Unical PELLEXIA 80 Parts list manual

PELLEXIA 80
INSTRUCTIONS ON INSTALLATION, USE AND MAINTENANCE

2
Attention: this manual contains instructions for the exclusive use of the pro-
fessionally qualified installer and/or maintenance technician in compliance
with current legislation.
The system manager is NOT authorised to service the boiler.
The manufacturer will not be held liable in case of damage to persons, animals
or objects resulting from failure to comply with the instructions contained in
the manuals supplied with the boiler.

1 GENERAL INFORMATION ................................................................................................................................................................................... 5
1.1 General warnings ......................................................................................................................................................................................... 5
1.2 Symbols used in the manual ........................................................................................................................................................................ 6
1.3 Appropriate use of appliance ....................................................................................................................................................................... 6
1.4 Information for system manager .................................................................................................................................................................. 6
1.5 Safety warnings ........................................................................................................................................................................................... 7
1.6 Technical data plate ...................................................................................................................................................................................... 8
General informationTechnical featuresInstallation instructionsMaintenance instructions
4 INSPECTION AND MAINTENANCE ................................................................................................................................................................47
Inspection and maintenance instructions........................................................................................................................................................... 47
Maintenance of the body ................................................................................................................................................................................... 48
Cleaning and routine maintenance .................................................................................................................................................................... 48
Non-routine maintenance .................................................................................................................................................................................. 48
Maintenance operations .................................................................................................................................................................................... 49
3 INSTALLATION INSTRUCTIONS .................................................................................................................................................................... 15
3.1 General warnings .................................................................................................................................................................................... 15
3.2 Installation standards................................................................................................................................................................................ 15
3.3 Installation on old or retrofittable systems ............................................................................................................................................... 15
3.4 Packaging ................................................................................................................................................................................................ 16
3.5 Installation ............................................................................................................................................................................................... 17
3.6 Hydraulic connections .............................................................................................................................................................................. 18
3.7 Assembly instructions............................................................................................................................................................................... 20
3.8 Connection to the flue............................................................................................................................................................................... 22
3.9 Electrical connections............................................................................................................................................................................... 24
3.10 Filling the system...................................................................................................................................................................................... 25
3.11 Hydraulic base diagrams ......................................................................................................................................................................... 26
3.12 Panel board .............................................................................................................................................................................................. 36
3.13 Panel board electrical connections........................................................................................................................................................... 41
3.14 Boiler start-up ........................................................................................................................................................................................... 42
3.15 Troubleshooting ........................................................................................................................................................................................ 44
3.16 Alarms of the electronic control board ..................................................................................................................................................... 45
3.17 Audible alarms.......................................................................................................................................................................................... 46
2 TECHNICAL FEATURES AND DIMENSIONS ...................................................................................................................................................9
2.1 Technical features......................................................................................................................................................................................... 9
2.2 Hydraulic dimensions and connections ...................................................................................................................................................... 10
2.3 Dimensions of pellet container.................................................................................................................................................................... 10
2.4 Technical data............................................................................................................................................................................................. 11
2.5 Main components ....................................................................................................................................................................................... 12
2.6 General ....................................................................................................................................................................................................... 12

4
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5
General information
1GENERAL INFORMATION
1.1 - GENERAL WARNINGS
The instruction booklet is an integral and essential part of the
product and must be kept by the system manager.
Read the warnings contained in this instruction booklet carefully
as they provide important guidelines regarding installation, use
and maintenance safety.
Keep the booklet with care for further consultation.
Your appliance must be installed and serviced in compliance
with the standards in force according to the manufacturer
instructions, up to standard and by legally qualified and
certified personnel.
Systems for the production of domestic hot water MUST be
constructed entirely with materials that comply with M.D.
174/2004 (taps, pipes, fittings, etc.).
By professionally qualified personnel we mean: personnel
with specific technical skill in the field of heating system
components for civil use, domestic hot water production
and maintenance. Personnel must have the qualifications
provided for by current legislation.
Incorrect installation or improper maintenance can cause dam-
age to persons, animals or objects for which the manufacturer
is not responsible.
Before performing any cleaning or maintenance, disconnect the
appliance from the energy mains by acting on the switch of the
system and/or through the specific cut-off devices.
Do not obstruct the terminals of the ventilation ducts.
In case of failure and/or malfunctioning of the appliance, switch
it off and do not try to repair it or intervene on it directly. Contact
only personnel qualified in compliance with law.
Any product repairs must be performed solely by personnel
authorised by Unical, using original spare parts only. Failure to
comply with the above can compromise the safety of the appli-
ance and void the warranty.
To guarantee appliance efficiency and its correct operation,
yearly maintenance must be performed by qualified personnel.
Should you decide not to use the appliance, parts entailing
potential sources of hazard must be made safe.
Should the appliance be sold or transferred to a new owner or
if you move and leave the appliance, always make sure that the
instruction manual accompanies it in order to be consulted by
the new owner and/or installer.
Only original accessories must be used for all appliances with
optionals or kits (including electric).
This appliance is intended solely for the use for which it was
expressly designed.
Any other use is to be considered improper and therefore dan-
gerous.

6
1.2 - SYMBOLS USED IN THE MANUAL
Pay special attention when reading this manual to the parts marked by the symbols:
1.3 - APPROPRIATE USE OF THE APPLIANCE
The PELLEXIA appliance has been built according to the current level of engineering and acknowledged
technical safety rules.
Nonetheless, if improperly used, dangers could arise for the safety and life of the user and other persons
or damage to the equipment or other objects.
The appliance is intended to operate in hot water circulation heating systems.
Any other use must be considered improper.
UNICAL will not be held liable for any damage resulting from improper use.
Use according to the intended purposes also includes strict compliance with the instructions in this manual.
The user must be instructed concerning the use and operation of his heating system, in particular:
• Deliver these instructions to the user, as well as other documents concerning the appliance inserted in the envelope
inside the packaging. The user must keep this documentation safe for future consultation.
• Inform the user about the importance of the air vents and the flue gas exhaust system, highlighting their essential
features and the absolute prohibition of modifying them.
• Inform the user concerning controlling the system's water pressure as well as operations to restore it.
• Inform the user concerning correct temperature control, control units/thermostats and radiators for saving energy.
• Remember it is obligatory to perform regular system maintenance and a combustion analysis once a year.
• Should the appliance be sold or transferred to a new owner or if you move and leave the appliance, always make
sure that the instruction manual accompanies it in order to be consulted by the new owner and/or installer.
The manufacturer will not be held liable in the event of damage to persons, animals or objects resulting from
failure to comply with the instructions contained in this manual.
1.4 - INFORMATION FOR SYSTEM MANAGER
NOTE!
Tips
for the user
ATTENTION!
Possible dangerous
situation for the product
and the environment
DANGER!
Serious danger for
personal safety and life

7
General information
1.5 - SAFETY WARNINGS
ATTENTION!
The appliance must be installed, adjusted and maintained by professionally qualified personnel, in com-
pliance with the standards and provisions in force. Incorrect installation can cause damage to persons,
animals and objects for which the manufacturer cannot be held responsible.
DANGER!
The boiler must be serviced or repaired by professionally qualified personnel, authorised by Unical. We
recommend stipulating a maintenance contract.
Insufficient or irregular maintenance can jeopardise the operating safety of the appliance and cause dam-
age to persons, animals and objects for which the manufacturer cannot be held responsible.
Modifying parts connected to appliance
Do not modify the following parts:
- the boiler
- the air, water and electrical current lines
- the flue gas pipe, the safety valve and the exhaust pipe
- the construction parts which affect the operating safety of the appliance
Attention!
To tighten or loosen the screwed fittings, use only appropriate fixed spanners.
Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas leakage).
Explosive and easily flammable substances
Do not use or store explosive or easily flammable materials (e.g. petrol, paints, paper) in the room where the ap-
pliance is installed.
ATTENTION!
The appliance must not be used by people with reduced physical, sensory and mental abilities, without
experience and knowledge. These people must be previously trained and supervised during manoeuvre
operations. Children must be supervised so that they do not play with the appliance.

8
1.6 - TECHNICAL DATA PLATE
The technical data plate is adhesive and is included in the
document case; it must be applied by the installer on the
outside of the casing.
The serial number of the boiler is on the riveted plaque on
the front plate of the body (front right top side).
destination Country

9
Technical features
2TECHNICAL FEATURES
AND DIMENSIONS
2.1 - TECHNICAL FEATURES
The heat generator mod. PELLEXIA is a steel boiler operating
with wood pellets, equipped with a burner fed automatically by a
feeding screw which withdraws the pellets from a tank alongside
it, with combustion chamber under negative pressure, suit-
able for household heating.
The PELLEXIA boiler is complete with all the safety and control
devices required by relevant standards.
DESCRIPTION OF COMPONENTS:
• Steel boiler body with combustion chamber partially covered
with refractory material
• Air-blown pellet burner with automatic feeding
• Three smoke circuits, with the third equipped with turbolators
• Front doors with refractory coating and flame warning light
on the burner
• Rear smoke chamber with inspection door and ash removal
door
• Smoke extraction fan
• Safety heat exchanger
• Boiler body insulated with 60 mm thick mineral wool panel
• Powder painted sheet steel casing
• Large capacity pellet tank (630 kg/950 litres)
• Recirculation pump kit (optional)
PANEL BOARD COMPONENTS:
• Main switch with light indicating presence of power
• Safety thermostat for boiler overheating
• Main fuse
• Display

10
2.2 - HYDRAULIC DIMENSIONS AND CONNECTIONS
T1
T2
T3
T4
T5
T6
T6
T5
T4 T4
T3
T7 T8
T2
1185185 550
2030 707
168
70
121
1009
183
1383
Pos.
T1
T2
T3
T4
T5
T6
T7
T8
Descrizione
Manicotto MANDATA
Manicotto RITORNO
Uscita Fumi
Attacco Scambiatore di sicurezza
Guaina per sensore Valvola Scarico Termico
Guaina per sonde
Attacco Vaso Espansione
Attacco Valvola Sicurezza
DN
2"
2"
Øe 200
3/4"
1/2"
1/2"
3/4"
1/2"
2.3 - DIMENSIONS OF PELLET CONTAINER
1000
1000
1004
1004
1430
772
Description
FLOW Sleeve
RETURN Sleeve
Flue Gas Outlet
Safety Exchanger connection
Probe sheath
Expansion Vessel Connection
Safety Valve Connection
Temperature Relief Valve sensor sheath

11
Technical features
MODELS PELLEXIA 80
EFFECTIVE NOMINAL OUTPUT* (kW) 72.2
FURNACE MIN/MAX OUTPUT (kW) 23.9/80.1
WATER SIDE PRESSURE DROPS (10K)*
WATER SIDE PRESSURE DROPS (20K)*
BOILER WATER CONTENT
EMPTY BOILER WEIGHT
MAXIMUM OUTPUT Qn/Qmin
OUTPUT IN STAND-BY
BOILER CLASS ACCORDING TO EN 303-5
[mbar] 11.25
2.83
[mbar]
(l)
(kg)
(W)
(W)
110
516
500/480
30
5
COMBUSTION AUTONOMY (at Qn)
PELLET STORAGE VOLUME
MAX OPERATING PRESSURE
(h) 40
950
(l)
(bar) 3
NOISE LEVEL (dB) <50
MINIMUM DRAUGHT REQUIRED BY CHIMNEY (Pa) 15
MIN. FLOW TEMPERATURE (°C) 75
MAX. FLOW TEMPERATURE (°C) 85
MIN. RETURN TEMPERATURE (°C) 55
FLUE GAS TEMPERATURE Qn/Qmin (°C) 170/93
NOMINAL LOADING FLUE GAS MASS FLOW RATE (kg/h) 147.916
EFFICIENCY (%) 90.18
O2 (%) 7.6/11.5
CO2 (%) 13/9
2.4 - TECHNICAL DATA
CO 10% (mg/Nm3) 102.6/217.1
CO 13% (mg/Nm3) 74.6/157.9
NOx 10% (mg/Nm3) 168.3/213.6
NOx 13% (mg/Nm3) 122.4/155.4
Hc 10% (mg/Nm3) 2.7/3.8
Hc 13% (mg/Nm3) 2.0/2.8
Dust 10% (nominal output) (mg/Nm3) 14.0
Dust 13% (nominal output) (mg/Nm3) 10.1
FUEL CHARACTERISTICS See par. 2.6
THERMAL STORAGE VOLUME
(Recommended)
(l) > 1600
MAX. SUPPLY WATER TEMPERATURE
SAFETY HEAT EXCHANGER
(°C) 15
SUPPLY WATER PRESSURE
SAFETY HEAT EXCHANGER
(bar) 2
BOILER OPERATION WITH FAN
COMBUSTION CHAMBER OPERATION UNDER NEGATIVE PRESSURE
OPERATION IN CONDENSATION NO
DIMENSIONS OF THE LOADING DOOR 1000 x 1000
(mm)
Pellet CONSUMPTION Qn/Qmin 16.0/4.78
(kg/h)
* Pressure drops for flow rate corresponding to a thermal variation of 15K.
** Values calculated based on the Law 10/91 for residential homes with a heat requirement of 30 kcal/hm³. The data shown is indicative.
The results in the table have been obtained using certified pellets based on the standards EN 14961-2.
PELLET STORAGE CAPACITY 630
(kg)
MAX HEATABLE VOLUME ** 2070
(m3)

12
2.5 - MAIN COMPONENTS
1. Panel board
3. Fan
4. Top cover
5. Boiler casing side
7. Safety heat exchanger
8. Smoke chamber
9. Smoke chamber inspection door
2.6 - GENERAL
The main feature of the PELLEXIA heat stove is that of burning
natural fuel (pellets) obtained in an environmentally-friendly way
from wood industry waste (sawdust, powders).The sawdust and
powders coming from wood processing, after having been ap-
propriately cleaned and dried, are compacted at high pressure
to create pure wood cylinders: pellets.
The main features of the pellet are its low moisture content
(lower than 10%), its high density (> 600 kg/m3) as well as its
regularity and compactness providing to this type of fuel a high
Net Calorific Value.
In order to provide PELLEXIA with a long lifespan, Unical advises
using certified pellets.
The pellets used to feed the boiler must have high quality fea-
tures such as, for example, those determined by the standard
EN 14961-2. The following are some of their fundamental data.
11. Pellet fire prevention Klixon thermostat
13. Burner feeding hose
14. Pellet clogging sensor
15. Boiler top door
16. Burner
17. Boiler bottom door
18. Heat exchange fin with turbulators
19. Intermediate refractory stones
20. Ash collection pan
22. Furnace base insulation
M Heating system flow
R Heating system return

13
Technical features
bustion efficiency and conserves the moving mechanical parts
of the appliance.
If you plan on not using the PELLEXIA boiler
for a long period of time (seven days or more),
you should remove any residual fuel in the
tank which, if left inside, could gather mois-
ture and cause the product to malfunction.
A high moisture content in the pellet can
cause it to break up into powder generating
a greater accumulation of residue in the brazier
and a blocking of the fuel feed system (feeding
screw).
The pellets, as foreseen by current
Italian legislation governing commodity
features of fuels (DPCM 2.10.1995), must
be produced exclusively with untreated
wood sawdust without other materials
added.
It is absolutely forbidden to use any solid
or liquid fuel other than pellets to feed
PELLEXIA.
It is advisable to use certified pellets to ensure
optimal use of PELLEXIA.
The use of poor quality pellets can cause
PELLEXIA malfunctioning and shall terminate
the warranty.
Storage and handling of pellets are important
operations to be performed with care:
- The fuel must be stored in a dry place which is not cold;
- Pellets must be moved in such a way to avoid excessive crush-
ing into fine powders.
Compliance with these two simple rules provides better com-
Parameter
Diameter (D)
Length (L)
Water content (M)
Ashes (A)
Mechanical durability (DU)
Fine particles (< 3.15 mm)
Additives
Lower Calorific Value (Q)
Bulk density (BD)
Nitrogen (N)
Sulphur (S)
Chlorine (Cl)
Arsenic (As)
Cadmium (Cd)
Chromium (Cr)
Copper (Cu)
Lead (Pb)
Mercury (Hg)
Nickel (Ni)
Zinc (Zn)
Melting point of the ashes (DT) 4
M.U.
mm
mm
%dm 2
%dm 2
%us
%us
%dm
MJ/kg us
kg/m3
%dm
%dm
%dm
%dm
%dm
%dm
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
°C
EN plus-A1 EN plus-A2
6 (±1)
31.5 ≤L ≤40 1
≤10 ≤10
≤0.7 ≤1.5
≥ 97.5 ≥ 97.5
< 1 < 1
≤2 ≤2
16.5 ≤ Q ≤ 19 16.3 ≤ Q ≤ 19
≥600 ≥600
≤0.3 ≤0.5
≤0.03 ≤0.03
≤0.02 ≤0.02
< 1 < 1
≤0.5 ≤0.5
≤10 ≤10
≤10 ≤10
≤10 ≤10
≤10 ≤10
≤10 ≤10
≤100 ≤100
≥1200 ≥1100
1) Maximum 1% of pellets with length greater than 40 mm. Maximum length 45 mm.
2) us = unaltered state, dm = dry matter
3) Determination at 550°C
4) In this case, the ashes must be produced at 815°C

14
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15
Installation instructions
3INSTRUCTIONS FOR
INSTALLATION
3.1- GENERAL WARNINGS
ATTENTION!
This boiler is intended solely for the use for
which it was expressly designed. Any other
use is to be considered improper and there-
fore dangerous.
This boiler heats water at a temperature
lower than the atmospheric pressure boiling
temperature.
ATTENTION!
The appliances are designed to be installed
inside suitable rooms or technical spaces
only. The appliances cannot be installed or
operate outdoors. Outdoor installation can
cause malfunctioning and be dangerous.
Choose specifically designed appliances for
outdoor installation.
Before connecting the boiler, have professionally
qualified personnel:
a) Thoroughly wash all the piping of the system
to remove any residue or impurities which
could jeopardise proper operation of the
boiler;
b) Check that the chimney/flue has an appropri-
ate draught, without any bottlenecks, and that
no exhausts from other appliances are in-
serted, unless the flue has been implemented
to accommodate several utilities according to
specific standards and prescriptions in force.
Only after this check can the fitting between
the boiler and chimney/flue be mounted;
ATTENTION!
The appliance must be installed by a qualified
technician with the technical-professional
requirements according to law 37/08 which,
under his own responsibility, guarantees
compliance with the standards according to
good practice rules.
The boiler must be connected to a central heat-
ing system and/or domestic hot water production
network compatible with its efficiency and output.
3.2 - INSTALLATION STANDARDS
It must be installed by a professionally qualified technician, who
shall take the responsibility of observing all local and/or
national laws published in the official journal, as well as
applicable technical standards.
3.3 - INSTALLATION ON
OLD OR RETROFITTABLE SYSTEMS
Before installing this appliance on old systems, check that:
- The flue is able to withstand the temperature generated by
the combustion products, has been measured and designed
according to the regulations in force, is airtight and insulated,
and does not feature obstructions or constrictions.
- The flue has a device for releasing condensation.
- The electrical system has been set up by a qualified techni-
cian in compliance with the rules in force.
- The rate, head and direction of the flow of the circulation
pumps are appropriate.
- The expansion vessel(s) can fully absorb dilation of the
fluid in the system.
- The expansion vessels can fully absorb dilation of the fluid
in the system.
- The system has been cleaned and cleared of all sludge
and scale, has been vented, and all its seals have been
checked.
- There is a water supply treatment/recirculation system.

16
3.4 - PACKAGING
The PELLEXIA boiler is delivered already encased on a pallet
together with other boxes containing the pellet tank, the panel
board and the pellet feeding screw, all protected with heat shrink
plastic film. The boxes containing the panel board are placed
inside the furnace, as are the accessories for assembly and
for cleaning.
After having removed all packaging, make sure that
the supply is complete and undamaged.
If in doubt, do not use the appliance and contact
the supplier.
To handle the boiler and to remove the pallet below,
fasten the upper hook intended for this purpose
using appropriate lifting systems (below the cas-
ing cover).
The packaging elements (cardboard boxes,
straps, plastic bags, etc.) must be kept out of
the reach of children as they are potential
sources of danger.
Unical will not be held liable for damage to persons, animals
or objects due to failure to comply with the instruction above.
The document envelope, inserted in the furnace, contains:
- Hydraulic test certificate
- Heating system log book
- Installation, use and maintenance instruction manual
- Warranty
- Local ventilation requirements adhesive label
If the boiler is stored for long periods, it should be ad-
equately protected.
Description of packs:
1. Boiler body
2. Packing containing pellet tank
3. Pellet feeding screw
4. Panel board (supplied inside the furnace)

17
Installation instructions
3.5 - INSTALLATION
PELLEXIA is a heat generator which withdraws the combustion
air required for the combustion process directly from the environ-
ment in which it is installed.
For this reason, and above all for the safety of the persons us-
ing PELLEXIA, it must be installed in a ventilated area so that a
continuous flow of combustion air is always guaranteed.
It is therefore essential to make air vents linked with the outside
which, in compliance with that indicated by Standard UNI 10683,
have the following features:
1. A free width of 100 cm or more2, ensuring at least that pres-
sure in the installation area does not exceed 4 Pa;
2. Be made close to the floor;
3. Be appropriately protected by metallic mesh or grille so that
the minimum air passage cross-section is not reduced;
4. Be positioned in such a way that it cannot be obstructed.
The correct air influx can also be guaranteed
by using openings towards an adjacent room
as long as that room is provided with direct
ventilation and that it is not a room with a fire
risk such as depots, garages or storerooms
as regulated by standard UNI 10683.
PELLEXIA should be installed in rooms without natural draught
equipment or appliances which can create a vacuum in the room
in relation to the outside environment and therefore hinder the
draught of the flue gas exhaust system (UNI 10683).
To make it easier to clean, there must be a clearance space
in front of the heat stove no less than the length of the stove
itself. You must at least make sure that the door can open 90°
unobstructed.
PELLEXIA can be placed directly on the floor as it is equipped
with a self-supporting frame.
When inspecting compatibility of the heating
system, you should make sure that the support
surface (floor) has a support capacity (kg) suit-
able to bear the weight of the product. If it is not
adequate, suitable safety measures should be
taken (e.g. load distribution plate).
Furthermore, should the floor be made of combustible material
(such as parquet) it should be protected by placing a sheet of
fireproof material underneath PELLEXIA which is sufficiently
wider than the base.
When installation has been performed, the boiler must be hori-
zontal and stable, in order to reduce vibrations and noise.
However clearance space must be left behind the boiler and on
both sides to allow the casing to be opened for maintenance.
There must also be sufficient clearance for loading the pellet tank.
Do not approach or touch the outer surfaces of the combus-
tion chamber with flammable material as it can reach high
temperatures following continuous use.

18
3.6.1 - CONNECTION TO THE
SAFETY HEAT EXCHANGER
Solid fuel fired boilers must be installed
with the safety devices foreseen by the
relevant laws in force.
For this purpose PELLEXIA boilers are
equipped with a safety exchanger.
A thermal discharge valve must be installed on the safety heat
exchanger by the installation technician, with a control bulb set
up inside the sheath located on the rear side of the PELLEXIA
boiler.
Attention!
The input or output can be inverted as long as
the valve is installed on the cold water intake.
Provide a drain pipe with a funnel and a siphon
leading to an appropriate drainage at the heat exchanger outlet.
This drainage must be controlled on sight.
Attention!
If this precaution is not taken, triggering of the
thermal discharge valve can cause damage
to persons, animals and objects for which
the manufacturer cannot be held responsible.
SCARICO
2
ALIMENTAZIONE
1
3.6 - HYDRAULIC CONNECTIONS
ATTENTION!
Before connecting the boiler to the heating
system, thoroughly clean the piping with an
appropriate product compliant with UNI-CTI
8065, in order to eliminate metallic residue
from processing and welding, oil and grease
which could be present and which, reaching
the boiler, could alter its functioning.
Attention!
The fittings of the boiler must not take the
weight of the connecting pipes of the sys-
tem; suitable supporting devices should be
installed to do this.
The dimensions of the supply and return pipes for each boiler
model are given in the DIMENSIONS table.
Check that the system is fitted with a sufficient number of vent
valves.
POWER SUPPLY
DRAIN
DRAIN
DRAIN
POWER SUPPLY
POWER SUPPLY
CORRECT
INSTALLATION
INCORRECT
INSTALLATION

19
Installation instructions
3.6.2 - RECIRCULATION PUMP
For correct generator operation, a recirculation pump must
be installed in the boiler.
The recirculation pump, supplied in an optional kit, must be
connected as indicated in the figure.
If it is not installed, besides limiting the boiler's lifespan, it
will invalidate the warranty.
ATTENTION!
The hardness of the mains water supply conditions the
boiler's lifespan.
Depending on the hardness of the mains water supply, the
possibility of installing appropriate domestic water soften-
ers has to be taken into consideration in compliance with
DM n° 443 of 21/12/90.
It is always recommended to treat water with a
hardness greater than 15°f.

20
3.7 - ASSEMBLY INSTRUCTIONS
IMPORTANT!
Before beginning the casing work, perform the hydraulic testing of the boiler and of the plant connected to it.
When installing the boiler, consider the size of the pellet tank on the left side (refer to the dimensions on page 10)
and leave sufficient space for loading pellets in this tank.
As an indication, there should be a clearance of no less than 1000 mm between the boiler and any wall on
the left side for standing next to the tank and to fill it easily.
Assemble the expansion vessel.
3
2
1
Assembly of internal components
A) Check the correct position of the grate pos. 1.
B) Position the refractory stones pos. 2 in the upper part of the
furnace.
C) Check that the smoke deflectors pos. 3 are fitted correctly in
place.