Riello RS 250/EV Quick start guide

20044771 (2) - 07/2012
Installation, use and maintenance instructions
Forced draught gas burner
Progressive two stage or modulating operation
Code Model
20044529 RS 250/EV
GB

1 20044771
GB
Contents
1 Information and general instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Information about the instruction manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.2 General dangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.3 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.4 Danger: live components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Guarantee and responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1 Owner’s responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety and prevention. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Personnel training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Technical description of the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Electrical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Burner models designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Packaging - weight - Approximate measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Burner dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Burner equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.7 Burner description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.8 Firing rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.8.1 Procedure to refer burner operating condition in high altitude plants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.9 Minimum furnace dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.10 Control box for the air/fuel ratio (LMV52...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.11 Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Notes on safety for the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3 Preliminary checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 Operation position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Boiler plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6 Securing the burner to the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7 Electrode positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.8 Combustion head adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.1 Air adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.2 Gas adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.9.1 Gas train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.9.2 Gas feeding line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.9.3 Gas pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.10 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.10.1 Speed sensor adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.10.2 Inverter connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.11 Motor connection at 208-230 or 460V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.12 Motor connection at 575V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.13 Reversible direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5 Start-up, calibration and operation of the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 Notes on safety for the first start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Adjustments before first firing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.3 Burner start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4 Combustion air adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.4.1 Adjusting gas/air delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.4.2 Air/fuel control and power modulation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

20044771 2
GB
Contents
5.5 Final calibration of the pressure switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.5.1 Air pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.5.2 Maximum gas pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.5.3 Minimum gas pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.6 Final checks (with the burner working) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.1 Notes on safety for the maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2 Maintenance programme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2.1 Maintenance frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2.2 Checking and cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2.3 Maintenance of burner electrical components under the control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.3 Opening the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.4 Closing the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A Appendix - Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B Appendix - Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
C Appendix - Burner start up report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Information and general instructions
3 20044771
GB
1.1 Information about the instruction manual
1.1.1 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 sys-
tem. If the manual is lost or damaged, another copy must be
requested from the Technical Assistance Service of the area;
is designed for use by qualified personnel;
offers important indications and instructions relating to the
installation safety, start-up, use and maintenance of the
burner.
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.
1.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
1.1.3 Safety precautions
Good safety practices must be used when working on burner
equipment. The potential energy in the electrical supply, fuel and
related equipment must be handled with extreme care to prevent
equipment failures, injuries and potential death.
1.1.4 Danger: live components
Other symbols
This symbol indicates a list.
Abbreviations used
Ch. Chapter
Fig. Figure
Pag. Page
Sec. Section
Tab. Table
Delivery of the system and the instruction manual
When the system is delivered, it is important that:
The instruction manual is supplied to the user by the system
manufacturer, with the recommendation to keep it in the room
where the heat generator is to be installed.
The instruction manual shows:
– the serial number of the burner;
– the address and telephone number of the nearest Assis-
tance Centre;
The system supplier carefully informs the user about:
– the use of the system,
– any further tests that may be necessary before the system is
started up,
– maintenance and the need to have the system checked at
least once a year by the manufacturer or another specialised
technician.
To ensure a periodic check, the manufacturer recommends
the drawing up of a Maintenance Contract.
1 Information and general instructions
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.
WARNING
If you smell gas, open window, extinguish any open
flames, stay away from electrical switches, evacu-
ate the building and immediately call the gas com-
pany.
If this equipment is not installed, operated, operated
and maintained in accordance with the manufactur-
ers intructions, this product could expose you to
substances in fuel or from fuel combustion which
can cause death or serious illness.
Improper servicing of this equipment may create a
potential hazard to equipment and operators.
Servicing must be done by a fully trained and
qualified personnel.
DANGER
This symbol indicates operations which, if not car-
ried out correctly, lead to electric shocks with lethal
consequences.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the ma-
chine with respect for the environment.
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20044771 4
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Information and general instructions
1.2 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 non authorised 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 power supply system;
use of the burner even following an error and/or an irregularity;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that pre-
vent the regular development of the flame, as structurally
established;
insufficient and inappropriate surveillance and care of those
burner components most subject to wear and tear;
use of non-original components, including spare parts, kits,
accessories and optionals;
force majeure.
the manufacturer furthermore declines any and every re-
sponsibility for the failure to observe the contents of this
manual.
1.2.1 Owner’s responsibility
Please pay attention to the Safety Warnings contained within
this instruction manual. Keep this manual for your records and
provide it to your quali fi ed service agency for use in profession-
ally setting up and maintaining your burner.
Your burner will provide years of ef fi cient operation if it is pro-
fessionally installed and maintained by a qualifi ed service tech-
nician. If at any time the burner does not appear to be operating
properly, immediately contact your qualifi ed service agency for
consultation.
We recommend annual inspection/service of your gas heating
system by a qualifi ed service agency.
Failure to follow these instructions, misuse, or incorrect adjust-
ment of the burner could lead to equipment malfunction and re-
sult in asphyxiation, explosion or fire.
WARNING
Failure to observe the information given in this man-
ual, operating negligence, incorrect installation and
the carrying out of non authorised modifications will
result in the annulment by the manufacturer of the
guarantee that it supplies with the burner.
WARNING
If you smell gas:
Do not touch any electrical items.
Open all windows.
Close all gas supply valves.
Contact your local gas authority immediately.
• Do not store flammable or hazardous materials
in the vicinity of fuel burning appliances.
• Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or death.
• Refer to this manual for instructional or addition-
al information.
• Consult a certified installer, service representa-
tive or the gas supplier for further assistance.
• Burner shall be installed in accordance with
manufacturers requirements as outlined in this
manual, local codes and authorities having ju-
risdiction.

Safety and prevention
5 20044771
GB
2.1 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 burn-
er 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.
In particular:
it can be applied to boilers operating with water, steam,
diathermic 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 deliv-
eries for which the burner has been regulated, the pressurisa-
tion of the combustion chamber, the dimensions of the
combustion chamber and the room temperature must all be
within the values indicated in the instruction manual.
Modification of the burner to alter its performance and destina-
tions is not allowed.
The burner must be used in exemplary technical safety condi-
tions. 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.
2.2 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
working around it.
The user:
Undertakes to entrust the machine exclusively to suitably
trained and qualified personnel.
Must take all the measures necessary to prevent unauthorised
people gaining access to the machine.
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.
Must inform the manufacturer if faults or malfunctioning of the
accident prevention systems are noticed, along with any pre-
sumed danger situation.
Personnel must always use the personal protective equipment
envisaged by legislation and follow the indications given in this
manual.
Personnel must follow all the danger and caution indications
shown on the machine.
Personnel must not carry out, on their own initiative, opera-
tions or interventions that are not within their province.
Personnel are obliged to inform their superiors of every prob-
lem 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 all responsibility for any damage that may
be caused by the use of non-original parts.
2 Safety and prevention

20044771 6
GB
Technical description of the burner
3.1 Technical data
Tab. A
(1) Reference conditions: ambient temperature 68 °F (20 °C) - Barometric pressure 394” WC - Altitude 329 ft.
(2) Pressure at test point 21)(Fig. 3), with zero pressure in the combustion chamber, with open gas ring 2)(Fig. 22) at maximum burner output
(3) Sound pressure measured in manufacturer’s combustion laboratory, with burner operating on test boiler and at maximum rated output.
* Firing rate for C-ETL Canadian Listing
3.2 Electrical data
Fan motor IE1
Tab. B
Fan motor IE2/EPACT
Tab. C
3 Technical description of the burner
Model RS 250/EV
Output (1)
High MBtu/hr
kW
4732 - 10034 (9122*)
1387 - 2941 (2674*)
Low MBtu/hr
kW
1975
579
Fuel
- Max delivery
- Pressure at maximum delivery (2) natural gas
SCFH
“ WC
Natural gas
9808
7.6
Operation Low - high or modulating
Standard application Boilers: water, steam, thermal oil
Ambient temperature °F 32 - 104 (0 - 40 °C)
Combustion air temperature °F max 140 (60 °C)
Noise levels (3) dB(A) 83
Model RS 250/EV
Control circuit power supply V/Ph/Hz 120/1/60
Main power supply (+/-10%) V/Ph/Hz 208-220/3/60 460/3/60 575/3/60
Fan motor rpm
HP
V
A
3480
7.5
208-230
19.4
3480
7.5
460
9.7
3480
7.5
575
8.7
Ignition transformer V1 - V2
I1 - I2
120 V - 1 x 8 kV
1.6 A - 20 mA
Electrical power consumption W6550 6550 7350
Electrical control circuit cons. W max 750
Total electrical consumption W7300 7300 8100
Electrical protection NEMA 1
Model RS 250/EV
Control circuit power supply V/Ph/Hz 120/1/60
Main power supply (+/-10%) V/Ph/Hz 208-220/3/60 460/3/60 575/3/60
Fan motor rpm
HP
V
A
3500
7.5
208-230
18.6
3500
7.5
460
9.3
3500
7.5
575
7.4
Ignition transformer V1 - V2
I1 - I2
120 V - 1 x 8 kV
1.6 A - 20 mA
Electrical power consumption W6300 6300 6250
Electrical control circuit cons. W max 750
Total electrical consumption W7050 7050 7000
Electrical protection NEMA 1

Technical description of the burner
7 20044771
GB
3.3 Burner models designation
3.4 Packaging - weight - Approximate measurements
The packaging of the burner (Fig. 1) rests on a wooden plat-
form that is particularly suitable for lift trucks.
The overall dimensions of the packaging are shown in Tab. D.
The weight of the burner complete with its packaging is shown
in Tab. D.
Tab. D
3.5 Burner dimensions
The dimensions of the burner are shown in Fig. 2.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part drawn back on the sliding
bars.
The dimensions of the open burner are indicated by position I.
Tab. E
3.6 Burner equipment
The burner is supplied complete with:
Gas train flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Flange gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1
Connector for pilot line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1
Screws (M10 x 40) to fix the flange . . . . . . . . . . . . . . . . . . . .No. 4
Screws (M4 x 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .No. 1
Small disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instruction manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Model Code Code RBNA Main Voltage Flame safeguard
RS 250/EV 20044529
tbd 208-220/3/60
Burner mountedtbd 460/3/60
tbd 575/3/60
Inch A B C lbs
RS 250/EV 59 30 29/32 39 3/8286
D36
Fig. 1
Inch A B C D E F G H I L M N O
RS 250/EV 33 55/64 16 25/32 17 3/32 23 21/32 41 17/64 15 15/64 8 3/417 11/64 63 15/32 8 31/32 5 29/32 10 23/64 2
D731 Fig. 2

20044771 8
GB
Technical description of the burner
3.7 Burner description
1 Combustion head
2 Burner pilot
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Burner pilot attachment
6 Gas actuator
7 Ignition electrode
8 “K7” relay
9 Lifting ring
10 Burner terminal board for electrical wiring “X1”
11 Operator panel with LCD display
12 Control box for checking flame and air/fuel ratio
13 Auxiliary fuse
14 “CALL FOR HEAT” signal
15 QRI flame sensor
16 Ignition transformer “TA2”
17 Holes for cable grommets for electrical wiring for accesso-
ries(to be carried out by the installer)
18 Air actuator
19 Air pressure switch
20 Sliding bars for opening the burner and inspecting the com-
bustion head
21 Gas pressure test point and head fixing screw
22 Combustion head air pressure test point
23 Extension sliding bars
24 “OFF - ON” switch
25 Fan air inlet
26 Screws to secure fan to pipe coupling
27 “LOCAL- REMOTE” switch
28 Gas butterfly valve
29 Boiler fixing flange
30 Flame stability disc
31 Horn
32 “ALARM SILENCE” button
33 “POWER ON” signal
34 “IGNITION ON” signal
35 “FUEL ON” signal
36 “ALARM ON” signal
37 Control box transformer “T1”
38 Hight voltage lead
39 Din bar for “K7” relay and available for accessories
40 Optional holes
41 Din bar for fuse holder, step-down transformer and OCI
412.10 (available)
42 Ground terminals
43 Din bar available for accessories
44 Fan motor
45 “K1” relay
46 “K2” relay
47 “K3” relay
48 “K5” relay
49 Gas train flange
50 Air pressure switch test point
51 Variable speed sensor
One type of burner failure may occur:
Flame safeguard lock-out
If the flame safeguard alarm 36)(Fig. 3) lights up, it indicates that
the burner is in lock-out. To reset, press the reset pushbutton.
1
3730
21
5
9
20
19
12
13
41
11
10
942
24
27
32
403334 14 35 40 36 23 42 9
51
25
2
29
22
6
26
42
18
38
50
16
15
49
28
4
44 43
45 46 47 48 31 39
17
17
8
37
A
Seen from A
D12182
Fig. 3