INSTALLATION, USE AND MAINTENANCE · The boiler must be serviced periodically as indicated in the...

IST

03 C

970

- 04

MINORCAMonothermal

INSTALLATION, USE AND MAINTENANCE

ENTranslation of the original instructions (in Italian)

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Dear Sirs,thank You for choosing and buying one of our products. Please read these instructions carefully in order to properly install, operate, and maintain the product.

WARNING• Boilers shall be installed by an authorised company under the requirements set forth by the prevailing rules, in full

compliance with the prevailing regulations and standards.• Anyone entrusting installation to an unqualified installer will be subject to administrative sanctions.• Boilers must be maintained by qualified personnel only, under the requirements set forth by the prevailing rules.

We hereby inform you 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 the products and/or its components as deemed necessary, in any moment and without prior notice.This instruction manual is available in two languages, Italian and English, without prejudice to the prevalence of Italian language in case of differences in translation and/or dispute on construction of the text.

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General notes for installing and maintenance technicians, and usersThis instruction manual is an integral and essential part of the product. It shall be supplied by the installer to the user who shall keep it carefully to consult it whenever necessary.This document shall be supplied together with the equipment in case the latter is sold or transferred to others.

DANGERThis 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 specified 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 manufactu-rer’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 specific waste ma-nagement sites.After removing the packaging, make sure that its elements (clips, plastic bags, foam polystyrene etc.) are note left within the reach of children as they are potential hazard sources.In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualified 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.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.Children should be supervised to ensure that they do not play with the appliance.

WARNINGThe boiler must be serviced periodically as indicated in the relevant section of this manual.Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.Incorrect and irregular maintenance can be a source of danger for people, animals and property.

The user is strongly advised to have the system serviced and repaired by qualified personnel, satisfying all prevailing law require-ments, and trained to properly carry out these operations.

In the event of long periods of inactivity of the boiler, disconnect it from the electrical power mains and close the gas cock.

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DANGERWith gas fired 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 flames and do not smoke.• Close the main gas cock.• Open doors and windows.• Contact a Service Centre, a qualified installer or the gas supply company.Never use a flame 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.

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1. Instructions for the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.1 Control panel .........................................................................................................................................81.2 Interpreting boiler status from display indications .................................................................................101.3 Boiler operation .....................................................................................................................................111.4 Boiler shut-down ....................................................................................................................................141.5 Maintenance ..........................................................................................................................................151.6 Notes for the user ..................................................................................................................................15

2. Technical features and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162.1 Technical features .................................................................................................................................162.2 Dimensions ............................................................................................................................................182.3 Hydraulic diagram .................................................................................................................................192.4 Operating data .......................................................................................................................................202.5 General characteristics ..........................................................................................................................21

3. Instructions for the installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.1 Installation standards ............................................................................................................................243.2 Choosing where to install the boiler ......................................................................................................243.3 Positioning the boiler .............................................................................................................................243.4 Installing the boiler ................................................................................................................................263.5 Boiler room ventilation ...........................................................................................................................263.6 Air intake and flue gas venting system ..................................................................................................263.7 Checking combustion efficiency ............................................................................................................353.8 Connection to gas mains .......................................................................................................................363.9 Hydraulic connections ...........................................................................................................................363.10 Connection to electrical mains ..............................................................................................................373.11 Connection to ambient thermostat (optional) ........................................................................................383.12 Room temperature installation ..............................................................................................................383.13 Installation of the (optional) external probe and sliding temperature operation ....................................383.14 TSP parameters ....................................................................................................................................403.15 Filling the system ...................................................................................................................................423.16 Starting up the boiler .............................................................................................................................433.17 Available head .......................................................................................................................................433.18 Wiring diagram ......................................................................................................................................443.19 Adaptation to other gas types and burner adjustment...........................................................................46

4. Testing the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.1 Preliminary checks ................................................................................................................................484.2 Switching on and switching off ..............................................................................................................48

5. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.1 Maintenance schedule ..........................................................................................................................495.2 Combustion analysis .............................................................................................................................49

6. Malfunctions, possible causes and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.1 Troubleshooting .....................................................................................................................................50

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Fig. 1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Fig. 2 Filler cock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Fig. 3 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Fig. 4 Hydraulic diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Fig. 5 Paper template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Fig. 6 0KITCONC00 (100/60 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Fig. 7 Dimensions for coaxial pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Fig. 8 0SDOPPIA13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Fig. 9 Dimensions for split pipes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Fig. 10 Air intake and flue gas venting examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Fig. 11 Air intake and flue gas venting example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Fig. 12 Examples of flue gas testing points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Fig. 13 Connection to gas mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Fig. 14 Thermoregulation curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Fig. 15 Available head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Fig. 16 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Fig. 17 SIT 845 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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Tab. 1 Adjustment specifications CTFS 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 2 Adjustment specifications CTFS 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 3 Adjustment specifications CTFS 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 4 Adjustment specifications CTFS 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 5 Adjustment specifications CTFS 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 6 Adjustment specifications CTFS 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Tab. 7 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Tab. 8 Combustion specifications CTFS 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Tab. 9 Combustion specifications CTFS 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Tab. 10 Combustion specifications CTFS 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Tab. 11 Combustion specifications CTFS 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Tab. 12 Combustion specifications CTFS 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Tab. 13 Combustion specifications CTFS 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Tab. 14 Table indicating coaxial pipes 100/60 C12 type - CTFS 9-11-13-15-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Tab. 15 Table indicating coaxial pipes 100/60 C12 type - CTFS 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Tab. 16 Table indicating coaxial pipes 100/60 C32 type - CTFS 9-11-13-15-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Tab. 17 Table indicating coaxial pipes 100/60 C32 type - CTFS 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Tab. 18 Flue gas venting duct length and diaphragm diameter 80+80 - CTFS 9-11-13-15-18 . . . . . . . . . . . . . . . . . . . . . . . 32Tab. 19 Flue gas venting duct length and diaphragm diameter 80+80 - CTFS 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Tab. 20 Limits to be set for TSP parameters and default values in relation to boiler type (TSP0) - I . . . . . . . . . . . . . . . . . . . 40Tab. 21 Limits to be set for TSP parameters and default values in relation to boiler type (TSP0) - II . . . . . . . . . . . . . . . . . . 41Tab. 22 Relationship between "Temperature and Nominal resistance" for temperature probes . . . . . . . . . . . . . . . . . . . . . . 45

Instructions for the user8

1. Instructions for the user

1.1 Control panel

1 3

67

A D

B C

F

8 5

2 4

E

Fig. 1 Control panel

A. Domestic hot water settings (+/- HOT WATER).B. Select operating status and confirm parameters.C. Alarm reset and back to the starting page during parameter selection.D. Domestic heating settings and parameter settings (+/- HEATING).E. LCD display.F. Heating system water pressure gauge.

Instructions for the user 9

Ref. Description Steady on Flashing

1 Parameter indicator Indication of "parameter" inside the para-meter menu. Not used.

2 DHW indicator Boiler is in DHW mode. Displaying of the DHW temperature set-point.

3 Alphanumeric indicator Temperature, parameter values and fault indication. Not used.

4 Central heating indicator Boiler is in heating mode. Displaying of the heating temperature set-point.

5 Parameter editing indicatorDuring parameter editing, the wrench symbol stays on until the set datum is

confirmed.

When edited parameter value is confir-med.

6Flue cleaning function

indicator(for the installer)

Flue cleaning function active. Indicates that you are accessing the flue cleaning function.

7 Flame lighting indicator Lit flame indication. Not used.8 Boiler status indicator DHW and/or heating function active. Not used.


1.2 Interpreting boiler status from display indications

1.2.1 Normal operation

Boiler in STANDBY mode

Boiler in SUMMER modeNo active functionFlow temperature displayed

Boiler in WINTER modeNo active functionFlow temperature displayed

Boiler in CENTRAL HEATING ONLY modeNo active functionFlow temperature displayed

Boiler in SUMMER modeDomestic hot water withdrawalDHW temperature displayed

Boiler in WINTER modeDomestic hot water withdrawalDHW temperature displayed

Boiler in WINTER modeCH function activeFlow temperature displayed

Boiler in CENTRAL HEATING ONLY modeCH function activeFlow temperature displayed

1.2.2 MalfunctionTo identify any malfunctions, refer to paragraph Troubleshooting on page 50.


1.3 Boiler operation

1.3.1 Switching on

DANGERIt is presumed that the boiler has been installed by a qualified installer, it has been commissioned and is ready to operate correctly.

• Open the gas shut-off cock.• Turn the master switch installed ahead of the boiler to ON.• The display turns on and indicates the function currently active (see Interpreting boiler status from display indications on page 10).• Select the boiler operating mode: OFF/SUMMER/WINTER/CH ONLY (see Selecting the operating mode on page 11).• Set desired CH temperature (see CH function on page 11).• Set desired DHW temperature (see DHW function on page 12).• Set the desired room temperature on the ambient thermostat inside the home (if installed).• If the ambient probe or external probe is present, set the desired ambient temperature value.

WARNINGAfter a prolonged period with the boiler not in use, and with LPG fired boilers in particular, some starting difficulty may be encountered.Before starting the boiler switch on another gas powered device (e.g. kitchen range).Beware that even by following this procedure, the boiler might still experience some starting difficulties and shut down once or twice. Press the “RESET” button to restore boiler operation.

1.3.2 Selecting the operating modeTo select the boiler operation mode press B Operating mode selection.Whenever button is pressed, the following modes are enabled in sequence: "SUMMER", "WINTER", "CH ONLY", "OFF"."SUMMER" operating statusWhen the "SUMMER" mode is enabled, only the DHW production function is active."WINTER" operating statusWhen the "WINTER" mode is enabled, both DHW and CH functions are active."CH ONLY" operating statusWhen the "CH ONLY" mode is enabled, only the heating water production function is active."OFF" operating statusWhen the "OFF" mode is enabled, no function is active.

1.3.3 CH functionTo set the water temperature for central heating, press the +/- HEATING buttons.CH temperature may be set within a range from +35°C to +78°C.During temperature setting, the symbol flashes on the screen and the CH current temperature setting is displayed.When the CH system requests heat from the boiler, the LCD displays the CH symbol and the current CH flow water temperature.The waiting time between one boiler ignition and the following one, used to prevent boiler frequent turning on and off, ranges between 0 and 99 minutes (default value: 4 min.), and can be edited with the P3 parameter.Should water temperature in the system fall below set minimum value, between +25° C and +78° C (default value +40°C) to be edited with the P12 parameter, the waiting time is reset and the boiler re-ignites.The burner ON symbol shows while the burner is operating.


1.3.4 DHW functionBoiler electronics always gives priority to DHW over CH supply.To set the domestic hot water temperature, press DHW +/- buttons.The DHW temperature setting range is from +35 °C to +57 °C.

During temperature setting, the symbol flashes on the screen and the DHW current temperature setting is displayed.The burner ON symbol shows while the burner is operating.

1.3.5 Freeze protection functionThis boiler is fitted with a freeze protection system, which works when the following functions are activated: OFF/SUMMER/WINTER/CH ONLY.

DANGERThe freeze protection function only protects the boiler, not the whole heating system.

The central heating system can be effectively protected against icing by using specific anti-freeze products that are suitable for multi-metal systems.

WARNINGDo not use anti-freeze products for car engines, and check the effectiveness of the product used over time.

In case burner cannot be ignited due to the lack of gas, the freeze protection functions are anyway enabled through the circulation pumps.

1.3.5.1 Flow freeze protection functionWhen the heating water temperature sensor detects a water temperature of +5 °C, the boiler switches on and stays on at its minimum heat output until the temperature reaches +30 °C or 15 minutes have elapsed.The pump continues to operate even if the boiler shuts down.

1.3.5.2 DHW plate exchanger freeze protection functionWhen the DHW temperature sensor detects a water temperature of +5°C, the boiler switches on and stays on at its minimum heat output until the DHW temperature reaches +10°C or 15 minutes have elapsed (the deviating valve is in the DHW position).During the DHW freeze protection operation the temperature detected by the flow probe is constantly checked, and in case it reaches +60 °C the burner is switched off.The burner is switched on again if the operation request in anti-freeze mode is still present and the flow temperature is below +60°C.The pump continues to operate even if the boiler shuts down.

1.3.5.3 Ambient probe freeze protection functionIf the ambient probe detects a temperature below +5°C, a heating request to heat the probe-controlled room is launched.The heating function ends when the probe ambient temperature reading reaches +6°C.

1.3.6 Anti-seize functionIf the boiler remains inactive and connected to the power mains, the circulation pump and the deviating valve will be shortly enabled every 24 hours (default time: 10 seconds, that can be changed with parameter P22) so as to avoid any shut-down.

1.3.7 Timed post-circulation functionAfter each central heating, DHW or freeze protection request, the pump continues to be powered for 30 seconds.If a new central heating, DHW or freeze protection request is received during this period, the post-circulation function is cancelled in order to fulfil the request.


1.3.8 Timed post-circulation functionAfter each central heating, DHW or freeze protection request, the fan continues to work for 10 seconds.If a new operating request is received during this period, the post-ventilation function is cancelled in order to fulfil the request.

1.3.9 Operation with ambient probeThe boiler can be connected to sensor for room temperature measurement (supplied as standard).Once the ambient temperature value is known, the boiler automatically regulates the heating water temperature, increasing it as the ambient temperature decreases and decreasing it when the ambient temperature gets close to the set temperature.Heating water temperature varies based on a programme written inside boiler electronic microprocessor.When the ambient probe is connected, the +/- CH buttons are no longer used to set heating water temperature, but to edit ambient temperature.During temperature setting, the °C icon flashes on the display and the value being set is shown.As soon as button is released, icon will continue flashing for approx. 3 seconds, and set value will flash as well.After this time, value is stored and display standard operation will be restored.To connect the ambient probe see Room temperature installation on page 38.

WARNINGOnly original ambient temperature probes supplied by the manufacturer must be used.The use of non-original ambient probes, not supplied by the manufacturer, may affect the operation of the ambient probe itself and of the boiler.

1.3.10 Operation with external probe (optional)Boiler can be connected to a probe measuring the external temperature (optional - not compulsory, supplied by the manufacturer)Once the external temperature value is known, the boiler will automatically adjust the heating water temperature: increasing it as the external temperature decreases and decreasing it as the external temperature increases. This will both improve room comfort and reduce fuel consumption. Standard and reduced range max. temperature values will nevertheless be respected.This boiler operating mode is called "sliding temperature operation".Heating water temperature varies based on a programme written inside boiler electronic microprocessor.With an external sensor, the +/- HEATING buttons no longer set the heating water temperature, and become buttons for changing the theoretical room temperature desired for the rooms to be heated.During temperature setting, the °C symbol flashes on the display and the value being set is shown.For optimal curve adjustment, a position close to +20 °C is recommended.For further details on "cruising temperature operation", refer to paragraph Installation of the (optional) external probe and sliding temperature operation on page 38.

WARNINGOnly original external temperature probes supplied by the manufacturer must be used.The use of non-original external probes, not supplied by the manufacturer, may affect the operation of the external probe itself and of the boiler.


1.4 Boiler shut-downThe boiler shuts down automatically if a malfunction occurs.To determine the possible causes of malfunction, see Troubleshooting on page 50.Below is a list of shut-down types and the procedure to follow in each case.

1.4.1 Burner shut-downFault code E01 is displayed flashing on the display in the event of burner shut-down due to missing flame.If this happens, proceed as follows:• check that the gas cock is open and light a kitchen gas ring for example to check the gas supply;• once having checked if the fuel is available, press the Reset button to restore burner operation: if, after two starting attempts, the

boiler still fails to start and enters the shut-down mode again, contact a service centre or qualified personnel for maintenance.

WARNINGIf the burner shuts down frequently, there is a recurring malfunction, so contact a service centre or a qualified service engineer.

1.4.2 Shut-down due to overheatingFault code E02 is shown on the LCD display in the event of flow water temperature overheating. Contact a service centre or a qualified service engineer to carry out the maintenance.

1.4.3 Shut-down due to incorrect air/flue gas system draughtThe boiler is equipped with a safety device for flue gas exhaustion check.Should an air/flue gas system malfunction occur, the control device will shut-down the boiler by interrupting the gas supply to the boiler and the LCD will display the code:This cut-off can be reset by pressing the Reset button (see Fig. 1 Control panel on page 8).In case of repeated stops, it is necessary to have the boiler and the air intake/flue gas venting ducts checked by a service centre or a qualified service engineer.

1.4.4 Shut-down due to low water pressureFault code E04 is displayed on the LCD display in the event of shut-down triggered by the water pressure switch.Fill the system by working on filler cock (A) (see Fig. 2 Filler cock).Water pressure must be 1÷1.3 bars while the boiler is cold.In order to restore water pressure, proceed as follows:• Turn the filler cock anticlockwise to allow water to enter the boiler;• Keep the filler cock open until the pressure gauge shows a value of 1÷1.3 bar;• Turn cock clockwise to close it.

Should boiler shuts down frequently occur it means there is boiler malfunction in progress. Contact qualified personnel or an autho-rised service centre for maintenance.

DANGERMake sure you close filler cock carefully after filling procedure is completed.If you do not, when the pressure increases, the safety valve may activate and discharge water.

A

Fig. 2 Filler cock


1.4.5 Alarm due to temperature probe malfunctionThe following fault codes are shown on the display in the event of burner shut-down due to a temperature probe fault:• E05 in this case, the boiler does not work.• E06 in this case, the boiler functions in central heating mode only, and the DHW function is disabled.• E15 for the return probe; in this case the boiler functions normally.• E44 for the ambient probe/external probe; in this case the boiler works as usual. The operation with ambient/external probe is

disabled.

WARNINGIn any case, contact a service centre or qualified personnel for maintenance.

1.5 Maintenance

WARNINGThe boiler must be serviced periodically as indicated in the relevant section of this manual.Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.Boilers must be maintained by qualified personnel only, under the requirements set forth by the prevailing rules.

1.6 Notes for the user

WARNINGThe user may only access parts of the boiler that can be reached without using special equipment or tools. The user is not authorised to remove the boiler casing or to operate on any internal parts.No one, including qualified personnel, is authorised to modify the boiler.The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure to follow the above mentioned instructions.If the boiler remains inactive and the power supply is switched off for a long time, it may be necessary to reset the pump.This involves removing the casing and accessing internal parts, so it must only be carried out by suitably qualified per-sonnel.Pump failure can be avoided by adding to the water filming additives suitable for multi-metal systems.

Technical features and dimensions16

2. Technical features and dimensions

2.1 Technical featuresThe boiler is equipped with an integrated gas atmospheric burner. The following models are available:• CTFS sealed chamber, forced draught boiler with electronic ignition for heating and instantaneous DHW supply.• RTN open chamber, natural draught boiler with electronic ignition for heating only.• RBTN natural draught, open chamber boiler with electronic ignition, CH only, with 3-way valve for connection to external water

heater (optional).

The following power rates are available:• CTFS 9: with heat input of 10.4 kW• CTFS 11: with heat input of 12.3 kW• CTFS 13: with heat input of 14.2 kW• CTFS 15: with heat input of 16.4 kW• CTFS 18: with heat input of 20.0 kW• CTFS 24: with heat input of 25.5kW

All models are equipped with electronic ignition and ionisation flame sensing device.The boilers meet local applicable Directives enforced in the country of destination, which are stated on their rating plate.Installation in any other country may be a source of danger for people, animals and property.The key technical features of the boilers are listed below.

2.1.1 Manufacturing characteristics• IPX4D electrically protected control panel.• Integrated, modulating electronic safety board.• Electronic ignition and ionisation flame detection device.• Stainless steel, atmospheric burner that can run on several gases.• Mono-thermal, high performance, aluminium heat exchanger.• Twin shutter modulating gas valve.• CH circulation pump with built-in air purging device.• Safety pressure switch, preventing low water pressure operation.• Air pressure switch• Integrated, automatic by-pass.• 6 litre expansion vessel.• System filler cock.• System water discharge tap.• Heating flow water temperature probe.• Heating return water temperature probe.• Domestic hot water temperature probe.• Heating flow safety thermostat.• Stainless steel plate heat exchanger for DHW production.• Motorised deviating valve.• DHW priority flow switch.• 8 litre/min DHW flow-limiting device.

2.1.2 User interface• Liquid crystal LCD interface showing the boiler operating status: OFF, SUMMER, WINTER and CH ONLY.• CH water temperature setting buttons: 35-78 °C.• DHW temperature setting buttons: 35-57 °C.• System water pressure gauge.

Technical features and dimensions 17

2.1.3 Operating features• Electronic flame modulation in CH mode, with timed rising ramp.• Electronic flame modulation in DHW mode.• Flow freeze protection function: ON 5°C; OFF 30°C or after 15 minutes of operation if CH temperature > 5 °C.• DHW freeze protection function (CTFS): ON 5°C; OFF 10 °C or after 15 minutes of operation if DHW temperature > 5 °C.• Timer-controlled flue cleaning function: 15 minutes.• CH Maximum heat input parameter adjustment.• Ignition heat input adjustment parameter.• Ignition flame propagation function.• CH thermostat timer: 4 minutes (adjustable).• Heating pump post-circulation function in CH, freeze protection and flue cleaning modes: 30 seconds (adjustable).• DHW post-circulation function: 30 seconds.• Post-circulation function for heating temperature > 78 °C: 30 seconds.• Post-ventilation function after working: 10 seconds.• Post-ventilation function for heating temperature > 95°C.• Circulation pump and deviating valve anti shut-down function: 10 seconds of operation after 24 hours of inactivity.• Ready for connection to an (optional) ambient thermostat.• Ready for operation with an ambient probe (optional, supplied by the manufacturer).• Ready for operation with an external probe (optional, supplied by the manufacturer).• Anti-water hammer function: can be set from 0 to 10 seconds.• DHW function priority.


2.2 Dimensions

400 250

700

200107,5

134

60

66 60 62 67 82 63

114

31

9181

M

C G F

R

Fig. 3 Dimensions

M CH system flow (3/4”)C DHW outlet (1/2")G Gas inlet (1/2”)F Cold water inlet (1/2")R CH system return (3/4”)


2.3 Hydraulic diagram

M C G

8765

4

3

2

1

9

10

11

12

19

14

15

F R

13

18

21

16

20

24

22

25

26

23

17

Fig. 4 Hydraulic diagram

M CH system flowC DHW outletG Gas inletF Cold water inletR CH system return

1. Automatic by-pass2. DHW temperature probe3. Motorised 3-way valve4. Modulating gas valve5. Safety thermostat on CH flow6. CH flow water probe7. Burner8. Ignition/detection electrode9. Mono-thermal heat exchanger10. Sealed combustion chamber11. Flue gas extraction fan12. Flue gas circuit safety pressure switch13. Pressure testing point on flue gas duct

14. Air intake and flue gas venting duct15. Pressure testing point on flue gas duct16. Expansion vessel17. CH return water temperature probe18. 3-bar safety valve19. System unloading cock.20. Minimum pressure switch21. Air-purging device22. Circulation pump23. 8 l/min flow-limiting device24. Filler cock25. Cold water flow switch with filter26. Secondary plate exchanger


2.4 Operating dataBurner pressures reported in the following page must be verified after the boiler has been operating for 3 minutes.

Gas category: II2H3+

Fuel Gas mains pressu-re [mbar] Nozzle [mm] Min pressure at

the burner [mbar]

Max pressure at the burner

Heating [mbar]


DHW [mbar]Natural gas G20 20 1,20 1,5 3.2 11,1Butane gas G30 29 0,70 3,9 8.1 28,3Propane Gas G31 37 0,70 5,1 10,7 35,9

Tab. 1 Adjustment specifications CTFS 9


the burner [mbar]


Heating [mbar]





the burner [mbar]


Heating [mbar]





the burner [mbar]


Heating [mbar]





the burner [mbar]


Heating [mbar]


DHW [mbar]Natural gas G20 20 1,20 1,5 10,9 11,1Butane gas G30 29 0,70 3,9 27,6 28,3Propane Gas G31 37 0,70 5,1 35,9 35,9



the burner [mbar]


Heating [mbar]


DHW [mbar]Natural gas G20 20 1,35 2,5 11,4 11,4Butane gas G30 29 0,78 6,1 28,4 28,4Propane Gas G31 37 0,78 8,0 36,4 36,4



2.5 General characteristics

Description um CTFS 9 CTFS 11 CTFS 13 CTFS 15 CTFS 18 CTFS 24Burner nozzles no. 11 11 11 11 11 11Nominal heat input kW 10,4 12,3 14,2 16,4 20,0 25,5Minimum heat input kW 7,0 7,0 7,0 7,0 7,0 11,5Max heat output kW 9,3 11,1 13,0 15,1 18,6 23,3Minimum heat output kW 6,0 6,0 6,0 6,0 6,0 9,9Minimum CH system pressure bar 0,5 0,5 0,5 0,5 0,5 0,5Maximum CH system pressure bar 3,0 3,0 3,0 3,0 3,0 3,0DHW nominal heat input kW 20,0 20,0 20,0 20,0 20,0 25,5DHW minimum heat input kW 7,0 7,0 7,0 7,0 7,0 11,5DHW circuit min. pressure bar 0,5 0,5 0,5 0,5 0,5 0,5DHW circuit max. pressure bar 6,0 6,0 6,0 6,0 6,0 6,0DHW specific flow rate (ΔT=25K) l/min 11,4 11,4 11,4 11,4 11,4 14,0DHW specific flow rate (Δt=30K) l/min 9,5 9,5 9,5 9,5 9,5 11,7Electric power supply – voltage / frequency V - Hz 230 - 50 230 - 50 230 - 50 230 - 50 230 - 50 230 - 50Power mains supply fuse A 3,15 3,15 3,15 3,15 3,15 3,15Maximum power consumption W 120 120 120 120 120 120Pump absorption W 84 84 84 84 84 84Electric protection rating IP X4D X4D X4D X4D X4D X4DNatural gas consumption at maximum CH output (Value referred to 15 °C - 1013 mbar) cu. m/h 1,10 1,30 1,50 1,74 2,12 2,70

Butane gas consumption at maximum CH output kg/h 0,82 0,97 1,12 1,29 1,58 2,01Propane gas consumption at maximum CH output kg/h 0,81 0,96 1,10 1,27 1,55 1,98Maximum CH working temperature °C 83 83 83 83 83 83Maximum DHW working temperature °C 62 62 62 62 62 62Total capacity of expansion vessel l 6 6 6 6 6 6Maximum recommended system capacity (Maximum water temperature 83°C, expansion vessel pressure 1 bar)

l 100 100 100 100 100 100

Tab. 7 General specifications

Description um Max. output Min. output 30% loadHeat loss from the boiler casing % 1,59 2,55 -Flue system heat loss with burner on % 9,05 11,85 -Flue system mass capacity g/s 11,5 12,1 -Flue temp. – air temp. °C 101,3 63,9 -Absolute flue gas temperature upon safety thermostat triggering °C 143

CO2 value (methane/butane/propane) % 3.3 / 3.9 / 3.8 2.1 / 2.5 / 2.5 -Maximum heat output efficiency rating % 89,2 85,6 86,2NOx emission class - 3

Tab. 8 Combustion specifications CTFS 9



CO2 value (methane/butane/propane) % 6,7 / 7,9 / 7,7 2,7 / 3,2 / 3,1 -Maximum heat output efficiency rating % 91,2 85,9 87,4NOx emission class - 3


Instructions for the installer24

3. Instructions for the installer

3.1 Installation standardsThis boiler must be installed in compliance with the laws and standards in force in the country of installation, which are herein consi-dered as entirely transcribed.To find out about the gas category and technical specifications, refer to operation data and general features specified in the previous pages.

DANGERAccessories and spare parts for installation and service procedures are to be supplied by the Manufacturer.Should non original accessories and spare parts be employed, boiler proper performance is not guaranteed.

3.1.1 PackagingBoiler is shipped in a sturdy cardboard box.Remove boiler from cardboard box and check its integrity.The packing materials can be recycled. Disposal must be managed via appropriate waste collection sites.Keep packaging out of reach of children, as it may be dangerous.The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure to follow the above mentioned instructions.Packaging includes one plastic bag containing:• boiler installation, use and maintenance manual;• the template for mounting the boiler on a wall (see Fig. 5 Paper template).• a room temperature sensor;• 2 screws and relevant wall blocks for fixing the boiler to the wall;• 5 diaphragms for flue gas venting: diameters of 38, 40, 41, 42 and 47 mm (CTFS 9, 11, 13, 15, 18);• 3 diaphragms for flue gas venting: diameters 43, 47 and 49 mm (CTFS 24);

3.2 Choosing where to install the boilerThe following must be taken into account when choosing where to install the boiler:• indications contained in paragraph Air intake and flue gas venting system on page 26 and its sub-paragraphs.• check the wall for sturdiness, avoiding weak areas.• do not install the boiler over appliances which may affect boiler operation (e.g. cookers, which produce steam and grease, washing

machines etc.).• do not install boilers in locations with a corrosive or very dusty atmosphere, such as hairdresser salons, laundries etc., as this may

severely reduce the lifespan of the components of the boiler.• avoid installing the air intake terminal in rooms or areas with corrosive or very dusty atmosphere to protect the heat exchanger.

3.3 Positioning the boilerEach boiler is supplied with a paper template, found inside the packaging (see Fig. 5 Paper template).The template allows you to ensure that the pipes connected to the CH system, the DHW system and the gas mains, and the air intake/flue gas venting ducts are all laid out correctly during the realisation of the water system and before installation of the boiler.This template is made of heavy-duty paper and must be fixed, with the help of a level, onto the wall where the boiler is to be mounted.The template provides all the indications required to drill the boiler mounting holes to the wall, procedure which is done using two screws and wall blocks.The lower area of the template shows where to mark the exact point at which the couplings are to be positioned for boiler connection to the gas supply pipe, cold water mains supply pipe, hot water outlet, CH flow and return pipes.The upper area of the template shows where air intake and flue gas ducts are to be positioned.

Instructions for the installer 25

DANGERSince the temperature of the walls on which the boiler is mounted and external temperature of coaxial air/flue gas system do not exceed 60°C, no minimum distance from flammable walls is to be accounted for.For boilers with split air intake and flue gas venting ducts, in the case of proximity with flammable walls and passages through walls, apply insulating material between the wall and the flue gas venting duct.

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naturaleTiro

naturalTiragenaturel

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visszatérő csatlakozás

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�� Gasingang Gas(Gaseinlass) Gas inlet Είσοδος

αερίου Racord gaz Přívod plynu Gázcsat-alkozás Gaz

0DIMACAR24

Fig. 5 Paper template


3.4 Installing the boiler

DANGERBefore connecting the boiler to CH and DHW networks, clean the pipes carefully.Before commissioning a NEW system, clean it to remove any metal chips due to machining and welding, and any oil and grease that might negatively affect boiler operation or even damage it in case they get inside it.Before commissioning a RECONDITIONED system (where radiators have been added, the boiler has been replaced, etc.) thoroughly clean it to remove any sludge and residues.Clean the system using standard non acid products, available on the market.Do not use solvents as they could damage system components.Furthermore, in the central heating system (either new or reconditioned), it is always advisable to add to water a suitable percentage of corrosion protectants for multi-metal systems that will create a protective film onto all internal surfaces.The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure to follow the above mentioned instructions.

In order to install the boiler proceed as follows:• Affix the template to the wall.• Check that 1 cm to the right and 1 cm to the left of the boiler is left for casing removal;• Drill two 12 mm diameter holes in the wall for the wall plugs, insert the wall plugs supplied with the boiler and apply and tighten

the screws;• If necessary, provide holes in the wall to allow air intake and/or flue gas venting pipes to pass through it;• Position the connections for the gas mains pipe G, the cold water inlet pipe F, the hot water outlet pipe C, and the central heating

flow M and return pipes R as indicated at the bottom of the template;• Hook the boiler to the previously fitted screws;• Connect the boiler to the feed pipes (see Hydraulic connections on page 36);• Connect the boiler to the air intake and flue gas venting system (see Air intake and flue gas venting system on page 26);• Connect power supply, ambient thermostat (when available) and other available accessories (refer to the following paragraphs).

3.5 Boiler room ventilationThe boiler has sealed combustion chamber. Combustion air is not drawn from boiler room, therefore no specific recommendations need to be applied concerning the boiler room or openings and ventilation provided to the boiler room.

DANGERthe boiler must be installed in a room that is compliant with the legislation and standards in force in the country of instal-lation, which are herein considered as entirely transcribed.

3.6 Air intake and flue gas venting systemFlue gas discharge into the atmosphere and air intake/flue gas venting systems must comply with applicable laws and standards in the country of installation that are considered as fully transcribed herein.When positioning the boiler exhaust terminals onto the wall, comply with the distances specified in the applicable standards and re-gulations in force in the Country of installation, which are herein considered as entirely transcribed.


DANGERThe boiler is equipped with a safety device for flue gas exhaustion check.It is strictly forbidden to tamper with and/or prevent operation of such safety device.Should an air/flue gas system malfunction occur, the device will shut-down the boiler by interrupting the gas supply to the boiler and the LCD will display the E03 code.In this case it is necessary to have safety device, boiler and the air intake/flue gas venting ducts promptly checked by a service centre or a qualified service engineer.In case of repeated stops, it is necessary to have safety device, boiler and the air intake/flue gas venting ducts checked by a service centre or a qualified service engineer.After each operation on the safety device or the air suction/flue gas exhaust system, it is necessary to perform a functio-nal test of the boiler.In case it is necessary to replace the safety device use only original spare parts supplied by the Manufacturer.To reset the combustion gas exhaust control device operation it is necessary to press "Reset".

DANGERDamage and/or injury caused by incorrect installation and/or incorrect use and/or unauthorized changes to the boiler and/or non-observance of the manufacturer’s instructions and/or of the relative standards/laws in force in the country of installation, shall release the manufacturer from any and all liability.


3.6.1 Possible configuration of air intake and flue gas venting ducts

Type B22• Boiler intended for connection to a chimney pipe or a device

for flue gas venting external to the boiler room.• Combustion air is taken directly from the boiler room itself whi-

le flue gas is conveyed to the outside.• The boiler is not to be fitted with anti-wind gust device; it has

to be equipped with a fan mounted downstream of the combu-stion chamber/heat exchanger.

Type C12• Boiler intended for connection to horizontal outlet and intake

ducts connected to the outside by means of coaxial or split ducts.

• The minimum distance between the air intake duct and the flue gas venting duct must be at least 250 mm (see figure opposite), whereas both terminals must be contained within a square measuring 500 x 500mm.

Type C32• Boiler intended for connection to vertical outlet and intake

ducts connected to the outside by means of coaxial or split ducts.

• The minimum distance between the air intake duct and the flue gas venting duct must be at least 250 mm (see figure opposite), whereas both terminals must be contained within a square measuring 500 x 500mm.

Type C42• Boiler intended for connection to collective chimney pipe sy-

stem that includes two ducts, air intake and flue gas venting. These ducts may be coaxial or split.

• The chimney must be compliant with applicable legislation and standards.


Type C52• Boiler with separate pipes for combustion air intake and flue

gas evacuation.• These flues may discharge in areas at a different pressure.• The terminals may not face each other from opposed walls.

Type C62• Boiler designed to be sold without air intake or flue gas ven-

ting ducts.• Flue gas venting and air intake to be ensured by using com-

mercially available pipes, which are to be certified separately (in compliance with the legislation and standards in force in the country of installation).

Type C82• Boiler intended to be connected to combustion air terminal

and to a single flue gas terminal or collective chimney.• The chimney must be compliant with applicable legislation

and standards.


3.6.2 Air intake and flue gas venting via 100/60 mm coaxial pipes

WARNINGThe pipe length information refers to air intake/flue gas venting ducts made from smooth, rigid pipes approved and sup-plied by the manufacturer.

Type C12

CTFS 9 - 11 - 13 - 15 - 18

• Minimum permissible length of horizontal coaxial pipes is 0.5 metres.• Maximum permissible length of horizontal coaxial pipes is 6 metres.• For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.• For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.• With "wall-mounted terminal", maximum permissible length is to be reduced by 1 meter.• The duct is to be tilted down by 1% toward its outlet, to prevent rain water from entering the boiler.

Use the diaphragms supplied with the boiler (see Fig. 6 0KITCONC00 (100/60 mm)).

Pipe length (m) Flue gas venting diaphragm diameter0 ≤ L ≤ 1 Ø 381 < L ≤ 3 Ø 403 < L ≤ 6 Ø 42

Tab. 14 Table indicating coaxial pipes 100/60 C12 type - CTFS 9-11-13-15-18

CTFS 24

• Minimum permissible length of horizontal coaxial pipes is 0.5 metres.• Maximum permissible length of horizontal coaxial pipes is 5 metres.• For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.• For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.• With "wall-mounted terminal", maximum permissible length is to be reduced by 1 meter.• The duct is to be tilted down by 1% toward its outlet, to prevent rain water from entering the boiler.


Pipe length (m) Flue gas venting diaphragm diameter0 ≤ L ≤ 1 Ø 431 < L ≤ 3 Ø 473 < L ≤ 5 -

Tab. 15 Table indicating coaxial pipes 100/60 C12 type - CTFS 24

Type C32

CTFS 9 - 11 - 13 - 15 - 18

• Minimum permissible length for vertical coaxial pipes is 1 metre, equal to the length of the chimney.• Maximum permissible length for vertical coaxial pipes is 6 metres, including the chimney.• For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.• For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.• With "roof-mounted terminal", maximum permissible length is to be reduced by 1.5 meters.


Pipe length (m) Flue gas venting diaphragm diameter0 ≤ L ≤ 1 Ø 381 < L ≤ 3 Ø 403 < L ≤ 6 Ø 42

Tab. 16 Table indicating coaxial pipes 100/60 C32 type - CTFS 9-11-13-15-18


CTFS 24

• Minimum permissible length for vertical coaxial pipes is 1 metre, equal to the length of the chimney.• Maximum permissible length for vertical coaxial pipes is 5 metres, including the chimney.• For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.• For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.• With "roof-mounted terminal", maximum permissible length is to be reduced by 1.5 meters.


Pipe length (m) Flue gas venting diaphragm diameter0 ≤ L ≤ 1 Ø 431 < L ≤ 3 Ø 473 < L ≤ 5 -

Tab. 17 Table indicating coaxial pipes 100/60 C32 type - CTFS 24

The illustrations are indicative only. When installing accessories, refer to the instructions supplied with the accessories themselves.

B

C

A

B

L

Fig. 6 0KITCONC00 (100/60 mm)

134

250

100

700

400

200

Fig. 7 Dimensions for coaxial pipe

A. DiaphragmB. Neoprene gasketC. Blanking cap


3.6.3 Air intake and flue gas venting via Ø 80 mm split pipes

WARNINGThe pipe length information refers to air intake/flue gas venting ducts made from smooth, rigid pipes approved and sup-plied by the manufacturer.

Installation types: C42, C52 and C82

For all systems with separate air intake and flue gas vent pipes, the suitable standard split pipe kit (0SDOPPIA13) must be used, it includes two air deflectors, retaining screws, seals and the following parts:A. a female flanged stub pipe Ø 80 mm for connecting air intake duct;B. a female flanged stub pipe Ø 80 mm for connecting flue gas venting duct with relevant deflector;

DANGERIf the original standard split pipe kit is not used, correct boiler operation is not guaranteed.

CTFS 9 - 11 - 13 - 15 - 18

Air intake• Minimum permissible length of flue gas venting pipe is 0.5 metre.• Each wide radius 90° air-intake elbow (R=D) is equivalent to a 1.5 metre long straight pipe section.• Each narrow radius 90° air-intake elbow (R=D) is equivalent to a 2.5 metre long straight pipe section.• Every air intake pipe length of one metre is equivalent to a 1 metre long straight pipe section.• Every split pipe chimney at intake is equivalent to a 7.0 metre long straight pipe section.• The air intake pipe is equivalent to a 4.0 metre long straight pipe section.• Install the specific air deflector (see Fig. 8 0SDOPPIA13).

WARNINGInstall the intake Ø 47 mm diaphragm.

Flue gas vent• Each wide radius 90° elbow (R=D) in flue gas vent equals to a 1.5 m long straight pipe section.• Each narrow radius 90° elbow (R<D) in flue gas vent equals to a 2.5 m long straight pipe section.• Each air intake duct length of one metre is equivalent to a 1 metre long straight pipe section.• Every split pipe chimney at glue gas vent is equivalent to a 5.5 metre long straight pipe section.

Use the diaphragms supplied with the boiler.

Pipe length (m) Flue gas venting diaphragm diameter1 ≤ L ≤ 10 Ø 41

10 < L ≤ 20 Ø 4720 < L ≤ 30 -

Tab. 18 Flue gas venting duct length and diaphragm diameter 80+80 - CTFS 9-11-13-15-18


CTFS 24

Air intake• Minimum permissible length of flue gas venting pipe is 0.5 metre.• Each wide radius 90° air-intake elbow (R=D) is equivalent to a 1.5 metre long straight pipe section.• Each narrow radius 90° air-intake elbow (R=D) is equivalent to a 3.0 metre long straight pipe section.• Every air intake pipe length of one metre is equivalent to a 1 metre long straight pipe section.• Every split pipe chimney at intake is equivalent to a 7.0 metre long straight pipe section.• Install the specific air deflector (see Fig. 8 0SDOPPIA13).

WARNINGInstall the intake Ø 50 mm diaphragm.

Flue gas vent• Each wide radius 90° elbow (R=D) in flue gas vent equals to a 1.5 m long straight pipe section.• Each narrow radius 90° elbow (R<D) in flue gas vent equals to a 2.5 m long straight pipe section.• Each air intake duct length of one metre is equivalent to a 1 metre long straight pipe section.• Every split pipe chimney at glue gas vent is equivalent to a 5.5 metre long straight pipe section.

Use the diaphragms supplied with the boiler.

Pipe length (m) Flue gas venting diaphragm diameter1 ≤ L ≤ 9 Ø 49

9 < L ≤ 16 -

Tab. 19 Flue gas venting duct length and diaphragm diameter 80+80 - CTFS 24

The illustrations are indicative only. When installing accessories, refer to the instructions supplied with the accessories themselves.

A

B

(supplied with the boiler)

Fig. 8 0SDOPPIA13

250

700

400

200 108134

74Ø 80

Fig. 9 Dimensions for split pipes


H ≥ 150 mm

500

mm

2

1

Fig. 10 Air intake and flue gas venting examples

135 mm

≥ 2

50 m

m

45 mm500 mm

500

mm

3

Fig. 11 Air intake and flue gas venting example

Example 1 . . . . . Primary air intake and flue gas venting via two opposite external perimeter walls.Example 2 . . . . . Primary air intake via perimeter wall and flue gas vent on roof.Example 3 . . . . . Primary air intake via perimeter wall and flue gas vent via same external perimeter wall.

3.6.4 Installation type: C62

CTFS 9 - 11 - 13 - 15 - 18

• Maximum chimney residual head (intake-venting): 61.5 Pa.• The maximum allowed temperature of the combustion air is of 70° C.• The maximum nominal operating temperature of the combustion products is of 150° C.• The exhaust gas temperature is 150° C.• Maximum flue gas recirculation: 10%.• Avoid condensate build-up inside the equipment.• The intake and discharge pipes can not be installed on opposed walls.

CTFS 24

• Maximum chimney residual head (intake-venting): 40 Pa.• The maximum allowed temperature of the combustion air is of 70° C.• The maximum nominal operating temperature of the combustion products is of 150° C.• The exhaust gas temperature is 150° C.• Maximum flue gas recirculation: 10%.• Avoid condensate build-up inside the equipment.• The intake and discharge pipes can not be installed on opposed walls.


3.7 Checking combustion efficiency

3.7.1 Flue cleaning function• The boiler features a flue cleaning function which must be used to measure combustion efficiency during operation and to adjust

the burner.• To activate the flue cleaning function, press and hold the buttons - DHW and RESET simultaneously for 5 seconds. The current to

modulation coil (in mA) and the symbol are shown on the LCD.• When the flue cleaning function is activated with the boiler in "WINTER" or "CH ONLY" mode, the boiler performs the ignition se-

quence and then operates at a fixed power output.• To exit the flue cleaning mode, press “Reset” or wait 15 minutes.

3.7.2 Measurement procedureCoaxial duct systemIn order to verify combustion efficiency the following measurements must be implemented:• assess combustion air temperature from opening 1 (see ref. (A) Fig. 12 Examples of flue gas testing points , for sealed chamber

boilers provided with pipes with preset holes).• assess flue gas temperature and CO2 quantity from no. 2 opening (see ref. (A) Fig. 12 Examples of flue gas testing points , for

sealed chamber boilers provided with pipes with preset holes).Carry out specific measurements when the boiler has stabilised.

Split ducts systemIn order to verify combustion efficiency the following measurements must be implemented:• assess combustion air temperature from opening 2 (see ref. (B) Fig. 12 Examples of flue gas testing points , for sealed chambers

provided with pipes with preset holes).• assess flue gas temperature and CO2 quantity from no. 1 opening (see ref. (B) Fig. 12 Examples of flue gas testing points , for

sealed chamber boilers provided with pipes with preset holes).

Carry out specific measurements when the boiler has stabilised.

ANALYZER PROBES

ANALYZER PROBES

Fig. 12 Examples of flue gas testing points


3.8 Connection to gas mains

DANGERBefore connecting the boiler to the gas mains, make sure that the gas type and the supply conditions correspond to the specifications on the boiler technical data plate.If this is not the case, do not connect the boiler to the gas mains.

Cross-section gas pipe size must be chosen depending on its length, layout pattern, gas flow rate.Gas supply pipe cross-section must be equal or greater than boiler gas pipe.

DANGERComply with installation standards enforced in the country where the boiler is installed which are considered as fully transcribed in this booklet.Remember that before operating an indoor gas distribution system and before connecting it to a meter, it must be che-cked for leaks.If some system parts are not visible, the leak test is to be carried out before the pipes are covered.Leak test is NOT to be carried out employing flammable gas: use air or nitrogen for this purpose.Once gas is in the pipes, leak test by a naked flame is forbidden; use specific products available on the market.When connecting the boiler to gas supply network, it is COMPULSORY to install an appropriately sized gasket (A) made from suitable material (see Fig. 13 Connection to gas mains).The boiler gas inlet coupling is NOT suitable for hemp, teflon tape or similarly made gaskets.

A

Fig. 13 Connection to gas mains

3.9 Hydraulic connections

3.9.1 Central heatingPrior to installing the boiler, the hydraulic system is to be cleaned in order to remove impurities; they could be present in system com-ponents and damage the pump and the heat exchanger.The CH outlet and return pipes must be connected to the respective 3/4” connectors M and R on the boiler (see Fig. 5 Paper tem-plate).When calculating the cross section of CH system pipes, bear in mind load losses induced by radiators, thermostatic valves, radiator gate valves, and the configuration of the system itself.


WARNINGAs for water treating in the domestic heating systems in order to optimise efficiency and safety, ensure a long life, trouble-free operation of auxiliary equipment, minimise power consumption, thereby integrating the standards and rules in force in the country of installation, it is recommended to use specific products suitable for multi-metal heating systems.Water pH value must be between 7 and 8.

WARNINGIt is advisable to convey the discharge flow of boiler safety valve to the sewer system. Should the above precaution not be implemented and the safety valve be activated, boiler room flooding may occur.The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure to follow the above mentioned instructions.

3.9.2 DHWPrior to installing the boiler, the hydraulic system is to be cleaned in order to remove impurities; they could be present in system com-ponents and damage the pump and the heat exchanger.Cold water inlet and DHW outlet shall be connected to the boiler through the dedicated 1/2" F and C fittings (see Fig. 5 Paper tem-plate).Hardness of water supplied to the boiler may increase the plate heat exchanger cleaning/replacement intervals.

WARNINGDepending on the hardness of the mains water supply, ascertain whether or not to install appropriate domestic water treatment systems using water treatment products suitable for drinking water and compliant with the regulations and standards in force in the country of installation.Water treatment is always advisable when water supplied to the boiler has a hardness that is more than 15°F.Water supplied by commonly marketed water softeners could, due to the chemical and physical characteristics that it takes, not be compatible with some heating system components as the loading of the system is done with DHW system water.For this reason it is better to use polyphosphate feeders.

3.10 Connection to electrical mainsThe boiler is supplied with a three-poled power cable, already connected to the electronic board and it is provided with a safety clamp.The boiler is to be connected to a 230V-50Hz electrical power supply.When connecting it to power mains, follow correct phase / neutral polarity sequence.Installation standards must be complied with and they are herein considered as entirely transcribed.An easily accessible two-poled switch, with a minimum 3 mm distance between contacts, is to be installed ahead of the boiler. The switch is to allow power supply cut-off in order to safely perform maintenance and service procedures.Power supply to the boiler must be fitted with a residual-current circuit breaker having suitable disconnection capacity. Electric power supply must be properly earthed.The above mentioned safety measure must be verified. If in doubt, ask a qualified technician to thoroughly check the power network.

WARNINGThe manufacturer cannot be held responsible for any damage caused by failure to earth the system correctly: gas, water, or CH system pipes are not suitable for grounding power networks.


3.11 Connection to ambient thermostat (optional)The boiler is designed to be connected to an ambient thermostat (optional, not compulsory).Ambient thermostat contacts must be properly sized in compliance with a load of 4 mA at 20 Vdc.The ambient thermostat cables must be connected to terminals (3) and (4) of the electronic board (see Wiring diagram on page 44) after eliminating the jumper supplied as a standard with the boiler.The ambient thermostat cables are not to be grouped together in the same sheath as power mains supply cables.

3.12 Room temperature installationThe boiler can be connected to sensor for room temperature measurement (supplied as standard).If an ambient probe is installed, the external probe cannot be installed

WARNINGOnly original ambient temperature probes supplied by the manufacturer must be used.If non-original ambient temperature probes are used, correct operation of the boiler and ambient probe cannot be gua-ranteed.

The room temperature sensor must be connected by means of a double insulated wire, minimum cross-section 0.35 mm².The ambient probe must be connected to terminals (1) and (2) of boiler electronic board.

WARNINGThe ambient temperature probe cables must NOT be routed together with power cables.

If the room temperature sensor installed, the parameter P21 must be set to 1 while terminals (3) and (4) of the electronic board must be short-circuited.To install the ambient probe refer to the instructions attached to the probe.The ambient probe must be installed on an indoor wall at a height of approximately 1.5 m from the floor and in a suitable location for measuring ambient temperature: do not install in recess or corners, behind doors or curtains, and install away from heat sources, direct sunlight, air draughts and water sprays.The ambient probe automatically modifies the CH flow temperature in relation to:• Measured ambient temperature.• Selected ambient temperature.

The ambient temperature is set using +/- CH buttons that, with ambient probe installed, no longer work to set the heating water tem-perature.Through boiler parameter P43 it is possible to display the value of the ambient temperature detected by the probe.

3.13 Installation of the (optional) external probe and sliding temperature operationThe boiler can be connected to an (optional) external temperature probe (optional, provided by the manufacturer) for sliding tempe-rature operation.If an external probe is installed, the ambient probe cannot be installed

WARNINGOnly original external temperature probes supplied by the manufacturer must be used.If non-original external temperature probes are used, correct operation of the boiler and external probe cannot be gua-ranteed.

The external temperature probe must be connected by means of a double insulated wire, minimum cross-section 0.35 sq.mm.The external probe must be connected to terminals (1) and (2) of boiler electronic board.


WARNINGThe temperature probe cables must NOT be routed together with power cables.

The temperature probe must be installed on an outside wall facing NORTH - NORTH EAST, in a position protected from weather.Do not install near a window, ventilation openings or sources of heat.The external temperature probe automatically modifies the CH flow temperature in relation to:• Measured external temperature.• Selected thermoregulation curve.• Selected fictitious ambient temperature.

The thermoregulation curve is selected via parameter P10.During adjustment, the set value will flash on LCD.

The fictitious ambient temperature is set using CH +/- buttons that, with external probe installed, no longer work to set the heating water temperature (see Operation with external probe (optional) on page 13).Through boiler parameter P29 it is possible to display the value of the outside temperature detected by the external probe.

The figure shows the curves for a fictitious ambient temperature of 20°C.Parameter P10 allows selecting the curve value shown (see Fig. 14 Thermoregulation curves).If fictitious ambient temperature value is edited on boiler display, the curves shift up or down, respectively, by the same amount.With a fictitious ambient temperature setting of 20°C, for example, if you select the curve corresponding to parameter 1 and the outdo-or temperature is - 4°C, the CH flow temperature will be 50°C.

100

90

80

70

60

50

40

30

20

10

020 16 12 -12 -20 -28 -36 -40

3.02.0

1.5

1.0

0.8

0.6

0.4

0.2

2.5

8 4 0 -4 -8 -16 -24 -32Te [°C]

Tm [°

C]

Fig. 14 Thermoregulation curves

Tm indicates flow water temperature in °CTe indicates external temperature in °C


3.14 TSP parametersThe boiler operation is controlled by several parameters.To display the parameters, press and hold the buttons + DHW and - DHW simultaneously for 3 seconds.The LCD display alternates the parameter number every 3 seconds (e.g. P03) with the parameter value (e.g. 01).Scroll through the parameters by pressing +/- DHW buttons.To quit the parameter viewing mode press the Reset button.

To change parameters, press the Reset and - HEATING buttons together for 3 seconds.The LCD display alternates the parameter number every 3 seconds (e.g. P03) with the parameter value (e.g. 01).Scroll through the parameters by pressing CH +/- buttons.As soon as you reach the one to be modified, press Select operating status.The symbol turns on to indicate that you can edit the parameter value.The parameter value can be changed with the +/- HEATING buttons.To confirm modification press Select operating status button.To quit the parameter editing mode press the Reset button.

Parameter Description Configurable value range Default values Notes

P0 Fuel gas type 0, 1 According to the model

0 = natural gas1 = lpg

P1 Maximum current to modulation coil in heating mode 20 - 180 mA According to the

model

SeeAdaptation to other gas types and

burner adjustment

P2 Ignition power setting 0 ÷ 100% 0%

If P2=0, ignition ramping is imple-mented.

If P2≠0, the boiler operates at the power set (P2=1 minimum power ÷

P2=100 maximum power)P3 Heating thermostat timing 0 ÷ 99 min. 4 min. n.a.P4 CH power rising ramp timer 0 ÷ 30 min. 4 min. n.a.

P5Timer for CH post-circulation,

freeze protection and flue cleaning function

0 ÷ 199 sec. 30 sec. n.a.

P6 Setting of "solar" DHW thermostats 0 ÷ 1 0 0 = normal; 1 = solar

P7 Water hammer protection delay, configurable 0 ÷ 10 sec. 0 sec. n.a.

P8 Ambient thermostat reading delay 0 ÷ 199 sec. 0 sec. n.a.P9 Boiler type selection 0 ÷ 2 2 0.1 = other; 2 = mono-thermal

P10 Heating output curves 0,0 ÷ 3,0 1,5 resolution 0.1 (only with connected external probe)

P11 mono-thermal boiler type selection 1 ÷ 3 1 1= combined instantaneous, plates, 2=CH only, 3 = water heater

P12 Heating timer reset temperature 25 ÷ 78 °C 30 °C n.a.

P13 Maximum ΔT between flow and return 0 ÷ 78 K 30 K 0 = function disabled

P14 Default parameters set (except for P0, P9) 0 ÷ 1 0 0 = user's parameters

1 = default parameters

Tab. 20 Limits to be set for TSP parameters and default values in relation to boiler type (TSP0) - I


Parameter Description Configurable value range Default values Notes

P15 Ambient probe triggering differential OFF 0.0 ÷ 1.0 °C 0.0 °C resolution 0.1 (only with connected

ambient probe)

P16 Ambient probe triggering differential ON 0.1 ÷ 1.0 °C 0.5 °C resolution 0.1 (only with connected

ambient probe)

P17 Ambient probe correction range 0.0 ÷ 10.0 °C 5 °C resolution 0.1 (only with connected ambient probe)

P18 Type of modulation with connected ambient probes 0 ÷ 1 1 0 = on/off; 1 = ambient probe mo-

dulation

P19 Flow temperature with P18=0 and P21=01 30 ÷ 78 °C 60 °C only with connected ambient probe

P20 Type of temperature visualization on display 0 ÷ 2 0

0 = flow temperature1 = ambient/external probe tempe-

rature2 = return temperature

P21 Additional inlet matching 0 ÷ 2 0 0 = no probe; 1 = ambient probe; 2 = external probe

P22 Anti-seize function timer 0 ÷ 180 sec. 10 sec. n.a.P23 Anti-legionella function timer 0 ÷ 199 days 15 days n.a.P24 Anti-legionella function temperature 35 ÷ 70 °C 65 °C n.a.

P25 Anti-legionella function execution timer 1 ÷ 199 min. 30 min. n.a.

P26 Display of flow temperature n.a. n.a. n.a.P27 Return temperature displaying n.a. n.a. n.a.P28 DHW temperature displaying n.a. n.a. n.a.

P29 Ambient or external temperature display n.a. n.a. only with connected ambient or

external probe

P30 Display of boiler type n.a. According to the model

C = forced draughtB = natural draught

P31 Display of most recent boiler shut-down n.a. Fault code n.a.

P32 Display of penultimate boiler shut-down n.a. Fault code n.a.

P33 Display of third last boiler shut-down n.a. Fault code n.a.

P34 Display of fourth last boiler shut-down n.a. Fault code n.a.

P35 Display of fifth last boiler shut-down n.a. Fault code n.a.

P36 Display of reset shut-down and fault 0 ÷ 1 n.a. 0 = OFF1 = shut-downs and faults reset

P37 Number of faults since last reset n.a. n.a. n.a.P38 Modulation percentage indication n.a. n.a. 0 ÷ 100%P39 Board use month displaying n.a. n.a. n.a.

Tab. 21 Limits to be set for TSP parameters and default values in relation to boiler type (TSP0) - II


3.15 Filling the systemOnce all boiler connections have been completed, CH system can be filled.The procedure is to be cautiously carried out, following each step:• Open the bleeding valves on all radiators and verify the boiler automatic valve operation.• Gradually open the relevant filler cock, checking any automatic bleeding valves installed in the system properly work (see Fig. 2

Filler cock).• Close all radiator bleeding valves as soon as water starts coming out.• Check on pressure gauge that water pressure reaches the 1÷1.3 bar reading.• Shut the filler cock and bleed any air out again, by opening the air bleeding valves on radiators.• Start the boiler and bring the system to working temperature, stop the pump, and repeat air bleeding procedure.• Allow the system to cool and restore water pressure to 1÷1.3 bars.

WARNINGAs for water treating in the domestic heating systems in order to optimise efficiency and safety, ensure a long life, trouble-free operation of auxiliary equipment, minimise power consumption, thereby integrating the standards and rules in force in the country of installation, it is recommended to use specific products suitable for multi-metal heating systems.Water pH value must be between 7 and 8.

WARNINGAfter long inactivity of the boiler, its pump may be stuck.Before starting up the boiler, make sure that the pump is operating, with the following procedure:• Remove the boiler outer casing.• Unscrew the protective cap at the centre of the pump motor.• When the protection cap is removed, some water may flow out.• Put a screwdriver into the hole and manually rotate the circulation pump shaft clockwise.• Before refitting the boiler casing ensure that all surfaces are properly dried.• Once the unblocking operation is completed, screw the protective cap back on and check for water leaks.

WARNINGThe low water safety pressure switch will not electrically enable the burner ignition when water pressure is below 0.4-0.6 bar.The CH system water pressure must not be lower than 1 bar. Otherwise, fill the heating system.The procedure is to be followed while the system is cold.Pressure gauge is used to read pressure inside the heating circuit.


3.16 Starting up the boiler

3.16.1 Preliminary checksBefore starting the boiler, check that:• The flue gas venting duct and the relevant terminal are installed in conformity with the instructions: with the boiler operating, there

must be no leakage of combustion by-products from any of the gaskets.• The supply power to the boiler must be 230 V ~ 50 Hz.• The heating system is correctly filled with water (pressure gauge reading 1÷1.3 bar).• Any shut-off cocks in the system pipes are open.• The mains gas type is correct for the boiler calibration: convert the boiler to the available gas if necessary (see Adaptation to other

gas types and burner adjustment on page 46). This operation is to be exclusively carried out by qualified personnel.• The gas supply cock is open.• There are no fuel gas leaks.• The main switch installed adjacent to the boiler is turned on.• The safety valve is not blocked.• The 3-bar safety valve is not stuck.• The 3-bar (CH system) and 7-bar (DHW system) safety valves are not stuck.• There are no water leaks.• The pump has not seized.• The condensate trap installed on the boiler is discharging condensate correctly and is not stuck.

3.16.2 Switching on and switching offTo switch the boiler on and off, refer to the “Instructions for the User” (see Instructions for the user on page 8).

3.17 Available head

0

100

200

300

400

500

0 200 400 600 800 1000 1200

H

Q CTFS 9-11-13-15-18 CTFS 24

Fig. 15 Available head

Q . . . . . . . . . . . . Flow rate (l/h)H . . . . . . . . . . . . Available head (mbar)


3.18 Wiring diagram

1 2 3 4

1 2 3 4

P

P

P

230Vac50Hz

P

VG

SMSS

SR

SEXT/SAMB

TA

FL

APS

TS

DK

MDV

1234

FU

SE

E

VE

Fig. 16 Wiring diagram


Internal connectionsAPS : . . . . . . . . . air pressure switchDK : . . . . . . . . . . low water pressure swichE : . . . . . . . . . . . ignition/flame detection electrodeFL : . . . . . . . . . . flow switchMDV : . . . . . . . . . electric deviating valveP : . . . . . . . . . . . boiler pumpSM : . . . . . . . . . . CH NTC temperature probe 10k Ohm a 25°C B=3435SR : . . . . . . . . . . return NTC probe 10k Ohm at 25 °C B=3435SS : . . . . . . . . . . NTC DHW probe 10k Ohm at 25 °C B=3435VE : . . . . . . . . . . FanVG : . . . . . . . . . . gas valveTS : . . . . . . . . . . Safety thermostat on CH flow

Connections performed by the installer1-2: . . . . . . . . . . outdoor temperature probe NTC 10k Ohm at 25 °C B=3977 or ambient NTC probe 10k Ohm at 25°C B=3977 (SEXT/SAMB)3-4: . . . . . . . . . . room thermostat (TA)

3.18.1 Relationship between temperature and nominal resistance of all NTC probes (B=3435)

T (°C) 0 2 4 6 80 27203 24979 22959 21122 1945110 17928 16539 15271 14113 1305420 12084 11196 10382 9634 894830 8317 7736 7202 6709 625440 5835 5448 5090 4758 445250 4168 3904 3660 3433 322260 3026 2844 2674 2516 236970 2232 2104 1984 1872 176780 1670 1578 1492 1412 133690 1266 1199 1137 1079 1023

Tab. 22 Relationship between "Temperature and Nominal resistance" for temperature probes


3.19 Adaptation to other gas types and burner adjustment

WARNINGThis boiler is built to run on the type of gas specified on the packaging and on the boiler rating plate.Any later transformation is to be exclusively carried out by qualified personnel, using manufacturer designed accessori-es and following the procedure and adjustment instructions for an accurate boiler setting-up.

• disconnect the boiler from the electric power supply;• close the gas cock;• remove boiler outer front panel;• loosen the screws securing combustion chamber front panel to frame, then remove panel;• remove combustion chamber front part;• disconnect the gas pipe;• remove the main burner;• remove nozzles from main burner replacing them by new gas type correct diameter ones;

WARNINGThe copper gaskets must be installed.

• reinstall the main burner;• connect the gas pipe;• refit the chamber front part, the combustion chamber front panel and the boiler external front panel;• reconnect boiler to electric power supply, and open the gas cock;• change P0 parameter value (see table).• change P1 parameter value (see table).• adjust the gas valve.

Gas P0G20 00G30 01G31 01

Gas P1CTFS 9 CTFS 11 CTFS 13 CTFS 15 CTFS 18 CTFS 24

G20 58 66 74 84 120 120G30 87 99 110 121 170 170G31 97 109 120 132 170 170


3.19.1 Gas valve setting

Maximum heating output adjustment• Check the flow pressure value (see Operating data on page 20);• Remove the plastic cover A at the top of the modulator coil, protecting the pressure regulator adjuster screws;• Connect a pressure gauge to the pressure measurement point IN to check the input OUT and the output pressure;• Select boiler operating mode "WINTER" or "CH ONLY" by pressing the "Operating mode" button (C) on the control panel.• To activate the flue cleaning function, press and hold the buttons “info” and “Reset” simultaneously for 3 seconds. The CH flow

temperature and the symbol are shown on the LCD display.• Rotate the brass adjustment nut B CLOCKWISE as far as it will go to increase pressure to the nozzles, rotate ANTI-CLOCKWISE

to reduce pressure to nozzles;• For LPG operation, tighten the nut B completely in a CLOCKWISE direction.

Minimum heating output adjustment• Disconnect electrical power from the modulator spindle. D ;• Switch on the burner and check that the "MINIMUM" pressure value matches the value indicated (see Operating data on page 20);• To adjust the pressure, hold the brass nut B in place using a 10mm spanner (fig. 23, fig. 24 or fig. 25) and turn the plastic screw C

CLOCKWISE to increase the pressure, or ANTICLOCKWISE to reduce it;• Re-connect the electrical wiring to modulation coil.

Final settings• turn the boiler on and check its correct operation;• measure the minimum and maximum gas valve pressures again;• adjust as necessary.• e-fit the plastic cover A on to the screws;• close gas pressure test points;• check for gas leaks.

OUT

D

IN

A

C

B

Fig. 17 SIT 845

WARNINGAt the end of the adjustment, apply the relevant plate with indication of the new gas type.

Testing the boiler48

4. Testing the boiler

4.1 Preliminary checksBefore testing the boiler, it is recommended to check the following:• the flue gas venting duct and the relative terminal are installed in conformity with the instructions: there must be no leakage of

combustion by-products from any of the gaskets.• the supply power to the boiler must be 230 V ~ 50 Hz;• the system is correctly filled with water (pressure gauge reading 1 to 1.3 bar);• any shut-off cocks in the system pipes are open;• the mains gas type is correct for the boiler calibration: convert the boiler to the available gas when necessary; this operation must

only be performed by qualified technical personnel;• the gas supply cock is open;• there are no fuel gas leaks;• the main switch installed ahead of the boiler is turned on;• the 3-bar safety valve is not stuck;• there are no water leaks;• the pump has not seized.

WARNINGShould the boiler not be installed in compliance with the prevailing laws and standards, notify the system supervisor and do not test the boiler.

4.2 Switching on and switching offTo switch the boiler on and off, refer to the “Instructions for the User”.

Maintenance 49

5. Maintenance

WARNINGAny maintenance (and repair) work must only be carried out by qualified personnel.

The user is strongly advised to have the product serviced and repaired by a service centre or qualified personnel.Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.

Maintenance operations must be carried out at least once a year.

WARNINGDisconnect electric power supply before starting any maintenance procedure, involving replacement of components and/or cleaning inside parts of boiler.

5.1 Maintenance scheduleMaintenance operations include check and cleaning procedures. In particular:

Inspections and checks• Check general integrity of the boiler.• Check boiler and network gas supply for leakage.• Check gas supply pressure to boiler.• Check minimum and maximum gas pressures to boiler nozzles.• Check boiler ignition sequence.• Check the condition and seal integrity of the flue gas venting ducts.• Check air pressure switch operation.• Check integrity of safety devices of the boiler in general.• Check for water leaks and oxidised areas on the boiler’s couplings.• Check efficiency of the system safety valve.• Check expansion vessel filling pressure.• Check water pressure switch efficiency.

The following cleaning is to be done• Clean the general interior of the boiler.• Clean the gas nozzles.• Clean the air intake and flue gas venting circuits.• Clean the heat exchanger.

When checking the boiler for the very first time, also verify:• Boiler room suitability.• Diameter and length of flue gas system ducts.• Boiler installation in accordance to this “Installation use and maintenance” manual instructions.

WARNINGShould the boiler not operate correctly, while not posing danger to people, animals or property, notify the system super-visor both verbally and in writing.

5.2 Combustion analysisThe combustion parameters of the boiler, which have to be checked in order to determine efficiency and emissions, must be measu-red in compliance with applicable legislation and standards.

Malfunctions, possible causes and solutions50

6. Malfunctions, possible causes and solutions

6.1 Troubleshooting

BOILER STATUS

MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON-NEL'S TASKS

E01*

Burner does not ignite.

Gas supply failure.Check gas supply.

Check gas supply cock or gas network safety valve intervention.

Gas valve is disconnected. Contact qualified person-nel Reconnect it.

Gas valve is faulty. Contact qualified person-nel Replace it.

The board is faulty. Contact qualified person-nel Replace it.

Burner does not ignite: no spark.

Ignition/detection electrode faulty.

Contact qualified person-nel Replace the electrode.

Electronic board does not ignite. It is faulty.

Contact qualified person-nel Replace electronic board.

Burner ignites for a few seconds and goes off.

Electronic board does not detect flame: inverted

phase and neutral.

Contact qualified person-nel

Verify correct neutral and phase connection.

Ignition/detection electrode wire is interrupted.

Contact qualified person-nel Reconnect or replace wire.

Ignition/detection electrode faulty.

Contact qualified person-nel Replace the electrode.

Electronic board does not detect flame: it is faulty.

Contact qualified person-nel Replace electronic board.

Ignition heat input setting is too low.

Contact qualified person-nel Increase it.

Minimum heat input is not set correctly.

Contact qualified person-nel Check burner setting.

E02*Flow temperature excee-

ded the max. allowed value.

CH water does not flow in the system: pipes might be clogged, thermostatic valves might have shut,

system stopcocks might be closed.

Contact qualified person-nel Check system status.

Circulation pump is blo-cked or faulty.


Check the circulation pump.

Malfunctions, possible causes and solutions 51

BOILER STATUS


E03* Flue gas pressure switch is not operating.

Flue gas exhaust pressure switch is faulty


Check pressure switch: replace it if faulty.

The silicone pipes are disconnected or damaged.


Connect or replace silicone pipes

Air intake or flue gas vent flow is not correct.


Check air intake/flue gas venting ducts: clean or replace if necessary.

Fan is faulty. Contact qualified person-nel Replace it.

E04** CH system water pressure is low.

The system is leaking. Check system.Water pressure switch is

disconnected.Contact qualified person-

nel Reconnect it.

Water pressure switch is not operating: it is faulty.

Contact qualified person-nel Replace it.

E05** Flow probe not working.Probe is disconnected. Contact qualified person-

nel Reconnect it.

Probe is faulty. Contact qualified person-nel Replace it.

E06** DHW probe is not working.Probe is disconnected. Contact qualified person-

nel Reconnect it.


E15** The return probe is not working.

Probe is disconnected. Contact qualified person-nel Reconnect it.


Boiler is not supplying

DHW.

DHW flow switch is not working.

System insufficient pressu-re or flow rate.


Check DHW system.Check DHW flow switch

filter.DHW flow switch probe is

faulty or disconnected.Contact qualified person-

nel Replace or reconnect it.

DHW flow switch is blo-cked.

Contact qualified person-nel Replace it.

E44** The ambient probe is not working.

Probe is disconnected. Contact qualified person-nel Reconnect it.



BOILER STATUS


E72** Boiler does not recognise if it is of the B or C type.

Flue gas exhaust pressure switch is faulty


Check flue gas pressure switch: replace it if faulty.

The wires connecting the flue gas pressure switch to the boiler card are dama-

ged or interrupted.


Reconnect or replace wirings.

Air intake or flue gas vent flow is not correct.


Check air intake/flue gas venting ducts: clean or replace if necessary.

E76** Gas valve modulation coil is not working.

Electronic board and gas valve link is electrically disconnected or faulty.


Check connection to the gas valve.

Gas valve modulation coil is faulty.


Replace gas valve modula-tion coil.

E78* Flow temperature increa-ses too quickly.

Pump is seized. Contact qualified person-nel Unseize the pump.

Pump is faulty. Contact qualified person-nel Replace the pump.

(*) errors that can be reset bythe user, press and hold RESET.(**) self-resettable errors, they automatically reset as soon as the failure is fixed.In case of errors E22, E42, E75 and E77 contact a service centre or qualified personnel.


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Fondital S.p.A. Società a unico socio25079 VOBARNO (Brescia) Italy - Via Cerreto, 40

Tel. +39 0365/878.31Fax +39 0365/878.304e mail: [email protected]

www.fondital.com

The manufacturer reserves the right to modify his/her products as deemed necessary, without altering the basic characteristics of the products themselves.

Uff. Pubblicità Fondital IST 03 C 970 - 04 | Dicembre 2018 (12/2018)

INSTALLATION, USE AND MAINTENANCE · The boiler must be serviced periodically as indicated in the...

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