CIB UNIGAS C92A Operating manual

M039471CD Rel. 0,3 03/2023
BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES - ГОРЕЛКИ
LMV2x
Microprocessor-controlled
Gas - light oil burners
MANUAL OF INSTALLATION - USE - MAINTENANCE
C92A - C120A

2
DANGERS, WARNINGS AND NOTES OF CAUTION
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.
1) 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 cut-
out 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,
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
damages resulting from improper installation, use and failure to comply
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
2) SPECIAL INSTRUCTIONS FOR BURNERS
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 shut-off
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 regula-
tions 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 instructions
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.
3) GENERAL INSTRUCTIONS DEPENDING ON FUEL USED
3a) 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 quali-
fied personnel 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.

3
3b) FIRING WITH GAS, LIGHT OIL OR OTHER FUELS
GENERAL
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 desig-
ned 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.
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.
DIRECTIVES AND STANDARDS
Gas burners
European directives
-Regulation 2016/426/UE (appliances burning gaseous fuels)
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (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
machines.)
-CEI EN 60335-1 (Specification for safety of household and similar
electrical 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);
Light oil burners
European directives
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (Machinery Directive)
Harmonized standards
-UNI EN 267-2011(Automatic forced draught burners for liquid 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
machines.)
-CEI EN 60335-1 (Specification for safety of household and similar
electrical 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);
Heavy oil burners
European Directives
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (Machinery Directive)
Harmonized standards
-UNI EN 267(Automatic forced draught burners for liquid 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
machines.)
-CEI EN 60335-1 (Specification for safety of household and similar
electrical 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);

4
Gas - Light oil burners
European Directives
-Regulation 2016/426/UE (appliances burning gaseous fuels)
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (Machinery Directive)
Harmonized standards
-UNI EN 676 (Automatic forced draught burners for gaseous fuels)
-UNI EN 267(Automatic forced draught burners for liquid 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
machines.)
-CEI EN 60335-1 (Specification for safety of household and similar
electrical 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);
Gas - Heavy oil burners
European directives:
-Regulation 2016/426/UE (appliances burning gaseous fuels)
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (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 electri-
cal 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);
Industrial burners
European directives
-Regulation 2016/426/UE (appliances burning gaseous fuels)
-2014/35/UE (Low Tension Directive)
-2014/30/UE (Electromagnetic compatibility Directive)
-2006/42/EC (Machinery Directive)
Harmonized standards
-EN 55014-1 (Electromagnetic compatibility- Requirements for house
hold appliances, electric tools and similar apparatus)
-EN 746-2 (Industrial thermoprocessing equipment - Part 2: Safety requi-
rements for combustion and fuel handling systems)
-UNI EN ISO 12100:2010 (Safety of machinery - General principles for
design - Risk assessment and risk reduction);
-EN 60204-1:2006 (Safety of machinery – Electrical equipment of machi-
nes.)
-EN 60335-2 (Electrical equipment of non-electric appliances for house-
hold and similar purposes. Safety requirements)
Burner data plate
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 repor-
ted in any communication with the supplier
date of production (year and month)
information about fuel type and network
pressure
SYMBOLS USED
Figures, illustrations and images used in this manual may differ in appearance from
the actual product.
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 consequen-
ces
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. --
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.
Residual risks deriving from misuse and prohibitions
The burner has been built in order to make its operation safe; there are,
however, residual risks.
DANGER! Incorrect motor rotation can seriously
damage property and injure people.
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 pro-
vided for in the data plate.
Do not use fuels other than the ones stated.
Do not use the burner in potentially explosive environ-
ments.
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 sui-
table PPE.

PART I: SPECIFICATIONS
5
BURNERS FEATURES
Gas operation: the gas coming from the supply line, passes through the valves group provided with filter and governor. This one for-
ces the pressure in the utilisation limits. The actuators move proportionally the air damper and the gas butterfly valve, in order to
achieve the optimisation of the gas flue values, as to get an efficient combustion.
Light oil operation: the fuel coming from the supply line, is pushed by the pump to the nozzle and then into the combustion chamber,
where the mixture between fuel and air takes place and consequently the flame.
In the burners, the mixture bertween fuel and air, to perform clean and efficient combustion, is activated by atomisation of oil into very
small particles. This process is achieved making pressurised oil passing through the nozzle.
The pump main function is to transfer oil from the tank to the nozzle in the desired quantity and pressure. To adjust this pressure,
pumps are provided with a pressure regulator (except for some models for which a separate regulating valve is provided). Other pumps
are provided with two pressure regulators: one for the high and one for low pressure (in double-stage systems with one nozzle).
The adjustable combustion head can improve the burner performance. The combustion head determines the energetic quality and the
geometry of the flame. Fuel and comburent are routed into separated ways as far as the zone of flame generation (combustion cham-
ber). The control panel, placed on the burner front side, shows each operating stage.
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.
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)
PART I: SPECIFICATIONS
5
4
3
2
1
9
9
6
8
Note: the figure is indicative only.
1 Control panel with startup switch
2 Gas valves group
3 Electrical panel
4 Flange
5 Blast tube - Combustion head
6Pump
7 Pump Motor
8 Air pressure switch
9 Actuator
7

PART I: SPECIFICATIONS
6
Burner model identification
Burners are identified by burner type and model. Burner model identification is described as follows.
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:
Type C120A Model MG. MD. SP. *. A. 1. 80. EC.
(1) (2) (3) (4) (5) (6) (7) (8) (9)
1 BURNER TYPE C92A - C120A
2FUEL
MG - Natural gas-Light oil
BG - Biogas-Light oil
LG - LPG-Light oil
3 OPERATION (Available versions) PR - Progressive, MD - Fully modulating
4BLAST TUBE AND AIR INLET CONFIGURATION SP = Standard blast tube + aluminium air intake
LP = Extended blast tube + aluminium air intake
5 DESTINATION COUNTRY * - see data plate
6 BURNER VERSION A - Standard, Y - Special
7 EQUIPMENT
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
8 GAS CONNECTION see Specifications 32 = Rp11/4 , 40 = Rp11/2 ,50 = Rp2, 65 = DN65, 80 = DN80
9 MICRO-PROCESSOR CONTROL EC = micro-processor control, without inverter
ED = micro-processor control, with inverter
WARNING! The burner must be used only with the fuel specified in the burner data
plate .
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.
Type --
Model --
Year --
S.Number --
Output --
Oil Flow --
Fuel --
Category --
Gas Pressure --
Viscosity --
El.Supply --
El.Consump. --
Qbiogas QnaturalGas 1 478=
pbiogas pnaturalGas 35=

PART I: SPECIFICATIONS
7
(*) 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).
BURNER TYPE C92A MG.. C120A MG.. C92A LG.. C120A LG.. C92A BG.. C120A BG..
Output min. - max. kW 250 - 920 300 - 1200 250 - 920 300 - 1200 250 - 920 300 - 1200
Fuel Nat. gas - Light oil LG - LPG-Light oil BG - Biogas-Light oil
Gas flow rate min.-max. Stm3/h 26 - 97 32 - 127 - - - -
Gas flow rate min.-max. Stm3/h - - 9,3 - 34 11,2 - 45 - -
LPG flow rate min.-max. Stm3/h ----39-14447-188
Biogas pressure min.-max. mbar (see Note 2)
Electric supply 230V 3~ / 400V 3N ~ 50Hz
Light oil rate min. - max. kg/h 21 - 78 25 - 101
Light Oil viscosity cSt @ 40 °C 2 - 7.4
Light Oil density kg/m3840
Total power consumption kW 2,15 2,55 2,15 2,55 2,15 2,55
Fan motor kW 1,1 1,5 1,1 1,5 1,1 1,5
Pump motor kW 0,55 0,55 0,55 0,55 0,55 0,55
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= 9.45 kWh / Stm3);
Note2: Maximum gas pressure = 360 mbar (with Dungs MBDLE)
Maximum gas pressure = 500 mbar (with Siemens VGD or Dungs MultiBloc MBE)
Minimum gas pressure = see gas curves.
WARNING: Burners are suitable only for indoor operation with a maximum relative humidity of 80%

PART I: SPECIFICATIONS
8
Overall dimensions (mm) C92A
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 AE AN AP
B (BS)
BBCCCDEFGH I J K L M N
Omin
Omax
P Q R SUVWY Z
C92A
1.32 1162 87 28 306 292 54 358 328 745 342 987 632 374 240 270 198 238 300 335 M10 330 216 250 233 387 131 256 541 x 490 210 155
1.4 1162 87 28 306 317 79 358 328 745 342 987 632 374 240 270 198 238 300 335 M10 330 216 250 233 458 131 327 541 x 490 210 155
1.5 1162 87 28 306 317 79 358 328 745 342 975 620 374 240 270 198 238 300 335 M10 330 216 250 233 474 131 343 526 x 490 210 155
1.6 1162 87 28 306 236 118 358 328 745 342 1074 719 374 240 270 198 238 300 335 M10 330 216 250 233 563 131 432 593 292 490 210 155
B (BS/BL)
AA
CC
BB
FC
U
E
D
AD
Q
Z
L
W
K
K
H
P
M
Omax
Omin
P
N
RS
A (AS/AL)
G
Y
J
AC
AE
O min
O max
I
BOILER RECOM-
MENDED DRILLING
BURNER FLANGE
V**
S
(**) According to the gas train size and the burner type, MB-DLE or VGD valves are supplied. The "V" measure, refers to the gas filter, for burners provided with
Siemens VGD valves. MB-DLE valves have a built-in filter.

PART I: SPECIFICATIONS
9
Overall dimensions (mm) C120A
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 AE AF AG AN AP
B (BS)
BB C CC DEFGH I J K L M N
Omin
Omax
PPP QQQ RSUVWY Z
C120A
1.32 1335 87 28 306 233 280 292 54 500 328 745 342 987 632 374 300 270 198 238 300 335 M10 330 216 250 233 400 387 440 131 256 541 x 490 210 155
1.40 1335 87 28 306 233 280 317 79 500 328 745 342 987 632 374 300 270 198 238 300 335 M10 330 216 250 233 400 458 440 131 327 541 x 490 210 155
1.50 1335 87 28 306 233 280 317 79 500 328 745 342 975 620 374 300 270 198 238 300 335 M10 330 216 250 233 400 474 440 131 343 526 x 490 210 155
1.65 1335 87 28 306 233 280 236 118 500 328 745 342 1074 719 374 300 270 198 238 300 335 M10 330 216 250 233 400 563 440 131 432 593 292 490 210 155
B (BS/BL)
AA
CC
BB
FC
U
E
D
AD
Q
Z
L
W
RS
A (AS/AL)
J
AC
AE
I
G
Y
AG
QQ
AF=O
M
H
PP
PP
BOILER RECOMMEN-
DED DRILLING TEM-
BURNER FLANGE
V**
S
(**) According to the gas train size and the burner type, MB-DLE or VGD valves are supplied. The "V" measure, refers to the gas filter, for burners provided with
Siemens VGD valves. MB-DLE valves have a built-in filter.

PART I: SPECIFICATIONS
10
3I2MG-21 v0 Hydraulic diagram
MB-DLE
PS
PSH
PSL
24
25 23
26
PSPSH PSL
M
PS
M
M
S
PS
PI
PI
12
3
6
50
4
20
52
53
18
16
12
15
19
19 10
54
VGD
44
47 41 40
42
45 4346
M51
M48
13
14
S
6
oil inlet
oil outlet
gas inlet
combustion air
BY BURNER CONSTRUCTOR
BY OTHERS
According to the gas train size and the burner type, MB-DLE
safety valves are supplied. In this case, the item 42 is inte-
grated in the valves. See the following drawing.
POS OIL TRAIN
1 Filter
2 Flexible hose
3 Pump and pressure governor
4 Electrical motor
6 Solenoid valve
6.1 Solenoid valve
10 Oil distributor
12 Pressure gauge
13 Pressure governor
14 Electrical motor
15 Pressure switch
16 One-way valve
18 Flexible hose
19 Manual valve
20 Pressure gauge
MAIN GAS TRAIN
23 Pressure switch - PGMIN
24 Safety valve with built in gas governor
25 Proving system pressure switch - PGCP
26 Pressure switch - PGMAX
40 Manual valve
41 Bellows unit
42 Filter
43 Pressure switch - PGMIN
44 Safety valve with built in gas governor
45 Proving system pressure switch - PGCP
46 Pressure switch - PGMAX
47 Butterfly valve
48 Actuator
COMBUSTION AIR TRAIN
50 Air damper
51 Actuator
52 Pressure switch - PA
53 Draught fan with electromotor
54 Burner
NOTE The following POS are optional
19, 20, 40, 41, 45, 46

PART I: SPECIFICATIONS
11
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
12
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.
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
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
BACK PRESSURE IN
COMBUSTION CHAMBER mbar
C92A M-
kW
C120A M-
kW
BACK PRESSURE IN
COMBUSTION CHAMBER mbar
C120A L-
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
Pote nza k W
Contropressione in camera di
combustione mbar
A
backpressure in
combustion chamber (mbar)
Power kW

PART I: SPECIFICATIONS
13
Checking the proper gas train size
Pressure in the Network / gas flow rate curves
Natural Gas burners
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.
GAS PRESSURE IN
THE NETWORK mbar
C92A M-..
Stm3/h
C120A M-..
Stm3/h
GAS PRESSURE IN
THE NETWORK mbar
C120A L-..
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.
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
14

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
Combustion head gas pressure curves
Combustion head gas pressure depends on gas flow and combustion chamber backpressure. When backpressure is subtracted, i
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 o
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
pressure 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
combustion head (quoted on the y axis). The data obtained must be considered when adjusting the gas flow rate.
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. 1
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 I: SPECIFICATIONS
15
Pressure - rate in combustion head curves
Curves are referred to pressure = 0mbar in the combustion chamber!
Gas pressure in
combustion head
C92A M-..
Stm3/h
C120A M-..
Stm3/h
Gas pressure in
combustion head
C120A L-..
Stm3/h

PART II: INSTALLATION
16
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 designed to work positioned according to the picture below. For different installations, please contact the Manufacture.
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
Packing
The burners are despatched in wooden crates whose dimensions are:
1280mm x 835mm x 620mm (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 specifications”).
PART II: INSTALLATION
H
PL
4
1
2
345
6
7
6
Keys
1 Burner
2 Fixing nut
3 Washer
4 Sealing gasket
5 Stud bolt
7 Blast tube

PART II: INSTALLATION
17
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.
Dist. = 100 mm
DM = 50 ÷ 100 mm
B
A
Dist. DM
A: ceramic fibre
B: refractory wall

PART II: INSTALLATION
18
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
19
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
20
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