Unigas TP90A, TP91A, TP512A, TP515A, TP520A Installation, User's, And Maintenance Manual
...
TP90A-TP91A
TP92A-TP93A
TP512A-TP515A
TP520A-TP525A
Gas burners
MANUAL OF INSTALLATION - USE - MAINTENANCE
BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES -
M039177CA Rev. 0 04/2007
ГОРЕЛКИ
M03177CA
TABLE OF CONTENTS
WARNINGS ................................................................................................................................................................ 3
PART I: INSTALLATION MANUAL ...................... .... ... ... .......................................................................................... 5
GENERAL FEATURES ...................................................................................................................................................................5
How to interpret the burner’s “Performance curve” ............................................... ... ....................................................................... 6
BURNERS SPECIFICATIONS .......................................................................................................................................................7
Technical specifications ................................................................................................................................................................7
Country and usefulness gas categories ..........................................................................................................................................8
Overall dimensions .........................................................................................................................................................................9
Performance Curves .....................................................................................................................................................................11
Pressure in the Network / gas flow rate curves ............................................................................................................................12
MOUNTING AND CONNECTING THE BURNER ........................................................................................................................13
Packing .........................................................................................................................................................................................13
Handling the burner ......................................................................................................................................................................13
Fitting the burner to the boiler .......................................................................................................................................................14
Fan installation ..............................................................................................................................................................................14
Matching the burner to the boiler .................................................................................................................................................. 15
GAS TRAIN CONNECTIONS .......................................................................................................................................................16
Assembling the gas grain ..............................................................................................................................................................17
ELECTRICAL CONNECTIONS .................................................................................................................................................... 20
Electrical wiring diagram for burners provided with printed circuit (standard configuration)..........................................................21
Electrical wiring diagram for burners with no printed circuit provided ...........................................................................................22
Rotation of fan motor ....................................................................................................................................................................22
Combustion head pressure curves depending on the gas flow rate .............................................................................................23
Measuring the gas pressure in the combustion head ...................................................................................................................23
Pressure in combustion head - gas flow rate curves .................................................................................................................24
ADJUSTING AIR AND GAS FLOW RATES .................................................................................................................................25
Gas Filter .................................................................................................................................................................................... 25
VPS504 Gas proving system ....................................................................................................................................................... 25
Servocontrol ..................................................................................................................................................................................25
Air and gas flow rate adjustements ...............................................................................................................................................26
Adjustment by the Berger STM30.. servocontrol ..........................................................................................................................28
Adjustment by the Siemens SQL33.. servocontrol .......................................................................................................................30
Calibration of air and gas pressure switches ................................................................................................................................33
Calibration of air pressure switch ..................................................................................................................................................33
Calibration of minimum gas pressure switch ................................................................................................................................33
Calibrating the maximum gas pressure switch (when provided) ...................................................................................................33
PART II: OPERATION ........................................................... .................................................................................. 34
OPERATION .................................................................................................................................................................................35
PART III: MAINTENANCE ........................ .... ... ... ..................................................................................................... 36
PERIODICAL SERVICING ...........................................................................................................................................................36
Gas filter maintenance ..................................................................................................................................................................36
Inspection and replacement of the MULTIBLOC DUNGS MBC..SE filter (Threaded valves group) ............................................ 36
Adjusting the electrodes ................................................................................................................................................................38
Replacing the electrodes ...............................................................................................................................................................38
Checking the detection current ..................................................................................................................................................... 39
Seasonal stop ............................ ...................................................................................................................................................40
Burner disposal ................................................... ..........................................................................................................................40
TROUBLESHOOTING ..................................................................................................................................................................41
WIRING DIAGRAMS ...................................................................... ..............................................................................................42
SPARE PARTS .............................................................................................................................................................................53
APPENDIX................................................................................................................................................................ 54
2
WARNINGS
THIS MANUAL IS SUPPLIED AS AN INTEGRAL AND ESSENTIAL PART OF THE PR ODUCT 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
z The equipment must be installed in compliance with the regu-
lations in force, following the manufacturer’s instructions, by
qualified personnel.
z 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.
z Improper installation may cause injury to people and animals,
or damage to property, for which the manufacturer cannot be
held liable.
z 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, faste ning devices,
plastic bags, foamed polystyrene, etc), should not be left within
the reach of children, as they may prove harmful.
z 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.
z Make sure that inlet or exhaust grilles are unobstructed.
z In case of breakdown and/or defective unit operation, discon-
nect 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.
Failure to comply with the above instructions is likely to impair the
unit’s safety.
To ensure equipment efficiency and proper operation, it is essen-
tial that maintenance operations are performed by qualified personnel at regular intervals, following the manufacturer’s
instructions.
z When a decision is made to discontinue the use of the equip-
ment, those parts likely to constitute sources of danger shall
be made harmless.
z 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.
z For all the units that have been modified or have options fit-
ted then original accessory equipment only shall be used.
z 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 othe-
rwise, for damages resulting from improper installation, use and
failure to comply with the instructions supplied by the manufacturer.
2) SPECIAL INSTRUCTIONS FOR BURNERS
z The burner should be installed in a suitable room, with ve nti-
lation openings complying with the require ments of the regulations in force, and sufficient for good combustion.
z Only burners designed according to the regulations in force
should be used.
z This burner should be employed exclusively for the use for
which it was designed.
z Before connecting the burner, make sure that th e unit rating
is the same as delivery mains (electricity, gas oil, or other
fuel).
z Observe caution with hot burner components. These are,
usually, near to the flame and the fuel pre-hea ting 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
z Make sure that the burner has, on installation, been firmly
secured to the appliance, so that the flame is generated
inside the appliance firebox.
z 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
combustion 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 pro-
perly;
e make sure that exhaust ducts intended to discharge the p ro-
ducts 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 main tenance
instructions is available in the boiler room.
z In case of repeated burner shut-downs, do not continu e re-
setting the unit manually. Contact qualified personnel to take
care of such defects.
z The unit shall be operated and serviced by qualified person-
nel only, in compliance with the regulations in force.
3
3) GENERAL INSTRUCTIONS DEPENDING ON FUEL USED
3a) ELECTRICAL CONNECTION
z For safety reasons the unit must be efficiently earthed and
installed as required by current safety regul a ti on s.
z 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.
z 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.
z No adaptors, multiple outlet sockets and/or extension cables
are permitted to connect the unit to the electric mains.
z An omnipolar switch shall be provided for connection to
mains, as required by the current safety regulations.
z The use of any power-operated component implies obser-
vance 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 equi-
pment;
z The unit input cable shall not be replaced by the user.
In case of damage to the cable, switch off the uni t and contact
qualified 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.
3b) FIRING WITH GAS, LIGHT OIL OR OTHER FUELS
GENERAL
z 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.
z 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.
z 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 designed 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 dimen-
sions 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.
z When the burner is to remain idle for some time, the fuel sup-
ply 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.
z Do not use gas pipes to earth electrical equipment.
z Never leave the burner connected when not in use. Always
shut the gas valve off.
z In case of prolonged absence of the user, the main gas deli-
very valve to the burner should be shut off.
Precautions if you can smell gas
a do not operate e lectric switches, the teleph one, 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.
z 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.
4
CIB UNIGAS - M039177CA
PART I: INSTALL ATION MANUAL
GENERAL FEATURES
This series of industrial burners is designed for all those applications that require big-sized air fans or air-flue heat exchangers to be
installed in sound-proof areas to reduce noise. They can be provided with built-in or separately-mounted control panel (console or wallmounted).
10
9
8
7
11
12
6
5
1
4
2
3
Fig. 1
1 Adjusting cam
2 Servocontrol
3 Bellows
4 Burner flange
5 Junction box
6 Combustion head adjusting screw
7 Gas filter
8 Gas proving system
9 Gas valves group
10 Cover
11 Combustion head-blast tube group
The gas coming from the supply line, passes through the valves group provided with filter and stabiliser. This one forces the pressure in
the utilisation limits. The electric servocontrol (2), that moves proportionally the air damper a nd the gas butterfly valve, uses an adjusting cam (1) with variable shape. This one allows the optimisation of the gas flue values, as to get an efficient combustion. The combustion head positioning determines the burner’s output. The combustion head (11) 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 chamber). The air
(comburent) and fuel (gas) are forced into the combustion chamber.
5
CIB UNIGAS - M039177CA
How to interpret the burner’s “Performance curve”
To check if the burner is suitable for the boiler to which it must be installled, the followin g parameters are needed:
z fuel
z furnace input, in kW or kcal/h (kW = kcal/h / 860);
z boiler type;
z combustione head type (reverse flame or three phase)’
z temperature or pressure of the thermal carrier fluid
z Comburent air temperature
z Air duct positioning
z Pressure in the combustion chamber
z Elevation (altitude) of burner installation
z Gas train (only for gas burners)
z Pumping unit (only for light-oil or heavy-oil burners)
z Air fan
z Bilt-in or separated control panel
z backpressure (data are available on the boiler’s ID plate or in the user’s manual).
Burners provided with built-in control panel are designed for IP40 inde x of protection. For other values of IP, please contact the CIB
UNIGAS Technical Dpt.
Power output diagram at 15àC air temperature
TP1050
TP1030
TP525A
TP520A
TP515A
TP512A
TP93A
TP92A
TP91A
TP90A
0 2000 4000 6000 8000 10000 12000 14000 16000
Burner performance range
z furnace input;
z air temperature
z altitude
z generator pressure or temperature
Example:
z furnace input: 9600kW
z air temperature: 15°C
z altitude: 0m
z generator pressure (only for steam generators): 12bar
Fig. 2
See the diagram in Fig. 2, as to find the burners that better suite the power range requested in the exmple (9600kW). Once the models
are founded out, the choice regards technical and economical features.
Checking the proper gas train size
To check the proper gas train size, it is necessary to the available gas pressure value upstream the burner’s gas valve. Then s ubtract
Data requested:
the backpressure. The result is called p
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-axi s, the value of pressure necessary to get the req uested furnace
input. This value must be lower or equal to the p
gas. Draw a vertical line matching the furnace input value (600kW, in the example), quoted o n
gas value, calculated before.
Tipo / Type P6 0
M-. ..50 ( Multib loc DUNGS MB- DLE 420 B01)
M-...65 (Filtro / Filter DN65+ SIEMENS VGD40.065 +SKP1x+SKP2x)
25
20
15
10
pressure (mbar)
5
rete / Minimum inlet gas
Minima pressione gas in
0
100 200 300 400 500 600 700 800 900
Potenza / Output (kW)
Rp 2" (50)
6
DN65
Fig. 3
CIB UNIGAS - M039177CA
BURNERS SPECIFICATIONS
Burner model identification
Burners are identified by burner type and mode l. Burner model ide ntification is described as follows.
Type TP90A Model M-. PR. S. *. A. 1. 80
(1) (2) (3) (4) (5) (6) (7) (8)
(1) BURNER TYPE TP90A
(2) FUEL M - Natural gas
(3) OPERATION (Available versions) PR - Progressive
MD - Fully modulating
(4) BLAST TUBE S - Standard
L - long
(5) DESTINATION COUNTRY * - see data plate
(6) BURNER VERSION A - Standard
(7) EQUIPMENT 1 = 2 valves + gas proving system
(8) GAS CONNECTION
see Specifications
50 = Rp2
80 = DN80 100 = DN100
65 = DN65
Technical specifications
Note: the Output values are referred to comburent air temperature lower than 50°C.
BURNER TYPE TP90A TP91A TP92A TP93A
Output min - max kW 320-2300 480 - 2670
Fuel
Category (see next paragraph)
3
Gas rate
Power supply
Total power consumption
Protection
Operation
Pressure (see Note 2)
Gas train 50
Gas train 65
Gas train 80 ØValves Connection 80 / DN80
Gas train 100
Operating temperature °C
Storage Temperature °C
Working service*
min.-max. (Stm
ØValves /
Connection
ØValves /
Connection
ØValves /
Connection
/h)
kW 0,5
34 - 243 51 - 283 51 - 323 58 - 434
Progressive - Fully modulating
Natural gas
230V 3~ / 400V 3N~ 50Hz
50 / Rp 2
65 / DN65
100 / DN100
-10 ÷ +50
-20 ÷ +60
Internittent
480 - 3050 550 - 4100
IP40
7
BURNER TYPE TP512A T515A T520A TP525A
Output min - max kW 600-4500 770 - 5200
Fuel
Natural gas
1000 - 6400 2000 - 9750
Category (see next paragraph)
Gas rate
Power supply
Total power consumption
Protection
Operation
3
min.-max. (Stm
/h)
kW 0,5
63.5 - 476 81.5 - 550 106 - 677 212 - 1032
230V 3~ / 400V 3N~ 50Hz
IP40
Progressive - Fully modulating
Pressure (see Note 2)
Gas train 50
Gas train 65
Gas train 80
Gas train 100
ØValves /
Connection
ØValves /
Connection
ØValves
Connection
ØValves /
Connection
Operating temperature °C
Storage Temperature °C
Working service*
50 / Rp 2
65 / DN65
80 / DN80
100 / DN100
-10 ÷ +50
-20 ÷ +60
Internittent
Note1:
all gas flow rates are referred to Stm
(nett calorific value: 34.02 MJ/Stm
3
/h (1013 mbar pressure, 15 °C temperature) and are valid for G20 natural gas
3
).
Note2: Maximum gas pressure = 500mbar (with Siemens VGD gas valves).
Minimum gas pressure = see gas curves.
*NOTE ON THE BURNER WORKING SERVICE: for safety reasons, one controlled shutdown must take place every
24 hours.
Country and usefulness gas categories
GAS CATEGORY COUNTRY
I
2H
I
2E
I
2E( R ) B
I
2L
I
2ELL
I
2Er
AT ES GR SE FI IE HU IS NO CZ DK GB IT PT
LU
BE
NL
DE
FR
Overall dimensions (mm)
COLD AIR+HOT AIR
COLD AIR ONLY
CIB UNIGAS - M039177CA
Fig. 4 Fig. 5: Bellows unit drilling plate Fig. 6Boiler’s drilling plate
9
ABCDEFGH I LM NPQY
TP90A
TP91A
TP92A
TP93A
148 490 826 606 180 510 234 264 503 425 M12 322 300 160 228
148 490 826 606 180 510 265 295 503 425 M12 322 300 160 228
148 490 826 606 180 510 269 299 503 425 M12 322 300 160 228
148 495 826 606 180 510 304 344 503 425 M12 322 300 160 228
COLD AIR+HOT AIR
COLD AIR ONLY
Fig. 7
10
Fig. 8
Fig. 9: Bellows unit drilling plate Fig. 10 - Boiler’s drilling plate
ABCDEFGH I LM NPQY
TP512A
TP515A
TP520A
TP525A
160 520 910 694 230 530 340 380 517 568 M14 335 390 160 286
160 520 910 694 230 530 380 420 517 568 M14 335 390 160 312
160 520 910 694 230 530 400 440 517 568 M14 335 390 160 328
160 520 910 694 230 530 434 474* 517 568 M14 335 390 160 328
* Fit a counterflange between burner and boiler. As an alternative, make a smaller hole H, but greather than Y and fit the blast tube from the internal side of boiler.
CIB UNIGAS - M039177CA
Performance Curves
TP515A
TP512A
TP93A
TP92A
CIB UNIGAS - M039177CA
Output diagram (air temperature = 15°C)
TP525A
TP520A
TP91A
TP90A
0 2000 4000 6000 8000 10000 12000 14000 16000
Campo di scelta br uciatore
Range for burner choosing
11
Pressure in the Network / gas flow rate curves
TP90A
70
60
50
40
30
20
10
GAS PRESSURE (mbar)
0
30 50 70 90 110 130 150 170 190 210 230 250
TP92A
Rp 2" (50)
CIB UNIGAS - M039177CA
TP91A
90
DN65
80
70
60
DN80
50
40
30
DN100
20
10
0
50 100 150 200 250 300
3
/h
Stm
TP93A
Rp 2" (50)
DN65
DN80
DN100
Stm
3
/h
GAS PRESSURE (mbar)
TP512A
GAS PRESSURE (mbar)
120
100
80
DN65
60
40
20
0
50 100 150 200 250 300 350
200
150
Rp 2" (50)
100
50
0
50 100 150 200 250 300 350 400 450 500 550
Rp 2" (50)
DN80
DN100
Stm
DN65
DN80
DN100
Stm
3
/h
TP515A
3
/h
200
160
120
80
40
0
50 100 150 200 250 300 350 400 450 500
250
Rp 2" (50)
200
150
100
50
0
50 100 150 200 250 300 350 400 450 500 550 600 650
Rp 2" (50)
DN65
DN80
DN100
DN65
DN80
DN100
Stm
Stm
3
/h
3
/h
TP520A
400
350
300
250
200
150
100
50
GAS PRESSURE (mbar)
0
100 150 200 250 300 350 400 450 500 550 600 650 700 750
Rp 2" (50)
DN65
DN80
DN100
Stm
12
TP525A
3
/h
500
450
400
350
300
250
200
150
100
50
0
200 300 400 500 600 700 800 900 1000 1100
DN65
DN80
DN100
Stm
3
/h
MOUNTING AND CONNECTING THE BURNER
CIB UNIGAS - M039177CA
Packing
The burners are despatched in wooden crates. Their dimensions are:
9xA series: 1740 x 1270 x 1010 (W x H x D)
5xxA series:
1740 x 1420 x 110 (W x H x D)
Packing cases of this type are affected by humidity and are not suitable for stacking.
The following are placed in each packing case:
1 burner with gas train detached but electrically connected to the burner;
1 gasket to be inserted between the burner and the boiler;
1 envelope containing this manual.
To get rid of the burner’s packing and in the event of scrapping of the latter, follow the
procedures laid down by current laws on disposal of materials.
Handling the burner
ATTENTION! the lfting and moving oper ations must be carried out by special ised and trained personnel. If
these operations are not carried out perfectly, there is the residual risk of the burner to overturn and fall
down.
As for moving the burner, use means suited for the weight to sustain (se e paragraph “Technical specifications”).
The burner is provided with eyebolts, for handling operations.
Eyebolts
Fig. 11
H
W
D
13
CIB UNIGAS - M039177CA
Fitting the burner to the boiler
1 To perform the installation, it is necessary to drill the boiler door as described on paragra ph “Overall dimensions”;
2 screw the studbolts (5) on the boiler’s door, according to the drilling plate (see paragraph “Overall dimensions”);
3 move the burner towards the boiler: lift the burner by means of the eyebolts placed on its top side;
4 remove the blast tube unscrewing the three screws behind th e burner flange;
5 place the gasket on the burner flange;
6 replace the blast tube: before fastening completely the screws, avoid any misalignement between the blast tube axis and the com-
bustion head axis;
7 install the burner to the boiler;
8 fix the burner to the stud bolts, by means of the fixing nuts, according to Fig. 12.
9 After fitting the burner to the boiler, ensure that the gap between the blast tube and the refractory linin g is sealed with ap propriate
insulating material (ceramic fibre cord or refractory cement).
Keys
1 Burner
2 Fixing nut
3 Washer
4 Gasket
5 Stud bolt
7 Blast tube
Fig. 12
Fan installation
Pay attention when designing the air duct: dimensioning must be performed according to the flow rate, th e temperature, the distance
between the fan and the burner and according to the fan features as well.
ATTENTION! The bellows unit provided is made of canvas and is provided with bl ocking spacers to avoid braking it
during installation: first place the bellows unit between flanges, then remove the spacers.
14
CIB UNIGAS - M039177CA
Matching the burner to the boiler
The burners described in this manual have been tested with combustion chambers that co mply with EN676 regulation and whose
dimensions are described in the diagram . In case the burner mu st 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 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:
z Cast-iron boilers, three pass flue boilers (with the first pass in the rear part): the blast tube must protrude no more than 100 mm into
the combustion chamber.
z Pressurised boilers with flame reversal: in this case the blast tube must penetrate at least 50 - 100 mm into combustion chamber in
respect to the tube bundle plate.
The length of the blast tubes does not always allow this requirement to be met, and thus it may be necessary to use a suitablyspacer to move the burner backwards or to design a blast tube tha suites the utilisation (please, contact the manifacturer).
Key
a) Heat output in kW
b) Lenght of the flame tube in meters
c) Flame tube firing intensity in MW/m
3
d) Combustion chamber diameter (m)
Fig. 13 -Firing intensity, diameter and lenght of the test flame tube as a function
of the heat input in kW.
sized
15
CIB UNIGAS - M039177CA
GAS TRAIN CONNECTIONS
The diagrams show the components of the gas trai included in the delivery and which must be fitted by the installer.The diagrams are in
compliance with the current laws.
ATTENTION: BEFORE EXECUTING THE CONNECTIONS TO THE GAS PIPE NETWORK, BE SURE THAT THE MANUAL
SHUTOFF COCKS ARE CLOSED.
Gas train - 1
Gas train with valves group VGD 20/40 with built-in gas pressure governor + VPS504 gas proving system
10
54
MANUFACTURER
INSTALLER
1
6
78
2
3
Gas train - 2 (Rp2)
Gas train with valves group MBC 1200SE(2 valves + gas filter + pressure governor + pressure switch) + VPS504 gas proving
system
18
MANUFACTURER
54
INSTALLER
1
7
8
2
3
Gas train 3(DN65/80/100)
Gas train with valves group MBC 1900/3100/5000SE (2 valves + gas filter + pressure governor + pressure switch) + VPS504
gas proving system
MANUFACTURER
INSTALLER
1
2
Key
1 Burner
2 Butterfly valve
3 Gas proving system
4 Low gas pressure switch
5 High gas pressure switch (optional)
6 Gas filter
7 Bellow joint
8 Manual cock
11 VGD valves group
18 MBC valves group (2”, provided with filter)
19 MBC valves group (DN65/80/100)
19
54
6
78
3
16
Assembling the gas grain
To assemble the gas train, proceed as follows:
”direction” arrows for installation
CIB UNIGAS - M039177CA
gas supply network
1A
5
3
1E
1C
1B
4
Keys
1A..1E Gasket
2 Gas filter
3 Gas valves group
4 Bellow joint
21D
5 Manual cock
Fig. 14 - Example of gas train
To mount the gas train, proceed as follows:
1-a) in case of threaded joints: use proper seals according to the gas used;
1-b) in case of flanged joints: place a gasket (no. 1A..1E - Fig. 14) between the elements
NOTE: the bellow joint, the manual cock and the gaskets are not part of the standard supply.
ATTENTION: once the gas train is mounted according to the diagram on Fig. 14, the gas proving test mus be perfor-
med, according to the procedure set by the laws in force.
The procedures of installation fo the gas valves are showed in the next paragraphs, according to the gas train used:
z threaded gas trains with Multibloc Dungs MBC..SE 1200 or Siemens VGD20..
z flanged gas trains with Multibloc Dungs MBC..SE 1900-3100-5000 or Siemens VGD40..
17
Loading...