Fondital CAPRI C Operation instructions

CAPRI C
IST 03 C 201- 01
INSTALLATION, USE
AND MAINTENANCE
GB

Dear Customer,
Thank you for choosing and buying one of our boilers. Please read these instructions carefully in order to
install, operate, and maintain this equipment properly.

This INSTRUCTION MANUAL,
which is an integral and indispen-
sable part of the product, must be
delivered to the user by the installer
and must be kept in a safe place for
future reference. The manual must
accompany the boiler should it be
sold or its possession transferred.
The boiler must be used for the
purposes for which it has been
intended. Any other use shall be
considered incorrect and there-
fore dangerous.
The boiler must be installed in com-
pliance with applicable laws and
standards and according to the
manufacturer’s instructions given
in this manual. Incorrect installation
may cause injury to persons and/or
animals and damage to property.
The manufacturer shall not be held
liable for any such injury and/or
damage.
Damage and/or injury caused by
incorrect installation or use and/or
damage and/or injury due to non-
observance of the manufacturer’s
instructions shall relieve the manu-
facturer from any and all contractual
and/or extra-contractual liability.
Before installing the boiler, check
the technical data to be compatible
with the requirements for its opera-
tion in the system.
Check that the boiler is intact and it
has not been damaged during tran-
sport and handling. Do not install
equipment which is damaged and/
or faulty.
Do not obstruct the air suction and/
or heat dissipation openings.
Only manufacturer-approved acces-
sories and optional kits are to be
installed.
Properly dispose of the packaging
as all the materials can be recycled.
The packaging must therefore be
sent to specific waste management
sites.
Keep the packaging out of the
reach of children as by its nature it
may represent a hazard.
In the event of failure and/or faulty
functioning, switch off the boiler. Do
not attempt to repair it and contact
a qualified service technician.
Manufacturer-approved parts must
be used for all repairs to the boiler.
Non-observance of the above
requirements may affect the safety
of the boiler and endanger people,
animals and property.
The manufacturer recommends
our Customers to have the boiler
serviced by an Authorized Service
Centre.
It is necessary to service the boi-
ler periodically, according to the
schedule indicated in the appli-
cable section of this manual.
Correct maintenance allows for
efficient and correct functioning
of the equipment, granting the
better working conditions, opti-
mizing performance and safety
for people, animals, things and
environment.
In the event of long periods of
inactivity of the boiler, disconnect
it from power mains and close the
gas tap (Warning: the boiler anti-
frost function is disabled).
Should there be a risk of freezing,
add antifreeze: it is not advisable
to empty the system as this may
result in damage; use specific anti-
freezing products suitable for multi-
metal heating systems.
WARNING
This boiler has been built for installation in the country indicated
on the technical data plate: installation in any other country may
be source of danger for people, animals and property.
General informations for installers, service engineers and users

Caution page 2
General information for installers, service engineers and user page 3
1 Instructions for the user page 5
1.1 Control panel page 5
1.2 How the heating unit operates page 6
1.2.1 Start-up page 6
1.2.2 Operation page 6
1.2.3 Unit shutdown page 6
1.2.3.1 Burner shutdown page 7
1.2.3.2 Shutdown due to overheating page 7
1.2.3.3 Shutdown due to low pressure in the system page 7
1.2.3.4 Shutdown due to malfunction of temperature probes page 7
1.3 Maintenance page 7
1.4 Informations for the user page 7
2 Technical features and dimensions page 8
2.1 Technical features page 8
2.2 Dimensions page 9
2.3 Unit scheme page 9
2.4 Unit technical data page 10
2.5 Burner technical data page 10
3 Instructions for the installer page 11
3.1 Installation regulations page 11
3.2 Installation page 11
3.2.1 Packaging page 11
3.2.2 Choose where to install the unit page 11
3.2.3 Installing the unit page 11
3.2.4 Connections to fuel oil mains supply page 11
3.2.5 Ventilation page 11
3.2.6 Air intake and flue gas discharge pipes page 11
3.2.7 Types and classification of air intake and flue gas discharge pipes page 12
3.2.8 Measuring combustion efficency page 13
3.2.9 Connections to power mains page 13
3.2.10 Plumbing connections page 13
3.3 Filling the Central Heating Circuit page 13
3.4 Starting up the unit page 14
3.4.1 Preliminary checks page 14
3.4.2 Switching on and off page 14
3.4.3 Burner regulation page 14
3.5 Plumbing diagram page 13
3.6 Wiring diagram page 14
4 Oil burner page 15
4.1 Description page 15
4.2 Mounting the burner on the heating unit page 15
4.3 Plumbing system page 15
4.4 Regulating combustion page 16
4.5 Removing the nozzles page 16
4.6 Regulating the electrodes page 16
4.7 Replacing the control unit page 17
4.8 Burner ignition page 17
4.9 Wiring diagram page 18
4.10 Burner troubleshooting page 18
5 Testing the heating unit page 19
5.1 Preliminary checks page 19
5.2 Switching on and off page 19
6 Maintenance page 19
6.1 Maintenance schedule page 19
7 Trouble-shooting page 20
INDICE
4

5
1. Signalling light (red): when the red LED is illuminated
this means that the burner is blocked because the flame has
been extinguished.
This blockage is released by actuating the unblocking button
on the burner (fig. 2).
2. Indication light (red): when the light is on, it indicates that
the safety thermostat has shut down the burner. The boiler
will automatically resume operation by resetting the safety
thermostat through button no. 18.
3. Indication light (green): when a fixed green LED is illu-
minated this means that the burner is fed electrically (it does
not signify that the flame is present).
4. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 25°C and 35°C.
When the light is blinking, it indicates that the water pressure
switch has detected insufficient water pressure. When opera-
tional water pressure is restored, the water pressure switch
will resume boiler operation and the led will turn off.
5. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 36°C and 45°C.
When the light is blinking, it indicates that the temperature
probe no. 1(CH flow) is faulty (interrupted or out of range).
The burner is shut down, pumps still operate. As soon as
the probe is replaced, the led will turn off and the boiler will
resume operation.
6. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 46°C and 55°C.
When the light is blinking, it indicates that the connection
between boiler and remote control is interrupted or there are
signal passage difficulties. Once the connection is restored
the light will turn off and the boiler will resume operation.
7. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 56°C and 65°C.
When the light is blinking, it indicates that the temperature
probe no. 2(water tank) is faulty (interrupted or out of range).
The boiler operates in CH and instantaneous DHW supply
mode only. As soon as the probe is replaced, the boiler will
resume operation.
8. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 66°C and 75°C.
9. Indication light (red): when the light is on and fixed, it
indicates that the temperature of the water in the heating
system is between 76°C and 85°C.
When the light is blinking, it indicates that CH water tempe-
rature has exceeded 85°C.
10. Indication light (green): when the light is on and fixed, it
indicates that the boiler is operating in CH mode.
11. Boiler mode selector: this selector allows to choose the
boiler mode (please, refer to paragraphs 1.2.2.).
12. DHW supply knob: the knob allows for DHW supply
mode management.
13. CH water temperature knob: the knob allows for CH
mode management.
14. Water pressure gauge: it shows water pressure in the
heating system.
15. Programmer (optional): the programmer can be set for
CH supply scheduling.
16. Power switch: when the switch is in position I, power is
supplied to the boiler and the switch is lit. When the switch
is in position O, power is not supplied to the boiler and the
switch light is off.
17. Reset button: press the button to restore boiler operation
after shut down due to safety thermostat intervention.
1. INSTRUCTIONS FOR THE USER
1.1 CONTROL PANEL
pic. 1

1.2 Operating the boiler
1.2.1 Switching on
- Open the gas stop cock.
- Turn power mains switch to ON.
- Set boiler power switch no. 17 (pic.1) to ON (the switch lights
up)
- Choose boiler mode through knob no. 11, no. 12 and no. 13 and
the programmable programmer no. 15 (please, refer to 1.2.2.3
and 1.2.2.4 paragraph).
- Adjust room temperature through room thermostat (when available).
- When CH is required, no. 10 light comes on (pic. 1).
- When the burner is on, no. 3light comes on (the light comes on
 whentheamedetectionelectronicsarepowered,thereforeeven
 ifthelightison,amemightstillnotbepresent).
IMPORTANT
the production and maintenance of domestic hot water always
has priority over the central heating function. When there is no
demand for heating the boiler is kept at a temperature of 70 °C
to avoid waitings when requiring DHW.
1.2.2 Operation
SELECTOR (11, pic. 1)
The selector (3 positions) is for setting the operation mode of the
unit:
WINTER: all of the functions are enabled (HEATING, MAIN-
TENANCE, DOMESTIC WATER, ANTI-FREEZE, PUMP ANTI-
BLOCKAGE).
SUMMER: the HEATING function is disabled (the functions
MAINTENANCE, DOMESTIC WATER, ANTI-FREEZE, PUMP ANTI-
BLOCKAGE are enabled).
ANTIFREEZE: the functions ANTI-FREEZE and PUMP ANTI-
BLOCKAGE are enabled.
HEATING
The control card regulates the heating temperature from a value of
50°C to 82°C according to the value set by the operator with the
regulator 13 (pic. 1).
The heating function is requested when the contact of a room ther-
mostat (optional) and the contact of a programming clock (optio-
nal) are closed; such request terminates when one of the contacts
opens or if there is a demand for hot water.
At the end of the heating the heating pump carries out a post-cir-
culation of 180 seconds and then it turns off.
The function HEATING is not enabled when the selector is set to
SUMMER and ANTI-FREEZE.
MAINTENANCE
In the absence of demand for heating and hot water, the control
card will regulate the temperature of the primary at a xed value
of 50°C, in order to speed the response time should there be a
demand for domestic hot water.
The MAINTENANCE function is not enabled when the selector is in
the ANTI-FREEZE position.
DOMESTIC HOT WATER
The domestic hot water function starts when the contact of the
ow sensor closes and terminates when the same contact of the
ow sensor opens.
The control card regulates the temperature of the domestic hot
water from 35°C to 57°C depending on the setting made by the
operator with the regulator 12 (pic. 1).
The DOMESTIC HOT WATER function is disabled when the se-
lector is in the ANTI-FREEZE position.
ANTI-FREEZE
The anti-freeze function is enabled in all of the positions of the
selector:
- when the supply temperature falls below 5°C, the control card
starts up the burner and the heating pump until a supply tempera-
ture of 50°C is reached, or, if the supply temperature of 50°C is not
reached, until reaching a functioning time of 15 minutes;
- when the temperature of the domestic hot water falls below 5°C,
the control card starts the burner and the water pump until the
temperature of 8°C of the water has been reached or, if 8°C are not
reached, until the functioning time of 15 minutes is reached. The
supply temperature in this phase is brought to 50°C.
HEAT ABSORPTION
When the supply temperature exceeds 90°C the pumps come on
to absorb heat. In particular:
- in the SUMMER position the hot water pump runs until the sup-
ply temperature does not fall below 85°C;
- in the WINTER and ANTI-FREEZE position the heating pump will
run until the supply temperature does not fall below 85°C.
PUMP ANTI-BLOCKAGE
Every 24 hours the pumps (heating and domestic hot water) are
activated for 180 seconds to avoid blockage.
ZONE HEATING
Should there be the necessity to heat 2 or 3 zones indepen-
dently at a high temperature, it is possible to connect a zone
card to the boiler (optional) + an interface Open Therm (optio-
nal). It is also possible to manage 1 zone at a high temperature
+ 1 zone at a low temperature (with fluid temperature); in this
case, besides these two cards, it is necessary to utilise the ex-
ternal sensors (optional) to be connected to the zone cards.
6

1.2.3 Boiler shutdown
When the boiler malfunctions, the burner is automatically shu-
tdown.
Please, see the troubleshooting section (paragraph 7. “Trouble-
shooting”) in this manual, for possible shutdown cause detection.
1.2.3.1 Burner shutdown
When there is a burner malfunction, it automatically shuts down
and light 7 comes on, in which case proceed as follows:
- First check there is sufficient fuel by checking that the fuel inter-
ception valve is open and that there is fuel in the network;
- Then unhook the front panel of the boiler by pulling it outwards,
lift it in order to remove it from the boiler itself and unblock the
burner by pressing the lit up red unblocking button (pic. 2); if the
appliance does not start up or blocks again, at the third attempt
contact qualified professionals for servicing.
Do the same if the burner shuts down frequently, as there is
obviously a recurring fault.
1.2.3.2 Shutdown due to overheating
Should the overheating red light 2(pic. 1) come on, signalling the
safety thermostat intervention due to a malfunction, contact an
Authorized Service Centre or qualied personnel for service.
1.2.3.3 Shutdown due to insufficient water pressure
In the event of boiler shutdown due to water pressure switch inter-
vention, no. 4 red light starts blinking, signalling insufcient water
pressure in the CH system.
In order to restore water pressure, proceed as follows (see pic. 4):
- set the general switch 16 (pic. 1) to 0 (the green light turns off);
- unhook the front panel of the boiler by pulling it outwards and lift
it in order to remove it from the boiler itself;
- turn the knob of the loading valve (pic. 2) in an anti-clockwise
direction to let the water into the unit and keep it open until the
manometer (14 pic. 1) indicates that the pressure value of 1÷1,3
bar has been reached; at this stage close the valve by turning the
knob in a clockwise direction and replace the front panel.
WARNING
Only the loading valve should be actuated. Do not touch any
other part of the unit that could scald, such as the heat exchan-
ger or the water pipes.
Once the loading procedure is completed, fully close the inlet
tap. Should the tap not be properly closed, as pressure increa-
ses, boiler CH safety valve may open and water ow out.
Shouldboilerfrequentlyshutdownduetoinsufcientwaterpres-
sure, have it serviced by an Authorized Service Centre or qua-
lied personnel.
1.2.3.4 Shutdown due to malfunction of temperature probes
Should the burner shut down due to malfunctioning of temperatu-
re probes, the following lights turn on and ash:
- red light 5 (pic.1) for probe 1 (CH)
- red light 7 for probe 2 (water tank)
In this instance, contact an Authorized Service Centre or qualied
personnel for service.
1.3 Maintenance
It is necessary to service the boiler periodically, according
to the schedule indicated in the applicable section of this
manual.
Correct maintenance allows for efficient and correct functio-
ning of the equipment, granting the better working conditions,
optimizing performance and safety for people, animals, things
and environment.
The user may only clean the external boiler casing, by means
of commonly marketed household products.
Do not use water!
As provided, the boiler is to be serviced once a year. Correct
maintenance ensures boiler to function efciently, environmentally
friendly, preventing any danger to people, animals or property.
Only qualied personnel are lawfully allowed to service the boiler.
The manufacturer recommends Customers to contact an Authori-
zed Service Centre for maintenance and repairs.
1.4 Information for the user
The user may only access boiler parts that can be reached
without using technical equipment and/or tools: no one, inclu-
ding qualified personnel, is authorized to modify the boiler.
The manufacturer shall not be held responsible for damage to
people, animals, or property, due to tampering with the boiler
or improper intervention.
Should the boiler be left inactive for a long time and power
main supply disconnected, it might be necessary to unlock
the pump.
Pump service therefore only qualified personnel may perform
it.
Pump blockage may be avoided by mixing to water, filming
additives suitable for multi-metal systems.
CH system can be properly protected from frost by using spe-
cific anti-frost additives suitable for multi-metal systems. Do
not use automotive products and verify the additive efficiency
over time.
The boiler is equipped with a thermometer allowing for water
temperature verification.
Reset button
Filling tap
pic. 2
7

2 TECHNICAL CHARACTERISTICS AND DIMENSIONS
2.1 Technical characteristics
This is an heating unit with a cast iron heat exchanger with three
combustion gas passes that operates an oil-fired blown-air burner
and a DHW water tank.
The following models are available:
CTF 23: unit with open combustion chamber and heat output of
24 kW;
CTF 33: unit with open combustion chamber and heat output of
33 kW;
CTFD 23: unit with sealed combustion chamber and halved emis-
sions and heat output of 24 kW;
CTFD 33: unit with sealed combustion chamber and halved emis-
sions and heat output of 33 kW;
The unit meets all of the standards in force in the country of desti-
nation that is indicated on the technical card.
The installation in a different country than the one specified could
be a source of danger to persons, animals and things.
The main technical features of these heating units are given
below:
Manufacture characteristics
- High-efficiency cast-iron heat exchanger with three combustion
gas passes
- Fiberglas insulation with extra thick aluminised kraft (50 mm)
- Oil-fired blown air burner in the balance flue version with built-in
fuel oil pre-heater
- Body in electro-galvanised sheet steel, painted with epoxypolye-
ster powders
- Unit electronic management card
- Heating expansion vessel with 8 litre capacity
- Heating safety valve at 3 bar
- Three speed heating circulator
- Single speed domestic hot water circulator
- Heating system de-aerator
- Copper coil for DHW instantaneous production
- Ready for connection to a programmable timer
- Oil filter
- Heating and hot water temperature sensor
- Domestic hot water priority flow sensor
- Loading valve of heating system
- Heating system drainage valve
- Safety device for water shortage
- Safety thermostat (110°C)
- Predisposition for the connection of a card for the management of
several heating zones (optional kit)
- Predisposition for connection to a Remote Control (optional kit)
- Possibility of connection of an external sensor to the Remote
Control (optional)
Operator interface
- General luminous switch
- SUMMER, WINTER, ANTI-FREEZE selector
- Regulator of the temperature of the heating water
- Regulator of the temperature of the domestic hot water
- LED thermometer
- Manometer
- Lights indicating:
· Power on
· Burner operation
· Heating function activated
· Burner shutdown
· Shutdown due to overheating
· Blockage due to insufficient system pressure
· Blockage due to malfunctioning of the temperature sensor
· Communication error with Remote Control
Operational characteristics
- Anti-freeze function
- Pump anti-blockage function
- Pump post-circulation function
- Heat absorption function
8

9
2.3 Plumbing diagram for the unit
pic. 4
S1 CH PROBE
PR CH PUMP
F PRIORITY FLOW METER
BR BURNER
S2 DHW PROBE
PS DHW PUMP
TS LIMIT THERMOSTAT
TA1 ROOM THERMOSTAT (OPTIONAL)
1FLOW G 3/4 M
2DHW G 1/2 M
3RETURN G 3/4 M
4COLD WATER G 1/2 M
fig. 3
D (mm)
CTF 150
CTFD 120
Air intake
TFD version
Fuel
supply
L (mm)
23 625
33 755
2.2 Dimensions

2.4 Technical data of the heating unit
MODEL 23 33
Class of efficiency
Heat input Qn kW 26.6 36.3
Heat output Pn kW 24.0 33.0
Efficiency at nominal load % 90 91
Efficiency at reduced load (30%) % 89.7 90.7
No. of elements of the cast iron heat exchanger 3 4
CO2 value % 12.5 ÷ 13.0
Flue gas temperature °C 210 190
Bacharach number <1 <1
Flue gas flow rate kg/h 40.0 53.2
Flue gas load loss Pa 13 25
Water capacity l 20 24
Minimum CH water flow rate l/h 680 950
Load loss on the water side (∆T = 10K) Pa 4800 5600
Maintaining loss (∆T = 50K) % 0.5 0.5
CH temperature setting range °C 50 ÷ 82
Maximum CH working pressure bar 3 3
CH expansion vessel capacity l 12 12
DHW temperature setting range °C 35 ÷ 57
Maximum DHW working pressure bar 6 6
DHW supply (∆T = 30K) l/min 11.5 15.8
Power supply V/Hz 230/50
Power supply fuse A 2 2
Height mm 850 850
Width mm 450 450
Depth mm 625 755
Net weight of the heating unit Kg 150 180
10
2.5 Technical data of the burner
MODEL 23 33
Fuel Fuel oil 1.4°E, Hi = 10210 kcal/kg 20°C
Nozzle make Delavan W, Steinen Q, Danfoss S
Type of nozzle Usgal/h 0.55 0.75
Nozzle inclination - 80°B 80°W
Fuel oil setting pressure bar 13.0 12.0
Fuel oil consumption kg/h 2.24 ± 4% 3.06 ± 4%
Pump negative pressure bar >-0.4 >-0.4
Pre-heater W 25 25
Combustion head setting index fixed fixed

11
3.1 Installation regulations
This is a heating unit which must be installed pursuant to applica-
ble standards and laws, which should be taken as incorporated in
full in this manual.
3.2 Installation
3.2.1 Packaging
The unit is packed and delivered in a wooden crate on pallets.
Once the boiler has been removed from its crate, check that it
is intact. The packaging material can be recycled and it must be
disposed of accordingly.
Keep the packaging out of the reach of children as it represen-
ts a choking and suffocation hazard. The manufacturer waives all
liability for injury to persons and animals or damage to property
resulting from non-observance of the above.
The packaging contains:
a) installation, use and maintenance handbook,
b) four screw-adjusting legs,
c) fuel oil lter, hose pipes and ttings for the burner supply.
3.2.2 Choosing where to install the heating unit
When choosing the position of the heating unit please take into
account the following:
- when installing the heating unit in a kitchen (the height of the
boiler is 850 mm, like most kitchen appliances) always provide
the possibility to access it from the upper side, in order to
simplify operations in case it is necessary to replace components
or make repairs;
- avoid installing the heating unit in wet or dusty atmospheres.
3.2.3 Installing the heating unit
Before connecting the boiler to the DHW and CH system pipes,
carefully clean the pipes to remove all traces of metal resulting
from processing and welding operations as well as any oil and
grease which could damage the boiler or jeopardise its operation.
ATTENTION
Do not use solvents which could damage the components.
The producer waives all liability for injury to persons and ani-
mals or damage to property resulting from non-observance of
the above.
After placing the heating unit in the boiler room, please proceed as
follows to install it:
- Remove the front panel.
- Unscrew the two front screws securing the base to the pallet (pic. 7).
- Raise the wooden panel to remove the heating unit as follows:
- insert two ropes or straps from front to rear under the frame
supporting the exchanger body; raise it taking care not to damage
hydraulic parts and lower it to the oor.
- Screw up the two adjustable supporting legs to align and stabilise
the unit.
- Connect the heating unit to the DHW and CH delivery and return
pipes.
- Join the unit to the chimney and to the air intake pipe (for D
versions).
- Connect the burner to the fuel oil supply pipes (see sub-section
3.2.4).
- Connect the unit to the power mains and to the room thermostat,
if any.
3.2.4 Connection to fuel oil mains supply
Refer to subsection 4.3 for the instructions on how to connect the
boiler to the fuel oil supply.
For heating units installed in areas that are particularly cold, use
fuel oil with a low content of parafns.
If necessary, install a supplementary oil pre-heating system.
It is compulsory to install the fuel oil filter included in the supply.
3.2.5 Ventilation
These heating units are designed for connection to a chimney. The
combustion air can be taken:
- directly from the room in which the unit is installed.
- from outdoor using 80mm-dia. pipes (version D, see subsection
3.2.7).
If the combustion air is taken from the room where it is instal-
led, this must comply with applicable standards and laws
which should be taken as incorporated in full in this manual.
3.2.6 Air intake and flue gas discharge pipes
It is mandatory to comply with all applicable standards and laws
relating to the emission of ue gas, which should be taken as in-
corporated in full in this manual.
The ue gas discharge pipes in the heating system have the
following diameter:
- for connections to 150 mm diameter ducts (versions CTF; type
B23);
- for connections to 120 mm diameter ducts (versions CTFD; type
B23; C53; C83).
CTF Version (type B23)
The ue gas pipes in version CTF type B23, must be connected to
a ue made in compliance with all applicable standards and laws,
which should be taken as incorporated in full in this manual.
The ue and gas pipes must comply with the following require-
ments:
- The diameter must not be less than the heat-exchanger
discharge pipe diameter. In the case of ue with a square or
rectangular cross section, the diameter must be 10% more than
the coupling diameter of the heat exchanger.
- The pipes must be made of waterproof material that is resistant
to ue gas temperature and acid condensate.
- They must have low thermal conductivity, good mechanical
resistance, perfect seal and correctly calculated height and cross
section.
- The ue must be positioned vertically with a constant cross
section without any chokes.
- The end section must ensure constant, efcient discharge of ue
gases in any atmospheric condition.
- The end section must project at least 50 cm from any adjacent
structure within a 5 metre radius.
3 INSTRUCTIONS FOR THE INSTALLER

12
Version CTFD (type B23; C53; C83)
The heating unit version CTFD (Types B23, C53 and C83) has a
female tting at the back with an 80 mm lip seal for connecting to
a combustion air intake pipe.
Combustion air must be taken from outside the room in which the
heating unit is installed by means of a suitable pipe.
The maximum length of this pipe is given in the technical data
sheet.
When using bends, remember that a wide radius 90° curve is, in
term of load losses, equivalent to a straight section of pipe 1 metre
long, and a narrow radius 90° curve is equivalent to a straight pipe
1.5 metres long.
When ue gas is discharged through vertical and horizontal pipes
diameter 120 mm, and with through wall discharge, when allowed,
the maximum length of the discharge pipes is shown in the tech-
nical data sheet.
When using bends, remember that a wide radius 90° curve is, in
term of load losses, equivalent to a straight section of pipe 1 metre
long, and a narrow radius 90° curve is equivalent to a straight pipe
1.5 metres long.
IMPORTANT
Only enamelled or stainless steel pipes with trade or The ma-
nufacturer gaskets must be used for flue gas discharge.
With vertical pipes, a special section is required for conden-
sate discharge.
All the installations both versions CTF and CTFD require a
special section in the link to the flue allowing measurement of
the flue gas temperature and CO2 percentage. This is so that
the burner can be set correctly and the combustion efficiency
determined.
IMPORTANT
When running pipes through walls made of flammable mate-
rial, make sure the discharge pipe has suitable thermal insu-
lation (min. 50 mm).
IMPORTANT
When flue gas system is discharged through pipes diameter
125 mm, it is compulsory to install on the air intake pipe an 80
mm diameter terminal similar to those used for the flue gas
discharge of wall-hung boilers.
3.2.7 Types and classification of air intake and flue gas di-
scharge pipes
Type B23
Discharge through the wall (if allowed by the installation standar-
ds) or through the roof or via the boiler ue. The relevant data is
shown on the technical data sheet, which complies with current
standards.
Type C83
Connection to the chimney compatible with type C83.
Type C53
The end sections of the air intake and ue gas discharge pipes
must never be in opposing walls.
Refer to the table in subsection 2.2.
model C23
Max equivalent length of discharge pipe Ø 120 mm: 5 metres
Each added wide radius 90° bend equals 1 metre discharge
Each added narrow radius 90° bend equals 1.5 metre discharge
model C33
Max equivalent length of discharge pipe Ø 120 mm: 4 metres
Each added wide radius 90° bend equals 1 metre discharge
Each added narrow radius 90° bend equals 1.5 metre discharge
model CTFD 23
Max equivalent length
of air intake pipe Ø 80 mm
Max equivalent length
of discharge pipe Ø 120 mm
< 1 m up to 5 m
from 1 to 6 m up to 6 m
from 6 to 7 m up to 7 m
Each added wide radius 90° bend equals 1 metre both air intake and discharge
Each added narrow radius 90° bend equals 1.5 metre both air intake and discharge
model CTFD 33
Max equivalent length
of air intake pipe Ø 80 mm
Max equivalent length
of discharge pipe Ø 120 mm
from 0 to 4 m up to 4 m
from 4 to 6 m up to 6 m
from 6 to 7 m up to 7 m
Each added wide radius 90° bend equals 1 metre both air intake and discharge
Each added narrow radius 90° bend equals 1.5 metre both air intake and discharge

13
3.2.8 Measuring combustion efficiency
Perform the following to determine combustion efciency.
- measure the combustion air temperature.
- measure the temperature of the ue gas and the percentage of
CO2taken through the holes in the ue gas duct.
Take these readings with the heating unit running, after making
sure the Bacharach index is less than 1.
3.2.9 Connecting to the power mains
The heating unit must be connected to a 230V – 50 Hz power
supply.
The power cable must be made of rubber.
Do not use PVC cables, which have low temperature resistan-
ce and tend to deteriorate quickly.
Make sure all the wires are connected correctly.
During installation, comply with the applicable standards
and laws, which should be taken as incorporated in full in
this manual.
A two-pole switch must be tted before the heating unit to allow
maintenance to be carried out in safety. The power line must be
protected by a differential magnetothermal switch with a suitable
breaking capacity.
The mains supply must be properly earthed.
This safety precaution is mandatory. In case of doubt, have
the whole system checked carefully by a qualified electrician.
This safety precaution is mandatory. In case of doubt, have the
whole system checked carefully by a qualied electrician.
The manufacturer can in no way be held liable for damage or
injury caused by failure to earth the system properly. The DHW,
CH and fuel pipes are not suitable for earthing purposes.
3.2.10 Plumbing connections
CENTRAL HEATING
Before installing the heating unit we recommend you clean the sy-
stem to remove any impurities from the various components which
might damage the circulating pumps or the heat exchanger.
The central heating ow and return pipes must be connected
using G 3/4 ttings.
When determining the size of the heating circuit pipes, it is essen-
tial to take into account the load losses induced by the radiators,
any thermostatic valves, radiator cut-off valves and the congura-
tion of the system.
DOMESTIC HOT WATER
The ow and return pipes must be connected to the respective G
1/2” ttings on the heating unit.
The mains pressure must not be more that 6 bar, otherwise a pres-
sure reducer needs to be provided.
The pressure in the DHW circuit should be between 3 and 4 bar.
The hardness of the mains water determines how often the heat
exchanger coil needs to be cleaned.
ATTENTION
- If the water is particularly hard it may be necessary to provide
a domestic water softener with a device for dosing a specific
product for treating drinking water in compliance with the
applicable laws. It is always advisable to treat water with a
hardness of more than 20°F.
- Due to its pH value, water supplied from normal water
softeners may not be compatible with some components of
the heating system.
- The safety valves should be connected to a drain, otherwise
the boiler room may get flooded when they operate.
The manufacturer can in no way be held liable for damage caused
by failure to take these basic safety precautions.
Picture 14 shows the plumbing system diagram of the heating
unit.
3.3. Filling the Central Heating Circuit
When all the connections have been made, the CH circuit can
be lled with water. This must be done carefully in the following
order:
- Open all the radiator air valves and the automatic relief valves on
the heating unit.
- Remove the front panel by pulling and lifting it toward the out-
side.
- Load the boiler by opening the tap anticlockwise (as shown in
pic. 2) to let the water in.
- Close the radiator air valves as soon as water starts to come out.
- Using a gauge, check that the pressure is 1/1.3 bar.
- Turn off the lling tap and open all the radiator air valves again.
- Switch on the heating unit and allow it to heat up, then switch it
off and bleed all the radiators again.
- Allow the system to cool down and check the water pressure is
within the correct range (1/1.3 bar).
WARNING
As far as domestic heating systems treatment of water is
concerned, in order to optimize performance and safety, to
preserve these conditions over time, to ensure long-lasting
regular operation of auxiliary equipment as well, and to
minimize energy consumption, thereby integrating current
laws and standards it is advisable to use specific products
that are suitable for multi-metal plants.

3.4 Starting up the heating unit
3.4.1 Preliminary checks
Before starting up the heating unit carry out the following checks:
- Make sure the ue gas discharge pipe and the air intake pipe are
installed correctly. When the heating unit is switched on, there
must be no leakage of combustion products from any of the
seals.
- Check that the supply voltage is 230 V - 50 Hz.
- Make sure the system is full of water (water pressure 0.8-1 bar);
- Make sure any cut-off valves in the CH and DHW systems are
open.
- Make sure the fuel supply tap is open.
- Switch on the main switch.
- Check that the safety valve is not blocked.
- Check for water leaks.
3.4.2 Switching on and off
For instructions on how to switch the heating unit on and off, refer
to the “User Manual”.
3.4.3 Burner regulation
After starting up the heating unit it is necessary to regulate the
burner setting (see par. 4.4).
3.5 Wiring diagram
14
pic. 5
M: Terminal board for connecion to power mains, room thermostat
M6: Telemetry connections
M1-M24: available connectors
M13: remote / zones connector
TA: room thermostat
FUSE: 2AF 250 VAC fuse
P3: boiler operating mode selector
P2: DHW temperature adjusting potentiometer
P1: CH temperature adjusting potentiometer
TIMER: Timer (optional)
SR: CH probe 10k A 25°C Ohm B =3435
SS: DHW probe 10k A 25°C Ohm B =3435
CM2 ON = temperature holding ON
CM2 OFF = temperature holding OFF

4.1 Description
The heating unit is equipped with a single-stage oil burner bearing
the CE mark and complying with EC Product Directives.
4.2 Mounting the burner on the heating unit
The burner is mounted on the heating unit by means of an alumi-
nium ange and held in position by a projecting screw and nut.
If you need to service burner, unscrew the nut A and remove the
burner (pic. 6)
4.3 Plumbing system
The burner pump can generate a maximum depression of 0.4 bar.
Steam is generated when this value is exceeded.
The oil pipes must be perfectly airtight.
It is mandatory to install a filter on the fuel oil supply pipe.
The burner pump is designed to operate with a twin-pipe system.
If you need to work with a single pipe, unscrew the cap 2 and re-
move the grub screw 3. Afterwards, replace the cap 2 (pic. 17).
IMPORTANT
With twin-tube systems, before starting up the burner make
sure the return pipe is clear. This is because excessive back
pressure would damage the pump.
Picture 18 refers to single-pipe gravity feed.
ATTENTION
In the 2 pipe supply system, before starting the burner, make
sure that the return pipe is not blocked: an excessive pressure
could, in fact, damage the pump.
15
4 OIL BURNER
pic. 6
pic. 7
1. Oil inlet
2. Oil return
3. By-pass grab screw
4. Pressure gauge port
5. Pressure regulator
6. Vacuometer port
7. Solenoid valve reel
8. Auxiliary pressure
gauge port
pic. 8
Di = Inside diameter of pipe
L = Max. length of oil intake port
H = Level difference
L pipe
(m)
H
(m)
ID of
8 mm pipe
ID of
10 mm pipe
0,5 10 20
1 20 40
1,5 40 80
2 60 100
A
H
max 4 m
min 0.1 m

Picture 19 shows a twin-pipe system.
If oil is taken from a tank, the return pipe is must end at the same
height as the uptake pipe.
If the return pipe is above the oil level, a non return valve must be
mounted on the uptake pipe to prevent it from emptying.
The burner performs best when the return pipe is immersed in the oil
Picture 10 refers to a twin-pipe system.
Di = Inside diameter of pipe
L = Max. length of oil intake pipe
H = Level difference
Di = Inside diameter of pipe
L = Max. length of oil intake pipe
H = Level difference
pic. 10pic. 9
4.4 Regulating combustion
When regulating combustion, keep to the CO2, flue gas tempe-
rature, Bacharach index and oil pressure values shown on the
technical data sheet.
The burner combustion head in the unit models 23, 31 and 33 is
the fixed type and does not need regulating.
The combustion air can be regulated by turning the socket screw
A shown in pic. 11. The setting is shown on a graduated scale B.
The oil pressure can be regulated by turning screw 5 in pic. 17.
Refer to the technical data sheet for the value required.
ATTENTION
Each installation has its own settings that cannot be predicted
in advance. This means that the combustion needs to be regu-
lated after the system has been installed.
4.5 Removing the nozzle
Proceed as follows to remove the nozzle:
- Unscrew the two screws V (pic. 12) and remove the burner head.
- Unscrew the screw A (pic. 13) and remove the electrodes.
- Remove the nozzle using one 17 mm and one 16 mm spanner.
4.6 Regulating the electrodes
If the burner is to work efficiently, it is important to keep to the
correct distances between the electrodes and between the nozzle
and the electrodes (pic.13)
pic. 11
ATTENTION
Important A manual or solenoid cut-off valve must be fitted on the oil supply pipe.
The burner hose pipes must be inspected regularly.
16
pic. 12
H
max 4 m
H
max 4 m
H
V
C
A
B

17
4.7 Replacing the control unit
Proceed as follows to replace the burner control unit (pic. 24).
- Unscrew the screw 1, open the lid 2 and disconnect the wires.
- Remove the coil 3.
- Unscrew the two screws 4.
- Move the box slightly and disconnect the high-voltage wires.
pic. 14
pic. 13
4.8 Burner ignition
In the event of shutdown, the red be pressed to reset.
The burner ignition cycle is light 7on the control panel (pic. 25
summarised in the graphs in pic. 1) comes on and the reset button
Con the burner (pic. 11)
12 s 12 s
pic. 15
A
2 ÷ 2.5 mm
4 ± 0.3 mm
3
1
2
4
Thermostat
Pre-heater
Motor
Ignition conversion
Solenoid valve
Flame
Emergency light
Ignition cycle Shutdown due to ignition failure

4.9 Burner wiring diagram
Picture 16 shows the wirin diagrams of the burners.
pic. 16
4.10 Burner troubleshooting
18
MALFUNCTION POSSIBLE CAUSE SOLUTIONS
The burner does not switch on when it
receives a start signal from the root
thermostat
Boiler is not powered on
Check voltage at the terminals
Check the fuse
Check the room thermostat
The photo resistance reads a false light Eliminate the false light
The control unit is connected wrongly Check the terminal connections
The burner implements pre-washing proce-
dure and then shuts down
The photoresistance is dirty Clean it
The photoresistance is faulty Replace it
The flame goes out or does not light
Check the oil pressure
Check that oil flows smootly from the nozzle
Check the air
Check the solenoid valve
Change the nozzle
The burner starts after one failed ignition
The ignition electrodes are wrongly positioned Position electrodes according to instruc-
tions
The air flow is too high Regulate the air flow
The nozzle is dirty or damaged Replace it
The resistor is faulty Replace it
Ignition
electrodes
Flame detector
Solenoid valve
Capacitor
Burner-earth
Safety
thermostat
Limit thermostat Remote lock-out signal
Oil pre-heater

19
5 TESTING THE HEATING UNIT
5.1 Preliminary checks
Before starting up the heating unit, carry out the following checks:
- Make sure the heating unit has been installed in compliance with
legal requirements.
- Make sure the flue gas discharge pipe is installed correctly.
When the heating unit is switched on, there must be no leakage
of combustion products from any of the seals.
- Check that the supply voltage is 230 V - 50 Hz.
- Make sure the system is full of water (water pressure 0.8-1 bar).
- Make sure any cut-off valves in the system are open.
- Make sure there are no oil leaks.
- Switch on the main switch.
- Check that the safety valve is not blocked.
- Check for water leaks.
If the heating unit is not installed in compliance with the relevant
laws and standards, do not attempt to switch it on and inform the
Service Centre.
5.2. Switching on and off
For instructions on how to switch the heating unit on and off, refer
to the “User Manual”.
6 MAINTENANCE
In order to ensure correct and efficient heating unit operation, have it serviced according to the following schedule and complying to the
legal requirements.
Correct maintenance allows for efficient and correct functioning of the equipment, granting the better working conditions, optimizing
performance and safety for people, animals, things and environment.
All maintenance and repairs must be carried out by a properly qualified service engineer.
It is advisable for the heating unit to be serviced and repaired by an authorised Service Centre, which can provide properly trained quali-
fied personnel.
Before carrying out any maintenance involving the replacement of components or cleaning inside the unit, always turn off the main
switch.
6.1 Maintenance schedule
Periodic maintenance covers the following
Checks and Inspections
- Perform a general check and inspection of the heating unit.
- Check the oil supply circuit for leaks.
- Check that the heating unit switches on correctly.
- Check the combustion parameters by means of flue gas analyses.
- Check the condition, state and tightness of the flue gas discharge pipes.
- Check that all the safety devices are intact and operational.
- Check the fittings for water leaks and oxidation.
- Check the efficiency of the safety valve.
- Check the safety thermostat.
- Check the contents of the expansion vessel
Cleaning operations:
- Clean the inside of the heating unit.
- Clean the burner and reset if necessary (see par. 4.4 “Regulating combustion”).
- Clean the ventilation grille in the room in which the unit is installed.
- Clean the heat exchange on the flue gas side.
When repairing or servicing the unit for the fist time, perform the following checks:
- Make sure the room of installation is suitable.
- Check the ventilation openings.
- Check the diameters, length and state of the flue gas discharge pipes .
- Make sure the heating unit is installed according to the instructions in this manual.
If the heating unit does not operate correctly or is likely to cause a hazard for people and animals or damage to property, inform
the Service Centre and fill in the relevant form.

7 TROUBLE-SHOOTING
UNIT STATUS MALFUNCTION POSSIBLE CAUSE SOLUTIONS
The boiler is blocked, the red
blockage light 1 is illuminated.
See paragraph
4.10. “Burner diagnostic”.
See paragraph
4.10. “Burner trouble-shooting”.
See paragraph
4.10. “Burner trouble-shooting”.
The boiler has shut down and
red light no. 2 is on.
Reset by pressing no. 17 button.
Safety thermostat has shut the
boiler down
Water is not owing in the CH
system: pipes are clogged,
thermostatic valves are closed,
intercepting valves in the system
are closed
Check CH system
Pump is blocked or faulty Check the pump
The boiler has shut down and
red light no. 4 is ashing.
Restore correct water pressure Insufcient water pressure
Possible water leaks Check system for leaks
Pressure switch is disconnected Reconnect it
Water pressure switch is faulty Replace it
The boiler has shut down, red
light no. 5 is ashing.
Boiler will automatically resume
operation as soon as the
problem is solved
Flow probe is faulty
Flow probe is disconnected Replace it
Flow probe is faulty Replace it
The boiler has shut down and
red light no. 6 is ashing.
Boiler will automatically resume
operation as soon as the pro-
blem is solved
Boiler communication to and
from remote control is faulty Connecting wire is faulty Check connecting wire
The boiler has shut down, red
light no. 7 is ashing.
Boiler will automatically resume
operation as soon as the pro-
blem is solved
Water tank is faulty
Water tank probe is discon-
nected Reconnect it
Water tank probe is faulty Replace it
The boiler has shut down, red
light no. 9 is ashing (BTN
model only).
Reset by pressing no. 19 button.
Flue gas thermostat is not
consenting to boiler operation
Flue gas thermostat is faulty Check ue gas thermostat ope-
ration: replace when faulty
Air inlet or ue gas discharge
ow is not adequate Replace it
Boiler is not supplying DHW Flow meter is not operating
The system has not sufcient
pressure or ow rate
Check DHW system
Check ow meter lter
Flow meter sensor is faulty or
disconnected Replace or reconnect it
Flow meter is blocked Replace it
20