Riello RL 190/M Quick start guide

20024198 (1) - 03/2010
Installation, use and maintenance instructions
Instrucciones de Instalación, Funcionamiento y Mantenimiento
Light oil burners
Quemadores de gasóleo
Progressive two-stage or modulating operation
Funcionamiento a dos llamas progresivas o modulante
CODE - CÓDIGO MODEL - MODELO TYPE - TIPO
3477810 - 3477811 RL 190/M 674 T1
20011021 - 20011022 RL 190/M 674 T1
GB
E

1 20024198
GB
1 Declarations................................................................................................................................................................................ 2
2 Information and general instructions....................................................................................................................................... 3
2.1 Information about the instruction manual ..................................................................................................................................................3
2.1.1 General dangers........................................................................................................................................................................................3
2.1.2 Danger: live components...........................................................................................................................................................................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 Technical data ...........................................................................................................................................................................................6
4.1.1 Variants .....................................................................................................................................................................................................6
4.1.2 Accessories (optional): ..............................................................................................................................................................................7
4.2 Burner description .....................................................................................................................................................................................7
4.2.1 Weight - approximate measurements .......................................................................................................................................................7
4.2.2 Max. dimensions - approximate measurements........................................................................................................................................8
4.2.3 Standard equipment ..................................................................................................................................................................................8
4.3 Firing rates ................................................................................................................................................................................................8
4.3.1 Test boiler..................................................................................................................................................................................................9
5 Installation ................................................................................................................................................................................ 10
5.1 Handling ..................................................................................................................................................................................................10
5.2 Preliminary checks ..................................................................................................................................................................................10
5.3 Boiler plate ..............................................................................................................................................................................................11
5.4 Blast tube length......................................................................................................................................................................................11
5.5 Securing the burner to the boiler .............................................................................................................................................................11
5.6 Choice of nozzle......................................................................................................................................................................................12
5.7 Nozzle assembly .....................................................................................................................................................................................12
5.8 Combustion head setting.........................................................................................................................................................................13
6 Electrical system...................................................................................................................................................................... 14
6.1 Electrical system (factory set) .................................................................................................................................................................15
6.1.1 Electrical connections..............................................................................................................................................................................15
7 Hydraulic system...................................................................................................................................................................... 18
7.1 Fuel supply ..............................................................................................................................................................................................18
7.1.1 Hydraulic connections .............................................................................................................................................................................19
7.1.2 Servomotor..............................................................................................................................................................................................19
7.1.3 Oil pressure switch ..................................................................................................................................................................................19
7.2 Pump .......................................................................................................................................................................................................20
7.2.1 Pump priming ..........................................................................................................................................................................................20
8 Burner calibration .................................................................................................................................................................... 21
8.1 Burner firing.............................................................................................................................................................................................22
8.2 Burner operation......................................................................................................................................................................................24
8.2.1 Burner starting.........................................................................................................................................................................................24
8.2.2 Steady state operation ............................................................................................................................................................................24
8.2.3 Firing failure.............................................................................................................................................................................................25
8.2.4 Undesired shutdown during operation.....................................................................................................................................................25
8.2.5 Final checks ............................................................................................................................................................................................25
9 Maintenance.............................................................................................................................................................................. 26

20024198 2
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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: RL 190/M
These products are in compliance with the following Technical Standards:
EN 267
EN 292
and according to the European Directives:
MD 2006/42/EC Machine Directive
LVD 73/23/EEC - 2006/95/EC Low Voltage Directive
EMC 89/336/EEC - 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.
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx limits specified by German standard “1. BImSchV 2009”.
Product Type Model
Light oil burner 674 T1 RL 190/M
Legnago, 15.03.2010 Mr. G. Conticini
Burners Division Department
RIELLO S.p.A.
CE-05 07 90223 001

3 20024198
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Information and general instructions
2.1 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
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 Assist-
ance 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.
2.1.1 General dangers
The dangers can be of 3 levels, as indicated below.
2.1.2 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 Assist-
ance Centre;
The system supplier carefully informs 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.
2 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.
DANGER
This symbol indicates operations which, if not car-
ried out correctly, lead to electric shocks with le-
thal consequences.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the
machine with respect for the environment.
........................................................................................
........................................................................................
........................................................................................
........................................................................................

20024198 4
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Information and general instructions
2.2 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.
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 equip-
ment;
use of the burner with safety devices that are faulty, incor-
rectly applied and/or not working;
installation of untested supplementary components on the
burner;
powering of the burner with unsuitable fuels;
faults in the fuel power supply system;
use of the burner even following an error and/or an irregu-
larity;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the flame, as structur-
ally 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.
furthermore declines any and every responsibility
for the failure to observe the contents of this manual.
WARNING
Failure to observe the information given in this
manual, operating negligence, incorrect installa-
tion and the carrying out of non authorised modifi-
cations will result in the annulment by of
the guarantee that it supplies with the burner.

5 20024198
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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 tech-
nical rules of safety and envisaging all the potential danger situ-
ations.
It is necessary, however, to bear in mind that the imprudent and
clumsy use of the equipment may lead to situations of death risk
for the user or third parties, as well as the damaging of the burner
or other items. Inattention, thoughtlessness and excessive confi-
dence often cause accidents; the same applies to tiredness and
sleepiness.
It is a good idea to remember the following:
The burner must only be used as expressly described. Any
other use should be considered improper and therefore
dangerous.
In particular:
it can be applied to boilers operating with water, steam, dia-
thermic oil, and to other users expressly named by the man-
ufacturer;
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 room temperature must
all be within the values indicated in the instruction manual.
Modification of the burner to alter its performance and desti-
nations is not allowed.
The burner must be used in exemplary technical safety con-
ditions. Any disturbances that could compromise safety
must be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is re-
sponsible for the machine and for the training of the people work-
ing around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
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 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
problem or dangerous situation that may arise.
The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence com-
promise operating safety. The manufacturer therefore
declines any and all responsibility for any damage that may
be caused by the use of non-original parts.
3 Safety and prevention

20024198 6
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Technical description of the burner
4.1 Technical data
(1) Reference conditions: Ambient temperature 20 °C - Barometric pressure 1000 mbar - Altitude 100 m a.s.l.
(2) Sound pressure measured in manufacturer’s combustion laboratory, with burner operating on test boiler and at maximum rated
output.
4.1.1 Variants
4 Technical description of the burner
MODEL RL 190/M
CODE 3477810 - 3477811 20011021 - 20011022
OUTPUT (1)
DELIVERY (1)
2nd stage° kW
Mcal/h
kg/h
1423 - 2431
1224 - 2091
120 - 205
1st stage° kW
Mcal/h
kg/h
534 - 1423
459 - 1224
45 - 120
FUEL LIGHT OIL
- net calorific value kWh/kg
Mcal/kg
11,8
10,2 (10.200 Kcal/kg)
- density kg/dm30,82 - 0,85
- Viscosity at 20 °C mm2/s max 6 (1,5 °E - 6 cSt)
OPERATION • Intermittent (min. 1 stop in 24 hours). These burners are also fiitted for
the continuous operation, if they are equipped with the control box
LANDIS type LOK 16.250 A27 (interchangeable with the burner con-
trol box LANDIS LAL 1.25).
• Progressive two-stage (modulating by Kit)
NOZZLES number 1 (nozzle with return)
STANDARD APPLICATIONS Boilers: water, steam, diathermic oil
AMBIENT TEMPERATURE °C 0 - 40
COMBUSTION AIR TEMPERATURE °C max 60
ELECTRICAL SUPPLY V
Hz
400 with neutral ~ +/- 10%
50 - three-phase
230 with neutral ~ +/- 10%
50 - three-phase
ELECTRIC MOTOR rpm
W
V
2800
4500
400
2800
4500
230
Operating current A9,1 15,8
Acceleration current A73 126
IGNITION TRANSFORMER V1 - V2
I1 - I2
230 V - 2 x 5 kV
1,9 A - 35 mA
Control box Landis & Gyr LAL 1.25..
PUMP TA3 delivery (at 20 bar)
pressure range
fuel temperature
kg/h
bar
°C max
665
7 - 40
140
ELECTRICAL POWER CONSUMPTION W max 5500
ELECTRICAL PROTECTION IP 44
NOISE LEVELS (2) dBA 83,9
Model Code Power supply
electrical
RL 190/M 3477810
3477811 400 V
RL 190/M 20011021
20011022 230 V

7 20024198
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Technical description of the burner
4.1.2 Accessories (optional):
• OUTPUT MODULATION REGULATOR KIT
Two components should be ordered:
the output regulator to install on the burner;
the probe to install on the heat generator.
4.2 Burner description
1 Ignition electrodes
2 Combustion head
3 Screw for combustion head adjustment
4 Screw for fixing fan to flange
5 Oil pressure switch
6 Pressure gauge for pressure on nozzle return
7 Pressure gauge for pressure on nozzle delivery
8Pump
9 Non-drip nozzle holder
10 Air gate valves
11 Safety solenoid valve
12 Fan pressure test point
13 Boiler mounting flange
14 Flame stability disk
15 Slide bars for opening the burner and inspecting the com-
bustion head
16 Extensions for slide bars 15)
17 Electrical motor
18 Ignition transformer
19 Motor contactor and thermal cut-out with reset button
20 Power switch for different operations:
automatic - manual - off.
Button for:
power increase - power reduction.
21 Terminal strip
22 Fairleads for electrical connections by installer
23 Control box with lock-out pilot light and lock-out reset button
24 Flame inspection window
25 Photocell for flame presence control
26 Valve assembly with pressure regulator on nozzle return
27 Servomotor, provides adjustment of fuel delivery regulator
and of air gate valve.
When the burner is not operating the air gate valve is fully
closed in order to reduce to a minimum heat dispersion from
the boiler due to the flue draught which draws air from the
fan suction inlet.
Two types of burner failure may occur:
Control Box Lock-out: if the control box 23) (Fig. 1) pushbutton
lights up, it indicates that the burner is in lock-out.
To reset, press the pushbutton, no sooner than 10 s after the
lock-out.
Motor trip: release by pressing the pushbutton on thermal cut-out
19)(Fig. 1).
Tab. A
4.2.1 Weight - approximate measurements
• The weight of the burner complete with its packaging is
shown in table (Tab. A)
PARAMETER TO BE CHECKED PROBE POWER REGULATOR
Range Type Code Type Code
Temperature - 100...+ 500 °°C PT 100 3010110 RWF40 3010212
Pressure 0...2,5 bar
0...16 bar
Probe with output
4...20 mA
3010213
3010214
D3931
Fig. 1
kg
RL 190/M 95

20024198 8
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Technical description of the burner
4.2.2 Max. dimensions - approximate measurements The maximum dimensions of the burner are given in (Fig. 2).
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part withdrawn on the slide
bars.
The dimensions of the open burner are indicated by position I.
4.2.3 Standard equipment
2 - Flexible hoses (L = 1340 mm)
2 - Gaskets for flexible hoses
2 - Nipples for flexible hoses
1 - Thermal insulation screen
4 - Extensions 16)(Fig. 1) for slide bars 15)(Fig. 1)
4 - Screws to secure the burner flange to the boiler: M 16 x 40
1 - Instruction booklet
1 - Spare parts list
4.3 Firing rates
During operation, burner output varies between:
MINIMUM OUTPUT: area A;
MAXIMUM OUTPUT: area B.
The work point may be found by plotting a vertical line from the
desired delivery and a horizontal line from the pressure in the
combustion chamber. The intersection of these two lines is the
work point which must lie within area A, for MIN output, and within
area B, for MAX output.
Burner firing rates according to air density
The FIRING RATE area values have been obtained considering
a surrounding temperature of 20 °C, and an atmospheric pres-
sure of 1000 mbar (approx. 100 m above sea level) and with the
combustion head adjusted as shown on page 8.
It may be that a burner has to operate with combustive air at a
higher temperature and/or higher altitudes.
The heating of the air and the increase in altitude produce the
same effect: the expansion of the air volume (i.e. the reduction of
its density).
The delivery of the burner fan remains essentially the same, but
the oxygen per m3of air, and the thrust (discharge head) of the
fan are reduced.
It is therefore important to know if the maximum output requested
from the burner at a determinate combustion chamber pressure
remains within the firing rate of the burner even with the changed
temperature and altitude conditions.
Fig. 2
D1217
mm ABCDEFGH I
RL 190/M 813 366 447 555 712 370 222 430 1166
mbar
Fig. 3
D1975
Burner output
Combustion chamber pressure

9 20024198
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Technical description of the burner
(1) Average barometric pressure Tab. B
To check it, proceed as follows:
1 Find the corrective factor F (Tab. B) relating to the air tem-
perature and altitude of the system.
2 Divide the burner’s delivery Q by F in order to obtain the
equivalent delivery Qe:
3 In the firing rate range of the burner, (Fig. 4), indicate the
work point defined by:
Qe = equivalent delivery
H1 = combustion chamber pressure
The resulting point A must remain within the firing rate
range.
4 Trace a vertical line from point A, (Fig. 4), and find the maxi-
mum pressure H2 of the firing rate.
5 Multiply H2 by F to obtain the maximum lowered pressure
H3 of the firing rate
If H3 is greater than H1, as in (Fig. 4), the burner can produce the
delivery requested.
If H3 is lower than H1, the burner’s delivery must be reduced. A
reduction in delivery is accompanied by a reduction of the pres-
sure in the combustion chamber:
Qr = reduced delivery
H1r = reduced pressure
Example, a 5% delivery reduction:
Qr = Q x 0.95
H1r = H1 x (0,95)2
With the new values - Qr and H1r - repeat steps 2 - 5.
4.3.1 Test boiler
The firing rates were set in relation to special test boilers in ac-
cordance with the methods defined in EN 267 standards.
Fig. 5 indicates the diameter and length of the test combustion
chamber.
Example:
delivery 200 kg/hour:
diameter = 80 cm; length = 3,5 m.
Whenever the burner is operated in a much smaller commercial-
ly-available combustion chamber, a preliminary test should be
performed.
m a.s.l.
(1)
F
AIR
°C
M mbar 0 5 10 15 20 25 30 40
0
100
200
300
400
500
600
700
800
900
1000
1200
1400
1600
1800
2000
1013
1000
989
978
966
955
944
932
921
910
898
878
856
836
815
794
1,087
1,073
1,061
1,050
1,037
1,025
1,013
1,000
0,988
0,977
0,964
0,942
0,919
0,897
0,875
0,852
1,068
1,054
1,042
1,031
1,018
1,007
0,995
0,982
0,971
0,959
0,946
0,925
0,902
0,881
0,859
0,837
1,049
1,035
1,024
1,013
1,000
0,989
0,977
0,965
0,954
0,942
0,930
0,909
0,886
0,866
0,844
0,822
1,031
1,017
1,006
0,995
0,983
0,972
0,960
0,948
0,937
0,926
0,914
0,893
0,871
0,851
0,829
0,808
1,013
1,000
0,989
0,978
0,966
0,955
0,944
0,932
0,921
0,910
0,898
0,878
0,856
0,836
0,815
0,794
0,996
0,983
0,972
0,962
0,950
0,939
0,928
0,916
0,906
0,895
0,883
0,863
0,842
0,822
0,801
0,781
0,980
0,967
0,956
0,946
0,934
0,923
0,913
0,901
0,891
0,880
0,868
0,849
0,828
0,808
0,788
0,768
0,948
0,936
0,926
0,916
0,904
0,894
0,884
0,872
0,862
0,852
0,841
0,822
0,801
0,783
0,763
0,743
Qe = Q : F (kg/h)
H3 = H2 : F (mbar)
Qe kg/h
mbar
D388
Fig. 4
WARNING
the combustion head must be adjusted in respect
to the equivalent delivery Qe.
H1r = H1x ()
Qr
Q
2
D688 Fig. 5
combustion chamber pressure mbar

20024198 10
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Installation
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.
5.1 Handling
The packaging of the burner includes a wooden platform, so it is possible to move the burner (still packaged) with a transpallet truck
or fork lift truck.
5.2 Preliminary checks
Checking the consignment
Checking the characteristics of the burner
Check the identification label of the burner, showing:
the model (see A in Fig. 6) and type of burner (B);
the year of manufacture, in cryptographic form (C);
the serial number (D);
the electrical input power (E);
the types of fuel used and the relative supply pressures (F);
the data of the burner’s minimum and maximum output pos-
sibilities (G) (see Firing rate)
5 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
WARNING
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
The handling operations for the burner can be highly dangerous if not carried out with the 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.
CAUTION
After positioning the burner near the installation point, correctly dispose of all residual packaging, separating the vari-
ous types of material.
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; con-
tact 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.
D8965
RIELLO S.p.A.
I−37045 Legnago (VR)
0036
A
BC
DE
G
F
Fig. 6
WARNING
The output of the burner must be within the boil-
er’s firing rate;
WARNING
A burner label that has been tampered with, re-
moved or is missing, along with anything else that
prevents the definite identification of the burner
makes any installation or maintenance work diffi-
cult.

11 20024198
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Installation
5.3 Boiler plate
Drill the combustion chamber locking plate as shown in (Fig. 7).
The position of the threaded holes can be marked using the ther-
mal screen supplied with the burner.
5.4 Blast tube length
The length of the blast tube must be selected according to the in-
dications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door com-
plete with its fettling. The length available, L (mm), is 370 mm.
For boilers with front flue passes 12) or flame inversion cham-
bers, protective fettling in refractory material 10) must be inserted
between the boiler fettling 11) and the blast tube 9).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers having a water-cooled front the refractory fettling 10)-
11) (Fig. 8) is not required unless it is expressly requested by the
boiler manufacturer.
5.5 Securing the burner to the boiler
Disassemble the blast tube 9) from the burner 6) by proceeding
as follows:
– Loosen the four screws 3) and remove the cover 1).
– Remove the screws 2) from the two slide bars 5).
– Remove the two screws 4) fixing the burner 6) to the flange 7).
– Withdraw the blast tube 9) complete with flange 7) and slide
bars 5).
Secure flange 7) (Fig. 8) to the boiler plate interposing the sup-
plied gasket 8) (Fig. 8). Use the 4 screws provided after having
protected the thread with antiscruffing products.
The burner-boiler seal must be airtight.
D455 Fig. 7
mm A B C
RL 190/M 230 325-368 M 16
Fig. 8
D1976

20024198 12
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Installation
5.6 Choice of nozzle
See diagrams (Fig. 25 and Fig. 26, page 21).
In case an intermediate delivery between the two values indicat-
ed in the diagrams (Fig. 25 and Fig. 26, page 21), is required, a
nozzle with higher delivery must be chosen. Delivery reduction
will be obtained by means of the pressure regulator.
RECOMMENDED NOZZLES:
Type A3 or A4 Bergonzo nozzles - 45° angle
5.7 Nozzle assembly
At this stage of installation the burner is still disassembled from
the blast tube; it is therefore possible to fit the nozzle with the box
spanner 1) (Fig. 9), fitting the spanner through the central hole in
the flame stability disk. Do not use any sealing products such as
gaskets, sealing compound, or tape. Be careful to avoid damag-
ing the nozzle sealing seat.
Make sure that the electrodes are positioned as shown in
(Fig. 10)
Finally refit the burner 3) (Fig. 11) to the slide bars 2) and slide it
up to the flange 5), keeping it slightly raised to prevent the
flame stability disk from pressing against the blast tube.
Tighten the screws 1) on the slide bars 2) and screws 4) fixing the
burner to the flange.
If it proves necessary to change a nozzle with the burner already
fitted to the boiler, proceed as outlined below:
– Retract the burner on its slide bars as shown in (Fig. 8,
page 11).
– Remove the nuts 1) (Fig. 12) and the disk 2).
– Use spanner 3) (Fig. 12) to change the nozzles.
D1220 Fig. 9
Fig. 10
D856
Fig. 11
D1977
Fig. 12
D1222

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Installation
5.8 Combustion head setting
The setting of the combustion head depends exclusively on the
maximum burner delivery at which it will be operating.
Turn screw 4) (Fig. 13) until the notch shown in diagram (Fig. 14)
is level with the front surface of flange 5) (Fig. 13).
Example:
RL 190/M, maximum light oil delivery = 150 kg/h
Diagram (Fig. 14) indicates that for a delivery of 150 kg/h the
RL 190/M Model requires the combustion head to be set to ap-
prox. three notches, as shown in (Fig. 13)
Fig. 13
D462
D1985
Fig. 14
Notches no.
Light oil delivery in 2nd stage kg/h

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Electrical system
6 Electrical system
Notes on safety for the electrical wiring
DANGER
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 wiring diagrams.
declines all responsibility for modifications or connections different from those shown in the electrical
layouts.
Do not invert the neutral with the phase in the electrical supply line. Any inversion would cause a lockout due to
firing failure.
The RL 190/M burners have been type-approved for intermittent operation. This means they should compulsorily
be stopped at least once every 24 hours to enable the control box to perform checks of its own start-up effi-
ciency. Normally the boiler’s thermostat/pressure switch ensures the stopping of the burner.
If this is not the case, it is necessary to apply in series with IN a timer switch that turns off the burner at least once
every twenty-four hours. Refer to the wiring diagrams.
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.
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 device.
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 (overvoltage category) 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.

15 20024198
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Electrical system
6.1 Electrical system (factory set)
Key to wiring diagram (Fig. 15)
CMV - Motor contactor
LAL 1.25 - Control box
FR - Photocell
MB - Terminal strip
MV - Fan motor
PO - Oil pressure switch
RT - Thermal cut-out
S1 - Power switch for different operations:
MAN = manual
AUT = automatic
OFF = off
S2 - Button for:
– = power reduction
+ = power increase
SM - Servomotor
TA - Ignition transformer
TB - Burner ground (earth) connection
VM - Delivery pump valve
VS - Delivery pump valve (safety valve)
VS1 - Safety valve on return
VU - Valve on nozzle return
6.1.1 Electrical connections
Set up by the installer
Use flexible cables according to regulation EN 60 335-1:
if in PVC boot, use at least H05 VV-F
if in rubber boot, use at least H05 RR-F.
All the cables to be connected to the burner terminal strip 8)
(Fig. 16) must be routed through the fairleads.
The fairleads can be used in various ways. One example is given
below:
RL 190/M (Fig. 16)
1 Pg 13,5 Three-phase power supply
2 Pg 11 Single-phase power supply
3 Pg 11 Control device TL
4 Pg 9 Control device TR or probe (RWF40)
5 Pg 9 Set up for faird lead
6 Pg 11 Set up for faird lead
7 Pg 13,5 Set up for faird lead
Fig. 15
D1188
D1225
Fig. 16

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Electrical system
RL 190/M electrical connection three-phase 230/400 V power supply with neutral phase wire
Fuses and cables section layout, see table (Fig. 17).
Cable section not indicated: 1.5 mm2.
Key to Layout (Fig. 17) - (Fig. 18)
BT - Temperature probe
BP - Pressure probe
IN - Manual burner stop switch
MB - Terminal strip
RS - Remote lock-out reset button (if present)
S - Remote lock-out signal
TL - Limit control device system: this shuts down the burner
when the boiler temperature or pressure exceeds the set-
point value.
TR - High-low mode control device system: this controls oper-
ating stages 1 and 2 and the TR load control is not re-
quired when the regulator RWF40 is connected as its
function is performed by the regulator RWF40 itself.
TS - Safety control device system: this operates when TL is
faulty.
Alternatively, if single stage operation is required, instead of con-
trol device TR install a jumper lead between terminal 5 and 6 of
the terminal strip.
Fig. 17
D866
RL 190/M
230 V 400 V
FAT25T25
Lmm22.5 2.5
Fig. 18
D1910
WARNING
The burner is factory set for two-stage operation
and the TR remote control device that commands
light oil valve V2 must therefore be connected.

17 20024198
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Electrical system
NOTE:
The RL 190/M burner has been type- approved for intermit-
tent operation. This means they should compulsorily be
stopped at least once every 24 hours to enable the control
box to perform checks of its own efficiency at start-up. Burn-
er halts are normally provided for automatically by the boiler
load control system.
If this is not the case, it is necessary to apply in series with
IN a timer switch that turns off the burner at least once every
twenty-four hours.
These burners are also fiitted for the continuous operation,
if they are equipped with the control box LANDIS type LOK
16.250 A27 (interchangeable with the burner control box
LANDIS LAL 1.25).
Model Thermal relay adjustment
RL 190/M - 230 V 16 A
RL 190/M - 400 V 9,5 A
WARNING
Do not invert the neutral with the phase in the
electrical supply line.

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Hydraulic system
7.1 Fuel supply
Double-pipe circuit (Fig. 19)
The burner is equipped with a self-priming pump which is capable
of feeding itself within the limits listed in the table at the side.
The tank higher than the burner A
The distance “P” must not exceed 10 meters in order to avoid
subjecting the pump’s seal to excessive strain; the distance “V”
must not exceed 4 meters in order to permit pump self-priming
even when the tank is almost completely empty.
The tank lower than the burner B
Pump depression values higher than 0.45 bar (35 cm Hg) must
not be exceeded because at higher levels gas is released from
the fuel, the pump starts making noise and its working life-span
decreases.
It is good practice to ensure that the return and suction lines enter
the burner from the same height; in this way it will be less proba-
ble that the suction line fails to prime or stops priming.
The loop circuit
A loop circuit consists of a loop of piping departing from and re-
turning to the tank with an auxiliary pump that circulates the fuel
under pressure. A branch connection from the loop goes to feed
the burner. This circuit is extremely useful whenever the burner
pump does not succeed in self-priming because the tank dis-
tance and/or height difference are higher than the values listed in
the table.
Tab. C
Key
H = Pump/foot valve height difference
L = Piping length
Ø = Inside pipe diameter
1 = Burner
2=Pump
3=Filter
4 = Manual on/off valve
5 = Suction line
6 = Foot valve
7 = Rapid closing manual valve remote controlled (only Italy)
8 = On/off solenoid valve (only Italy)
9 = Return line
10 = Check valve (only Italy)
7 Hydraulic system
Fig. 19
D701
+ H
- H
(m)
L (m)
Ø (mm)
16 18
+ 4.0 60 80
+ 3.0 50 70
+ 2.0 40 60
+ 1.5 35 55
+ 1.0 30 50
+ 0.5 25 45
02040
- 0.5 18 35
- 1.0 15 30
- 1,5 13 25
- 2.0 10 20
- 3.0 5 10
- 4.0 - 6