance instructions
Light oil burners
Progressive two-stage or modulating operation
CODE MODEL TYPE
20169224 P 300 P/G 483 M1
20169232 P 300 P/G 483 M1
20169233 P 300 P/G 483 M1
20169234 P 300 P/G 483 M1
20169235 P 450 P/G 484 M1
20169236 P 450 P/G 484 M1
GB

Translation of the original instructions

1 20170350
GB
Contents
1 Declarations................................................................................................................................................................................ 2
2 Information and general warnings............................................................................................................................................ 3
2.1 Information about the instruction manual ......................................................................................................................................................3
2.2 Guarantee and responsibility ........................................................................................................................................................................4
3 Safety and prevention................................................................................................................................................................ 5
3.1 Introduction ...................................................................................................................................................................................................5
3.2 Personnel training .........................................................................................................................................................................................5
4 Technical description of the burner ......................................................................................................................................... 6
4.1 Burner designation ........................................................................................................................................................................................6
4.2 Models available ...........................................................................................................................................................................................6
5 Technical description of the burner ......................................................................................................................................... 7
5.1 Technical data...............................................................................................................................................................................................7
5.2 Electrical data................................................................................................................................................................................................7
5.3 Overall dimensions........................................................................................................................................................................................8
5.4 Standard equipment......................................................................................................................................................................................8
5.5 Firing rates ....................................................................................................................................................................................................9
5.6 Test boiler ...................................................................................................................................................................................................10
5.7 Burner description .......................................................................................................................................................................................11
5.8 Electrical panel description .........................................................................................................................................................................12
5.9 Control box RFGO-A23...............................................................................................................................................................................13
5.10 Servomotor SQM40 ... ................................................................................................................................................................................14
6 Installation ................................................................................................................................................................................ 15
6.1 Notes on safety for the installation ..............................................................................................................................................................15
6.2 Handling ......................................................................................................................................................................................................15
6.3 Preliminary checks ......................................................................................................................................................................................15
6.4 Operating position .......................................................................................................................................................................................16
6.5 Boiler plate ..................................................................................................................................................................................................16
6.6 Blast tube length .........................................................................................................................................................................................16
6.7 Securing the burner to the boiler.................................................................................................................................................................17
6.8 Nozzle assembly .........................................................................................................................................................................................17
6.9 Electrodes adjustment.................................................................................................................................................................................17
6.10 Nozzle installation .......................................................................................................................................................................................18
6.11 Light oil supply ............................................................................................................................................................................................20
6.12 Pump...........................................................................................................................................................................................................22
6.13 Electrical connections .................................................................................................................................................................................23
6.14 Calibration of the thermal relay ...................................................................................................................................................................24
6.15 Motor rotation ..............................................................................................................................................................................................24
7 Start-up, calibration and operation of the burner ................................................................................................................. 25
7.1 Notes on safety for the first start-up ............................................................................................................................................................25
7.2 Adjustments prior to ignition (light oil) .........................................................................................................................................................25
7.3 Maximum fuel flow rate adjustment.............................................................................................................................................................25
7.4 Pressure variator adjustment ......................................................................................................................................................................26
7.5 Combustion head adjustment .....................................................................................................................................................................27
7.6 Air damper setting .......................................................................................................................................................................................28
7.7 Servomotor adjustment ...............................................................................................................................................................................29
7.8 Pressure switch adjustment ........................................................................................................................................................................29
7.9 Operation sequence of the burner ..............................................................................................................................................................30
7.10 Final checks ................................................................................................................................................................................................30
8 Maintenance.............................................................................................................................................................................. 31
8.1 Notes on safety for the maintenance ..........................................................................................................................................................31
8.2 Maintenance programme ............................................................................................................................................................................31
8.3 Opening the burner .....................................................................................................................................................................................32
8.4 Closing the burner.......................................................................................................................................................................................32
9 LED indicator and special function ........................................................................................................................................ 33
9.1 Description of LED lamps............................................................................................................................................................................33
9.2 Check mode function ..................................................................................................................................................................................33
9.3 Flame control lock-out or emergency stop condition...................................................................................................................................33
9.4 LED lamps: burner operating status............................................................................................................................................................34
10 Problems - Causes - Remedies signalled by LED indicators............................................................................................... 35

20170350 2
GB
Declarations
1 Declarations
Declaration of conformity in accordance with ISO / IEC 17050-1
Manufacturer: RIELLO S.p.A.
Address: Via Pilade Riello, 7
37045 Legnago (VR)
Product: Light oil burners
Model and type: PRESS 300 P/G
PRESS 450 P/G
483 M1
484 M1
These products are in compliance with the following Technical Standards:
EN 267
EN 12100
and according to the European Directives:
MD 2006/42/EC Machine Directive
LVD 2014/35/EU Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
Legnago, 21.04.2018 General Manager
RIELLO S.p.A. - Burners Department
Research and Development Director
RIELLO S.p.A. - Burners Department
Eng. U. Ferretti Eng. F. Comencini

3 20170350
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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
Centre 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
carried out correctly, cause serious injury, death
or long-term health risks.
ATTENTION
This symbol indicates operations which, if not
carried out correctly, may cause serious injury,
death or long-term health risks.
CAUTION
This symbol indicates operations which, if not
carried out correctly, may cause damage to the
machine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not
carried out correctly, lead to electric shocks with
lethal 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
atmosphere may be present. An explosive
atmosphere 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 COVER
AND ALL THE SAFETY AND PROTECTION
DEVICES
This symbol signals the obligation to reassemble
the cover 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.

20170350 4
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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
Assistance 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
recommends the drawing up of a Maintenance Contract.
2.2 Guarantee and responsibility
The manufacturer guarantees its new products from the date of
installation, 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,
incorrectly 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;
continuation of use of the burner when a fault has occurred;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the structurally
established flame;
insufficient and inappropriate surveillance and care of those
burner components most likely to be subject to wear and
tear;
use of non-original components, including spare parts, kits,
accessories and optional;
force majeure.
The manufacturer furthermore declines any and every
responsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
ATTENTION
Failure to observe the information given in this
manual, operating negligence, incorrect
installation and carrying out of non authorised
modifications will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

5 20170350
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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
safety rules 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
confidence 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
dangerous.
Specifically:
it can be applied to boilers operating with water, steam,
diathermic oil, and to other uses 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
chamber and the ambient temperature must all be within the
values indicated in the instruction manual.
Modification of the burner to alter its performance and
destinations is not allowed.
The burner must be used in exemplary technical safety
conditions. 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
responsible for the machine and for the training of the people
working 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, the user undertakes to ensure that everyone
knows the use and safety instructions for his own duties;
Personnel must observe all the danger and caution
indications shown on the machine.
Personnel must not carry out, on their own initiative,
operations 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
compromise 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
ATTENTION
The manufacturer guarantees safety and proper
operation only if all burner components are intact
and correctly positioned.
must take all the measures necessary to
prevent unauthorised people gaining access
to the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident
prevention systems are noticed, along with
any presumed danger situation;
personnel must always use the personal
protective equipment envisaged by legislation
and follow the indications given in this
manual.

20170350 6
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Technical description of the burner
4.1 Burner designation
4.2 Models available
4 Technical description of the burner
Designation Voltage Start-up Code
PRESS 300 P/G TC FS1 3/230-400/50 Direct 20169232
PRESS 300 P/G TL FS1 3/230-400/50 Direct 20169233
PRESS 300 P/G TC FS1 3N/400/50 Star/Triangle 20169224
PRESS 300 P/G TL FS1 3N/400/50 Star/Triangle 20169234
PRESS 450 P/G TC FS1 3N/400/50 Star/Triangle 20169235
PRESS 450 P/G TL FS1 3N/400/50 Star/Triangle 20169236
Series: PRESS
Operation: Three-stage T/G
Size :
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50/60
110/50/60
PRESS 300 P/G TC
Emission: C01 or... Class 1 EN267
C02 or MZ Class 2 EN267
C03 or BLU
Class 3 EN267
3/230-400/50 230/50
BASIC DESIGNATION
EXTENDED DESIGNATION
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
140... 450
Head: TC Standard head
TL Extended head
Flame control system:
FS1
FS2
Standard (1 stop every 24 h)
Continuous operation only with the use of a
flame detection electrode (ionisation)
FS1
Modulating P/G

7 20170350
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Technical description of the burner
5.1 Technical data
Tab. A
(1) Reference conditions: Room temperature 20°C - Barometric pressure 1000 mbar – Altitude 100 m above sea level.
5.2 Electrical data
Tab. B
5 Technical description of the burner
MODEL PRESS 300 P/G PRESS 450 P/G
Output (1) kW 890 - 3560 1190 - 5340
Delivery (1) kg/h 75 - 300 100 - 450
Fuel Light oil
- Net calorific value kWh/kg
Mcal/kg
11.8
10,2 (10.200 kcal/kg)
- Density kg/dm3 0.82 - 0.85
- viscosity at 20 °C mm2/s max 6 (1,5 °E - 6 cSt)
Operation • Intermittent (min. 1 stop every 24 hours).
• Progressive two-stage (modulating by kit).
Nozzle number 1 (nozzle with return line)
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Pump output (at 40 bar)
pressure range
fuel temperature
kg/h
bar
°C max
730
7-40
140
1000
7-30
140
Weight of the burner (complete with packaging) kg 238 300
MODEL PRESS 300 P/G PRESS 300 P/G
CODE 20169232 - 20169233 20169224 - 20169234
Electrical power supply V
Hz
3 ~ 400-230V
50
3N ~ 400V
50
Electrical motor rpm
kW
V
A
2930
9.2
230/400
28.6/16.5
2930
9.2
400/690
16.5/9.6
Ignition transformer Primary: 2.3A - Secondary: 2x6.5 kV - 35 mA
Absorbed electrical power kW max 10.9 10.9
Protection level IP 40
MODEL PRESS 450 P/G
CODE 20169235-20169236
Electrical power supply V
Hz
3N ~ 400V
50
Electrical motor rpm
kW
V
A
2915
15
400/690
26.8-15.5
Ignition transformer Primary: 2.3A - Secondary: 2x6.5 kV - 35 mA
Absorbed electrical power kW max 17.1
Protection level IP IP 40

20170350 8
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Technical description of the burner
5.3 Overall dimensions
The dimensions of the burner are given in (Fig. 1).
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part drawn back on the slide
bars.
Tab. C
5.4 Standard equipment
mm P T I D E L H G M
PRESS 300 P/G TC 1000 444 400 295 496 915 680 502 413
PRESS 300 P/G TL 1000 574 530 295 496 915 680 502 413
PRESS 450 P/G TC 1070 476 420 336 525 961 714 522 439
PRESS 450 P/G TL 1070 606 550 336 525 961 714 522 439
E
P T L
G
H
M
D
I
Fig. 1
20172678
Flexible hoses .......................................................................... No. 2
Nipples for flexible hoses ......................................................... No. 2
Screws...................................................................................... No. 4
Thermal flange gasket.............................................................. No. 1
Cable grommet (PRESS 300 P/G) ........................................... No. 4
Cable grommet (PRESS 450 P/G) ........................................... No. 8
Starter (PRESS 450 P/G)......................................................... No. 1
Extensions (only for TL versions) ............................................. No. 2
Installer booklet ........................................................................ No. 1
Spare parts list ......................................................................... No. 1

9 20170350
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Technical description of the burner
5.5 Firing rates
During operation, burner output varies between:
MINIMUM FLOW RATE: can drop down to 75 kg/h
MAXIMUM OUTPUT: must be within the firing rate (Fig. 2
and Fig. 3).
ATTENTION
The FIRING RATE was obtained with an ambient
temperature of 20°C and a barometric pressure of
1000 mbar (approx. 100m above sea level), with
the combustion head adjusted as shown on page
20.
mbar
Fig. 2
kg/h
D2701
Burner output
kW
PRESS 300 P/G
Fig. 3
kg/h
kW
D2783
mbar
PRESS 450 P/G
Burner output

20170350 10
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Technical description of the burner
5.6 Test boiler
The burner/boiler combination does not pose any problems if the
boiler is EC approved and its combustion chamber dimensions
are similar to those indicated in the diagram (Fig. 4).
If the burner must be combined with a boiler that has not been EC
approved and/or its combustion chamber dimensions are clearly
smaller than those indicated in the diagram, consult the
manufacturer.
The firing rates were obtained in special test boilers, according to
EN 267 standard.
In Fig. 4 you can see the diameter and length of the test
combustion chamber.
Example:
Output 650 Mcal/h (407 kW): diameter 60 cm - length 2 m.
MODULATING RATIO
The modulating ratio, obtained in test boilers according to
standard (EN 267 for light oil) is 4:1 for light oil.
Fig. 4
Combustion chamber
m
D497

11 20170350
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Technical description of the burner
5.7 Burner description
1 Suction connection
2 Pump pressure regulator
3 Return connection
4 Gauge connection (G 1/4)
5 Vacuometer connection (G 1/4)
6 Delivery pressure gauge
7 Return pressure gauge
8 Control box reset button with lockout signal
9 Pressure switch
10 Head drive rod
11 Air adjustment cam
12 Servomotor
13 Modulator (only for modulating units)
14 Pressure adjustment eccentric on return line
15 Fan motor
11 12
12354
13 14 15 976
10
8
Fig. 5
20172024

20170350 12
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Technical description of the burner
5.8 Electrical panel description
1 Fan motor thermal relay and contactor (for direct starter
version only)
2 Ignition transformer
3 Filter to protect against radio disturbance
4 Servomotor connector
5 Control box base
6 Cable grommets for external connections (to be carried out
by the installer)
7 Terminal board for electric connection
8 Oil valve coils
9 Flame sensor
9
5
7
6
1
23
8
4
Fig. 6
20172025

13 20170350
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Technical description of the burner
5.9 Control box RFGO-A23
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the control box connection
area, fully disconnect the system from the power supply
(omnipolar separation).
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
Before any intervention (assembly and installation
operations, assistance, etc.), ensure the wiring is in order
and that the parameters are correctly set, then make the
safety checks.
Falls and collisions can negatively affect the safety
functions. In this case, the control box must not be operated,
even if it displays no evident damage.
For safety and reliability, comply with the following
instructions:
– avoid conditions that can favour the development of
condensate and humidity. Otherwise, before switching on
again, make sure that the entire control box is perfectly dry!
– Static charges must be avoided since they can damage the
control box’s electronic components when touched.
Use
The control box is a control and supervision system of medium
and large capacity forced draught burners.
If used with the flame detection electrode the system can operate
continuously whereas, with the use of UV sensors it operates
intermittently with stop and restart request at least once every
24h.
Installation notes
• Make sure that the electrical wiring inside the boiler complies
with national and local safety regulations.
• Do not confuse the powered conductors with the neutral
ones.
• Ensure that spliced wires cannot get into contact with
neighbouring terminals. Use adequate ferrules.
• Arrange the H.V. ignition cables separately, as far as
possible from the control box and the other cables.
• When wiring the unit, make sure that AC 230 V mains voltage
cables are run strictly separate from extra low-voltage cables
to avoid risks of electrical shock hazard.
Technical data
Tab. D
Electrical wiring of the flame detector
It is important for signal transmission to be almost totally free of
any disturbances or loss:
• Always separate the detector cables from the other cables:
– The capacitive reactance of the line reduces the size of the
flame signal.
– Use a separate cable.
• Respect the allowed cable lengths.
• The ionisation probe is not protected against the risk of
electrocution. When connected to the electricity supply, the
ionisation probe must be protected against any accidental
contact.
• Position the ignition electrode and the ionisation probe so
that the ignition spark cannot form an arc on the probe (risk
of electric overcharge).
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. The
Manufacturer cannot assume any responsibility
for damage resulting from unauthorised work!
Mains voltage AC 230 V -15 % / +10 %
Mains frequency 50 / 60 Hz
Primary fuse (external) Refer to the electric
system
Weight approx. 1.1 kg
Power absorption approx. AC 7 VA
Protection level IP40
Safety class II
Environmental conditions
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
Class 1K2
Class 1M2
-50...+85°C
< 90% RH (non-condensing)
Fig. 7
20152163

20170350 14
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Technical description of the burner
5.10 Servomotor SQM40 ...
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Falls and collisions can negatively affect the safety
functions. In this case, the servomotor must not be operated,
even if it displays no evident damage.
Fully disconnect the burner from the mains when working
near terminals and servomotor connections.
Condensation and exposure to water are not allowed.
For safety reasons, the servomotor must be checked after
long periods of non-use.
•
Technical data
Tab. E
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the
servomotor.
Mains voltage 230 V -15% +10%
Mains frequency 50 / 60 Hz
Power absorption 10 VA
Motor Synchronous
Drive angle Varying between 0° and 135°
Protection level Max. IP 66, with appropriate cable
entry
Cable entry 2 x M20
Cable connection terminal board for 0.5mm2(min.)
and 2.5mm2(max.)
Rotation direction Anticlockwise
Rated torque (max.) 10 Nm
Holding torque 5 Nm
Operation time 30 s. at 90°
Weight approx. 2 kg
Environmental conditions:
Operation
Transport and storage
-20....+60° C
-20...+60°C
Fig. 8
S8907

15 20170350
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Installation
6.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner is to
be installed, and arranging for the environment to be illuminated
correctly, proceed with the installation operations.
6.2 Handling
The burner packaging includes a wooden platform, it is therefore
possible to handle the burner (still packaged) with a pallet truck
or fork lift truck.
6.3 Preliminary checks
Checking the consignment
Check the identification label of the burner, showing:
the model (see Ain Fig. 9) and the type of burner (B);
the year of manufacture, in cryptographic form (C);
the serial number (D);
the absorbed electrical power (E);
the types of fuel used and the relative supply pressures (F);
the minimum and maximum possible output data of the
burner (G) (see Firing rate).
6 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
ATTENTION
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and
regulations of the laws in force.
DANGER
The combustion air inside the boiler must be free
from hazardous mixes (e.g.: chloride, fluoride,
halogen); if present, it is highly recommended to
carry out cleaning and maintenance more
frequently.
ATTENTION
Burner handling operations can be highly
dangerous if not carried out with the greatest
attention: distance unauthorised personnel, check
integrity and suitability of the means available.
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
quickly move if the burner should fall).
During handling, keep the load at no more than
20-25 cm from the ground.
After positioning the burner near the installation
point, correctly dispose of all residual packaging,
separating the various types of material.
CAUTION
Before proceeding with the installation operations,
carefully clean all around the area where the
burner will be installed.
CAUTION
After removing all the packaging, check the
integrity of the contents. In the event of doubt, do
not use the burner; contact the supplier.
The packaging elements (wooden cage or
cardboard 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.
ATTENTION
A burner label that has been tampered with,
removed or is missing, along with anything else
that prevents the definite identification of the
burner makes any installation or maintenance
work difficult.
Fig. 9
D2582
A - B CDE
F
G

20170350 16
GB
Installation
6.4 Operating position
6.5 Boiler plate
Pierce the closing plate of the combustion chamber, as in
(Fig. 11). The position of the threaded holes can be marked using
the thermal insulation screen supplied with the burner.
For the combustion head protrusion follow the indications
provided by the boiler manufacturer.
Tab. F
NOTE:
For boilers with front smoke box provide a suitable
protection made of refractory material on the part of the
head protruding in the combustion chamber.
6.6 Blast tube length
The length of the blast tube must be selected according to the
indications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door
complete with its fettling.
Tab. G
ATTENTION
The burner is designed to work only in
positions 1 and 4 (Fig. 10).
Installation 1is preferable, as it is the only
one that allows the maintenance operations
as described in this manual.
The installation 4 permits the operation but
makes the maintenance and inspection
operations of the combustion head more
difficult.
DANGER
Any other position could compromise the
correct operation of the appliance.
The installation 5is prohibited for safety
reasons.
Fig. 10
2 3 4 51
20172679
MODEL L O N
PRESS 300 P/G 260 300 M18
PRESS 450 P/G 310 340 M20
L
O L
N
Fig. 11
20172683
MODEL MIN MAX
PRESS 300 P/G TC 250 400
PRESS 300 P/G TL 380 530
PRESS 450 P/G TC 270 420
PRESS 450 P/G TL 400 550
20172681
MIN
MAX
Fig. 12

17 20170350
GB
Installation
6.7 Securing the burner to the boiler
To separate the burner from the cast iron blast tube, proceed as
follows:
Remove the cover 1), the split pin and pin 2), the nuts 3) and
the screws 4).
Pull out the blast tube from the burner by approx. 100÷120
mm and release the driving fork of the head 6) by removing
the split pins 5).
At this point, it is possible to fully pull out the blast tube from
the pins 7).
Fix the blast tube to the boiler by inserting the insulating seal
8) in-between.
After fitting the selected nozzle, fit the burner on the pins 7)
leaving it open by approx. 100 ÷ 120 mm.
Refit the fork 6) fixing it with the split pins 5).
Completely close the burner fastening it with screws 4), fit
the nuts 3), the pin and split pin 2).
6.8 Nozzle assembly
At this installation stage the burner is still separated from the blast
tube; therefore it is possible to fit the nozzle with a 24mm wrench
3)(Fig. 14) after removing the screws 1) and the turbulator 2). Do
not use any sealing products such as: gaskets, tape or sealants.
Be careful to avoid damaging the nozzle sealing seat.
6.9 Electrodes adjustment
Provide an adequate lifting system.
Be careful as some drops of fuel may leak out
during this phase.
ATTENTION
The seal between burner and boiler must be
airtight.
100÷120mm
1
2
3
4
7
68
5
Fig. 13
D2590
ATTENTION
Do not use any sealing products such as:
gaskets, tape or sealants.
Be careful to avoid damaging the nozzle
sealing seat.
The nozzle must be screwed into place tightly
but not to the maximum torque value
provided by the wrench.
Fig. 14
20119193
ATTENTION
Check that the electrodes are positioned
correctly, as in Fig. 15, complying with the
dimensions indicated.
5 ± 0.2 mm
5 ± 0.2 mm
Fig. 15
D8677

20170350 18
GB
Installation
6.10 Nozzle installation
The burner complies with the emission requirements of the EN
267 standard. In order to guarantee that emissions do not vary,
recommended and/or alternative nozzles specified by Riello in
the Instruction and warning booklet should be used.
6.10.1 Nozzle selection
If you want a delivery somewhere between the two values shown
in the diagram (Fig. 16), select a nozzle with a higher flow rate.
The reduction in the flow rate is obtained with the pressure
variator.
AVAILABLE NOZZLES
Tab. H
NOZZLES RECOMMENDED:
– Fluidics, type N1 (without interception rod)
– Fluidics, type W2 (with interception rod)
– Bergonzo, type B3 or B5 (with interception rod)
NOTE:
It is possible to fit also nozzles without interception rod
(Fluidics N1): in this case there will be no anti-dripping
feature on the spray holder.
ATTENTION
It is advisable to replace the nozzle once a year
during periodical maintenance.
CAUTION
The use of nozzles other than those specified by
Riello S.p.A. and inadequate regular maintenance
may result into emission limits non-conforming to
the values set forth by the regulations in force, and
in extremely serious cases, into potential hazards
to people and objects.
The manufacturing Company shall not be liable
for any such damage arising from non-
observance of the requirements contained in this
manual.
Bergonzo Fluidics
kg/h kg/h
PRESS 300 P/G
70 70
80 80
90 90
100 100
125 115
150 130
175 145
200 160
225 180
250 200
275 225
300 250
325 275
-300
-330
PRESS 450 P/G
70 70
80 80
90 90
100 100
125 115
150 130
175 145
200 160
225 180
250 200
275 225
300 250
325 275
350 300
375 330
400 360
425 400
450 450