Alfa Plam COMMO COMPACT User manual

1212006
METAL INDUSTRY VRANJE
st:Radnička n-1
PELLET BOILER
COMMO COMPACT
Pellet →woody biomass →biofuel
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
This product meets the requirements of the Ecodesign Directive in terms of efficiency and air pollution level, in order to
contribute to the reduction of energy consumption and negative environmental impact.
E NG - V.3 .0

The heating devices (hereinafter referred to as the “boilers”) of ALFA PLAM (hereinafter referred to as ALFA PLAM) are
made and tested in accordance with the safety measures of the applicable regulations of the European Community.
This Manual is intended for the boiler users, installers, operators and persons responsible for the maintenance of the
boilers shown on the first page of the Manual.
If you have any questions related to this Manual, please contact the boiler manufacturer or an authorized service centre. In
such a case, you should always state the number of the paragraph or chapter related to the respective subject, i.e. the unclear
subject.
Any printing, translation and reproduction, even partial, of this Manual is subject to the approval of ALFA PLAM, which
means that the said activities must be approved by ALFA PLAM. The technical information, figures and specifications in this
Manual must not be provided to any third party.
IMPORTANT WARNINGS!
IMPORTANT: The connection of the device to the power supply installation must be compulsorily performed by qualified
and authorized persons in accordance with the valid legal regulations.
This device has not been foreseen for application by persons (including children) with reduced physical, motor and mental
abilities or persons with limited knowledge and experiences without the presence of persons responsible for their safety i.e.
care.
Children must not play with these types of devices.
DUAL COMBUSTION SYSTEM
The flame obtained by the normal combustion of wood in the boiler emits the same quantity of carbon dioxide (CO2) that
would be released as a result of the natural decomposition of wood.
The quantity of carbon dioxide (CO2) obtained by the combustion or decomposition of plant mass corresponds to the
quantity of carbon dioxide (CO2) that plant mass is capable of obtaining from its surroundings and transforming it into oxygen
for air and carbon of the plant during its whole life.
The use of non-renewable fossil fuels (coal, oil, gas), contrary to what happens with wood, releases into the atmosphere
enormous quantities of carbon dioxide (CO2) accumulated for millions of years, thus causing the greenhouse effect. The use
of wood as fuel is therefore perfectly balanced with the environment because wood as renewable fuel is in ecological harmony
with nature.
These goals are completely accomplished through the principle of clean combustion and this is why the designs of the
ALFA PLAM products are based on this principle.
What does clean combustion mean and how does it take place?
The control and adjustment of primary air and the introduction of secondary air generate, i.e. cause secondary combustion
or the so-called post-combustion that produces the secondary flame which by its nature is brighter and stronger than the
main or primary flame. The addition of new oxygen (through the introduced air) enables the additional combustion of gases
that were not completely combusted. This significantly increases the thermal effect and decreases the harmful emissions of
carbon monoxide (CO) because the incomplete combustion is reduced to a minimum. These are the basic characteristics of
the boilers and other products of ALFA PLAM.
CAUTION
- The minimum installed power of the heating system must not be less than 65% of the nominal power of the boiler and the
maximum installed power of the heating system must not be more than 100% of the nominal power of the boiler.
- The chimney, to which the boiler is connected must meet the requirements provided in the user manual.
- When connecting the appliance to the chimney, never use flexible hoses instead of flue pipes.
- Regular maintenance and care, such as cleaning the boiler, the flue pipes and the nozzles (of the pipes), are important to
ensure safety, and especially for the sake of economy and in order to maintain the value of the boiler.
- Unauthorized modification of the device is prohibited and therefore any unauthorized modification shall render the
warranty null and void.
0.0 TEH.KARAKTERISTIKE –XMAX
1. Dimensions:
-Width 590 mm
-Depth 672 mm
-Height 1222 mm
2. Diameter of the forge hood connection 80 mm
3. Diameter of the external air intake 100 mm
4. Height from the floor to the forge hood connection axis 380 mm
5. Maximum power 23,13 kW
6. Maximum consumption 5,4 kg/h
7. Degree of utilization with the maximum power 90,17%
8. Minimum power. 7,42 kW
9. Minimum consumption 1,717 Kg/h
10. Degree of utilization with the minimum power 90,92 %
11. Minimum draught 5 Pa
12. Optimal draught 12 Pa
13. Heating volume 230-385 m3
14. Capacity of the funnel-shaped fuel tank 45 kg
15. Maximum operating time with a full tank 30 h
16. Minimum operating time with a full tank 9 h
17. The maximum allowable operating water pressure 1,9 ba

18. Class of boiler according to EN 303-5:2012 5
19.The flue gas mass 12,99 g/s
20. Maximum output power 450 W
21. Voltage/frequency 230V/50Hz
22. Weight:
-Net 230 kg
-Gross 265 kg

Contents:
1. THE PURPOSE OF THIS MANUAL .................................................................................................................. 1
1.1. UPDATING.............................................................................................................................................. 1
2. THE RESPONS IBILITY OF THE MANUFACTURER .......................................................................................... 1
2.1. THE BASIC CHARACTERISTICS OF THE USER......................................................................................... 1
2.2. THE TRANSPORTATION AND USE OF THE BOILER –HANDLING ............................................................ 1
2.3. THE RESPONSIBILITY OF THE INSTALLER ............................................................................................. 1
3. THE INSTALLATION –INCORPORATION OF THE BOILER .............................................................................. 2
3.1. PLACING THE BOILER ............................................................................................................................ 2
3.2. INSTRUCTIONS FOR COMBUSTION AND VENTILATION ......................................................................... 3
3.3. THE SMOKE DISCHARGE SYSTEM.......................................................................................................... 3
3.4. THE INSULATION and DIAMETER OF THE OPENINGS (Holes) ON THE ROOF (or on the Wall) ................. 6
3.5. THE INTAKE OF COMBUSTION AIR (Figure 8) ......................................................................................... 8
3.6. CONNECTION TO THE ELECTRIC POWER SUPPLY.................................................................................. 9
4. IMPORTANT INSTRUCTIONS......................................................................................................................... 9
5. WARNING OF THE SAFETY MEASURES FOR THE MAINTENANCE STAFF ....................................................... 9
5.1. WARNING OF THE SAFETY MEASURES FOR THE USER ........................................................................ 10
6. STANDARDS FOR SAFE LIGHTING AND CLEANING THE BOILER.................................................................. 10
6.1. ROUTINE CLEANING and MAINTENANCE PERFORMED BY THE USER OF THE BOILER ......................... 10
6.2. CLEANING and MAINTENANCE (for maintenance workers)................................................................... 13
6.3. SPECIAL MAINTENANCE ...................................................................................................................... 13
7. IMPORTANT SAFETY INFORMATION........................................................................................................... 13
8. THE QUALITY OF FUEL PELLETS IS VERY IMPORTANT ............................................................................... 13
8.1. FUEL PELLET STORAGE........................................................................................................................ 14
9. CONNECTION OF THE HYDRAULIC INSTALATION ....................................................................................... 14
9.1. Scheme of the hydraulic installation of a pellet boiler (radiator heating) .............................................. 14
9.2. Scheme of the hydraulic installation of a pellet boiler (radiator and floor heating)................................ 14
10. PRESSURE LINE AND RETURN DUCT ....................................................................................................... 15
11. FURNACE BUILT-IN COMPONENTS.......................................................................................................... 16
11.1. SAFETY VALVE ................................................................................................................................. 16
11.2. CIRCULATING PUMP ........................................................................................................................ 16
11.3. AUTOMATIC AIR VENT VALVE .......................................................................................................... 16
11.4. EXPANSION TANK ............................................................................................................................ 16
11.5. FILL AND DRAIN COCK ..................................................................................................................... 16
12. FILLING THE INSTALLATION AND PUTTING INTO OPERATION ................................................................ 16
13. PRACTICAL GUIDELINES FOR USING HEATING SYSTEM.......................................................................... 16
14. FILLING WITH WOOD PELLET................................................................................................................... 16
15. DESCRIPTION AND FUNCTIONING OF THE FURNACE OPERATION CONTROLLER .................................... 17
15.1. USER INTERFACE ............................................................................................................................. 17
15.1.1. Push-button display ................................................................................................................. 17
15.1.2. Push-button use ....................................................................................................................... 17
15.2. OPERATION MODE (USER)................................................................................................................ 18
15.2.1. Stove ignition............................................................................................................................ 18
15.2.2. Failed ignition ........................................................................................................................... 19
15.2.3. Stove in operational mode ........................................................................................................ 19
15.2.4. Adjustment of the temperature of the room and the water in the boiler ..................................... 19
15.2.5. The temperature of the room or the temperature of water in the boiler reaches the desired
temperature ................................................................................................................................................ 19
15.2.6. Setting the stove power ............................................................................................................ 19
15.2.7. Cleaning of the boiler ................................................................................................................ 20
15.2.8. Switching off the stove ............................................................................................................. 20
15.2.9. Reigniting the stove .................................................................................................................. 20
15.3. APPEARANCE OF THE FLAME –FIRE ............................................................................................... 20
15.4. MENU ............................................................................................................................................... 20
15.4.1. User’s menu.............................................................................................................................. 20
15.4.2. Menu 01 –setting the time....................................................................................................... 20
15.4.3. Menu 02 –programming of the stove operation ....................................................................... 21
15.4.4. Menu 03 –language selection .................................................................................................. 25
15.4.5. Menu 04 –stand-by mode........................................................................................................ 25
15.4.6. Menu 05 –sound signal mode.................................................................................................. 25
15.4.7. Menu 06 –initial filling ............................................................................................................. 25
15.4.8. Menu 07 –furnace status ......................................................................................................... 25
15.4.9. Menu 08 –technical settings.................................................................................................... 25

15.5. ALARMS ........................................................................................................................................... 26
15.5.1. Smoke temperature probe alarm............................................................................................... 26
15.5.2. Smoke temperature exceeding alarm ........................................................................................ 26
15.5.3. Ignition failure alarm................................................................................................................. 26
15.5.4. Alarm for fire extinguishing during work mode.......................................................................... 26
15.5.5. Alarm for screw feeder safety pressure stat .............................................................................. 27
15.5.6. Safety thermostat alarm ........................................................................................................... 27
15.5.7. Alarm for blower motor (fan) malfunction ................................................................................. 27
15.5.8. Power outage occurs (block-out).............................................................................................. 27
16. CONNECTION SCHEME ............................................................................................................................ 29
17. SECURITY MEASURES ............................................................................................................................. 29
18. MALFUNCTION - CAUSES - SOLUTIONS .................................................................................................. 30
19. INFORMATION ON THE DISPOSAL (DISCARDING) AND DISASSEMBLY (DISMANTLING) OF THE BOILER. 31

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1. THE PURPOSE OF THIS MANUAL
The purpose of this Manual is to enable the user to take all necessary measures and prepare all necessary equipment and
materials in order to ensure the safe and proper exploitation i.e. use of the boiler.
1.1. UPDATING
This Manual presents the state-of-the-art at the moment the boiler is placed on the market. Therefore, ALFA PLAM does
not take into account the boilers already on the market with appropriate technical documents, and considers them faulty or
inadequate after any modifications, adaptations or application of new technologies to newly launched machines.
The contents of this Manual must be read and study very carefully. You should strictly adhere to all the instructions given
in this Manual. All the information included in this booklet is necessary for the installation, use and maintenance of your boiler.
Therefore, this Manual must be carefully kept because of its instructions that may be necessary if any problem or
ambiguity arises.
If the boiler is handed over or resold to another person, the new owner must also be given this Manual.
If you lose this booklet, you can ask the manufacturer for a new one.
2. THE RESPONS IBILITY OF THE MANUFACTURER
Upon publishing this Manual, ALFA PLAM will not accept any civil or legal responsibility, either direct on indirect, due to:
− Accidents occurred due to the non-observance of the standards and specifications stated in this
Manual,
− Accidents occurred due to the improper operation or use of the boiler by the user,
− Accidents occurred due to any modifications and repairs not approved by ALFA PLAM,
− Poor maintenance,
− Unpredictable events,
− Accidents occurred due to the use of spare parts that are not original spare parts or that are not
intended for these models of the boiler.
The installer of the boiler shall take the full responsibility for the installation.
2.1. THE BASIC CHARACTERISTICS OF THE USER
The boiler must be used by adult and responsible people.
Make sure that children do not approach the boiler, when it is in use, with the intention of playing.
Children must not approach the boiler, while in function, with the intention of playing. This appliance can be used by
children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience
and knowledge. if they are supervised by an elderly person who is familiar with the instructions of use. Children cannot carry
out the cleaning and maintenance of the boiler, if they are not supervised by an elderly person.
2.2. THE TRANSPORTATION AND USE OF THE BOILER –HANDLING
During the use of the boiler care should be taken that the boiler is not leaned forward because the centre of gravity of the
boiler is oriented forward.
While moving the boiler, which must be carried out absolutely safely, ensure that the forklift truck has a carrying capacity
that is higher than the weight of the boiler it should lift. Avoid twitches and abrupt movements.
ALL THE PACKAGING MATERIAL SHOULD BE REMOVED AWAY FROM THE REACH OF CHILDREN AS THE MATERIALS
CONTAINED IN THE PACKAGING MAY CAUSE SUFFOCATION. THESE INCLUDE PLASTIC BAGS, FILMS, STYROFOAM, ETC.
2.3. THE RESPONSIBILITY OF THE INSTALLER
The responsibility of the installer is to perform all the checkups of the flue piping, air intake/supply, as well as all the
solutions required for the installation (incorporation) of your boiler.
The responsibility of the installer is to ensure that the boiler is in compliance with local regulations applicable in the place
where the boiler is installed (incorporated).
The use of the boiler must be in accordance with the instructions given in this Manual for use and maintenance, as well as
with all the safety standards prescribed by local legal regulations applicable in the place where the boiler is installed
(incorporated).
The installer must verify (confirm):
− The type of the boiler that is being installed,
− Whether the room in which the boiler is being installed is appropriate, which is expressed as the minimum size of
the room required for the installation as prescribed by the boiler manufacturer,
− Instructions of the heat generator manufacturer, related to the requirements of the smoke discharge system
(smoke discharge ducts and pipes),
− The internal cross section of the chimney, material the chimney is made of, cross-sectional uniformity, whether
there are any obstacles and barriers in the chimney,
− The height and vertical extension of the chimney,
− The height above the sea level at the place of installation/incorporation,
− The existence and suitability of a wind resistant protective cover of the chimney,
− The possibility of providing the external air intake and the size of required openings,
− The possibility of the simultaneous use of the boiler which is to be installed, together with the other equipment
already existing in that place.
If the results of all the checkups are positive, then the installer may proceed with the incorporation/installation of the
boiler. The instructions provided by the boiler manufacturer, as well as the fire prevention standards and safety standards
must also be observed.

2
When the installation is completed, the system must be put into a trial operation for at least 30 minutes in order to check
up all the packing and seals of the system.
When the incorporation and significant details are completed, the installer is obliged to provide the client with the
following:
− The Use and Maintenance Manual issued by the boiler manufacturer (if such a manual has not been delivered
with the boiler),
− The documents required for the compliance with existing standards.
3. THE INSTALLATION –INCORPORATION OF THE BOILER
The user shall be fully responsible for the works executed at the incorporation site.
Before putting the boiler into operation, the installer must meet all legal safety standards, in particular:
− Ensure that the boiler installation is in accordance with local, national and European regulations,
− That it fulfils the requirements stated in this document,
− That the installation of the flue piping and air intake corresponds to the type of the installed boiler,
− That the electric connections must not be executed with the use of temporary and/or non-insulated electric cables,
− Check the efficiency of the electrical system grounding,
− Always use the personal protective equipment and all the protective means prescribed by applicable local
regulations,
− Always ensure sufficient servicing space required for any maintenance and repairs of the boiler.
3.1. PLACING THE BOILER
We advise you to unpack the boiler only when it is put in the place where it is to be installed.
The boiler stands on plastic legs with cast-in screws M10 (4 pieces) screwed into the base of the boiler. Nuts M10mm are
screwed onto the screws up to the plastic part. The legs are also maximally screwed, up to the base of the boiler. When you
unpack the boiler and bring it to the spot on which it is to be installed, unscrew all the legs to obtain the total height from the
floor to the boiler base i.e. to ensure that the legs are protruded from the boiler base for around 25mm. When you finish
levelling the boiler which should stand horizontally, tighten the nuts while holding the plastic part of the leg with your hand.
Tighten the nuts using spanner 17 so that they reach the boiler base. The height of around 25mm from the floor to the boiler
base is needed for air circulation and better boiler cooling. In this way, you will protect the boiler against overheating and
extend its service life.
If the surrounding walls and/or floor are made of materials that are not heat resistant, appropriate protection should be
used consisting of incombustible insulation material.
Always ensure a safe distance (around 35/40 cm) between the boiler and your furniture, home appliances, etc. In order to
protect the floor, if it is made of combustible material, we suggest that you put on the floor, under the boiler, a metal plate with
a thickness of 3 to 4 mm that would protrude for 30 cm ahead of the boiler front.
All minimum safety distances are indicated on the product data plate, DO NOT use lower values than specified (see
INFORMATION ON CE MARKING).
The boiler must be placed at a distance of at least 25 cm from the surrounding walls. Always leave at least 15 cm between
the back of the boiler and the wall in order to ensure the proper circulation of air, i.e. to allow air to properly flow through this
space.
If the boiler is to be placed in a kitchen with a ventilation grid, or if it is to be placed in rooms with solid fuel heat generators
(such as wood burning boilers), always ensure that the quantity of the inlet air (into the kitchen or room) is sufficient to provide
the safe operation of the boiler.
If the smoke discharge channel should pass through the ceiling, the ceiling should have proper thermal insulation made of
incombustible insulating material. Once the boiler is placed, it should be levelled with the use of the adjustable legs.
DANGER
The smoke discharge fittings MUST NOT be connected to:
− The flue pipe used by another heat generator (water heaters, boilers, fireplaces, kitchen boilers, etc.),
− To the air exhaust system (grids, vents, etc.), even if the system is inserted in the pipe discharge.
DANGER
It is prohibited to install air circulation (draught) shut-off valves (flaps, valves that may prevent air circulation i.e. that may
prevent draught).
CAUTION
If the smoke discharge path produces poor draught i.e. poor air circulation (if the path has numerous bends, inappropriate
smoke discharge end, narrowing, etc.), the smoke discharge can be bad, i.e. inappropriate.
The smoke discharge system functions on the basis of the negative pressure and mild pressure of the flue pipe. It is very
important that the smoke discharge system is sealed. This requires the application of a pipe smooth inside. When the flue pipe
is to be placed through the walls and roof, the plan and structure of the room should be thoroughly analysed and studied first,
so that the pipe may be placed properly in accordance with the fire prevention standards.

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First, it should be ensured that there is sufficient combustion air in the room where the boiler is located. Occasional
inspection is recommended to ensure that combustion air is properly supplied to the biofuel combustion chamber. The boiler
operates on 230 V –50 Hz. Ensure that the electric cable is not entangled under the boiler, that it is away from hot places and
that it cannot come in contact with any sharp edge that could cut it. If the boiler is electrically overloaded, this may shorten the
service life of the electronic parts of the boiler.
Never turn off power supply by pulling out the plug while flames are still burning in the boiler. This may jeopardize the
proper operation of the boiler.
3.2. INSTRUCTIONS FOR COMBUSTION AND VENTILATION
Combustion air must be supplied to the rooms where the stove is installed. The room must be constantly ventilated.
An fresh air opening must be located in the lower part of the room and air should enter through it.
A) Supply of combustion air by means of a pipeline through the basement. This connection option leads to a preheating of
the combustion air, which is useful for a good and clean combustion. The installation of pipelines in the basement is simple.
B) Supply of combustion air through the basement. The combustion air is preheated. The basement space must be
separated from the ventilation system of the house and open to the outside. High levels of dust and moisture should be
avoided.
C) Supply of combustion air from above. Air supply from above can only be performed with tested chimney systems.
In this case, it is necessary to calculate the dimensions of the chimney!
D) Supply of combustion air directly from outside. If combustion air is directly supplied through the outer wall, it shall be
only be slightly preheated, which is unfavorable for a clean combustion. In this case there is also risk of condensation!
NOTE: We do not recommend these versions of air supply! However, if you use these options, consult a qualified
professional.
In the room where the heating device is installed, it is necessary to ensure sufficient supply of fresh air. If the windows and
doors are hermetically sealed or if there are air-extracting devices, such as hoods, hair dryers, fans etc., in the room where the
stove is installed, combustion air (fresh air) must be supplied from outside. In any case, this should be discussed with a
competent chimney sweep before installing the stove.
Supply of fresh air in the room where the stove is installed
3.3. THE SMOKE DISCHARGE SYSTEM
The smoke discharge must be executed in accordance with the existing standards. The flue pipe should be thoroughly
sealed. See Figures 1 to 7.
For smoke discharge, classic brick chimneys can be used, or chimneys may be made of pipes that must be thoroughly
insulated (double wall) and sealed in order to prevent condensation in them.
The discharge pipe must not be connected with other systems of any type, such as the systems for discharging smoke
from the combustion chamber, exhaust grid or air distribution systems, etc. Furthermore, the flue pipe must not be located in
closed or semi-closed rooms such as garages, narrow corridors, under closed huts or any other place where smoke may
appear. When the boiler is to be connected to the flue piping, a professional chimney sweep should be called to verify that
there are no even tiniest cracks or fissures in the chimney. If the smoke discharge chimney has any cracks, the flue pipe must
be wrapped in new material in order to ensure proper functioning.
For this purpose, rigid pipes made of non-ferrous steel (with a minimum thickness of 1.5 mm) can be used, or pipes made
of stainless steel (with a minimum thickness of 0.5 mm).
The smoke discharge system (chimney) made of metal pipes must be grounded in accordance with applicable standards
and legal regulations. Grounding is prescribed by the law.
This grounding connection must be independent of the boiler grounding.
The flue pipe must be made in compliance with the standards regarding the dimensions and materials used for its
construction (Figure 1).
A) Wind resistant chimney top
B) Maximum cross section of 15 x 15 cm or a diameter of 15 cm, maximum height of 4-5 m.

4
C) Seal
D) Inspection –control opening.
Flue pipes in bad condition or made of inappropriate material (asbestos cement, galvanized sheet metal, etc. with coarse
and rough or porous surfaces) are illegitimate and they jeopardize and hamper the proper operation of the boiler.
Smoke can be discharged through a classic flue pipe (see the figures below) provided that the following regulations are
met:
− Check the maintenance condition of the flue pipe or the chimney. If the discharge flue pipe is old, it should be
replaced by a new one. If the chimney is damaged, it should be repaired or refurbished by inserting a steel pipe
properly insulated with mineral wool.
Figure 1
Figure 2
− Smoke is discharged directly into the flue pipe (chimney) only if its cross section is up to 15 x 15 cm or if its diameter is
up to 15 cm and if it has a cover for the purposes of inspection and cleaning.
− If the cross section of the chimney is larger than 15x15cm or its diameter is larger than 15cm, the possible control of
increased draught (decreasing) in the chimney can be performed in three ways:
1. If there is an opening for the purpose of cleaning at the bottom of the chimney, it should be partially opened.
2. A steel pipe with a diameter of 10 cm should be inserted into the chimney if you have elements for such a refurbishment
of the chimney.
3. By the regulation of certain parameters in the boiler. This regulation can be performed only by an authorized service
centre of Alfa plam.
− Ensure that the connection for the house chimney is properly sealed.
− Avoid any contact with easily combustible material (such as wooden beams), and in any case these should be insulated
with fire resistant material (see Figure 2).
A) Mineral wool
B) Steel pipes
C) Partition plate.
The boiler is designed for the connection to the chimney with flue pipes whose diameter is 80mm. If the standard chimney
is not used but a new one is being constructed or the existing chimney is being refurbished, use insulated stainless steel pipes
(double wall) with a diameter in accordance with Table 1. The use of flexible pipes is not allowed.
SYSTEM TYPE
DIAMETER mm
SYSTEM ASSESMENT
Pipe shorter than 5 m
100
acceptable
Pipe longer than 5 m
120
obligatory
Installation at places where the elevation above the sea level is higher
than 1,200 meters
120
recommendable
Table 1
When you use a connecting pipe between the boiler and the discharge flue pipe, you must also use a “T” coupling (as it is
shown in Figures 5 and 6), with the cover for the purpose of cleaning (plug) next to the boiler. The application of this “T”
coupling must enable the collection of ashes generated inside the pipe and cleaning of the discharge flue pipe from time to
time without removing the pipe. The smoke is under mild pressure. Because of this, it is necessary to check if the opening i.e.
the cover (plug) for cleaning the smoke discharge system is perfectly sealed and if it remains perfectly sealed after each
cleaning. Ensure that the assembly is carried out in the same order and check the condition of the seal.
The installation of the flue pipes should be performed in accordance with Figure 7.
It is strictly recommended to avoid using horizontal extensions or elongations and if this is necessary, ensure that the pipe
is not counter leaned but that it has an inclination of at least 5%. The horizontal extensions must never be longer than 3 m.
It is not recommendable to connect the flue pipe directly to the boiler with a horizontal extension longer than 1 m. See
Figures 4, 5, 6 and 8. It is necessary to put a vertical extension of Ø 80mm with a length of at least 1-1.5 m after the “T” claw,
and only after that proceed to a horizontal extension of Ø 80mm and a vertical extension of Ø 80 or Ø 100mm depending on
the height of the flue pipe (chimney), as it is shown in Table 1.
Figure 3 on the left shows how the end (top) of the chimney should look like when there are two chimneys one next to the
other, and Figure 3 shows how the end should not be executed.

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Figure 3
AISI 316 steel chimney with double insulated chamber,
made of material resistant to 400°C. Optimal efficiency
100%
Fireproof chimney with double insulated chamber and an
outer lining of lightweight concrete.
Optimal efficiency 100%
Traditional clay chimney with recesses. Optimal efficiency
80%
It is forbidden to use chimney pipes that have a rectangular
internal cross-section with
a ratio that differs from the plan. Modest efficiency 40%