Unical FIREX 2S Installation guide

Brand: Unical

Model: FIREX 2S

Type: Installation guide

INSTALLATION AND MAINTENANCE INSTRUCTIONS

FIREX 2S

34 - 45 - 55

1 GENERAL INFORMATION .................................................................................................................................................................................4

1.1 General warnings .......................................................................................................................................................................................... 4

1.2 Symbols used in the manual ......................................................................................................................................................................... 5

1.3 Appropriate use of appliance ........................................................................................................................................................................ 5

1.4 Information for the user ................................................................................................................................................................................. 5

1.5 Safety warnings ............................................................................................................................................................................................. 6

1.6 Technical data plate ......................................................................................................................................................................................7

General informationTechnical FeaturesInstallation instructionsMaintenance instructions

4 INSPECTION AND MAINTENANCE ................................................................................................................................................................52

Inspection and maintenance instructions ...........................................................................................................................................................52

Boiler body maintenance ................................................................................................................................................................................... 53

Cleaning and routine maintenance ..................................................................................................................................................................... 53

Maintenance operations .....................................................................................................................................................................................53

3 INSTRUCTIONS FOR THE INSTALLER ................................. 18

3.1 General warnings ............................................................. 18

3.2 Installation standards ....................................................... 18

3.3 Installationonoldorretrottablesystems ........................ 18

3.4 Packaging ........................................................................ 19

3.5 Transportation .................................................................. 19

3.6 Installation ....................................................................... 20

3.7 Connecting boiler to system .............................................21

3.8 Hydraulic connections .....................................................21

3.9 Chimney connection ........................................................26

3.10 Electrical connections ...................................................... 29

3.11 Connections .................................................................... 30

3.12 Hydraulic base diagrams .................................................31

3.13 Panel board ..................................................................... 38

3.14 Filling the system .............................................................44

3.15 Boiler start-up ................................................................... 45

3.16 Summer mode ................................................................. 48

3.17 Warnings.......................................................................... 48

2 TECHNICAL FEATURES AND DIMENSIONS ...................................................................................................................................................8

2.1 Technical features ......................................................................................................................................................................................... 8

2.2 Dimensions and hydraulic connections ......................................................................................................................................................... 9

2.3 Technical data ............................................................................................................................................................................................. 10

2.4 Main components ....................................................................................................................................................................................... 14

2.5 General Information .................................................................................................................................................................................... 14

2.6 Features of the wood ...................................................................................................................................................................................17

3.18 Eliminating faults .............................................................. 49

3.19 Alarm diagram and troubleshooting ................................. 50

3.20 Audible alarms ................................................................. 51

1.2 - SYMBOLS USED IN THE MANUAL



1.3 - APPROPRIATE USE OF THE APPLIANCE

The

technical safety rules.



damage to the appliance or other property.

The appliance is designed 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 on use and operation of the 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. .

• Informtheuserabouttheimportanceoftheairventsandtheuegasexhaustsystem,highlightingtheiressential

features and the absolute prohibition of modifying them.

• Informtheuseronhowtocontrolthesystem'swaterpressureaswellasoperationstorestoreit.

• Informtheuseroncorrecttemperaturecontrol,controlunits/thermostatsandradiatorsforsavingenergy.

• Rememberthatthesystemmustreceiveregularmaintenanceatleastonceayearandacombustionanalysismust

be performed every two years (as per national law).

• 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 the appliance so that it can be consulted by the new owner and/or

installer.



failure to comply with the instructions contained in this manual.



NOTE!

Tips

for the user

ATTENTION!

Possible dangerous

situation for the product

and the environment

DANGER!

Serious danger for

personal safety and life



ATTENTION!

-



animals and property for which the manufacturer will not be held liable.

DANGER!



recommend stipulating a maintenance contract.

-



Modifying parts connected to the appliance

Do not modify the following parts:

- the boiler

- the air, water and electrical current lines

- theuegaspipe,thesafetyvalveandtheexhaustpipe

- theconstructionpartswhichaecttheoperatingsafetyoftheappliance

Attention!

Useonlyappropriatexedspannerstotightenorloosenthescrewedttings.

Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas leakage).



Donotuseorstoreexplosiveoreasilyammablematerials(e.g.petrol,paints,paper)intheroomwheretheappli-

ance is installed.

ATTENTION!





operations. Children must be supervised so that they do not play with the appliance.



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 bottom side).

Key

Destination country

TECHNICAL FEATURES

AND DIMENSIONS

2.1 - TECHNICAL FEATURES

The heat generator mod. FIREX 2S is a steel boiler running with

naturalwoodenlogs,totalgasication,ameinverted,withthe

combustion chamber under negative pressure.

It is supplied in the following models:

FIREX 2S 34

FIREX 2S 45

FIREX 2S 55

DESCRIPTION OF COMPONENTS:

• Steelboilerbodywithcombustionchamberpartiallycovered

with refractory material

• Burnerinrefractorymaterial

• Horizontalsmokeducts

• Frontdoorforloadingwoodcoveredwithrefractorymaterial

• Bottomdoorcoveredwithrefractorymaterial,completewith

combustionairadjustmentsandttedwithamesightglass

• Rearsmokechamberwithsideinspectionandashremoval

doors

• Fluegasextractionwithintakemodulatingfan

• Safetyheatexchanger

• Boilerbodyinsulatedwith50mmthickmineralwoolpanels

• Powderpaintedsheetsteelcasing

PANEL BOARD COMPONENTS:

• Mainswitchwithlightindicatingpresenceofvoltage

• Safetythermostatforboileroverheating

• Generalfuse

• Display

2.2 - HYDRAULIC DIMENSIONS AND CONNECTIONS

1. Panel board

2. Primary air adjustment

3. Secondary air adjustment

4. Flame sight glass

5. Cleaning doors

6. Rear smoke chamber

7. Loading door

8. Modulating fan

9. Bottom inspection and cleaning door

DIMENSIONS

510

680

610

680

610

880

1230 1380

190

1025

628

1380

190

11501150

628 828

(mm)

CONNECTIONS

T1 - T2

T3 - T4 - T7 - T8

UNI ISO 228/1

(Ø mm)

UNI ISO 228/1

G 1¼

150

G ½

G 1½

200

G ½

UNI ISO 228/1

65 65

(mm)

G 1½

200

G ½

FIREX 2S 34 FIREX 2S 45 FIREX 2S 55

T1. Centralheatingow

T2. Central heating return

T3. Safetythermostatprobebulbholder,boilerowprobe

T4. Connection for any temperature relief valve probe bulb

holder

T5. Chimney connection

T6. Safety heat exchanger connections

T7. Boiler drain

T8. Return probe connection

T7T8

FIREX 2S 34 FIREX 2S 45 FIREX 2S 55MODELS

MAXIMUM NOMINAL OUTPUT*

(kW)

30.6 40.1 49.10

FURNACE MAXIMUM OUTPUT

(kW)

34.2 45.0 55.16

* Powerachievedwithgoodqualitywoodcontaining15%humidity.

** Consideringathermalpowerrequirementof34kcal/m

WATER SIDE PRESSURE DROPS (10K)

WATER SIDE PRESSURE DROPS (20K)

BOILER WATER CONTENT

EMPTY BOILER WEIGHT

MAXIMUM OUTPUT

OUTPUT IN STAND-BY

BOILER CLASS ACCORDING TO EN 303-5 (2012)

(m.w.c. - Pa)

0.2 - 1961 0.4 - 3922 0.5 - 4903

0.07 - 4860.07 - 4860.05 - 490

(m.w.c. - Pa)

(l)

(kg)

(W)

363

146

475

146

623

146

5 5 5

DURATION OF COMBUSTION

WOOD STORAGE VOLUME

MAX OPERATING PRESSURE

LOADING OPENING

LOG LENGTH

(h)

5 6 6

218160108

(l)

(bar)

(mm)

(cm)

334 x 419

434 x 519

NOISE LEVEL

(dB)

<50 <50

<50

MINIMUM DRAUGHT REQUIRED BY CHIMNEY

(Pa)

20 20 20

MIN. FLOW TEMPERATURE

(°C)

70 70 70

MAX. FLOW TEMPERATURE

(°C)

85 85 85

MIN. RETURN TEMPERATURE

(°C)

55 55 55

NOMINAL LOADING FLUE GAS TEMPERATURE

(°C)

171 177

178

NOMINAL LOADING FLUE GAS MASS FLOW RATE

(kg/s)

0.02 0.026

0.032

EFFICIENCY

(%)

89.5 89.1 89.1

(%)

4.73 5.10 6.10

CO2

(%)

13.9 13.74 13.6

2.3 - TECHNICAL DATA

CO 10%

(mg/Nm

)

361 469 367

CO 13%

(mg/Nm

)

262 341 267

NOx 10%

(mg/Nm

)

180 183 189

NOx 13%

(mg/Nm

)

131 133 137

Hc 10%

(mg/Nm

)

1.1 10 11

Hc 13%

(mg/Nm

)

0.8 7.3 8

Dust 10%

(mg/Nm

)

27 25 27

Dust 13%

(mg/Nm

)

19 18 19

FUEL CHARACTERISTICS

See par. 2.7

THERMAL STORAGE VOLUME (Recommended)

(If Qmin > 30% of Qn)

(l)

1256 1682 2089

MAX. FEED WATER TEMPERATURE

SAFETY HEAT EXCHANGER

(°C)

15 15 15

FEED WATER PRESSURE

SAFETY HEAT EXCHANGER

(bar)

1.5 1.5 1.5

BOILER OPERATION

WITH FAN

COMBUSTION CHAMBER OPERATION

UNDER NEGATIVE PRESSURE

OPERATION IN CONDENSATION

MAXIMUM HEATABLE VOLUME **

)

876 1149 1408

2.3.1 - TECHNICAL DATA ACCORDING TO ErP DIRECTIVE

FIREX 2S 34

Fuel Preferred fuel

(only one):

Others

suitable fuels:

Seasonal emissions

mg / m³ 10%

PM OGC CO NOX

Logs moisture content ≤ 25 % X 27 1.1 361 180

Chips, moisture content 15-35 %

Chips, moisture content > 35 %

Compressed wood in the form of

pellets or briquettes

Sawdust, moisture content ≤ 50 %

Other wood biomass

Non-wood biomass

Bituminous coal

Lignite (including briquettes)

Coke

Anthracite

Briquettes of fossil fuel mixture

Other fossil fuels

Briquettes of biomass mixture (30-70 %)

and fossil fuels

Other mixtures of biomass and fossil fuels

Commission Delegated Regulation (EU) 2015/1187 of 27 April 2015 supplementing Directive 2010/30/EU with regard to the

energy labelling of solid fuel boilers and packages of a solid fuel boiler, supplementary heaters, temperature controls and solar

devices (1).

Operating characteristics with preferred fuel:

Seasonal energy eciency of central heating ηs [%]:

Energy eciency index EEI:

117

Entry Symbol Value U.M. Entry Symbol Value U.M.

Eective heat Output Useful Eciency

At nominal

heat output

30.62 kW

At nominal heat

output

83.4 %

At [30 %/50 %] of

nominal heat output, if

pertinent

n.p kW

At [30 %/50 %] of

nominal heat output,

if pertinent

n.p %

For solid fuel cogeneration boilers:

Electrical eciency

Auxiliary electricity consumption

At nominal heat

output

max

0.146 kW

At nominal heat output η

el,n

n.p %

At [30 %/50 %] of

nominal heat output,

if pertinent

min

0.000 kW

If required, integrated equipment

for the abatement of secondary

emissions

n.p. kW

Standby mode P

0.005 kW

FIREX 2S 34

Manual loading type

Manual loading puer volume l. 1256 Automatic loading puer volume l. 612

Non-condensation boiler type

Cogeneration NO

Combined boiler NO

FIREX 2S 45

Fuel Preferred fuel

(only one):

Others

suitable fuels:

Seasonal emissions

mg / m³ 10%

PM OGC CO NOX

Logs moisture content ≤ 25 % X 25 10 469 183

Chips, moisture content 15-35 %

Chips, moisture content > 35 %

Compressed wood in the form of

pellets or briquettes

Sawdust, moisture content ≤ 50 %

Other wood biomass

Non-wood biomass

Bituminous coal

Lignite (including briquettes)

Coke

Anthracite

Briquettes of fossil fuel mixture

Other fossil fuels

Briquettes of biomass mixture (30-70 %)

and fossil fuels

Other mixtures of biomass and fossil fuels

Entry Symbol Value U.M. Entry Symbol Value U.M.

Eective heat Output Useful Eciency

At nominal

heat output

40.1 kW

At nominal heat

output

82.9 %

At [30 %/50 %] of

nominal heat output, if

pertinent

n.p kW

At [30 %/50 %] of

nominal heat output,

if pertinent

n.p %

For solid fuel cogeneration boilers:

Electrical eciency

Auxiliary electricity consumption

At nominal heat

output

max

0.146 kW

At nominal heat output η

el,n

n.p %

At [30 %/50 %] of

nominal heat output,

if pertinent

min

0.000 kW

If required, integrated equipment

for the abatement of secondary

emissions

n.p. kW

Standby mode P

0.005 kW

FIREX 2S 45

Manual loading type

Manual loading puer volume l. 1682 Automatic loading puer volume l. 802

Non-condensation boiler type

Cogeneration NO

Combined boiler NO

Operating characteristics with preferred fuel:

Seasonal energy eciency of central heating ηs [%]:

Energy eciency index EEI:

116

FIREX 2S 45

Fuel Preferred fuel

(only one):

Others

suitable fuels:

Seasonal emissions

mg / m³ 10%

PM OGC CO NOX

Logs moisture content ≤ 25 % X 27 11 367 189

Chips, moisture content 15-35 %

Chips, moisture content > 35 %

Compressed wood in the form of

pellets or briquettes

Sawdust, moisture content ≤ 50 %

Other wood biomass

Non-wood biomass

Bituminous coal

Lignite (including briquettes)

Coke

Anthracite

Briquettes of fossil fuel mixture

Other fossil fuels

Briquettes of biomass mixture (30-70 %)

and fossil fuels

Other mixtures of biomass and fossil fuels

Entry Symbol Value U.M. Entry Symbol Value U.M.

Eective heat Output Useful Eciency

At nominal

heat output

49.1 kW

At nominal heat

output

82.9 %

At [30 %/50 %] of

nominal heat output, if

pertinent

n.p kW

At [30 %/50 %] of

nominal heat output,

if pertinent

n.p %

For solid fuel cogeneration boilers:

Electrical eciency

Auxiliary electricity consumption

At nominal heat

output

max

0.146 kW

At nominal heat output η

el,n

n.p %

At [30 %/50 %] of

nominal heat output,

if pertinent

min

0.000 kW

If required, integrated equipment

for the abatement of secondary

emissions

n.p. kW

Standby mode P

0.005 kW

FIREX 2S 55

Manual loading type

Manual loading puer volume l. 2089 Automatic loading puer volume l. 982

Non-condensation boiler type

Cogeneration NO

Combined boiler NO

Operating characteristics with preferred fuel:

Seasonal energy eciency of central heating ηs [%]:

Energy eciency index EEI:

116

2.4 - MAIN COMPONENTS

2.5 - GENERAL INFORMATION

1. Panel board

2. Top cover

3. 2 side panels

4. Anti-smoke door

5. Woodstoragedoorwithrefractorymaterialandgasket

6. Primary and secondary air adjustment unit

7. Fan

8. Combustionchamberdoorwith

 refractorymaterial,gasket,amesightglass

9. Steel combustion chamber

10.Heatexchangen

11. Boiler drain

12. Safety heat exchanger

13.Boilerbodyinsulationinmineralwool

14. Steel boiler body

15.Burnerbuiltwithrefractorymaterialwithbarsandgrate

16. Smoke chamber

17. By pass

M Heatingsystemow

R Heating system return

N.B.:Therebarsandtherefractorysteelgratearesubjecttowear;itisthereforead-

visable to carry out an annual inspection to prevent faulty boiler operation.



FLAME COMBUSTION

Everybody knows that to make a match last it must be held with

its head upwards. This is because in its convective motion, the

amemustnotmeetfuelotherthanthatwhichhasgeneratedit.

As in residential heating the fuel is usually in the form of wood

logswhichareloadedfromthetop,theamehastogointhe

opposite direction, i.e. downwards.

Natural draught is a source of negative pressure which varies

greatly depending on the type of chimney, on weather conditions,

on the type of fuel, etc.

Therefore, it is necessary to integrate it with a forced ventilation

unittostabiliseitseects.

Byttingafan,itispossibletoconsiderablyreducethesectionof

the gas ducts on the grate and, furthermore, there are no problems

with cold chimney starts.

The small grate permits more controlled passage of combustion

air, contrarily to what happens with large traditional grates.

The air can be perfectly adjusted because the grate, covered

with burning wood, has the same crossing resistance and thus

combustion will always be optimal.

FIREX 2S BOILER STRUCTURE

The boiler body is composed of two oval elements placed one

inside the other so that a water cavity is created between the two.

The large capacity wood storage has a special thermal and

mechanical high resistance refractory press, for the purpose of

keeping the bypass area dry in all operating conditions.

The following parts can be distinguished:

1. Wood storage, drying zone

2. Gasicationzone

3. Embers zone

4. Burner in refractory material

5. Combustion chamber

6. Heat exchange surface

7. Cradle in refractory material

8. Boilerwater

9. Safety heat exchanger

M Systemhotwaterow

R System return

GASIFICATION ZONE (2)

Gasicationtakesplace in the lowerpart of the woodstorage

compartment.

Itisveryimportantforgasicationtobeasregularaspossible,

so as not to overload the burner with gas.

Gasicationspeeddependsontheamountoffuelandthesize

of the drying area. Generally, it is better to use large logs if they

are dry and small logs if the wood is moist. The quantity of pri-

mary air, proportional to the delivered output, is regulated via the

adjustment system.

EXCHANGE SURFACE (6)

Operating on wood and without very high sulphur percentages,

itisimportanttoachieveverylowuetemperaturestoimprove

watereciency.Accordingly,adry-passageexchangesurface

wasadopted,whichisalreadywelltestedfordiesel-redboilers

operatingwith lowtemperaturewater, providinglowue gas

temperatures without the risk of condensation.

The surfaces of the dry ducts "A" feature cuts, to avoid dilation

issues.

The solid combustion residues (ashes), laid on the high tem-

perature refractory cradle will become, over time, increasingly

lighter until they are carried by the gas speed and deposited in

the lowest area of the rear smoke chamber, from which they will

be removed during cleaning.



Wood is formed mainly by cellulose and lignite. It

alsocontainsothersubstances,suchasresin(r-

pine), tannin (oak - chestnut) and, obviously, a large

quantity of water.

Good quality woods are oak, ash, beech, maple

andfruittrees,exceptcherry;mediumqualitywood

is:chestnutandbirch;sucientqualitywood:lime

tree, poplar and willow. Resinous trees are, normally,

second-rate quality fuels.

Wood is therefore an extremely heterogeneous

fuel, due to dierent essences (beech, oak, fruit,

resinous),dierent moisture content, and due to

dierentshapesanddimensions.

 Boiler operation will inevitablybe eected by all

these factors. Especially by the log dimensions, the

moisture content and the way wood is loaded in the

boiler.



The caloric value of the dierent types of wood

depends on their moisture content, as illustrated in

the table. Boiler output and autonomy will diminish as

the moisture increases. The table provides the power

reduction factor based on the moisture of the wood

being used. The heat output of the FIREX 2S boiler

is calculated for wood with a 17% moisture content.

As an example, wood which has been dried for

2 years in a sheltered area has a 25% moisture

content.

Example:

moisture of the wood being used = 25%

output = nominal output x 0.86

Correction factors for wood moisture

% OF

HUMIDITY

CALORIFIC

VALUE

kWh/kg

CORRECTION

FACTOR

4.50

4.18

3.87

0.93

0.86

DIMENSIONS

The dimensions, together with the moisture content,

contribute to determine the boiler’s output. Small

pieces (with a length, however, conforming to indi-

cationsindicatedhereby)aremoreeasilyammable

and therefore have the tendency to increase the

boiler’s output and therefore to reduce its auton-

omy. Moreover, they fall with greater facility, in the

lower chamber, reducing the risk of the formation of

“bridges”. The so-called “bridge” is an empty space

in the wood storage compartment, where unburnt

wood logs remain. In this case, the bed of embers

is not fed with continuity and the refractory burner’s

slot is uncovered. In these conditions, preferential

airductsarecreatedwithaverysmallamedueto

an excess of air.

CALORIFIC

VALUE

MJ/kg

16.20

15.05

13.93

INSTRUCTIONS FOR

INSTALLATION



ATTENTION!

This boiler is intended solely for the use it

was expressly designed for. Any other use

is to be considered improper and therefore

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.



outdoor installation.

Before connecting the boiler, have professionally

qualied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/uehasan

appropriate draught, without any bottlenecks,

and that no exhausts from other appliances are

inserted,unlesstheuehasbeenimplement-

ed to accommodate several utilities according

to specific standards and prescriptions in

force.Onlyafterthischeckcanthettingbe-

tweentheboilerandchimney/uebemounted;

ATTENTION!

The appliance must be installed by a qual-

    -

sional requirements according to Italian

     

 

with the standards according to good prac-

tice rules.

The boiler must be connected to a central heating

system and/or domestic hot water production

networkcompatiblewithitseciencyandoutput.

3.2 - INSTALLATION STANDARDS

Itmustbeinstalledbyaprofessionallyqualiedtechnician,who





applicable technical standards.

3.3 - INSTALLATION ON

OLD OR RETROFITTABLE SYSTEMS

Before installing this appliance on old systems, check that:

- The chimney is able to withstand the temperature generated

by the combustion products, has been measured and de-

signed according to the regulations in force, is airtight and

insulated, and does not have any obstructions or constrictions.

- The chimney has a connection for draining condensation.

- Theelectricalsystemhasbeensetupbyaqualiedtechnician

in compliance with the rules in force.

- Therate,head and directionof the owof the circulation

pumps are appropriate.

- The expansion vessel(s) can fully absorb any dilation of the

uidinthesystem.

- Theexpansionvesselscanfullyabsorbdilationoftheuidin

the system.

- The system has been cleaned and cleared of all sludge

and scale, has been vented, and all of its seals have been

checked.

- There is a treatment system for feed/recirculation water.

3.4 - PACKAGING

FIREX 2S boilers are delivered unassembled: the casing, fan,

panel board, handles and cleaning accessories are all shipped

in separate boxes.

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.

Keep the packaging material (cardboard boxes,

straps, plastic bags, etc.) out of the reach of

children as they are potential sources of

danger.

Unical will not be held liable for damage to per-

sons, animals or objects due to failure to comply

with the instruction above.

3.5 - TRANSPORTATION

To make boiler transport, loading and unloading easier, it features

special "G" hooks on the top for lifting.

The document envelope, inserted in the wood storage compart-

ment, contains:

- Hydraulictestcerticate

- User/System manager instruction manual

- Installation and maintenance instruction manual

- Warranty

- Coupons for returned spare parts

- Technical data adhesive label



be adequately protected.

Description of packs:

1. Boiler body

2. Package containing casing and boiler insulation

3. Package containing casing and smoke chamber insulation

4. Package containing the panel board

5. Packagecontainingtheuegassuckingfan

6. Package containing: air intake header, smoke chamber inspec-

tioncovers,turbulators,handles,sundryscrews,amecontrol

mirror, cleaning accessories. This package is sent inside the

woodstoragecompartment(topdoor).

3.6 - INSTALLATION

FIREX 2S is a heat generator which withdraws the combustion air

required for the combustion process directly from the environment

in which it is installed.

For this reason, and above all for the safety of the persons using

FIREX 2S, it must be installed in a ventilated room so that a

continuousowofcombustionairisalwaysassured.

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 minimum free section of 100 cm

, or regardless preventing

pressureintheinstallationareafromexceeding4Pa;

2. Bemadeclosetotheoor;

3. Be appropriately protected by metallic mesh or grate so that

theminimumairpassagecross-sectionisnotreduced;

4. Be positioned in such a way that it cannot be obstructed.



by using openings towards an adjacent room

as long as that room is provided with direct





as regulated by standard UNI 10683.

FIREX 2S 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uegasexhaustsystem(UNI10683).



in front of the boiler no less than the length of the stove itself. You

must at least make sure that the door can open 90° unobstructed.

FIREX 2Scanbeplaceddirectlyontheoorasitisequipped

with a self-supporting frame.

When inspecting compatibility of the heating

system, you should make sure that the support

surface(oor)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oorbemadeofcombustiblematerial

(such as parquet) it should be protected by placing a sheet of

reproofmaterial underneath the FIREX 2S and adequately

wider than the base.

When installation is complete, the boiler must be horizontal 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sucientclearanceforloadingthepellettank.

Do not approach or touch the outer surfaces of the com-



high temperatures following continuous use.

600

1000

1300

600

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Unical FIREX 2S Installation guide

Brand: Unical

Model: FIREX 2S

Type: Installation guide

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Unical FIREX 2S Installation guide

Unical FIREX 2S Installation guide

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