Beretta Power Plus Box 1001 INT, Power Plus Box 1001 EXT Installation Manual

Installation Manual

CONDENSING

Power Plus Box 1001 INT-EXT

Installation Manual

EN

This manual, Code 20073959 - Rev. 4 (12/15) comprises 40 pages.

2

RANGE

MODEL CODE

Power Plus Box 1001 INT 20067835
Power Plus Box 1001 EXT 20067836

CERTIFIED COMPANY
UNI EN ISO 9001:2008
UNI EN ISO 14001:2004

This manual, Code

- Rev.
comprises
pages.

ENGLISH

Contents

CONTENTS

The following symbols are used in this manual:

b

CAUTION! =

Identifies actions that require caution

and adequate preparation.

a

STOP! =

Identifies actions that you MUST NOT do.

1 GENERAL INFORMATION ................3

2 WARNINGS............................3

3 TECHNICAL FEATURES .................4

3.1 Main features ............................ 4

3.2 Advantages.............................. 5

3.3 Safety devices............................ 5

3.4 Components ............................. 6

4 INSTALLATION.........................9

4.1 Product packaging and identification.......... 9

4.2 Installation premises ....................... 9

4.3 System cleaning and water treatment ........ 10

4.4 General instructions ...................... 10

4.5 New heating systems ..................... 10

4.6 Upgrading existing systems ................ 10

4.7 Corrosion............................... 10

4.8 Positioning and preparation for installation..... 11

4.9 Condensate outlet........................ 11

4.10 Water circuit ............................ 12

4.11 Exhaust flue............................. 12

5 INSTALLATION DIAGRAMS .............12

6 ELECTRICAL SYSTEM .................14

6.1 Power supply ........................... 14

6.2 Electrical connections..................... 14

6.2.1 Connection to mains ...................... 14

6.2.2 Connection to thermoregulators .............15

6.2.3 Connection to pumps ..................... 15

6.2.4 Connection to room thermostats (on/off) ...... 15

6.2.5 Connection to weather temperature probe..... 15

6.2.6 Frost protection .......................... 16

6.2.7 Connection to 0-10v external thermoregulator ..17

6.2.8 Connection to alarm device ................ 17

6.3 Emergency mode ........................ 17

7 GAS VALVE CALIBRATION ..............18

8 USE AND ADJUSTMENT ................19

8.1 Control panel: description.................. 19

8.2 Display mode ........................... 20

8.3 Display mode ........................... 20

8.4 Changing the user parameters .............. 21

8.5 Monitor mode ........................... 21

8.6 Installer programming mode................ 22

8.7 Test mode .............................. 23

8.8 Error mode ............................. 23

8.9 Permanent block ......................... 23

9 SETTING FUNCTIONING PARAMETERS ...24

9.1 Setting the heating parameters.............. 24

9.2 Setting the DHW parameters ............... 25

9.3 Heat control setting....................... 26

10 LIST OF PARAMETERS .................31

11 ERROR LIST ..........................33

11.1 Master board errors ...................... 33

11.2 Slave board errors ....................... 33

12 WIRING DIAGRAMS....................35

13 TECHNICAL SPECIFICATIONS ...........37

3

1 GENERAL INFORMATION

Dear Customer,
congratulations on your choice and thank you for placing
your confidence in our products. With

Power Plus Box 1001

you have chosen technology that is the very essence of
energy saving and functionality.
Moreover, all B products conform to the strictest
directives and European standards in force.

This product was produced, amongst others, in conformity
to the following directives and standards:

- Directive 2009/142/EC - Gas Appliances

- Directive 92/42/EEC on efficiency requirements
and Annex E and Pres. Republic Decree n. 412, 26
August 1993 (****)

- Electromagnetic Compatibility Directive 2004/108/EC

- Low Voltage Directive 2006/95/EC

- Ecodesign Directive 2009/125/CE for energy-related
products

- Delegated Regulation (EU) N. 813/2013

- EN 15417 Gas-fired central heating boilers - Specific
requirements for condensing boilers with a nominal
heat input greater than 70 kW but not exceeding
1000 kW

- EN 13836 Gas fired central heating boilers - Type B
boilers of nominal heat input exceeding 300 kW, but
not exceeding 1000 kW.

The

Power Plus Box 1001

condensing modular systems
moreover conform to the regulatory provisions pursuant to
the INAIL “R” File, section R.3.B.

B has been certified with UNI EN ISO 9001/2000 since

22.07.2004.

Power Plus Box 1001

is furthermore a product having to its

credit:

- European Conformity Mark (based on Directive
92/42/CEE) issued by the authorized German
certification organization ;

- Maximum energy efficiency class (according to
Directive 92/42/EEC) identified by the symbol ****;

- Classified in the strictest class for nitrogen oxide­related pollution (fifth grade according to UNI EN

297)

- Patented heat exchanger.

2 WARNINGS

b

The heating unit must be used for the purpose for
which it was specifically designed and produced. Any
whatsoever contractual or extra-contractual liabilities
for damages caused to persons, animals or objects
due to errors in installation, adjustment, maintenance
and improper usage are to be excluded.

b

Installation must fully comply with provisions of
the law in force and instructions provided by the
manufacturer to ensure safety and correct functioning,
always calling upon professionally qualified technical
personnel who will issue the declaration of conformity
for the installation accomplished with good
workmanship, in compliance to regulatory provisions
in force and guidelines given in this handbook. The
appliance must be installed in appropriate premises
and together with the specific systems installed
according to the law.

b

Commissioning will be carried out by personnel from
the authorized Technical Assistance Centre only and

within 8 days from when the appliance was installed.
After initial ignition the Technical Assistance Centre
will fill in the warranty certificate, leaving the user their
part to be kept, marking the beginning of the period
of guarantee at the terms and conditions specified
on the relative slip.

The appliance in its original packing
may be exposed to temperatures between 4°C and 40°C.
Do not expose the appliance to bad weather conditions
after it has been unpacked, anyhow to temperatures
below 4°C or above 40°C until it has been connected
up to the water, gas and electricity mains so as to be
able to activate the frost protection systems described in
paragraph 6.2.6.

b

Check that the product is complete, undamaged
and as ordered as soon as you receive it. Report any
discrepancies or damage to the B dealer who sold it.

b

In case of leaks, disconnect the heating unit from the
mains, close the water from the mains and promptly
contact the Technical Assistance Centre.

b

Regularly check that the condensate drain is free from
obstruction.

b

Regularly check that the working pressure of the water
circulation system, when cold, is below the maximum limit
specified for the appliance. If not, contact the Technical
Assistance Centre.

b

Maintenance jobs on the heating unit must be carried out
by personnel from the authorized Technical Assistance
Centre. Maintenance must be performed at least once a
year. Correct maintenance is essential for safety as well
as for the efficiency and long working life of the product.
Proper maintenance keeps consumption and emissions
down, and ensures that the product continues to operate
reliably over time. Analyse the combustion fumes before
commencing maintenance. The results of fume analysis
can give a clear idea of what servicing or repairs are
needed.

b

We recommend cleaning inside the exchanger once
a year, extracting jet and burner and removing any
installation debris by suction. This operation will be done
by personnel from the Technical Assistance Centre only.

b

The warranty slip endorsed during the course of
commissioning will have to be produced for any servicing
required during the guarantee period. The manufacturer
shall not be held liable for any damages caused by
mishandling, improper use or errors in installation, use
and maintenance work on the appliance. In the event
of breakdown or malfunction switch off the appliance,
avoiding to make any attempt to repair it and contact the
Technical Assistance Centre.

b

This manual must be read carefully for the boiler to be
used rationally and safely, and must be kept with care
so as to be on hand where required by the technician or
installer, to facilitate the appropriate installation, running
and maintenance of the boiler. B will not be held
liable for any translations possibly giving rise to wrong
interpretation. This manual is an integral part of the
heating unit and must consequently be kept with care
and must ALWAYS accompany the boiler even when
passed on to another owner or user or transferred to
another installation. Ask the Technical Assistance Centre
for another copy if it should be lost or damaged.

4

a

Children and people with disabilities or without
experience and specific knowledge are forbidden to use
the heating unit unless they are assisted by a qualified
person responsible for their safety.

It is forbidden to use
electrical devices or equipment, such as switches,
appliances, etc. if there is a smell of gas or un-burnt
products. If so:

- ventilate the room, opening doors and windows;

- close the gas valve at the mains;

- immediately call in the Technical Assistance Centre
or professionally qualified personnel.

a

It is forbidden to touch the heating unit with bare feet
or parts of the body wet.

a

It is forbidden to start on any technical or cleaning
jobs before disconnecting the heating unit from the
power mains.

a

It is forbidden to alter the safety and adjustment
devices without permission and instructions from the
heating unit manufacturer.

a

It is forbidden to obstruct the condensate drain.

a

It is forbidden to pull, detach, twist the wiring coming
out of the heating unit, even if unplugged from the
power supply.

a

It is forbidden to obstruct or reduce the size of air
vents.

a

It is forbidden to expose the boiler to atmospheric
agents (if it is not a specific unit for outdoors).

a

It is forbidden to leave containers or flammable
substances in the premises where the boiler is
installed.

a

Do not dispose of packaging material into the
environment, or leave it within the reach of children,
since it can become a potential hazard. Dispose of
packaging material in compliance with applicable
legislation.

a

The user is forbidden to open the cupboard containing
the heating unit. Any jobs on the inside of the latter
must be done by the Technical Assistance Centre or
by qualified personnel.

a

It is forbidden to discard the product as household
waste. At the end of its service life, it can be
consigned to specific selected waste centres
provided by the local authorities or else to dealers
providing this service. Disposing of a domestic
appliance separately will prevent possible harmful
consequences for environment and health derived
from inappropriate disposal, likewise making it
possible to recuperate the materials it is made of with
substantial savings in energy and resources.

3 TECHNICAL FEATURES

3.1 Main features

Power Plus Box 1001

is a modular condensing, premixed,
jet heating unit, comprising a modular unit at 26 to 128 kW
equipped with weather adjustment device.
The efficiency of the generators reaches 109% based
on the lower heat potential of natural gas (Hi) making it
possible to use a flue manifold entirely made of plastic
(PP). The system also enables continual modulation of the
gas and combustion air flow.
The

Power Plus Box 1001

heating unit is the optimum as far

as operating costs (up to 109% efficiency per Hi, see Figure

1), reliability and flexibility is concerned. Rapid connection
to any type of heating and domestic hot water system
with accumulation is in fact possible owing to a special
more powerful heat exchanger, new electronic control,
modulating electronic circulator and high efficiency.
Furthermore, the “master” board, supplied with each
heating unit, ensures the latter a simple conFiguretion and
enables it to be adapted to any type of system, optimizing
its performance in terms of creating comfort and cutting
down on consumption.
All the safety devices provided in the INAIL “R” File for
this particular application, have been installed on the flow
manifold, downstream from the last combustion unit.
A special water compensator is housed inside the hood
with attachments for simple connection to the systems
directly controlled by the master board which is supplied
with the heating unit:

- Direct system (high temperature)

- Mixed system (low temperature)

- Hot water system.

Distribution units are available as an accessory for each of
the above mentioned systems.
The heating unit thus becomes a complete, versatile
functional “system” to install in a variety of plant typologies.
All the systems and relevant functional components
(circulators, mixer valve and temperature probe) are
entirely controlled by the master board and are connected
up to the latter, without the help of additional boards.
Room thermostats in the unit’s system-related areas can
also be connected up to said board.
The system can also be extended to numerous additional
zones by a board called “zone master”, which is not
included in this manual.

5

Figure 1

3.2 Advantages

- Totally pre-mixed micro-flame jet burner;

- condensing stainless steel exchanger, with efficiency
up to 109% (see Figure 1);

- maximum exhaust flue exit temperature 80°C;

- PPS plastic exhaust flue manifold, self-extinguishing
(see paragraph 4.11);

- modulating electronic primary circulator at low
consumption;

- weather temperature adjustment device supplied;

- hot water and systems control at different
temperatures, with or without function priority;

- automatic summer/winter switch-over;

- minimum flow capacity of thermal carrier fluid
controlled by a differen-tial pressure switch;

- compensator with inner partition for connection to
three systems;

- INAIL safety organs mounted in factory;

- appliance complete and ready to be connected up to
the installation.

3.3 Safety devices

All the heating unit functions are electrically controlled and
any fault will cause arrest of the heating unit and the gas
valve to automatically close.
The water circulation system includes:

- automatic resetting safety thermostat;

- differential water pressure switch acting as a
flowmeter;

- temperature probe on flow and return controlled
by a certified electronic device to carry out safety
functions with dual-processor technology. The
flow temperature is continually controlled by these
devices as well as the Δt between flow and return by
acting on the primary circulator modulation;

- modular flow temperature adjustment.

The combustion system includes:

- gas solenoid valve in B+C class with pneumatically
compensated gas flow dependent on air intake flow
capacity (air/gas ratio 1:1);

- ionization electrode for continual flame control;

- exhaust flue duct temperature control.

Protective actions and therefore closure of gas valves on
each heating unit are activated in the following cases:

- flame burnt out;

- over-temperature in exchanger system;

- high temperature of exhaust fumes;

- reduced air flow.

a

The appliance must not be started up, even
temporarily, where the safety devices have been
mishandled or excluded.

b

Safety devices must be replaced by the authorized
Technical Assistance Centre only, exclusively using
original parts.

6

3.4 Components

Power Plus Box 1001

comprises a metal cupboard
containing the condensing combustion unit connected to
a separator, also acting as a distribution organ to three
distinct systems (high T, low T and hot water), see diagram
in Figure 2.

Figure 2

1

Heat exchanger

2

Burner

3

Jet

4

Venturi tubes

5

Gas valve

6

Vent valve

7

Safety thermostat

8

Min. and differential pressure

9

Flow temperature control

10

Return temperature control

11

Flue temperature control

12

Return pipe

13

Flow pipe

14

Gas pipe

15

Air inlet

16

Exhaust flue duct

17

Condensate outlet

18

Condensate manifold

19

Two-way gas valve

20

Fuel check valve

21

Separator

22

Separator drain cock

23

Separator vent valve

24

Modulating circulator

25

VIC probe pit

26

Safety valve

27

Max. INAIL pressure gauge

28

INAIL gauge

29

INAIL thermometer

30

Expansion tank opening

7

DIMENSIONS AND CONNECTION POSITIONS

Power Plus Box 1001 INT

Figure 3

Power Plus Box 1001 EXT

Figure 4

1

Flow low temperature

2

Return low temperature

3

Flow high temperature

4

Return high temperature

5

Return high temperature

6

Return hot water

7

Flow low temperature*

8

Return low temperature*

9

Return high temperature*

10

Return hot water*

11

Condensate outlet

12

Exhaust flue duct

13

Gas inlet

8

SYSTEM COMPONENTS

Figure 5

1

Hydraulic separator

2

Flow pipe

3

Return pipe

4

Gas pipe

5

Vent valve

6

Cock

7

Drain cock

8

Temperature gauge

9

Gauge fitting with cock

10

Damper device for gauge

11

Pressure gauge

12

Thermometer pit

13

Maximum pressure switch

14

Fuel check valve

15

5.4 bar safety valve

16

Expansion tank/filling fitting

17

Flow probe pit

18

Exchanger

19

Burner

20

Fan

21

Venturi tubes

22

Air inlet pipe

23

Gas valve

24

Exhaust flue duct

25

Condensate drainpipe

26

Vent valve

27

Ignition detection electrode

28

Safety thermostat

29

Gas cock

30

Diff. Pressure switch

31

Condensate drain manifold

32

Return probe

33

Exhaust flue probe

34

Master board

35

Slave board

36

Pump control board

37

Flow hot water system connection

38

Return hot water system connection

39

Flow high temperature connection

40

Return high temperature connection

41

Flow low temperature connection

42

Return low temperature connection

43

Modulating circulator

9

4 INSTALLATION

b

Power Plus Box 1001

heating units must be installed
in conformity to the latest provisions of the law
and standards in force concerning heating units,
condensing boilers and/or other applicable regulatory
provisions.

4.1 Product packaging and

identication

The

Power Plus Box 1001

heating unit is supplied, packed

and protected by a strapped carton.

Figure 6

1

Boiler

2

Control panel

3

EC marking/Symbol cartouche

4

Packaging

5

Polyester corners

6

Polyester protection panel

7

Strap

Details of the product are written on the outside: model,
power, version and type of fuel. Contact your local dealer
in case of any differences with the order.
Ensure the goods are intact and complete after unpacking
them.

b

Do not leave the packaging within the reach of
children as it could be a potential source of danger.

The tag on the front side of the boiler’s electrical board,
contains the following information:

- Product name

- Serial number

- Product identification code

- CE certification number

- Gas type and pressures from mains

- Power type from mains

- Rated heat capacity (Qn)

- Rated working power (Pn)

- Efficiency according to 92/42/EEC Directive (η)

- Max pressure and temperature (Pms)

- Primary system (T)

- NOx class (NOx)

Figure 7

a

It is forbidden to remove or mishandle the identification
plates, markings and any other making it difficult to
safely identify the product.

CONNECTION

DIMENSION

CONNECTION

TYPE

REMARKS

Water

distribution

2” Threaded

Flow/return

connections

for hot water,

high/low

temperature

systems

Gas fitting 1” Threaded

Exhaust flue

duct

Ø110 Socked

Piping in

plastic
material
allowed

Condensate

outlet

50 mm Socked

See

paragraph

4.1.8

4.2 Installation premises

The heating unit must be installed in premises used
exclusively for the latter conforming to standards and
legislation in force and where combustion exhaust
products and combustion air intake is conveyed out of said
premises. Where combustion air is instead taken from the
installation premises then the latter must be equipped with
suitably sized vents conforming to standards.

10

b

The space required to reach the safety and
adjustment devices and to carry out maintenance
must be considered. We recommend leaving a space
of at least 500 mm at the back of the appliance.

b

Ensure that the degree of the heating unit’s electrical
protection is compatible with the characteristics of
the installation premises.

b

Electrical parts must be placed at a height of no less
than 500 mm from the ground where heating units are
supplied with fuel gas with specific weight exceeding
that of air.

b

Heating units may not be installed out in the open
(unless they are not specific outdoor units).

b

The heating unit is equipped with a frost protection
function, useful for installations where the temperature
of the environment could be below 0°C. Gas and
electricity must be supplied for this system to work,
apart from a correctly pressurized water circulation
system and the system must not be in shutdown due
to any type of error.

4.3 System cleaning and water
treatment

It is ABSOLUTELY NECESSARY to treat the water system
for the heating unit to work properly and to guarantee its
service life together with all its components.
This not only applies to jobs carried out on existing
installations but also on new installations.
Sludge, lime-scale and pollutants present in the water can
cause permanent damage to the heating unit, also within
a short time and regardless of the quality standards of the
materials used.

Contact the Technical Assistance Centre for any further
information on type and use of additives.
Chemical-physical characteristics of the water must
conform to the European CSN EN 14868 standard and to
the table given here below:

Initial
filling
water

Regular

service

water (*)

ph 6-8 7,5-9,5
Hardness < 10° < 10° °fH
Electrical

conductivity

< 150

μs/cm

Chlorides < 20 mg/l
Sulphides < 20 mg/l
Nitrides < 20 mg/l
Iron < 0,5 mg/l

(*)

Value of water in circulation system after functioning for

8 weeks.

b

Where softened water is used it is compulsory
to re-check conformity to tolerances for water in
regular service after 8 weeks from topping up and in
particular the electrical conductivity.

b

No controls are required when using de-mineralized
water.

4.4 General instructions

b

An automatic filling system may not be used for
topping up, which must be done manually and
recorded in the unit handbook.

b

If there are more than one boiler, they must all be
put into service either contemporarily or with a very
low rotation time during the initial period of service,
so as to evenly distribute the limited quantity of initial
lime-scale.

b

A flushing cycle must be programmed after the plant
has been installed to flush out any installation debris.

b

Water used for filling or for eventually topping up the
system must always be filtered (synthetic or metal
mesh filters with filtering capacity of no less than
50 micron) to avoid deposits possibly triggering off
under-deposit corrosion.

b

The heating system must be flushed out and cleaned
with good workmanship before filling up the existing
systems. The boiler may not be filled until after the
heating system has been flushed out.

4.5 New heating systems

b

The system must be filled up slowly the first time;
once it is filled and the air expelled it should never
need to be topped up again.

b

The system must be turned to maximum service
temperature during the initial ignition to facilitate
deaeration (a too low temperature prevents the gas
from coming out).

4.6 Upgrading existing systems

Where the boiler has to be replaced it is not recommended
to fill up again if the quality of the water in the existing
systems conforms to specifications. If the quality of water
fails to conform to specifications, we recommend either
re-treating it or separating the systems (the water quality
requirements must be respected in the boiler system).

4.7 Corrosion

Under-deposit corrosion

Under-deposit corrosion is an electrochemical process,
due to the presence of sand, rust, etc., inside the mass
of water. These solid substances generally deposit on the
bottom of the boiler (sludge), on tube and pipe heads or in
the gaps between pipes and tubes.
Micro-corrosion phenomena may be triggered off owing
to the difference in electrochemical potential coming to be
created between the material in contact with the impurity
and the surrounding one.

Corrosion from stray currents

Corrosion from stray currents can occur due to the differing
electrical potentials between water in the boiler and the
metallic mass of the boiler or piping. This process leaves
unmistakeable traces i.e. small regular conical holes.

11

b

It is advisable to connect up the various metal parts
to a good earthing system.

b

The systems must always be separated if oxygen is
either continuously or occasionally introduced into
the installations (e.g. floor heating without pipes in
synthetic material resistant to diffusion, open vessel
systems, frequent topping up).

From what we have seen it is therefore important to avoid two
factors possibly leading to the above mentioned processes
i.e. contact between air and water in the installation and
regular topping up with fresh water.
To eliminate contact between air and water (and to prevent
the latter from becoming oxidized), it is necessary:

- for the expansion system to be a closed vessel type,
correctly scaled and with the correct pre-loading
pressure (to be regularly checked);

- for the installation to always be at a higher pressure
than that of the atmosphere at any point (comprising
the pump suction side) and under all running
conditions (all the water sealing and couplings in the
installation are designed to resist pressure towards
outside, but not for depression);

- that the installation will not be made with materials
permeable to gas (e.g. plastic pipes for floor systems
without anti-oxygen barrier).

a

Please contact the B Technical Assistance Centre
for flushing out the water circuit inside the exchanger.
Do not use incompatible liquid detergents, including
acids (e.g. hydrochloric acid and similar acids) at
any whatsoever concentration.

b

Lastly we would remind you that the warranty does
not cover breakdowns incurred by the boiler due to
deposits and corrosion.

4.8 Positioning and preparation for
installation

When positioning the appliance in the heating system,
account for the fact that water, gas and condensate
drainage connections must be made on the right-hand
side of the cupboard; adequate room must therefore be
left at the sides of the appliance for the space taken up by
parts of the external systems and for mounting the latter, as
shown in Figure 8.

Figure 8

4.9 Condensate outlet

The condensate water produced by

Power Plus Box 1001

a normal running conditions is evacuated into a special
manifold.
Drainage must be done at atmospheric pressure, i.e. by
dripping into a connected drain-trap, as follows:

- install a drip at the condensate drainage manifold;

- connect the drip to the sewerage mains by a drain­trap;

- be ready to use a neutralizer where required (see
project cig E.01.08.929.0; ATV A 115).

There is generally no need to take any special precautions
for draining condensate.
We advise using plastic (PP) piping for building the
condensate drainage.

a

DO NOT for any reason use pipes in copper or in any
other material not specifically used for this particular
scope, as the condensing action could cause rapid
degradation.

Condensate collector

(*) Fill the siphons with water.

(*)

(*)

(at atmospheric pressure)

i > 3%

Civil drain

i

i ≥ 3°

minimum
distance
300 mm

minimum

distance

10 mm

Fig. 9

Furthermore, should the vertical part of the flue exhaust
duct have to be prolonged by more than 4 metres the
condensate drain-trap will have to be placed at the foot of
the piping. The working height of the drain-trap must be at
least 30 cm. The drain-trap outlet must then be connected
up to the sewerage mains.

b

The condensate drain must be connected to the
sewerage mains in such way as to prevent it from
being frozen under any circumstances.

b

Always install a condensate drain in the exhaust flue
duct at no more than 1 m from the boiler

12

4.10 Water circuit

WORKING PRESSURE
The maximum working pressure of the boiler is 6 bar (600
kPa) whilst the minimum is 0.5 bar (50 kPa).

b

It is compulsory to install devices along the topping
up/supply line as well as the water circulation system
to protect the installation from pressures exceeding
550 kPa, in conformity to prescriptions given in the
EN 60335-2-102.

b

Do not expose the exchanger to cyclic changes
in pressure as fatigue stress does a lot of harm to
the system components. Should the water system
suddenly start generating changes in pressure it is
compulsory to use the protection devices to make the
boiler work at a regular pressure.

b

Installation pressure control must be done under cold
conditions.

FILLING UP THE BOILER
The boiler must be filled up by connecting the water from to
the mains to any part of the installation.

b

It is compulsory to use a standard filling device
(EN61770 type) for coupling up to the mains
specifically preventing the back-flow of liquid from
installation to water mains.

EMPTYING THE BOILER
The boiler is emptied through special emptying cocks
installed on the exchanger and water separator.

4.11 Exhaust ue

The exhaust flue duct and fitting to the flue duct must be
made in conformity to standards, legislation in force and to
local rules and regulations.
It is compulsory for ducts to be stiff, resistant to temperature,
condensate, mechanical stress and be sealed.
The flue duct must be as straight as possible, sealed and
insulated.
It must not have any occlusions or narrowing.
Maximum length of the exhaust flue duct (with a diameter of
Ø110 mm) is 55 metres.
Keep in mind that a 90° elbow equals 4 metres of straight
pipe and a 45° elbow one metre of straight pipe.

b

The boiler’s total potential exceeds 35 kW and can
therefore only be installed in premises with air vents
opening towards the outside and made in conformity
to provisions of the law in force (Ministerial Decree
D.M. 12.04.1996).

a

DO NOT for any reason use piping not specifically
designed for this specific scope as the condensing
action could cause rapid degradation.

a

In the event of installation with air intake from the
premises (both in the heating unit and externally)
avoid obstructing the passage of air under the metal
cupboard.

5 INSTALLATION DIAGRAMS

An installation diagram must generally be adapted to the
manufacturing characteristics of the relevant heating unit,
with the purpose of exploiting the boiler potentials to the
full and maintain the entire installation efficient for as long
as possible.
The electronic modulating circulator placed inside the
appliance is only for the primary system and works to keep
the ΔT constant with changes in power modulation. The ΔT
value is set at 20° in the factory and may be altered by
specialized personnel only.
The installation circulators must be scaled to the project
flow capacity and load-loss of said installation only. If the
distribution kits, provided as an accessory, are installed it
will be necessary to check that the technical features of the
low. system circulators and mixer valve are compatible with
the installation.
The Figure 10 shows the water diagram of the unit and
a typical system connectable to the latter, with the three
high, low temperature and hot water systems. Everything
in the large box with dotted lines is in the interior of the
unit. The circulation part in the shaded area is available
as an accessory distribution kit; otherwise it will have to be
installed on the outside of the system.
The Figure 11 shows the accessory distribution kits
installable inside the cupboard.

b

Distribution kits are equipped with shut-off valves.
These must be installed in appropriate places on the
installation.