Lamborghini Caloreclima LMB G 1300 Service manual

UNI EN ISO 9001 CERTIFIED COMPANY
LMB G 1300
LMB G 2000
Two-stage progressive/modulating mode gas burner
Installation, use and maintenance manual
GB

2
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The burners have a SPECIFIC WARRANTY starting from the date of validity by the After-sales Service in your
area. Please contact them as soon as possible
WARRANTY
Congratulations on your excellent choice
Thank you for your preference towards our products.LAMBORGHINI CALORECLIMA is a Company that has daily
involvement in the research for innovative technical solutions, able to satisfy all needs. The constant presence of
out products on the Italian and international market is guaranteed by a capillary network of Agents and Authorised
dealers. These are anked by the, “LAMBORGHINI SERVICE” After-sales Services, which ensure qualied assi-
stance and maintenance of the appliance.
Read this manual well as it supplies important indications regarding safety, installation, use and mainte-
nance of the product. Keep it carefully for future reference.Installation must be carried out by qualied
staff in compliance with Technical Standards, national and local legislation in force and the indications
given in the instruction manual supplied with the appliance.
IMPORTANT - burner installation must scrupulously follow the Standards in force, use and purchase stan-
dard components or on request from authorized sales and after-sales centres. The non-fullment of the
same and the failure to comply with that stated, exonerates the manufacturer from any liability.
CONFORMITY
INDEX
Paragraph of interest for the technician
Paragraph of interest for the user
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GENERAL STANDARDS 3
DESCRIPTION 5
TECHNICAL DATA 6
WORK CURVE 6
MAIN COMPONENTS 8
DIMENSIONS 9
VALVES UNIT DESCRIPTION 10
PRESSURE/FLOW RATE CURVES 12
RECEIVING THE PRODUCT 14
BOILER ASSEMBLY 15
GAS CONNECTION 15
VALVES UNIT ASSEMBLY 16
ELECTRIC CONNECTIONS 19
APPLIANCE 21
FUNCTIONING CYCLE 23
USER INTERFACE 27
ACCESS TO THE MENUS 30
REGULATIONS 41
FUNCTIONING CONTROLS 56
MAINTENANCE 59
GAS CONVERSION 62
FUNCTIONING IRREGULARITY 63
The burners comply with:
• 2016/426/EC (Gas Appliances Regulation - GAR)
• 2006/42/EC (Machinery Directive)
• 2014/30/EU (Electromagnetic Compatibility - EMC)
• 2014/35/EU (Low Voltage Directive - LVD)
For the serial number, refer to the technical plate on the burner.

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This manual is an integral and essential part of the product and must be given to the installer. Read the warnings
given in this manual as they supply important indications regarding installation, use and maintenance safety.
Keep this manual carefully for future reference. The burner must be installed in compliance with the Standards
in force, according to the manufacturer’s instructions and by qualied staff Incorrect installation can cause injury/
damage to persons, animals or objects, for which the manufacturer cannot be held responsible.
This appliance must only be destined for the use for which it was expressly declared.Any other use must be con-
sidered improper and therefore dangerous.The manufacturer is not liable for any damage caused by improper,
incorrect or unreasonable use.
Before carrying out any cleaning or maintenance, disconnect the appliance from the mains power supply by acting
on the system switch or via the relevant shut-off elements.
In the case of breakdown and/or bad functioning of the appliance, deactivate it and do not attempt repairs or direct
interventions.
Only contact qualied professional staff.
Any product repairs must only be performed by an after-sales centre authorised by the manufacturer, using original
spare parts.
Failure to comply with the above can compromise appliance safety.
In order to guarantee the efciency of the appliance and its correct functioning, it is indispensable to follow the
manufacturer’s indications. Have qualied professional staff perform periodic maintenance of the appliance.
Whenever the appliance is no longer to be used, the parts that may become a potential source of danger must be
made harmless.
The transformation from one family of gas (natural gas or liquid gas) to another family of gas must only be perfor-
med by qualied staff.
Before commissioning the burner, have qualied staff check:
a) that the plate data are those requested by the gas electricity mains supplies;
b) that burner calibration is compatible with boiler power;
c) that the ow of combustion agent air and the evacuation of ue gases take place correctly according to Stan-
dards in force;
d) that aeration and normal maintenance of the burner are guaranteed.
Every time the gas cock is opened, wait a few minutes before re-igniting the burner.
Before performing any intervention that envisions disassembly of the burner or opening of the inspection access
points, disconnect the electric current and close the gas cocks.
Do not deposit containers of inammable substances in the room where the burner is situated.If you smell gas, do
not activate electric switches. Open doors and windows. Close the gas cocks. Call qualied staff.
The burner room must have openings towards the outside in compliance with local Standards in force. If in doubt
relative to the circulation of air, rst of all we recommend that the CO2value is measured, with the burner functioning
at maximum ow rate and the room ventilated, only via the apertures destined to feed air to the burner and then
by measuring the CO2value again, with the door open.
The value of CO2 measured in both cases must not change in a signicant manner.
If there are more than one burner and fan in the same room, this test must be performed with all appliances fun-
ctioning simultaneously.Never obstruct the air apertures of the burner room, the burner fan intake apertures and
GENERAL STANDARDS U
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any air duct or ventilation grid and external dissipation, with the purpose of preventing: - the formation of toxic/
explosive gas mixtures in the air of the burner room; - combustion with insufcient air, from which dangerous,
costly and polluting functioning occurs.
The burner must always be protected from rain, snow and freezing.
The burner room must always be kept clean and free from volatile substances, which could be sucked inside the
fan and block the interior pipes of the burner and the combustion head. Dust is extremely dangerous, especially if
this can deposit on the fan blades, where it will reduce ventilation and produce pollution during combustion. The
dust an also accumulate on the rear part of the ame stability disc in the combustion head and cause a poor air/
fuel mixture.
The burner must be fed with the type of fuel for which it has been set-up as indicated on the data plate and in the
technical features supplied in this manual. The fuel line that feeds the burner must be perfectly sealed, realised in
a rigid manner with the positioning of a metal expansion joint with ange connection or threaded tting. Moreover,
it must be supplied with all control and safety devices requested by local regulations in force. Pay great care that
no external material enters the line during installation.
Make sure that the electric power supply used for the connection is in compliance with the features indicated on the
data plate and in this manual.Make an electric plant with an effective connection to an earth plant, in compliance
with Standards in force. The earth cable must be a couple of cm. longer that the phase and neutral wire.If in doubt
regarding efciency, it must be checked and controlled by qualied staff.
Never exchange the neutral and phase cables.
The burner can be connected to the mains electricity with a plug-socket connection only if this is equipped in a
way that the coupling conguration prevents the inversion of phase and neutral. Install an omnipolar switch with
opening between contacts of at least 3mm upstream from the appliance as requested by the existing legislation.
The entire electric system and in particular all cable sections, must be suitable for the maximum absorbed power
value indicated on the appliance data plate and in this manual.
If the burner power supply cable is faulty, it must only be replaced by qualied staff.
Never touch the burner with wet body parts or without wearing shoes.
Never stretch (force) power supply cables and keep them away from heat sources.
The length of the cables used must allow the burner and any boiler door to be opened.T
he electric connections must be made exclusively by qualied staff and the regulations in force on the subject of
electricity must be respected.
After all packaging material has been removed, control the contents and ensure that these have not been damaged
in any way during transport.If in doubt, do not use the burner and contact the supplier.
The packaging materials (wooden cages, cardboard, plastic bags, expanded materials, staples, etc...) represent
a form of pollution and potential risk if left everywhere. Collect them and dispose of them in a suitable manner (in
a suitable place).
The entire electric system and in particular all cable sections, must be suitable for the maximum absorbed power
value indicated on the appliance data plate and in this manual.
If the burner power supply cable is faulty, it must only be replaced by qualied staff.Never touch the burner with
wet body parts or without wearing shoes.
Never stretch (force) power supply cables and keep them away from heat sources.

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The length of the cables used must allow the burner and any boiler door to be opened.The electric connections
must be made exclusively by qualied staff and the regulations in force on the subject of electricity must be re-
spected.
After all packaging material has been removed, control the contents and ensure that these have not been damaged
in any way during transport.If in doubt, do not use the burner and contact the supplier.
The packaging materials (wooden cages, cardboard, plastic bags, expanded materials, staples, etc...) represent
a form of pollution and potential risk if left everywhere. Collect them and dispose of them in a suitable manner (in
a suitable place).
DESCRIPTION
They are gas burners with gas/air mixture at the combustion head, with reduced ow rate start-up. The conformation
of the carburisation head allows the use of all natural, mixed and liquid gases (consult the technical after-sales staff
for specic information); the gas/air mixture allows to obtain combustion with low excess air, for high combustion
yields and low emissions of CO and NOx for protection of the environment.
They are suitable for pressurised and low pressure areas, according to the relative work curves. The gas ramp
can be installed on the left or on the right.Inspection can be performed easily and completely through the hinged
opening envisioned between body and burner head, without removing the connection to the gas line.
Automatic functioning with ionisation probe ame control.The burners are envisioned with different sized valves,
to be selected in relation to the gas ow rate requested and the gas pressure (and boiler) available
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TECHNICAL DATA
Model G 1300 G 2000
Type Two-stage progressive or modulating
Functioning Intermittent
Regulation Air/gas proportional valve
Maximum heat output KW 1296 1918
Minimum heat output KW 237 336
NOxclass - 2 2
Gas category - G20 / G30-G31
Maximum gas ow rate (15°C - 1013.5 mbar)-natural gas m3/h 136,5 202
Minimum gas ow rate (15°C - 1013.5 mbar)-natural gas m3/h 25 36,5
Electric protection rating IP 20 20
Motor electric power supply (three phase) V / Hz 400 / 50-60 *400 / 50-60 *
Auxiliary electric power supply (single phase) V / Hz 230 / 50 230 / 50
Max. absorbed power W 2200 3000
Transformer (voltage/secondary current) KV / mA 15 / 48 15 / 48
Functioning temperature (min/max) °C 0 / 40 0 / 40
Noise dbA 85 86
Weight of the burner body (without ramp) Kg 45 48
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0,00
1,00
2,00
3,00
4,00
5,00
6,00
7,00
8,00
mbar
0 200 400 600 800 1000 1200 1400 1600 2000 2200
kW
*It is possible the 60 Hz power supply only with suitable electric motor.
WORK CURVES
Reference parameters for choosing blown air gas burners.
Blown air gas burners can be installed on both pressurised and vacuum boilers. It is essential to always refer to
the ow-pressure working curve as burner ow (expressed in kW) remains strongly linked to the pressure present
in the combustion chamber.
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Example:
Boiler: power to hearth = 1400 kW and
pressure in combustion chamber = 3.0
mbar.
The meeting point between the straight
lines of combustion chamber pressure
and power to the hearth must fall within
the operating range of the boiler (see
example image).
Pressure in the combustion chamber
Flow rate to the boiler furnace

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0,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
16,00
mbar
0 200 400 600 800 1000 1200 1400 1600 1800 2000
kW
0,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
mbar
0 200 400 600 800 1000 1200 1400 1600 1800 2000
kW
G20
G30-G31
G 1300
G 2000
Work curves
The work range was obtained at an ambient temperature of 15°0, at an atmospheric pressure of 1013.5 mbar (at
0 metres above sea-level) and with the adjustments recommended in this instruction.
If the operating point falls within the shaded area, you must insert the gas diaphragm and lock the right air damper
(SEE “ADJUSTMENTS” PARAGRAPH).
Optimal operating range
If the operating point falls within the shaded area, you must insert the gas diaphragm (SEE “ADJUSTMENTS”
PARAGRAPH).
No gearbox is provided for the LPG (B/P) version.
Optimal operating range

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1
2
345 6
21
10 11 12 13
14
15
16
17
18 19
20 7 8 9
P P
22
6
21
22
MAIN COMPONENTS
KEY 1 Motor 2 Control panel 3 Display 4 Inspection hole 5 Air vent lid
6 Gas valve 7 Air servo-motor 8 Control unit 9 Contactor-motor relay 10 Flow nozzle 11 Burner ange 12 Sampling point air
13 Ring regulation 14 Air pressure switch 15 Flange insulation 16 Combustion head 17 Air vent 18 Ionisation electrode 19 Ignition electrode
20 Ignition transformer 21 Minimun gas pres- sure swtch 22 Valve proving system pressure switch P Hinge pins
M

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DIMENSIONS
A B D H FM Fm M
mm mm mm mm mm mm M Vite
G 1300 580 620 232 440 334 294 M12
G 2000 580 620 244 440 334 294 M12
G 1300 VCV-L240
mm
VCV-L350
mm
VGD20
mm
C950 990 1070
hV 340 375 470
G1”1/2 2” 2”
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G 2000 VGD 20.403
mm
VGD 20.503
mm
VGD 40.065
mm
C1070 1070 1050
hV 470 470 480
G2” 2” dN65

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VALVES UNIT M
VCV L valve body
pG pL
pF
VCV L (slow opening)
pF: chamber of
combustion signal
(possible)
Air signal withdrawal
pipe (polyethylene)
Minimum gas pressu-
re pressure switch
(1) Note: installation of the combustion chamber compensation tube is recommended in order to optimise opera-
tion of the valve.
Valve proving system
pressure switch

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VGD 40.
SKP 75
SKP 15
VGD 20.
DUNGS
Made in Germany
DUNGS
Made in Germany
VGD 20 valve body
SKP 75
SKP 15
pF: chamber of
combustion signal
(possible)
(1) Note: installation of the combustion chamber compensation tube is recommended in order to optimise opera-
tion of the valve.
Air signal withdrawal
pipe (polyethylene)
Gas signal withdrawal
pipe (rigid)
Minimum gas pressu-
re pressure switch
VGD 40 valve body
pF: chamber of
combustion signal
(possible)
Air signal withdrawal
pipe (polyethylene)
Gas signal withdrawal
pipe (rigid)
Valve proving system
pressure switch
Valve proving system
pressure switch
Minimum gas pressu-
re pressure switch

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0
5
10
15
20
25
30
40
50
500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200
kW
mbar
2 1
2
2
1
1
3
3
3
1250 1300
4
4
4
PG
Pt
Pe Pv
CT
VCV 240 (inlet pressure) VCV 350 (inlet pressure) VGD 20.403 (inlet pressure) VGD 20.503 (inlet pressure) Pv (pressure downstream of the ramp)
0
5
10
15
20
25
500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200
kW
1250 1300
mbar
4
4
VGD 20.503 (inlet pressure) Pv (pressure downstream of the ramp)
NATURAL GAS
LPG
PRESSURE/FLOW RATE CURVES G 1300
They indicate the gas pressure in mbar, (in the various points of the gas ramp) necessary to obtain a determined
ow rate in m3/h. The pressures are measured with the burner functioning and are intended with combustion
chamber at 0 mbar. If the chamber is pressurised, the gas pressure necessary will be that of the diagram plus the
value of that of the chamber.
M
Pe = Pressure upstream from the valves unit
Pt = Pressure at the combustion head
Pv = Pressure downstream of the ramp
PG = Minimum gas pressure pressure switch
CT = leak-tightness pressure switch
ATTENTION: the Pt-Pv gas pressure outlets have a screw closing pin. Ensure that the Pt - Pv gas outlets
are closed during normal operation.
NOTE: For reducer positioning (gas diaphragm) see GAS DIAPHRAGM POSITIONING” paragraph.
With reducer d. 30 mm Without reducer
With reducer d. 30 mm Without reducer

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0
5
10
15
20
25
30
35
40
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
mbar
kW
1
4
55
3
2
1
2
3
4
PG
Pt
Pe Pv
CT
VCV 350 (inlet pressure) VGD 20.403 (inlet pressure) VGD 20.503 (inlet pressure) VGD 40.065 (inlet pressure) Pv (pressure downstream of the ramp)
0
5
10
15
20
25
30
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
mbar
kW
VGD 40.065 (inlet pressure) Pv (pressure downstream of the ramp)
NATURAL GASLPG
PRESSURE/FLOW RATE CURVES G 2000
They indicate the gas pressure in mbar, (in the various points of the gas ramp) necessary to obtain a determined
ow rate in m3/h. The pressures are measured with the burner functioning and are intended with combustion
chamber at 0 mbar. If the chamber is pressurised, the gas pressure necessary will be that of the diagram plus the
value of that of the chamber.
M
ATTENTION: the Pt-Pv gas pressure outlets have a screw closing pin. Ensure that the Pt - Pv gas outlets
are closed during normal operation.
NOTE: For reducer positioning (gas diaphragm) see GAS DIAPHRAGM POSITIONING” paragraph.
Pe = Pressure upstream from the valves unit
Pt = Pressure at the combustion head
Pv = Pressure downstream of the ramp
PG = Minimum gas pressure pressure switch
CT = leak-tightness pressure switch
With reducer d. 30 mm

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RECEIVING THE PRODUCT
The burner is supplied protected by cardboard or cardboard/wood packaging.
WARNING
The instruction manuals are an integral part of the appliance and therefore must be read before installing and
starting the burner and must be kept with care.
The documents envelope, positioned inside the packaging, contains the following material:
- Installation and maintenance book
- Warranty certicate
- Spare parts exploded diagram
HANDLING RECOMMENDATIONS
• Handling must be performed by qualied staff;
• Use suitable accident-prevention equipment;
• It is prohibited to disperse of packaging material in the environment or leave it within the reach of children as:it
can be a potential source of danger. It must therefore be disposed of in compliance with that established by the
lawin force;
• The place of installation must be without dusts, objects or inammable materials or corrosive gases.
RECOMMENDATIONS FOR USE
To prevent injury/damage to persons and the environment in which the appliance is used, the following notes must
be complied with!
• Do not open, tamper with or modify the appliance
• Before making any modications to the connections of the appliance, completely isolate the unit from the mains
power supply.
• Suitably protect the appliance terminals in order to prevent any contact with them.
• Make sure that the appliance is connected correctly (see CONNECTION LAYOUT). Incorrect connection can
damage the appliance and the place of use.
• Falls and mechanical stress can damage some safety functions. In this case, do not install the appliance even
if there is no visible damage.
RECOMMENDATIONS FOR INSTALLATION
• Installation must be carried out by specialised staff. The Standards in force must be respected.
• The place of installation must be without dusts, objects or inammable materials or corrosive gases.
• Keep the ignition cable separate from the other connection cables of the appliance.
• The protection fuse must respect that indicated in the technical data. If this does not take place, serious damage
can be caused to the appliance and room by a short circuit.
• When checking the components (motor, solenoid valves, etc…) outside the control appliance, the latter must not
be connected.
• Check that the maximum load supported by the output terminals is not exceeded.
NOTES FOR REPLACEMENT OF THE APPLIANCE
• Every time the appliance is replaced, check connections and safety functions
• The appliance is made up from electric and electronic components; therefore it must be disposed of in complian-
ce with local Directives in force.
NOTES FOR READING THE DATA PLATE
- The data plate is placed on the instrument panel of the burner.
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Reg.
**
***
******
PIN******
98003961
AAAAAAAAA
Cod.
152-979
kW
II2R3R
********
Mat.
1200W
230V-50Hz
IP5XD
000000000000
Made in Italy
LAMBORGHINI CALOR SPA - VIA STATALE 342, CP.46 - 44047 - DOSSO (FE)
Q
Cat.
09\2014
Product code
Flow rate burner
Gas category
Regulation
Omologation number
Name
Registration number
Electrical data

15
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pG pL
pF
L
Fm
FM M
D
D L FM Fm M
mm mm mm mm M Vite
G 1300 232 340 334 294 M12
G 2000 244 340 334 294 M12
BOILER ASSEMBLY
The burner is xed by the ange, placing the supplied insulated gasket between the plate and the boiler. For drilling
of the boiler and positioning of the fastening screws, refer to the diagram.
Insulating gasket
L = Useful entrance lenght ow nozzle
M
The system must be complete with the accessories prescribed by the Standards: do not exert mechanical stress
on the components.
Also, keep the spaces requested for maintenance of the burner and boiler in mind.
On request, it is possible to order the ACCESSORIES UNIT KIT, composed of the anti-vibration joint and gas ball
cock.
GAS CONNECTION M

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VALVES UNIT ASSEMBLY M
c
M12 x 20 screws
Fig. A
T
S
Fig. B
Pt
a
pL
Pv
Make sure that the ne-
edle tapping point Pt
is closed.
The valves unit can also be positioned on the left of the burner..
Connect the supplied air withdrawal polyethylene pipe (T) to the connection pL on the VCV valve and on the
quick coupling (S) of the burner (g.B)
VCV L (slow opening)
To x the valves unit (g. A) to the burner, use the 4 washers (a) and the 4 M12 x 20 screws supplied with the
valves unit, paying attention that the cork/rubber gasket (c) is positioned correctly and there are no gas leaks in
the coupling.
Gas pipe
Make sure that the ne-
edle tapping point Pv
is closed.

17
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VGD 20....
To x the valves unit (g. A) to the burner, use the 4 washers (a) and the 4 M12 x 20 screws supplied with the
valves unit, paying attention that the cork/rubber gasket (c) is positioned correctly and there are no gas leaks in
the coupling.
M12 x 20 screws
Connect the supplied air withdrawal polyethylene pipe (T) to the connection R1 on the SKP75 valve and on the
quick coupling (S) of the burner (g.B)
S
Fig. B
Make sure that the ne-
edle tapping point Pt
is closed.
Pt
Gas pipe
DUNGS
Made in Germany
c
Fig. A
T
a
pG
R2
R1
H
R1
The valves unit can also be positioned on the left of the burner..
Fig. A

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GB
c
Vite M12 x 20
Fig. A
T
S
Fig. B
Pt
Gas pipe
a
pG
R2
R1
H
R1
VGD 40....
To x the valves unit (g. A) to the burner, use the 4 washers (a) and the 4 M12 x 20 screws supplied with the
valves unit, paying attention that the cork/rubber gasket (c) is positioned correctly and there are no gas leaks in
the coupling.
Fig. A
Connect the supplied air withdrawal polyethylene pipe (T) to the connection R1 on the SKP75 valve and on the
quick coupling (S) of the burner (g.B)
Make sure that the ne-
edle tapping point Pt
is closed.
The valves unit can also be positioned on the left of the burner..

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ELECTRIC CONNECTIONS
L1 L2 L3
L
N
LB
PS N
Q14 Q13 LMY1 Q NB1
Y2 GRWF
M
L1 L2 L3
L
N
LB
PS N
TC
Tmf
KEY
L Line
N Neutral
L1 Three phase line
L2 Three phase line
L3 Three phase line
PS Release button
LB Lock out lamp
TC Boiler thermostat
Tmf Modulating thermostat ame
RWF CONNECTION
TERMINAL BOARD CONNECTION
READ THE GENERAL STANDARDS ON PAGE 3 CAREFULLY
- NEUTRAL TO EARTH: in the case of power supply mains with NEUTRAL CONNECTED TO EARTH connect
the mains power supply NEUTRAL to the appliance NEUTRAL.
- INSULATED NEUTRAL: in the case of mains power supply with INSULATED NEUTRAL it is necessary to use
an insulation transformer. Connect a terminal of the insulation transformer secondary to the appliance EARTH
and NEUTRAL.Now connect the other terminal of the transformer secondary to the appliance LINE.
- PHASE-PHASE: in the case of PHASE-PHASE mains power supply, it is necessary to use an insulation
trasformer. Connect a terminal of the insulation transformer secondary to the appliance EARTH and NEU-
TRAL.Now connect the other terminal of the transformer secondary to the appliance LINE.
- The cable to be used for the 230/400V power supply must be H05W-F type with cross-section of 1.5 mm2

20
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TR
Marrone L=200
Nero L=300
Nero 1x1,5 L=100
Viola L=100
Blu L=200
Rosso L=280
Blu L=200
Blu L=100
Arancio L=100
Grigio L=200
Bianco L=100
Rosso L=300 Bianco L=300
Blu L=200
Bianco L=200
Viola L=200
Arancio L=200
Grigio L=200
Rosso L=200 Blu L=300 Nero L=300
CT
Nero L=200 Nero L=200
3 G/V
3 G/V
1 G/V
2 G/V
Marrone L=300 Bianco L=300
Nero 1x1,5 L=100 Nero 1x1,5 L=100
Grigio L=200
Blu
Nero
1
2
L1 L2 L3
L
N
LB
PS N
CE
RT
CO
M
4 G/V
PA
PG
3
VE
12
34
12
34
MS
TC
Tmf
KEY
L Line
N Neutral
L1 Three phase line
L2 Three phase line
L3 Three phase line
M Burner motor
RT Circuit breaker switch
TR Ignition transformer
MS Servo-motor
PG Gas pressure switch
PA Air pressure switch
CE Control unit
CO Motor contactor
CT Sealing control (optional)
PS Release button
LB Lock out lamp
TC Boiler thermostat
Tmf Modulating thermostat ame