Ferroli SYS 10-23 Mounting instructions

SYS 10 - 23
wall-hung, gas-fired,
system boiler,
for central heating
INSTALLATION, MAINTENANCE AND USER INSTRUCTIONS
cod. 3544570/2 - 04/2005

2
Sys 10 - 23
This symbol indicates “Warning”
and is placed near all warnings
regarding safety. Such provisions
must be strictly adhered to so as
to avoid danger and damage to
persons and property.
This symbol highlights a note or an
important warning.
Certification
The CE Mark attests that Ferroli gas-fired
appliances conform to the requirements
specified in the corresponding European
directives.
In particular, this appliance conforms to
the following EEC directives:
• Directive 90/396, Gas Appliances,
• Directive 92/42, Efficiency,
• Directive 73/23, Low Voltage, (amended
by no. 93/68)
• Directive 89/336, Electromagnetic
Compatibility (amended by no. 93/68)
IMPORTANT
Your "benchmark" Installation, Commissioning and Service Record Log Book is enclosed in the last
pages of this manual. This record must be completed and left with the end user.
"All CORGI Registered Installers carry a CORGI ID card and have a registration number. Both should
be recorded in your central heating log book. You can check with the CORGI registered by calling
CORGI on 01256 372300".
• Carefully read the warnings in this instruc-
tion booklet, as they provide important
indications on the safety of installation,
operation and maintenance.
• The instruction booklet is an integral and
essential part of the product and must
be kept safely by the user for future
reference.
• If the appliance is sold or transferred to
another owner, or if it is moved, always
check that the booklet accompanies the
boiler for reference by the new owner
and/or installer.
• The installation and maintenance opera-
tionsmustbeperformedaccordingtothe
standards in force, the instructions of the
manufacturer and must be carried out by
professionally qualified personnel.
• Incorrect installation or poor mainte-
nance may cause a damager to persons
orproperty.Themanufacturerdeclinesall
liability for damage deriving from errors
in the installation and maintenance of the
appliance, and where there is a failure to
observe the instructions provided by the
manufacturer.
• Before performing any cleaning or
maintenance operations, disconnect the
appliance from the mains power supply
using the main switched fused spur.
• In the event of faults and/or poor
operation of the appliance, it should be
isolated. Do not attempt to repair the
appliance. Contact professionally quali-
fied personnel only at ferroli caresafe.
• The products must only be repaired-
replaced by professionally qualified
personnel, using original spare parts
only. Failure to heed this warning may
affect the safety of the appliance.
• To ensure the correct operation of the
appliance, annual maintenance must be
performed by qualified personnel.
• This appliance must only be used for
the purposes it has specifically been
designed for. All other uses are consid-
ered improper and thus dangerous.
• After having removed the packaging,
check that the contents are intact.
• The parts of the packaging must not be
left within the reach of children, as they
are potential sources of danger.
• In case of doubt do not use the appliance
and contact your supplier.

3
Sys 10 - 23
1. Operating/user instructions ...................................................................4
1.1 Introduction ............................................................................................................4
1.2 Control panel ..........................................................................................................4
1.3 Ignition and shut-down...........................................................................................5
1.4 Settings ...................................................................................................................5
1.5 Maintenance............................................................................................................5
2. INSTALLATION .......................................................................................6
2.1 General instructions................................................................................................6
2.2 Siting of appliance. .................................................................................................6
2.3 Water connections ..................................................................................................8
2.4 Gas connection .....................................................................................................10
2.5 Electrical connections ...........................................................................................10
2.6 Flues connections .................................................................................................14
3. SERVICE AND MAINTENANCE............................................................20
3.1 Settings .................................................................................................................20
3.2 Commissioning......................................................................................................21
3.3 Maintenance..........................................................................................................22
3.4 Replacement of Parts............................................................................................24
4. CHARACTERISTICS AND TECHNICAL SPECIFICATIONS .....................28
4.1 Dimensions and fittings ........................................................................................28
4.2 Overall view and main components .....................................................................29
4.3 Hydraulic diagram.................................................................................................30
4.4 Technical data table..............................................................................................31
4.5 Diagrams ...............................................................................................................32
4.6 Internal electrical diagrams...................................................................................33
4.7 Fault finding ..........................................................................................................35
BENCHMARK ...........................................................................................36

4
Sys 10 - 23
fig. 1
ABCD
A On /OFF switch
B CH boiler thermostat
C Reset knob with lamp
D Central heating pressure gauge
1. OPERATING/USER INSTRUCTIONS
1.1 Introduction
Dear Customer,
Thank you for having chosen the SYS 10-23, an advanced-concept FERROLI wall-hung boiler featuring
cutting-edge technology, high reliability and constructional quality. Please carefully read this manual
and leave it with the end user.
The SYS 10-23 is a high efficiency heat generator for central heating systems, operating on natural
gas or LPG.
The boiler can be connected to an external hot water cylinder for the production of domestic hot water,
via a “Y” or “S” plan type system.
The boiler body is made up of a copper heat exchanger, the special design of which guarantees high
heat exchange efficiency in all operating conditions, and an atmospheric burner featuring electronic
ignition with ionisation flame control.
The boiler is completely sealed from the surrounding environment: the air required for combustion is
taken in from the outside, and a fan is used to expel the flue gases. The accessories supplied with the
boiler also include a variable-speed pump, expansion vessel, safety valve, air pressure switch, boiler
thermostat, pump overrun and safety thermostat.
The user simply has to set the temperature required inside the home (using the optional, yet recom-
mended room thermostat) or set the system temperature and the required domestic hot water outlet
temperature at the cylinder stat. The regulation and control system will then ensure optimum operation
all year round.
NOTE. External controls not supplied with the boiler.
1.2 Control panel
To access the control panel, open the drop down cover.

5
Sys 10 - 23
1.3 Ignition and shut-down
Ignition
• Open the gas cock of the boiler.
• Purge the gas supply of any air upstream of the gas valve.
• Turn on the main switched spur to the boiler.
• Press the boiler switch to on.
• Rotate the C.H. temperature adjustment knob above Min position.
• At this point, the burner ignites and the boiler starts to function automatically, operated by its control
and safety devices.
If after completing the start-up procedure correctly, the burner fails to ignite and the boiler shut
down warning lights up, wait about 15 seconds then press the reset switch. The reset electronic
control unit will repeat the start-up cycle. If after a second attempt the burners still fails to ignite,
consult the paragraph “Troubleshooting”.
If there is a power failure while the boiler is in operation, the burners automatically go out and
re-ignite when the power returns.
If the system is filled with very cold water, the boiler will automatically light due to the frost ther-
mostat sensing the low temperature. The boiler will not shut down, until the water temperature
reaches 10°C.
Shut-down
Close the gas isolation valve , push the button “A” to OFF and disconnect the appliance from the mains
power supply.
When the boiler power is off the boiler anti-freeze protection is not active.
For extended periods of inactivity during the winter months, and in order to avoid damage due to
freezing, all the water should be drained from the boiler; alternatively, place approved antifreeze
fluid in the central heating system.
1.4 Settings
Setting the ambient temperature (using the optional room thermostat)
Set, using the room thermostat, the temperature required inside the rooms. Based on the demand from
the room thermostat, the boiler is ignited and heats the system water to the set central heating outlet
temperature. When the required temperature inside the rooms is reached, the boiler switches off. A
room thermostat must be used as per the building regulations ‘Part L’ this will maintain the system at
the set central heating outlet temperature and ensure maximum efficiency.
System water pressure control
Using the filling loop and with the system cold top up the water pressure to approximately 1bar. Once
the operation is completed, always close the filling loop. This device is fitted to the system by the installer
on the central heating return pipework.
1.5 Maintenance
It is recommended to have annual service of the appliance performed by qualified personnel. Please
refer to Chap. 3.3 in this manual for further information.
The casing, the control panel and the aesthetic parts of the boiler can be cleaned using a soft and damp
cloth, dipped in soapy water if necessary. Do not use abrasive detergents or solvents.

6
Sys 10 - 23
2. INSTALLATION
2.1 General instructions
This appliance must only be used for the purposes it has been specifically designed for. This appliance is
used to heat water to below boiling temperature at atmospheric pressure and must be connected
to a central heating and/or hot warm distribution system, according to its characteristics, perform-
ance and heating capacity. All other uses are considered improper.
THE BOILER MUST ONLY BE INSTALLED BY SPECIALIST AND QUALIFIED PERSONNEL, IN
COMPLETE COMPLIANCE WITH ALL THE INSTRUCTIONS REPORTED IN THIS TECHNICAL MANUAL,
THE LEGAL STANDARDS IN FORCE, THE PRESCRIPTIONS OF STANDARDS AND ANY LOCAL STAND-
ARDS, AND ACCORDING TO THE RULES OF GOOD PRACTICE.
Incorrect installation may cause injury or damager to persons and property. The manufacturer will not
be held liable in such events.
This appliance must be installed strictly in accordance with these instructions.
The Gas Safety Regulations (Installations & Use).
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland - Consolidated) Regulations.
British gas publication DM2 - Guide for installation in timber framed housing.
British Standards Codes of Practice:
B.S. 7593 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING SYSTEMS
B.S. 5546 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
B.S. 5440 Part 1 FLUES
B.S. 5440 Part 2 AIR SUPPLY
B.S. 5449 FORCED CIRCULATION HOT WATER SYSTEMS
B.S. 6798 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S. 6891 GAS INSTALLATIONS
B.S. 7671 IEE WIRING REGULATIONS
B.S. 4814 SPECIFICATION FOR EXPANSION VESSELS
B.S. 5482 INSTALLATION OF LPG
Model Water Bye Laws
For Northern Ireland the rules in force apply
2.2 Siting of appliance.
The appliance’s combustion chamber is sealed from the surrounding environment and as a result the
appliance may be installed in any room without purpose built ventilation. The installation environment
must nonetheless feature sufficient ventilation, to avoid dangerous conditions arising in the event of
even minor gas leaks. These safety standards are imposed by EEC Directive no. 09/396 for all gas appli-
ances, including the so-called sealed appliances.
The place of installation must in any case be free of dust, inflammable objects or materials and corrosive
gases. The environment must be dry and not prone to freezing.
The boiler is supplied ready for wall-hung installation. The rear frame of the appliance has a series of
slots for fastening it to the wall, using screws with wall plugs. The fastening to the wall must provide
stable and effective support of the appliance.
The boiler must be fastened to a closed part of wall, which is free of apertures or holes behind the frame
of the boiler that may allow the internal components of the boiler to be reached.
If the appliance is enclosed in a cabinet or alongside another appliance, minimum clearances must be
adhered to. Fig. 2 and Tab. 3 show the minimum and recommended space to be left free around the
appliance.

7
Sys 10 - 23
A A
B
D
C
Ø118
66
> *600 mm
Minimum Recommended
A
B
D
30 mm
200 mm
15 mm
(from opening panels)
150 mm
300 mm
C280 mm 300 mm
Table 3
fig. 2
fig. 3
Fixing to the wall
Select suitable mounting position for boiler. Using the template mark flue outlet and boiler mounting
points. Drill two 10mm holes 90mm deep to accept the wall plugs. Fit two special wall plugs in the wall
as described in the fig. 3. Fasten the wall bracket to the wall using an antitheft nut on the right side and
a standard nut (M8) on the left side. Using a core drill cut a 118mm diameter hole for the flue. Mount
the boiler on the wall bracket and fix using an antitheft nut on the left side and a standard nut (M8) on
the right side.
NOTE: M
inimum distance required from front
panel of the appliance for servicing 600mm (D)

8
Sys 10 - 23
Key
1Central heating outlet, 3/4” (22 mm with isolation valve fitted)
2Gas inlet, 1/2” (22 mm with isolation valve fitted)
3Central heating inlet, 3/4” (22 mm with isolation valve fitted)
fig. 4
36 155 155 54
123
2.3 Water connections
The heat capacity of the appliance should be established in advance by calculating the heating require-
ments of the building according to the standards in force. For correct operation and long-life of the
boiler, the hydraulic system must be suitably proportioned and always fitted with all the accessories
that guarantee correct operation.
In the case where the central heating outlet and inlet pipes follow paths whereby, at some points, pockets
of air may form, air vent valves should be installed at such points.
In addition, a drain device should be installed at the lowest point in the system, to allow complete
draining.
If the boiler is installed at a lower level than the system, a flow-return valve should be fitted to prevent
the natural circulation of water in the system.
The temperature differential between the outlet and the inlet of
the boiler should not exceed 20°C. (11°C recommended)
Do not use the water pipes as the earth for electrical
appliances.
Before installation, carefully clean all the pipes in the system to
remove any residues or impurities that may affect the correct
operation of the appliance.
Make the connections to the corresponding fittings, as shown
in fig. 4.
It is essential to fit the supplied isolation valves between the boiler and the central heating system; these
allow the boiler to be isolated from the heating system, if necessary.
The discharge of any safety valves must be routed to outside dicharging to ground level 100 mm
from the floor so as not to create a danger to anyone passing, there should be no rise from the
boiler to outside a slight fall is preffered. The manufacturer of the boiler will not be held liable if
this warning is not heeded. Make the connections to the boiler in a way that its internal pipework
is not subject to stress.

9
Sys 10 - 23
Water treatment
if water treatment is used Ferroli Ltd recommend only the use of Fernox or Sentinel water treatment
products, which must be used in accordance with the manufacturers instructions. For further informa-
tion contact:
Fernox Manufacturing Co. LTD. Sentinel Division
Cookson electronics, forsyth road Betz Dearborn LTD
Sheerwater, working Surrey GU21 5RZ Widnes, Cheshire WA8 5351
Tel. [phone] Tel. [phone]
Note - If the boiler is installed in an existing system any unsuitable additives must be removed by thor-
ough cleansing.
All systems should be cleansed according to B.S. 7593.
Note - In hard water areas treatment to prevent lime scale may be necessary.
Note - It is important that the correct concentration of the water treatment product is maintained in
accordance with the manufactures instructions.
Filling the boiler and the system
The filling pressure, when the system is cold, must be around 1 bar (at least 0.5 bar). If the pressure
drops during operation to a value lower than the minimum described above, the User must restore the
initial value using the filling loop. For correct boiler operation, the pressure, when hot, must be around
1,5-2 bar. Once the operation is completed, always close the filling loop. This device is fitted to the
system by the installer.
Make Up Water
Provision must be made for replacing water lost from the sealed system. Reference should be made
to BS6798, for methods of filling and making up sealed systems. There must be no direct connection
between the boiler's central heating system and the mains water supply. The use of mains water to
charge and pressurise the system directly, is conditional upon the Local Water Byelaws. Again any such
connection must be disconnected after use. The supplied temporary filling loop is shown in fig. 4. Ensure
the filling point is on the return pipe to the boiler.
Attention - is drawn to the Model Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain
water undertakings will not accept their use above ground.
Key
1. Filling point C.H.
2. Temporary connection
3. Cold water supply
4. Double check valve
Fig. 5
3
2
1
4

10
Sys 10 - 23
Fig. 6a Fig. 6b
2.4 Gas connection
Before making the connections, check that the appliance is configured for operation with the
type of fuel available, and carefully clean all the gas pipes in the system, to remove any residues
that may affect the correct operation of the boiler.
The gas connections must be made using the relative coupling (see fig. 4), according to the standards
in force, with a rigid metal pipe, fitting a gas cock between the system and the boiler. Check that all the
gas connections for soundness.
The capacity of the gas meter must be sufficient for the simultaneous use of all the connected appliances.
The diameter of the gas pipe, which leaves the boiler, does not necessarily determine the choice of the
diameter of the pipe used between the appliance and the gas meter; this must be chosen according to
its length and the pressure drop, according to the standards in force.
Do not use the gas pipes as the earth for electrical appliances.
2.5 Electrical connections
Connection to the mains power supply
The boiler should be connected to a single-phase, 230 Volt-50 Hz electrical power supply.
The electrical safety of the appliance is ensured only when the appliance is correctly connected
to an effective earth system, as prescribed by the safety standards in force. Have professionally
qualified personnel check the efficiency and the rating of the earth system. The manufacturer
is not liable for any damage caused by the appliance not being correctly earthed. In addition,
make sure that the electrical system is adequately rated for the maximum power absorbed by
the appliance, indicated on the boiler rating plate, and in particular that the cross-section of the
wires is suitable for the power absorbed by the appliance.
The boiler is pre-wired and fitted with a cable for connection to the electrical line. The connections to
the mains supply must be made using a fixed connection, featuring a double-pole switch with a contact
opening of at least 3 mm. Max 3A fuses must be installed between the boiler and the line. The correct
polarity must be followed (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in the
electrical connections.
The appliance’s power cable must not be replaced by the user. In the event where the cable is
damaged, turn off the appliance and contact professionally qualified personnel to replace it. If
replacing the electrical power cable.
All wiring must conform to current I.E.E. Regulations
Accessing the electrical terminal block
Follow the operation shown in Figs. 6a and 6b to access the electrical terminal block. The layout of
the terminals for the various connections is shown in the wiring diagram, in the chapter on Technical
Specifications.

11
Sys 10 - 23
Central heating request
The heating demand can be done by the room thermostat (terminals 6-7) or by a switch line 230V
phase (terminal 7).
Standard Systems
For a general pipe layout and wiring diagram on the “S” and “Y” plan systems please see fig.
7a, 7b, and 8a, 8b.
SYS “S” Plan
Pipe layout
Wiring diagram
SYS
FERROLI
BOILER
D.H.W.
Zone Valve
A.A.V
C.H.
Zone Valve
Automatic
bypass
(mimimum flow of 6l/min.)
Heating
circuit
7654321
SYS 10-23 Junction Box
NEL
Terminal 7 - SWITCH LINE
12345678910
PROGRAMMER
DHW ON
CH ON
NEUTRAL
LIVE
CH
zone
valve
DHW
zone
valve
Room Thermostat
Cylinder Thermostat
N
E
L
230 Vac
fused at
3 amps
BROWN BLUE
GREY ORANGE
NL
Fig. 7a
Fig. 7b
Remove connection
betwenn terminals 6-7

12
Sys 10 - 23
SYS “Y” Plan
Pipe layout
SYS
FERROLI
BOILER
Auto air vent
Automatic
bypass
(mimimum flow of 6l/min.)
Heating
circuit
Wiring diagram
7654321
SYS 10-23 Junction Box
NL
12345678910
PROGRAMMER
NEUTRAL
LIVE
CH ON
DHW ON
DHW OFF
BLUE
WHITE
GREY
ORANGE
Room Thermostat
Cylinder Thermostat
N
E
L
240 Vac
fused at 3 amps
Honeywell V4073H mid position
The heating system must have an automatic
bypass capable of
passing 6 litres/minute
3 WAY ZONE VALVE
2
1
C
L
Terminal 7 - SWITCH LINE
fig. 8a
fig. 8b
Remove connection
betwenn terminals 6-7

13
Sys 10 - 23
Room thermostat
WARNING: THE ROOM THERMOSTAT MUST HAVE 230V LIVE CONTACTS.
N
L
Switch
external
controls
Switch Line 230V

14
Sys 10 - 23
Ø
Type
60/100
Length up to:
1 bend + 1 metre
1 bend + 3 metres
1 bend + 3 metres
1 bend + 4 metres
1 bend + 5 metres
Restrictor to be used
80/125
Table 4a
50 mm
No restrictor
45 mm
50 mm
No restrictor
Total calculated
flue lenght Use restrictor size
Minimum
0 m
10 m
20 m
35 m
Maximum
10 m
20 m
35 m
45 m
Table 4b
mm
45 m
47 m
50 m
No restrictor
Choice of the restrictors using con-
centric flue
Choice of the restrictors using 2 pipe
system
The Ø45 SYS restrictor is fitted as standard on
the boilers. Before inserting the flue gas outlet
pipe, check that the correct restrictor is installed
(when this needs to be used) and correctly posi-
tioned.
fig. 9a
fig. 9b
2
1
1
N.B: The diameter of the
hole is stamped on
the restrictor
Replacing the restrictor
To install or change the restrictor, remove the fan
unit, remove the flue gas connecting pipe 1 (as
shown in Fig. 9a) and insert the restrictor 2 (as
shown in Fig. 9b).
2.6 Flues connections
This is a “type C” sealed and forced draught appliance, and as such the air inlet and flue gas outlet must
be connected to one of the exhaust/intake systems indicated below. Using the tables and the methods of
calculation described, first verify, before installation, that the flues do not exceed the maximum allowed
length. The standards in force and local legislation must be adhered to for terminal positions.
Restrictors
For the correct operation of the boiler, the restrictors supplied with the appliance must be fitted, accord-
ing to the indications shown in the tables below. These tables apply for both vertical and horizontal
applications.

15
Sys 10 - 23
Ø60/100
telescopic
S 125
* = between 10
and 60 mm
Bend 60/100
1KWMA31Y
DS
L
125
70
50*
Ø60 Ø100
50*
50
115
115
80 -3 mm/m
196
50
115
L70
192 208
Drill the wall 10, 20 mm
greater than the diameter
of the pipe
Slope
downwards
by 3 mm/m
Connection using concentric flue
For side outlet or roof outlet concentric air/flue gas pipe can be connected directly to the top of the
boiler. Numerous accessories are available upon request for the various different installation require-
ments. Please refer to the flue accessories catalogue, or the price list.
fig. 10
Side Outlet
Front view
Rear view
Right hand
L = S + D + 263 mm
Rear hand
L = S + 181 mm
L = Telescopic section
adjustment: max 840mm
min 540mm
Standard flue kit
1KWMA07Y

16
Sys 10 - 23
Sloped tile
1KWMA82U
Concentric
adapter 60/100
1KWMA33K
Max. 4m extension
60/100
1KWMA56U
950
50
max. 4 mt
Roof terminal
1KWMA83U
950
53
50 950
50
1000 125
10
Vertical outlet
fig. 11
Maximum flue lenght permissible
100 mm concentric
125 mm concentric
Vertical Horizontal*
m4m3
m5
Reduction for bend
100 mm concentric bend 90°1 m
100 mm concentric bend 45°0,5 m
125 mm concentric bend 90°0,5 m
125 mm concentric bend 45°0,25 m
* For horizontal Flueing the reduction for appliance
bend or turret are already included.
The total length in linear metres of the concentric
pipes must not exceed the maximum length indicated
in the table below, considering that each bend gives
rise to the reduction indicated. For example, a 60/100
pipe with 1 x 90° bend + 1 metre horizontal + 2 x 45°
bends + 1 metre horizontal, has a total equivalent
length of 4 metres.
For installation (top flue connection):
1. Define the position for the installation of the appli-
ance
2. Drill the wall for the passage of the air/flue gas
pipe according to the references indicated in the
figure, considering that the horizontal sections of
pipe must have a downwards slope of around 3
mm per metre of length, to prevent any rainwater
from entering the boiler.
3. Make a hole that is 10 - 20 mm greater in diameter
than the rated diameter of the concentric pipe used,
to simplify its installation.
4. If necessary, cut the end of the pipes to required
measurement, remembering thatthe outside part of
the pipes must protrude from the wall by between
10 and 60 mm. Eliminate any burrs from the cut.
5. Connect the pipes to the boiler, positioning the
seals correctly.
vertical flueing installation notes
The installation of a concentric vertical flue can be carried out as follows.
Install the appliance as previously mentioned in this manual.
1. Connect onto the flue assembly at the top of the appliance a concentric vertical adaptor part number
1KWMA33K, it is very important to esure the correct size restrictor ring is fitted if required (see page
14 for restrictor ring sizing and equivalent flue leghts).
2. Using the required amount of 1mtr flue extensions (part number 1KWMA56U) inserting them spigot
down ensuring the seals are well lubricated with silicone grease (not supplied) and correctly located
3. If required 45° bends (part number 1KWMA64A) may be used with a resistance value of 0.5mtrs
each, the flue should be routed in such away to avoid any unnecessary devition and thus minimise
the amount of bends required.
4. The termination should be made through our concentric flue outlet (part number 1KWMA83U) in con-
junction with a roof slate pitched (part number 1KWMA82U) flat roof (part number 1KWMA81U).
5. All flue installations must comply with BS5440 part 1 and must only be of Fèrroli manufacture. The
vertical flue must continually rise and be supported throughout its lenght.
The flue must be inspected whilst commissioning the appliance to esure it is sound throughout it
length.

17
Sys 10 - 23
Ref.
1
2
3
4
5
6
N°Pieces
1
10
1
1
1
12
Air bend Ø80 R/D = 0,75
Horizontal air pipe
Air wall terminal
Air inlet closing flange
Flue bend 80 mm R/D = 0,75
Horizontal flue
Description Equivalente
pressure drop
1,5 m
10,0 m
2,0 m
included
2,5 m
24,0 m
45,0 m
Total
Table 6
71Air wall terminal outlet flue 5,0 m
fig. 12
3
2
6 5 1 7
4
Connection using two pipe system
The appliance may be connected to a system of separate air/flue gas pipes with wall or roof outlet,
as shown in drawings 12 to the side. Numerous accessories are available upon request for the various
different installation requirements. The most frequently-used components are shown in Tables 7 - 8 - 9.
Please refer to the flue accessories catalogue or the price list for other components.
To check that the maximum allowed length of the pipes is not exceeded, a simple calculation must be
performed before installation:
1. For each component, Tables 7 - 8 - 9 list a pressure drop in “equivalent air-metres”, depending on the
position of installation of the component itself (air intake or flue gas outlet, vertical or horizontal).
This drop is called “equivalent air-metres” as it relates to the pressure drop of one metre of air intake
pipe (defined as being equal to 1). For example, a 90° bend in a Ø80 flue gas outlet has a pressure
drop equivalent to 2.5 air-metres, that is, equal to 2.5 linear metres of air intake pipe.
2. Once having completely defined the layout of the two pipe flue system, add the pressure drops in
equivalent-metres, according to the position of installation of all the components and accessories in
the system.
3. Check that the total pressure drop calculated is less than or equal to 45 equivalent metres, that is,
the maximum allowable for this model of boiler.

18
Sys 10 - 23
Pipes and fittings reduction table
Air Flue
Vertical Horizontal Vertical Horizontal
Description
Male-female
flue Ø80
Male
-female
bend 45°Ø80
Male-female
bend 90°Ø80
Description
Air terminal of
inlet protection
Ø80
Outlet flue air inlet for
connection with split end
Ø80
1112
1,2 2,2
1,5 2,5
Reduction
2
3
Air Flue
Vertical Horizontal Vertical Horizontal
12
Condensate flue
outlet
A
c
c
e
s
s
o
r
i
e
s
Ø
8
0
A
c
c
e
s
s
o
r
i
e
s
Ø
8
0
Reduction
Airwall terminal
products
of combustion Ø80
5
Table 8
Table 7
The pressure drop values described refer to original Ferroli pipes and accessories.

19
Sys 10 - 23
P
D, E
Q
Q
l
BC
A
G
F
L
J
HH
K
N
N
MM
Q
Flue terminal positions
Fig. 13
Minimum Dimensions of Flue Terminal Positions
Directly below an opening, air brick,
opening windows, etc.
Above an opening, air brick,
opening windows, etc.
Horizontally to an opening, air brick,
opening windows, etc.
Below gutters, soil pipes or drain pipes
Below balconies or car port roof
Below eaves
From a vertical drain pipe or soil pipe
From an internal or external corner
From a surface facing the terminal
From a terminal facing the terminal
From the wall on which the terminal is mounted
From a vertical structure on the roof
Above intersection with roof
Horizontally from a terminal on the same wall
Vertically from a terminal on the same wall
From an opening in the car port (e.g. door,
window) into the dwelling
Above ground roof or balcony level
300mm
300mm
300mm
200mm
75mm
200mm
150mm
100mm
300mm
600mm
300mm
300mm
150mm
1200mm
1200mm
1500mm
N/A
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
NOTE
N/A = Not applicable
Condensing Terminal Positions: If the flue is to be terminated at low level, then the
potential effect of the plume must be considered.
The plume should not be directed: across a frequently used access route
across a neighbouring property
towards a window or door

20
Sys 10 - 23
3. SERVICE AND MAINTENANCE
3.1 Settings
All the adjustment and conversion operations must be performed by Qualified Personnel, such as per-
sonnel from the Local Customer Service Centre.
FERROLI Ltd. declines all liability for damage to property or injury to persons arising from work under-
taken to the appliance by non-authorised persons
Conversion of supply gas
The appliance can operate on Natural Gas or LPG as the supply gas, and is factory configured for use
with one of the two gases, as is clearly marked on the packaging and on the rating plate on the appli-
ance itself. If the appliance has to be used with a gas other than the one it has been set for, the special
conversion kit must be used, as shown below:
1Replace the injectors in the main burner, installing the injectors indicated in technical data table in
Chap. 4.4, according to the type of gas used
2Adjust the minimum and maximum pressures of the burner (ref. corresponding paragraph), setting
the values indicated in technical data table for the type of gas used.
3Change the position of Jumper 02 on the electronic board (ref. corresponding paragraph).
4Apply the adhesive label in the conversion kit next to the rating plate, to confirm the conversion
operation.
Adjusting the gas pressure and heat output
The following adjustments must be carried out by qualified personnel only.
To adjust boiler heat input simply adjust the burner pressure gas via the pressure regulator on the gas
valve (fig. 14).
Adjust the gas pressure at the burner by turning the pressure
regulating screw: turn it clockwise to increase the burner
pressure and anticlockwise to decrease it.
The diagrams indicate the variation in heat output to the
water as burner working pressure is varied (fig. 28).
Adjusting boiler output to the actual requirements of the
central heating system will minimise boiler cycling thus saving
fuel, varying the output has virtually no effect on the efficiency
and combustion characteristics of the boiler.
Adjusting the soft light facility
The appliance has a soft light facility to ensure a quiet igni-
tion sequence.
Measuring the gas pressures during ignition is done via the
outlet test point on the gas valve, the pressure should be
kept to a minimum, but sufficient to ensure correct cross
lighting of the burner.
fig. 14
OUT
I
Inlet
pressure
Test Point
Outlet
pressure
Test Point
Pressure regulator
protection plug
Inlet
gascock
Soft light
adjustment
Natural gaz
Min soft setting 2 mbar
Mid soft setting 4 mbar
Max soft setting 6 mbar
LPG
Min soft setting 5 mbar
Mid soft setting 12 mbar
Max soft setting 20 mbar