Fondital ITACA CTFS 24 Installation and operating instructions

ITACA CTFS
24 - 28 - 32
ITACA RTFS
24 - 28 - 32
InSTAllATIon, uSe And mAInTenAnCe
EN
Translation of the
original instructions (in
Italian)
IST 03 C 688 - 01

2
Dear customers,
Thank You for choosing and buying one of our products. Please read these instructions carefully in order to properly install, operate,
and maintain said equipment.
CAuTIon
• We inform users that:
• Boilers shall be installed by an authorised company possessing the requirements set forth by the prevailing rules and
operating in full compliance with the prevailing standards.
• Anyoneentrustinginstallationtoanunqualiedinstallerwillbesubjecttoadministrativesanctions.
• Anymaintenance(andrepair)workmustonlybecarriedoutbyqualiedpersonnel,possessingtherequirementsset
forth by the prevailing rules.
We hereby inform the customers that certain models, versions and/or accessories relevant to the products this manual
refers to, might not be available in some countries.
Therefore, it is recommended to contact the manufacturer or the importer in order to get the necessary information about
the actual availability of such models, versions and/or accessories.
The manufacturer reserves the right to modify his/her products as deemed necessary, without altering the basic
characteristics of the products themselves.

3
General notes for installing and maintenance technicians, and users
Thisinstructionmanualisanintegralandessentialpartoftheproduct.Itshallbesuppliedbytheinstallertotheuserwhoshallkeepitcarefullyto
consult it whenever necessary.
This document shall be supplied together with the equipment in case the latter is sold or transferred to others.
dAnGeR
This equipment has been manufactured to be connected to a room heating system and to a dHW distribution system.
Any other use shall be considered unsuitable and dangerous for people, animals, and/or property.
The equipment shall be installed in compliance with the prevailing standards and in accordance with the manufacturer's instructions
specied in this manual: the manufacturer will not be held responsible for injuries to people and animals and/or damages to property
resulting from an incorrect installation.
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 release the manufacturer from any and all contractual and extra-contractual liability.
Before installing the boiler, check that the technical data correspond to the requirements for its correct use in the system.
Check that the boiler is intact and it has not been damaged during transport and handling. Do not install equipment which is clearly
damaged and/or faulty.
Do not obstruct the air intake openings.
Only original accessories or optional kits (including the electric ones) are to be installed.
Properly dispose of the packaging as all the materials can be recycled. The packaging must therefore be sent to specic waste
management sites.
After removing the packaging ensure that all packaging materials (staples, plastic bags, styrofoam, etc.) are not left within the reach
of children since they can be a source of danger.
In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualied technicians.
Original parts must be used for all repairs to the boiler.
Non-observance of the above requirements may affect the safety of the boilers and endanger people, animals and/or property.
CAuTIon
Routine boiler maintenance should be performed according to the schedule in the relevant section of this manual.
Appropriate maintenance will keep the boiler working in optimum conditions, ensuring environmental protection and
total safety for persons, animals and/or property.
Incorrect and irregular maintenance can be a source of danger for people, animals and property.
The Manufacturer recommends the user to have the boiler serviced and repaired by a qualied Service Centre. Its staff must be fully
qualied to carry out the above mentioned maintenance operations and possess the requirements set forth by the prevailing rules.
In the event of long periods of inactivity of the boiler, disconnect it from power mains and close the gas cock. If the boiler is
disconnected from the power mains and the gas supply cock is closed the electronic freeze-protection function is not active.
Should there be a risk of freezing, add anti-freeze: it is not advisable to drain the system as this may result in damage; use specic anti-
freeze products suitable for multi-metal heating systems.use specic anti-freeze products suitable for multi-metal heating systems.

4
dAnGeR
Withgasredboilers,takethefollowingmeasuresifyousmellgas:
• do not turn on or off electric switches and do not turn on electric appliances
• Donotigniteamesanddonotsmoke
• Close the main gas cock
• open doors and windows
• ContactaServiceCentre,aqualiedinstallerorthegassupplycompany.
Neveruseaametolocateagasleak.
The boiler is designed for installation in the countries indicated on the technical data plate: installation in any other
country may be a source of danger for people, animals and/or property.
The manufacturer will bear no contractual and tortious liability for failure to comply with all the instructions above.

5
Rapid operating instructions
The following instructions will help you to switch the boiler on quickly and regulate it for immediate use.
CAuTIon
Itispresumedthattheboilerhasbeeninstalledbyaqualiedinstaller,ithasbeencommissionedandisreadytooperate
correctly.
Ifanyaccessorieshavebeenttedontheboiler,theseinstructionswillnotcoverthem.Youwillthereforehavetoreferto
thefullboilerinstructionsaswellastothespecicinstructionsfortheaccessories.
This manual contains full details of how the boiler works, and full operating and safety instructions.
1. Open the gas cock installed ahead of the boiler.
2. Turn the master switch installed ahead of the boiler on; The boiler display turns on.
3. If you do not wish to activate the heating function, press the button until it will display the symbol
: only the DHW function will be enabled.
4. If you wish to activate both the heating and DHW functions, press button until symbol
is displayed.
5. If you do not wish to activate the DHW function, press the "operating mode selection"
button until displaying the symbol : only the CH function will be enabled.
6. Set desired DHW water temperature via DHW +/- buttons +/- dHW.
7. Set desired heating water temperature via +/- CH buttons.
8. Set the desired temperature on the (optional) ambient thermostat in the building. The boiler is now ready
to operate.
If the boiler shuts down, press button
If boiler does not resume its operation after three attempts, contact a qualied Service Centre.

6
1. Instructions for the user ..............................................pag. 9
1.1 Control panel.........................................................................................................................................pag. 9
1.2 Boiler status - LCD Display indications .................................................................................................pag. 12
1.3 Enable/disable "comfort" function..........................................................................................................pag. 14
1.4 Selecting the operating mode................................................................................................................pag. 15
1.5 Adjusting CH and DHW water temperature...........................................................................................pag. 16
1.6 Time setting...........................................................................................................................................pag. 17
1.7 Day temperature and "night temperature" setting.................................................................................pag. 18
1.8 Manual programme setting....................................................................................................................pag. 20
1.9 Automatic programme setting ...............................................................................................................pag. 21
1.10 CH programme mode............................................................................................................................pag. 22
1.11 Parameter display .................................................................................................................................pag. 23
1.12 Failures that cannot be reset.................................................................................................................pag. 24
1.13 Boiler reset............................................................................................................................................pag. 24
1.14 Boiler operation.....................................................................................................................................pag. 25
1.15 Boiler shut-down....................................................................................................................................pag. 28
1.16 Maintenance..........................................................................................................................................pag. 32
1.17 Notes for the user..................................................................................................................................pag. 32
2. Technical features and dimensions......................................pag. 33
2.1 Technical features.................................................................................................................................pag. 33
2.2 Sizes......................................................................................................................................................pag. 35
2.3 Boiler layouts.........................................................................................................................................pag. 36
2.4 Operating data.......................................................................................................................................pag. 38
2.5 General characteristics..........................................................................................................................pag. 39
3. Instructions for the installer............................................pag. 41
3.1 Installation standards ............................................................................................................................pag. 41
3.2 Choosing where to install the boiler ......................................................................................................pag. 42
3.3 Positioning the boiler.............................................................................................................................pag. 42
3.4 Installing the boiler ................................................................................................................................pag. 44
3.5 Flue gas extractor fan............................................................................................................................pag. 44
3.6 Air intake and ue gas venting system..................................................................................................pag. 45
3.7 Checking combustion efciency............................................................................................................pag. 53
3.8 Connection to the gas mains.................................................................................................................pag. 54
3.9 Hydraulic connections...........................................................................................................................pag. 54
3.10 Connection to the electrical mains ........................................................................................................pag. 55
3.11 Connection to ambient thermostat (optional) ........................................................................................pag. 55
3.12 Installation and operation with Open Therm Remote Control (optional) ...............................................pag. 56
3.13 TSP parameters ....................................................................................................................................pag. 59
3.14 Filling the system...................................................................................................................................pag. 63
3.15 Starting up the boiler.............................................................................................................................pag. 64
3.16 Available head.......................................................................................................................................pag. 65
3.17 Wiring diagrams ....................................................................................................................................pag. 66
3.18 Adaptation to other gas types and burner adjustment...........................................................................pag. 77
4. Testing the boiler....................................................pag. 81
4.1 Preliminary checks................................................................................................................................pag. 81
4.2 Switching on and switching off..............................................................................................................pag. 81
5. Maintenance .......................................................pag. 82
5.1 Maintenance schedule ..........................................................................................................................pag. 82
5.2 Combustion analysis.............................................................................................................................pag. 82
6. Troubleshooting ....................................................pag. 83
6.1 Troubleshooting.....................................................................................................................................pag. 83

7
Fig. 1 Control panel ..............................................................................pag. 9
Fig. 2 Model CTFS ller cock .......................................................................pag. 30
Fig. 3 Model RTFS ller cock .......................................................................pag. 30
Fig. 4 Sizes.....................................................................................pag. 35
Fig. 5 Boiler layout ...............................................................................pag. 36
Fig. 6 Boiler layout ...............................................................................pag. 37
Fig. 7 Paper template.............................................................................pag. 43
Fig. 8 coaxial duct kit 0KITCONC00..................................................................pag. 49
Fig. 9 Air intake and ue gas venting via coaxial ducts ...................................................pag. 50
Fig. 10 Dimensions for connection to coaxial air intake/ue gas venting duct ..................................pag. 50
Fig. 11 Split ducts kit 0SDOPPIA11 ..................................................................pag. 51
Fig. 12 Examples of ue gas testing points ............................................................pag. 53
Fig. 13 Connection to the gas mains .................................................................pag. 54
Fig. 14 Thermoregulation curves ....................................................................pag. 58
Fig. 15 Available heads ...........................................................................pag. 65
Fig. 16 Wiring diagram RTFS.......................................................................pag. 66
Fig. 17 Wiring diagram (detail) RTFS................................................................. pag. 67
Fig. 18 Wiring diagram for forced circulation solar system with CH only boiler ................................. pag. 68
Fig. 19 Multifunction relay connecting diagram ......................................................... pag. 68
Fig. 20 Wiring diagram CTFS.......................................................................pag. 69
Fig. 21 Wiring diagram (detail) CTFS................................................................. pag. 70
Fig. 22 Wiring diagram for forced circulation solar system with combi boiler................................... pag. 71
Fig. 23 Multifunction relay connecting diagram ......................................................... pag. 71
Fig. 24 Wiring diagram for natural circulation solar system with combi boiler ..................................pag. 73
Fig. 25 Multifunction relay connecting diagram (Z = neutral; Y = to boiler; Z = to collector)........................ pag. 73
Fig. 26 Relay with remote control and TA2.............................................................pag. 74
Fig. 27 Relay with interface and TA2 .................................................................pag. 74
Fig. 28 Relay with remote request (P17=1) ............................................................pag. 75
Fig. 29 Relay with TA2 request (P17 = 3)..............................................................pag. 75
Fig. 30 Relay with alarm alert (P17 = 0)...............................................................pag. 76
Fig. 31 Front casing opening .......................................................................pag. 77
Fig. 32 Expansion vessel mounting bracket removal.....................................................pag. 77
Fig. 33 Expansion vessel bracket....................................................................pag. 78
Fig. 34 Combustion chamber removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 79
Fig. 35 Gas valve modulation coil....................................................................pag. 80
Fig. 36 Pressure testing point.......................................................................pag. 80
Fig. 37 Gas valve setting ..........................................................................pag. 80

8
Table 1 Parameters displayable with “info” button .......................................................pag. 23
Table 2 CTFS 24 - RTFS 24 adjustment rates ..........................................................pag. 38
Table 3 CTFS 28 - RTFS 28 adjustment rates ..........................................................pag. 38
Table 4 CTFS 32 - RTFS 32 adjustment rates ..........................................................pag. 38
Table 5 General data .............................................................................pag. 39
Table 6 CTFS 24 - RTFS 24 combustion data ..........................................................pag. 40
Table 7 CTFS 28 - RTFS 28 combustion data ..........................................................pag. 40
Table 8 CTFS 32 - RTFS 32 combustion data ..........................................................pag. 40
Table 9 Flue gas venting duct length and diaphragm diameter .............................................pag. 48
Table 10 Flue gas venting duct length and diaphragm diameter ............................................pag. 48
Table 11 Flue gas venting duct length and diaphragm diameter ............................................ pag. 49
Table 12 Flue gas venting duct length and diaphragm diameter ............................................pag. 51
Table 13 Flue gas venting duct length and diaphragm diameter ............................................pag. 52
Table 14 Flue gas venting/air intake duct length and diaphragm diameter .................................... pag. 52
Table 15 Parameters setting........................................................................pag. 76
Table 16 Relationship between "Temperature and Nominal resistance" for temperature probes....................pag. 76
Table 17 P0-TSP0 parameter setting .................................................................pag. 79

9
Instructions for the user
1. Instructions for the user
1.1 Control panel
13
11
10
9
17
16
8
7
6
4
3
1
2
A B C
H eGFd
12
14
15
18
19
20
26
5
21
22
25
23
24
Fig. 1 Control panel
A. Temperature selection (day/night) and information recall.
B. Weekly programme for temperature zones and manual programme selection.
C. Time and ambient temperature setting,
d. DHW temperature setting (+/- dHW).
e. CH water temperature and parameter setting (+/- CH).
F. Alarm reset and back to the starting page during parameter selection.
G. DHW comfort function setting and conrm button
H. Operating mode selection.
To gain access to the interface, touch the display area. Once active, the interface enables all the buttons. 15 seconds after the last
button has been touched, the interface disables all the buttons.

10 Instructions for the user
Ref. SYMBOL STEADY FlASHInG
1Indication of "parameter" inside the
parameter menu Not applicable
2Displaying of the number of
parameters, or of the system pressure,
or of the burner power percentage Not applicable
3Automatic lling procedure is active Not applicable
4Indication of the temperatures
and values of fault and shutdown
parameters Not applicable
5A heating request is present Display of CH temperature set-point
6A DHW request is present Display of DHW temperature set-point
7DHW "Comfort" function enabled Not applicable
8Current temperature (sun = day; moon
= night) Setting of the two temperatures associated with the sun and the moon
9Display of current time/fan revolutions Not applicable
10 This indicates that you are in time slot
programming mode Not applicable
11 Manual mode operation Manual mode setting
12 Display of zone 1 heating programme Edit zone 1 CH programme
13 Current week day Edit day of the week
14 Display of zone 2 heating programme Edit zone 2 CH programme
15 Display of water heater programme Edit water heater programme
16 Night time temperature indication Not applicable
17 Daytime temperature indication All lights ashing: automatic mode
setting
18 Displaying of the ue cleaning function This indicates that you are accessing
the ue cleaning function
19
Instantaneous DHW production and
heating functions enabled Not applicable
20 Not applicable Display of set-point

11
Instructions for the user
Ref. SYMBOL STEADY FlASHInG
21 Indication of the centigrade degrees Not applicable
22 Solar pump or solar valve active Not applicable
23 System pressure measurement unit Not applicable
24 Percentage indication Not applicable
25 During parameter editing, the wrench
symbol stays on until the set datum is
conrmed. Not applicable
26 Lit ame indication Not applicable

12 Instructions for the user
1.2 Boiler status - lCd display indications
1.2.1 normal operation
Boiler switch in OFF mode
Boiler switch in SUMMER or WINTER or CH ONLY mode
No function is enabled.
CH ow temperature and CH system pressure are displayed.
SummeR WInTeR CHONLY
Boiler switch in SUMMER or WINTER mode
DHW function enabled.
DHW temperature is displayed.
(Only for models with DHW production).
SummeR WInTeR
Boiler switch in SUMMER or WINTER mode
CH function enabled.
CH ow temperature is displayed.
WInTeR CHONLY

13
Instructions for the user
Boiler switch in SUMMER or WINTER mode
External water heater active, DHW function active.
DHW temperature is displayed.
(Only for models featuring this function, tted with optional
external water heater).
SummeR WInTeR
1.2.2 malfunction
To identify the malfunction refer to paragraph Troubleshooting on page 83.

14 Instructions for the user
1.3 enable/disable "comfort" function
This function keeps the plate heat exchanger hot, to minimise the waiting time for the production of DHW.When the "comfort" icon
is on, the function is enabled. When it is off the function is disabled and the boiler is in standard DHW operating mode for an instant
boiler.For CH-only models (RTFS) the "comfort" function is not available. The "comfort" icon on the display is always OFF.
If "comfort" function is enabled (“comfort”), press "OK" button to disable it.
If "comfort" function is disabled (“comfort” icon OFF), press "OK" button to enable it.
1. "Comfort" function enabled
2. Press button oK
3. "Comfort" function disabled

15
Instructions for the user
1.4 Selecting the operating mode
Whenever button is pressed, the "SUMMER”, “WINTER” , “CH ONLY”, “OFF” modes are enabled in sequence.
At this stage, all buttons are enabled.
1. Operating mode "OFF"
When the "OFF" mode is enabled, no function is active.
2. Operating mode "SUMMER"
When the "SUMMER" mode is enabled, only the DHW production
function is active.
3. Operating mode "WINTER"
When the "WINTER" mode is enabled, both functions are active: DHW
production.

16 Instructions for the user
4. Operating mode "HEATING ONLY"
When the "CH ONLY" mode is enabled, only the CH water production
function is active.
1.5 AdjustingCHandDHWwatertemperature
Press button +/- dHW to select the desired DHW temperature.
During selection, icon will ash
When the icon is ashing, only the buttons to adjust the water temperature
are enabled.
As soon as button is released, icon will continue ashing for approx. 3
seconds, and temperature value will ash as well.
After this time, value is stored and display standard operation will be
restored.
Press button +/- CH to select the desired ow water temperature.
During selection, icon will ash
When the icon is ashing, only the buttons to adjust the water temperature
are enabled.
As soon as button is released, icon will continue ashing for approx. 3
seconds, and temperature value will ash as well.
After this time, value is stored and display standard operation will be
restored.

17
Instructions for the user
1.6 Time setting
1. To set time, minutes and day of the week, press button .
2. Flashing values can be edited by pressing +/- CH buttons. The rst
editable value is the one relative to the HOUR.
3. Press oK to conrm the edited value and shift to next parameter.
The second editable value is the one relative to the MINUTE.
Flashing values can be edited by pressing +/- CH buttons.
4. Press button to access the day and night setting function
described in the following paragraph.
5. Press oK to conrm the edited value and shift to next parameter.
The third value to set is "DAYS". The day of the week can be selected
by pressing +/- CH buttons.
6. Press oK to conrm the edited value. Press button to quit the
function and go back to starting page.

18 Instructions for the user
1.7 day temperature and "night temperature" setting
When one or more ambient probes are connected to boiler electronic board, two levels of desired ambient temperatures can be set.
Boiler will manage the heating request based on the set temperatures, as follows.
If no ambient probe is connected to the boiler, temperatures cannot be set.
"Day" temperature is identied by the symbol , while "night"
temperature by the symbol .
The "day temperature" is active when bars are on, while "night"
temperature is active when bars are off.
A
B
A Bars "on"
B Bars "off"
1. Press twice to access the "day temperature" setting mode.
2. Press button +/- CH to edit "day temperature" values.

19
Instructions for the user
3. Press oK to conrm the edited values and enter the "night
temperature" setting mode.
4. Press buttons +/- CH to edit "night temperature" values.
5. Press oK to conrm the edited values and leave the setting mode.

20 Instructions for the user
1.8 manual programme setting
The "manual" mode selection indicated with symbol , allows activating the heating function, 24 hours a day, in both zones at the
"day temperature", disabling at the same time zone 1 and zone 2 programming.
External water heater, if there is one, is heated according to the specic programme.
1. Press to access the manual programme setting mode.
2. Press button oK to conrm.
3. Press button to quit the function and go back to starting page,
namely to quit the function.