Fondital ITACA Series Installation, Use And Maintenance Manual
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Fondital ITACA Series Installation, Use And Maintenance Manual

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INSTALLATION, USE AND MAINTENANCE
It is compulsory to read this manual before proceeding with the boiler installation, use and
maintenance operations.
This boiler is intended for production of hot technical water only:
• For heating of residential, commercial and industrial rooms.
• For heating of industrial process water.
• For indirect production of domestic hot water.
Any other use is forbidden.
KC 12-24-28-32
KR 12-24-28-32
KRB 12-24-28-32
ITACA
EN
Translation of the
original instructions (in
Italian)

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Lisa
June 5, 2025

Error code 11? How do I access the ignition switch? Checked the has supply and the bottle is full, the boiler will not fire up?

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Summary of Contents for Fondital ITACA Series

  • Page 1 ITACA KC 12-24-28-32 KR 12-24-28-32 KRB 12-24-28-32 INSTALLATION, USE AND MAINTENANCE Translation of the original instructions (in Italian) It is compulsory to read this manual before proceeding with the boiler installation, use and maintenance operations. This boiler is intended for production of hot technical water only: •...
  • Page 2 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 We inform users that: • 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.
  • Page 3 General notes for installing and maintenance technicians, and users This 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.
  • Page 4 DANGER Carefully read the instructions relating to air intake and flue gas venting systems in the specific section of this manual. DANGER This boiler must be connected to a gas distribution system which complies with the existing technical standards. Check the gas system state of conservation before installing the boiler. Any connection to a gas system which does not comply with the existing technical standards is forbidden.
  • Page 5 DANGER Before starting the boiler, and each time it is at a standstill for several days, make sure the trap is full of water. If the trap is empty, fill it by pouring water into the boiler through the flue gas venting duct. WARNING The boiler must be serviced periodically as indicated in the relevant section of this manual.
  • Page 6 Rapid operating instructions The following instructions will help you to switch the boiler on quickly and regulate it for immediate use. WARNING It is presumed that the boiler has been installed by a qualified installer, it has been commissioned and is ready to operate correctly.

  • Page 7: Table Of Contents

    Instructions for the user ..........Control panel ............................11 Interpreting boiler status from display indications...
  • Page 8 Malfunctions, possible causes and solutions ......Troubleshooting .............................92...
  • Page 9 Fig. 1 Control panel ................Fig.
  • Page 10 Tab. 1 Displayable parameters with info button ............Tab.

  • Page 11: Instructions For The User

    1. Instructions for the user Control panel Fig. 1 Control panel A. Temperature selection (day/night) and information recall. B. Weekly programme for temperature zones and manual programme selection. C. Time and ambient temperature setting. D. Set the domestic hot water (DHW +/-). E.
  • Page 12 Ref. Symbol Steady on Flashing Indication of "parameter" inside the Not used parameter menu Displaying of the number of parame- ters, or of the system pressure, or of Not used the burner power percentage Automatic filling procedure is active Not used Indication of the temperatures and va- Not used lues of fault and shutdown parameters...

  • Page 13: Interpreting Boiler Status From Display Indications

    Ref. Symbol Steady on Flashing Indication of the centigrade degrees Not used Solar pump or solar valve active Not used Indication of system pressure measu- Not used rement unit Percentage indication Not used During parameter editing, the wrench symbol stays on until the set datum is Not used confirmed.
  • Page 14 Boiler switch in SUMMER or WINTER mode. DHW function enabled. DHW temperature is displayed. For models KC only. SUMMER WINTER Boiler switch in WINTER mode or CH ONLY. CH function active. The flow water temperature is displayed. WINTER CENTRAL HEATING ONLY Boiler switch in SUMMER or WINTER mode.

  • Page 15: Selecting The Operating Mode

    Selecting the operating mode Whenever key is pressed, the "SUMMER”, “WINTER” , “CH ONLY”, “OFF” modes are enabled in sequence. At this stage, all buttons are enabled. 1. "OFF" operating status 2. "SUMMER" operating status When the "OFF" mode is enabled, no When the "SUMMER"...

  • Page 16: Comfort Function Enable/Disable

    Comfort function enable/disable This function keeps the plate heat exchanger hot, to minimise the waiting time for the production of DHW.When the "comfort" icon is on, the function is enabled. When it is off the function is disabled and the boiler is in standard DHW operating mode for an instant boiler.For KR/KRB models with CH only, the "comfort"...

  • Page 17: Day Temperature" And "Night Temperature" Setting

    "Day temperature" and "night temperature" setting When one or more ambient probes are connected to boiler electronic board, two levels of desired ambient temperatures can be set. Boiler will manage the heating request based on the set temperatures, as follows. If no ambient probe is connected to the boiler, temperatures cannot be set.

  • Page 18: Manual" Programme Setting

    "Manual" programme setting The "manual" mode selection indicated with symbol , allows activating the heating function, 24 hours a day, in both zones at the "day temperature", disabling at the same time zone 1 and zone 2 programming. External water heater, if there is one, is heated according to the specific programme. 2.

  • Page 19: Ch Programme Mode

    1.10 CH programme mode To access zone 1 heating programme 2. Press OK to access zone program- ming function. "PROG" wording displaying or editing, press button starts flashing together with number twice. 1 (Monday). 1. The display shows zone 1 symbol flashing, sun or moon symbols, bars on or off, respectively , at 00:00.

  • Page 20: Parameter Display

    1.11 Parameter display Press to scroll the different parameter values. You can quit this function at any time by simply pressing the button. To find the meaning of all parameters, see TSP parameters on page 62. Par. DESCRIPTION P30 - TSP30 external temperature displayed (if an external probe is installed).

  • Page 21: Boiler Operation

    1.14 Boiler operation 1.14.1 Switching on DANGER It 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. •...
  • Page 22 1.14.3 DHW function DHW production function is enabled on model KC and on KR/KRB models with external water heater (optional). DHW production function is enabled in one of the following operating modes: SUMMER or WINTER. Such function has always priority over CH water supply. To set the domestic hot water temperature, press DHW +/- buttons.
  • Page 23 1.14.5.3 Plate heat exchanger freeze protection (only model KC) When 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.
  • Page 24 1.14.8 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.

  • Page 25: Boiler Shut-Down

    1.15 Boiler shut-down The boiler shuts down automatically if a malfunction occurs. To determine the possible causes of malfunction, see Troubleshooting on page 92. Below is a list of shut-down types and the procedure to follow in each case. 1.15.1 Burner shut-down Fault code E01 is displayed flashing on the display in the event of burner shut-down due to missing flame.
  • Page 26 1.15.3.2 KC model with automatic filling enabled (P94 = 1) In case the system pressure falls below 0.4 bar, the water pressure switch triggers and the display shows both fault code E04 and the current pressure. All buttons are disabled. When automatic filling is activated, symbol and pressure current value are displayed.

  • Page 27: Maintenance

    1.15.7 Alarm due to (optional) Remote Control connection malfunction The boiler recognises whether or not there is a Remote Control (optional, not compulsory). If the boiler does not receive information from the Remote Control after the Remote Control itself is connected, the boiler attempts to re-establish communication for 60 seconds, after which the fault code E31 is shown on the remote control display.

  • Page 28: Technical Features And Dimensions

    2. Technical features and dimensions Technical features This boiler is equipped with a fully pre-mixed gas burner. The following models are available: • KC condensing boiler with sealed chamber and forced draught, supplying CH water and instant DHW production; • KR condensing boiler with sealed chamber and forced draught, supplying CH water only.
  • Page 29 2.1.3 Operating features • CH electronic flame modulation with timer-controlled rising ramp (60 seconds, adjustable). • DHW electronic flame modulation (mdoels KC and KR/KRB with optional water heater). • DHW priority function (model KC and models KR/KRB with optional water heater) •...

  • Page 30: Dimensions

    Dimensions KC model Fig. 3 Model KC dimensions RUGIADA PLUS N CDX . . RUGIADA PLUS NB CDX CH system flow (3/4”) DHW outlet (1/2") Gas inlet (1/2”) Cold water inlet (1/2") Filler cock CH system return (3/4”) System unloading cock. Technical features and dimensions...
  • Page 31 KR model Fig. 4 Model KR dimensions RUGIADA PLUS N CDX . . RUGIADA PLUS NB CDX CH system flow (3/4”) Gas inlet (1/2”) Cold water inlet (1/2") CH system return (3/4”) System unloading cock. Technical features and dimensions...
  • Page 32 KRB model Fig. 5 Model KRB dimensions RUGIADA PLUS N CDX . . RUGIADA PLUS NB CDX CH system flow (3/4”) Water heater secondary flow (1/2") Gas inlet (1/2”) Water heater secundary return (1/2") CH system return (3/4”) System unloading cock. Technical features and dimensions...

  • Page 33: Boiler Layouts

    Boiler layouts 2.3.1 Model KC hydraulic layout Condensate drain CH system flow DHW outlet Gas inlet 28 27 26 Cold water inlet CH system return Fig. 6 Model KC hydraulic layout 1. Condensate trap 16. 3-bar safety valve 2. Modulating gas valve 17.
  • Page 34 2.3.2 Model KR hydraulic layout Condensate drain CH system flow Gas inlet Cold water inlet CH system return Fig. 7 Model KR hydraulic layout 1. Condensate trap 12. Ignition/detection electrode 2. Modulating gas valve 13. Expansion vessel 3. Flow temperature twin probe 14.
  • Page 35 2.3.3 Model KRB hydraulic layout Condensate drain CH system flow Water heater secondary flow RB R Gas inlet Secondary return from water heater CH system return Fig. 8 Model KRB hydraulic layout 1. Condensate trap 13. Expansion vessel 2. Modulating gas valve 14.

  • Page 36: Operating Data

    Operating data Burner pressures reported in the following page must be verified after the boiler has been operating for 3 minutes. Gas category: II2H3P Flue CO value Flue CO value Gas mains pres- Diaphragm dia- Nozzle sure meter Fuel Max. output Min.

  • Page 37: General Characteristics

    General characteristics Description KC 12 KC 24 KC 28 KC 32 CH nominal heat input 12,0 23,7 26,4 30,4 Minimum heat input Maximum heat output (80-60°C) - CH 11,7 23,0 25,5 29,4 Minimum heat output (80-60°C) - CH Maximum heat output (50-30°C) - CH 12,6 25,0 27,9...
  • Page 38 KR 12 KR 24 KR 28 KR 32 Description KRB 12 KRB 24 KRB 28 KRB 32 CH nominal heat input 12,0 23,7 26,4 30,4 Minimum heat input Maximum heat output (80-60°C) - CH 11,7 23,0 25,5 29,4 Minimum heat output (80-60°C) - CH Maximum heat output (50-30°C) - CH 12,6 25,0...
  • Page 39 Description Max. output Min. output 30% load Casing heat loss with burner on 0,40 7,85 Casing heat loss with burner off 0,53 Flue system heat loss with burner on 2,50 1,85 Flue system mass capacity 8,25 0,89 Flue temp. – air temp. °C 57,9 34,5...

  • Page 40: Erp And Labelling Data

    0,08 0,08 Contact details: FONDITAL S.p.A. - Via Cerreto, 40 I-25079 VOBARNO (Brescia) Italia - Italy (*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet. (**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
  • Page 41 0,08 0,08 Contact details: FONDITAL S.p.A. - Via Cerreto, 40 I-25079 VOBARNO (Brescia) Italia - Italy (*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet. (**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).

  • Page 42: Instructions For The Installer

    3. Instructions for the installer Installation standards This 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.
  • Page 43 PT RU NL DE GB GR RO CZ HU TR Salida agua Sortie eau Wyjście ciepłej Saída de Έξοδο Uscita acqua Uitgang warm Ie ire apă cal- Sıcak su caliente sani- chaude sani- wody água quente (Auslauf War- θερ ού νερού Výstup TPV calda sanitaria tapwater...

  • Page 44: Installing The Boiler

    Installing the boiler DANGER Before 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.

  • Page 45: Air Intake And Flue Gas Venting System

    Air intake and flue gas venting system Flue 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. DANGER For the air intake/flue gas venting systems, specific, manufacturer approved, condensate acid-resistant pipes and sy- stems must be used, suitable for condensing boilers.
  • Page 46 3.6.1 Starter kit installation Refer to Fig. 10 Split kit installation and to Fig. 11 Coaxial kit installation. DANGER There must be no leakage of combustion by-products from any of the gaskets. Split kit (optional) Clean the boiler roof from dust and other debris due to any masonry works. Fix the adhesive gasket under the flange connection for flue gas venting system (A).
  • Page 47 3.6.2 Pipe and terminal installation DANGER Flue gas venting pipes are to be installed tilted toward the boiler so that condensate runs toward the combustion cham- ber, which is designed for condensate collection and drainage. Should the above procedure not be possible, it is necessary to install, in condensate stagnation areas, devices designed for condensate collection and conveying to the condensate drain system.
  • Page 48 Wall-mounted terminals The final parts of air intake and flue gas venting terminals, both split and coaxial, feature a groove (A) to fix the external collar (see Fig. 14 Wall-mounted terminal installation). Insert the external collar into the terminal until reaching the groove. Insert the terminal, from outside, making the external collar adhere to the wall.
  • Page 49 Roof flues Insert the intake and/or flue gas venting flue from above through the tile. Position the rainproof collar (A) until it bottoms on the cap of the tile for roofs (B) and fix it with the screw supplied. Keep the distance indicated in the figure between the rainproof collar and the terminal. Check that the flue is in a vertical position and fix it to the structure with collars or other fixing systems.
  • Page 50 Possible configuration of air intake and flue gas venting ducts 3.6.3 Type B23/B23P Boiler intended for connection to an existing flue system external to the boiler room. Combustion air is taken directly from the boiler room itself while flue gas is conveyed to the outside. The boiler is not to be fitted with anti-wind gust device;...
  • Page 51 Ø 100/60 mm and Ø 125/80 mm air/flue gas coaxial duct system 3.6.4 WARNING The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes appro- ved and supplied by the manufacturer. C13/C13X installation type KC 12 - KR 12 - KRB 12 •...
  • Page 52 C33/C33X installation type KC 12 - KR 12 - KRB 12 • Minimum permissible length of vertical coaxial pipes is 1 meter. • Maximum permissible length of Ø 100/60 mm vertical coaxial pipes is 9 meters. • Maximum permissible length of 125/80 mm vertical coaxial pipes is 30 meters. •...
  • Page 53 Air intake and flue gas venting via 80 mm split pipes 3.6.5 WARNING The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes appro- ved and supplied by the manufacturer. Installation types C43/C43X - C53 - C83 KC 12 - KR 12 - KRB 12 •...
  • Page 54 Air intake and flue gas venting via 60 mm split pipes 3.6.6 Installation types C43 - C53 - C83 KC/KR/KRB 12 - KC/KR/KRB 24 - KC/KR/KRB 28 - KC/KR/KRB 32 • Minimum permissible length of air intake pipe is 1 meter. •...

  • Page 55: Checking Combustion Efficiency

    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 enable the flue cleaning function, press the key and keep it pressed for 3 seconds. •...

  • Page 56: Connection To Gas Mains

    Connection to 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. DANGER Comply with installation standards enforced in the country where the boiler is installed which are considered as fully transcribed in this booklet.
  • Page 57 3.9.2 Prior 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 heat exchanger. For KC model, cold water and domestic hot water outlet must be connected to the boiler through 1/2” F and C fittings, respectively (see Fig.

  • Page 58: Connection To Electrical Mains

    3.10 Connection to electrical mains The 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.
  • Page 59 The fictitious ambient temperature is set With installed external probe, press +/- using +/- CH buttons that, with external CH buttons to set calculated ambient probe installed, no longer work to set the temperature. As soon as the button is heating water temperature (see Ope- will continue flashing released, icon...

  • Page 60: Room Temperature Installation

    3.13 Room temperature installation The boiler can be connected to sensor for room temperature measurement (supplied as standard). WARNING Only 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.

  • Page 61: Installation And Operation With Open Therm Remote Control (Optional)

    3.15 Installation and operation with Open Therm Remote Control (optional) WARNING Only use original Remote Control Units supplied by the manufacturer. The correct operation of the Remote Control itself and of the boiler is not guaranteed if non original Remote Control units not supplied by the manufacturer are used.

  • Page 62: Tsp Parameters

    3.16 TSP parameters The boiler operation is controlled by several parameters. To change the parameters, press at the same time for 3 seconds. Scroll through the parameters by pressing +/- CH buttons. Set onto the required one and press symbol turns on to indicate that you can edit the parameter value. The parameter value can be changed with the +/- HEATING buttons.
  • Page 63 Parameter Settable values Default values Notes P14 - TSP14 0 ÷ 1 0 = normal; 1 = solar Setting of "solar" DHW thermostats P15 - TSP15 0 ÷ 3 sec. Water hammer protection delay, configurable P16 - TSP16 0 ÷ 199 sec. Ambient thermostat reading delay / OT 0 = shut-down and fault P17 - TSP17...
  • Page 64 Parameter Settable values Default values Notes 0 = flow yemp. 1 = SA1 probe temp. 2 = SA2 probe temp. 0 ÷ 7 3 = external temp. Type of temperature visualization on display 4 = water heater temp. 5 = solar collector temp. 6 = solar valve temp.
  • Page 65 Parameter Settable values Default values Notes P18 - TSP18 0 = solar valve 0 ÷ 1 Solar plant type choice 1 = solar pump P19 - TSP19 10 ÷ 90 °C 60 °C Water heater set-point setting P20 - TSP20 1 ÷...
  • Page 66 Parameter Settable values Default values Notes only with external probe connected External temperature Flow temperature only with external probe connected Nominal calculated flow temperature only with at least one zone board connected Set point of zone 2 flow temperature only with at least one zone board connected Current zone 2 flow temperature only with two zone boards connected Set point of zone 3 flow temperature...

  • Page 67: Filling The System

    3.17 Filling the system Once 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. •...

  • Page 68: Available Head

    3.19 Available head The boiler is equipped with a high-efficiency circulation pump with variable speed. Circulation pump speed is automatically managed by the electronics, according to the settings of boiler parameters. It is possible to choose between two pump working modes: 1 “Constant ΔT”...
  • Page 69 Fig. 26 Available head KC-KR-KRB 24 Fig. 27 Available head KC-KR-KRB 28 Instructions for the installer...
  • Page 70 Fig. 28 Available head KC-KR-KRB 32 Q ... . Flow rate (l/h) H ... . Available head (mbar) (*) Minimum curve that can be used in systems without hydraulic separator (**) Minimum curve that can be used in systems with hydraulic separator Instructions for the installer...

  • Page 71: Wiring Diagrams

    3.20 Wiring diagrams 3.20.1 Wiring diagram KC 0CREMOTO04 ALARM PSOL SEXT S3S SBS SCS bn bn wh wh pk pk rd rd bu bu bk bk wh bk Conn_D Conn_F SF SR1 SR2 CN_J Conn_E CN_C CN_C CN_E CN_E Conn_C CN_H CN_H CN_B...
  • Page 72 Internal connections DK: ..pressure transducer FL: ... Flow meter SS: ... DHW NTC 'OUT' probe 10k Ohm a 25°C B=3435 S3S: .
  • Page 73 3.20.2 Wiring diagram for forced circulation solar system with combi boiler Parameter setting P03 : 1 P17 : 2 P18 : 1 Solar collector tempe- rature probe OUTDOOR TEMPE- RATURE PROBE Ambient thermostat Terminals 5 - 6 Terminals 1 - 2 Terminals 21 - 22 - 23 Terminals 11 - 12 0KITSOLC07...
  • Page 74 3.20.3 Wiring diagram for natural circulation solar system with combi boiler Parameter setting P03 : 1 P17 : 2 P18 : 0 OUTDOOR TEMPE- RATURE PROBE Ambient ther- mostat Terminals 5 - 6 Terminals 3 - 4 Terminals 21 - 22 - 23 SOLAR DEVIATING VALVE Solar water heater Terminals 9 - 10...
  • Page 75 3.20.4 Wiring diagram KR 0CREMOTO04 ALARM SEXT SBC SBS SCS SA1 SA2 PSOL bn bn wh wh pk pk rd rd bu bu bk bk wh bk wh rd bk Conn_D Conn_F SF SR1 SR2 CN_J Conn_E CN_C CN_C CN_E CN_E Conn_C CN_H...
  • Page 76 Internal connections DK: ..pressure transducer SRT: ..return NTC temperature probe 10k Ohm a 25°C B=3435 SR1-SR2: ..CH NTC temperature probe 10k Ohm a 25°C B=3435 SF: .
  • Page 77 3.20.5 Forced circulation solar system with CH only boiler wiring diagram Parameter setting P03 : 3 P17 : 2 P18 : 1 OUTDOOR TEMPE- RATURE PROBE Ambient thermostat Terminals 5 - 6 Terminals 1 - 2 Terminals 11 - 12 Terminals Terminals 7 - 8 21-22-23...
  • Page 78 3.20.6 Wiring diagram KRB 0CREMOTO04 ALARM SEXT SBC SBS SCS SA1 SA2 PSOL bn bn wh wh pk pk rd rd bu bu bk bk wh bk Conn_D Conn_F SF SR1 SR2 CN_J Conn_E CN_C CN_C CN_E CN_E Conn_C CN_H CN_H CN_B CN_B...
  • Page 79 Internal connections DK: ..pressure transducer SRT: ..return NTC temperature probe 10k Ohm a 25°C B=3435 SR1-SR2: ..CH NTC temperature probe 10k Ohm a 25°C B=3435 SF: .
  • Page 80 3.20.7 Solar collector freeze protection function Solar collector freeze protection is enabled by setting parameter P24 = 1. With this function, solar pump is activated as soon as solar collector probe detects a temperature of 4° C 3.20.8 Collector heat transfer function This function prevents that solar collectors in stagnation state are exposed to high thermal stresses.
  • Page 81 3.20.11 Multifunction relay setting diagrams The control panel features a multifunction relay, to be set through the parameter P17-TSP17 Solenoid valve, coupled to Remote Control Fig. 38 Relay with remote control and TA2 Solenoid valve with limit swich TA PUMP Fig.
  • Page 82 TA PUMP Fig. 40 Relay with TA2 request (P17 = 3) DIAGRAM PARAMETER SETTING (SOLAR PLANT EXCLUDED) Error signalling relay Relay controlled by TA1 or by the Remote Control Relay controlled by TA2 or by the interface Tab. 22 Parameter setting 3.20.12 Relationship between temperature and nominal resistance of all NTC probes (B=3435) T (°C) 27203...

  • Page 83: Adaptation To Other Gas Types And Burner Adjustment

    3.21 Adaptation to other gas types and burner adjustment WARNING This 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.
  • Page 84 3.21.2 Switching from PROPANE to NATURAL GAS • Disconnect the boiler from the electric power supply. • Remove boiler outer front panel. • Loosen the three screws securing combustion chamber front panel to frame, then remove panel. • Loosen the screw securing intake pipe to mixer, and remove pipe (see Fig. 41 Intake pipe). •...
  • Page 85 Fig. 43 Mixer plastic body Fig. 44 Assembling direction A. Gas valve B. Mixer C. Air intake D. Gas pipe E. O-ring F. Nozzles G. Venturi to mixer retaining screws H. Gas fitting I. Direction tab Instructions for the installer...
  • Page 86 3.21.3 Gas valve setting Maximum heating output adjustment • Make sure that the ambient thermostat (optional), if fitted, is set to ON. • Select the "heating" mode on the control panel pressing key n times until symbol is displayed. • Start the ‘flue cleaning’ function by keeping key pressed until symbol stops flashing.

  • Page 87: Testing The Boiler

    4. Testing the boiler Preliminary checks Before 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.

  • Page 88: Maintenance

    5. Maintenance WARNING Any maintenance (and repair) work must only be carried out by qualified personnel. WARNING A proper boiler routine maintenance is an essential requirement to ensure safety. The user is strongly advised to have the product serviced and repaired by a service centre or qualified personnel. WARNING Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.

  • Page 89: Combustion Analysis

    WARNING Should the device not operate correctly, while not posing danger to people, animals or property, or should you find any discrepancy with reference to prevailing standards and regulations, notify the system supervisor both verbally and in writing. WARNING The manufacturer shall not be held responsible for damage to people, animals, or property due to tampering with or im- proper intervention to the boiler or failed/insufficient maintenance.
  • Page 90 Ignition electrode and flame detection, inspection glass In case of operations involving removing and/or changing the ignition electrodes and/or inspection glass, all affected seals must be changed and sealing checked and ensured. Hydraulic components In case of operations involving removing and/or changing any hydraulic components, all affected seals must be changed and sealing checked and ensured to avoid water leakage.

  • Page 91: Decommissioning, Disassembly And Disposal

    6. Decommissioning, disassembly and disposal WARNING Gas boilers are electrical and electronic equipment (EEE) and when decommissioned they become waste electrical and electronic equipment (WEEE), therefore, they must be disposed of in compliance with the legislation in force in the count- ry of installation.
  • Page 92 7. Malfunctions, possible causes and solutions Troubleshooting BOILER STA- MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON- NEL'S TASKS Check gas supply. Gas supply failure. Check gas supply cock or gas network safety valve intervention. Contact qualified person- Gas valve is discon- Reconnect it.
  • Page 93 BOILER STA- MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON- NEL'S TASKS Fill the system (see section Boiler block). The system has been If the error occurs again several times, contact a quali- recently bled. fied Service Centre or qualified personnel. The system is leaking.
  • Page 94 BOILER STA- MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON- NEL'S TASKS Contact qualified person- Probe is disconnected. Reconnect it. E15** Return probe failure. Contact qualified person- Probe is faulty. Replace it. Contact qualified person- Probe is disconnected. Reconnect it. E24** Solar collector failure.
  • Page 95 BOILER STA- MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON- NEL'S TASKS Check that the P03 and Wrong boiler board or P18 parameter set values Contact qualified person- Solar system setting solar board setting para- match with those spe- error. cified on the reference meters.
  • Page 96 BOILER STA- MALFUNCTION PROBABLE CAUSE USER'S TASKS QUALIFIED PERSON- NEL'S TASKS Flue probe on heat Faulty flue temperature Contact qualified person- E89*** exchanger is faulty or Replace it. value. damaged. The max. number of re- Max. number of reset To reset the interface, disconnect boiler from power sets from the boiler inter- attempts from boiler mains.
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  • Page 100 Fax +39 0365 878 304 e-mail: info@fondital.it www.fondital.com The manufacturer reserves the right to modify his/her products as deemed necessary, without alte- ring the basic characteristics of the products themselves. Uff. Pubblicità Fondital IST 03 C 860 - 03 | Maggio 2019 (05/2019)

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