Fondital ITACA RTFS 24 Manual 

Text of Fondital ITACA RTFS 24 User Guide:

• ________________________________________________________________________________ 92 AST 14 C 255/00 TABLE OF TECHNICAL FAULTS Boiler Status Malfunction Probable cause Solution Boiler shut-down, picture flashes: Burner does not ignite Gas supply fault Check gas pressure. Check gas supply cock or gas network safety valve inter

• ________________________________________________________________________________ 23 AST 14 C 255/00 The circulation pump end block features one 3-position selector to set the motor rotation speed and thus the head to the system. The circulating pump is the same for all output rates, what varies (depending on the hydraulic circuit of the boiler) is the

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 71 AST 14 C 255/00 CONFIGURATION 2: suitable for boilers with integrated water heater (P3=3), where the "complex" solar plant to be managed is designed for heating the solar storage in a forced circulation system through the pump PS with the option of transferring the excess solar energy to a secondary item through the deviating valve VM. Plant diagram is shown below: Water heater filling function (

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 15 AST 14 C 255/00 Boiler in SUMMER or WINTER mode with forced heating circuit in automatic mode. No active function. Flow water temperature, system pressure and current day and time are displayed. Boiler in SUMMER or WINTER mode with forced heating circuit in manual mode and “comfort” function enabled. DHW function active with flame lit. Hot domestic water temperature, burner output rate percentage and current time are displayed. Boiler in ONLY WINTER mode with forced heating circuit in automatic mode and “solar” function enabled. CH function active with

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 17 AST 14 C 255/00 Boiler shut-down due to DHW probe fault (only for CTFS version) (a) Automatic filling failed (only for CTFS version) System pressure too high Boiler shut-down due to boiler probe fault (RTFS combined with boiler) or DHW inlet probe (CTFS) (a) External probe fault (a) Solar collector probe fault (SCS) (a) Solar valve probe fault (SVS) (a) Solar water heating probe fault (SBS) (a) Remote cont

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 76 AST 14 C 255/00  Plate DHW probe (E06): fault: with a request in DHW mode, the burner is not activated (if it was ON it is switched OFF) and the pump is activated as long as the request persists. At the end of the request, if no other requests are present, the system performs a 30-second post-circulation cycle. This circulation occurs even without operating request. With operating request in heating, flow anti-freeze, or flue cleaning function, the standard management operations of the request

• ________________________________________________________________________________ 68 AST 14 C 255/00 (without external probe) according to the selected range. Parameter P39 displays the calculated flow temperature, whereas parameter P40 the current one detected by the boiler probe. NB: with heat requests from different zones at the same time, the boiler flow set-point correspo

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 40 AST 14 C 255/00 P24 Post-circulation time at the end of maintenance cycle 0 ÷ 180 sec 30 sec P25 Flame propagation time on TFS boiler with ramp enabled 0 to 4 s 2 P26 DHW water flow measurement 0 ÷ 2 2 0 = flow switch 1 = flowmeter 2 = automatic: mid- interface, flow switch, top interface: flowmeter P27 Gas valve modulation coil short-circuit control enable 0 ÷ 1 0 0 = disabled 1 = enabled P91 Boiler overtemperature control 0 ÷ 1 0 0 = double probe 1 = limit thermostat P92 Post-ventilation timer for TFS boilers a

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 39 AST 14 C 255/00 SUPER-TECHNICAL parameter list (code 1398) Parameter Range Default values Notes P0 Display of boiler type XYZ X = P0 technical parameters Y = P2 technical parameters Z = P18 technical parameters Boiler faults P1 Boiler last shut-down displaying Fault code P2 Boiler second last shut-down displaying Fault code P3 Boiler third last shut-down displaying Fault code P4 Boiler fourth last shut-down displaying Fault code P5 Boiler fifth last shut-down displaying Fault code P6 Shut-down display res

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 13 AST 14 C 255/00 Programming indicator It is displayed only in the automatic programming mode, indicating the possibility to edit the time slot of both the CH circuit and of the boiler. First alphanumeric indicator Alphanumeric values indicating the current time during standard operation, or the specific time during automatic programming of both the CH circuit and of the boiler. It indicates the fan speed (in rpm) during the “flue cleaning" function. Flue cleaning function indicator It flashes when the flue cleaning function is started (by pressing the reset key for three

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 16 AST 14 C 255/00 Malfunction, errors to be reset by user and self-resettable faults The display indicates the fault through the relevant error code (see following table). Some faults can be reset by pressing the "reset" key (r), some others are self-resettable (a) and reset only when the fault is resolved: Boiler shut-down due to missing flame (r) Boiler shut-down due to double flow probe triggering (r) Boiler shut-down due to air pressure s

• ________________________________________________________________________________ 9 AST 14 C 255/00 Settings RTFS - CTFS 24 Heat output Heat Output MIN-MAX Supply pressure Nozzle Diameter Burner pressure MIN-MAX (kW) (kW) (mbar) (mm) (mbar) Natural gas G20 25.5 11.1 – 23.7 20 1.35 3.2 – 12.2 butane gas G30 25.5 11.1 – 23.7 2

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 94 AST 14 C 255/00 Boiler shut-down, picture flashes: External probe is not working (error signalling occurs only when a heating request is active) Disconnected or faulty probe Reconnect or replace it Boiler shut-down, picture flashes: Solar collector probe SCS fault (connected to boiler board) Disconnected or faulty probe Reconnect or replace it Probe detects a value lying outside the admissible range Make sure the probe is of PT1000 type Boil

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 19 AST 14 C 255/00 SECT. 3 HYDRAULIC DIAGRAMS AND COMPONENTS 3.1 HYDRAULIC DIAGRAMS RTFS 1. Automatic by-pass 10. Pressure measurement point on flue gas duct 2. Modulation gas valve 11. Air intake and venting duct 3. Burner 12. Pressure measurement point on flue gas duct 4. Double flow probe 13. Expansion

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 50 AST 14 C 255/00 ADJUSTABLE HEATING MAXIMUM OUTPUT During operation in heating mode, the maximum output supplied to the burner is equal to the one set by parameter P7. This parameter represents the percentage (default 100%) of maximum admissible current supplied to the modulation coil (120 mA for natural gas and 170 mA for LPG). CH WITHOUT AMBIENT PROBES (P57=4) With the boiler set on the "DHW +

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 11 AST 14 C 255/00 0 = standard, 1 = LCD always on 2 = LCD + keys always on 1. Temperature selection or recall information This key enables switching from “day” to “night” temperature (and reverse) during the automatic programming of heating times. When not programming, this key enables to scroll in sequence the parameter values for displaying purposes only. 2. Programming key During standard operation, it is possible to switch from manual to automatic programming and reverse by pre

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 29 AST 14 C 255/00 SECT. 4 GAS SETTING AND PARAMETERS 4.1 GAS VALVE SETTING To set the gas valve, proceed as follows:  check supply static pressure by means of the inlet pressure measurement point E referring to the "setting" table on page 9, according to the type of fuel used (pressure values lower than requested do not guarantee proper boiler operation);  check that the heating maximum output set with the parameter P7 is 100% (to view or edit this parameter, refer to

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 45 AST 14 C 255/00 IGNITION WITH RAMP OR AT PRE-SET POWER Boiler ignition mode is selected with parameter P6 (default setting is 0): P6=0  Ignition with ramp Upon every operation request entailing burner ignition, burner will be ignited with a current ramp to modulation coil changing from the initial to the final value within 10 seconds. The initial value corresponds to the minimum current supplied to the modulation coil (30 mA for LPG and 20 mA for natural gas), whereas the final value is 80% of the maximum current (170 mA for LPG and 120 m

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 89 AST 14 C 255/00 7.2 80/80 SPLIT AIR/VENT DUCTS or C12 Type C12 - C32 - C42 – C52 – C82 24 kW flue gas vent diaphragms: Pipe length [m] Diaphragm diameter flue gas vent [mm] 1  L < 3 39.8 3  L < 14 42 14  L < 26 45 26  L < 34 49 34  L < 42 - supplied to 28 kW flue gas vent diaphragms: Pipe length [m] Diaphragm diameter flue gas vent [mm] 1  L  18 45 18 < L  23 47 For 32 kW flue gas vent diaphragms: Pipe length [m] Diaphragm diameter flue gas vent [mm] 1  L

• ________________________________________________________________________________ 49 AST 14 C 255/00 CH CONTROL The boiler electronics features a "timer" function for the weekly programming of heating times (automatic operation). This function can be used to manage separately up to two zones and the relevant signals are connected to the boiler board, which features two

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 81 AST 14 C 255/00 ANTI-LEGIONELLA FUNCTION (only for RTFS with water heater) The anti-legionella function is available in the boiler-version systems (P3=3) and is always enabled. This function is enabled whenever a time interval of 15 days elapses. Once such this time interval has run out, a boiler heating phase, having a fixed set-point of 65 °C and a maximum duration of 30 minutes, is started. The anti-legionella function has higher priority over any DHW, CH or anti-freeze mode that might be in progress when such function is activated. Warning: this function is performed only us

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 67 AST 14 C 255/00 The zone board is further supplied with a bi-colour LED with the following indications: - Green steady  pump enabled; - Red quick flashing  valve opening; - Red slow flashing  valve closing; - Green flashing  boards with no request; - Red flashing slow-slow (1s on, 1s off)  faulty communication with boiler board; - Red steady  zone 2 safety thermostat open; - Red steady + green steady  flow probe fault with error E36 on the boiler display; Zone setting The zones are s

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 10 AST 14 C 255/00 SECT. 2 TOUCH SCREEN CONTROL PANEL AND DIAGNOSTICS 2.1 USER'S INTERFACE The interface features a capacitive keyboard to access the setting by simply touching the keys on the interface key-area. This is the only way to enable back-lighting (keys + LCD) and access the various functions. Only "active" keys will be backlit, thus guiding the user to proper use. One minute after the last key has been touched, interface is disabled and back

• Fondital ITACA RTFS 24, ________________________________________________________________________________ 7 AST 14 C 255/00 1.3 TECHNICAL SPECIFICATIONS General Characteristics RTFS CTFS 24 kW 28 kW 24 kW 28 kW 32 kW Operating parameters Equipment category II2H3+ Burner nozzles no. 11 13 11 13 15 CH circuit max. and min. pressure bar 3 - 0.5 DHW circuit max. and min. pressure (KC) bar - 6 - 0.5 DHW specific flow rate t 30°C l/min - 11.6 14.2 15.1 Double flow probe triggering temperature OFF °C 105 Double flow probe triggering temperature ON °C 90

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Fondital ITACA RTFS 24 Installation, use and maintenance manual 19-03-2023 88

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