Unical MODULEX EXT Series Technical specifications

ENGLISH
100 - 116 - 150 - 200 - 250 - 300 - 350
MODULEX EXT
INSTALLATION AND MAINTENANCE INSTRUCTIONS

2
https://www.unicalag.it/prodotti/professionale-300/commercial-condensazione-alluminio/347/modulex-ext
Provisions for proper disposal of the product
After decommissioning, this appliance must not be disposed of as mixed urban waste.
Separate waste collection is mandatory for this type of waste, in order to allow the recovery and reuse of the
materials making up the appliance.
Please contact operators authorised for the disposal of this type of appliances
Incorrect management of waste and of its disposal has potential negative e󰀨ects on the environment and human health
The symbol on the appliance, represents the prohibition to dispose of the product as mixed urban waste.

3
Installation instructions Technical Features General information
Maintenance instructions
ENGLISH
4 INSPECTION AND MAINTENANCE................................................................................................................................42
4.1 Inspection and maintenance instructions..................................................................................................................42
4.2 Wiring diagram..........................................................................................................................................................48
3 INSTRUCTIONS FOR THE INSTALLER .........................................................................................................................16
3.1 General warnings......................................................................................................................................................16
3.2 Installation rules ........................................................................................................................................................16
3.3 Preventive system verication and adjustment operations .......................................................................................16
3.4 Package and Weights ..............................................................................................................................................17
3.5 Positioning in boiler room..........................................................................................................................................18
3.6 Flue gas exhaust pipe connection.............................................................................................................................19
3.7 Connection reversibility.............................................................................................................................................20
3.8 Connection................................................................................................................................................................21
3.9 Filling and emptying the system................................................................................................................................23
3.10 Electrical connections ..............................................................................................................................................24
3.11 Commissioning..........................................................................................................................................................33
3.12 Measurement of combustion e󰀩ciency during installation........................................................................................34
3.12.1 Activation of the calibration function...............................................................................................................34
3.12.2 Positioning the sensors..................................................................................................................................34
3.13 Burner pressure adjustment......................................................................................................................................35
3.14 Control panel / emergency operation and safety devices .........................................................................................37
3.15 Programming operating parameters .........................................................................................................................38
3.16 Release and reset error codes..................................................................................................................................40
Attention: this manual contains instructions for the exclusive use of the professionally qualied installer and/or maintenance
technician in compliance with current legislation.
The user is NOT qualied to intervene on 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
2 TECHNICAL SPECIFICATIONS{J}AND DIMENSIONS.................................................................................................10
2.1 Technical features ....................................................................................................................................................10
2.2 Main components view and dimensions ..................................................................................................................10
2.3 Dimensions ..............................................................................................................................................................12
2.4 Operating data .........................................................................................................................................................13
2.4.1 Technical data according to ErP Directive ......................................................................................................14
2.4.2 Determination of the primary circuit pump or boiler pump ..............................................................................15
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 system manager ................................................................................................................................5
1.5 Safety warnings .........................................................................................................................................................6
1.6 Technical data plate ...................................................................................................................................................7
1.7 Water treatment .........................................................................................................................................................8
1.8 Boiler antifreeze protection ........................................................................................................................................9

4
1GENERAL INFORMATION
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 e󰀩ciency and its correct operation,
yearly maintenance must be performed by qualied personnel.
Should you decide not to use the appliance, parts entailing
potential sources of hazard must be made safe.
Before commissioning an appliance that has not been used,
wash the domestic hot water production system, making the
water ow until it has been fully replaced.
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 so that the new owner and/
or installer can refer to it.
Only original accessories must be used for all appliances with
optional features or kits (including electric ones).
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 (*)
(see 1.7 Water Treatment).
1.1 -GENERAL WARNINGS
The instruction manual is an integral and essential part of the
product and must be kept by the user.
Read the warnings contained in this instruction manual carefully
as they provide important guidelines regarding installation, use
and maintenance safety.
Keep the manual 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 qualied and certied personnel.
Systems for the production of domestic hot water MUST be
constructed entirely with compliant materials.
By professionally qualied personnel we mean: personnel with
specic technical skill in the eld of heating system components
for civil use, domestic hot water production and maintenance.
Personnel must have the qualications 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 specic cut-o󰀨 devices.
Do not obstruct the terminals of the intake/exhaust ducts.
In the event of failure and/or malfunctioning of the appliance,
switch it o󰀨 and do not try to repair it or intervene on it directly.
Contact only personnel qualied in compliance with law.
ATTENTION
THE THERMAL UNIT MUST BE INSTALLED IN SUCH A WAY AS TO AVOID, IN
THE ENVISAGED OPERATING CONDITIONS, THE LIQUID IT CONTAINS
FROM FREEZING AND PREVENT COMMAND AND CONTROL PARTS FROM
BEING EXPOSED TO TEMPERATURES BELOW -15°C AND ABOVE +40°C.
THE THERMAL UNIT MUST BE PROTECTED FROM CLIMATIC/
ENVIRONMENTAL VARIATIONS WITH:
- The insulation of hydraulic pipes and condensation drain
- The use of specic antifreeze products in the hydraulic system.

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1.3 - APPROPRIATE USE OF APPLIANCE
The boiler has been constructed according to the current level of engineering and acknowledged technical
safety rules.
Nonetheless, improper use could result in hazards for the safety and life of the user or other persons, i.e.
damage to the appliance or other property.
The appliance is designed to work in heating systems, with hot water circulation, for the production of
domestic hot water.
Any other use shall be considered as misuse.
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. The user must keep this documentation safe for future reference.
• 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.
• Please note that, in compliance with the standards in force, the inspection and maintenance of the appliance must
be carried out in compliance with the regulations and frequency indicated by the manufacturer.
• 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 so that the new owner and/or installer can refer to it.
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 THE SYSTEM MANAGER
1.2 - SYMBOLS USED IN THE MANUAL
When reading this manual, pay special attention to the parts marked by the symbols shown:
NOTE!
For further details refer to the
Technical Information:
at the address indicated
on page 2.
NOTE!
Tips
for the user
OBLIGATION!
wear protective
gloves
ATTENTION!
Possible dangerous
situation for the product
and the environment
DANGER!
Serious danger
to safety
and health
DANGER!
Danger of burns!

6
1.5 - SAFETY WARNINGS
ATTENTION!
The appliance must not be used by children.
The appliance may be used by adults and only after carefully reading the operating
instructions manual for the user / person in charge.
Children must be supervised so they do not play or tamper with the appliance.
ATTENTION! The appliance must be installed, adjusted and maintained by profes-
sionally qualied personnel, in compliance with the standards and provisions in force.
Incorrect installation can cause damage to persons, animals and property for which
the manufacturer cannot be held liable.
DANGER! NEVER attempt performing maintenance or repairs on the boiler on your
own initiative.
Any work must be done by professionally qualied personnel. We recommend stip-
ulating a maintenance contract.
Insufcient or irregular maintenance can jeopardise the operating safety of the appli-
ance and cause damage to persons, animals and property for which the manufacturer
will not be held liable.
ATTENTION! Modifying parts connected to the appliance (upon
completing appliance installation)
Do not modify the following parts:
- the boiler
- the gas, air, water and electricity supply lines
- the ue 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 ttings, use only appropriate xed spanners.
Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas
leakage).
ATTENTION!
Indications for propane gas-red appliances
Make sure that the gas tank has been deaerated before installing the appliance.
For state-of-the-art tank venting, contact the LPG supplier or person qualied in
compliance with the legal requirement.
If the tank has not been professionally deaerated, ignition problems could arise. In
that case, contact the supplier of the LPG tank.
DANGER Gas smell Should a smell of gas be perceived, follow these safety guide-
lines:
- do not turn electrical switches on or off
- do not smoke
- do not use the telephone
- close the gas shut-off valve
- ventilate the area where the gas leakage has occurred
- inform the gas supplier or a company specialised in the installation and mainte-
nance of heating systems.
DANGER! Explosive and easily ammable substances
Do not use or store explosive or easily ammable materials (e.g. petrol, paints, paper)
in the room where the appliance is installed.

7
General information
ENGLISH
1.6 -TECHNICAL DATA PLATE
KEY:
1 = CE monitoring body
2 = Type of boiler
3 = Boiler model
5 = (S.N°) Serial Number
6 = P.I.N. Product Identication Number
7 = Types of approved ue gas exhaust congurations
8 = (NOx) NOx Class
A = Heating circuit characteristics
9 = (Pn) Effective nominal output
10 = (Pcond) Effective output in condensation
11 = (Qn) Maximum thermal ow rate
12 = (Adjusted Qn) Adjusted for rated heat output
13 = (PMS) Max. heating operating pressure
14 = (T max) Max. heating temperature
B = Domestic hot water circuit characteristics
15 = (Qnw) Rated heat output in domestic hot water function
(if different than Qn)
16 = (D) Specific D.H.W. flow rate according to EN625-
EN13203-1
19 = (PMW) Max. domestic hot water operating pressure
20 = (T max) Max. domestic hot water temperature
C = Electrical characteristics
21 = Electrical power supply
22 = Consumption
23 = Protection rating
D = Countries of destination
24 = Direct and indirect countries of destination
25 = Gas category
26 = Supply pressure
E = Factory settings
27 = Adjusted for gas type X
28 = Space for national brands
G = ErP
29 = Seasonal energy efciency to heat the room
30 = Seasonal water heating energy efciency.
The CE Marking
certies the appliance compliance with the essential safety re-
quirements dened in the applicable European Directives and
Regulations and that its operation meets the technical standards
of reference.
The CE marking is a󰀩xed on each individual appliance by a
special label.
The EC declaration of conformity, issued by the Manufacturer
pursuant to international regulations, can be found in the docu-
mentation accompanying the product.
The technical data plate can be found under
the casing, on the front xing crosspiece. ITS
DUPLICATE is placed next to the temperature
control unit.
/
DANGER! Do not use the appliance to support any object.
Specically, do not place any liquid containers (Bottles, Glasses, Containers or
Detergents) on top of the boiler.
If the appliance is installed inside a box, do not insert or place other objects inside it.

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ATTENTION (*) see general warnings 1.1:
The heating only models are NOT suitable
for the production of water for human con-
sumption according to Ministerial Decree
D.M. 174/2004.
ATTENTION!
ANY DAMAGE TO THE BOILER CAUSED BY
THE FORMATION OF SCALING OR BY COR-
ROSIVE WATER WILL NOT BE COVERED BY
THE WARRANTY.
VALUE MIN MAX
PH 6.5 8.5
Hardness [°fr] 9 15
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
1.7 - WATER TREATMENT
Feed water treatment prevents problems and
maintains the functionality and e󰀩ciency of the
generator over time.
The ideal water pH in heating systems must be
within:
To minimise corrosion, it is crucial to use a cor-
rosion inhibitor; in order for it to work properly,
the metal surfaces must be clean.
(see system protection ACCESSORIES sect. in
domestic price list)

9
Technical Features
ENGLISH
1.8 - BOILER ANTIFREEZE
PROTECTION
It is activated by default
This protection can trigger only if the electricity
and gas supplies are connected.
If one of the two is not available and upon reset
11 (SM) a temperature level between 2 and
5°C is detected, the appliance will behave as
described in the table below, pos 2.
The heating system can be protected e󰀨ectively
from frost by using antifreeze products with
inhibitor for heating systems (specic for multi-
metal)
Do not use car engine antifreeze products as
they could damage the water gaskets.
P
O
S
ANTIFREEZE FUNCTION
Supplies 11 - SR (*) Status
antifreeze func-
tion
Actions
Electric Gas
1ON ON < 7 °C ON - Burner and Pump ON until T > 15°C
2
ON OFF
< 5 ÷ 5 °C OFF
FAULT SIGNAL CODE 16
(see par. 4.4 ERROR CODES).
Ignition inhibited.
OFF ON OFF Ignition inhibited.
OFF OFF OFF Ignition inhibited.
(*) SR Sensor par. 2.2

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2TECHNICAL FEATURES AND DIMENSIONS
2.1 - TECHNICAL FEATURES
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
2.2 - INTERNAL VIEW WITH THE INDICATION OF THE MAIN COMPONENTS
KEY
No. C.E. S.E. Description
1 Uy Control panel
2 VG Gas valve
3 Burner cover
4 E. RIL. Ignition electrode
5 E. ACC. Detection electrode
6 SR Local heating sensor
7 TL Limit Thermostat
8 Burner
9Silicon Aluminium Heat Exchanger
10 SL Condensate level sensor
11 Condensate collection pan /
Chimney tting
12 Frame
13 Condensation drainage outlet
14 Drain valve
15 SRR Global Return Sensor

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Technical Features
ENGLISH
ue gas outlet RIGHT side (supply conditions) - LEFT side and REAR side (order rear ue gas outlet kit: MODULEX
EXT 100 - 116 - 150 - 200 - 250 - 300 - 350:
ow RIGHT side (supply conditions) - LEFT side
return RIGHT side (supply conditions) - LEFT side
Gas inlet RIGHT side (supply conditions) - LEFT side
Should it be necessary to position the ue gas exhaust on the left side of the boiler, it is necessary to move cover
“A” with its wiring, level sensor and pressure switch pipe, to the rear side of the boiler.
The rear cover (previously removed) must be repositioned on the right side of the boiler.
Note:
PF (20) and PFmin. (19) are opposi-
te as shown in the photo. For clarity,
in the drawing they are indicated
side by side.
16 SMG Global Flow Sensor
17 Automatic air vent
18 Fan
19 PF min Smoke pressure minimum pressure
switch
20 PF Smoke pressure switch

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2.3 - DIMENSIONS
FRONT VIEW
RIGHT SIDE VIEW
(Supply conditions for right side connections)
TOP VIEW
LEFT SIDE VIEW
(•) Modulex EXT 100 - 200 - 300 Terminal inside casing
MODULEX EXT 100 116 150 200 250 300 350
Dimensions
No. of heating elements 2 3 3 4 5 6 7
Height mm 1150 1150 1150 1150 1150 1150 1150
Width “L” mm 764 764 764 1032 1032 1300 1300
Width “L1” mm 706 706 706 974 974 1242 1242
Depth “P” mm 770 770 770 770 770 770 770
Depth “P1” mm 705 705 705 705 705 705 705
Connection dimensions
Gas Fitting G mm (inch) 50(2 ) 50(2 ) 50(2 ) 50(2 ) 50(2 ) 50(2 ) 50(2 )
System ow M mm (inch) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½)
System return R mm (inch) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½) 64 (2½)
Chimney tting mm 150 150 150 150 200 200 200
Condensation drain mm 40 40 40 40 40 40 40
PRE-CUT
LEFT SIDE
FLOW
PRE-CUT
LEFT SIDE
RETURN
PRE-CUT
LEFT SIDE
GAS

13
Technical Features
ENGLISH
2.4 - OPERATING DATA AND GENERAL FEATURES
For the adjustment data: NOZZLES - PRESSURE - COLLECTORS - FLOW RATES refer to the paragraph ADAPTATION TO
OTHER TYPES OF GAS.
MODULEX EXT 100 EXT 116 EXT 150 EXT 200 EXT 250 EXT 300 EXT 350
Boiler category II2H3P
Modulation ratio 1:8.3 1:9.7 1:12.5 1:16.7 1:20.8 1:25 1:29
Rated heat output on P.C.I. Qn kW 100 116 150 200 250 300 348
Minimum heat output on P.C.I. Qmin kW 12
E󰀨ective nominal output (Tr 60 / Tm 80 °C) Pn kW 97.2 112.9 146.1 195.2 244.5 294 341.7
Minimum e󰀨ective output (Tr 60 / Tm 80 °C) Pn min kW 11.7
E󰀨ective nominal output (Tr 30 / Tm 50 °C) Pcond kW 100.1 116 150 200.4 251.3 302.7 354.6
Minimum e󰀨ective output (Tr 30 / Tm 50 °C) Pcond min kW 12.8
Nominal output performance (Tr 60 / Tm 80°C) % 97.2 97.3 97.4 97.6 97.8 98.0 98.2
Minimum output performance (Tr 60 / Tm 80°C) % 97.16
Nominal output performance (Tr 30 / Tm 50°C) % 100.1 100.0 100.0 100.2 100.5 100.9 101.9
Minimum output performance (Tr 30 / Tm 50°C) % 106.5
Performance at 30% of the load (Tr 30°C) 107.3
Combustion e󰀩ciency at nominal load % 97.8 97.8 97.8 97.8 98.0 98.1 98.3
Combustion e󰀩ciency with reduced load % 98.3 98.3 98.3 98.3 98.3 98.3 98.3
Casing heat loss with burner on (Qmin) % 1.2
Casing heat loss with burner on (Qn) % 0.6 0.5 0.4 0.2 0.2 0.1 0.1
Net ue gas temperature tf-ta (min)(*) °C 33.4
Net ue gas temperature tf-ta (max)(*) °C 44.2 45.1 45.1 46.5 47.3 48.2 49.1
Maximum permitted temperature °C 100
Maximum operating temperature °C 85
Flue gas mass ow rate (min) kg/h 19.6
Flue gas mass ow rate (max) kg/h 163 190 245 327 409 490 569
Excess air % 25.5
Heat loss at chimney with burner on (min) % 1.7
Heat loss at chimney with burner on (max) % 2.2 2.2 2.2 2.2 2.2 1.9 1.7
Minimum heating circuit pressure bar 0.5
Maximum heating circuit pressure bar 6
Water content L 10.1 14.2 14.2 18.3 22.4 26.5 30.6
Methane gas consumption G20 (sup.p. 20 mbar) at Qn m3/h 10.6 12.3 15.9 21.1 26.4 31.7 36.8
Methane gas consumption G20 (sup.p. 20 mbar) at Qmin m3/h 1.3
Gas consumption G25 (sup.p. 20/25 mbar) at Qn m3/h 12.3 14.3 18.4 24.6 36.7 36.9 42.8
Gas consumption G25 (sup.p. 20/25 mbar) at Qmin m3/h 1.5
Propane gas consumption (sup.p. 37/50 mbar) at Qn kg/h 7.8 9.0 11.6 15.5 19.4 23.3 27
Propane gas consumption (sup.p. 37/50 mbar) at Qmin kg/h 0.9
Chimney base maximum pressure available Pa 100
Max condensate production kg/h 15.3 17.7 23 30.6 38.3 45.9 53.6
Emissions
CO at maximum heat output with 0% of O2 (PCI) mg/kWh 57 42 63 62 71 55 63
NOx at maximum heat output with 0% of O2 (PCI) mg/kWh 52 51 61 56 64 62 50
(***) Sound pressure level dB (A) 52 52 52 52 52 52 52
Electrical data
Power supply voltage/frequency V/Hz 230 / 50
(**) Protection rating IP X5D
Room Temperature = 20°C
(*) Temperature detected with appliance operation ow 80°C / ret. 60°C
CO2 (min/max) See ‘’NOZZLES - PRESSURE’’ table
Seasonal Energy E󰀩ciency
according to 2009/125 EEC (<=400Kw) ηs - see ErP table
Leaks upon stop at ∆T 30°C - Pstb - see ErP table
Electricity consumption on standby - Psb - see ErP table
(**) The IP protection rating is obtained with the cover down
(***) at 1 m away in free eld.

14
2.4.1 - TECHNICAL DATA ACCORDING TO ErP DIRECTIVE
MODULEX EXT 100 EXT 116 EXT 150 EXT 200 EXT 250 EXT300 EXT 350
Element Symbol Unit
E󰀨ective nominal output Prated kW 97 113 146 195 244 294 342
Seasonal energy e󰀩ciency of central
heating ƞs% 92
Season e󰀩ciency class for
heating A A A A A A A
For boilers for central heating
and mixed boilers:
e󰀨ective heat output
E󰀨ective heat output with
high temperature capacity
(Tr 60 °C / Tm 80 °C)
P4kW 97.2 112.9 146.1 195.2 244.5 294.0 341.7
Rated heat output e󰀩ciency
with high temperature capacity
(Tr 60 °C / Tm 80 °C)
ƞ4% 88 87.7 87.7 87.7 88.1 88.3 88.5
E󰀨ective output at 30% of the rated heat
output with low temperature
capacity (Tr 30 °C)
P1kW 32.2, 37.4 49.3 64.4 80.5 96.6 112
Performance at 30% of the rated heat
output with low temperature
capacity (Tr 30 °C)
ƞ1% 96.7
Boiler with output range
adjustment: YES / NO NO NO NO NO NO NO NO
Auxiliary electricity consumption
With a full load elmax kW 0.145 0.165 0.210 0.290 0.362 0.435 0.507
With a partial load elmin kW 0.040
Standby mode PSB kW 0.010
Other elements
Heat dispersion on standby Pstb kW 0.787 0.94 0.94 0.98 1.10 1.15 1.39
Nitrogen oxides emissions ref. PCS NOx
Mg/kWh 49
NOx class 6
Annual electricity consumption QHE GJ 306 355 459 612 766 920 1069
For mixed heating appliances
Declared load prole - - - - - - -
Water heating
energy e󰀩ciency ƞwh % - - - - - - -
Daily consumption of electricity Qelec kWh - - - - - - -
Daily consumption of fuel Qfuel kWh - - - - - - -
Internal sound power level Lwa dB (A) - - - - - - -
Annual electricity consumption AEC kWh - - - - - - -
Annual fuel consumption AFC GJ - - - - - - -
Seasonal DHW e󰀩ciency class - - - - - - -

15
Technical Features
ENGLISH
EXAMPLE:
For a ∆T 20K, of a MODULEX 250, the maximum
water ow rate required is 10514 l/h.
The graph of the boiler pressure drops shows that
the pump must ensure a head of at least 1.6 m/H2O
NOTE:
It is always advisable to use a hydraulic separator (*) between
the boiler circuit and the system.
FLOW RATE l/h
Pressure drop (mH2O)
2.4.2 - DETERMINATION OF THE PRIMARY CIRCUIT PUMP OR BOILER PUMP
The pumps must be determined by the installer
or designer according to the boiler and sys-
tem data.
The boiler pump must have head that is able to ensure the
pump's ow rates according to the circuit's ∆t.
MODULEX EXT 100
Maximum ow rate in l/h (∆t=15K) 5,573
Requested rated ow rate in l/h (∆t=20K) 4,180
MODULEX EXT 250
Maximum ow rate in l/h (∆t=15K) 14,018
Requested rated ow rate in l/h (∆t=20K) 10,514
MODULEX EXT 116
Maximum ow rate in l/h (∆t=15K) 6,471
Requested rated ow rate in l/h (∆t=20K) 4,853
MODULEX EXT 300
Maximum ow rate in l/h (∆t=15K) 16,856
Requested rated ow rate in l/h (∆t=20K) 12,642
MODULEX EXT 150
Maximum ow rate in l/h (∆t=15K) 8,376
Requested rated ow rate in l/h (∆t=20K) 6,282
MODULEX EXT 350
Maximum ow rate in l/h (∆t=15K) 19,712
Requested rated ow rate in l/h (∆t=20K) 14,784
MODULEX EXT 200
Maximum ow rate in l/h (∆t=15K) 11,192
Requested rated ow rate in l/h (∆t=20K) 8,394
The pump is not an integral part of the boiler.
It is recommended to select a pump with a ow rate
and head of approximately 2/3 of its characteristic
curve.
(*) For the features, refer to the SPINOX
installation manual, available on the website.

16
3INSTRUCTIONS FOR
INSTALLATION
3.1 - GENERAL WARNINGS
ATTENTION!
This boiler is intended solely for the use it
was expressly designed for. Any other use
is considered improper and therefore dan-
gerous.
This boiler heats water at a temperature
lower than the atmospheric pressure boiling
temperature.
Before connecting the boiler, have professionally
qualied personnel:
a) Thoroughly wash all of the system piping
to remove any residues or impurities
which could jeopardise proper operation
of the boiler, even from a hygiene point of
view.
b) Check that the boiler is set up to operate with
the type of fuel available.
The type of fuel can be seen written on the
package and on the technical feature plate.
c) Check that the chimney/ue has an appro-
priate 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 specic standards and requirements in
force. Only after this check can the tting be
mounted between the boiler and chimney/ue.
ATTENTION!
In rooms with the presence of aggressive
vapours or dust, the appliance must operate
independently from the air inside the instal-
lation room!
ATTENTION!
The appliance must be installed by a qualied
technician with the technical-professional
requirements according to law 46/90 which,
under his own responsibility, guarantees
compliance with standards according to
good practice rules.
ATTENTION!
Mount the appliance respecting the minimum dis-
tances required for installation and maintenance.
The boiler must be connected to a heating system
compatible with its performance and output.
3.2 - STANDARDS FOR
INSTALLATION
It must be installed by a professionally qualied technician, who
shall take the responsibility of observing all local and/or
national laws published in the O󰀩cial Journal, as well as
applicable technical standards.
3.3 - PREVENTIVE SYSTEM VERIFICATION
AND ADJUSTMENT OPERATIONS
Before installing this appliance on old systems, check that:
- The chimney is suitable for appliances with condensation, at
combustion products temperatures, calculated and built in
compliance with the standards in force in this regard.
Is as straight as possible, airtight, insulated, and has no ob-
structions or constrictions.
- The chimney is equipped with a tting to drain condensate.
- The boiler room is equipped with a duct to drain condensate
produced by the boiler.
- The electrical system has been set up by a qualied techni-
cian in compliance with the rules in force.
- The rate, head and direction of the ow of the circulation
pumps are appropriate.
- The fuel adduction line and the tank, if any, are made ac-
cording to relevant standards in force.
- The expansion vessels can fully absorb dilation of the uid in
the system.
- The system has been cleaned from sludge and scaling.

17
Installation instructions
ENGLISH
3.4 - PACKAGING
The boiler is supplied assembled in a sturdy cardboard box.
After removing the two straps, remove the card-
board from the top and ensure the integrity of the
contents.
Keep the packaging material (cardboard box,
straps, plastic bags, etc.) out of the reach of chil-
dren as they are potential sources of danger.
The manufacturer shall not be held liable for
damage to persons, animals or property due to
failure to comply with the instructions above.
- Transport the boiler using suitable transporta-
tion means.
- Protect all parts against impacts if they must be
transported.
- Follow the transport instructions on the pack-
aging.
• The boilers must always be lifted and carried
with a carrying trolley or equipment suitable for
transport.
OBLIGATION!
wear protective gloves
- One box containing:
Gasket between pan and terminal.
Collar gasket
Two elbows + a Tee + a plastic
condensate drain plug
The screws necessary for xing the ue gas terminal
The sensors: external, heater.
The ue inspection cap
Sheet and cable glands for power supply output
On the right side of the boiler:
- Condensate drain trap pipe
- RH and LH side basement
On the back of the boiler:
- Front and rear basement
Above the boiler cover:
- A plastic bag containing:
- Instruction manual for the installation and maintenance
technician
- Uy control unit operating manual
- BCM 2.0 manual
- Hydraulic test certicate
- Certicate of conformity
- Warranty certicate (IT only)
- Warranty extension 10 A (IT only)
- INAIL certicate (IT only)
- Spare parts coupon (IT only)
- Dowels to lock the fan set in raised position (for models
100 ÷ 350 kW)
The box contains
on the front side of the boiler:
-The ue gas exhaust manifold anchored with screws on the
front crosspiece.
- One box containing:
4 support feet
3 closing plugs for possible manifold inversion
3 insulation gaskets for manifolds
(boiler outdoors).
Modulex EXT ABCGross
Weight
mm mm mm kg
100 840 890 1250 203
116 840 890 1250 236
150 840 890 1250 236
200 1110 890 1250 295
250 1110 890 1250 325
300 1375 890 1250 386
350 1375 890 1250 419

18
3.5 -POSITIONING IN THE
BOILER ROOM
Special attention must be paid to the standards and local laws
with regard to boiler rooms, especially the minimum distances
that must be kept free around the boiler.
Installation must comply with the provisions in the most recent
standards and laws in force with regard to boiler rooms, instal-
lation of heating systems and domestic hot water production,
ventilation, suitable chimneys to drain combustion products from
condensate boilers and anything else applicable.
The boiler can be placed on a at and su󰀩ciently sturdy base,
with a size, in the plan, not inferior to that of the boiler and at
least 100 mm high (see gure) in order to be able to mount the
siphon for condensate draining. As an alternative to this base,
a sump can be obtained on the oor, next to the boiler, with a
100 mm depth for housing the siphon (see gure).
When installation has been performed, the boiler must be per-
fectly horizontal and stable (to reduce any vibrations and noise).
Comply with the minimum clearance distances
in order to execute normal maintenance and
cleaning operations.
SIPHON

19
Installation instructions
ENGLISH
3.6 - FLUE GAS EXHAUST PIPE CONNECTION
To connect the ue gas exhaust pipe, local and national stand-
ards must be observed
ATTENTION:
The chimney must comply with the standards
in force.
HEAD AVAILABLE AT THE BASE OF THE CHIMNEY
D (Drain) + I (Intake)
∆p = 100 Pa
The maximum permitted length of the pipes is determined
by the head (∆p) available at the base of the chimney.
HEAD AVAILABLE AT THE BASE OF THE CHIMNEY
D (Drain) I (Intake)
∆p = 100 Pa -
The maximum permitted length of the pipes is determined
by the head (∆p) available at the base of the chimney.
B23P ATTENTION
For this type of connection, the room follows the
same installation rules for boilers with natural
draught.
Connection to a combustion products evacuation pipe outside
the room; the combustion air is taken directly from the room
where the appliance is installed.
C63 ATTENTION
For the C63 conguration, you must order
the optional air intake kit, which contains the
installation instructions.
Separate combustion air intake and combustion products
evacuation pipes. (Commercial accessories)
ATTENTION:
for B23P types of connection, the room follows
the same installation rules for natural draught
boilers.
3.6.1- MANIFOLD CONNECTION
EXHAUST PIPE
Use the nuts and washers contained in the bag to
x the ue gas exhaust manifold.
The ue gas inlet must be positioned on the rst
straight section within 1 metre from the boiler.
To create the ue gas inspection inlet, make one
Ø 21 mm hole in the ue gas outlet pipe and t the
inspection inlet following the indicated sequence.
The boiler is type approved for the exhaust congurations listed
below:

20
3.7 - CONNECTION REVERSIBILITY
FLOW and RETURN reversibility
To move the ue gas exhaust to the LEFT, invert the two
sides of the casing.
To move the gas connection to the
opposite side, invert the blind ange
with the anged nozzle.
GAS Reversibility
FOR MODELS 250 - 300 - 350
To move the flue gas exhaust from the RIGHT
(standard supply position) to the back, it is necessary
to request the optional ue gas kit consisting of the
Tee shown in the gure and a closing plate of the
Rh side hole of the casing.
FOR MODELS 100 - 116 - 150 - 200
It is necessary to request the optional ue gas kit
consisting of the closing plate of the Rh side hole
of the casing.
The boiler leaves the factory ready for hydraulic, gas and ue
gas outlet connections (ow and return) on the RIGHT side of
the boiler.
To move the Flow / Return connections to the opposite side,
invert the blind ange with the
anged nozzle.
To move the hydraulic connec-
tions (only one or both) to the
LEFT side, it is necessary to
remove the precut part, near
the connections to be moved
to the opposite side and close
the RIGHT side of the casing
using the caps supplied with
the boiler.
FLUE GAS Reversibility