Ferroli SYS 10-23 Mounting instructions

cod. 3544570/0 - 10/2003
Wall-Hung, Gas-Fired,
System Boiler,
for Central Heating
INSTALLATION,
MAINTENANCE AND USER
INSTRUCTIONS
SYS 10-23

2
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.
• 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 carefully kept 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.
• Incorrectinstallationorpoormaintenance
may cause a damager to persons or
property. The manufacturer declines all
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 system switch and/or the
corresponding on-off devices.
• In the event of faults and/or poor
operation of the appliance, it should be
deactivated. Do not attempt to repair
the appliance. Contact professionally
qualified personnel only.
• 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
purposesithasspecificallybeendesigned
for. All other uses are considered
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.
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 will be enclosed in your
customer information pack. "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".

SYS 10-23
3
1. User/operating instructions....................................................................4
1.1 Introduction.............................................................................................................4
1.2 Control panel ..........................................................................................................5
1.3 Ignition and shut down ...........................................................................................5
1.4 Setting.....................................................................................................................6
1.5 Maintenance............................................................................................................6
2. Installation ..............................................................................................7
2.1 General instructions................................................................................................7
2.2 Place of installation .................................................................................................7
2.3 Water connections ..................................................................................................9
2.4 Gas connection .....................................................................................................11
2.5 Electrical connections ...........................................................................................11
2.6 Flue connections ...................................................................................................14
3. Service and maintenance......................................................................20
3.1 Settings .................................................................................................................20
3.2 Commissioning......................................................................................................21
3.3 Maintenance..........................................................................................................22
3.4 Remplacement 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 Wiring diagram .....................................................................................................33

4
SYS 10-23
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.
The boiler body is made up of a copper heat exchanger, the special shape 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,
temperature sensors and safety thermostat.
The user simply has to set the temperature required inside the home (using the optional, yet
recommended 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.

SYS 10-23
5
1.2 Control panel
To access the control panel, open the drop down cover.
1.3 Ignition and shut-down
Ignition
• Open the gas cock of the boiler.
• Vent air present in the pipe upstream of the gas valve.
• Turn on the switch (if present) or plug upstream of the boiler.
• Turn on the boiler switch
• Rotate the C.H. temperature adjustment knob above Min position.
• Check the external controls are calling for heat.
• At this point, the burner ignites and the boiler starts to function automatically, controlled 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 fail 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 thermostat sensing the low temperature. The boiler will not shut down, until the water
temperature reaches 10°C.
Shut-down
Close the gas isolation valve upstream of the boiler, 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.
fig. 1
ABCD
A On /OFF switch
B CH boiler thermostat
C Rseset knob with lamp
D Central heating pressure gauge

6
SYS 10-23
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 command
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. If no room thermostat is available, the boiler will maintain the system at the
set central heating outlet temperature.
System water pressure control
Manually filling the central heating system with external connection and cock. The filling pressure when
the system is cold, as read on the boiler water pressure gauge, must be around 1.0 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. Once the operation is completed, always close
the filling loop. This device is fitted to the system by the installer.
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.

7
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, performance
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
STANDARDS, AND ACCORDING TO THE RULES OF GOOD PRACTICE.
Incorrect installation may cause 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 Place of installation
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
appliances, 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, space must be allowed
for normal maintenance operations. Fig. 2 and Tab. 3 show the minimum and recommended space
to be left free around the appliance.

8
SYS 10-23
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 wall plugs. Fit two special wall
plugs on 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. 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. Using a core
drill cut a 118mm diameter hole for the flue.
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

9
SYS 10-23
2.3 Water connections
The heat capacity of the appliance should be established in advance by calculating the heating
requirements 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 regular 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.
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.
Key
1Central heating outlet, 3/4”
2Gas inlet, 1/2”
3Central heating inlet, 3/4”
It is recommended to fit 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. The manufacturer
of the boiler will not be held liable if this warning is not heeded, and the discharge valve
intervenes and floods the room.
Make the connections to the boiler in a way that its internal tubing is not subject to stress.
fig. 4
36 155 155 54
123

10
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 information contact:
Fernox Manufacturing Co. LTD. Sentinel Division
Tandern house, Marlowe Way Betz Dearborn LTD
Croydon, surrey, CRO 4YS 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 thorough 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

11
SYS 10-23
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, or a stainless steel flexible continuous-wall pipe, fitting a gas cock between
the system and the boiler. Check that all the gas connections for soudness.
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 line.
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.
Fig. 6a Fig. 6b

12
SYS 10-23
Room thermostat
WARNING: THE ROOM THERMOSTAT MUST HAVE 230V LIVE CONTACTS.
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.)
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

13
SYS 10-23
Tempra 12/18 “Y” Plan
Pipe layout
SYS
FERROLI
BOILER
Auto air vent
Automatic
bypass
(mimimum flow of 6l/min.)
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

14
SYS 10-23
Ø
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 diaphragm 2
(as shown in Fig. 9b).
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
concentric flue
Choice of the restrictors using 2
pipe system
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 operation of the boiler, the restrictors supplied with the appliance must be fitted, according to
the indications shown in the tables below.
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 positioned.
fig. 9a
fig. 9b
2
1
1
N.B.: the diameter of
the hole is
stamped on the
restrictor

15
SYS 10-23
Drill the wall 10, 20 mm
greater than the diameter
of the pipe
Slope
downwards
by 3 mm/m
70
DS50* 125
110
50
L
115
160 240
* = between 10
and 60 mm
Bend 60/100
1KWMR81U
DS
L
125
70
Ø60 Ø100
70 min.
Cut the internal pipe
70 mm longer than “L”
50*
50
115
115
80 -3 mm/m
192 208
Ø60/100
telescopic
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, or a special back flue outlet kit is available for Rear outlet. Numerous accessories are
available upon request for the various different installation requirements. Please refer to the flue
accessories catalogue, or the price list.
fig. 10
Side Outlet
Front view
Top view
Right hand
L = S + D + 263 mm
Left hand
L = S + D + 247 mm

16
SYS 10-23
Sloped tile
1KWMA82U
Concentric
adapter 60/100
1KWMR52A
Max. 4m extension
60/100
1KWMA56U
950
50
max. 4 mt
Roof terminal
1KWMA83U
950
53
50 950
50
1000 125
10
Vertical outlet
For installation (top flue connection):
1. Define the position for the installation of
the appliance
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 coaxial pipe used, to simplify its
installation.
4. If necessary, cut the end of the pipes to
measure, remembering that the 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, placing the
gaskets correctly, and seal the connections to
the wall using the special seal couplings.
fig. 11
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 D= 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.
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.

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
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 double 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.
If the flue system chosen exceeds maximum allowable limit, some sections of the pipes
should be larger in diameter.
3
2
6 5 1 7
4

18
SYS 10-23
Pipes and fittings reduction table
Air Flue
Vertical Horizontal Vertical Horizontal
Description
Male
-fem
ale
flue Ø80
Female
-fem
ale
bend 45°Ø80
Female
-fem
ale
bend 90°Ø80
Male
-fem
ale
bend 90°Ø80
Pipe fitting M/M/F
Ø80
with inspecting
plug+trap for
condensate
drainage
system
Description
Air terminal of
inlet protection
Ø80
Outlet flue air inlet
for concentric system
Ø80
Pipe fitting for outlet flue Ø80
Outlet flue air inlet for
connection with split end
Ø80
1112
1,2 2,2
1,5 2,5
1,5 2,5
7
Reduction
2
4
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
Spigot and socket
reduction Ø80/100
0
Reduction
Airwall terminal
products
of combustion Ø80
5
Male
-fem
ale
flue Ø100
Male-female
bend
45°Ø100
Male-female
bend 90°Ø100
Air wall terminal
products of
combustion
Ø100
Air terminal
of outlet
protection
Ø100
0,4 0,4 0,4 0,8
0,6 1
0,8 1,3
3
1,5
A
c
c
e
s
s
o
r
i
e
s
Ø
1
0
0
Spigot and
socket
reduction
Ø 80/100
1,5 3
Table 8
Table 7
Table 9
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
Aa
Ba
Ca
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
NOTE
N/A = Not applicable
In addition, the terminal should not be nearer than 150mm (fanned draugt) or
300mm (natural draugt) to an opening in the building fabric formed for the purpose
of accommodating a built-in element such as a window frame. Separation distances
are linked to the rated heat inputs as shown.
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
personnel from the Local Customer Service Centre.
FERROLI Ltd. declines all liability for damage to persons and/or things deriving from tampering with
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
appliance 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 nozzles in the main burner, installing the nozzles indicated in technical data table in
Chap. 4.4, according to the type of gas used
2Adjust the minimum and maximum pressures in 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.
fig. 14
OUT
I
Inlet
pressure
Test Point
Outlet
pressure
Test Point
Pressure regulator
protection plug
Inlet
gascock