Fondital Nova Florida DELFIS CTFS 24 AF Didactic Manual
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Fondital Nova Florida DELFIS CTFS 24 AF Didactic Manual

Forced and natural draught instant boilers
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DIDACTIC MANUAL
Wall-Hung
FAMILY:
Atmospheric Boilers
Forced and Natural
GROUP:
Draught Instant
Boilers
MODELS:
Delfis-Antea
VERSION:
For indoor installation
PART NO.:
AST 14 C 259/00
______________________________________________
1st Edition, February 2013

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Summary of Contents for Fondital Nova Florida DELFIS CTFS 24 AF

  • Page 1 DIDACTIC MANUAL Wall-Hung FAMILY: Atmospheric Boilers Forced and Natural GROUP: Draught Instant Boilers MODELS: Delfis-Antea VERSION: For indoor installation PART NO.: AST 14 C 259/00 ______________________________________________ 1st Edition, February 2013...

  • Page 2: Table Of Contents

    Contents SECTION 1 TECHNICAL CHARACTERISTICS 1.1 – Models 1.2 – Overall Dimensions 1.3 – Technical Specifications ___________________Page SECTION 02 CONTROL PANEL AND DIAGNOSIS 2.1 – User's Interface 2.2 – LCD 2.3 – Boiler Status and Fault Codes ___________________Page SECTION 03 HYDRAULIC DIAGRAMS AND COMPONENTS 3.1 –...
  • Page 3 ________________________________________________________________________________ AST 14 C 259/00...

  • Page 4: Models

    SECT. 1 TECHNICAL CHARACTERISTICS 1.1 MODELS DELFIS-ANTEA CTFS 24 AF DELFIS-ANTEA CTN 24 AF ABBREVIATION KEY combined TFS : sealed chamber forced draught AF : still water (pump is not powered in DHW) TN : natural draught MAIN CHARACTERISTICS DELFIS-ANTEA CTFS 24 AF: DHW + CH combined boiler, forced draught, sealed chamber, still water, bi- thermal;...
  • Page 5 CTFS VERSION ________________________________________________________________________________ AST 14 C 259/00...
  • Page 6 CTN VERSION ________________________________________________________________________________ AST 14 C 259/00...
  • Page 7 INSTALLATION TEMPLATE ________________________________________________________________________________ AST 14 C 259/00...

  • Page 8: Technical Specifications

    1.3 TECHNICAL SPECIFICATIONS General Characteristics CTN 24 AF CTFS 24 AF Operating parameters Equipment category II2H3+ Number of burner nozzles n° Minimum CH flow rate CH circuit min. pressure CH circuit max. pressure DHW circuit min. pressure DHW circuit max. pressure DHW specific flow rate (∆t 30°C) l/min 10.3...
  • Page 9 Design data and flue duct sizing CTN 24 AF Load Pmax. Pmin. at 30% Casing heat loss 3.92 4.45 Flue system heat loss with burner on 5.98 8.15 Flue (methane gas) mass flow 16.72 14.98 Flue temp. – air temp. °C CO2 value (methane - propane - butane) 5.7 –...

  • Page 10: User's Interface

    SECT.2 CONTROL PANEL AND DIAGNOSIS 2.1 USER'S INTERFACE domestic water temperature These buttons are used to set (increase or decrease) the domestic hot water temperature within a range from 35°C to 50°C. 2. Recall information and confirm parameters This button is used to scroll the sequence values some...
  • Page 11 2.2 LCD a. DHW mode indicator Illuminates when the boiler is operating in DHW mode. Flashes when setting the DHW temperature with the buttons 1 (see previous paragraph). b. Parameter indicator Illuminates when the parameter programming mode is accessed (function reserved for installing technician) c.

  • Page 12: Boiler Status And Fault Codes

    2.3 BOILER STATUS AND FAULT CODES Normal operation Boiler in STAND-BY mode. Boiler in SUMMER mode No active function Flow temperature displayed Boiler in SUMMER or WINTER mode. No active function Flow temperature displayed Boiler in CENTRAL HEATING ONLY mode No active function Flow temperature displayed Boiler in SUMMER mode...
  • Page 13 Malfunction; shut-downs not resettable from boiler Boiler shut-down due to water pressure switch triggering Flow probe fault DHW probe fault Return probe fault Remote Control communication fault Boiler type detection error (CTFS or CTN) Gas/fan relay operator error Gas modulation coil fault Power supply voltage level too low Flow gradient too high Max.

  • Page 14: Hydraulic Diagrams

    SECT.3 HYDRAULIC DIAGRAMS AND COMPONENTS 3.1 HYDRAULIC DIAGRAMS 1. DHW temperature probe 14 Low water pressure switch 2. Modulating gas valve 15. 3 bar safety valve 3. CH temperature probe 16. Filler cock 4. Boiler nozzles 17. 10 l/min flow-limiting device 5.
  • Page 15 CTFS 1. DHW temperature probe 16 CH return temperature probe 2. Modulating gas valve 17. Expansion vessel 3. CH temperature probe 18. Circulation pump 4. Boiler nozzles 19. Filler cock 5. Boiler 20. Low water pressure switch 6. Ignition/detection electrode 21.

  • Page 16: Hydraulic Unit

    3.4 HYDRAULIC UNIT The arrangement of the hydraulic unit is one of the main factors that allowed to minimize boiler dimensions. All the parts in "contact" with water, such as 3 bar safety valve, low water pressure switch and fill cock unit (see picture below) were all indeed positioned inside circulation pump scroll.

  • Page 17: Bi-Thermal Heat Exchanger

    3.4 BI-THERMAL HEAT EXCHANGER Bi-thermal heat exchanger allows reducing consumption as well as waiting times during domestic hot water production, without any need of a plate heat exchanger It consists of two (inner and outer) copper circuits. The first one, oval-shaped, is to be used by the CH system only;...

  • Page 18: Expansion Vessel

    3.4 EXPANSION VESSEL An increase of the heating water inside a closed circuit corresponds to an increase of the water volume. As no further space is available, it will not be water volume - but pressure - to increase. If pressure value exceeds safety valve triggering point, this latter will open and discharge water from system.
  • Page 19 3.6 GAS VALVE Boiler is homologated to operate with the following valve models:  SIEMENS VGU 56 Min. pressure adjuster screw Max. pressure GAS OUT adjuster screw Pressure measurement Pressure measurement GAS IN  SIT 845 Min. pressure adjuster screw Max.
  • Page 20 Gas valve characteristics SIEMENS VGU 56 SIT 845 SV1 and SV2 safety coil operating power supply 230 VR AC 50_60 Hz 230 VAC 50 Hz SV1 operating current 38 mA 40 mA SV2 operating current 22 mA 12 mA SV1 supply pin 4 - 5 SV2 supply pin 4 - 1...

  • Page 21: Gas Valve Setting

    SECT.4 GAS SETTING AND TSP PARAMETERS 4.1 GAS VALVE SETTING To adjust gas valve, proceed as follows:  check mains static pressure by means of the inlet pressure measurement point E, referring to the "setting” table on page 8 (pressure values below the specified limits will not ensure boiler correct operation);...

  • Page 22: Flue Cleaning Function

    4.2 FLUE CLEANING FUNCTION The boiler features a flue cleaning function which must be used to measure combustion efficiency during operation and to set the burner. This function can be enabled only in the HEATING + DOMESTIC HOT WATER or HEATING ONLY operating modes.

  • Page 23: Tsp Parameters

    4.4 TSP PARAMETERS PCBs house a memory with a series of parameters (called TSP parameters) to be accessed for displaying purposes only, or to be edited for boiler perfect setting based on the system used. These parameters can be directly accessed from user's interface, or through the remote control.
  • Page 24 To confirm parameter value editing, press “OK”. Scroll the parameter list to edit other values, or press “reset” to quit the programming function. TSP parameter list Default Parameter Range Notes values P0 - TSP0 0 = methane 0 to 1 Fuel gas type 1 = LPG P1 - TSP1...
  • Page 25 P29 - TSP29 Fault code Boiler second last shut-down displaying P30 - TSP30 Fault code Boiler third last shut-down displaying P31 - TSP31 Fault code Boiler fourth last shut-down displaying P32 - TSP32 Fault code Boiler fifth last shut-down displaying P33 - TSP33 0 = OFF 0 to 1...

  • Page 26: Main General Characteristics

    SECT. 5 OPERATING LOGIC 5.1 MAIN GENERAL CHARACTERISTICS  Function priority;  Boiler type selection;  Automatic flame control;  Ignition with ignition ramping or with re-set power output;  DHW priority;  DHW modulation;  Ambient thermostat;  CH modulation; ...
  • Page 27 AUTOMATIC FLAME CONTROL. The device is always ON, continuously carrying out the self-check functions. Upon an operation request, after having checked that the air pressure switch (CTFS type) is in rest condition, fan will be powered. When air pressure switch (type C) or flue thermostat (type N) gives the consensus, device starts counting the waiting time TW (1.5 seconds) after which gas valve and igniter will be powered.
  • Page 28 IGNITION WITH IGNITION RAMPING OR WITH PRE-SET POWER OUTPUT Parameter P2 (default setting: 0) allows selecting boiler ignition mode: P2=0  Ramping ignition Upon every operation request entailing burner ignition, burner will be ignited with a current ramping to modulation coil from a starting value to the final one within 10 seconds.
  • Page 29 DHW PRIORITY With boiler running in “DHW” or “DHW + CH” mode, DHW flow switch electric contact closing will originate a DHW operation request, thus starting modulation. This request can be delayed through P7 parameter (3 seconds max.) to prevent any water hammer inconvenience.
  • Page 30 Modulation with P2≠0 During domestic hot water production, flow water temperature is always monitored and, once 90 °C are reached, flame control section consensus will be disabled. As soon as flow water temperature reaches 85 °C, flame control section will be enabled again. Modulation parameter summary: ...
  • Page 31 AMBIENT THERMOSTAT With the boiler set on the "CH" or "DHW + CH" operating mode, the closing up of ambient thermostat electric contact or the heat request by the remote control will result in a request during heating, thus making heating modulation start. CENTRAL HEATING MODULATION Due to ambient thermostat electric contact closing up, if the flow NTC probe water temperature reading is below the set value, the automatic flame control section consensus...
  • Page 32 Modulation with P2≠0 Modulation parameter summary:  CH temperature pre-selection range: 35 °C - 78 °C  CH thermostat triggering temperature OFF: set point + 5 °C  CH thermostat triggering temperature ON: set point + 0 °C  CH power ramping timer adjustable P4: default setting is 4 minutes...
  • Page 33 HEAT EXCHANGER BOILING CONTROL When the CH function is enabled only, flow rate value can be automatically edited (decreased) based on the temperature readings of flow and return NTC probes. If the differential value calculated by these probes is higher than the reference ∆t set through P9 parameter (default setting: 30 °C) prevents output complete release with a limited quantity of water inside heat exchanger, thus entailing heat exchanger boiling problems.
  • Page 34 BOILER FREEZE PROTECTION FUNCTION When flow water temperature reading drops below 5 °C, a freeze protection operation request will be developed, followed by burner turning on. At the end of the ignition sequence, the gas flow rate supplied to burner will be forced to heating min. value. The operation request during the freeze protection phase continues until flow water temperature reaches 30 °C or an operating time of 15' is reached.
  • Page 35 POST-VENTILATION FUNCTION. Only when boiler is working in "domestic hot water" mode, at the end of a request during DHW function, burner (if ON) will be turned off, while fan will continue to be powered for 1 minute (DHW post-ventilation timer). A second ventilation phase will be started as soon as flow water temperature or DHW temperature reaches 83 °C.
  • Page 36 TEMPERATURE PROBE WHOLENESS CHECK System checks the failure condition of the NTC probes connected to the integrated modulation board. The failure condition occurs when probe is not powered, or when it detects a temperature value outside probe correct operating range. ...
  • Page 37 SAFETY DEVICES Safety thermostat Safety thermostat positioned onto bi-thermal heat exchanger is a normally closed contact. When the water temperature value detected by thermostat is above 95 °C for CTFS models or above 105 °C for CTN models, contact opens thus cutting off gas valve power supply.
  • Page 38 Flue gas thermostat Flue thermostat, assembled on natural draught boilers only, is a normally closed contact, and opens when flue temperature reaches 70°C. It is assembled onto a side fin, and it is used to indicate if exhaust flue draught is correct. Gas valve will be powered off when contact is open and, 4 seconds after contact opening, board enters the "flue thermostat"...

  • Page 39: Electronic Board

    SECT. 6 ELECTRICAL SYSTEM 6.1 ELECTRONIC BOARD Spare part number: 6SCHEMOD20 Board characteristics Operating voltage: 170Vac to 300 Vac Power supply frequency: 45 – 66 Hz Protection class: IP00 Protection fuse: 5x20 2AF Ionization current: 1.2 µA Flame detection method: ionization Type of detection: phase-neutral...

  • Page 40: Wiring Diagram

    6.3 WIRING DIAGRAM Connecting wires to outer 1 2 3 4 terminal box Key: X1/X10: connectors heating probe NTC 10KOhm ignition/detection electrode DHW probe NTC 10KOhm circulation pump SRT: return probe NTC 10KOhm fan (CTFS only) flow switch flue thermostat (CTN only) gas valve flue gas pressure switch (CTFS only) limit thermostat...

  • Page 41: Natural Draught Boiler Vent Duct

    SECT. 7 VENT DUCTS AND TUBES For intake/flue venting gas systems, use original ducts suitable for this boiler, and recommended by the manufacturer. 7.1 NATURAL DRAUGHT BOILER VENT DUCT TYPE OF INSTALLATION PIPE DIAMETERS (mm) Ø 125 /130 Dimensions for connection of flue gas duct Connecting to the chimney With reduction unit ________________________________________________________________________________...

  • Page 42: 100/60 Co-Axial Air/Vent Ducts

    7.2 100/60 CO-AXIAL AIR/VENT DUCTS Dimensions for connection of flue gas duct to co-axial ducts Type C12 Type C12 horizontal vent duct The minimum permissible length of horizontal coaxial pipes is 1 metre, not counting the first elbow connected to the boiler. Maximum permissible length of horizontal coaxial pipes is 6 metres, not counting the first elbow connected to the boiler.
  • Page 43 Type C32 vertical vent duct Minimum permissible length for vertical coaxial pipes is one 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 must be reduced by 1 metre, while for 45°...

  • Page 44: 80/80 Split Air/Vent Ducts

    7.3 80/80 SPLIT AIR/VENT DUCTS Type C12 Type C12 - C32 - C42 – C52 – C82 AIR INTAKE Minimum permissible length of air intake pipe is 1 metre. Each wide radius 90° air-intake duct elbow (R=D) is equivalent to a 0.8 metre long straight pipe section.
  • Page 45 * the first vent elbow from the boiler is not to be accounted for Basic split kit 0SDOPPIA11: Air intake stub pipe Flue gas vent stub pipe Air diaphragm Neoprene gaskets WARNING: air diaphragm is supplied with the split kit. 80/80 split duct load loss table Part Vent...
  • Page 46 NOTES _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ ________________________________________________________________________________ AST 14 C 259/00...
  • Page 47 TABLE OF TECHNICAL FAULTS Boiler Status Malfunction Probable cause Solution Check gas pressure Check gas network Gas supply failure stopcock or gas network Burner does not ignite safety valve intervention Gas valve has disconnected Re-connect it Gas valve is faulty Replace it PCB is faulty Replace it...
  • Page 48 Low water inside heating Fill up system system Leaks in the CH system Check system Boiler shutdown; Water pressure switch is picture flashes: Re-connect it CH system water disconnected pressure is low Water pressure switch is not Replace it operating: it is faulty Boiler shutdown;...
  • Page 49 Boiler shut-down; the Connecting cable pictures flash one after between boiler and the other: Re-connect it remote control disconnected No communication with remote control Remote control faulty Replace it Boiler shut-down; the pictures flash one after the other: Boiler type detection error (CTN or CTFS) during the self check See causes related to...
  • Page 50 Boiler shut-down; the pictures flash one after the other: Power supply voltage Power supply voltage Check the electric plant below 190 V level too low Boiler shut-down; the Cut-off valves closed Check system pictures flash one after the other: Circulation pump Check the circulation Flow water arrested...
  • Page 52 FONDITAL GROUP Delfis-Antea Technic Manual Customer Service Department 1st edition, February 2013 AST 14 C 259 – 00...

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