Riello RS 70 Quick start guide

Installation, use and maintenance instructions
Instrucciones de instalación, uso y mantenimiento
2916461 (9) - 11/2014
Forced draught gas burners
Quemadores de gas con aire soplado
CODE - CÓDIGO MODEL - MODELO TYPE - TIPO
3789600 - 3789610 RS 70/M 828T1
3789601 - 3789611 RS 70/M 828T1
3787082 RS 70/M 828T80
3787083 RS 70/M 828T80
3789700 - 3789710 RS 100/M 829T1
3789701 - 3789711 RS 100/M 829T1
3787282 RS 100/M 829T80
3787283 RS 100/M 829T80
3789800 - 3789810 RS 130/M 830T1
3789801 - 3789811 RS 130/M 830T1
3787482 RS 130/M 830T80
3787483 RS 130/M 830T80
GB
E
Progressive two-stage or modulating operation
Funcionamiento a dos llamas progresivo o modulante

16461 GB
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: Forced draught gas burners
Model: RS 70/M
RS 100/M
RS 130/M
These products are in compliance with the following Technical Standards:
EN 676
EN 12100
and according to the European Directives:
GAD 2009/142/EC Gas Devices Directive
MD 2006/42/EC Machine Directive
LVD 2006/95/EC Low Voltage Directive
EMC 2004/108/EC Electromagnetic Compatibility
Such products are marked as follows:
The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001.
Legnago, 03.09.2014 Executive General Manager
RIELLO S.p.A. - Burner Department
Research & Development Director
RIELLO S.p.A. - Burner Department
Mr. U. Ferretti Mr. R. Cattaneo
CE-0085AQ0708 Classe 1 (EN 676)

2
6461 GB
Contents
Section Page
1Information and general warnings 3
1.1 Information about the instruction manual 3
1.2 Guarantee and responsibility 3
2Safety and prevention 4
2.1 Introduction 4
2.2 Personnel training 4
3Technical description of the burner 5
3.1 Burner designation 5
3.2 Models available 5
3.3 Burner categories - Countries of destination 5
3.4 Technical data 6
3.5 Electrical data 6
3.6 Burner weight 6
3.7 Overall dimensions 7
3.8 Firing rates 8
3.9 Burner components 9
3.10 Burner equipment 9
3.11 Control box for the air/fuel ratio 10
3.12 Servomotor 10
4Installation 11
4.1 Notes on safety for the installation 11
4.2 Handling 11
4.3 Preliminary checks 11
4.4 Operating position 12
4.5 Securing the burner to the boiler 12
4.6 Combustion head adjustment 14
4.7 Assembly of the gas train 15
4.8 Gas feeding line 16
4.9 Electrical wiring 17
4.10 Calibration of the thermal relay 18
5Start-up, calibration and operation of the
burner 19
5.1 Notes on safety for the first start-up 19
5.2 Operations before start-up 19
5.3 Burner start-up 20
5.4 Burner ignition 20
5.5 Burner adjustment 20
5.6 Operation sequence of the burner 23
5.7 Burner flame goes out during operation 23
5.8 Stopping of the burner 23
5.9 Measuring the ionisation current 24
5.10 Checking the air and gas pressure on the com-
bustion head
24
5.11 Final checks (with burner operating) 24
6Faults - Probable causes - Solutions 25
6.1 Normal operation / flame detection time 26
7Maintenance 27
7.1 Notes on safety for the maintenance 27
7.2 Maintenance programme 27
7.3 Opening the burner 28
7.4 Closing the burner 28
AAppendix - Electrical panel layout 29
BAppendix - Accessories (on request) 35
CAppendix - Gas supply pressure 37
DAppendix - Firing rate on basis of air density 38

36461 GB
Information and general warnings
1
1.1 Information about the instruction manual
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 burn-
er 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
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.
The dangers can be of 3 levels, as indicated below.
Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page 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 consigned to the user by the sys-
tem 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 necessary before the sys-
tem is started up,
- maintenance and the need to have the system checked
at least once a year by the Manufacturer or another spe-
cialised technician.
To ensure a periodic check, recommends the
drawing up of a Maintenance Contract. 
Maximum danger level!
This symbol indicates operations which, if
not carried out correctly, cause serious
injury, death or long-term health risks.
This symbol indicates operations which, if
not carried out correctly, may cause serious
injury, death or long-term health risks.
This symbol indicates operations which, if not
carried out correctly, may cause damage to
the machine and/or injury to people.
GENERAL DANGERS
DANGER
WARNING
CAUTION
This symbol indicates operations which, if
not carried out correctly, lead to electric
shocks with lethal consequences.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of
the machine with respect for the environ-
ment.
This symbol indicates a list.
DANGER: LIVE COMPONENTS
DANGER
1.2 Guarantee and responsibility
guarantees its new products from the installation date, in
accordance with the regulations in force and/or the sales con-
tract. At the moment of the first start-up, check that the burner is
integral and complete.
Failure to observe the information given in this man-
ual, operating negligence, incorrect installation and
carrying out of non authorised modifications will
result in the annulment by of the guarantee
that it supplies with the burner.
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 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;
use of non-original components, including spare
parts, kits, accessories and optionals;
force majeure.
furthermore declines any and every responsibility
for the failure to observe the contents of this manual.
WARNING

4
6461 GB
Safety and prevention
2
2.1 Introduction
The burners have been designed and built in compli-
ance with current regulations and directives, applying the
known technical rules of safety and envisaging all the poten-
tial 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 damag-
ing 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 there-
fore 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
deliveries for which the burner has been regulated, the pres-
surisation 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
destinations is not allowed.
The burner must be used in exemplary technical safety
conditions. Any disturbances that could compromise safe-
ty 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
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;
must take all the measures necessary to prevent unauthor-
ised 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 presumed danger situation.
Personnel must always use the personal protective equip-
ment envisaged by legislation and follow the indications
given in this manual.
Personnel must follow all the danger and caution indica-
tions shown on the machine.
Personnel must not carry out, on their own initiative, oper-
ations 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.

56461 GB
Technical description of the burner
3
3.1 Burner designation
3.2 Models available
3.3 Burner categories - Countries of destination
Designation Voltage Diagnostic Voltage Diagnostic
RS 70/M TC 3 ~ 400 / 230V - 50Hz 3789600 - 3789610 3 ~ 380 / 220V - 60Hz 3787082
RS 70/M TL 3 ~ 400 / 230V - 50Hz 3789601 - 3789611 3 ~ 380 / 220V - 60Hz 3787083
RS 100/M TC 3 ~ 400 / 230V - 50Hz 3789700 - 3789710 3 ~ 380 / 220V - 60Hz 3787282
RS 100/M TL 3 ~ 400 / 230V - 50Hz 3789701 - 3789711 3 ~ 380 / 220V - 60Hz 3787283
RS 130/M TC 3 ~ 400 / 230V - 50Hz 3789800 - 3789810 3 ~ 380 / 220V - 60Hz 3787482
RS 130/M TL 3 ~ 400 / 230V - 50Hz 3789801 - 3789811 3 ~ 380 / 220V - 60Hz 3787483
Country of destination Gas category
BE I2E(R) - I3
CY - CZ - MT I3B/P
LU - PL II2E3B/P
DE II2ELL3B/P
FR II2Er3P
IT II2H3
ES - GB - IE - PT II2H3
AT - CH - CZ - DK - EE - FI - GR - HU - IE
IS - LT - NO - SE - SI - SK - TR II2H3B/P
NL II2L3B/P
Range : R
Size
Fuel : Natural gas
Light oil
Light oil / Methane
Adjustment :
Flame control system :
FS1
FS2
Standard (1 stop every 24h)
Continuous operation (1 stop every 72h)
Electrical supply of the system :
3/400/50
3/230/50
Voltage of auxiliaries :
230/50/60
110/50/60
R S 100 MTC
Emission : C01 or... Class 1 EN676
BLU or BLU Class 3 EN676
FS1 3/400/50 230/50/60
BASIC DESIGNATION
EXTENDED DESIGNATION
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
Heavy oil
E Electronic cam
EV Electronic cam with variable speed (with Inverter)
P Proportional air/gas valve
BP Two stage (light oil) / Proportional valve (gas)
M Mechanical cam
S
L
LS
N
Head : TC Standard head
TL Long head
C02 or MZ Class 2 EN676

6
6461 GB
Technical description of the burner
3
3.4 Technical data
(1) Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0m above sea level.
(2) Pressure upstream of the gas ramp 1)(Fig. 19) as declared by norm EN676, with 0 mbar in the combustion chamber and with the burner at full power.
(3) Sound pressure measured in manufacturer's combustion laboratory, with burner operating on test boiler and at maximum output.
3.5 Electrical data
Motor IE1
Motor IE2
3.6 Burner weight
Model RS 70/M RS 100/M RS 130/M RS 70/M RS 100/M RS 130/M
Type 828T1 829T1 830T1 828T80 829T80 830T80
Output (1)
maximum kW
Mcal/h
470 - 930
404 - 800
700 - 1340
602 - 1152
920 - 1600
791 - 1376
470 - 930
404 - 800
700 - 1340
602 - 1152
920 - 1600
791 - 1376
minimum kW
Mcal/h
150
129
150
129
254
218
150
129
150
129
254
218
Fuel Natural gas: G20 - G23 - G25
Gas pressure at max. output (2) -
Gas: G20/G25 mbar 15.7/22.9 15.5/21.9 12.7/18.9 15.7/22.9 15.5/21.9 12.7/18.9
Operation Intermittent (min. 1 stop in 24 hours)
Standard applications Boilers: water. steam. diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Noise level (3) dBA 75 77 78.5 75 77 78.5
Type 828T1 829T1 830T1 828T80 829T80 830T80
Electrical supply 3 ~ 400V / 230 V 1N ~ 230V +/-10% 50 Hz
(See Chap. 3.2)
3 ~ 380V / 220 V 1N ~ 220V +/-10% 60 Hz
(See Chap. 3.2)
Fan motor (rating)
Operating current
Acceleration current
rpm
V
kW
A
A
2800
220/240 -
380/415
1,1
4,7 - 2,7
33 - 19
2830
220/240 -
380/415
1,5
6,4 - 3,7
48 - 28
2860
220/240 -
380/415
2,2
8,5 - 4,9
68 - 39
3400
208/230 -
380/460
1,1
4,7 - 2,7
28 - 16
3500
208/230 -
380/460
2,2
7,8 - 3,9
43 - 25
3500
208/230 -
380/460
2,2
7,8 - 3,9
64 - 37
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Absorbed electrical power kW max 1,4 1,8 2,6 1,4 1,8 2,6
Protection level IP 44
Type 828T1 829T1 830T1 828T80 829T80 830T80
Electrical supply 3 ~ 400V / 230 V 1N ~ 230V +/-10% 50 Hz
(See Chap. 3.2)
3 ~ 380V / 220 V 1N ~ 220V +/-10% 60 Hz
(See Chap. 3.2)
Fan motor (rating)
Operating current
Acceleration current
rpm
V
kW
A
A
2860
230 / 400
1,1
4,1 - 2,4
2860
230 / 400
1,5
5,5 - 3,4
2860
230 / 400
2,2
7,9 - 4,6
3475
220 / 380
1,1
4,6 - 2,7
28 - 18
3500
220 / 380
2,2
8,1 - 4,7
69 - 40
3500
220 / 380
2,2
8,1 - 4,7
69 - 40
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Absorbed electrical power kW max 1,4 1,8 2,6 1,4 1,8 2,6
Protection level IP 44
The weight of the burner complete with its packaging is shown in table.
Model kg
RS 70/M 70
RS 100/M 73
RS 130/M 76
Fig. 1
D9078

76461 GB
Technical description of the burner
3
3.7 Overall 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
guides.
The dimensions of the open burner are indicated by position I.
D731
(1) Blast tube: short-long
mm ABCDE F (1) GH I (1) LMNO
RS 70/M 511 296 215 555 840 250-385 179 430 1161-1296 214 134 221 2”
RS 100/M 527 312 215 555 840 250-385 179 430 1161-1296 214 134 221 2”
RS 130/M 553 338 215 555 840 280-415 189 430 1161-1296 214 134 221 2”
Fig. 2

8
6461 GB
Technical description of the burner
3
3.8 Firing rates
The firing rates were obtained in special
test boilers, according to EN 676 regula-
tions.
Fig. 4 indicates the diameter and length
of the test combustion chamber.
Example
Output 756 kW (650 Mcal/h):
diameter 60 cm,
length 2m.
The coupling is ensured when the boiler is
EC type-approved; for boilers or ovens
with combustion chambers of very differ-
ent dimensions compared to those shown
in the diagram of Fig. 4, preliminary
checks are recommended.
Fig. 4
Length of combustion
chamber - m
D715
RS 100/M
Fig. 3
RS 70/M
RS 130/M
The maximum output is chosen within area Aof the dia-
gram.
The minimum output must not be lower than the minimum
limit of the diagram.
Warning
The firing rate was obtained considering an ambient temper-
ature of 20°C and an atmospheric pressure of 1013 mbar
(approx. 0 m above sea level), with the combustion head ad-
justed as shown in Ch. 4.6.
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar

96461 GB
Technical description of the burner
3
3.9 Burner components
19
21
17
A
1
2
3
161514
9
26
10
13 11 20
24
18
25
12
23
4
22
58
67
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Servomotor controlling the gas butter-
fly valve and the air damper valve (by
means of an adjustable profile cam
mechanism).
When the burner is not operating the
air gate valve is fully closed in order to
reduce heat dispersion from the boiler
due to the flue draught which draws air
from the fan suction inlet.
6 Plug-socket on ionisation probe cable
7 Extensions for slide bars 15)
8 Motor contact maker and thermal relay
with reset button
9 Power switch for:
automatic - manual - off
Button for:
power increase - power reduction
10 Terminal board for electrical wiring
11 Cable grommets for electrical wiring
(to be carried out by the installer)
12 Control box with lockout pilot light and
lockout reset button
13 Flame inspection window
14 Air pressure switch
(differential operating type)
15 Slide bars for opening the burner and
inspecting the combustion head
16 Gas pressure test point and head fixing
screw
17 Air pressure socket
18 Flame sensor probe
19 Air damper
20 Fan air inlet
21 Screws to secure fan to pipe cou-
pling
22 Gas input pipe
23 Gas butterfly valve
24 Boiler fixing flange
25 Flame stability disc
26 Bracket for application of output power
regulator RWF40
Fig. 5
D8687
A
Seen from A

10 6461 GB
3.10 Burner equipment
3.11 Control box for the air/fuel ratio
Introduction
The RMG/M 88.62... control box included in burners of RS range
is designed to control and start up forced draught gas burners
with intermittent operation.
In compliance with:
- Technical Standard EN676 (gas burners)
- Technical Standard EN298 (gas appliances)
Technical Data
3.12 Servomotor
The servomotor provides simultaneous adjustment for the air
damper, by means of the adjustable profile cam and the gas but-
terfly valve. The servomotor rotates by 130° in 42 seconds.
Do not alter the factory setting for the 5 cams;
simply check that they are set as indicated
below:
Cam I: 130°
Limits rotation toward maximum position.
When the burner is at MAX output, the gas butterfly valve
must be fully open: 90°.
Cam II: 0°
Limits rotation toward minimum position.
When the burner is shut down, the air damper and gas butter-
fly valve must be closed: 0°.
Cam III: 30°
Adjusts the ignition position and the MIN output.
Cam V: integrated to cam III.
The burner is supplied complete with:
Gas train flange
Flange gasket
4 screws to fix the M8x25 flange
Thermal insulation screen
Extensions 7) per guides 15): only TL versions
4 screws to fix the M12x35 burner flange to the boiler
Instruction manual
Spare parts list
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
To avoid damaging things or injuring people, do not
open or alter the control box.
The installation of the burner must be carried out
by qualified personnel, in compliance with the
standards and regulations of the laws in force.
Electrical supply AC 220.....240V
+10% / -15%
Frequency 50.....60 Hz +/- 6%
Internal fuse T6,3H250V
Operation below the nominal value of electrical supply
Minimum operation value
on reduction of electrical supply
below nominal value
approx. AC 160 V
Minimum operation value
on increase in electrical supply
towards nominal value
approx. AC 175 V
Maximum load of the contacts:
Alarm exit
Nominal power supply
Maximum current
AC 230V, 50/60 Hz
0.5 A
Fig. 6
DANGER
WARNING
Allowed cable length
Thermostat
Air pressure switch
CPI
Gas pressure switch
Flame detector
Remote reset
max. 20 m at 100 pF/m
max. 1 m at 100 pF/m
max. 1 m at 100 pF/m
max. 20 m at 100 pF/m
max. 1 m
max. 20 m at 100 pF/m
M4 screws tightening torque max. 0.8 Nm
WARNING
D3859
Fig. 7

11 6461 GB
Installation
4
4.1 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 environment,
proceed with the installation operations.
4.2 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.
4.3 Preliminary checks
Checking the consignment
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.
Checking the characteristics of the burner
Check the identification label of the burner, showing:
the model (see Ain Fig. 8) and type of burner (B);
the year of manufacture, in cryptographic form (C);
the serial number (D);
the data for electrical supply and the protection level (E);
the electrical input power (F);
the types of gas used and the relative supply pres-
sures (G);
the data of the burner's minimum and maximum output
possibilities (H) (see Firing rate)
Warning. The burner output must be within the boiler's
firing rate;
the category of the device/countries of destination (I).
All the installation, maintenance and disassem-
bly operations must be carried out with the elec-
tricity supply disconnected.
DANGER
The installation of the burner must be carried out
by qualified personnel, as indicated in this man-
ual and in compliance with the standards and
regulations of the laws in force.
WARNING
WARNING
The handling operations for the burner can be highly dangerous if not carried out with the greatest 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 quickly move if the burner should fall).
During the handling, keep the load at not 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.
Before proceeding with the installation operations, carefully clean all around the area where the burner will be installed.
CAUTION
CAUTION
R. B. L.
GAS- KAASU
GAZ- AEPIO
0085
RIELLO S. p. A.
I-37045 Legnago (VR)
CE
Fig. 8
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 diffi-
cult.
WARNING
D7738
ABC
EDF
HG
GH
I

12
6461 GB
Installation
4.4 Operating position
The burner is designed to operate only in the positions
1, 2, 3 and 4.
Installation 1is preferable, as it is the only one that al-
lows the maintenance operations as described in this
manual. Installations 2, 3 and 4 permit operation but
make maintenance and inspection of the combustion
head more difficult.
Any other position could compromise the correct opera-
tion of the appliance. Installation 5is prohibited for
safety reasons.
4.5 Securing the burner to the boiler
2 3 4 51
D7739 Fig. 9
Preparing the boiler
100m
m
1 2 5
11
14
13
12
9
3
8
7
6
15
15
10
3
4
Boring the boiler plate
Make holes in the plate shutting off the combustion chamber, as illustrated in Fig. 10.
The position of the threaded holes can be marked using the thermal insulation
screen supplied with the burner.
mm ABC
RS 70/M 185 275 - 325 M 12
RS 100/M 185 275 - 325 M 12
RS 130/M 185 275 - 325 M 12
Fig. 10 D455
Length of the blast tube
The length of the blast tube must be selected according to the indications pro-
vided by the manufacturer of the boiler, and in any case it must be greater
than the thickness of the boiler door complete with its refractory.
The available lengths L are those indicated in the table below.
For boilers with front flue passes 15) or flame
inversion chamber, a protection in refractory mate-
rial 13) must be inserted between the boiler fet-
tling 14) and the blast tube 12).
This protection must not compromise the extrac-
tion of the blast tube. See Fig. 11.
For boilers with a water-cooled frontal, a refractory
lining 13)-14) is not necessary unless expressly
requested by the boiler manufacturer.
Blast tube short long
RS 70/M 250 mm 385 mm
RS 100/M 250 mm 385 mm
RS 130/M 280 mm 415 mm
Fig. 11
D8688
4

13 6461 GB
Installation
Securing the burner to the boiler
Before fixing the burner to the boiler, check from the open-
ing of the blast tube that the probe and the electrode are
correctly positioned, as in Fig. 12.
If, in the previous check, the position of the probe or elec-
trode was not correct, remove the screw 1)(Fig. 13),
extract the inner part 2)(Fig. 13) of the head, and adjust
them.
Do not rotate the probe: leave it as in Fig. 12 since if it is
located too close to the ignition electrode, the control box
amplifier may be damaged.
Separate the combustion head from the rest of the burner,
Fig. 11.
To do this, proceed as follows:
- loosen the 4 screws 3) and remove the hood 1);
- disengage the articulated coupling 7) from the gradu-
ated sector 8);
- remove screws 2) from the two slide bars 5);
- remove the 2 screws 4) and pull the burner back on
slide bars 5) by about 100 mm;
- disconnect the probe and electrode cables, then slide
off the burner completely from the slide bars.
Once this operation has been carried out, fix the flange
11)(Fig. 11) to the boiler plate, interposing the insulating
gasket 9)(Fig. 11) supplied.
Use the 4 screws supplied, with a tightening torque of 35 -
40 Nm, after protecting their thread with anti-seize prod-
ucts.
The seal between burner and boiler must be airtight. After
the start-up (see Ch. 5.3), check there is no leakage of flue
gases into the external environment.
1
2
Probe Electrode
Fig. 13
D613
Fig. 12
D8689
4

14
6461 GB
Installation
4.6 Combustion head adjustment
At this point of the installation, the combustion head is fixed
to the boiler as shown in Fig. 13.
Its adjustment is therefore particularly easy, which depends
solely on the maximum burner output.
Two adjustments of the head are foreseen:
the air adjustment;
the gas adjustment.
In the diagram of Fig. 16, find the notch at which to adjust
both air and central gas/air.
Air adjustment
Rotate the screw 2) until the notch you have found corre-
sponds with the front surface 1) of the flange.
Gas adjustment
Loosen the 4 screws) and rotate the ring nut 5) until the notch
you have found corresponds with the index 3) (Fig. 14).
Block the 3 screws 4).
Example
RS 70/M, burner output = 600 kW.
According to diagram Fig. 16 the gas and air adjustments for this output are carried out on notch 4.
NOTE
The diagram indicates the optimum adjustment for a type of boiler according to Fig. 4.
The adjustments indicated can be modified during the initial start-up.
Important
To facilitate adjustment, loosen the screw 3)
(Fig. 14), adjust and then lock.
3
5
4
1
2
Fig. 15
D8690
Fig. 14
CAUTION
Fig. 16
No. Notches
Maximum burner output
D9079
4

15 6461 GB
Installation
4
Once the combustion head adjustment is completed:
reassemble the burner on the guides 3) at about 100 mm
from the pipe coupling 4) - burner in the position shown in
Fig. 11;
insert the probe and electrode cables, then slide the burner
as far as the pipe coupling - burner in the position shown in
Fig. 17;
connect the socket of the maximum gas pressure switch;
refit the screws 2) on the slide bars 3);
fix the burner to the pipe coupling with the screws 1).
re-couple the articulated coupling 7) to the graduated
sector 6).
4.7 Assembly of the gas train
The gas train is type-approved according to standard EN 676
and is supplied separately from the burner.
The gas train can enter the burner from the right or left
side, depending on which is the most convenient, see
Fig. 18.
The gas train must be connected to the gas attachment
1)(Fig. 18) with the flange 2), the gasket 3) and the screws
4) supplied with the burner.
The gas solenoids must be as close as possible to the
burner, to ensure that the gas reaches the combustion
head within the safety time of 3 s.
Ensure that the maximum pressure necessary for the
burner is included in the calibration field of the pressure
adjuster.
When fitting the burner on the two guides, it is
advisable to gently draw out the high voltage cable
and flame detection probe cable until they are
slightly taut.
CAUTION
4
3
2
5
1
6
7
Fig. 17
D8691
See the accompanying instructions for the
adjustment of the gas train.
WARNING
D722
Fig. 18

16
6461 GB
4.8 Gas feeding line
Key (Fig. 19)
1 Gas input pipe
2 Manual valve
3 Vibration damping joint
4 Pressure gauge with pushbutton cock
5Filter
6A Includes:
–Filter
– working valve
– safety valve
– pressure adjuster
6C Includes
– safety valve
– working valve
6D Includes:
– safety valve
– working valve
7 Minimum gas pressure switch
8 Leak detection device, supplied as an accessory or incorporat-
ed, based on the gas train code. In compliance with the EN 676
standard, the leak detection control is compulsory for burners
with maximum outputs over 1200 kW.
9 Gasket, for “flanged” versions only
10 Pressure adjuster
11 Train-burner adaptor, supplied separately
P2 Upstream pressure of valves/adjuster
P3 Upstream pressure of the filter
L Gas train supplied separately
L1 The responsibility of the installer
Explosion danger due to fuel leaks in the presence
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.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
WARNING
Fig. 19
20057264
MB
20062223
MBC
20062227
DMV
20062228
CB
Installation

17 6461 GB
Installation
4.9 Electrical wiring
If the hood is still present, remove it and proceed with
the electrical wiring according to the layouts shown in
Appendix A.
Use flexible cables in compliance with the EN 60
335-1 standard.
All the cables to be connected to the burner must
be threaded through cable grommets.
See Fig. 20.
The use of the cable grommets can take various
forms. By way of example we indicate the following
mode:
1 - Three-phase power supply
2 - Single phase power supply
3-Gasvalves
4 - Gas pressure switch or the valve leak detection
device
5 - Consents/safety
6 - Available
Notes on safety for the electrical wiring
The electrical wiring must be carried out with the electrical supply disconnected.
Electrical wiring must be carried out by qualified personnel and in compliance with the regulations currently in force
in the country of destination. Refer to the electrical layouts given in Appendix A.
declines all responsibility for modifications or connections different from those shown in the electrical lay-
outs.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this man-
ual. See Fig. 8.
Do not invert the neutral with the phase in the electrical supply line. Any inversion would cause a lockout due to fir-
ing failure.
The burners RS 70-100-130/M have been type-approved for intermittent operation. This means they should com-
pulsorily be stopped at least once every 24 hours to enable the control box to perform checks of its own start-up
efficiency. Normally, burner stopping is guaranteed by the boiler's thermostat/pressure switch.
If this is not the case, a time switch should be fitted in series to IN to provide for burner shutdown at least once
every 24 hours. Refer to the electrical layouts given in Appendix A.
The electrical safety of the device is obtained only when it is correctly connected to an efficient earthing system,
made according to current standards. It is necessary to check this fundamental safety requirement. In the event of
doubt, have the electrical system checked by qualified personnel. Do not use the gas tubes as an earthing system
for electrical devices.
The electrical system must be suitable for the maximum input power of the device,as indicated on the label and in
the manual, checking in particular that the section of the cables is suitable for the input power of the appliance.
For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- use an omnipolar switch with an opening of at least 3 mm between the contacts, as indicated by the current safety
standards.
Do not touch the device with wet or damp body parts and/or in bare feet.
Do not pull the electric cables.
DANGER
6
A
1
B
6
5
3
4
6
D8692
Fig. 20
4

18
6461 GB
Installation
4.10 Calibration of the thermal relay
The thermal relay serves to avoid damage to the motor due to an
excessive absorption increase or if a phase is missing.
Refer to the table in wiring diagram No. 5 of Appendix A for the
calibration.
The protection is in any case ensured even if the minimum value of the
thermal relay scale is over the rating absorption of the motor.
This occurs when the motor power supply is 400 V / 460V.
To reset, in case of an intervention of the thermal relay, press button 1)
of Fig. 21.
The RS 70-100-130/M models leave the factory pre-set for 400 V
power supply.
If 230 V power supply is used, change the motor connection from star
to delta and change the setting of the thermal relay as well.
The RS 70-100-130/M models leave the factory precept for 380-460V power supply.
If 208-230V power supply is used, change the motor connection (from star to delta) and change the setting of the thermal relay as
well.
Fig. 21
2
1
D8267
Voltage 3 ~ 400 / 230V - 50Hz
Voltage 3 ~ 460 / 230V - 60Hz
4