CIB UNIGAS G258A User manual

M039704CA 0.0 05/2023
BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES - ГОРЕЛКИ
Microprocessor controlled
MANUAL OF INSTALLATION - USE - MAINTENANCE
LMV5x
Gas burners
G258A
G335A
G380A
G400A

2
DANGERS, WARNINGS AND NOTES OF CAUTION
The following:
Entails the customer’s acknowledgement and acceptance of the com-
pany’s general terms and conditions of sale, in force at the date of
order confirmation and available in the appendix to the current price
lists.
Is intended exclusively for specialised, experienced and trained users
able to operate in conditions that are safe for people, the device and
the environment, and in full compliance with the requirements set out
on the following pages and with current health and safety regulations.
Information regarding assembly/installation, maintenance, replacement
and repair is always and exclusively intended for (and therefore only to be
carried out by) specialised personnel and/or directly by the Authorised
Technical Service
IMPORTANT :
The supply has been made at the best conditions on the basis of the
customer’s order and technical indications concerning the state of the pla-
ces and the installation systems, as well as the need to prepare certain
certifications and / or additional adaptations with respect to the standard
observed and transmitted for each product. In this respect, the manufac-
turer declines any responsibility for complaints, malfunctions, criticalities,
damages and/or anything else consequent to incomplete, inaccurate and/
or missing information, as well as failure to comply with the technical
requirements and installation regulations, initial start-up, operational
management and maintenance.
For proper operation of the device, it is necessary to ensure the readabi-
lity and conservation of the manual, also for future reference. In case of
deterioration or more simply for reasons of technical and operational
insight, contact the manufacturer directly. Text, descriptions, images,
examples and anything else contained in this document are the exclusive
property of the manufacturer. Any reproduction is prohibited.
RISK ANALYSIS
Instruction manual supplied with the burner:
This is an integral and essential part of the product and must not be sepa-
rated from it. It must therefore be kept carefully for any necessary consul-
tation and must accompany the burner even if it is transferred to another
owner or user, or to another system. In the event of damage or loss, ano-
ther copy must be requested from the local customer service centre;
Delivery of the system and instruction manual
.
The supplier of the system is obliged to accurately inform the user about:–
Use of the system;
– any further testing that may be necessary before activating the system;
– maintenance and the requirement to have the system checked at least
once a year by a contractor or other specialised technician.
To ensure periodic monitoring, the manufacturer recommends drawing up
a Maintenance Agreement.
WARRANTY AND LIABILITY
In particular, warranty and liability claims will no longer be valid in the
event of damage to persons and/or property if such damage is 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;
- Operation by unqualified personnel;
- Carrying out of unauthorised changes to the device;
- Use of the burner with safety devices that are faulty, incorrectly applied
and/or not working;
- Installation of untested supplementary components on the burner;
- Powering of the burner with unsuitable fuels;
- Faults in the fuel supply system;
- Use of the burner even after an error and/or fault has occurred;
- Repairs and/or overhauls incorrectly carried out;
- Modification of the combustion chamber with inserts that prevent the
regular development of the structurally established flame;
- Insufficient and inappropriate supervision and care of the burner compo-
nents most subject to wear and tear;
- Use of non-original components, whether spare parts, kits, accessories
and optionals;
- Force majeure.
Furthermore, the manufacturer declines all responsibility for non-
compliance with this manual.
Personnel training
The user is the person, organisation or company that has acquired the
appliance and intends to use it for the specific purpose. The user is
responsible for the appliance and for training the personnel that operate it.
The user:
- Undertakes to entrust the machine to suitably trained and qualified per-
sonnel;
- Must take all measures necessary to prevent unauthorised people gai-
ning access to the appliance;
- Undertakes to adequately inform personnel about application and obser-
vance of the safety requirements, and therefore ensure that they are
familiar with the operating instructions and safety requirements;
- Must inform the manufacturer if any faults or malfunctions of the acci-
dent prevention systems occur, and if there is any suspected danger;
- Personnel must always use the personal protective equipment required
by law and follow the instructions provided in this manual;
- Personnel must observe all danger and caution notices on the
appliance;
- Personnel must not carry out, on their own initiative, operations or inter-
ventions outside their area of expertise;
- Personnel must inform their superiors of any problem and danger that
may arise;
- The assembly of parts of other makes, or any modifications made, may
alter the characteristics of the appliance and may therefore compromise
operational safety. The manufacturer therefore declines all responsibility
for damages arising from the use of non-original parts.
GENERAL INTRODUCTION
The equipment must be installed in compliance with the regulations in
force, following the manufacturer’s instructions, by qualified personnel.
Qualified personnel means those having technical knowledge in the
field of components for civil or industrial heating systems, sanitary hot
water generation and particularly service centres authorised by the
manufacturer.
Improper installation may cause injury to people and animals, or
damage to property, for which the manufacturer cannot be held liable.
Remove all packaging material and inspect the equipment for integrity.
In case of any doubt, do not use the unit - contact the supplier.
The packaging materials (wooden crate, nails, fastening devices, plastic
bags, foamed polystyrene, etc), should not be left within the reach of chil-
dren, as they may prove harmful.
Before any cleaning or servicing operation, disconnect the unit from
the mains by turning the master switch OFF, and/or through the cutout
devices that are provided.
Make sure that inlet or exhaust grilles are unobstructed.
In case of breakdown and/or defective unit operation, disconnect the
unit. Make no attempt to repair the unit or take any direct action.
Contact qualified personnel only.
Units shall be repaired exclusively by a servicing centre, duly authorised
by the manufacturer, with original spare parts and accessories.
Failure to comply with the above instructions is likely to impair the unit’s
safety.
To ensure equipment efficiency and proper operation, it is essential that
maintenance operations are performed by qualified personnel at regular
intervals, following the manufacturer’s instructions.
When a decision is made to discontinue the use of the equipment,
This manual is supplied as an integral and essential part of
the product and must be delivered to the user.
Information included in this section are dedicated both to the
user and to personnel following product installation and
maintenance.
The user will find further information about operating and use
restrictions, in the second section of this manual. we highly
recommend to read it.
Carefully keep this manual for future reference.
WARNING! Failure to comply with this manual, operational
negligence, incorrect installation and unauthorised modifica-
tions will result in the manufacturer’s warranty for the burner
being voided.

3
those parts likely to constitute sources of danger shall be made harm-
less.
In case the equipment is to be sold or transferred to another user, or in
case the original user should move and leave the unit behind, make
sure that these instructions accompany the equipment at all times so
that they can be consulted by the new owner and/or the installer.
This unit shall be employed exclusively for the use for which it is
meant. Any other use shall be considered as improper and, therefore,
dangerous.
The manufacturer shall not be held liable, by agreement or otherwise, for
WARNING! Failure to observe the information given in this manual, ope-
rating negligence, incorrect installation and carrying out of non authorised
modifications will result in the annulment by the manufacturer of the gua-
rantee that it supplies with the burner.
The damages resulting from improper installation, use and failure to com-
ply with the instructions supplied by the manufacturer.The occurrence of
any of the following circustances may cause explosions, polluting unburnt
gases (example: carbon monoxide CO), burns, serious harm to people,
animals and things:
- Failure to comply with one of the WARNINGS in this chapter
- Incorrect handling, installation, adjustment or maintenance of the burner
- Incorrect use of the burner or incorrect use of its parts or optional supply
SPECIAL INSTRUCTIONS FOR BURNERS
a Make the following checks:
• the burner should be installed in a suitable room, with ventilation ope-
nings complying with the requirements of the regulations in force, and
sufficient for good combustion;
• only burners designed according to the regulations in force should be
used;
• this burner should be employed exclusively for the use for which it
was designed;
• before connecting the burner, make sure that the unit rating is the
same as delivery mains (electricity, gas oil, or other fuel);
• observe caution with hot burner components. These are, usually,
near to the flame and the fuel pre-heating system, they become hot
during the unit operation and will remain hot for some time after the
burner has stopped.
When the decision is made to discontinue the use of the burner, the user
shall have qualified personnel carry out the following operations:
a • remove the power supply by disconnecting the power cord from the
mains;
b • disconnect the fuel supply by means of the hand-operated shutoff
valve and remove the control handwheels from their spindles.
Special warnings
Make sure that the burner has, on installation, been firmly secured to
the appliance, so that the flame is generated inside the appliance fire-
box.
Before the burner is started and, thereafter, at least once a year, have
qualified personnel perform the following operations:
a set the burner fuel flow rate depending on the heat input of the
appliance;
b set the flow rate of the combustion-supporting air to obtain a combu-
stion efficiency level at least equal to the lower level required by the
regulations in force;
c check the unit operation for proper combustion, to avoid any harmful
or polluting unburnt gases in excess of the limits permitted by the
regulations in force;
d make sure that control and safety devices are operating properly;
e make sure that exhaust ducts intended to discharge the products of
combustion are operating properly;
f on completion of setting and adjustment operations, make sure that
all mechanical locking devices of controls have been duly tightened;
g make sure that a copy of the burner use and maintenance instruc-
tions is available in the boiler room.
In case of a burner shut-down, reser the control box by means of the
RESET pushbutton. If a second shut-down takes place, call the Tech-
nical Service, without trying to RESET further.
The unit shall be operated and serviced by qualified personnel only, in
compliance with the regulations in force.
GENERAL INSTRUCTIONS DEPENDING ON FUEL USED
ELECTRICAL CONNECTION
For safety reasons the unit must be efficiently earthed and installed as
required by current safety regulations.
It is vital that all saftey requirements are met. In case of any doubt, ask
for an accurate inspection of electrics by qualified personnel, since the
manufacturer cannot be held liable for damages that may be caused
by failure to correctly earth the equipment.
Qualified personnel must inspect the system to make sure that it is
adequate to take the maximum power used by the equipment shown
on the equipment rating plate. In particular, make sure that the system
cable cross section is adequate for the power absorbed by the unit.
No adaptors, multiple outlet sockets and/or extension cables are per-
mitted to connect the unit to the electric mains.
An omnipolar switch shall be provided for connection to mains, as
required by the current safety regulations.
The use of any power-operated component implies observance of a
few basic rules, for example:
- do not touch the unit with wet or damp parts of the body and/or with
bare feet;
- do not pull electric cables;
- do not leave the equipment exposed to weather (rain, sun, etc.)
unless expressly required to do so;
- do not allow children or inexperienced persons to use equipment;
The unit input cable shall not be replaced by the user. In case of
damage to the cable, switch off the unit and contact qualified person-
nel to replace.
When the unit is out of use for some time the electric switch supplying all
the power-driven components in the system (i.e. pumps, burner, etc.)
should be switched off.
FIRING WITH GAS, LIGHT OIL OR OTHER FUELS GENERAL
General Warnings
The burner shall be installed by qualified personnel and in compliance
with regulations and provisions in force; wrong installation can cause
injuries to people and animals, or damage to property, for which the
manufacturer cannot be held liable.
Before installation, it is recommended that all the fuel supply system
pipes be carefully cleaned inside, to remove foreign matter that might
impair the burner operation.
Before the burner is commissioned, qualified personnel should inspect
the following:
a the fuel supply system, for proper sealing;
b the fuel flow rate, to make sure that it has been set based on the
firing rate required of the burner;
c the burner firing system, to make sure that it is supplied for the desi-
gned fuel type;
d the fuel supply pressure, to make sure that it is included in the range
shown on the rating plate;
e the fuel supply system, to make sure that the system dimensions are
adequate to the burner firing rate, and that the system is equipped
with all the safety and control devices required by the regulations in
force.
When the burner is to remain idle for some time, the fuel supply tap or
taps should be closed.
Special instructions for using gas
Have qualified personnel inspect the installation to ensure that:
a the gas delivery line and train are in compliance with the regulations
and provisions in force;
b all gas connections are tight;
c the boiler room ventilation openings are such that they ensure the air
supply flow required by the current regulations, and in any case are
sufficient for proper combustion.
Do not use gas pipes to earth electrical equipment.
Never leave the burner connected when not in use. Always shut the
gas valve off.
In case of prolonged absence of the user, the main gas delivery valve
to the burner should be shut off.

4
BURER DATA PLATE
Precautions if you can smell gas
a do not operate electric switches, the telephone, or any other item
likely to generate sparks;
b immediately open doors and windows to create an air flow to purge
the room;
c close the gas valves;
d contact qualified personnel.
Do not obstruct the ventilation openings of the room where gas
appliances are installed, to avoid dangerous conditions such as the
development of toxic or explosive mixtures.
Using oil pressure gauges
Generally, pressure gauges are equipped with a manual valve. Open the
valve only to take the reading and close it immediately afterwards.
SYMBOLS USED
BURNER SAFETY
The burners- and the configurations described below - comply with the
regulations in force regarding health, safety and the environment. For
more in-depth information, refer to the declarations of conformity that are
an integral part of this Manual.
.
Safety and prevention
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.
DIRECTIVES AND STANDARDS
Gas burners
European directives
2016/426/UE (appliances burning gaseous fuels)
2014/35/UE (Low Tension Directive)
2014/30/UE (Electromagnetic compatibility Directive)
2006/42/CE (Machinery Directive)
Harmonized standards
UNI EN 676 (Automatic forced draught burners for gaseous fuels)
EN 55014-1 (Electromagnetic compatibility- Requirements for house
hold appliances, electric tools and similar apparatus)
EN 60204-1:2006 (Safety of machinery – Electrical equipment of machi-
nes.)
CEI EN 60335-1 (Specification for safety of household and similar elec-
trical appliances);
CEI EN 60335-2-102 (Household and similar electrical appliances.
Safety. Particular requirements for gas, oil and solid-fuel burning
appliances having electrical connections).
UNI EN ISO 12100:2010 (Safety of machinery - General principles for
design - Risk assessment and risk reduction);
For the following information, please refer to
the data plate:
-Burner type and burner model: must be
reported in any communication with the
supplier
- Burner ID (serial number): must be reported
in any communication with the supplier
- Date of production (year and month)
- Information about fuel type and network
pressure
Consump
WARNING
Failure to observe the warning may result
in irreparable damage to the unit or
damage to the environment
DANGER! Failure to observe the warning may result
in serious injuries or death.
WARNING Failure to observe the warning may result
in electric shock with lethal consequences.
DANGER! Incorrect motor rotation can seriously damage
property and injure people.
Type --
Model --
Year --
S.Number --
Output --
Oil Flow --
Fuel --
Category --
Gas Pressure --
Viscosity --
El.Supply --
El.Consump. --
Fan Motor --
Protection --
Drwaing n° --
P.I.N. --
.Do not touch any mechanical moving parts with your hands
or any other part of your body. Injury hazard
Do not touch any parts containing fuel (i.e. tank and pipes).
Scalding hazard
Do not use the burner in situations other than the ones provi-
ded for in the data plate.
Do not use fuels other than the ones stated.
Do not use the burner in potentially explosive environments.
Do not remove or by-pass any machine safety devices.
Do not remove any protection devices or open the burner or
any other component while the burner is running.
Do not disconnect any part of the burner or its components
while the burner is running.
Untrained staff must not modify any linkages.
- After any maintenance, it is important to restore the protec-
tion devices before restarting the machine.
- All safety devices must be kept in perfect working order.
- Personnel authorized to maintain the machine must always
be provided with suitable protections.
ATTENTION: while running, the parts of the burner near the
generator (coupling flange) are subject to overheating.
Where necessary, avoid any contact risks by wearing suita-
ble PPE.
Industrial burners
European directives
2006/42/CE (Machinery Directive)
2014/35/UE (Low Tension Directive)
2014/30/UE (Electromagnetic compatibility Directive)
2006/42/CE (Machinery Directive)
Harmonized standards
EN 746-2 (Industrial thermoprocessing equipment - Part 2: Safety requi-
rements for combustion and fuel handling systems)
EN 55014-1 (Electromagnetic compatibility- Requirements for house
hold appliances, electric tools and similar apparatus)
EN 60204-1:2006 (Safety of machinery – Electrical equipment of machi-
nes.)
CEI EN 60335-1 (Specification for safety of household and similar elec-
trical appliances);
UNI EN ISO 12100:2010 (Safety of machinery - General principles for
design - Risk assessment and risk reduction);

PART I: SPECIFICATIONS
5
Gas operation: From the supply line the gas fuel passes through the gas train (filter, safety valves, gas pressure regulator and butterfly valve). The pressure
regulator sets the gas pressure within the combustion head utilization limits. Air is supplied by a fan, which may be onboard or separated depending on burner
configuration, and is channeled through an air damper.
The air damper and the gas butterfly valve are actuated by servomotors according to load curves, in order to achieve the correct proportion between fuel and air
flows, and to optimize flue gas parameters.
The adjustable combustion head can improve the burner performance by controlling the flame geometry and combustion efficiency.
Fuel and air are routed through separated channels inside the combustion head, then mixed to ignite the flame inside the combustion chamber. The ignition spark is
provided by electrodes and a high voltage transformer (a pilot flame may also be employed, depending on burner configuration).
Pre-ventilation of the combustion chamber is usually implemented according to gas directives.
The control panel, onboard or separated, allows the operator to monitor each operating phase.
Gas categories and countries of application
(*) Premix type ...N burners are not enabled to work with these gas categories.
The above gas groups can be combined according to the standard EN437:2021 and national situation of countries.
Fuel
Countries Group
AL, AT, BE, BG, CH, CY, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU,
IE, IS, IT, LT, LU, LV, MK, MT, NO, NL, PL, PT, RO, SE, SI, SK, TR
HL(*)
E2R(*)
EK (*) Er (*)
LL (*) E (R)
DANGER! The burner must be used only with the fuel specified in the burner data
plate.
PART I: SPECIFICATIONS
Note: the figure is indicative only
1 Control panel with startup switch
2 Combustion head adjusting ring nut
3 Electrical panel
4 Cover
5 Blast tube + Combustion head
6 Flange
7 Actuator
8Silencer
9 Gas train
10 Fan motor
11 Air pressure switch
11
7
8
7
6
5
4
3
2
1
9
Type --
Model --
Year --
S.Number --
Output --
Oil Flow --
Fuel --
Category --
Gas Pressure --
Viscosity --
El.Supply --
El.Consump. --

PART I: SPECIFICATIONS
6
Burner model identification
Burners are identified by burner type and model. Burner model identification is described as follows.
Technical Specifications
(*) NOTE ON THE BURNER WORKING SERVICE: LMV2x automatically stops after 24h of continuous working. The device immedia-
telystarts up, automatically. LMV3x performs countinuous operation (with electrode only).
Type G380A Model A. 1. 50. ES.
(1)
M-. MD. L-. *.
(2) (3) (4) (5) (6) (7) (8) (9)
1 BURNER TYPE G258A, G335A, G380A, G400A
2FUEL M - Natural gas, L - LPG
3 OPERATION (Available versions) MD - Fully modulating
4 BLAST TUBE SR = Standard blast tube + ABS polymer (silenced) air intake
L-= Extended blast tube
5 DESTINATION COUNTRY * - see data plate
6 BURNER VERSION A - Standard, Y - Special
7EQUIPMENT
0 = 2 gas valves
1 = 2 gas valves + gas proving system
7 = 2 gas valves + maximum gas pressure switch
8 = 2 gas valves + gas proving system + maximum gas pressure switch
8GAS CONNECTION 50 = Rp2 65 = DN65
80 = DN80 100 = DN100
9 MICRO-PROCESSOR CONTROL
ES = with no O2 trim control, with no VSD control
EO = with O2trim control, with no VSD control
EI = with no O2trim control, with VSD control
EK = with O2trim control, with VSD control
BURNER TYPE G258A
M-..
G335A
M-..
G380A
M-..
G400A
M-..
G258A
L-..
G335A
L-..
G380A
L-..
G400A
L-..
Output min. - max. kW 165 - 2580 280 - 3350 295 - 3800 580 - 4000 165 - 2580 280 - 3350 295 - 3800 580 - 4000
Fuel Natural gas L - LPG
Category (see next paragraph)
Gas rate- Natural gas min.- max. (Stm3/h) 17,5 - 273 30 - 354 31 - 402 61 - 402 - - - -
Gas rate- LPG min.- max. (Stm3/h) - - - - 6,2 - 96 10,5 - 125 11 - 142 22 - 149
Gas pressure mbar (see Note 2)I3B/P
Power supply triphase 220 V/ 230 V 3~ / 380 V/ 400 V 3N ~ 50 Hz
Auxiliary Power supply 220 V/ 230 V 2~ / 220 V / 230 V 1N ~ 50 Hz
Total power consumption kW 4,5 6 8 4,5 6 8
Electric motor kW 4,0 5,5 7,5 4,0 5,5 7,5
Protection IP40
Operation Progressive - Fully modulating
Operating temperature °C -10 ÷ +50
Storage Temperature °C -20 ÷ +60
Working service Intermitent
Note1: All gas flow rates are referred to Stm3 / h (1.013 mbar absolute pressure, 15 °C temperature) and are valid for G20 gas
(net calorific value Hi = 34,02 MJ / Stm3); for L.P.G. (net calorific value Hi = 93,5 MJ / Stm3)
Note2: Maximum gas pressure = 360 mbar (with Dungs MBDLE)
= 500 mbar (with Siemens VGD or Dungs MultiBloc MBE)
Minimum gas pressure = see gas curves.
Note3: Burners are suitable only for indoor operation with a maximum relative humidity of 80 %
Note4: with electrode: for safety reasons the burner must stop automatically every 24 hours

PART I: SPECIFICATIONS
7
Fuel
The burner technical specifications, described in this manual, refer to natural gas (calorific net value Hi = 9,45 kWh/Stm3, density ρ=
0,717 Kg/Stm3). For different fuel such as LPG, town gas and biogas, multiply the values of flow and pressure by th corrective factors
shown in the table below.
For example, to obtain the flow and pressure values for the biogas:
Fuel Hi (KWh/Stm3)ρ (kg/Stm3)fQfp
LPG 26,79 2,151 0,353 0,4
Town gas 4,88 0,6023 1,936 3,3
Biogas 6,395 1,1472 1,478 3,5
ATTENTION! The combustion head type and the settings depend on the fuel. The burner must be used only for its
intended purpose specified in the burner data plate .
ATTENTION! The corrective factors in the above table depend on the gas composition, so on the calorifc value
and the density of the gas. The above value can be taken only as reference.
Qbiogas QnaturalGas 1 478=
pbiogas pnaturalGas 35=

PART I: SPECIFICATIONS
8
Overall dimensions (mm)
BS = standard blast tube BL = long blast tube DN = gas valves size
B*: SPECIAL blast tube lengths must be agreed with Cib Unigas
TIPO DN A
(AS) AA AD AN AP B (BS) BB C CC DEFGHJ K L M N O min
O
max P Q R S U V W Y Z
G258A
50
1340
181 35
550 100
460
391 880
509
1116 725
391
254
347
450
380 518 M12 453 300 340 320
533
148
384 624 190
708
210
190
65 564 117 1362 971
447
636 487 845 292
80 579 132 1393 1002 687 538 875 310
100 592 145 1476 1085 791 642 942 353
G335A
50
1456
550 100
399
996
1139 725
414
450 533 384 624 190
65 564 117 1385 971
447
636 487 845 292
80 579 132 1416 1002 687 538 875 310
100 592 145 1499 1085 791 642 942 353
G380A
50
1483
550 100
487
1139 725
265
450 533 384 624 190
228
65 564 117 1385 971
447
636 487 845 292
80 579 132 1416 1002 687 538 875 310
100 592 145 1499 1085 791 642 942 353
G440A
50
1496
550 100
500 471
1139 725
304
450 533 384 624 190
65 564 117 1385 971
447
636 487 845 292
80 579 132 1416 1002 687 538 875 310
100 592 145 1499 1085 791 642 942 353
ØH
P
P
N
12M
D
A (AS - AL )
B (BS - BL )
AA
R
Q
S
V
APJ
AN
AD
C
O max
O min
Omax
Omin
K
K
W
CC
E
U
BB
F
LZ
ØY
ØG
boiler recommended drilling
template
burner flange

PART I: SPECIFICATIONS
9
GAS TRAIN CONNECTION
The following diagrams show some examples of possible gas trains with the components supplied with the burner and those fitted by
the installer. The gas trains and the connection of the burner to the fuel supply line must be done in accordance with current local regu-
lations.
ATTENTION: Before executing the connections to the gas pipe network, be sure that the manual cutoff valves are closed.
PSPSH PSL
PSLPSH PS
M
M
MB-DLE
VGD
MBE
gas inlet
gas inlet
gas inlet
Legend:
1 Filter
2 Low pressure switch - PGMIN
3 Safety valve
4 Proving system pressure switch - PGCP (*optional)
5 High pressure switch PGMAX: mandatory for MBE, optional
for VGD and DMV-DLE
6 Butterfly valve
7 Upstream manual valve
8 Main burner
9 Antivibration joint (*optional)
12 MBE pressure sensor
with valves
with valves
with valves

PART I: SPECIFICATIONS
10
How to read the burner “Performance curve”
To check if the burner is suitable for the boiler to which it must be install-
led, the following parameters are needed:
furnace input, in kW or kcal/h (kW = kcal/h/860);
backpressure (data are available on the boiler ID plate or in the
user’s manual).
Example:
Furnace input: 600kW
Backpressure: 4 mbar
In the “Performance curve” diagram, draw a vertical line matching the fur-
nace input value and an horizontal line matching the backpressure value.
The burner is suitable if the intersection point A is inside the performance
curve.
Data are referred to standard conditions: atmospheric pressure at 1013
mbar, ambient temperature at 15° C.
Checking the proper gas train size
Performance Curves
To get the input in kcal/h, multiply value in kW by 860.
Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15° C
NOTE: The performance curve is a diagram that represents the burner performance in the type approval phase or in the laboratory tests, but does not
To check the proper gas train size, it is necessary to the available gas pres-
sure value upstream the burner’s gas valve. Then subtract the backpressure.
The result is called pgas. Draw a vertical line matching the furnace input
value (600kW, in the example), quoted on the x-axis, as far as intercepitng
the network pressure curve, according to the installed gas train (DN65, in the
example). From the interception point, draw an horizontal line as far as
matching, on the y-axis, the value of pressure necessary to get the reque-
sted furnace input. This value must be lower or equal to the pgas value, cal-
culated before.
PRESSURE IN
COMBUSTION CHAMBER (mbar)
G258A M-
kW
G335A M-
kW
PRESSURE IN
COMBUSTION CHAMBER (mbar)
G380A M-
kW
G400A M-
kW
Campo di lavoro bruciatori
Tipo P60 Mod. M-xx.x.IT.A.0.50 - M-.xx.x.IT.A.0.65
-1
0
1
2
3
4
5
6
7
8
100 200 300 400 500 600 700 800 900
Potenza k W
Contropressione in camera di
combustione mbar
A
backpressure in
combustion chamber (mbar)
Power kW
0
5
10
15
20
25
100 200 300 400 500 600 700 800 900
Potenza / Output (kW)
Minima pressione gas in
rete / Minimum inlet gas
pressure (mbar)
Rp 2" (50)
DN65
Power kW
minimum gas pressure in
the network mbar
DN65

PART I: SPECIFICATIONS
11
represent the regulation range of the machine. On this diagram the maximum output point is usually reached by adjsuting the combustion head to its
“MAX” position (see paragraph “Adjusting the combustion head”); the minimum output point is reached setting the combustion head to its “MIN” position.
During the first ignition, the combustion head is set in order to find a compromise between the burner output and the generator specifications, that is why
the minimum output may be different from the Performance curve minimum
Pressure in the Network / gas flow rate curvesPerformance Curves
GAS PRESSURE mbar
G258A M-
Stm3/h
G335A M-
Stm3/h
GAS PRESSURE mbar
G380A M-
Stm3/h
G400A M-
Stm3/h
ATTENTION: the gas rate value is quoted on the x-axis, the related network pressure is quoted on the y-axis
(pressure value in the combustion chamber is not included). To know the minimum pressure at the gas train inlet,
necessary to get the requested gas rate, add the pressure value in the combustion chamber to the value read on
the y-axis.
The values in the diagrams refer to natural gas with a calorific value of 8125 kcal/Stm3 (15°C, 1013 mbar) and a density of
0.714 kg/Stm3 .
The values in the diagrams refer to GPL with a calorific value of 22300 kcal/Stm3(15°C, 1013 mbar) and a density of 2.14 kg/
Stm3. When the calorific value and the density change, the pressure values should be adjusted accordingly.
Where: Natural gas pressure shown in diagram
Real gas pressure
Natural gas flow rate shown in diagram
Real gas flow rate
Natural gas density shown in diagram
Real gas density

PART I: SPECIFICATIONS
12
Combustion head gas pressure curves
Combustion head gas pressure depends on gas flow and combustion chamber backpressure. When backpressure is subtracted, it
depends only on gas flow, provided combustion is properly adjusted, flue gases residual O2 percentage complies with “Recommended
combustion values” table and CO in the standard limits). During this stage, the combustion head, the gas butterfly valve and the
actuator are at the maximum opening. Refer to , showing the correct way to measure the gas pressure, considering the values of
pressure in combustion chamber, surveyed by means of the pressure gauge or taken from the boiler’s Technical specifications..
Measuring gas pressure in the combustion head
In order to measure the pressure in the combustion head, insert the pressure gauge probes: one into the combustion chamber’s pres-
sure outlet to get the pressure in the combustion chamber and the other one into the butterfly valve’s pressure outlet of the burner. On
the basis of the measured differential pressure, it is possible to get the maximum flow rate: in the pressure - rate curves (showed on the
next paragraph), it is easy to find out the burner’s output in Stm3/h (quoted on the x axis) from the pressure measured in the combu-
stion head (quoted on the y axis). The data obtained must be considered when adjusting the gas flow rate.
Gas pressure burner head vs natural gas flow rate
Curves are referred to pressure = 0 mbar in the combustion chamber!
Gas pressure in
combustion head
G258A M-
Stm3/h
G335A M-
Stm3/h
Gas pressure in
combustion head
G380A M-
Stm3/h
G400A M-
Stm3/h
1
2
4
3
Note: the figure is indicative only.Key
1 Generator
2 Pressure outlet on the combustion chamber
3 Gas pressure outlet on the butterfly valve
4 Differential pressure gauge
Fig. 4
ATTENTION: the burned gas rate must be read at the
gas flow meter. when it is not possible, the user can
refers to the pressure-rate curves as general information
only.

PART II: INSTALLATION
13
MOUNTING AND CONNECTING THE BURNER
Transport and storage
If the product must be stored, avoid humid and corrosive places. Observe the temperatures stated in the burner data table at the begin-
ning of this manual. The packages containing the burners must be locked inside the means of transport in such a way as to guarantee
the absence of dangerous movements and avoid any possible damage.
In case of storage, the burners must be stored inside their packaging, in storerooms protected from the weather. Avoid humid or corro-
sive places and respect the temperatures indicated in the burner data table at the beginning of this manual.
Handling the burner
The burner is mounted on a support provided for handling the burner by means of a fork lift truck: the forks must be inserted into the A
anb B ways. Remove the stirrup only once the burner is installed to the boiler.
Packing
The burners are despatched in wooden crates whose dimensions are:
 G series: 1600mm x 1180mm x 860mm (L x P x H)
Such packages fear moisture and are not suitable for stacking.Packing cases of this type are
affected by humidity and are not suitable for stacking.
The following are placed in each packing case:These packagings are damaged by moisture
and the maximum number of overlapping packagings indicated on the outside of the packa-
ging may not be exceeded.
burner with detached gas train;
gasket or ceramic fibre plait (according to burner type) to be inserted between the burner
and the boiler;
envelope containing this manual and other documents.
To get rid of the burner’s packing, follow the procedures laid down by current laws on disposal
of materials.
WARNING! The handling operations must be carried out by specialised and trained personnel. If these
operations are not carried out correctly, the residual risk for the burner to overturn and fall down still
persists. To move the burner, use means suitable to support its weight (see paragraph “Technical spec-
ifications”).
The unpacked burner must be lifted and moved only by means of a fork lift truck.
PART II: INSTALLATION
H
PL
AB

PART II: INSTALLATION
14
Fitting the burner to the boiler
To install the burner into the boiler, proceed as follows:
1 make a hole on the closing door of the combustion chamber as described on paragraph “Overall dimensions”)
2 place the burner to the boiler: lift it up and handle it according to the procedure described on paragraph “Handling the burner”;
3 place the 4 stud bolts (5) on boiler’s door, according to the burner drilling template described on paragraph “Overall dimensions”;
4 fasten the 4 stud bolts;
5 place the gasket on the burner flange;
6 install the burner into the boiler;
7 fix the burner to the stud bolts, by means of the fixing nuts, according to the next picture.
8 After fitting the burner to the boiler, ensure that the gap between the blast tube and the refractory lining is sealed with appropriate
insulating material (ceramic fibre cord or refractory cement).
Matching the burner to the boiler
The burners described in this manual have been tested with combustion chambers that comply with EN676 regulation and whose
dimensions are described in the diagram . In case the burner must be coupled with boilers with a combustion chamber smaller in
diameter or shorter than those described in the diagram, please contact the supplier, to verify that a correct matching is possible, with
respect of the application involved. To correctly match the burner to the boiler verify the type of the blast tube . Verify the necessary
input and the pressure in combustion chamber are included in the burner performance curve; otherwise the choice of the burner must
be revised consulting the burner manufacturer. To choose the blast tube lenght follow the instructions of the boiler manufacturer. In
absence of these consider the following:
Cast-iron boilers, three pass flue boilers (with the first pass in the rear part): the blast tube must protrude no more than Dist = 100
mm into the combustion chamber. (please see the picture below)
Pressurised boilers with flame reversal: in this case the blast tube must penetrate Dm 50 ÷ 100 mm into combustion chamber in
respect to the tube bundle plate.(please see the picture below)
The length of the blast tubes does not always allow this requirement to be met, and thus it may be necessary to use a suitably- sized
spacer to move the burner backwards or to design a blast tube tha suites the utilisation (please, contact the manifacturer).
WARNING! Carefully seal the free space between blast tube and the refractory lining with ceramic fibre rope or
other suitable means.
4
1
2
345
6
7
6
Keys
1 Burner
2 Fixing nut
3 Washer
4 Sealing gasket
5 Stud bolt
7 Blast tube
Dist. = 100 mm
DM = 50 ÷ 100 mm
A
BB
A
Dist. DM
A: ceramic fibre
B: refractory wall

PART II: INSTALLATION
15
GAS TRAIN CONNECTIONS
Following the "Hydraulic Schematics" section, the figure shows the components fitted by the installer.
Procedure to install the double gas valve unit: two (2) gas flanges are required; they may be threaded or flanged depending on
size
Gas Filter (if provided)
The gas filters remove the dust particles that are present in the gas, and prevent the elements at risk (e.g.: burner valves, counters and
regulators) from becoming rapidly blocked. The filter is normally installed upstream from all the control and on-off devices.
Once the train is installed, connect the gas valves group and pressure switches plugs.
WARNING: before executing the connections to the gas pipe network, be sure that the manual cutoff valves are
closed.
ATTENTION: it is recommended to mount filter and gas valves to avoid that extraneous material drops inside the
valves, during maintenance and cleaning operation of the filters (both the filters outside the valves group and the
ones built-in the gas valves).
ATTENTION: once the gas train is mounted, the gas proving test must be performed, according to the procedure
set by laws in force.
CAUTION: The direction of gas flow must follow the arrow on the body of the components mounted on the gas
ramp (valves, filters, gaskets...).
NOTE: the bellows unit, the manual cutoff valve and the gaskets are not part of the standard supply
first step: install the flanges to prevent entry of foreign bodies in the gas line
on the gas pipe, clean the already assembled parts and then install the valve
unit check gas flow direction: it must follow the arrow on the valve body
VGD20: make sure the O-rings are correctly positioned between the flanges
and the valve
In all cases:
ensure that the gaskets are correctly positioned between the flanges;
fasten all the components with screws, according to the following diagrams:
make sure bolts on the flanges are properly tightened
check that the connections of all components are leak .
CAUTION: Use seals suitable for the gas used.
WARNING: Slowly open the fuel cock to avoid breaking the pressure
regulator.
ATTENTION: it is reccomended to install the filter with gas flow parallel to the floor in order to prevent dust fall on
the safety valve during maintenance operation.
10
11 d
9
1
3
11c
11b
11a
gas supply network
Keys
1Gasfilter
3 Gas valves group
9 Bellows unit
10 Manual valve
11 Gasket(a, b, c, d)
A
BB
A
B
B
C

PART II: INSTALLATION
16
MultiBloc MB-DLE - Assembling the gas train
Mounting
1 Mount flange onto tube lines: use appropriate sealing agent
2 Insert MB-DLE: note position of O rings
3 Remove MultiBloc between the threaded flanges
4 After installation, perform leakage and functional test
5 Disassembly in reverse order
A
B
C
D
(A)
MOUNTING POSITIONS
A B
MB-DLE 405.. 412
(B) (C) (D)
MB-DLE 415.. 420
(O-Ring)

PART II: INSTALLATION
17
DUNGS MBE
Components and position of pressure switches
PS pressure sensor connection to VD-R actuator and gas train
Pressure taps MultiBloc MBE
Attention: In the case of the MBE... valve, a pressure limit switch downstream of the safety valve is mandatory.
1 PGMIN minimum gas pressure switch
2 PGMIN minimum gas pressure switch (alternative
to 1)
3 PGCP leakage control gas pressure switch
4 PGMAX maximum gas pressure switch
5 Actuator with integrated pressure stabiliser
6 On-Off actuator
7 Valve body (Threaded)
8 Valve body (Flange)
On equipment versions Facile VD-R must
be installed upstream valve
3
5
1
2
4
6
8
VD-RVD-V
3
5
1
2
4
6
7
VD-RVD-V
min. 5 Ø
Ø
VD-R
VD-V
PS
1, 2, 3, 4 Sealing plug
G1/8 ISO 228
5Locking screw
For version VB-2L only:
connection for vent line
NPT 1
1, 2, 3, 5 Sealing plug
G1/8 ISO 228
4 G3/4 for system
accessories
6, 7 Sealing plug G1/4
ISO 228
8 For version VB…L
only: connection for
vent line
VB-2½L=1¼"NPT
VB-3L=1½"NPT
VB-4L=2"NPT
VB-5L=2"NPT

PART II: INSTALLATION
18
Siemens VGD20.. e VGD40..
Components and position of pressure switches
Connection of actuator SKP2... to gas train
Siemens SKP2.. (pressure governor)
- Connect the reference gas pipe (TP in figure; 8mm-external size pipe supplied loose), to the gas pressure nipples placed on the gas
pipe, downstream the gas valves: gas pressure must be measured at a distance that must be at least 5 times the pipe size.
- Leave the blowhole free (SA in figure). Should the spring fitted not permit satisfactory regulation, ask one of our service centres for a
suitable replacement.
- D: pressure adjustment spring seat
version with SKP2 (built-in pressure stabilizer)Siemens VGD../VRD.. SKPx5 (Auxiliary-optional micro
switch)Gas valve
If the auxiliary microswitch (POC) is required, a dedicated actuator, different from the one usually supplied, must be ordered. The con-
nection is shown in the figure.
WARNING: removing the four screws BS causes the device to be unserviceable!
3
5
2
1
4
66
8
SKP15
SKP25
SKP15
SKP25
5
2
1
3
4
7
1 PGMIN minimum gas pressure switch
2 PGMIN minimum gas pressure switch (alternative
to 1)
3 PGCP leakage control gas pressure switch
4 PGMAX maximum gas pressure switch
5 Actuator with integrated pressure stabiliser
6 On-Off actuator
7 Valve body (Threaded)
8 Valve body (Flange)
min. 5 Ø
Ø
TP
BS
SA
D
SKP2
Valve
driveAG
A64
Valve
driveAG
A65
AGA64 - Valve drivePlug connection ON-OFF
AGA65 - End of strokePlug connection POC
End of stroke (POC)
The connection plug of the POC is different from that of the ON-OFF
drive

PART II: INSTALLATION
19
Siemens VGD Pressure taps
(G 1/4") (G 1/8") (G 1/4") (G 3/4") (G 1/8") (G 1/4") (G 1/8")
Strainer
1 9 3 4 5 2 11
76 8
2V1V
10
12
4
3
9
1610
3
2
11
10
5
6
7
8
9
Legend
pi Inlet pressure
pm Pressure between valves
po Outlet pressure
Speed Sensor AGG 5.310
is a speed sensor kit used to monitor the speed of a motor. This kit is used to mount the speed sensor directly on the motor casing.

PART II: INSTALLATION
20
BURNERS WITH INVERTER VARIANT (if provided)
The manufacturer provides:
KOSTAL: on-board or wall-mounted (in the latter case the kit is required)
DANFOSS: wall-mounted
Both can be equipped with a braking resistor.
The burner terminal box is prepared to receive certain signals (for connection to the inverter, see the dedicated connection diagram).
The LMV51.300 / LMV52.xxx, HAGC31-CU01 e LMV37.400/LMV26.300 electronic cam burners with fan motor driven by inverter in
addition to the air and fuel adjustment curves also have a fan motor speed adjustment curve.
Generally the curve of the inverter goes from 50% to 100% of the engine revolutions. This, in addition to improving the setting of the
burner also allows a saving on the consumption of the fan engine.
Terminal interface with Inverter
The procedures of installation fo the gas valves are showed in the next paragraphs, according to the gas train used:
Input signals for the inverter depending on the equipment:
LMV51.300 / LMV52.xxx 4÷20mA
HAGC31-CU01 4÷20mA
LMV37.400 / LMV26.300 0÷10V
DANFOSS FC101
DANFOSS FC102
INVEOR M
LMV5 LMV2x/3x
- HAGC31-CU01
Braking resistances possibility of use only for FC102
possibility of use
only for INVEOR