CMT L Series Technical manual

Rev.5 del 22/07/2021 Pag. 1 | 65
USE, INSTALLATION AND
MAINTENANCE MANUAL
CONDENSING WARM AIR HEATERS SERIES
L - LO – LE – LEO - LP
HEATING SECTION SERIES LR
fitted with automatic forced draught gas fired or fuel oil fired low NOx burner
ENGLISH TRANSLATION FROM ORIGINAL
ENCLOSURE: COPY OF GAR 2016/426 CERTIFICATE
MODEL
SERIAL NUMBER
VOLTAGE
MOUNTH/YEAR
COUNTRY OF DESTINATION:
COMPLIES WITH: GAR 2016/426 (EU); DIRECTIVE 2009/125/EC, ECODESIGN-ErP REGULATION (EU) 2016/2281, STEP II°.
THIS MANUAL IS AN INTEGRAL PART OF THE APPLIANCE. IT MUST BE DELIVERED TO THE USER AND MUST ALWAYS FOLLOW THE
APPLIANCE.
This appliance must be installed in
accordance with the national regulations
in force and used
only in a sufficiently
ventilated space.
Consult instructions before installation
and use of this appliance.
11,3x2

Rev.5 del 22/07/2021 Pag. 2 | 65
INDEX
PURPOSE ......................................................................................................................................... 3
GENERAL INFORMATION AND PRECAUTIONS............................................................................... 5
REFERENCE STANDARDS, DIRECTIVES AND REGULATIONS.......................................................... 8
PLATE OF THE CHARACTERISTICS OF THE WARM AIR HEATER ................................................... 9
PACKAGING................................................................................................................................... 10
TRANSPORT, LOADING AND UNLOADING ................................................................................... 10
CONSTRUCTION CHARACTERISTICS ........................................................................................... 11
DATA SHEET WARM AIR HEATER series “L” and variants, “LO”, “LE”, “LEO”..................................... 23
ECODESIGN................................................................................................................................... 24
DATA SHEET WARM AIR HEATER series “L” and variants, “LO”, “LE”, “LEO”..................................... 26
WARM AIR HEATER "LP" SERIES.................................................................................................. 29
COMPOSITION OF WARM AIR HEATER “LP” series..................................................................... 30
DATA SHEET “LP” series................................................................................................................ 32
INSTRUCTIONS FOR THE USER.................................................................................................... 33
INSTALLATION INSTRUCTIONS................................................................................................... 35
BURNER COUPLING ...................................................................................................................... 39
“LR” HEATING SECTIONS OF “L” WARM AIR HEATERS................................................................ 49
TECHNICAL DATA “LR” SERIES .................................................................................................... 51
ELECTRICAL DIAGRAMS ............................................................................................................... 52
TROUBLESHOOTING ..................................................................................................................... 60
CERTIFICATES............................................................................................................................... 61

Rev.5 del 22/07/2021 Pag. 3 | 65
PURPOSE
Machine we mean the warm air heater complete with its accessories
This manual is intended for operators and specialized personnel and provides important information and warnings on
safety in the installation, commissioning, use and maintenance of the machine, to allow it to be used correctly.
Inside you will find the following descriptions and information:
-a functional description of the machine and of each of its parts
-machine safety information
-information for correct installation of the machine
-information for correct use of the machine
-information for correct routine and scheduled maintenance of the machine
Symbols used in the manual
In some parts of the manual there are triangular DANGER signs.
Pay great attention to these, as they indicate a situation of potential danger.
DANGER
Maximum danger level!
This symbol indicates operations which, if not carried out correctly, cause serious injury, death or
long-term health risks.
WARNING
This symbol indicates operations which, if not carried out correctly, may cause serious injury, death or
long-term health risks.
CAUTION
This symbol indicates operations which, if not carried out correctly, may cause damage to the ma- chine
and/or injury to people.
DANGER LIVE COMPONENTS
This symbol indicates operations which, if not carried out correctly, lead to electric shocks with lethal
consequences.
DANGER FLAMMABLE MATERIAL
This symbol indicates the presence of flammable materials.
DANGER BURNING
This symbol indicates the risks of burns due to high temperatures.
DANGER CRUSHING OF LIMBS
This symbol indicates the presence of moving parts: danger of crushing of limbs.
WARNING MOVING PARTS
This symbol indicates that you must keep limbs away from moving mechanical parts; danger of crushing.
DANGER EXPLOSION
This symbol signals places where an explosive atmosphere may be present. An explosive atmosphere is
defined as a mixture - under atmospheric conditions - of air and flammable substances in the form of
gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire
unburned mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must be worn and kept by the operator for protection against
threats against safety and/or health while at work
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the machine with respect for the environment.
IMPORTANT INFORMATION
This symbol indicates important information that you must bear in mind.
DANGER
WARNING
CAUTION

Rev.5 del 22/07/2021 Pag. 4 | 65
This manual is an essential and integral part of the machine, therefore it must be followed, even in the case
of transfer of ownership or to another facility, and must be stored with care.
In case of damage or loss, another copy must be requested from the manufacturer.
The operator and specialized personnel are required to read and understand the contents of this manual.
The manufacturer declines all responsibility for damage to people, animals and things caused by:
oincorrect use of the machine;
oimproper intended use of the machine;
ouse of the machine that does not comply with the instructions in this manual;
ouse that does not comply with laws, regulations, decrees, prescriptions, European, national, regional
and district ordinances.
The manufacturer also declines all responsibility if the machine is not installed or checked
periodically or repaired by service centres authorized by the manufacturer or by personnel specialized.
By specialized personnel we mean “maintenance technicians with specific knowledge of
heating in rooms where people are present".
This machine cannot be used by people (including children) with reduced physical, sensory,
mental or with little experience and knowledge of the machine in question unless the person is
been instructed on its use by the person responsible for its safety or operates under supervision
of the person responsible for safety.
IT IS STRICTLY FORBIDDEN TO USE THIS MACHINE IN THE PRESENCE OF AN
EXPLOSIVE ATMOSPHERE.
The system design, installation, commissioning, periodic checks and repairs of this machine must only be
carried out by qualified personnel.
In particular, attention is drawn to the obligations imposed by laws, decrees, rules, ordinances,
Prescriptions European, national, regional and local in matters of design, authorizations, installation,
controls periodicals, maintenance, combustion checks and atmospheric emissions, which the operator and
In the event of problems or malfunctioning of the machine, the operator must disconnect the power supply
machine and avoid any attempt to repair in order to avoid damage to the machine and / or to third parties.
See description in the TROUBLESHOOTING chapter of this manual.
Before any maintenance or repair work, remove the power supply to the
machine by selecting - O - on the electric control board
.
At the end of each heating season, the operator must request the intervention of specialized personnel to clean the
combustion chamber and the heat exchanger.
At the beginning of each heating season and, according to the deadlines set by law and regulations, the operator must
have the efficiency of all functional and safety parts of the machine checked by specialized personnel and have the
combustion checked.
The results of these interventions will be recorded in the "central log book".
The air filter, if provided, must be kept clean frequently to keep it clean.
It must be removed from its frame, blown with compressed air (see MAINTENANCE chapter) and put back in its frame.
When the air intake grille is dirty, it must be cleaned with a brush or vacuum cleaner without however removing it.
Explanation of graphic symbols on controls and alarm devices
Voltage
Heating
Intervention of the thermal
switch of the remote
Intervention of the safety limit
with manual reset
Burner off
Only ventilation
WARNING

Rev.5 del 22/07/2021 Pag. 5 | 65
GENERAL INFORMATION AND PRECAUTIONS
This machine is suitable for the following uses:
a) Direct heating of the blown air through its own fan unit.
The heat exchange occurs by contact between the external walls of the combustion chamber / heat exchanger and the
air that passes through it.
b) Ventilation only.
In mode (a), the machine must be equipped with a burner, connected to the electric power supply line, to the gas pipe
and to a suitable system for discharging the products of combustion and condensate.
In mode (b) it is sufficient to connect the machine to the power supply line.
This machine must be used for heating the room air.
Attention is drawn to the fact that the machine is not suitable for use for other purposes; and in
particular it is not suitable for use in normal operation at average air outlet temperatures above 80 ° C.
The manufacturer is solely responsible for the functional characteristics of the machine
if it is used in the manner and within the limits described in this manual.
Liability and Warranty
The manufacturer guarantees its new products from the date of installation in accordance with current regulations and /
or in accordance with the sales contract.
Verify, upon initial start-up, that the machine is intact and complete.
Failure to comply with what is described in this manual, operational negligence, incorrect installation and the execution
of unauthorized modifications, cause the manufacturer to void the machine warranty.
In particular, the warranty and liability rights expire in the event of damage to persons and / or things, if the damage
itself is attributable to one or more of the following causes:
-incorrect installation, commissioning, use and maintenance of the machine;
-improper, erroneous and unreasonable use of the machine;
-intervention of unskilled personnel;
-execution of unauthorized modifications to the machine;
-use of the machine with defective safety devices, incorrectly applied and / or not working;
-installation of additional components not tested together with the machine;
-supplying the burner with unsuitable fuels;
-defects in the fuel supply system;
-use of the machine even following the occurrence of an error and / or an anomaly;
-repairs and / or overhauls performed incorrectly;
-modification of the combustion chamber by introducing inserts that prevent the regular development of the
constructively established flame;
-insufficient and inappropriate supervision and care of the machine components most subject to wear;
-use of non-original components, whether they are spare parts, kits, accessories and optionals;
-causes of force majeure.
Furthermore, the manufacturer furthermore declines any and every responsibility for the failure to
observe the contents of this manual.
WARNING

Rev.5 del 22/07/2021 Pag. 6 | 65
Information on safety and prevention
The machine has been designed and built in compliance with the standards and directives in force, applying the
known technical safety rules and providing for all potential dangerous situations.
However, it is necessary to take into account that careless and clumsy use of the machine can cause situations of
danger of death for the user or third parties, as well as damage to the machine itself or to other assets.
Distraction, lightness and too much confidence are often the cause of injuries; as can fatigue and drowsiness.
The following should be taken into consideration:
-the machine must only be used for the use for which it was expressly intended.
-Any other use is to be considered improper and therefore dangerous.
In particular:
the type and pressure of the fuel, the voltage and frequency of the supply voltage, the minimum and maximum flow
rates at which the machine can be adjusted, the ambient temperature, must be within the values indicated in this
manual.
-It is not allowed to modify the machine to alter its performance and intended use.
-The machine must be used in flawless technical safety conditions.
Any disturbances that could compromise safety must be eliminated promptly.
-It is not allowed to open or tamper with the machine components, except only the parts required for
maintenance.
-Only the parts specified by the manufacturer can be replaced.
The manufacturer guarantees safety and proper functioning only if all machine components are intact and positioned
correctly.

Rev.5 del 22/07/2021 Pag. 7 | 65
CONSTRUCTION EXAMINATION AND SAFETY REQUIREMENTS
The warm air heater consists of an aluminium frame and an external panelling in pre-painted sheet metal: the panels
are internally insulated with a glass wool mat.
In the heating section we find a combustion chamber and a heat exchanger.
In this area, the insulating mat is protected against the danger of overheating by a galvanized sheet cover.
In the fan section, located in the lower part of the warm air heater, there are one or more double inlet centrifugal fans,
individually driven by a three-phase electric motor / s with belt drive / s.
The fan unit is protected by an anti-finger grid that prevents accidental contact with parts of the body and the entry of
leaves or external objects.
It is designed to prevent the entry of a ball with a diameter of 16 mm, with a force of 5N.
The grid can only be removed with the aid of a tool.
The combustion chamber, built in stainless steel for high temperatures, is fixed to the frame so that its thermal expansion
does not compromise its duration over time.
The heat exchanger made with stainless steel tubes is solidly welded to the combustion chamber.
Suitable openings on both sides allow easy access for inspection and maintenance.
On the front side of the warm air heater we find:
- a plate to fit the automatic forced draught gas / fuel oil burner
- an electric control board complete with
- switch
- HEATING / VENTILATION / BURNER STOP switch
- voltage indicator
- remote switch thermal intervention light (only in 3F models)
- Safety Limit intervention light;
a combination of 3 thermostats (TRITHERMOSTAT) ensure the following control and safety functions:
- FAN (TR): thermostat normally open for the automatic start and stop of the fan unit in
"HEATING" phase;
- LIMIT (TW): burner maximum thermostat, normally closed with automatic reset.
o Automatically turns off the burner to prevent the air temperature at the warm air heater
outlet exceeding the safety limit;
- LIMIT2 (STB): burner safety thermostat, normally closed with manual reset and a positive security.
o Automatically turns off the burner to prevent the air temperature at the warm air heater outlet from
exceeding the safety limit set by the reference standard.
Its calibration is imposed at 100°C by the manufacturer and must not be modified to avoid overheat
of the warm air heater;
(to reset the burner, read the instructions in the Chapter: TRI-THERMOSTAT).

Rev.5 del 22/07/2021 Pag. 8 | 65
Other essential safety requirements
Electrical equipment.
After the various assembly stages, all warm air heaters are subjected to the following electrical checks to verify
compliance:
- visual check of the electrical circuit and tightening of the connections;
- continuity of the earth circuit;
- insulation resistance test;
- voltage test.
Temperatures.
The temperatures of the accessible areas for normal use of the warm air heater comply with the European reference
standard.
Noise.
All the necessary measures have been taken to contain noise.
The values in dB (A) are shown in the tables Chapter: TECHNICAL DATA.
Reports.
The signals on the controls and on the alarm devices are made with graphic symbols according to the ISO7000 standard.
For an explanation of the symbols used, refer to the Chapter Explanation of Graphic Symbols on page. 4.
At the beginning of each heating season and, according to the deadlines set by law and regulations, the operator must
have the efficiency of all functional and safety parts of the machine checked by specialized personnel and have the
combustion checked.
The results of these interventions will be recorded in the "central booklet".
The air filter, if provided, must be kept clean frequently to keep it clean.
It must be removed from its frame, blown with compressed air (see MAINTENANCE chapter) and put back in its frame.
When the air intake grille is dirty, it must be cleaned with a brush or vacuum cleaner without however removing it.
REFERENCE STANDARDS, DIRECTIVES AND REGULATIONS
The manufacturer declares that the machine is built in a workmanlike manner based on UNI, UNI technical
standards CIG, CEI; is according to:
- to GAR 2016/426 (EU),
- the Machinery Directive 2006/42 / EC,
- the Low Voltage Directive 2014/35 / EU,
- the Electromagnetic Compatibility Directive 2014/30 / EU,
- to ECODESIGN: Directive 2009/125 / EC,
- ErP REGULATION 2016/2281 / UE, STEP II °
SOME REFERENCE STANDARDS AND LAWS:
- UNI-CIG 7129 for natural gas installations
- UNI-CIG 7131 for LPG installations
- EN 17082: 2019
- Law 10/91 for the containment of energy consumption
- Law 46/90 for plant safety
- Ministerial Decree 08/11/2019 technical rule of fire prevention

Rev.5 del 22/07/2021 Pag. 9 | 65
PLATE OF THE CHARACTERISTICS OF THE WARM AIR HEATER
On the front of the warm air heater, the Technical Characteristics Plate is applied, made with ultra-destructible film
which, if removed, cannot be reused.
A facsimile of this plate is shown below.
Fig. 1 Facsimile of the plate on the warm air heater

Rev.5 del 22/07/2021 Pag. 10 | 65
PACKAGING
For the L-LE versions, the warm air heater is delivered on a pallet and protected with bubble polyethylene and stretch
film.
The other versions LO-LEO-LP-LR delivered without pallet but with support feet and protected with polyethylene bubbles
and stretch film.
The air delivery plenum, if supplied, is packaged with or separately from the warm air heater depending on the models.
The packaging is accompanied by a packaging plate bearing the description of the machine, according to EN17082:
2019.
TRANSPORT, LOADING AND UNLOADING
The transport, loading and unloading of the machine must be carried out with caution in order not to damage
it and not to cause damage to people, animals or things.
A forklift with sufficient load capacity according to the safety factor can be used for loading and unloading the
machine (see the gross weight of the machine in the tables contained in the WEIGHTS AND DIMENSIONS
chapters).
During these operations, check the center of gravity of the machine in order to keep the load balanced, thus
avoiding dangerous inclinations.
It is also possible, for the L-LE versions, to load and unload the machine using bands for lifting through the rods
welded to the combustion chamber pipes.
After removing the packaging, check the integrity of the machine.
If in doubt, contact the manufacturer or the local agent.
Packaging materials
The packaging materials (wood, cardboard, polystyrene, nails, etc.) must be collected and disposed of in
accordance with the laws in force.
Before proceeding with the installation operations, carry out a thorough cleaning all around the area
supervisor.
Keep out of reach of children these materials, they can be dangerous.
Fig. 2 Packed warm air heater
Positioning
Once the packaging has been removed, the machine must be positioned as described in
Chapter Location of the warm air heater
DO NOT overturn the machine for any need.
CAUTION
CAUTION
CAUTION

Rev.5 del 22/07/2021 Pag. 11 | 65
CONSTRUCTION CHARACTERISTICS
COMPOSITION OF WARM AIR HEATER series “L” and “LO” version
Models “30” and “60” with single-phase motor and direct driven fan
1) Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) Fan motor
13) Tri-thermostat
14) Electrical board
16) Frame made of aluminium
sections
17) External insulated panels
Models from “80” to “200” with three-phase motor and transmission driven fan
1) Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) Fan motor
13) Tri-thermostat
14) Electrical board
15) Pulleys and drive belts
16) Frame made of aluminium
sections
17) External insulated panels
18) Motor's belt tightening slide

Rev.5 del 22/07/2021 Pag. 12 | 65
Models from “250” to “600” with three-phase motor, and transmission driven fan
1) Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) 2 Fan motors
13) Tri-thermostat
14) Electrical board
15) Pulleys and drive belts
16) Frame made of aluminium
sections
17) External insulated panels
18) Motor's belt tightening slide
Fig. 3 Left: Warm air heater 1Ph with air inlet filter and plenum for direct air distribution.
Right: Warm air heater 3Ph with plenum.

Rev.5 del 22/07/2021 Pag. 13 | 65
WEIGHTS and DIMENSIONS "L" SERIES
Weight in [kg] and dimensions in [mm].
NOTE 1: The L 600 model is made in 2 sections with the height of the fan section of 1150 mm and the heating section
of 1690 mm.
HEATER Head
height Flue height Air Outlet connection Air Inlet connection Frame profile Frame system
Weight Net
head
weight
MOD. Lenght Width Height Net Packed
A
B
C
D
E
F
G
H
I
L
Ø
Kg
Kg
Kg
L30
660
530
1430
305
705
490
620
480
620
20
150
110
115
10
L60
870
636
1750
305
860
596
830
630
830
20
150
176
183
12
L80
1020
750
1950
405
935
670
940
690
940
40
130
225
235
37
L100
1020
750
1950
405
935
670
940
690
940
40
130
240
250
37
L150
1440
1020
2340
405
1070
940
1360
760
1360
40
150
390
400
40
L175
1440
1020
2340
405
1070
940
1360
760
1360
40
150
400
410
40
L200
1440
1020
2340
405
1070
940
1360
760
1360
40
150
415
425
40
L250
1790
1020
2340
405
1130
940
1710
760
1710
40
200
520
535
46
L300
1790
1020
2340
405
1130
940
1710
760
1710
40
200
550
565
46
L425
2300
1340
2660
405
1220
1260
2220
930
2220
40
250
850
870
67
L500
2300
1340
2660
405
1220
1260
2220
930
2220
40
250
870
890
67
L600(1)
2300
1500
2840
445
1400
1420
2220
1070
2220
40
250
965
985
70
The air inlet grille is on the LEFT up to model L200 and
on the RIGHT from model L250 up to model L600.
RIGHT and LEFT are in relation to the burner side.
In the drawing the grille is RIGHT
The grille position can be reversed.
Ø
Head-
heater
connection
Connection
of the air
outlet duct
Connectionof
the air inlet
duct

Rev.5 del 22/07/2021 Pag. 14 | 65
UNION OF THE FAN SECTION WITH THE HEATING SECTION OF WARM AIR HEATERS L
600 and variants
The warm air heaters L 600 and variants are produced and delivered in 2 sections (fan and heating).
Proceed as follows:
- remove the packaging of the 2 sections;
- remove the pallet by lifting the ventilating section (A) by means of the 4 lifting eyebolts located on the
upper profile of the section itself;
- place the ventilating section (A) on a level floor;
- remove the 4 lifting eyebolts
- position the self-adhesive gasket (2) supplied along the side of the aluminum profile so that it adheres to the
aluminum profile of the heating section (B);
- place the heating section (B) on the ventilating section (A) using the 4 lifting eyebolts located in the upper
profile of the section itself;
- remove the 4 lifting eyebolts
- for mod. LO and LEO join the 2 sections horizontally;
- fix the 2 sections with the supplied screws through the brackets (1) located in the fan section (A);
- connect the tri-thermostat to the electrical panel with the supplied cable.
The warm air heater is supplied with screws, plates, brackets and self-adhesive gaskets for the versions LO e
LEO.
ASSEMBLY OF THE BURNER PROTECTION CABIN FOR "LE 600" WARM AIR HEATERS
Proceed as follows:
- place the edge (4) of the cabin on the upper profile of the hot air generator, on the burner side;
- drill the side profiles in correspondence with the brackets (3) of the cabin (holes Ø 5 mm);
- screw the brackets with the supplied screws.
FIXING THE PLENUM ON THE WARM AIR HEATERS L 300-425-500- 600 series
-Place the head for direct air delivery on the warm air heater
-Position the 4 brackets supplied (as shown in the photo).
-Screw the 16 self-drilling screws 6.3x16 supplied both on the profile of the
warm air heater and on the profile of the head.

Rev.5 del 22/07/2021 Pag. 15 | 65
WEIGHTS and DIMENSIONS "LO” SERIES
Weight in [kg] and dimensions in [mm].
The air inlet grille: Choice of positions 1-2-3
RIGHT and LEFT are in relation to the burner side.
In the drawing the grille is RIGHT.
NOTE 1: The model LO 600 is made in 2 sections with the length of the fan section of 1600 mm and of the heating
section of 1690 mm
HEATER Head
height Flue height
Air Outlet and
Inlet
connections
Air Inlet
connection Frame profile Flue system Weight
Net head
weight
MOD.
Lenght
Width
Height
A
B1
C1
D
E1
F1
I
H1
I
L
Ø
Kg
Kg
LO30
660
530
1430
305
705
490
620
480
620
20
150
114
10
LO60
870
636
1750
305
860
596
830
630
830
20
150
180
12
LO80
1020
850
2200
405
1185
770
940
880
940
40
130
300
37
LO100
1020
850
2200
405
1185
770
940
880
940
40
130
314
37
LO150
1440
1020
2340
405
1070
940
1360
760
1360
40
150
395
40
LO175
1440
1020
2340
405
1070
940
1360
760
1360
40
150
405
40
LO200
1440
1020
2340
405
1070
940
1360
760
1360
40
150
420
40
LO250
1790
1020
2660
405
1450
940
1710
1100
1710
40
200
615
46
LO300
1790
1020
2660
405
1450
940
1710
1100
1710
40
200
645
46
LO425
2300
1340
2960
405
1750
1260
2220
1190
2220
40
250
910
67
LO500
2300
1340
2960
405
1750
1260
2220
1190
2220
40
250
935
67
LO600(1)
2300
1500
3290
445
2080
1420
2220
1520
2220
40
250
1100
70
Ø
Connection
of the air
inlet

Rev.5 del 22/07/2021 Pag. 16 | 65
COMPOSITION OF WARM AIR HEATER series “LE” and “LEO” version
Models “30” and “60” with single-phase motor, and direct driven fan
Models from “LE80’’ to” LE200’’ with three-phase motor and transmission driven fan
1) Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) Fan motor
13) Tri-thermostat
14) Electrical board
16) Frame made of aluminium
sections
17) External insulated panels
18) Burner cabin for protecting burner
and electric components
1)
Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) Fan motor
13) Tri-thermostat
14) Electrical board
15) Pulleys and drive belts
16) Frame made of aluminium
sections
17) External insulated panels
18) Motor's belt tightening slide
19) Burner cabin protecting burner
and electric components

Rev.5 del 22/07/2021 Pag. 17 | 65
Models from “250’’ to “600’’ with 2 three-phase motors and transmission driven fans
1) Air outlet
2) Rear smoke box door
3) Burner
4) Burner anchor plate
5) Centrifugal fan
6) Air inlet grille
7) Condensate drain with siphon
8) Smoke exhaust connection
9) Rear smoke box
10) Heat exchanger
11) Combustion chamber
12) Fan motor
13) Tri-thermostat
14) Electrical board
15) Pulleys and drive belts
16) Frame made of aluminium
sections
17) External insulated panels
18) Motor's belt tightening slide
19) Burner cabin protecting burner
and electric components
Fig. 5 Model LEO warm air heater for outdoor
installation in horizontal configuration.
Fig. 4 LE warm air heater for outdoor installation in
vertical configuration.

Rev.5 del 22/07/2021 Pag. 18 | 65
WEIGHTS and DIMENSIONS "LE" SERIES
Weight on [kg] and dimensions on [mm].
NOTE 1: The LE 600 model is made in 2 sections with the height of the fan section of 1150 mm and the heating
section of 1690 mm.
HEATER
Flue
height Air Outlet connection Air Inlet connection
Burner cabin
Flue
system
Weight
MOD. Lenght Width Height Depth Height
Net Packed
A B C E F G H I N O Ø Kg Kg
LE30 660 530 1430 705 490 620 490 620 400 1280 150 125 130
LE60 870 636 1750 860 596 830 630 830 500 1540 150 200 207
LE80 1020 750 1950 935 670 940 690 940 700 1320 130 265 275
LE100 1020 750 1950 935 670 940 690 940 700 1320 130 280 290
LE150 1440 1020 2340 1070 940 1360 760 1360 700 1700 150 432 442
LE175 1440 1020 2340 1070 940 1360 760 1360 700 1700 150 442 452
LE200 1440 1020 2340 1070 940 1360 760 1360 700 1700 150 457 467
LE250 1790 1020 2340 1120 940 1710 760 1710 800 2170 200 580 595
LE300 1790 1020 2340 1120 940 1710 760 1710 800 2170 200 610 625
LE 425 2300 1340 2660 1220 1260 2220 930 2220 900 2500 250 935 950
LE500 2300 1340 2660 1220 1260 2220 930 2220 900 2500 250
955
970
LE600(1) 2300 1500 2840 1400 1420 2220 1070 2220 900 2680 250 1070 1090
The air inlet grille is on the LEFT till model LE200 and on the RIGHT from model LE250 up to model LE600.
RIGHT and LEFT are in relation to the burner side.
In the drawing the grille is RIGHT
The grille position can be reversed.
Ø
Connection
of the air
inlet duct
Connection
of the air
outlet duct

Rev.5 del 22/07/2021 Pag. 19 | 65
WEIGHTS and DIMENSIONS "LEO" SERIES
Weight on [kg] and dimensions on [mm].
The air inlet grille: Choice of positions 1-2-3
RIGHT and LEFT are in relation to the burner side.
In the drawing the grille is RIGHT.
NOTE 1: The model LEO 600 is made in 2 sections with the length of the fan section of 1600 mm and of the heating
section of 1690 mm
HEATER
Flue
height
Air Outlet
connection
Air Inlet
connection
Burner cabin
Flue system
Weight
MOD.
Lenght
Width
Height
Depth
Height
A B1 C1 E1 F1 I H1 I N O Ø Kg
LEO30 660 530 1430 705 490 620 480 620 400 1430 150 130
LEO60 870 636 1750 860 596 830 630 830 500 1750 150 205
LEO80 1020 850 2200 1185 770 940 880 940 700 2200 130 345
LEO100 1020 850 2200 1185 770 940 880 940 700 2200 130 370
LEO150 1440 1020 2340 1070 940 1360 760 1360 700 2340 150 445
LEO175 1440 1020 2340 1070 940 1360 760 1360 700 2340 150 455
LEO200 1440 1020 2340 1070 940 1360 760 1360 700 2340 150 470
LEO250 1790 1020 2660 1450 940 1710 1080 1710 800 2660 200 670
LEO300 1790 1020 2660 1450 940 1710 1080 1710 800 2660 200 700
LEO425 2300 1340
2960
1750 1260 2220 1320 2220 900 2960
250
1100
LEO500 2300 1340
2960
1750 1260 2220 1320 2220 900 2960
250
1200
LEO600(1) 2300 1500 3290 2080 1420 2220 1520 2220 900 3290 250
1300
Ø
Connection
of the air
inlet duct

Rev.5 del 22/07/2021 Pag. 20 | 65
PLENUM – STANDARD HEAD FOR DIRECT AIR DELIVER
WARM AIR HEATERS OF THE "L" and "LO" SERIES
Air blown and dimensions in mm with horizontal and vertical fin vents on three sides of the nozzles.
MOD.
P Q D R T S n° of
nozzles 1) Air blown in m.
max 2)
min
L30 615 485 305 300 300 200 1+1+1 16 16
L60
825
591
305
300
300
200
1+1+1
16
16
L80
935
665
405
550
550
300
1+1+1
34
34
L100
935
665
405
550
550
300
1+1+1
38
38
L150
1355
935
405
750
750
300
1+1+1
55
55
L175
1355
935
405
750
750
300
1+1+1
60
60
L200
1355
935
405
750
750
300
1+1+1
63
63
L250
1705
935
405
750
750
300
1+2+1
74
60
L300
1705
935
405
750
750
300
1+2+1
80
62
L425
2215
1255
405
650
750
300
1+3+1
90
69
L500
2215
1255
405
650
750
300
1+3+1
94
72
L600
2215
1415
405
650
750
300
1+3+1
102
84
1) Short side (Q) + long side (P) + short side (Q).
2) The final speed of the blown air is 0.15 m/sec, and the nozzle fins’ deflection is 0°.
If deflection = 30°, multiply the blown air value by 0.65.