baltur COMIST 180 NM User manual

Edition
2003/11
Cod. 0006080810
- Instruction for burners model
COMIST 180 NM
COMIST 250 NM
COMIST 300 NM
en

1
- The works on the burner and on the system have to be carried out only by
competent people.
- Read carefully the instructions before starting the burner and service it.
- The system electric feeding must be disconnected before starting working on it.
- If the works are not carried out correctly it is possible to cause dangerous
accidents.
L'Amministratore delegato
Dott. Riccardo Fava
Manufacturer’s declaration
We hereby declare that our gas, light oil, heavy oil, and combination (gas/light oil or gas/heavy oil) burners
are manufactured in conformance with current CE, CEI and UNI standards.
• BALTUR guarantees the “CE” certification provided that the burner is coupled to the “CE” gas train supplied
by BALTUR and the “CE” gas line accessories (on request).
NOTE: this declaration is not valid with regard to EC or UNI Standards for gas burners or the gas part of duel-
fuel burners (gas/light oil or gas/heavy oil) when such burners have been ordered in non-compliance with the
EC Standard or Italian UNI Standard because they are to be used for special purposes not provided for in the
above-mentioned standards.
0006080197Rev.1
BALTUR S.p.A.
Via Ferrarese 10 - 44042 CENTO (Ferrara) ITALIA
Tel. [phone] Fax [phone]
(International Tel. ++39.051.684.37.11 - Fax ++39.051.683.06.86)
http://www.baltur.it - http://www.baltur.com - E-MAIL [email protected]

2
INDEX PAGE
- Technical characteristics........................................................................................................................“ 3
- Application of the burner to the boiler ...................................................................................................“ 6
- Electrical connections - Low pressure gas supply system .....................................................................“ 7
- Medium pressure gas supply system.....................................................................................................“ 9
- Fuel supply system (fuel oil) - Specific instructions for igniting a mixed fuel burner .............................“ 11
- Description of operation with fuel oil ......................................................................................................“ 13
- Description of operation with methane...................................................................................................“ 17
- Ignition and regulation with fuel oil .........................................................................................................“ 18
- Air regulation at the combustion head ...................................................................................................“ 19
- Adjusting the gap between the disc and nozzle - UV photocell -
Variation for burners fitted with a fuel oil vapour pre-heater...................................................................“ 20
- Ignition and regulation with methane .....................................................................................................“ 22
- Air regulation at the combustion head ...................................................................................................“ 24
- Reading the gas meter...........................................................................................................................“ 24
- Using the burner - Maintenance.............................................................................................................“ 25
- General diagram air regulation ..............................................................................................................“ 26
- Air control and command servomotor....................................................................................................“ 27
- Gas valve unit ........................................................................................................................................“ 28
- Command and control equipment..........................................................................................................“ 33
- Equipment for checking for gas valve tightness.....................................................................................“ 38
- Wiring diagrams.....................................................................................................................................“ 40

3
TECHNICAL SPECIFICATIONS N° 0002570121
n° 1 of 3
CARATTERISTICHE TECNICHE MODELLO / MODEL / MODELO
TECHNICAL DATA COMIST COMIST COMIST
CARACTERÍSTICAS TÉCNICAS 180 NM 250 NM 300 NM
MAX kW 1981 3380 3878
MIN kW 688 1127 1304
MAX m³/h 199 340 390
MIN m³/h 69 113 131
PRESSIONE MIN. (Per ottenere la portata max)
MIN. PRESSURE(In order to obtain the maximumflow rate) CE mbar
PRESIÓNMETANO MÍN. (Para obtener el caudal max)
TRASFORMATORE METANO / NAT. GAS TRANSFORMER
TRANSFORMADORES DE ENCENDIDO METANO
MAX kW 1981 3380 3878
MIN kW 688 1127 1304
MAX m³/h 177,5 303 347
MIN m³/h 61,5 101 117
VISCOSITA' COMBUSTIBILE / FUEL VISCOSITY/
VISCOSIDAD COMBUSTIBLE
TRASFORMATORE GASOLIO / LIGHT OIL TRANSFORMER
TRANSFORMADORES DE ENCENDIDO GASÓLEO
SERBATOIO / PRE-HEATER / RESISTENCIAS kW 15 18 25,5
TENSIONE / VOLTAGE / TENSIÓN Volt 3N ~ 400V
MOTORE VENTOLA/FAN MOTOR / MOTORES VENTILADOR kW 37,57,5
MOTORE POMPA / PUMP MOTOR / MOTORES BOMBA kW 1,1 1,1 2,2
MATERIALE A CORREDO / STANDARD ACCESSORIES / MATERIAL EN DOTACIÓN
GUARNIZIONE ISOLANTE / INSULATING GASKET /
EMPAQUETADURA 222
FILTRO / FILTER 1"1/4 1"1/4 1"1/2
TUBI FLESSIBILI / FLEXIBLE PIPE / TUBOS FLEXIBLES N°2 1"1/4 x 1"1/4 1"1/4 x 1"1/4 1"1/2 x 1"1/2
PRIGIONIERI / STUD BOLTS / ESPÁRRAGOS N°6 M20 N°3 M20 N°3 M20
DADI /EXAGONAL NUTS /TUERCAS N°6 M20 N°3 M20 N°3 M20
RONDELLE PIANE / FLAT WASHERS / ARANDELAS N°6 ø20 N°3 Ø20 N°3 Ø20
POTENZATERMICA/ THERMIC CAPACITY/
POTENCIATÉRMICA
PORTATA/ FLOW RATE / CAUDAL
7°E - 50°C
POTENZATERMICA/ THERMIC CAPACITY/
POTENCIATÉRMICA
PORTATA/ FLOW RATE / CAUDAL
8kV - 20mA
150
12kV - 30mA 14kV - 30mA 14kV - 30mA
METANO /
NATURAL GAS
OLIO COMBUSTIBILE
HEAVY OIL / PETRÓLEO

4
N° 0002570121
n° 2 of 3
COMPONENT LIST
1 - Pompa
2 - Servomotore regolazione aria
3 - Quadro elettrico
4 - Motore ventola
5 - Vite regolazione aria alla testa di combustione
6 - Serbatoio preriscaldatore
7 - Motore pompa
8 - Valvola regolatrica di pressione
9 - Valvola funzionamento rampa pilota
(solo per COMIST 300 NM)
10 - Valvola sicurezza
1 - Pump
2 - Air regulation servomotor
3 - Electric board
4 - Fan motor
5 - Combustion head air control knob
6 - Pre-heater
7 - Pump motor
8 - Regulation valve pressure
9 - Pilot main valve (only for COMIST 300 NM)
10 - Safety valve
11 - Main valve
12 - Pressure switch for the valve tightness control
13 - Burner fixing flange
14 - Insulating gasket
15 - Combustion head
16 - Gas pressure switch min.
17 - Gas pressure switch max
18 - UV Photocell
19 - Electromagnet
20 - Air pressure switch
1 - Bomba
2 - Servomotor regulación aire
3 - Cuadro eléctrico
4 - Motor ventilador
5 - Tornillo regulación aire en el cabezal de
combustión
6 - Precalentador
7 - Motor bomba
8 - Válvula de regulación presión
9 - Vólvula funcionamiento tren piloto
(solo para COMIST 300 NM)
10 - Válvula de seguridad
11 - Válvula de funcionamiento
12 - Presóstato control de estanquiedad
de válvulas
13 - Brida unión quemador
14 - Empaquetadura aislante
15 - Cabezal de combustión
16 - Presóstato gas mínima
17 - Presóstato gas máxima
18 - Fotocelula UV
19 - Electroiman
20 - Presóstato aire
11 - Valvola funzionamento
12 - Pressostato controllo tenuta valvole gas
13 - Flangia attacco bruciatore
14 - Guarnizione isolante
15 - Testa di combustione
16 - Pressostato gas di minima
17 - Pressostato gas di massima
18 - Fotocellula UV
19 - Elettromagnete
20 - Pressostato aria

5
N° 0002570121
n° 3 di 3
N° BT 8111/2
CAMPO DI LAVORO - WORKING FIELD - RANGO DE TRABAJO
Dimensioni / Dimensions / Dimensiones
A A1 A2 B B1 B2 B3 C D E F G L M N
min max
COMIST 180 NM 915 465 450 1225 450 775 485 1700 330 540 260 245 DN65 400 M20 300
COMIST 250 NM 1025 545 480 1255 580 675 385 1750 320 500 320 273 DN65 490 M20 340
COMIST 300 NM 1025 545 480 1260 580 680 385 1750 320 500 320 273 DN65 490 M20 350
Mod.

6
APPLICATION OF THE BURNER TO BOILER for mod. COMIST 180
1 - Boiler plate
2 - Insulating gasket
3 - Burner fixing flange
4 - Stud bolt
5 - Locking nut with washer
6 - Burner flange fixing screw
REMARKS
When tightening the flange, it is important to do it evenly so that the inner faces are parallel between them.
Since the locking system is highly efficient, do not tighten the nuts too much. During this operation (tightening of
the flange locking nuts) keep the body of the burner lifted so that the combustion head is kept in a horizontal
position.
Remark:
The burner is correctly installed when the pre-heating tank is slightly inclined (higher on the side where fuel exits
to go to the nozzle). This inclination serves to prevent gas from building up inside the tank.
Presence of gas in the preheating tank will greatly increase the time required to pressurise the fuel, and it is quite
likely that the burner will go into “block”. Be careful when installing the burner on the boiler that the burner is not
positioned where it cancels this inclination or, even worse, where the preheating tank is sloping in the opposite
direction to the direction desired.
0002933340
1 - Boiler plate
2 - Insulating gasket
3 - Burner fixing flange
4 - Stud bolt
5 - Locking nut with washer
APPLICATION OF THE BURNER TO BOILER for mod. COMIST 250 - 300
0002933750.tif

7
GENERAL DIAGRAM FOR INSTALLATION OF GATE-FILTER-
STABILIZER-ANTI-VIBRATION JOINT-OPENABLE PITTING
8780GB.tif
ELECTRICAL CONNECTIONS
It is advisable to make all connections with flexible electrical wire.
The electrical lines must be kept away from hot parts. Make sure that the voltage and frequency of the electrical
power supply to which the equipment is to be connected is suitable for the burner. Make sure that the electrical
power supply, the relative fuse switch (essential) and possible limiting device, can take the maximum current
absorbed by the burner. For details, see the specific wiring diagrams for each single burner.
LOW PRESSURE GAS SUPPLY SYSTEM (max. 400 mm. H2O)
Once the burner has been fitted to the boiler correctly, connect it to the gas piping (see BT 8780 and BT 1387).
Thegasfeed pipingmust be sizedaccording to lengthand deliveryfor a loadloss of notmore than5 mm H20(see
diagram). The piping must be completely airtight and suitably tested before testing the burner.
Acoupling must be fitted on this piping, near the burner,
allowingtheburner toberemoved easilyand/orthe boiler
door to be opened. The following must also be fitted:
ball cutoff cocks, gas filter, a pressure stabiliser or
reducer(when the feedpressure exceeds400 mmH2O.
= 0,04 kg/ cm2), and an anti-vibration union.
These parts must be installed as shown in our drawings
(see BT 8780).
The following practical advice concerns the installation
of essential accessories on the gas piping, near the
burner.
1) To avoid big pressure drops on ignition there should
be a piece of pipe 1.5 - 2 m long between the point
wherethe pressurestabiliser orreduceris fitted,and
the burner. The diameter of this pipe must be the
same or larger than the burner connection fitting.
2) The gas filter must be fitted to horizontal piping in
order to avoid any impurities falling into the piping
and getting into the stabiliser, during cleaning.
3) To obtain maximum performance from the pressure
stabiliser, it should be fitted to a horizontal part of
the piping, after the filter. In this way, vertical
movement of the entire mobile part of the stabiliser
(shutter)takes place immediatelyand quickly. (Ifthe
mobile part moves horizontally - stabiliser fitted to
vertical piping - friction in the guide bushing/s of the
pin on which the entire mobile part rests, will slow
down this movement).
4) It is advisable to fit a bend on the gas train of the
burner, before fitting the removable union. This will
allow a possible door on the boiler to be opened,
after the union itself has been opened.
The above is clearly shown in the drawing.

8
DIAGRAM FOR CALCULATING THE DIAMETER OF THE PIPES IN
RELATION TO THEIR LENGTH AND GAS FLOW N° BT 8058
DIAMETER OF PIPES IN INCHES
PRESSURE DROP IN mm OF H2O
FLOW IN mc/h OF METHANE p.a. 0,60
LENGTH OF PIPES IN METERS
FLOW (m3/h) METHANE GAS (d = 0,85) IN
COMMERCIAL GAS PIPES (UNI 3824-68) LOAD
LOSS MAX. 5 mm.W.C.
N° BT 1387
LUNGHEZZA VIRTUALE TRATTAin m / VIRTUAL LENGHT DEALT WITH IN METRES LONGUER VIRTUELLE en m / VIRTUELLE LÄNGE in m / LONGITUD VIRTUAL en m.
PORTATA / FLOW / DEBIT / DURCHSATZ / CAUDAL m3/h
BT 1387