Unigas HP60 User manual

1
MANUAL OF
. INSTALLATION
. OPERATING
. MAINTENANCE
DUAL FUEL
GAS AND LIGHT OIL
BURNERS TYPE:
HP60
HP72
FOREWORD P. 2
PART I: INSTALLATION P. 4
PART II: OPERATIONS P. 18
PART III: MAINTENANCE P. 20
APPENDIX P. 26
M03957CA Rev.00 Ed.04/96
BURNERS
BRULEURS
BRENNER
QUEMADORES
BRUCIATORI

2
GENERAL INTRODUCTION
* This instruction sheet is supplied as an integral and essential part of the
product and must be delivered to the user.
Carefully read these instructions, as they supply important information on
installation, use, safety and maintenance.
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 heating systems and sanitary hot water generation
and, in particular, 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 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 manufactureer, 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 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 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 fitted 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 and 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 ventilation 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 gasoil, or other fuel).
*Observe caution with hot burner components. These, are usually near to
the flame and the fuel pre-heating system, if any become hot during the unit
operation they 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 cable from
the master
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 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 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 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
PREFACES
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.
- CAREFULLY KEEP THIS MANUAL FOR FUTURE REFERENCE.

3
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 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 observance of a few
basic rules, for example:
- do not touch the unit with wet or damp parts of the body and/or with
bare feet;
- do not pull electric cables;
- do not leave the equipment exposed to weather (rain, sun, etc.)
unless expressly required to do so;
- do not allow children or inexperienced persons to use equipment;
* The unit input cable shall not be replaced by the user.
In case of damage to the cable, switch off the unit and contact qualified
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.
/cont’ d...
3B FIRING WITH GAS, GASOIL OR OTHER FUELS
GENERAL
* The burner shall be installed by qualified personnel and in compiance 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 and pressure soundness;
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
equippped 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 currrent 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 close the gas
valve.
* In case of prolonged absence of the user, the main gas delivery valve to
the burner should be closed.
PREFACES
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.

4
PART 1: INSTALLATION MANUAL
TECHNICAL DATA
BURNER TYPE HP60 HP72
Input min. (gas) kW 170 330
min. (oil) kW 250 410
max. kW 880 1.550
min. (gas) kcal/h 146.200 283.800
min. (oil) kcal/h 215.000 352.600
max. kcal/h 756.800 1.333.000
Fuel Natural Gas - Light Oil Natural Gas - Light Oil
Category I2ELL I2ELL
Max. oil viscosity (°E a 20°C) 1.8 1.8
Gas flow rate (min-max) (St m3/h) 18 - 93.1 34.9 - 164
Light oil flow rate (min-max)kg/h 21 - 74 34.5 - 130.5
Electric supply 230/400 V - 50 Hz 230/400 V - 50 Hz
Electric comsuption kW 2.15 3.25
Fan motor kW 1.1 2.2
Amperes (230/400) A 5 - 2.9 8.1 - 4.7
Pump motor kW 0.55 0.55

5

6
FIRING RESISTANCE IN C.D.C. mbarFIRING RESISTANCE IN C.D.C. mbar
PERFORMANCE CURVES
INSTALLATIONMANUAL
C.D.C. = COMBUSTION CHAMBER
= lower limit of oil burner performance curve.
Fig. 2
Fig. 3
-1
0
1
2
3
4
5
6
7
0 200 400 600 800 1000
-2
0
2
4
6
8
10
12
0 200 400 600 800 1000 1200 1400 1600
HP60
HP72
INPUT kW
INPUT kW

7
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.
MOUNTINGS AND CONNECTIONS
Rotation of fan motor and oil pump motor
After completing the electrical connection of the burner, remember to check the rotation of the fan motor and the oil pump
motor. Both motors should rotate in an anti-clockwise direction looking at cooling fan of the motor. In the event of incorrect
rotation reverse the three-phase supply and recheck the rotation of the motor.
NOTE. the burners are supplied for three-phase 400 V supply, and in the case of three-phase 230 V supply it is necessary to
modify the electrical connections inside the terminal box of the electric motor and replace the thermal overload relay.
Fig. 4
Legend
1) Burner
2) Fixing nut
3) Washer
4) Seal
5) Stud bolt
6) Sightglass cleaning tube
7) Blast tube
INSTALLATIONMANUAL
Packing
The burners are despatched in cardboard packages of dimensions:
HP72 1400 - 1190 - 710 mm ( “““)
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 which is detached but already connected to the burner electrically ;
1 gasket made of asbestos-free material to be inserted between the burner and the boiler;
2 flexible light oil tubes;
1 light oil filter;
1 set of the following documents: this manual, the Guarantee Certificate and the test certificate.
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
Fitting burner to 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 (ceramic fibre cord or refractory cement).
Electrical connection diagram
- Remove the cover of the electrical panel beside the burner.
- Effect the electrical connections to the supply terminal board as per the scheme in fig. 5, check the direction of
rotation of the fan motor (see note at end of page) and refit the panel cover.
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 that ground wire should be longer than
phase and neutral ones.
Legend: see page 20.
Fig. 5

8INSTALLATIONMANUAL
Gas train installation diagrams
In fig. 6 they are shown all the components of the gas train included in the supply and those which must be fitted by the
installer. The scheme shown satisfy the current provisions of the law .
124
35
LEGEND
1) Burner
2) Gas twin valve (including gas
pressure switch)
3) Leak detection monitor (Optional on
type HP60)
4) Gas governor and filter
5) Manually Operated Shutt-off Valve
Size: see technical data - gas
connection
SUPPLIER INSTALLER
Fig. 6
SPECIAL REQUIREMENTS FOR APPLICATIONS ON STEAM BOILERS
Burners installed on steam boilers must comply with TRD regulations, they shall always be equipped with:
- leak detection monitor,
- continuous service burner control box,
- maximum gas pressure switch.
When ordering the burner remember to specify if such equipment is required.
Light Oil tubing installation diagram
Key:
1) Burner
2) Flexible tubing (kit)
3) Gas filter (kit)
4) Automatic interceptor (*)
5) One-way valve (*)
6) Gate valve FROM TANK
7) Quick-closing gate-valve
(not in vicinity of tank or boiler) TO TANK
(*) Only for installations with gravity, siphon
or forced circulation feed systems.
Examples of light oil feed systems
Gravity feed system
Key:
1) Manual interceptor valve
2) Gas filter
3) Light Oil feed pump
4) One way valve
5) Light Oil flexible tubing
6) Spillage valve
1 2 3 4
1 2 5
4 5
Fig. 7
Fig. 8

9
INSTALLATIONMANUAL
1 2 3 1 2 5
6 4 5
1 2 5
5
4
Ring system
Key:
1) Manual interceptor valve
2) Gas filter
3) Light Oil feed pump
4) One way valve
5) Light Oil flexible tubing
6) Spillage valve
Suction system
Monotube systen
The burners leave the factory equipped
for twin-tube feed.
They can be adapted for a mono-tube
system (recommended in the case of
gravity feed). Refer to the Appendix for
details of how
to do this.
Fig. 9
Fig. 10

10 INSTALLATIONMANUAL
Fig. 12
LC LB C - RP T
Double valve Dungs DMVDLE
It is a single body valve assembly includung two class A
electric gas valves. One of them is slow opening type.
The valve assembly can be coupled with leakage control
Dungs mod. VPS504.
To set gas flow rate use screw RP, under cover C. Clockwise
rotationreduces flow rate, counterclock wise rotation increases
it.
To set slow opening remove cover T, reverse upside down and
use it as a tool to rotate screw WR. Clockwise rotation reduces
start flow rate, counter clockwise rotation increase it.
Dungs valve leakage monitor device VPS504
The VPS504 check the operation of the seal of the gas shut off
valves costituting the DMV-DLE. This check, carried out as
soon as the boiler thermostat gives a start signal to the burner,
creates, by means of the diaphragm pump inside it, a pressure
in the test space of 20 mbar higher than the supply pressure.
When wishing to monitor the test, install a pressure gauge
ranged to that of the pressure supply, point Pa. If the test cycle
is satisfactory after a few seconds the consent light LC
(yellow) In comes on. In the opposite case the lockout light LB
(red) comes on. To restart it is necessary to reset the appliance
by pressing the lamp/button LB.
ADJUSTMENT
MVDLE gas valve
To adjust the gas flow rate loosen the screw VB and rotate the regulator RP as
necessary. Flow decreases with tightening and increases with unscrewing. Tighten
screw VB. For adjusting the speed of operation, remove the cap T, turn it over
and fit on the pin VR with the appropriate spline placed on the upper part. By
tightening it the starting flow rate decreases. By slackening it the starting flow
rate increases. N.B. The screw VSB must only be removed for replacement of
the coil. Do not adjust the screw VR with a screwdriver.
MVD gas valve
To adjust the gas flow unscrew the plug T, slacken the lock nut and apply a
screwdriver to the adjusting screw VR. By turning in the clockwise direction the
flow is reduced and by turning in the anticlockwise direction it is increased. When
this operation has been completed lock the lock nut and screw down the plug T.
To replace the coil remove the plug T, withdraw the coil B and after replacing the
coil refit the plug T.
PE PA Fig. 11
Fig. 13

11
INSTALLATIONMANUAL
LANDIS gas valve
Version with SPK10: no adjustment necessary.
- Important: Do not remove the cover as oil may leak out.
Version with SKP20: (with built in pressure stabiliser).
- To increase or decrease gas pressure, and therefore gas flow, remove the cap
and use a screwdriver to adjust the regulator screw VR. Turn clockwise to increase
the flow, anti-clockwise to reduce it.
- Connect up the gas tubing to the gas pressure nipple (TP in Fig.14).
- Leave the breather free (SA in Fig.14).
- Should the spring that is fitted not permit satisfactory regulation, ask one of our
service centres for a suitable replacement.
VR
SA
TP
Fig. 14
Leak Detection KROM SCHRODER TC218
This device checks the closure of the gas valves by acting directly on them
according to a sequence controlled by an electronic programme. The device
includes light signals (LEDs) to indicate the phase of the cycle of operation and
which solenoid valve is leaking. If a momentary loss of voltage occurs during the
test the system automatically starts up again. If that happens during a test failure
both LEDs light up.
Legend of Light Signals
A- Test in progress
B- Regular operation
C- Loss of upstream solenoid valve (EV1)
D- Loss of downstream solenoid valve (EV2)
PS - reset Button Fig. 15
TR
Fig. 16
Pressure Governor
To increase the gas pressure on outlet, adjust with a screwdriver screw TR as
indicated in figure 16.

12 INSTALLATIONMANUAL
1
233
5
6
7
8
33
4
1
2 3 3
4
5
6
7
8
33
Key:
1) Oil pump
2) Min oil pressure switch
3) Oil electrovalve
4) Nozzle
5) Adjustable cam
6) Pressure regulator
7) Manometer
8) Max oil pressure switch
To prime the pump
Before starting to regulate for light oil operation it is necessary to prime the light oil pump using the following procedure:
- turn on the burner; when the electrovalve comes on switch on the light resistor and clear the air out of the manometer
connection. Before starting up the burner make sure that the tube leading back to the tank is not obstructed. Any blockage
could lead to failuer of the pump seal.
To regulate the light oil flow
To adjust the light oil flow select a nozzle (reflux type) of approapriate size and calibrate the delivery and return pressure using
the information in Tab.1(see Fig.17 for an outline diagram of the light oil circuit); for correct nozzle size refer to the tables in the
Appendix.
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NOZZLE
BRAND
DELIVERY
PRESSURE
bars
MAX. BACK
PRESSURE
bars
MIN. BACK
PRESSURE
bars
MIN/MAX
RATIO
BERGONZO A3 20 13-19* 3 1/3
MONARCH BPS 21 21 3-4 1/3
FLUIDICS K3 30 21 5 1/4
FLUIDICS KC2 20 15 3 1/4
* For the flow at different pressure levels see the tables in Appendix.
Fig. 17
Fig. 18

13
Fig. 19
Fig. 21
To regulate the delivery pressure adjust the pump regulator screw following the instructions given on page 14.
See Appendix for further details about the light oil pump.
To calibrate back pressure adjust the screws V on the variable sector switch (Fig.21).
INSTALLATIONMANUAL
1
2 3 3
4
5
6
7
8
33
2 3 3
4
5
6
7
8
33
1
Key:
1) Oil pump
2) Min oil pressure switch
3) Oil electrovalve
4) Nozzle
5) Adjustable cam
6) Pressure regulator
7) Manometer
8) Max oil pressure switch
Fig. 20

14
Fig. 22
Fig. 23
Oil pumps
Suntec AJ6CC pump
(for type HP60)
Suction: max. 0,5 bars - maximum
recommended depression
to avoid formation of
air bubbles: 0,35 mbars
Velocity max. 3600 rpm
Operational viscosity: 2,7-75 cSt
Intake & back pressure: 2 bars
Suntec E7NC pump
(for type HP72)
Suction: max. 0,5 bars - maximum
recommended depression to
avoid formation of air
bubbles: 0,35 mbars
Velocity: max. 3600 rpm
Operational viscosity: 2,8 - 200 cSt(J6CCC)
2,8 - 800 cSt(E7NC)
Intake & back pressure: 0,7 bars
Key:
1) Suction 4) Pressure regulator
2) Feedback 5) Vacuum gauge connection
3) Delivery to nozzle 6) Pressure gauge connection
INSTALLATIONMANUAL

15
INSTALLATIONMANUAL
ADJUSTMENT OF GAS AND AIR FLOW RATE
NOTA BENE: During commissioning operations, do not let the burner function with insufficient air flow (danger of formation of
carbon monoxide); if this should happen, shut down the burner, increase the opening of the air damper and start up the burner
again to ensure the purging of the carbon monoxide from the combustion chamber.
Fig. 26
VVRA
VRA
RA
- During testing in the facory the gas butterfly valve, air damper and oil
nozzle pressure at low flame and the servo-control cams set accordingly.
- To recalibrate the burner at the time of on-site testing, employ the
following procedure.
1. Light the gas burner and keep the servo-control in the ignition position by
using the AUTO-MAN on the servo-control switch (ignition position = 0°).
2. To regulate the ignition air flow move the servo-control cam AB (see
fig.24) (to increase air flow increase servo- control position angle). To
regulate the ignition gas flow turn the adjustable screws V (see fig. 26) to
change the opening of the butterfly valve (see Fig.25). Turn clockwise to
increase the gas flow and anti-clockwise to reduce it.
3. Switch off the burner, put the AUTO-MAN servo-control switch in AUTO
position and start the burner again. If the setting is correct proceed to point
4, on the contrary correct it again.
4. With the servo-control switch in MAN position turn the servocontrol up to
high flame (servo-control position = 90°).
IMPORTANT NOTICE: move the servocontrol by hand slowly, taking
care to combustion values in order to be sure not to let the burner function
with insufficient air flow. Regulate the gas flow to the required figure by
adjusting the pressure stabilizer or the regulator valve (see page 10). To
adjust the air flow rate slacken the screw RA and rotate the screw VRA
(CW rotation increases air flow, while CCW rotation decreases it) until the
desired flow rate is obtained. (fig. 26).
5. Turn the burner down to low flame, to regulate the gas flow act on the
adjustable screws V as described at point 2.
6. Should it be necessary to adjust burner capacity at low flame move the
servocontrol cam BF accordingly (see Fig.24). The low-flame position
should never coincide with the ignition position, so for this reason the
cam has be calibrated at least 5°off the ignition position.
7. Put the AUTO-MAN servo-control switch in AUTO position and check
burner starting again, if gas or air flow need further adjustment proceed
as described at point 2.
8 Light the oil burner. Should it be necessary to adjust the oil ignition flow
move the adjustable screws as shown in fig. 21.
9 With the servo-control switch in MAN position , turn the servocontrol up
to high flame following the same precautioni described at point 4. Turn
the servocontrol switch to “AUTO”position and regulate the oil flow by
means of “V”screws, see fig. 21.
10 Turn the burner down to low flame, check combustion, if necessary
regulate the oil flow by adjusting the screws “V”(see fig. 21).
N.B. On final adjustment, make sure the locking screw RA is fully tightened.
BF AB Fig.24
Fig. 25

16 INSTALLATIONMANUAL
Calibration of air pressure switch
Calibration is carried out as follows:
Remove the transparent plastic cap.
After air and gas setting has been completed , start the burner and,
while prepurge phase is running, slowly turn the adjusting ring nut VR
in the clockwise direction until the burner lockout (on the Elbi pressure
switch undo screw VB).
Read the value on the pressure switch scale and reduce it by 15%.
Repeat the ignition cycle of the burner and check it runs properly.
Refit the cover on the pressure switch (on Elbi pressure switch
remember to tighten screw VB).
Fig. 27
Calibration of minimum gas pressure switch
The minimum gas pressure switch is fitted to the multibloc valve unit.
Calibrations is carried out as follows:
Remove the transparent plastic cover .
With the burner in operation measure the pressure on the pressure port
on pressure switch and close the shut off valve (n°4 in installation
diagram) slowly until the detected pressure is reduced by 50%.
Verify CO emissions of the burner, if the measured value is smaller than
80 ppm screw down the adjusting ring nut until the burner is turned off
(on the Elbi pressure siwtch undo screw VB.
If CO emissions are greater than 80 ppm slightly open the shut off valve
until the CO value is reduced below 80 ppm, then screw down the
adjusting ring nut until the burner is turned off.
Fully open the valve n°4.
Refit the cover on the pressure switch (on Elbi pressure switch
remember to tighten screw VB).
Calibrating the high gas pressure switch
The high gas pressure switch is fitted on the burner close to the butterfly
valve and is connected by copper tube.
For calibration proceed as follows:
Remove the transparent plastic cover
Bring the burner to maximum output
Rotate the adjustment ring nut VR clockwise, until the burner stops
(on the Elbi pressure siwtch undo screw VB).
Rotate the adjustment ring nut slightly back (increase the value
indicated on the scale nut after rotation by 30 % ).
In the event of stoppage rotate the adjustment ring nut slightly further
back.
Refit the cover (on Elbi pressure switch remember to tighten screw
VB)
Fig. 28

17
INSTALLATIONMANUAL
Adjustment of combustion head
The burner is adjusted in the factory with the head in the position “MAX”, corresponding to maximum output. When operating at
reduced power progressively move the combustion head to the positions indicated in the table following
N.B. On burner type HP72 loosen the screw VB before adjusting and tighten it up again afterwards.
COMBUSTION BURNER INPUT (kW)
HEAD
POSITION HP60 HP72
From To From To
3 450 - 880 850 - 1550
2 400 - 450 750 - 850
1 350 - 400 700 - 750
0 < 350 < 700

18
PART II: OPERATIONS MANUAL
OPERATIONS MANUAL
LIMITATIONS OF USE
THE BURNER IS AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEING
CORRECTLY CONNECTED TO A HEAT GENERATOR (E.G. BOILER, HOT AIR GENERATOR, FURNACE,
ETC.), ANY OTHER USE IS TO BE CONSIDERED IMPROPER AND THEREFORE DANGEROUS.
THE USER MUST GUARANTEE THE CORRECT FITTING OF THE APPLIANCE, ENTRUSTING THE
INSTALLATION OF IT TO QUALIFIED PERSONNEL AND HAVING THE FIRST COMMISSIONING OF IT
CARRIED OUT BY A SERVICE CENTRE AUTHORISED BY THE COMPANY MANUFACTURING THE
BURNER. A FUNDAMENTAL FACTOR IN THIS RESPECT IS THE ELECTRICAL CONNECTION TO THE
GENERATOR’S CONTROL AND SAFETY UNITS (CONTROL THERMOSTAT, SAFETY, ETC.) WHICH
GUARANTEES CORRECT AND SAFE FUNCTIONING OF THE BURNER.
THEREFORE ANY OPERATION OF THE APPLIANCE MUST BE PREVENTED WHICH DEPARTS FROM THE
INSTALLATION OPERATIONS OR WHICH HAPPENS AFTER TOTAL OR PARTIAL TAMPERING WITH THESE
(E.G. DISCONNECTION, EVEN PARTIAL, OF THE ELECTRICAL LEADS, OPENING THE GENERATOR DOOR,
DISMANTLING OF PART OF THE BURNER).
DO NOT EVER OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE.
OPERATE ONLY THE MAIN SWITCH (“ON-OFF” SEE FIG. 31), WHICH THROUGH ITS EASY ACCESSIBILITY
AND RAPIDITY OF OPERATION ALSO FUNCTIONS AS AN EMERGENCY SWITCH, AND ON THE RE-SET
BUTTON.
IN THE EVENT OF REPEATED LOCKOUTS, DO NOT PERSIST WITH THE RE-SET BUTTON AND CONTACT
QUALIFIED PERSONNEL WHO WILL PROCEED TO ELIMINATE THE MALFUNCTION.
WARNING: DURING NORMAL OPERATION THE PARTS OF THE BURNER NEAREST TO THE GENERATOR
(COUPLING FLANGE) CAN BECOME VERY HOT, AVOID TOUCHING THEM SO AS NOT TO GET BURNT.
OPERATION
- Select the fuel by turning the switch A on the burner control panel.
N.B. where light oil is used make sure than the interceptor valves on the feed and return tubes are turned on.
- Check that the mechanism is not blocked (LED B lights up), if it is reactivate it by pressing the reset button C.
- Check that the series of thermostats (or pressostats) gives the all clear for operating the burner.
Gas Operation
- Check that the gas feed pressure is high enough (LED D will come on).
- Start the checking cycle for the gas-tight monitor of the gas valves. When the check is completed the gas-tight monitor LED
will light up on the control panel. When the gas valve check is completed the burner start-up cycle begins.
- At the beginning of the start-up cycle the servo control operates the air damper to maximum opening and the fan motor
starts and the pre-purge phase begins. During the pre-purge phase the complete opening of the air damper is signalled by
the lighting of the indicator light F on the front panel.
- At the end of the pre-purge the air damper is brought to the ignition position, the ignition transformer is energised (signalled
by indicator light H on the panel) and, after 3 sec., the two gas valves EV1 and EV2 are energised (indicator lights I and L
on the mimic panel). 3 seconds after the opening of the gas valves the ignition transformer is de-energised and the light H
is extinguished.
- The burner is firing in low flame (indicator light G lit up); after 14 sec. 2-stage operation initiates and the burner is brought
automatically into high flame, or remains in low flame according to the requirements of the plant. Operation in high or low
flame is signalled by the lighting up/extinguishing of the indicator light F on the mimic panel.
Light Oil operation
- The ventilation motor comes on and the pre-ventilation phase begins. Since the pre-soak cycle must be carried out with
maximum air flow the monitor only switches on the servo-control once the damper is fully open which in turn signals the start
of the pre-ventilation time period lasting 36 seconds.
- At the end of the pre-ventilation period the servo-control moves to the light oil ignition position, and as soon as is reaches this
position the ignition transformer comes on (indicated by LED I on the display panel). Two seconds after the light oil valve opens
the ignition transformer is cut out of the circuit and LED I goes out.
- This lights the burner, and at the same time the servo control moves to the high-flame position, and after 14 seconds it moves
into 2 stage mode and the burner either turns up automatically to high flame or remains on low flame as the system demands.
High or low flame operation is indicated by whether the LED G on the display panel is on (high) or off (low).

19OPERATIONS MANUAL
Key:
A: Main on/off switch
B: LED indicating burner blocked
C: Re-set button for burner monitor
D: LED indicating gas pressostat all-clear
E: LED indicating valve gas-tight monitor blocked
F: Reset button for valve gas-tight monitor (only for burners fitted with LANDIS LDU11 monitor.
G: LED indicating high-flame operation
H: LED indicating low-flame operation
I: LED indicating ignition tramnsformer working
L: LED indicating thermal relay on
M: LED indicating gas valve EV1 on
N: LED indicating gas valve EV2 on
O: LED indicating Stand-by mode.
P: LED indicating light oil valves on
Q: Automatic-manual control of burner CAPACITY (only on fully modulating models)
R: LANDIS RWF32.00 (only on fully modulating models).
Fig. 31
Front panel
GH I
L
B
O
P
D
NM
E
CF
AQ
R

20
PART III: MAINTENANCE MANUAL
MAINTENANCEMANUAL
At least once a year carry out the maintenance operations listed below. In the case of seasonal servicing, it is recommended to
carry out the maintenance at the end of each heating season; in the case of continuous operation the maintenance is carried out
every 6 months.
N.B. All operations on the burner must be carried out with the power disconnected
PERIODICAL SERVICING
- Clean and examine the gas filter cartridge and replace if necesssary;
- Clean and examine the light oil filter cartridge and replace if necessary;
- Examine the condition of the light oil flexible tubing and check for possible leaks.
- Clean and examine the filter inside the light oil pump (see instructions in the Appendix).
- Dismantle and clean the combustion head (see Fig.45-6).
- Examine and clean the ignition electrodes, adjust and replace if necessary (see Fig.47).
- Dismantle and clean the light oil nozzle (Important: use solvents for cleaning, not metal utensils), and at the end of the
maintenance procedures, after replacing the burner, light it and check the shape of the flame and if in doubt replace the nozzle;
where the burner is used intensively it is recommended that the nozzle be replaced as a preventive measure at the start of the
operating season;
- Clean and degrease joints and rotating parts.
IMPORTANT: Remove the combustion head before checking the ignition electrodes.
To remove the combustion head
Type HP60
Remove the cap H.
Slide the UV photoelectric cell out of its
housing.
Undo the screw VR to free the threaded
rod C (first undo the two screws S
holding the head regulation screw in
place, then the screw VR).
Undo the locking screws V hold the
gas-collector,loosenthetwo connectors
E and remove the whole assembly as
shown in
Note: to replace the combustion head
reversethe procedure describedabove.
V
S
Fig. 32