Riello 20034365 Quick start guide

Installation, use and maintenance instructions
Instrucciones de instalación, uso y mantenimiento
20035512 (1) - 02/2011
Forced draught gas burners
Quemadores de gas con aire soplado
CODE - CÓDIGO MODEL - MODELO TYPE - TIPO
20034365 RS 100/M 34365X
GB
E
Progressive two-stage or modulating operation
Funcionamiento a dos llamas progresivo o modulante

1
20035512 GB
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 burner
Model: RS 100/M
Theseproductsareincompliancewiththefollowing Technical Standards:
EN 676
EN 292
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
Legnago, 26.06.2007
Mr. G. Conticini
Burners Division Department
The quality is guaranteed by a quality and management system
certified in accordance with UNI EN ISO 9001.

2
20035512 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 Burner weight 6
3.6 Overall dimensions 6
3.7 Firing rates 7
3.8 Burner components 8
3.9 Burner equipment 9
3.10 Servomotor 9
4Installation 10
4.1 Notes on safety for the installation 10
4.2 Handling 10
4.3 Preliminary checks 10
4.4 Operating position 11
4.5 Securing the burner to the boiler 11
4.6 Combustion head adjustment 13
4.7 Assembly of the gas train 15
4.8 Electrical wiring 16
4.9 Calibration of the thermal relay 17
5Start-up, calibration and operation of the
burner 18
5.1 Notes on safety for the first start-up 18
5.2 Operations before start-up 18
5.3 Burner start-up 19
5.4 Burner ignition 19
5.5 Burner adjustment 19
5.6 Operation sequence of the burner 22
5.7 Burner flame goes out during operation 22
5.8 Stopping of the burner 22
5.9 Measuring the ionisation current 23
5.10 Checking the air and gas pressure on the com-
bustion head 23
5.11 Final checks (with burner operating) 23
6Faults - Probable causes - Solutions 24
7Maintenance 25
7.1 Notes on safety for the maintenance 25
7.2 Maintenance programme 25
7.3 Opening the burner 26
7.4 Closing the burner 26
AAppendix - Electrical panel layout 27
BAppendix - Accessories (on request) 32
CAppendix - Firing rate on basis of air density 33

3
20035512 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 Assist-
ance 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
20035512 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.

5
20035512 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
RS 100/M TL 3 ~ 415 / 240V - 50/60Hz 20034365
Country of destination Gas category
AT - CH - CZ - DK - EE - ES - FI - GB - GR - HU - IE
IS - IT - LT - LV - NO - PT - SE - SI - SK - TR I2E
NL I2L
FR I2Er
DE I2ELL
BE I2E(R)B
LU - PL I2E
Range : R
Size
Fuel : S
L
LS
Natural gas
Light oil
Light oil / Methane
Adjustment : E Electronic cam
EV Electronic cam with variable speed (with Inverter)
Head: TC Standard head
TL Long head
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
Emission : ... Class 1 EN267 (light oil) - EN676 (gas)
MZ Class 2 EN267 (light oil) - EN676 (gas)
BLU Class 3 EN267 (light oil) - EN676 (gas)
MX Class 2 EN267 (light oil)
Class 3 EN676 (gas)
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
N Heavy oil
M Mechanical cam
3/400-230/50 3N / 400V-230V / 50Hz
P Proportional air/gas valve
R S 100 M TC FS1 3/400/50 230/50/60
BASIC DESIGNATION
EXTENDED DESIGNATION
MZ

6
20035512 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) Gas pressure on the pipe coupling test point 16) (Fig. 5) with zero pressure in the combustion chamber and at maximum burner output.
(3) Sound pressure measured in manufacturer's combustion laboratory, with burner operating on test boiler and at maximum output.
3.5 Burner weight
3.6 Overall dimensions
Model RS 100/M
Type 34365X
Output (1) maximum kW
Mcal/h 700 - 1340 602 - 1152
minimum kW
Mcal/h 150 129
Fuel Natural gas: G20 - G23 - G25
Gas pressure at max. output (2) -
Gas: G20/G25 mbar 11,4 - 17,1
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
Electrical supply 3 ~ 415 / 240 V 1N ~ 240V +/-10% 50/60 Hz
Fan motor (rating)
Operating current
Acceleration current
rpm
V
kW
A
A
2800
220/240 - 380/415
1,5
5,9 - 3,4
48 - 28
Ignition transformer V1 - V2
I1 - I2 230 V - 1 x 8 kV 1 A - 20 mA
Absorbed electrical power kW max 1,8
Protection level IP 44
Noise level (3) dBA 77
The weight of the burner complete with its packaging is shown in table.
Model kg
RS 100/M 75
Fig. 1
D9078
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 100/M 527 312 215 555 840 250-385 179 430 1161-1296 214 134 221 2”
Fig. 2

7
20035512 GB
Technical description of the burner
3
3.7 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
Fig. 3
The maximum output is chosen within area Aof the diagram.
The minimum output must not be lower than the minimum limit of the diagram.
Warning
The firing rate was obtained considering an ambient temperature of 20°C and an atmospheric pressure of 1013 mbar (approx. 0 m
above sea level), with the combustion head adjusted as shown in Ch. 4.6.
Pressure in combustion
chamber - mbar
D9755

8
20035512 GB
Technical description of the burner
3
3.8 Burner components
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Max. gas pressure switch
5 Servomotor controlling the gas butterfly valve and the air gate
valve (by means of a variable profile cam mechanism).
When the burner is stopped the air gate valve will be com-
pletely closed to reduce heat loss due to the flue draught,
which tends to draws air from the fan air inlet.
6 Plug-socket on ionisation proble cable
7 Pilot tube
8 Motor contactor and thermal cut-out with reset button
9 Power switch for different operations:
automatic - manual - off
Button for:
power increase - power reduction
10 Terminal strip for electrical connection
11 Fairleads for electrical connections by installer
12 Control box with lock-out pilot light and lock-out reset button
13 Flame inspection window
14 Minimum air pressure switch (differential operating type)
15 Slide bars for opening the burner and inspecting the combus-
tion head
16 Gas pressure test point and head fixing screw
17 Air pressure test point
18 Flame sensor probe
19 Air gate valve
20 Air inlet to fan
21 Screws securing fan to sleeve
22 Gas input pipework
23 Gas butterfly valve
24 Boiler mounting flange
25 Flame stability disk
26 Bracket for mounting the power regulator RWF40
27 Main valve ON/OFF selector
Two types of burner failure may occur:
• CONTROL BOX LOCK-OUT:
if the control box 12) pushbutton lights up, it indicates that the
burner is in lock-out.
To reset, press the pushbutton.
• MOTOR TRIP:
two-phase electricity supply; release by pressing the pushbut-
ton on thermal cutout 8).
Fig. 5
1
2
3
4
5
68
9
10 26 27
11 13 15 16 17 18
25
24
23
22
20
19
21 7
12 14
D9733

9
20035512 GB
Technical description of the burner
3
3.9 Burner equipment
The burner is supplied complete with:
Gas train flange
Flange gasket
4 screws to fix the M10x35 flange
Thermal insulation screen
4 screws to fix the M12x35 burner flange to the boiler
Fitting M20 x 1.5
Instruction manual
Spare parts list
3.10 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: 20°
Adjusts the ignition position and the MIN output.
Cam IV-V: non used.
WARNING
D3859
Fig. 7

10
20035512 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

11
20035512 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
100mm
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 100/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 100/M 250 mm 385 mm
Fig. 11
D8688
4

12
20035512 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

13
20035512 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 100/M, burner output = 900 kW.
According to diagram Fig. 16 the gas and air adjustments for this output are carried out on notch 5.
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
D9756
4

14
20035512 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).
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

15
20035512 GB
4.7 Assembly of the gas train
The gas train can enter the burner from the right or left side, depend-
ing 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 (colour of the
spring).
See the accompanying instructions for the adjustment
of the gas train.
D722
Fig. 18
WARNING
Installation

16
20035512 GB
Installation
4.8 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 firing
failure.
The burners RS 100/M 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 efficiency. Nor-
mally, 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

17
20035512 GB
Installation
4.9 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.
To reset, in case of an intervention of the thermal relay, press button 1)
of Fig. 21.
The RS 100/M models leave the factory pre-set for 415 V power sup-
ply.
Fig. 21
2
1
D8267
Voltage 3 ~ 415 / 240V - 50/60 Hz
4

18
20035512 GB
5.1 Notes on safety for the first start-up
5.2 Operations before start-up
Ensure that the gas supply company has carried out the supply line vent operations, eliminating air or inert gases from the piping.
Slowly open the manual valves situated upstream the gas train.
Adjust the minimum gas pressure switch (Fig. 22) to the start of the scale.
Adjust the maximum gas pressure switch (Fig. 23) to the end of the scale.
Adjust the air pressure switch (Fig. 24) to the start of the scale.
Check the gas supply pressure by connecting a
pressure gauge to the pressure test point 1)(Fig. 25)
of the minimum gas pressure switch: it must be low-
er than the maximum allowed pressure of the gas
train, as shown on the characteristics label.
Bleed the air from the piping of the gas train, con-
necting a plastic tube to the pressure test point
1)(Fig. 25) of the minimum gas pressure switch.
Take the vent tube outside the building so you can
notice the smell of gas.
Connect two lamps or testers to the two gas line so-
lenoids to check the exact moment at which voltage
is supplied.
This operation is unnecessary if each of the two so-
lenoids is equipped with an indicator light that sig-
nals voltage passing through.
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
Check the correct working of the adjustment, com-
mand and safety devices.
An excessive gas pressure can dam-
age the components of the gas train
and lead to a risk of explosion.
Before starting up the burner, it is good
practice to adjust the gas train so that
ignition takes place in conditions of
maximum safety, i.e. with gas delivery at
the minimum.
WARNING
WARNING
Fig. 22
Minimum gas pressure switch
Fig. 23
Maximum gas pressure switch
Fig. 24
D3854
Air pressure switch
D3856
D3855
1
E9330 Fig. 25
DANGER
WARNING
Start-up, calibration and operation of the burner
5