Unical MODULEX EXT 440, MODULEX EXT 348, MODULEX EXT 770, MODULEX EXT 900, MODULEX EXT 550 Installation And Maintenance Instructions Manual

ENGLISH

MODULEX EXT

348 - 440 - 550 - 660 - 770 - 900

INSTALLATION AND MAINTENANCE INSTRUCTIONS

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.

2

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

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

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

ENGLISH

General information

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

3.4.1 Unloading operations .......................................................................................................................................18

3.5 Positioning in boiler room ..........................................................................................................................................19

3.6 Flue gas exhaust pipe connection.............................................................................................................................20

3.7 Boiler connection.......................................................................................................................................................21

3.8 Connection ................................................................................................................................................................22

3.9 Filling and emptying the system ................................................................................................................................24

3.10 Electrical connections ..............................................................................................................................................26

3.11 Commissioning..........................................................................................................................................................35

3.12 Measurement of combustion e󰀩ciency during installation ........................................................................................37

3.12.1 Activation of the calibration function ...............................................................................................................37

3.12.2 Positioning the sensors ..................................................................................................................................37

3.13 Checking burner pressure adjustment ......................................................................................................................38

3.14 Control panel, emergency operation and safety devices ..........................................................................................39

3.15 Programming operating parameters .........................................................................................................................40

3.16 Release and reset error codes ..................................................................................................................................43

4 INSPECTION AND MAINTENANCE ................................................................................................................................ 43

4.1 Inspection and maintenance instructions .................................................................................................................. 43

4.2 Wiring diagram ..........................................................................................................................................................50

Technical Features

Installation instructions

Maintenance instructions

3

1

GENERAL INFORMATION

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.

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 appli­ance 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 dan­gerous (*)
(see 1.7 Water Treatment).

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

THE THERMAL UNIT MUST BE PROTECTED FROM CLIMATIC/ENVIRONMEN-

TAL VARIATIONS WITH:

+40°C.

- The insulation of hydraulic pipes and condensation drain

- The use of specic antifreeze products in the hydraulic system.

4

1.2 - SYMBOLS USED IN THE MANUAL

When reading this manual, pay special attention to the parts marked by the symbols shown:

DANGER!

Serious danger

to safety

and health

DANGER!

Danger of burns!

ATTENTION!

Possible dangerous

situation for the product

and the environment

OBLIGATION!

wear protective

gloves

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.

NOTE!

Tips

for the user

NOTE!

For further details

refer to the Technical Informa-

tion:

at the address indicated

on page 2.

1.4 - INFORMATION FOR THE SYSTEM MANAGER

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.

5

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 stip­ulating a maintenance contract.
Insufcient or irregular maintenance can jeopardise the operating safety of the appli­ance 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 guide­lines:

- 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 mainte­nance 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.

6

/

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.

1.6 - TECHNICAL DATA PLATE

ENGLISH

The CE Marking

certies the appliance compliance with the essential safety re­quirements 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 docu­mentation 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.

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

General information

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.

7

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:

VALUE MIN MAX

PH 6.5 8

Hardness [°fr] 9 15

To minimise corrosion, it is crucial to use a cor­rosion inhibitor; in order for it to work properly,
the metal surfaces must be clean.
(see system protection ACCESSORIES sect. in
domestic price list)

ATTENTION!
ANY DAMAGE TO THE BOILER CAUSED BY
THE FORMATION OF SCALING OR BY COR­ROSIVE WATER WILL NOT BE COVERED BY
THE WARRANTY.

ATTENTION (*) see general warnings 1.1:
The heating only models are NOT suitable
for the production of water for human con­sumption according to Ministerial Decree
D.M. 174/2004.

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

8

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.

ENGLISH

P
O
S

1 ON ON < 7 °C ON - Burner and Pump ON until T > 15°C

2

(*) SR Sensor par. 2.2

Supplies 11 - SR (*) Status

Electric Gas

ON OFF

< 5 ÷ 5 °C OFF

OFF ON OFF Ignition inhibited.

OFF OFF OFF Ignition inhibited.

ANTIFREEZE FUNCTION

Actions

antifreeze func-

tion

FAULT SIGNAL CODE 16
(see par. 4.4 ERROR CODES).
Ignition inhibited.

Technical Features

9

TECHNICAL FEATURES AND DIMENSIONS

2

NOTE!

2.1 - TECHNICAL FEATURES

2.2 - INTERNAL VIEW WITH THE INDICATION OF THE MAIN COMPONENTS

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

10

ENGLISH

Technical Features

KEY

No. C.E. S.E. Description

1 Uy Control panel

2 VG Gas valve

3 Burner cover

4 E. ACC. Ignition electrode

5 E. RIL. Detection electrode

7 TL Limit Thermostat

8 Burner

9 Silicon Aluminium Heat Exchanger

10 SL Condensate level sensor

11

12 Frame

Flue gas outlet LEFT, RIGHT, REAR side
Flow LEFT side
Return LEFT side
Gas inlet LEFT side

Condensate collection pan /

Chimney tting

13 Condensation drainage outlet

14 Drain valve

15 SRR Global Return Sensor

16 SMG Global Flow Sensor

17 Automatic air vent

18 Fan

19 PF min

20 PF Smoke pressure switch

Smoke pressure minimum pressure
switch

BCM: under the front casing

11

2.3 - DIMENSIONS

395

946

235

S

1267

534

327

R

M

G

122

L1

287

L

62,5

24

S

=

=

1448

FRONT VIEW

LEFT SIDE VIEW

RIGHT SIDE VIEW

TOP VIEW

Flue Gas Outlets:
Left side (supply conditions)

Right side
Rear side

MODULEX EXT 348 440 550 600 770 900
Dimensions

No. of heating elements 4 4 5 6 7 8
Height mm 1448 1448 1448 1448 1448 1448
Width “L” mm 1087 1087 1355 1355 1623 1623
Width “L1” mm 1039 1039 1307 1307 1575 1575

Depth mm 946 946 946 946 946 946

Connection dimensions

Gas Fitting G mm (inch) 80 (3) 80 (3) 80 (3) 80 (3) 80 (3) 80 (3)
System ow M mm (inch) 100 (4) 100 (4) 100 (4) 100 (4) 100 (4) 100 (4)
System return R mm (inch) 100 (4) 100 (4) 100 (4) 100 (4) 100 (4) 100 (4)
Chimney tting mm 250 250 250 300 300 300
Condensation drain mm 40 40 40 40 40 40

12

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 348 EXT 440 EXT 550 EXT 660 EXT 770 EXT 900
Boiler category II

2H3P

II

2H3P

II

2H3P

II

2H3P

II

2H3P

Modulation ratio 1:15.8 1:19.6 1:24.5 1:29.4 1:34.3 1:39.2
Rated heat output on P.C.I. Qn kW 348 432 540 648 756 864
Minimum heat output on P.C.I. Qmin kW 22

E󰀨ective nominal output (Tr 60 / Tm 80 °C) Pn kW 341.7 424.3 530.4 636.5 742.6 849.0
Minimum e󰀨ective output (Tr 60 / Tm 80 °C) Pn min kW 20.6
E󰀨ective nominal output (Tr 30 / Tm 50 °C) Pcond kW 359.2 445.0 557.8 670.1 783.2 900.3
Minimum e󰀨ective output (Tr 30 / Tm 50 °C) Pcond min kW 23.9

Nominal output performance (Tr 60 / Tm 80°C) % 98.2
Minimum output performance (Tr 60 / Tm 80°C) % 93.5
Nominal output performance (Tr 30 / Tm 50°C) % 104
Minimum output performance (Tr 30 / Tm 50°C) % 109
Performance at 30% of the load (Tr 30°C) 106.8 107.3 107.5 108.3 107.8 107.6

Combustion e󰀩ciency at nominal load % 97.8
Combustion e󰀩ciency with reduced load % 98.5

Casing heat loss with burner on (Qmin) % 5.04
Casing heat loss with burner on (Qn) % 0.1

Net ue gas temperature tf-ta (min)(*) °C 31
Net ue gas temperature tf-ta (max)(*) °C 46.0 46.7 46.7 46.7 46.7 45.8

Maximum permitted temperature °C 100
Maximum operating temperature °C 85

Flue gas mass ow rate (min) kg/h 25
Flue gas mass ow rate (max) kg/h 558 693 866 1040 1213 1386

Excess air % 24.25
Heat loss at chimney with burner on (min) % 1.5
Heat loss at chimney with burner on (max) % 2.40 2.58 2.53 2.51 2.58 2.58
Minimum heating circuit pressure bar 0.5
Maximum heating circuit pressure bar 6
Water content L 67 67 80 94 108 122

3

Methane gas consumption G20 (sup.p. 20 mbar) at Qn m
Methane gas consumption G20 (sup.p. 20 mbar) at Qmin
Gas consumption G25 (sup.p. 20/25 mbar) at Qn m
Gas consumption G25 (sup.p. 20/25 mbar) at Qmin m

/h 36.80 45.68 57.10 68.52 79.94 91.36

m3/h 2.33

3

/h 42.80 53.13 66.41 79.69 92.97 106.25

3

/h 2.71
Propane gas consumption (sup.p. 37/50 mbar) at Qn kg/h 27.01 33.53 41.92 50.30 58.68 67.01
Propane gas consumption (sup.p. 37/50 mbar) at Qmin kg/h 1.71
Chimney base maximum pressure available Pa 100
Max condensate production kg/h 59.1 73.4 91.7 11 0 128.4 146.7

Emissions

CO at maximum heat output with 0% of O2 (PCI) mg/kWh 55 72 76 87 72 76
NOx at maximum heat output with 0% of O2 (PCI) mg/kWh 56 52 52 58 55 57
(***) Sound pressure level dB (A) 54 54 54 54 54 56

ENGLISH

Technical Features

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

(min/max) See ‘’NOZZLES - PRESSURE’’ table

CO

2

Seasonal Energy E󰀩ciency

Leaks upon stop at ∆T 30°C - Pstb - see
Electricity consumption on standby - Psb - see

according to 2009/125 EEC (<=400Kw)

ErP table

ErP table

ηs - see ErP table

(***) at 1 m away in free eld.

(**) The IP protection rating is obtained with the cover down

13

2.4.1 - TECHNICAL DATA ACCORDING TO ErP DIRECTIVE

MODULEX

EXT 348 EXT 440 EXT 550 EXT 660 EXT770 EXT 900

Element Symbol Unit

E󰀨ective nominal output Prated kW 342 424 530 636 743 849
Seasonal energy e󰀩ciency of

central heating

Season e󰀩ciency class for

heating

ƞ

s % 93

A * * * * *

For boilers for central heating

and mixed boilers:
e󰀨ective heat output

E󰀨ective heat output with

high temperature capacity

P

4 kW 341.7 - - - - -

(Tr 60 °C / Tm 80 °C)

Rated heat output e󰀩ciency

with high temperature capacity

4 % 88.5 - - - - -

ƞ

(Tr 60 °C / Tm 80 °C)

E󰀨ective output at 30% of the rated heat

output with low temperature

1 kW 11.5 - - - - -

P

capacity (Tr 30 °C)

Performance at 30% of the rated heat
output with low temperature

ƞ

1 % 96.2 - - - - -

capacity (Tr 30 °C)

Boiler with output range adjustment: YES / NO NO NO NO NO NO NO

Auxiliary electricity consumption

With a full load elmax kW 0.393 0.626 0.783 0.940 1.096 1.252

With a partial load elmin kW 0.054
Standby mode P

SB kW 0.020

Other elements

Heat dispersion on standby P
Nitrogen oxides emissions ref. PCS NOx

stb kW 0.2114 0.2114 0.2114 0.2114 0.2114 0.2114

Mg/kWh

49
NOx class 6
Annual electricity consumption Q

HE GJ 1050 1303 1633 1959 2286 2612

For mixed heating appliances

Declared load prole - - - - - - -

Water heating

energy e󰀩ciency

wh % - - - - - - -

ƞ

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

14

- - - - - - -

2.4.2 - DETERMINATION OF THE PRIMARY CIRCUIT PUMP OR BOILER PUMP

The boiler pump must have head that is able to ensure the
pump's ow rates according to the circuit's ∆t.

The pumps must be determined by the installer
or designer according to the boiler and sys­tem data.

MODULEX EXT 440

Maximum ow rate in l/h (∆t=15K) 24,326

Requested rated ow rate in l/h (∆t=20K) 18,243

MODULEX EXT 550

Maximum ow rate in l/h (∆t=15K) 30,404

Requested rated ow rate in l/h (∆t=20K) 22,804

MODULEX EXT 660

Maximum ow rate in l/h (∆t=15K) 36,487

Requested rated ow rate in l/h (∆t=20K) 27,365

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.

ENGLISH

MODULEX EXT 770

Maximum ow rate in l/h (∆t=15K) 42,570

Requested rated ow rate in l/h (∆t=20K) 31,926

MODULEX EXT 900

Maximum ow rate in l/h (∆t=15K) 48,647

Requested rated ow rate in l/h (∆t=20K) 36,487

O)

2

Pressure drop (mH

FLOW RATE l/h

EXAMPLE:

For a ∆T 20K, of a MODULEX 900, the maximum
water ow rate required is 36,289 l/h.

The graph of the boiler pressure drops shows that
the pump must ensure a head of at least 1.6 m/H2O

Technical Features

NOTE:

It is always advisable to use a hydraulic separator (*) between
the boiler circuit and the system.

(*) For the features, refer to the SPINOX
installation manual, available on the website.

15

3

INSTRUCTIONS 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 dan­gerous.
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 implement­ed 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 instal­lation 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 dis­tances 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
obstructions 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 techni­cian 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 ac­cording 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.

16

3.4 - PACKAGING

The boiler MODULEX is supplied assembled in a sturdy card­board box.

After removing the two straps, remove the card­board 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.
Unical will not be held liable for damage to per-

sons, animals or objects due to failure to comply

with the above instruction.

OBLIGATION!
wear protective gloves

- Transport the boiler using suitable transportation means.

- Protect all parts against impacts if they must be transported.

- Follow the transport instructions on the packaging.

• The boilers must always be lifted and carried with a carrying

trolley or equipment suitable for transport.

To remove the boiler from the pallet, it is necessary to have a
rocker crane, to avoid damage during gripping.

- Remove the casings and harness with the straps “A”, taking
care to pass the straps on the load-bearing crosspieces of
the frame

- Tie the straps to the rocker arm “B”, operating with caution.

the box contains:

Modulex EXT A B C

mm mm mm kg
348 1263 1120 1515 585
440 1263 1120 1515 585
550 1531 1120 1515 643
660 1531 1120 1515 707
770 1799 1120 1515 806
900 1799 1120 1515 858

on the left side of the boiler:

- The ue gas exhaust manifold

- A cardboard box containing:

Gasket between pan and terminal.
Collar gasket (Ø 250) Ø 300.
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

- A cardboard box containing:

The anges

Inside the rear side casing:

- The condensate drain trap pipes (1 m)

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 (use only
for models 100 ÷ 350 kW)

Gross
Weight

ENGLISH

Installation instructions

17

3.4.1 - UNLOADING AND REMOVING THE PACKAGING

1

Max. admitted boilers
stacked

Do not turn upside down Do not expose to rain Fragile Do not expose to sunlight Do not store at

temperature:
lower than - 5 ° C / 23 °F
superior than 50 °C / 122 °F

T max
50°C/122°F

T min

-5°C/23°F

2

Max. admitted boilers
stacked

Do not turn upside down Do not expose to rain Fragile Do not expose to sunlight Do not store at

temperature:
lower than - 5 ° C / 23 °F
superior than 50 °C / 122 °F

T max
50°C/122°F

T min

-5°C/23°F

3

Max. admitted boilers
stacked

Do not turn upside down Do not expose to rain Fragile Do not expose to sunlight Do not store at

temperature:
lower than - 5 ° C / 23 °F
superior than 50 °C / 122 °F

T max
50°C/122°F

T min

-5°C/23°F

4

ATTENTION!
Handling with forklift or strap hoist,

ATTENTION!
Strap passage points for lifting. The straps must
be mounted on the load-bearing crosspieces.

18

3.5 - POSITIONING IN THE BOILER ROOM

A> 400 mm
B > 400 mm
C = 100 mm
D= 500 mm

Szifon

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, instal­lation 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 per­fectly horizontal and stable (to reduce any vibrations and noise).

Comply with the minimum clearance distances in
order to execute normal maintenance and cleaning
operations.

ENGLISH

C

A

B

D

Installation instructions

SIPHON

19

3.6 - FLUE GAS EXHAUST PIPE CONNECTION

To connect the ue gas exhaust pipe, local and national stand­ards must be observed

The boiler is type approved for the exhaust congurations listed

below:

B23P

Connection to a combustion products evacuation pipe outside
the room; the combustion air is taken directly from the room
where the appliance is installed.

HEAD AVAILABLE AT THE BASE OF THE CHIMNEY

The maximum permitted length of the pipes is determined
by the head (∆p) available at the base of the chimney.

ATTENTION
For this type of connection, the room follows the
same installation rules for boilers with natural
draught.

D (Drain) I (Intake)

∆p = 100 Pa

-

C63

Separate combustion air intake and combustion products
evacuation pipes. (Commercial accessories)

HEAD AVAILABLE AT THE BASE OF THE CHIMNEY

The maximum permitted length of the pipes is determined
by head (∆p) available at the base of the chimney.

ATTENTION
For the C63 conguration, you must order
the optional air intake kit, which contains the
installation instructions.

D (Drain) + I (Intake)

∆p = 100 Pa

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.

ATTENTION:
The chimney must comply
with the standards in force.

20

3.7 - BOILER CONNECTION

F

F

G

F

RM

The MODULEX boiler leaves the factory ready for hydraulic

(ow and return), gas connections on the left side of the boiler.
To x the ue gas exhaust manifold, use the screws and gaskets

contained in the accessory kit box and a 10 mm socket wrench.

The ue gas manifold is set-up on the LEFT SIDE, the outlet can

also be set-up on the RIGHT and REAR SIDE.

ENGLISH

Collector mounted on the rst and last element of the ow
manifold Ø 18 (A), inside Ø 27 (B)
Gaskets mounted on all other elements (C).

Collectors and Gaskets

A

B

A

Installation instructions

C

21

3.8 - CONNECTION

G GAS G 3’’

Danger!
The gas must be connected only by a qual-

ied installer who must respect and apply

the requirements set forth by relevant laws
in force and by the local prescriptions of
the supply company. Incorrect installation
can cause harm to persons and animals and
damage property for which the manufacturer

shall not be held liable.

If you smell gas:

a) Do not operate electrical switches,

the telephone or any other object that

may cause sparks;

b) Immediately open doors and
windows to create air current
to air out the room;

c) Close the gas valves.

d) Request the intervention of professionally

qualied personnel.

M FLOW G 4’’

R RETURN G 4’’

Make sure that the system pipes are not used as
earthing electrodes of the electric or telephone
system. They are absolutely not suitable for this
type of use. Serious damage could result for the
piping, boiler and radiators in a short amount
of time.

ATTENTION!

IT IS STRICTLY FORBIDDEN TO FIT SHUT­OFF DEVICES ON THE GENERATOR BEFORE
THE SAFETY DEVICES.

As a precaution against gas leaks, we recom­mend installing a monitoring and protection
system consisting of a gas leak detector

coupled with a shut-o󰀨 solenoid valve on the

gas feed line.

22

Condensation drain

H min 100 mm

150

C

B

150**

25*

A

The boiler, during the combustion process, produces conden-

sation that, through pipe “A”, ows into the trap.
The condensation that forms inside the boiler ows

into a suit-

able drain via pipe “B”.

Danger!
Before commissioning the appliance:

- check that the siphon is assembled correctly

- ll the siphon through the ller cap C and

check correct drainage of the condensate

If the appliance is used with an empty conden-

sation drain trap, there is an intoxication hazard
due to the release of exhaust gases.

FRONT SIDE

The outlet of the condensate drainage pipe is towards the con-

nection side of the ue gas box manifold, removing the pre-cut

part on the covering panel.

The upper generator

of the drain pipe

must not be higher than

the bottom of the pan.

ENGLISH

BOILER ROOM
FLOOR

* Minimum safety siphon set by the standard

** Minimum head with boiler running at maximum power.

The connection between the appliance and the
domestic wastewater system must be made in

compliance with the specic reference standards.

AT
BLOW DOWN
DRAINAGE

If you do not want to or cannot create a base,
the boiler can be mounted at ground level and
a sump at least 100 mm deep can be made to

house the siphon

NOTE!

For further details

refer to the Technical Information

from the website

Installation instructions

23

3.9 - FILLING AND EMPTYING

THE SYSTEM

When all system connections have been com-

pleted, the circuit can be lled.

To ll the system, you must provide a lling

valve on the system's return.

EXAMPLE OF THE SYSTEM'S LOADING UNIT

UNIT OF
LOADING

To ll the system, you must provide a lling valve on

the heating circuit, or use the optional accessories.

The boiler is equipped with its own drain valve, 14
This valve can never be used to drain the system
since all the dirt in the system can accumulate

in the boiler and jeopardise its proper operation.

Therefore, before using the drain valve, make sure

the system's check valve, which is situated under

the pump, has been closed.

The system must be equipped with its own
drain valve, which is to be suitably sized ac­cording the system's capacity.

24

ENGLISH

PAGE LEFT INTENTIONALLY BLANK

Installation instructions

25

3.10 - ELECTRICAL CONNECTIONS

F1

AE

G

H

F

I

18:28

giov 30 20ott 18

effettiva

richiesta

76°C84

°C

generatore

10/10

modulazione

100

%

INFO MENU

status

sanitaria

25

°C

678910 11 12 FL TA

INAIL

Y2- BCM

12345

1

Y3- BCM

Y2-HSCP/UFLY

56

843

Y1-BMM1

4321

Y4- BCM

23

B

1
2
3
4
5
6
7

A2

A1

A4

A3

Y2

Y1

Y3

GND

A5

1
2

1
2
3

M1

M2

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

123

4
56

789101112

123

4
5678

Y1

1
2

34

A2

1
2

34

A3

A1

123

456

ROD1 ROD

F1

A4

51

50

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

123

4
56

789101112

123

4
5678

Y1

1

2

34

A2

1
2

34

A3

A1

123

456

ROD1 ROD

F1

A4

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

123

4
56

789101112

123

4
5678

Y1

1
2

34

A2

1
2

34

A3

A1

123

456

ROD1 ROD

F1

A4

D

NPE

L1

NPE

L1

F1

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

123

4
56

789101112

123

4
5678

Y1

1
2

34

A2

1
2

34

A3

A1

123

456

ROD1 ROD

F1

A4

52

53

00330914

ATTENZIONE!

ATTENTION!

ACHTUNG!
ATENCIÓN!

ATTENTIE!

UPOZORNÌNÍ!

230 V

！

Danger!

Before performing connections or any type of
operation on electrical parts, always disconnect
the electrical power and make sure that it cannot
be reconnected accidentally.

KEY

No. Description

A BCM Boiler controller

B Services connection return terminal board

D Wieland mobile pow. supp. socket 230 V -

50Hz

E Uy P heating controller

F LTGL TLG triggering lamp

G F1 Power supply fuse 6.3 AT 250V

H Boiler Main switch

I LTGL Manual reset main limit thermostat

50 BMM Burner management board

51 Power supply board

52 F1 Power supply fuse 6.3AF 250V

53 F1 BMM Board Fuse 6.3AF 250V

26

Danger!

Only a qualied technician may perform the

electrical installation.

Electrical connection to the main power sup­ply.

This connection must be made up to standard, as
required by regulations in force.

Electric power supply connection

Remember that a bipolar switch must be installed
on the boiler power line with over 3 mm between
contacts, easy to access, making maintenance
quick and safe.

The power supply of the boiler, single-phase 230
V - 50 Hz, must be made with H05VV-F type
three-pole cable
(PHASE - NEUTRAL - EARTH)
with 0.75 mm section up to 1.5 mm.

ATTENTION!

Respect the PHASE and NEUTRAL polarity

since ame detection is Phase Sensitive.

ATTENTION:

The 230 V cables must run far apart from 24V
cables.

ENGLISH

- Make the power supply connection on the “D” plug, sup-

plied with the boiler.

N.B. 24 V - 230 V output - Keep the 2 voltages separate

Installation instructions

27

NOTE:

P.

Coll.

P.

CH

P. Car.

DHW

1

2

3

Y5

0

1

2

3

4

5

6

7

8

9

2

3

4

Y3

1

5

4

3

2

1

Y1

J1P

Modbus

INAIL

SAFE

INPUT 0-10V

1

Y3 -BCM

Y2 -HSCP/UFLY

56

843

Y1 -BMM1

4321

Y4 -BCM

23

INAIL

Modbus

BCM

Ufly

The boiler is set up for direct ow and storage tank

management.
If Stemp. ACC is connected automatically, DHW is
activated, which will have priority management with
regard to direct ow through the pumps shown be­low.

Should additional services be requested (storage tanks, mixed
areas, solar, etc), you must purchase SHC multifunction kits for
full control through the Uy P heating control.

At the

corresponding
terminal boards
of the boards in

the

boiler

Alarm
signal

12345

(-) GND

(+) 0-10V

678910 11 12 FL TA

Y2 -BCM

28

Alim.
230V

C.P. M.

P.

Mod.

SE

+

Stemp.

ACC

FL

TA

Connections for:

1

2

3

Y5

0

1

2

3

4

5

6

7

8

9

2

3

4

Y3

1

2

3

4

1

5

6

7

Y4

5

4

3

2

1

765

8

4

3

2

Y2

Y1

1

J1P

SHC

Modbus

Ufly

Y2 BCM

Modbus BCM
A
B

1
2

Remote boiler control
A (1) Data connection
B (2) Data connection

P. mod 4 - 5 Modulating heating pump

SE 6 - 7 External sensor

- / + 6 - 7 0 / 10 V signal contact

Stemp ACC
( * )

6 - 8 Storage Tank Temperature

Sensor

FL FL - 10 Flow switch (remove jumper)

INAIL 11-12 Safety devices

(remove jumper)

TA TA - 9 Room thermostat / Clock

remove jumper

Y4 - BCM

Alarm signal

(**)

3 - 4 Alarm / signal contact

(NO potential-free contact)

P. Coll. 1 - 2 Manifold pump (primary loop)

Y3 - BCM

P. CH 1 - 3 Heating circuit pump

P. Car DHW 1 - 2 Storage Tank loading Pump

UFLY

Y2 -

Modbus Uy

A

B

5
6

Remote Temperature
A (5) Data connection
B (6) Data connection

Control

Y1 BMM1

SHC
(***)

8 - 4 - 3 Optional multifunction module

(to be inserted in the box cover)

ENGLISH

( * )
If the storage tank temperature sensor is connected, DHW ser­vice is automatically activated on boiler power supply.
Parameter (803) Srv (is automatically updated).

( ** )
Relay contact that closes when in alarm mode

( *** )
SHC optional
The system can power only one SHC module.
If you need to have more than one SHC module, they must be
placed externally in a dedicated electrical panel and
powered with their own power supply unit.

Installation instructions

The BCM and SHC relay contacts support
pumps with max. 4A absorption.

Modbus BCM
can be used for control from building automation,
can also be connected

with Modbus Uy to have a single bus.

29

PAGE LEFT INTENTIONALLY BLANK

30

Connection diagram example:

1

NPEL1

L

N

SS

M

Ext. MinDPIn

0-10V

P.

mod.

FL

1

C C CNC NC NO

1.3 (T.S.)

1.2 (P. min.)1.1 (P. max.)

SAFE

678910 11 12 FL TA

INAIL

Y2-BCM

12345

1

Y3-BCM

Y2-HSCP/UFLY

56

843

Y1-BMM1

4321

Y4-BCM

23

SE

Menu

B

Power supply, INAIL, Modulating pump, External sensor, Flow switch

230 V - 50 Hz

N

PE

L1

ENGLISH

PE

L1

2

D

N

KEY

No. Description

1 INAIL - Safety bodies

2 Main electrical panel (not supplied)

B Services connection return terminal board

D Wieland mobile pow. supp. socket 230 V -

50Hz

FL Terminals for Flow switch

SE Terminals for external Sensor

SMG Global ow sensor

P on_o󰀨 Manifold Pump Connections (on_o󰀨)

P mod Modulating pump Connections

Installation instructions

31

Connection diagram example: 2 modulex in pack managed by cascade manager

CH

P.

CH

Y4

1

2

3

4

1

2

3

123

4

5

6

Y3

Y2

1211 10 98765

4321

0

1

2

3

4

5

6

7

8

9

981011121314

2134567

Jp2

SE

24 V -DC

CM 140 - cascade manager

24 V -DC

BR

BK

R

S

M

G

FL

D

230 V - 50 Hz

L1

PE

N

2

L1

PE

N

1

C C CNC NC NO

1.3 (T.S.)

1.2 (P. min.)1.1 (P. max.)

SAFE

1

NPEL1

Menu

L

N

SS

M

Ext. MinDPIn

0-10V

P.

mod.

D

230 V - 50 Hz

L1

PE

N

2

L1

PE

N

1

NPEL1

Menu

+ 24 V

(-)

eBUS +

1

2

3

4

1

2

3

4

5

6

7

Menu

678910 11 12 FL TA

INAIL

Y2-BCM

12345

1

Y3-BCM

Y2-HSCP/UFLY

56

843

Y1-BMM1

4321

Y4-BCM

23

eBUS -

eBUS +

FL

1

C C CNC NC NO

1.3 (T.S.)

1.2 (P. min.)1.1 (P. max.)

SAFE

L

N

SS

M

Ext. MinDPIn

0-10V

P.

mod.

678910 11 12 FL TA

INAIL

Y2-BCM

12345

1

Y3-BCM

Y2-HSCP/UFLY

56

843

Y1-BMM1

4321

Y4-BCM

23

eBUS -

eBUS +

B

B

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

primary loop

(*) Note:

For the cascade connection,
position the selector on the BCM
in the indicated position.

(*)

(*)

(*) Note:

For the cascade connection,
position the selector on the BCM
in the indicated position.

32

CH

C

P.

CH

P. Car.

DHW

Stemp.

ACC

Y4

1

2

3

4

1

2

3

123

4

5

6

Y3

Y2

12 11 10 98765

4321

0

1

2

3

4

5

6

7

8

9

981011121314

2134567

Jp2

L

with direct zone and DHW production.

secondary loop

ENGLISH

Note:
To congure cascade boiler management param­eters, refer to the specic installation manual.

Note:

Installation instructions

In case of installation with single boiler, the above
connections must be made on the return
terminal board (BCM board) inside the boiler.

Note:

Illustrative diagram, consider the total nominal

ow rate, any check valves (not supplied), and
verify the e󰀩ciency of the ow switches at each
ow rate in modulation.

33

Wilo Stratos modulating pump setting (ext. input enabling 0 - 10 V)

ON

ON

OFF

10V

ON

10V

34

3.11 - COMMISSIONING

Commissioning must be done by professionally

qualied personnel. Unical will not be held liable
for damage to persons, animals or objects, due to

failure to comply with the aforesaid instructions.

does the installation meet the specic standards and regulations in force, both relating to the

gas part as well as the electrical part?

do the combustion air intake and ue gas exhaust take place properly according to
what is dened by the specic rules and regulations in force?

is the fuel supply system sized according to the capacity required by the
boiler? Is it equipped with all safety and control devices required by the standards in force?

is the power supply of the boiler 230V - 50Hz?

has the system been lled with water (approximately 0.8/1 bar pressure on the pressure gauge with the pump stopped)?

Has the condensation drain trap been lled with water as indicated in chapter 3.8?

are any system shut-o󰀨 gate valves open?

does the gas to be used correspond to the boiler calibration gas?: otherwise, perform
the boiler conversion in order to use the gas available;

this operation must be carried out by technical sta󰀨 qualied in compliance with the standards in force;

is the gas supply valve open?

Before commissioning the boiler, check the following:

ENGLISH

has the system been checked for gas leaks?

is the outside main switch ON?

is the system safety valve e󰀩cient and is it connected to the drains?

is the condensation drain trap connected to the drains?

has the system been checked for water leaks?

are the ventilation conditions and minimum distances to perform any maintenance
ensured?

have the GAS, HEATING and DOMESTIC HOT WATER pipes been cleaned thoroughly with products suitable for
each circuit?

has a surveillance and protection system against gas leaks been installed? (Optional)

are the system pipes NOT used as the electrical system earthing?

has the system been sized properly bearing in mind the radiator pressure drops,
thermostatic valves, radiator stop valves?

has the operator been trained and has the documentation been supplied?

Please tick the completed operations

Switching boiler on and o󰀨

To switch the boiler on and o󰀨, see the Uy reg­ulator manual

Installation instructions

35

3.12 -

3

1

2

4

MEASUREMENT OF THE COMBUSTION EFFICIENCY DURING INSTALLATION Generator Menu

3.12.1 - CALIBRATION FUNCTION (CHIMNEY SWEEP)

ATTENTION!
Function reserved for After Sale
Service Centres only.

3.12.2 - POSITIONING THE SENSORS

To determine the combustion e󰀩ciency

one must make the following measurements:

- measurement of the combustion air temperature

- measurement of the ue gas temperature and content of

CO2 taken in the relevant hole 2.

Take the measurements with the generator in steady state
conditions (see par. 3.12.1).

ATTENTION!

These functions are explained in

chapter 2.9 (Burner menu) of the
Uy P. TOUCH CONTROL instal­lation and maintenance manual.

All boilers leave the factory already calibrated
and tested. However, if the calibration conditions

should be modied, it is necessary to recalibrate

the gas valve.

ATTENTION!

Remove cap 2, x the red cap 3 to the ue gas
inlet 1. Insert the CO2 analysis sensor 4 in the
cap hole.
Perform the measurement. Remove the cap

and close the ue gas exhaust inlet with the

specic cap 2.

36

3.13 - ADJUSTING THE BURNER

A

B

B

B

A

C

D

All boilers leave the factory already calibrated and
tested, however, if required, recalibrate the gas
valves (MODULE 1, MODULE 2, etc.)

The following instructions are intended exclusively
for authorised service personnel.

ENGLISH

ATTENTION!

To access the gas valves more easily, release the electrical panel
“A” by means of the springs “B” (right and left).
Slightly turn the electrical panel ”A” and lower the tilting panel
“C”.
Fix the tilting panel “C” for the time necessary for the adjustment
operation, using the 2 M4 screws + washers ”D” (contained in
the documentation bag).

Installation instructions

37

- Remove the cap and insert the CO2 analysis sensor in the

ue gas sample point of the intake/exhaust terminal, see

chap. 3.12.2.

1) Maximum output adjustment

- Operate the boiler in “calibration” mode at MAXIMUM OUT­PUT (see 3.12.1)

- Once the burner is on, check

that the “MAXIMUM” CO2 output value corresponds to that

indicated in the “NOZZLES - PRESSURE” table.

- If necessary, adjust the value by turning the ‘’S’’ adjustment

screw CLOCKWISE to decrease it and ANTICLOCKWISE
to increase it

(see NOZZLES-CAPACITY-PRESSURE table).

2) Minimum output adjustment

- Operate the boiler in “calibration” mode at MINIMUM OUTPUT
(see 3.12.1)

- Once the burner is on, check that the “MINIMUM” CO2 output
value corresponds to what is indicated in the “NOZZLES ­PRESSURE” table.

- If necessary, adjust the value by turning (with a 2.5 mm hex

key) screw “R” CLOCKWISE to increase it, ANTICLOCK­WISE to decrease it

(see NOZZLES-CAPACITY-PRESSURE table).

(S)

ADJUSTMENT SCREW

MAXIMUM OUTPUT

In case of replacement of the Gas valve or

ignition di󰀩culties:

Tighten the maximum adjustment screw ”A”

clockwise up to the stop, then loosen by 7 turns.
Check the boiler ignition, in case of a block,
loosen the screw “A” again by one turn, then try
igniting it again. If the boiler still stops running,
perform the above operations again until the
boiler ignites.

Now adjust the burner as previously illustrated.

(R)

ADJUSTMENT SCREW

MINIMUM OUTPUT

38

Follow this procedure to also adjust the other modules.

1

If the capacity read is too low, make sure the power feed and
drain system (feed and drain pipes) are not clogged.
If they are not clogged, make sure the burner and/or heat ex­changer is not dirty.

ENGLISH

ATTENTION
To calibrate the VG (Gas Valves) in the
boiler room, follow the procedures below.

The VG must be calibrated
with chimney pressure = 0 Pa;
for this reason:

- open the smoke duct 1 inspection door,
after calibration, restore the door gasket.

INDICATIVE DIAGRAM, REFERRING TO BOILERS
MODULEX 150 ÷ 350

C) CONCLUSION OF THE BASIC

CALIBRATIONS

- Check the CO2 values at minimum and maximum levels.

- If necessary, make any adjustments.

For proper operation, the CO2 values must be
calibrated with particular attention, observing
the values indicated in the table.

- Close the ue gas inspection inlet (1) with the specic cap

(2 - 3)

NOTE: Do not force the end stroke limits
of the adjustment screw.

NOZZLES - PRESSURE - CAPACITY TABLE

MODULEX EXT: 440 - 550 - 660 - 770 - 900

Type of Gas Supply Press. Ø Noz-

[mbar] (mm) [Ø/mm] min FL max FU [%] [%]

min max IG

Nat. gas (G20) 20 9 NO 29 96 9.0 9.0 50

Nat. gas (G25) 25 9 NO 28 98 9.1 8.6 50

Nat. gas (G27) 20 9 YES 28 94 9.1 9.3 50

Propane (G31) 37 9 NO 28 90 10.2 10.4 50

MODULEX EXT: 348

Type of Gas Supply Press. Ø Noz-

[mbar] (mm) [Ø/mm] min max [%] [%]

min max IG

Nat. gas (G20) 20 9 NO 29 76 9.0 9.0 50

Nat. gas (G25) 25 9 NO 28 82 9.1 8.6 50

Nat. gas (G27) 20 9 YES 28 94 9.1 9.3 50

Propane (G31) 37 9 NO 28 73 10.2 10.4 50

zles

zles

Fan

deector

Fan

deector

Fan speed CO

Fan speed CO

levels Start.

2

levels Start.

2

power

power

Installation instructions

39

3.14 - EMERGENCY OPERATION AND SAFETY DEVICES

F1

AE

G

H

F

I

18:28

giov 30 20ott 18

effettiva

richiesta

76

°C

84

°C

generatore

10/10

modulazione

100

%

INFO MENU

status

sanitaria

25

°C

The BCM prevents system shutdown if the man-

agement of the Uy system or main boiler system

is out of service
(Refer to the BCM manual)

A

YELLOW LED = ashing

(communication between BMM and BCM) ok

GREEN LED = on (Pump Active)

RED LED = on (Error code detected)

E Uy control panel

F TLG triggering lamp Main Limit Thermostat

G Fuse

H Main Switch

TLG Main Limit Thermostat, when it triggers it cuts

I

power to the boiler, the F lamp lights up. To rearm,
remove the cap and press.

Condensate level sensor position

NOTE:
The devices are positioned under the casing, next
to the control unit.

NOTE: The emergency function only activates the

boiler burners at 100% on ow. All system loads,

including the manifold pump, must be manually
controlled.

40

3.15 - PROGRAMMING THE OPERATING PARAMETERS

ATTENTION!

ATTENTION!
Function reserved for After Sale
Service Centres only.

BMM parameters

Code Symbol Description Unit Min. Max. Imp. Fab.

803 Srv Enabled Services 0 1

48

784 BC Local BUS address 0 7

816 MI Modbus Address 1 127

817 MT Modbus Time-out sec. 0 240

896 TU °Fahrenheit 0 1

799 AC Input 0/10V 0 2

376 DI1 Programmable Input #1 0 3

322 Po Pump: Post-circulation min. 1 30

341 PL Pump: Minimum Control % 0 100

313 Pr Pump: Maximum Control % 0 100

31 HL CH#1: Minimum Set-point °C 20 85

39 HH CH#1: Maximum Set-point °C 20 85

792 CHP CH: Max. Modulation % 0 100

619 IG Ignition Modulation % 30 80

527 PU Fan: PPR 0 3

486 FP Fan: Reg. Prop. 0 50

487 FI Fan: Reg. Int. 0 50

489 Fpl Fan: PWM min. % 5 15

337 Fr Modulation Gradient % 1.0

526 FU Fan: Max Max. Hz 50 120

319 FH Maximum Modulation % 1.0

346 FL Minimum Modulation % 1.0

314 Sb Modulation on Standby % 0 100

620 IP Postpurge: Fan % 0 100

617 IGL Ignition: Mod. Min. % 0 100

618 IGH Ignition: Mod. Max. % 0 100

353 HP CH PID: Proportional °K 0 50

354 HI CH PID: Integrative 0 50

478 Hd CH PID: Derivative 0 50

34 HY Burner Hysteresis °K 5.0 20.0

336 HS Temperature Gradient

483 rP

380 Al1 Programmable Sensor #1 0 2

777 AFC APS Control 0 2

805 LV Mains Voltage V 100 240

2590 Burner Output kW 10 1000

( ) LPG values

ChSet

CH#1: Set-point °C 20 85

°C/min

Gen: Temp. Max Di󰀨erential

°C 0.0 50.0

These functions are explained

in chapter 2.8 (DEVICES menu)

of the Uy P. TOUCH CONTROL

installation and maintenance
manual.

100.0

100.0

100.0

0 30

ENGLISH

Installation instructions

41

BCM Parameters

Code Symbol Description Unit Min. Max. Imp. Fab.

803 Srv Enabled Services 16 27

483 rP Gen: Temp. Max Di󰀨erential °K 0.0 50.0

34 HY Burner Hysteresis °K 5.0 20.0

31 HL CH#1: Minimum Set-point °C 20.0 40.0

39 HH CH#1: Maximum Set-point °C 45.0 85.0

799 AC Input 0/10V 0 3

376 DI1 Programmable Input #1 0 2

322 Po Pump: Post-circulation min. 1 10

341 PL Pump: Minimum Control V 0 10

313 Pr Pump: Maximum Control V 0 10

792 CHP CH: Max. Modulation % 0 100

611 POT Gen: Err. Max. Parallel °K 0 30

612 POL Gen: Mod. Max. Parallel % 0 100

650 dL DHW: Minimum Set-point °C 25.0 45.0

385 dH DHW: Maximum Set-point 50.0 65.0

360 dt Heater Adjustment 0 15

656 drT DHW: Temp. Requested Di󰀨erential °K -20

20

657 drH DHW: Requested Temp. Hysteresis °K 1 20

310 DpT DHW Pump: Postcirc. sec. 5

660 dbT DHW: Temp. Maximum Boiler °C 50.0

48 ChSet CH#1: Set-point °C 20.0

600

85.0

85.0

64 ChPO1 CH#1: Parallel Supply 0 1

346 FL Minimum Modulation % 0 100.0

600 mB Burners: Min. Inserted 1 8

616 BSt Gen: Insertion Time sec. 30 900

613 BRt Gen: Removal Time sec. 30 900

336 HS Temperature Gradient °C/min 1 30

353 HP CH PID: Proportional °K 0 50

354 HI CH PID: Integrative °K 0 50

478 Hd CH PID: Derivative °K 0 50

816 MI Modbus Address 1 127

817 MT Modbus Time-out sec. 0 240

896 TU °Fahrenheit 0 1

309 St Application Code 0 1

368 VA1 Programmable Relay #1 0 1

369 VA2 Programmable Relay #2 0 1

771 PS Water Pressure Sensor 0 1

768 LG Sens. Min. Gas Pressure 0 1

793 COC Chimney Obstruction Sensor 0 2

622 FS Minimum Flow Sensor 0 1

42

3.16 - ERROR CODES

ENGLISH

Fault that causes the boiler to stop:

- The error code is displayed, the boiler has stopped
running. After solving the failure, press Reset to
restart the boiler.

CODE DESCRIPTION

detected on BMM

01

04

05

06

SAFETY THERMOSTAT
Triggering of the safety thermostat (10)

BURNER

No gas or failed burner ignition

FLAME LOSS
DURING
OPERATION.

HIGH TEMPERATURE

Boiler temperature too high

INTERNAL FAULT

SOLUTIONS

Press the release button on the panel and/or check that the thermostat
and its connections are not blocked, and make sure the INTC switches
are closed (position 1)

Check the gas supply or that the ignition/detection electrode is working
properly (4).

Check the detection electrode

Check pump operation and if needed
clean the heat exchanger (24)

10
11

12
14
15

16

Flame detection prior to ignition (parasite

ame)

HEATING SENSOR (11)

Heating sensor fault

RETURN SENSOR (if present)
Auxiliary (SRR) sensor interrupted

INSUFFICIENT WATER
CIRCULATION

Primary circuit water circulation insu󰀩­cient (∆t > 40° C)

HEAT EXCHANGER

FREEZING ( 24 )

Heat exchanger freezing is detected. If

the heating sensor detects a temperature

below 2° C, burner ignition is inhibited

until the sensor detects a temperature

above 5°C.

Check the e󰀩ciency of the sensor (see Res/Temp table) (Par.4) or its

connections.

Check the wiring, if needed, replace the auxiliary sensor (22)

Check pump operation and its speed - remove any obstructions in the
heating system

Disconnect power, close the gas valve, defrost the heat exchanger
carefully.

Fault that does NOT cause the boiler to stop:

- The error code is displayed, the boiler has a heat­ing request, Reset icon (informing that a failure has
been detected, even if the fault was temporary).
Therefore, you must always carry out reset to can­cel the word “Error” displayed.

( Num ) = see key Par. 2.2

Installation instructions

43

22

NO AIR UPON IGNITION

Stop

UNEXPECTED AIR FLOW Blocked min pressure switch (closed)

23
24

26

27
30

32

CODE DESCRIPTION

2

17

19

28
29

37

38

40
56

57
58

SPEED OUT OF CONTROL

Alteration of the fan speed; the speed is
not reached.

SPEED OUT OF CONTROL

Alteration of the fan speed; the speed is
above that requested

NO AIR

Stop

FACTORY PARAMETERS

Alteration of the factory parameters or
possible electromagnetic interferences.

Line voltage at 80% of the nominal val­ue. Wait until the line voltage is > 85%
of the nominal value.

detected on HCM (BCM)

GAS PRESSURE MINIMUM PRES­SURE SWITCH TRIGGERED

stop e󰀨ect

HEAT EXCHANGER

FREEZING ( 24 )

stop e󰀨ect

FLOW
OVERTEMPERATURE.

It is activated when the ow temperature

is > 95. Resetting is automatically carried
out when the temperature is < 80.
Eect: Stop burner, Pump On

CLOGGED OUTLETS

Stop

WATER IN THE COMBUSTION CHAM­BER

Stop

PARAMETERS MEMORY

DEFECTIVE

Flame Block

DAMAGED DEFAULT PARAMETERS
due to electromagnetic interferences
stop

FL INTERVENTION insu󰀩cient water

circulation Stop

NO REMOTE CONTROL DETECTED

Flame Block

BMM BOARD NOT DETECTED
stop

FLOW SENSOR

Stop

Check that the fan head is at least 60 Pa.

Check fan operation (18) and the connections

Check fan operation (18) and the connections

Check that the fan head is at least 60 Pa.

Press the unblock key; if the anomaly persists, replace the board

Correction: if the line voltage is < 190Vac: the line voltage is really be­low the minimum limit, otherwise there is a monitor line error: replace
BMM

SOLUTIONS

The ignition procedure is inhibited until gas pressure
reaches the correct values.

Try to Reset since the system automatically activates an antifreeze
function, therefore, it could only be a warning.

Circulation control

Check the Chimneys / Check the trap.

Check the combustion chamber / check the siphon.

Contact Customer Care

Contact Customer Care

Check water circulation

Check electrical connections e-BUS1

check electrical connections BMM and e-BUS

Connect a new sensor if the code disappears, replace the sensor other­wise check the electrical connections

93

The error codes are displayed in the info row of the remote console and remain there even if the fault is temporary.
Therefore, you must always carry out a reset to cancel the word “Alarm” displayed.

44

ISPESL SAFETY DEVICES TRIG­GERING

Stop

check the safety devices, manually reset after releasing each individual
safety device

4

INSPECTION AND
MAINTENANCE

Inspections and maintenance performed profes­sionally and according to a regular schedule, as
well as the use of original spare parts, are of the
utmost importance for fault-free operation of the
boiler and to guarantee its long life.
Yearly maintenance of the appliance is mandatory
in compliance with the Laws in force.

4.1 - INSPECTION AND MAINTENANCE
INSTRUCTIONS

To assure long-term functioning of your appliance and to avoid
altering its approved status, only original UNICAL spare parts
must be used.

If a component needs to be replaced:

• Disconnect the appliance from the electrical mains and make

sure that it cannot be reconnected accidentally.

• Close the gas shut-o󰀨 valve upstream of the boiler.

• If needed, and depending on the intervention to be carried

out, close any shut-o󰀨 valves on the ow and return line of

the heating system, as well as the cold water inlet valve.

Failure to perform Inspections and Maintenance
can entail material and personal damage

Once all maintenance operations are complete
resume boiler operation

• Open the heating ow and return pipes, as well as the cold

water inlet valve (if closed previously).

• Vent and, if necessary, restore the heating pressure until

reaching a pressure of 0.8/1.0 bar.

• Open the gas shut-o󰀨 valve.

• Switch the boiler on

• Make sure the appliance is gas tight and watertight.

ENGLISH

OBLIGATION!
wear protective gloves

TABLE OF THE RESISTANCE VALUES ACCORDING TO THE TEMPERATURE, HEATING SENSOR (SR) AND DHW
SENSOR (SS) AND HEATING RETURN SENSOR, IF ANY (SRR)

T°C 0 1 2 3 4 5 6 7 8 9

0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987

10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153

20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466

30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584

40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768

50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596

60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824

70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304

80 1263 1222 1183 1146 111 0 1075 1042 1010 979 949

90 920 892 865 839 814 790 766 744 722 701

Relation between the temperature (°C) and the nom. resistance (Ohm) of the heating sensor SR and of the domestic
hot water sensor SS

Example: At 25°C, the nominal resistance is 10067 Ohm At 90°C, the nominal resistance is 920 Ohm

Danger of burns!

Caution during maintenance operations.

Installation instructions

45

We recommend having qualified technical
personnel carry out the provisions of current
regulation concerning periodic maintenance
checks.

Since the dust is vacuumed inside, the  ue gas side resistance,

through the boiler, increases which, eventually, will lead to a
reduction of the thermal load (and, consequently, of the power).
Before cleaning, check the thermal load (see 3.13) and the
CO2 percentage (see 3.13). If the read load (with correct CO2)
is around 5% of the indicated value, the boiler does not need
to be cleaned.
Therefore, the operation can be limited to cleaning the siphon

ATTENTION!
A drop in thermal load may be caused by the
obstruction of the exhaust duct or of the air inlet
duct. Firstly check that this is not the cause.

If a load reduction is detected of more than 5%,
check the cleanliness of the condensate collec­tion pan and of the burner. Clean the siphon also.

First phase – Disassembly

• Close the power and gas supply ensuring that the valve is

closed properly.

• Remove:

- all casings

- Act on the two rear closing hinges to remove the cover

- Remove the casing fastening screws, rear, front and lateral.

- Turn the indicated screw to lift the cover

- Remove the 2 cover fastening screws

46

- Remove the red silicon pipes and then the fan chamber

• Element screws

ENGLISH

- Release the fan chamber fastening spring

(right/left side).

Installation instructions

- Remove screws “A” for each element

(with socket wrench and 13 mm  at spanner)

47

• Element screws

- Remove screws “A” for each element
(with 13 mm socket wrench)

- Remove the screws “B” (with 13 mm socket wrench / 13
mm hex spanner) and remove the fastening plates

- Remove the gas pipe fastening screws (right and
left sides)

- Remove the four screws with a 10 mm socket wrench, then

the gas  ange

48

- Slightly lift the rear burner block and remove the 2 pins
using a 5 mm hex spanner, until you reach the holes “C”
(left and right side).

ENGLISH

- Lift the burner block (front part)

- Remove the gas  ttings from the gas manifold using the 36

mm  at spanner.

Installation instructions

49

Second phase – Cleaning

• Remove the gaskets and the burners.

• Dry clean the burners by blowing compressed air from the
“ame side”

• Visually inspect the welding on the corner pieces and on the

burner mesh.

The burner gaskets must be replaced at each
cleaning operation.

• Wash the combustion chamber with water, taking care not to

wet the electrical wiring.

During this operation, make sure that the condensate drain

pipe always remains clear so that the washing water does
not leak from the inspection opening.

• Blow the combustion chamber with compressed air, trying to

remove any dirt still attached to the pins.

• When the parts have been washed, make sure that the con­densate drain trap is clear: clean it if necessary

• Inspect the ue gas exhaust pipe and the ue

Third phase – Re-assembly

• After cleaning the body and/or burners, put the burners back

in their seats

• Position the new graphite gaskets

When reassembling, proceed in reverse
order, taking care to tighten the fastening

screws of the mixer/fan unit to the body, with

13 Nm tightening torque

ATTENTION
AT EACH MAINTENANCE OPERATION, IT IS
MANDATORY TO REPLACE THE SEALING
GASKETS OF EACH BURNER.

• Before ignition, check that the condensation drain trap is
properly lled with water.

• Before opening the gas supply valve again make sure that
the previously loosened gas tting, is tight. To do this, open

the valve and check its seal with soapy solution.

• As a burner ignites, immediately check the seals between

each individual gas valve and its premixing chamber

• Analyse the combustion and check its parameters.

• Make sure that all opened gas pressure sockets are closed.

50

ENGLISH

PAGE LEFT INTENTIONALLY BLANK

Installation instructions

51

BL- N

BR - L1

R

BK

F-6,3A

A2

3

1

4

2

Modbus A

Modbus B

A1

Ufly

BR

BL

BK GND

BR eBU S+

R +24V

13 2

BR

BL

Y/G

BR

BK

BR

BL

BR

IG

2

1

GND

A4

3

1

4

2

1

23

A3

3

142

2
1

C

4L

1N

5L

2N

GND

+24V

eBUS+

IG1

IG2

YG/

Ufly

(M3)

ALIM.

230 V - 50 Hz

1b1a

BR

BL

Y/G

BCM

R

BR

BK

123

4

5

6

7

A2

A1

A4

A3

Y2

Y1

Y3

GND

1

2

123

BL

BR

Y G/

ST1

1

R

R

FILTER

4

N° MOD.

1

2-3

52 2-3/4-5

62 2-3/4-5

73 2-3/4-5/6-7

N

L1BR
BL
YG/

2

1

2

1

BK GN D

BR +e BUS

E.RIL.

1-7/8

TEFLON WH

BL

BR

YG/

ST2

1

BK (-)

BR (PWM)

BL (TA CHO)

OR (+)

OR +24V

BL XWDC

1
2

3
4

1

2

3
4

A2/A3-A2/A3

BMM2-7/8

PHS

1-2: FASEHNOT SENS.
2-3: FASE SENSIBH.

PIN1

123

4
56

789101112

123

4
5678

Y1

1
2

34

A2

1
2

34

A3

A1

123

456

A4

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

ROD1 ROD

F1

A2

BK GN D

BR +e BUS

OR +24V

BL XWDC

1
2

3

4

A3

(*) EXT 100 ÷ 350

C

NO

C NO

123

4
56

789101112

A4

S1R

WH

WH

SR

WH

WH

WH

BR

BL

BL

PF

min

TL T1L

BL

BL

ONLY

AUSTRALIA

MOD. 1

PF

min.

MOD. 2 - 7

BL

SR
2-7

PF

min

TL

2-7

WH

WH

WH

WH

BL

A4

123

4
56

789101112

123

456

A1

VM (R)

1 - 7 / 8

2345

A8

321 4

765 8

321

A7

4 5 6

A5

A6

eBUS +
eBUS

+ 24 V

MOD. 1

KITSHC

(+24 V only

for 1SHC)

VM (A)

23

BR
BL

L1

N

BL

BR

Y G/

ST1

1

VM (A)

23

BR
BL

BL

BR

Y G/

ST1

1

VM (A)

23

ST1

1

VM (A)

23

BL

BR

Y G/

BR
BL

1° Mod.

intermediate /

last module

FILTER POSITIONBETWEEN MOD.

ALIM.VENT.

ALIM.VENT.

EXT 100 ÷ 350

L1

N

BL

BR

Y G/

ST1

1

VM (A)

23

L1

N

BL

BR

Y G/

ST1

1

VM (A)

23

FILTER

(MV1)

BL BL

BK

BK

BK

BK

FILTER

ALIM.VENT.

EXT 440 ÷ 900

ALIM.VENT.

BMM

ONLY

AUSTRALIA

PF

min.

F1

4.2 - PRACTICAL CONNECTION WIRING DIAGRAM

L1

N

N

L1

N

L1

(MV1)

L1

L1

(M2)

N

(M1)

N

KEY

E. ACC. Ignition electrode

E. RIL. Detection electrode

HSCP / Uy Temperature control

SR Heating sensor (only mod.1)

SR 1...7 Local heating sensor

PF Flue gas press. switch (only mod.1)

PF min Flue gas minimum press. switch (only mod.1)

SL Condensate level sensor (mod.2)

T. ACC Ignition transformation

TL Limit thermostat

TL 1....7 Local limit thermostat

VG Gas valve

VM (A) Modulating Fan Power Supply

VM (R) Modulating Fan Det./Adjustment

SRR Global return sensor

PG

IG

Gas pressure switch

Main switch

52

SE

124

A4

ALIM (50)

+24V

GND

eBUS+

2134567

9

81011121314

2

1

C

NC

31

4

11

3

10

8

2

9

1

C

NO

13

6

A1

BR

WH

WH

WH

BR

BR

WH

BR

R

R

OR

OR

PF SL PG SRR

SMG

WH

WH

R

BK

BR

N

L1BR
BL
YG/

A5/A6-A5/A6

BMM2-7

2

1

2

1

E.RIL.

1-7/8

TEFLON WH

N

L

V1

N

L1

BL

BR

YG/

PHS

A8

321 4

765 8

321

A7

4 5 6

A5

2

1

A6

2

1

ROD1 ROD

F1

(*) EXT 440 ÷ 900

C

NO

C NO

123

4
56

789101112

A4

S1R

WH

BK

SR

WH

BK

WH

BR

BL

BL

PF

min

TL T1L

BL

BL

MOD. 1

MOD. 2 - 8

BL

SR
2-8

PF

min

TL

2-8

WH

BK

WH

BK

BL

A4

123

4
56

789101112

A8

321 4

765 8

321

A7

4 5 6

V2

VG

1 - 7 / 8

T. ACC.

1 - 7 / 8

1

E.ACC.

1 - 7 / 8

SILICON- R

YG/

BR

BL

A5

A6

N

BL

BR

Y G/

ST1

1

VM (A)

23

L1

N

BL

BR

Y G/

ST1

1

VM (A)

23

BK

BK

FILTER

(*)

NO

AUSTRALIA

ONLY

AUSTRALIA

PF

min.

ONLY

AUSTRALIA

PF

min.

VI

VIOLA

M2

+24V

G

V

TA

FL

INAIL

R

WH

Stemp. ACC

12 11 10 98 765

Y2

123

COLOURS

BLUE
BROWN
BLACK

ENGLISH

C.P.M.

P. Coll.

GREEN

P. CH

P. Car. DHW

GREY
SKY BLUE
ORANGE

1

2

3

4

PINK
RED
YELLOW
YELLOW GREEN
WHITE
VIOLET

0-10V -

INGR ANA LOG.

GND 0-10V - INGR.

Modbus B

eBUS-

eBUS+

4321

Jp2

4

5

6

COM AND

USC ALL ARM SIGNAL

Modbus A

3

4

Y4

0

1

9

2

8

3

7

4

6

5

2

1

2134567

981011121314

COM AND

COM AND

COM .

3

1

2

Y3

0

9

8

7

6

5

PF

min

Installation instructions

TLG

LTLG

F

BCM (*) the connections reported below are only meant as
an indication and are to be carried out on the services return
terminal boards ‘‘B’’ indicated in chap. 3.10.

Main limit thermostat

Main limit thermostat lamp

Fuse

SMG Global ow sensor

S.temp ACC Storage tank temperature sensor

SE

External temperature sensor

ANALOG INPUT

GND 0-10V ING

0-10V C.P.M.

ALARM SIGNAL

Comm P. COLL

Comm P. CH

P. car DHW

COM.

Analogue input

Analogue input 0-10 V

Modulating Pump Control

Alarm Output

Boiler manifold pump control

Heating pump control

Storage tank loading pump control

Common

53

46033 Casteldario - Mantua - Italy - tel. [phone] - fax [phone]

www.unical.eu

ed. 01/19

st

TRANSLATION OF ORIGINAL INSTRUCTIONS - 00338303EN - 1

AG S.p.A.

[e-mail] - [e-mail] - www.unical.eu

Furthermore, it reserves the right to modify its products as deemed necessary or useful, without a󰀨 ecting their essential features.

Unical shall not be held liable for any inaccuracies due to transcription or printing errors.