Unigas PN30 Installation and operation manual

Technical Documentation CIB Unigas - Campodarsego (PD)
MANUAL OF
- INSTALLATION
- OPERATION
- MAINTENANCE
HEAVY OIL BURNERS
PN30
SINGLE STAGE VERSION
M03930CC Rev. 02 06/01

NOTICES2
NOTICES
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 SEC-
TION 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 instruc-
tions, by qualified personnel.
!Qualified personnel means those having technical knowle-
dge in the field of components for civil or industrial heating
systems, sanitary hot water generation and particularly ser-
vice centres authorised by the manufacturer.
!Improper installation may cause injury to people and ani-
mals, 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 - contactthe supplier.
The packaging materials (wooden crate, nails, fastening devi-
ces, plastic bags, foamed polystyrene, etc), should not be left
within the reach of children, 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.
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 quali-
fied personnel at regular intervals, following the manufactu-
rer’s instructions.
!When a decision is made to discontinue the use of the
equipment, those parts likely to constitute sources of dan-
ger shall be made harmless.
!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.
!For all the units that have been modified or have options fit-
ted then original accessory equipment only shall be used.
!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.
2) SPECIAL INSTRUCTIONS FOR BURNERS
!The burner should be installed in a suitable room, with ven-
tilation openings 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 bur-
ner, the user shall have qualified personnel carry out the fol-
lowing 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 firebox.
!Before the burner is started and, thereafter, at least once a
year, have qualified personnel perform the following opera-
tions:
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
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 repeated burner shut-downs, do not continue re-
setting the unit manually. Contact qualified personnel to
take care of such defects.
!The unit shall be operated and serviced by qualified per-
sonnel only, in compliance with the regulations in force.

NOTICES 3
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 thatall saftey requirements are met. In case of any
doubt, ask for an accurate inspection of electrics by quali-
fied personnel, since the manufacturer cannot be held lia-
ble 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 particu-
lar, make sure that the system cable cross section is ade-
quate for the power absorbed by the unit.
!No adaptors, multiple outlet sockets and/or extension
cables are permitted 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 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
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 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
!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 sup-
ply 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 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
dimensions are adequate to the burner firing rate, and that
the system is equipped with all the safety and control devi-
ces 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 regula-
tions, 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.

PART I: INSTALLATION MANUAL4
TECHNICAL DATA
BURNER MODEL IDENTIFICATION
Burners are identified by burner type and model. Burner model identification is described here following.
Type: PN30 Model: N-. TN. S. IT. A.
(1) (2) (3) (4) (5) (6)
(1) BURNER TYPE
(2) FUEL N - Heavy oil, viscosity up to 7° E at 50° C
E - Eco heavy oil (environmental friendly), viscosity 12 °E at 50°C
D - Heavy oil, viscosity up to 50° E at 50° C
(3) OPERATION Available versions AB - Double stage
(4) BLAST TUBE LENGHT (See overall dimensions)
Available versions S - Standard
L - Long
(5) DESTINATION COUNTRY * - see data plate
(6) SPECIAL VERSIONS A - Standard E - with junction box
Y - SpecialeM - Wall mounting electrical board
G - Floor standing electrical board and junction box
BURNER PN30
Input min. kcal/h 140.000
max. kcal/h 300.000
min. kW 163
max. kW 349
Oil rate min. Kg/h 14
max. Kg/h 30
Fuel heavy oil
Power supply V 230/400
Frequency Hz 50
Motor 2800 rpm kW 0.74
Pre-heater resistor kW 2.4
Total electrical power kW 3.65
Weight Kg 60
Operation single stage
Destination country *
PART I: INSTALLATION MANUAL

PART I: INSTALLATION MANUAL 5
OVERALL DIMENSIONS
Fig. 4
PERFORMANCE CURVE
ABBLCCLDEFGKZVWM
PN30 520 160 350 680 870 270 450 720 131 400 160 155 219 M10
BACKPRESSURE IN
COMBUSTION CHAMBER mbar
PN30
kW
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
3
140 160 180 200 220 240 260 280 300 320 340 360 380

PART I: INSTALLATION MANUAL6
MOUNTINGS AND CONNECTIONS
Imballo
The burners are despatched in wodden crates of dimensions 10070 x 740 x 840 (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
2 flexible light oil tubes;
1 oil filter;
1 this manual, the test certificate and the compliance declaration.
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.
Matching the burner to the boiler
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 cho-
ose 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 100
mm into the combustion chamber.
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.
!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.
Fitting burner to the boiler
After fitting the burner to the boiler see that the space between the blast tube
and the refractory lining is sealed with appropriate insulating material (cera-
mic fibre cord or refractory cement).
Key
5 Burner
6 Fixing nut
7 Washer
8 Seal
9 Stud bolt
10Sightglass cleaning tube
11Blast tube Fig. 5

PART I: INSTALLATION MANUAL 7
ELECTRICAL CONNECTIONS
!Remove the front panel of the electrical board on the burner.
Carry out the connections in the power supply electrical board as shown in Fig. 6; verify the fan motor direction and refit the
electrical board front panel.
!For a complete key of electrical diagrams see on page 22.
Fan motor direction
After completing the electrical connection of the burner, remember to check the rotation of the fan motor. The motor should
rotate in an anti-clockwise direction looking at cooling fan. In the event of incorrect rotation reverse the three-phase supply and
check again the rotation of the motor.
ATTENTION: the burners are supplied for three-phase 400 V supply, and in the case of three-phase 230 V supply it is neces-
sary to modify the electrical connections inside the terminal box of the electric motor, replace the thermal overload relay and
modify the resistors connections.
WARNING: The burner is fitted with an electrical bridge between terminals 6 and 7, in the event of connecting the
high/low flame thermostat remove this bridge before connecting the thermostat.
IMPORTANT: In connecting electric supply wires to burner teminal block be sure thatground wire should be longer
than phase and neutral ones.
Fig. 6
RESPECT THE BASIC SAFETY RULES. MAKE SURE OF THE CONNECTION TO THE EARTHING SYSTEM. DO NOT
REVERSE THE PHASE AND NEUTRAL CONNECTIONS. FIT A DIFFERENTIAL THERMAL MAGNET SWITCH
ADEQUATE FOR CONNECTION TO THE MAINS.
Pre-heater resistors
2.4 - 4.5 kW Electrical motor terminal block
Fig. 7a Fig. 7b
230V 400V 230V 400V

PART I: INSTALLATION MANUAL8
HYDRAULIC DIAGRAMS 3ID0010 E 3ID0012 - Complete key
1 Oil storage tank
2 Foot valve
3 Oil storage tank pre-heating coils (1)
4 Oil circuit filter (1 mm mesh)
5 Circuit pressure regulator
6 Pressure gauge scale 0 - 10 bars
7 Pressure regulator by-pass valve (5)
8 Gate valve
9 Oil circuit pressure regulator pump
10 Pump pressure regulator (9)
11 One-way valve
12 Oil buffer tank pre-heater (19)
13 Oil buffer tank thermostat
14 Burner enabling thermostat
15 Thermometer scale 0 - 90° C
16 Oil buffer tank heater enabling pressure switch
17 Oil buffer tank pre-heating coil (19)
18 Oil buffer tank air vent valve
19 Oil buffer tank, capacity 600 l approx.
20 Oil filter (0.3 mm mesh)
21 Fuel cutoff solenoid valve
22 Fuel gate valve
23 Burner pump hoses (24)
24 Burner oil pump
25 Pre-heating tank resistor
26 Pre-heating tank
27 Oil enabling thermostat TCN (26)
28 Pre-heating tank resistor safety thermostat TRS (26)
29 Oil temperature regulator thermostat TN (26)
30 Pre-heating tank (26) filter (0.1 mm mesh)
31 Thermometer 0 - 200° C
32 Check valve, opening 3.5 - 6 bars
33 Solenoid valve EVN1
37 Ignition enabling thermostat TCI
42 Burner enabling thermostat
43 Burner
45 Coils and tubes pre-heating pumps thermostat
46 Oil buffer tank pre-heating water pump (19)
47 Oil storage tank pre-heating water pump (1)
48 Pre-heating water balance calibration valves
50 Oil pump (diagram 3ID0012 only)
52 Maximum circuit pressure switch (if present)

PART I: INSTALLATION MANUAL 9
OIL SUPPLY PIPING INSTALLATION DIAGRAM
Fig. 8 - Hydraulic diagram 3ID0010 for 1 burner installations
OIL CIRCUIT PRE-HEATED WATER CIRCUIT PRE-HEATING 50°C PRE-HEATING 70°C
LIMIT OF BURNER SUPPLY

PART I: INSTALLATION MANUAL10
Fig. 9 - Hydraulic diagram 3ID0012 for 2 or more burners
OIL CIRCUIT PRE-HEATED WATER CIRCUIT PRE-HEATING 50°C PRE-HEATING 70°C
LIMIT OF BURNER
SUPPLY
NOTE: PRE-HEATING OF
ENABLING THERMOSTAT
CONNECTION TUBE (16)
BURNER 2
BURNER 1

PART I: INSTALLATION MANUAL 11
REGULATIONS
Pump priming
Before regulating, the oil pump must be primed as follows:
!Before starting up the burner, make sure the storage tank return pipe is not blocked. Blockage could cause the pump seal to
break.
!Start up the burner, open the solenoid valve and vent the air at the pressure gauge connection, then illuminate the photoresi-
stor.
Oil flow regulation
Oil flow is regulated by choosing the correct size of nozzle and calibrating pump delivery pressure (see outline oil circuit diagram
in Fig. 10). To select the nozzle, consult Tab. 1. To regulate pump pressure, see page 12. Further information on oil pump cha-
racteristics are given in the appendix.
SINGLE TUBE INSTALLATION
The burners leave the factory with two-tube fuel supply. They can, however, be converted to single-tube fuel supply.
See appendix for details.
Oil circuit - operating principle
Key
1 Filter
2Pump
3 Pre-heating tank
4 Pre-heating resistor
5 Pre-heating resistors thermostat
6 Oil enabling thermostat and safety ther-
mostat
7 Oil thermostat
8 Check valve
9Piston
10Normally open valve
11Nozzle
A Nozzle inlet
B By-passed oil
C Returned oil
D Manual drain
E Suction
F Return
Fig. 10
119
10
CB
A
8
7
54
3
6
2
EF
1

PART I: INSTALLATION MANUAL12
SELECTING THE OIL NOZZLES
Tab. 1 - Nozzle flow rate in relation to oil pressure
OIL PUMPS
Key
1 Pressure adjustment
2 Pump pressure gauge
3 Vacuum gauge
5Nozzle
7Suction
8Return
Note: the 1069 pumps are fitted with mechanical seal and electric pre-heater (80 W).
NOZZLE
G.P.H. PUMP PRESSURE bar
24 25* 26
1,35 8,70 8,90 9,10
1,50 9,70 9,90 10,10
1,65 10,60 10,90 11,10
1,75 11,30 11,50 11,70
2,00 12,90 13,20 13,40
2,25 14,50 14,80 15,10
2,50 16,10 16,50 16,80
3,00 19,30 19,70 20,10
3,50 22,50 23,00 23,50
4,00 25,80 26,30 26,80
4.50 29.00 29.60 30.20
5.00 32.20 32.90 33.60
* Pressure set in the factory
Pump Suntec E4
Suction height 0.5 bar
Advised value to prevent air separation from oil0.35 bar
Rated speed max. max. 3600 g/m
Operation viscosity from 2.8 to 800 cSt
Oil temperature Type 1001: max, 90° C
Type 1069: max. 120° C
Maximum pressure in the suction and return
piping
Type 1001: 1.5 bar
Type 1069: 3.5 bar
Type 1001 and 1069: 3.5 bar
SUNTEC PUMPS
N-.AB... E-.AB... D-.AB...
PN30 E4 NC 1001 E4 NC 1069 E4 NC 1069

PART I: INSTALLATION MANUAL 13
AIR FLOW REGULATION
Slacken the screw VBS and set the required air flow working directly on the air damper. At the end of setting tight the screw
VBS.
Fig. 11
OIL THERMOSTAT ADJUSTMENT
To access the thermostats, remove the cover of the burner switchboard. Calibrate using a screwdriver on the VR screw as
shown in the figure.
NOTE: thermostat TCI is fitted on burners fired with fuel oil with a viscosity of 50° E at 50° C only.
TCN - oil enabling thermostat (Fig. 12a)
Calibrate this thermostat to a value 10% lower than
that indicated in the viscosity-temperature diagram
(Fig. 13).
TRS - Resistor safety thermostat (Fig. 12a)
The thermostat is set during factory testing at a
value of about 190° C.
This thermostat trips when the operating tempera-
ture exceeds the set limit. Ascertain the cause of
the malfunction and reset the thermostat using the
PR button.
TR - Resistor thermostat (Fig. 12a)
Calibrate this thermostat to the correct value accor-
ding to the viscosity-temperature diagram (page
14) and check the temperature using a thermome-
ter with a scale of up to 200° C mounted on the pre-
heating tank..
TCI - Installation enabling thermostat (Fig. 12b)
This thermostat is fitted on burners fired with oil at a
viscosity of 50° E at 50° C only. Set the thermostat
to a temperature about 40° C lower than the TR.
Fig. 12a Normal and environmentally friendly oil burners
Fig. 12b - Dense oil burners
VBS
PR
VR VR
VR VR
VR
PR

PART I: INSTALLATION MANUAL14
VISCOSITY VS TEMPERATURE DIAGRAM
Fig. 13
VISCOSITY vs. TEMPERATURE DIAGRAM
BEST VISCOSITY RANGE FOR A
PROPER ATOMIZATION
1,2
1,3
1,4
1,5
1,6
1,7
1,8
1,9
2
50 60 70 80 90 100 110 120 130 140 150 160 170 180
TEMPERATURE (°C)
VISCOSITY (°E)
3°E AT50°C
5°E AT50°C
7°E AT50°C
12°E AT50°C
15°E AT50°C
20°E AT50°C
50°E AT50°C

PART I: INSTALLATION MANUAL 15
BURNER IGNITION PROCEDURE
Oil pump
!Check that mains voltage corresponds to the voltage indicated on the rating plate.
!Check oil pressure in the feeding hydraulic circuit (about 2 bars at 50°C).
!Check that the oil supply cocks are open.
!Check that the motor rotates anticlockwise looking at the motor from the cooling cover.
!Manually operate the burner motor command contactor until the pre-heating tank and entire burner oil circuit is full.
Factory settings during burner testing
Refer to the hydraulic diagrams on page 9 - page 10 and Fig. 14. Also see Fig. 10 on page 11.
After filling the pre-heating tank, the burner is ready for operation.
Turn on the main switch on the burner switchboard. This starts pre-heating of the oil until the temperature set on thermostat
TCN is reached. The resistors remain on until the temperature set on thermostat TR is reached.
When the contact of thermostat TCN closes, the fan motor starts up and the pre-washing phase begins. During this phase, the
oil is sucked up by the pump (24), passes through the filter (20) and is introduced into the tank (26) where it is pre-heated.
On leaving the pre-heating tank, the oil crosses the check valve (32) and reaches the nozzle U (normally closed by pin S). It
crosses the normally open valve EN1 and returns to the oil buffer tank (19); at this stage, the pressure may vary from 3 to 10
bar.
The pre-washing phase is necessary to remove possible fuel residues accumulated during the period of inactivity and comple-
tely free the piping and nozzle assembly of obstacles. During this phase, the flow of oil to the nozzles at the ideal temperature
for combustion is guaranteed.
At the end of pre-washing, the temperature at the nozzles is the same as the temperature in the pre-heating tank. The servo
control supplies the EVN1 valve, the pressure in the circuit equals the one set in the pump working on the pin causing it to move
back and allowing the oil to flow freely to the nozzle. This principle is valid for all models.
COMBUSTION HEAD SETTING
The burner is adjusted by the factory with the combustion head in the "MAX." position, corresponding to the maximum output.
To operate at a reduced power, move back the combustion head progressively, towards the "MIN." position, by means of the
screw VRT. (Fig. 14).
NOTE: Unloose the screw VB before start the setting and tight it at the end of setting.
Oil viscosity 3 ÷ 5°E (N-) 15 ÷ 50°E (D-, E-)
Burner head position: fully forward (maximum opening position) - -
Oil pressure measured at solenoid valve distribution block 25 bar 25 bar
Oil enabling thermostat TCN calibration 90°C 100°C
Oil thermostat TR calibration 120°C 130°C
Resistor safety thermostat TRS calibration 170°C 190°C
Plant enabling thermostat TCI (only dense oil burners) - 80°
Thermal cutout calibration according to motor rating plate
Fig. 14
US
VB
VRT

PART II: OPERATION MANUAL16
LIMITATIONS ON THE USE OF THE EQUIPMENT
THE BURNER HAS BEEN DESIGNED TO OPERATE ONLY AFTER IT HAS BEEN CORRECTLY CONNECTED TO A HEAT
GENERATING UNIT (E.G. BOILERS, WARM AIR HEATERS, FURNACES ETC.) AND ALL OTHER USES MUST BE CONSI-
DERED IMPROPER AND THEREFORE DANGEROUS.
THE USERS MUST GUARANTEE THE CORRECT ASSEMBLY OF THE EQUIPMENT AND HAVE IT INSTALLED BY QUALI-
FIED PERSONNEL. THEY MUST HAVE THE FIRST COMMISSIONING OF THE EQUIPMENT CARRIED OUT BY A SER-
VICE CENTRE AUTHORIZED BY THE MANUFACTURERS OF THE BURNERS. FOR THIS PURPOSE THE ELECTRICAL
CONNECTIONS TO THE REGULATING AND SAFETY EQUIPMENT OF THE GENERATOR (OPERATING THERMOSTATS,
SAFETY DEVICES ETC.) WHICH ENSURE THE PROPER AND SAFE FUNCTIONING OF THE BURNER, ARE OF GREAT
IMPORTANCE.
ANY OPERATION OF THE EQUIPMENT WHICH MAKES NO ALLOWANCE FOR THE INSTALLATION OPERATIONS OR
WHICH OCCURS AFTER THE COMPLETE OR PARTIAL INCORRECT HANDLING OF THESE OPERATIONS (E.G.
DISCONNECTION EVEN IF ONLY PARTIAL OF THE ELECTRICAL CONDUCTORS, OPENING OF THE DOOR OF THE
GENERATOR, DISMANTLING OF PARTS OF THE BURNER) MUST BE OMITTED.
NEVER OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE.
ONLY OPERATE THE CONTROL SWITCH OF THE BOILER AND, WHERE APPLICABLE, THE RESET PUSH BUTTON.
IF THE EQUIPMENT BECOMES LOCKED OUT AGAIN DO NOT CONTINUE TO USE THE RE-SET PUSH BUTTON AND
CONSULT QUALIFIED PERSONNEL WHO WILL BE ABLE TO ELIMINATE THE OPERATING FAULT.
WARNING: DURING NORMAL OPERATION THE PARTS OF THE BURNER NEAREST THE HEAT GENERATOR (COU-
PLING FLANGE) ARE SUBJECTED TO HEATING. DO NOT TOUCH THEM SO AS TO AVOID SUFFERING BURNS.
OPERATION
!Bring switch A on the burner control panel to position 1.
!Make sure the burner is not blocked (indicator light B lit). If necessary, reset using button C.
!Make sure the series of thermostats (or pressure switches) enables burner operation.
!Start the burner ignition cycle. The control unit starts up the burner fan and at the same time turns the ignition transformer on
(indicated by light H on the front panel). Pre-purgue lasts 13 or 25 seconds depending on the control unit fitted on the burner.
!At the end of pre-purgue, the oil solenoid valve is powered up, indicated by the indicator light D on the graphic panel. The
burner is ignited.
!The ignition transformer remains on for a few seconds after flame ignition (post-ignition time). At the end of this period, it is
cut out of the circuit and indicator light H goes out.
PART II: OPERATION MANUAL

PART II: OPERATION MANUAL 17
Single stage burners front panel
Fig. 15a
Legenda
A Main on/off switch
B Shut down indicator light
D Solenoid valve opening indicator light
F Maximum input operation indicator light
H Ignition transformer operation indicator light
I Thermal cutout tripped indicator light
L Resistors safety thermostat tripped indicator light
M Pre-heat resistor light
Fig. 15b - Flame control device reset button on
burners PN30
FH
L
A
M
D
I
F
B
C

PART III: MAINTENANCE MANUAL18
Carry out the following maintenance operations at least once a year. If the boiler is used seasonally, maintenance should be
carried out at the end of each heating season. If it is used continuously, maintenance should be carried out every six months.
PERIODIC OPERATIONS
!Clean and inspect the oil filter cartridge. Replace if necessary;
!inspect oil hoses; heck for possible leaks;
!clean and inspect filter inside oil pump;
!clean oil filter on pre-heating tank;
!remove, inspect and clean combustion head (see Fig. 16), When replacing, pay scrupulous attention to the measurements
indicated on page 19;
!inspect ignition electrodes and ceramic insulators. Clean and adjust or replace as necessary (see page 19);
!remove and clean oil nozzles (important: clean with solvents only. Do not use metal implements). At the end of maintenance
and after replacing the burner, light the flame and check the shape. If in doubt, replace faulty nozzle. If the burner is used
intensively, you are recommended to replace the nozzle at the beginning of the operating season;
!inspect and thoroughly clean the flame detector photoresistor. Replace if necessary. If in doubt, when the burner is operatio-
nal, check the detection circuit following the diagram in Fig. 19;
Removing the combustion head
N.B. All operations on the burner should be carried out with the main switch off.
!Remove cover C;
!remove the photoresistor from its housing;
!unscrew the rotating coupling on the oil hose
(use two spanners to avoid loosening the
coupling fixed to the distributor block);
!remove the complete assembly L as shown
in the figure.
Note: to replace, follow the above operations in
reverse order.
Fig. 16
Fig. 17
PART III: MAINTENANCE MANUAL
C
L

PART III: MAINTENANCE MANUAL 19
Correct position of electrodes and combustion head
To guarantee efficient ignition, the measurements indicated in Fig. 18a - Fig. 18b must be respected. Make sure the electrode
locking screw is tight before replacing the combustion head.
Fig. 18a
Electrodes correct position Fig. 18c
Fig. 18b

PART III: MAINTENANCE MANUAL20
Checking detection current
To measure the detection signal, follow the diagram in Fig. 19.
If the signal is not within the range indicated, check the electrical
contacts, cleanliness of the combustion head and position of the
photoresistor. If necessary, replace the photoresistor.
Fig. 19
Minimum current intensity with flame: 65 µA 65 µA
Maximum current intensity without flame: 5 µA 5 µA
Maximum current intensity possible with flame:
200 µA 200 µA
34 35
SCALE µA DC
TERMINAL BLOCK