Fondital ANTEA KRB 12-24-28 Directions For Installation, Use And Maintenance
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Fondital ANTEA KRB 12-24-28 Directions For Installation, Use And Maintenance

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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.
ANTEA
KC 12-24-28
KR 12-24-28
KRB 12-24-28
EN
Translation of the
original instructions (in
Italian)

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  • Page 1 ANTEA KC 12-24-28 KR 12-24-28 KRB 12-24-28 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: Table Of Contents

    Instructions for the user ........... . . Control panel ................................
  • Page 7 Fig. 1 Control panel ..................Fig.
  • Page 8 Tab. 1 Adjustment specifications KC-KR-KRB 12..............Tab.

  • Page 9: Instructions For The User

    1. Instructions for the user Control panel rpmx10 Fig. 1 Control panel A. Domestic hot water settings (+/- HOT WATER). B. Parameter confirmation and information request. C. Operating status selection. D. Alarm reset and back to the starting page during parameter selection. E.
  • Page 10 Ref. Symbol Steady on Flashing Visualization of chimney sweep and Indicates that you are accessing the flue "rpmx10" (fan rounds number) indication. cleaning function. Displaying of the DHW temperature set- A DHW request is present point During parameter editing, the wrench symbol stays on until the set datum is confir- Not used med.

  • Page 11: Interpreting Boiler Status From Display Indications

    Interpreting boiler status from display indications 1.2.1 Normal operation Boiler in STANDBY mode Boiler in SUMMER mode No active function Flow temperature displayed Boiler in WINTER mode No active function Flow temperature displayed Boiler in CENTRAL HEATING ONLY mode No active function Flow temperature displayed Boiler in SUMMER mode Domestic hot water withdrawal...

  • Page 12: Boiler Operation

    Boiler operation 1.3.1 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 13 1.3.4 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 14 1.3.5.3 Water heater freeze protection function (for models KR/KRB with external water heater). The water cylinder probe measures the temperature of water in the cylinder. When this temperature is less than 5°C a water heater frost protection function begins: the circulating pump begins working and the burner is switched on. On KR/KRB models with external water cylinder (optional) with NTC probe (10 kΩ...

  • Page 15: Boiler Shut-Down

    1.3.10 Operation with (optional) remote control The boiler can also be connected to a Remote Control (optional - not compulsory, supplied by the manufacturer) so as to manage several boiler parameters, such as: • boiler status selection. • ambient temperature selection. •...
  • Page 16 1.4.4 Shut-down due to low water pressure Fault 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 - (A*) option). Water pressure must be 1÷1.3 bars while the boiler is cold.

  • Page 17: Maintenance

    1.4.7 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 18: 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 19 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 20: Dimensions

    Dimensions KC model 152,5 Fig. 3 Model KC dimensions RUGIADA PLUS NB CDX CH system flow (3/4”) DHW outlet (1/2") 3-bar safety valve discharge outlet Gas inlet (1/2”) Cold water inlet (1/2") CH system return (3/4”) Technical features and dimensions...
  • Page 21 KR model 152,5 Fig. 4 Model KR dimensions RUGIADA PLUS NB CDX CH system flow (3/4”) 3-bar safety valve discharge outlet Gas inlet (1/2”) Cold water inlet (1/2") CH system return (3/4”) Technical features and dimensions...
  • Page 22 KRB model 152,5 Fig. 5 Model KRB dimensions RUGIADA PLUS NB CDX CH system flow (3/4”) Water heater secondary flow (1/2") 3-bar safety valve discharge outlet Gas inlet (1/2”) Water heater secundary return (1/2") CH system return (3/4”) Technical features and dimensions...

  • Page 23: Boiler Layouts

    Boiler layouts KC model Condensate drain CH system flow DHW outlet Gas inlet Cold water inlet 26 25 24 CH system return Fig. 6 Model KC wiring diagram 1. Condensate trap 15. Return temperature probe 2. Modulating gas valve 16. 3-bar safety valve 3.
  • Page 24 KR model Condensate drain CH system flow Gas inlet Cold water inlet CH system return Fig. 7 Model KR wiring diagram 1. Condensate trap 12. Ignition/detection electrode 2. Modulating gas valve 13. Expansion vessel 3. Flow temperature twin probe 14. Fan check probe 4.
  • Page 25 KRB model Condensate drain CH system flow Water heater flow RB R Gas inlet Return from the water heater CH system return Fig. 8 Model KRB wiring diagram 1. Condensate trap 13. Expansion vessel 2. Modulating gas valve 14. Fan check probe 3.

  • Page 26: 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 WARNING The boiler is suitable for the use of group H and/or group E fuel gases and mixtures of natural gas and hydrogen up to 20% by volume.

  • Page 27: General Characteristics

    General characteristics Description KC 12 KC 24 KC 28 CH nominal heat input 12,0 23,7 26,4 Minimum heat input CH nominal heat input with mixture 20%H2NG (Qn 11,4 22,4 25,0 (20%H2) CH minimum heat input with mixture 20%H2NG Maximum heat output (80-60°C) - CH 11,7 22,8 25,5...
  • Page 28 Description KR/KRB 12 KR/KRB 24 KR/KRB 28 CH nominal heat input 12,0 23,7 26,4 Minimum heat input CH nominal heat input with mixture 20%H2NG (Qn 11,4 22,4 25,0 (20%H2) CH minimum heat input with mixture 20%H2NG Maximum heat output (80-60°C) - CH 11,7 22,8 25,5...
  • Page 29 Description Max. output Min. output 30% load Casing heat loss with burner on 0,26 7,78 Casing heat loss with burner off 0,55 Flue system heat loss with burner on 2,64 1,92 Flue system mass capacity 8,25 0,89 Flue temp. – air temp. °C 57,9 34,5...

  • Page 30: Erp And Labelling Data

    Annual fuel consumption 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 31 Sound power level, indoors 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 32: 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 33 DE GB GR RO CZ HU TR Uscita acqua Salida agua Вихід Izlaz tople სცწ Sortie eau Wyjście ciepłej Saída de água Uitgang warm Έξοδο θερ ού Ieşire apăcaldă calda caliente Выход ГВС (Auslauf Sıcak çıkış su гарячої sanitarne Výstup TPV HMV csatlakozás chaude sanitaire wody użytkowej...

  • Page 34: 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 35: 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 36 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 37 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 38 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 39 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 40 3.6.3 Possible configuration of air intake and flue gas venting ducts 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 41 3.6.4 Ø 100/60 mm and Ø 125/80 mm air/flue gas coaxial duct system 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-KR-KRB 12 •...
  • Page 42 C33/C33X installation type KC-KR-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 43 3.6.5 Air intake and flue gas venting via 80 mm split pipes 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/C53X - C83/C83X KC-KR-KRB 12 •...

  • Page 44: Checking Combustion Efficiency

    3.6.6 Air intake and flue gas venting via 60 mm split pipes 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/C53X - C83/C83X KC-KR-KRB 12-24-28 •...

  • Page 45: 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 46 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 pump and the heat exchanger. Model KC Cold water inlet and DHW outlet shall be connected to the boiler through the dedicated 1/2" F and C fittings. Hardness of water supplied to the boiler may increase the plate heat exchanger cleaning/replacement intervals.

  • Page 47: 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 48: Selecting The Operating Range In Heating Mode

    For complete instructions on how to program the Remote Control, refer to the instruction manual included in the Remote Control kit. Board and Remote Control communicate in each operating mode: OFF, SUMMER, WINTER, CH ONLY. Boiler display layout corresponds to the setting made from the Remote Control, as for the operating mode. The remote control may be used to view and set a number of special parameters denominated TSP parameters and reserved solely for qualified technicians.
  • Page 49 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: •...

  • Page 50: Tsp Parameters

    3.15 TSP parameters The boiler operation is controlled by several parameters. To change parameters, press the Reset and - HEATING buttons together for 3 seconds. Scroll through the parameters by pressing +/- CH buttons. As soon as you reach the one to be modified, press ok. symbol turns on to indicate that you can edit the parameter value.
  • Page 51 Parameter Settable values Default values Notes P16 - TSP16 0 ÷ 199 sec. Ambient thermostat/remote control reading delay 0 = shut-down and fault P17 - TSP17 1 = requested by the ambient thermostat 1/ 0, 1, 3 Remote Control Multifunction relay setting 3 = ambient thermostat 2 request P27 - TSP27 P10 <...
  • Page 52 Parameter Settable values Default values Notes Fault code Display of most recent boiler shutdown/fault Fault code Display of second last boiler shutdown/fault Fault code Display of third last boiler shutdown/fault Fault code Display of fourth last boiler shutdown/fault Fault code Display of fifth last boiler shutdown/fault Number of faults since last reset Board use month displaying...
  • Page 53 Parameter Settable values Default values Notes 0 = standard function 0 ÷ 1 Multifunction relay forcing 1 = relay energised 0 = standard function 0 ÷ 1 Zone 2 pump relay forcing 1 = relay energised 0 = standard function 0 ÷...

  • Page 54: Filling The System

    3.16 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 55: Available Head

    3.18 Available head The boiler is equipped with a high-efficiency circulation pump with variable speed. Circulation pump speed is automatically managed by the electronics, based on the settings of "super technical" parameters of the boiler. It is possible to choose between two pump working modes: 1 “Constant ΔT”...
  • Page 56 100% 70% (*) 35% (**) 1000 1200 Fig. 25 Available head KC-KR-KRB 24 100% 70% (*) 34% (**) 1000 1200 Fig. 26 Available head KC-KR-KRB 28 Q ... . Flow rate (l/h) H .

  • Page 57: Wiring Diagrams

    3.19 Wiring diagrams ALARM Remote Control SEXT 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CN_C CN_C CN_E CN_E CN_H CN_H CN_B CN_B CN_J CN_A CN_A CN_D CN_D CN_M ACC1 CN_L CN_L...
  • Page 58 ALARM SEXT SBC Remote Control 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SF SM1 SM2 CN_C CN_C CN_E CN_E CN_H CN_H CN_B CN_B CN_J CN_A CN_A CN_D CN_D CN_M ACC1...
  • Page 59 ALARM SEXT SBC Remote Control 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SF SM1 SM2 CN_C CN_C CN_E CN_E CN_H CN_H CN_B CN_B CN_J CN_A CN_A CN_D CN_D CN_M ACC1...
  • Page 60 Internal connections DK: ..low water pressure swich FL: ... flow switch SS: ... DHW NTC 'OUT' probe 10k Ohm a 25°C B=3435 SRT: .

  • Page 61: Adaptation To Other Gas Types And Burner Adjustment

    3.20 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 62 Fig. 32 Mixer plastic body Fig. 33 Assembling direction A. Gas valve F. Nozzles B. Mixer G. Venturi to mixer retaining screws C. Air intake H. Gas fitting D. Gas pipe I. Direction tab E. O-ring 3.20.1 Edit parameter P0-TSP0 The boiler operation is controlled by several parameters.
  • Page 63 3.20.2 Gas valve setting WARNING In the case of a boiler connected to a gas distribution network that could receive a methane-hydrogen mixture of up to 20% (20%H2NG) see paragraph Mains gas valve setting 20%H2NG on page 64. WARNING The adjustments described below must be carried out without removing the front combustion chamber closing panel. Maximum heating output adjustment •...
  • Page 64 3.20.3 Mains gas valve setting 20%H2NG WARNING In the case of a boiler connected to gas distribution mains, which could receive a methane-hydrogen mixture of up to 20% (20%H2NG), a combustion analyser with direct oxygen measurement must be used, regularly calibrated, and the adjustment must be made using the O and offset pressure values as a reference.
  • Page 65 -x Pa Fig. 35 Offset pressure adjustment Offset pressure value value Supply pres- Diaphragm maxi- Qmin sure diameter mum value Model Fuel Qmax Qmin Lower Upper [mbar] [mm] [ppm] limit limit [Pa] [Pa] Natural gas G20 12 kW 4,9 ± 0,5 4,4 ±...

  • Page 66: 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 67: 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 68: 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 69 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 70: 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 71: Malfunctions, Possible Causes And Solutions

    7. Malfunctions, possible causes and solutions Troubleshooting BOILER STA- MALFUNCTION PROBABLE CAUSE User's tasks Qualified personnel's tasks Check gas supply. Gas supply failure. Check gas supply cock opening or gas network safety valve intervention. Gas valve is discon- Contact qualified person- Reconnect it.
  • Page 72 BOILER STA- MALFUNCTION PROBABLE CAUSE User's tasks Qualified personnel's tasks Flue gas exhaust pressu- Contact qualified person- Check pressure switch: re switch is faulty replace it if faulty. The silicone pipes are di- Contact qualified person- Connect or replace silico- sconnected or damaged.
  • Page 73 BOILER STA- MALFUNCTION PROBABLE CAUSE User's tasks Qualified personnel's tasks The Remote Control is Contact qualified person- not connected to boiler Reconnect it. board. Remote Control connec- E31** tion failure (only shown on Contact qualified person- Remote control faulty. Replace it. Remote Control display).
  • Page 74 BOILER STA- MALFUNCTION PROBABLE CAUSE User's tasks Qualified personnel's tasks Flow and/or return probes Contact qualified person- Replace them. are faulty. Contact qualified person- Remove any obstructions, Obstructed bypass pipe or replace the pipe. The ∆T between flow and E80* return is not within the The bypass valve is not Contact qualified person-...
  • Page 75 Page left intentionally blank...
  • Page 76 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 altering the basic characteristics of the products themselves. Uff. Pubblicità Fondital IST 03 C 1711 - 01 | Aprile 2024 (04/2024)

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