Fondital GIAVA KRB 12 Installation, Use And Maintenance Handbook
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Fondital GIAVA KRB 12 Installation, Use And Maintenance Handbook

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GIAVA
KRB 12 - 24 - 28 - 32
INSTALLATION, USE AND MAINTENANCE
EN

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Summary of Contents for Fondital GIAVA KRB 12

  • Page 1 GIAVA KRB 12 - 24 - 28 - 32 INSTALLATION, USE AND MAINTENANCE...

  • Page 2: Warnings

    Dear Sirs, Thank You for choosing and buying one of our boilers. Please read these instructions carefully in order to properly install, operate, and maintain the equipment. We inform users that: • boilers shall be installed by an authorised company in full compliance with the prevailing standards; •...

  • Page 3: General Notes For Installers, Maintenance Technicians, And Users

    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: Rapid Operating Instructions

    Rapid operating instructions The following instructions will help you to switch the boiler on quickly and regulate it for immediate use. It is presumed that the boiler has been installed by a qualified installer, it has been commissioned and is ready to operate correctly. If any accessories have been fitted on the boiler, these instructions will not cover them.

  • Page 5: Table Of Contents

    CONTENTS Warnings ........................................page 2 General notes for installers, maintenance technicians, and users ......................page 3 Rapid operating instructions ..................................page 4 1. Instructions for the user ..................................page 7 1.1. Control panel..............................................page 7 1.2. Interpreting BOILER STATUS from LCD DISPLAY INDICATIONS ............................page 9 1.3.
  • Page 6 4. Testing the boiler ..................................... page 62 4.1. Preliminary checks............................................page 62 4.2. Switching on and switching off ........................................page 62 5. Maintenance ......................................page 63 5.1. Maintenance schedule ............................................ page 63 5.2. Combustion analysis ............................................page 63 6. Troubleshooting ...................................... page 64 FIGURE INDEX fig.

  • Page 7: Instructions For The User

    INSTRUCTIONS FOR THE USER 1.1. Control panel fig. 1 A. Temperature selection (day/night) and recall information. B. Weekly programme for temperature zones and manual programme selection. C. Time and ambient temperature setting. D. DHW water temperature setting (see paragraphs 1.3., 1.4., 1.5., 1.14.3). E.
  • Page 8 SYMBOL STEADY FLASHING Indication of "parameter" inside the parameter menu. Displaying of the number of parameters, or of the system pressure, or of the burner power percentage. Indication of the temperatures, parameter values, faults and shut-downs. CH water temperature adjustment Boiler is working in CH mode.

  • Page 9: Interpreting Boiler Status From Lcd Display Indications

    1.2. Interpreting BOILER STATUS from LCD DISPLAY INDICATIONS Normal operation Boiler switch in OFF mode Boiler switch in SUMMER or WINTER mode or CH ONLY No active function The flow temperature and the heating system pressure are displayed. SUMMER WINTER CENTRAL HEATING ONLY Boiler switch in SUMMER or WINTER mode...
  • Page 10 Malfunction No flame Triggering of double flow probe Triggering of flue gas thermostat Insufficient system pressure Flow probe failure Flue probe failure Too high system pressure Water heater probe failure Return probe failure Remote Control connection failure (only shown on Remote Control panel) Triggering of safety thermostat in mixed zone 2 Flow probe failure in mixed zone 2 Flow probe failure in mixed zone 3...
  • Page 11 Communication error between main board and interface board Shut-down due to safety circuit hardware fault Incompatibility between boiler board and interface board Offset error ∆T max Flow or return probe > 120°C Maximum flow derivative exceeded Maximum return derivative exceeded Flue gas temperature lower than heating return temperature Flue gas maximum threshold exceeded Flue gas maximum derivative exceeding alarm...

  • Page 12: Comfort" Enable/Disable Function

    1.3. "Comfort" enable/disable function This function keeps the water heater hot ignoring the existing water heater heating programming, if any (par. 1.10). When the "COMFORT" icon (6, fig. 1) is on, the function is enabled. When it is off the function is disabled and the boiler follows the set water heater hour programming. If “COMFORT”...

  • Page 13: Selecting The Operating Mode

    1.4. Selecting the operating mode Whenever button is pressed, the "SUMMER” , “WINTER” , “CH ONLY” , “OFF” modes are enabled in sequence. At this stage, all buttons are enabled. When the "SUMMER" mode is enabled, only the DHW production function is active. When the "CH ONLY"...

  • Page 14: Adjusting Ch And Dhw Temperature

    1.5. Adjusting CH and DHW temperature Press the "DHW + and -" button (D, fig.1) to select the desired domestic hot water temperature (refer to paragraph 1.14.3). During selection, DHW icon (5, fig. 1) will flash. As soon as button is released, icon will continue flashing for approx. 3 seconds, and temperature value will flash as well. After this time, value is stored and display standard operation will be restored.

  • Page 15: Time Setting

    1.6. Time setting 1- To set time, minutes and day 2- Flashing values can be of the week, press “set”. edited by pressing “CH + and -” buttons. Press "ok" to confirm the edited value and shift to next parameter, press "reset" to quit the function and go back to starting page.

  • Page 16: Day Temperature" And "Night Temperature" Setting

    1.7. "Day temperature" and "night temperature" setting When one or more ambient probes are connected to boiler electronic board, two levels of 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. "Day"...

  • Page 17: Manual Programme Setting

    1.8. "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. The water heater on the other side, is heated according to the specific programme. 1- Press “prog”...

  • Page 18: Ch And Water Heater Programme Mode

    1.10. CH and water heater programme mode To access zone 1 CH programme displaying or editing, press "prog" button twice. 1- The display shows zone 2- Press “ok” to access zone 1 symbol flashing, sun or programming function. "Prog" moon symbols, bars on or off, wording starts flashing together respectively, at 00:00.

  • Page 19: Parameter Display

    1.11. Parameter display Press “Info” (A, fig. 1) to scroll the different parameter values. You can quit this function at any time by simply pressing the "Reset" button. Paragraph 3.2.14 describes the meaning of all parameters. PARAMETERS DESCRIPTION P30 - TSP30 External temperature displaying (if an external probe is present).

  • Page 20: Failures That Cannot Be Reset

    1.12. Failures that cannot be reset The display shows the failure based on the corresponding error code (see paragraph 1.2). Some failures can be reset through the reset key, while some others are self-resettable. Refer to the following paragraph (“Resume boiler function”). If failures cannot be reset but are of the self-resettable type, no key will be enabled and only the LCD back-lighting will be on.

  • Page 21: Boiler Operation

    1.14. Boiler operation 1.14.1. Switching on 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 stop cock; - turn the master switch installed ahead of the boiler ON. The display turns on and indicates the function currently active (see tables 1 and 2); - select boiler operating mode pressing “Operating mode selection”...

  • Page 22: 1.14.4.1. Ambient Probe Freeze Protection Function

    Operation with (optional) remote control Boiler interface includes all the possible functions of a Fondital Remote Control, and can control up to two heating zones. User can also connect the boiler to a Remote Control (optional - not compulsory, supplied by the manufacturer) so as to manage several boiler parameters, such as: - boiler status selection;...

  • Page 23: Boiler Shut-Down

    1.15. Boiler shut-down The boiler shuts down automatically if a malfunction occurs. Refer to Tables 1 and 2 to identify the boiler operating mode. To determine the possible causes of malfunction, see also paragraph 6. The troubleshooting section is at the end of this manual. Below is a list of kinds of shut-down and the procedure to follow in each.

  • Page 24: Shut-Down For Fan Malfunction

    1.15.4. Shut-down for fan malfunction The fan operation is constantly monitored and in case of malfunction the burner goes off; the code E40 flashes on the display. This mode is maintained until the fan recovers normal working parameters. If the boiler does not start and remains in this mode, contact a Service Centre or a qualified service engineer. 1.15.5.

  • Page 25: Technical Features And Dimensions

    TECHNICAL FEATURES AND DIMENSIONS 2.1. Technical features The boiler is equipped with a built-in fully pre-mixed gas burner, condensing heat exchanger and single coil water heater. The following models are available: - KRB 12 - Condensing boiler with single coil water heater, 12 kW heat input. - KRB 24 - Condensing boiler with single coil water heater, 23.7 kW heat input.
  • Page 26 Operating features - CH electronic flame modulation with timer-controlled rising ramp (60 seconds, adjustable); - Electronic flame modulation in DHW mode; - DHW priority function; - 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: ON 5°C;...

  • Page 27: Dimensions

    2.2. Dimensions FRONT VIEW RH SIDE VIEW Opening for hydraulic connections (see figures 4, 5, 6) TOP VIEW REAR VIEW 1783 (A) 1718 (B) 1653 (C) 1588 (D) 1523 (E) 1458 (F) 1393 (G) 1328 (H) 1263 (I) 1133 (L) 1071 (M) Connessione Descrizione...
  • Page 28 HYDRAULIC CONNECTIONS CH FLOW (3/4") (A) CH RETURN (3/4") (B) GIAVA KRB GAS (1/2”) (D) DHW OUTLET (3/4”) (I) COLD WATER INLET (1/2") (L) fig. 4 HYDRAULIC CONNECTIONS HIGH-TEMPERATURE CH FLOW ZONE 1 (3/4”) (A) GIAVA KRB V LOW-TEMPERATURE CH FLOW ZONE 2 (3/4”) (C) GAS (1/2”) (D) HIGH-TEMPERATURE CH RETURN ZONE 1 (3/4”) (E) LOW-TEMPERATURE CH RETURN ZONE 2 (3/4”) (F)

  • Page 29: Key Components

    2.3. Key components Ref. no. Description Water heater protective anode DHW expansion vessel Motorised 3-way deviating heating valve Gas valve Condensate trap Modulating fan Pre-mixed burner Flue gas discharge tower 10 litre CH expansion vessel CH pump 130-litre water heater DHW 6-bar safety valve System discharge cock Zone 1 high-temperature pump...
  • Page 30 Ref. no. Description CH system filler cock Hydraulic separator fig. 8...

  • Page 31: Boiler Operating Layout

    2.4. Boiler operation layout 8 SB RECIRCULATION (OPTIONAL) WATER HEATER HYDRAULIC SEPARATOR DOMESTIC WATER SYSTEM HIGH TEMPERATURE 1 TEMPERATURE 2 TEMPERATURE 3 V VERSION Z VERSION Ref. Description Ref. Description Double CH flow probe CH circulation pump Three-way motorised deviating valve CH system discharge cocks Automatic gas purging device CH return probe...

  • Page 32: Operating Data

    2.5. Operating data Burner pressures reported in the following page must be verified after the boiler has been operating for 3 minutes. KRB 12 values Gas mains Diaphragm heat output heat output max. Nozzle of the flue heat output Type of gas pressure diameter (80-60°C)

  • Page 33: General Characteristics

    2.6. General Characteristics KRB 12 KRB 24 KRB 28 KRB 32 Device category II2H3P II2H3P II2H3P II2H3P CH system max. and min. pressure 3.0 - 0.5 3.0 - 0.5 3.0 - 0.5 3.0 - 0.5 DHW system max. and min. pressure 6.0 - 0.5 6.0 - 0.5 6.0 - 0.5...

  • Page 34: Ch Circulation Pump Available Head

    KRB 24 Max. output Min. output 30% load Casing heat loss with burner on 0.44 Casing heat loss with burner off 0.21 Flue system heat loss with burner on 2.72 2.02 Flue system mass capacity 12.43 1.33 Flue gas temp. – air temp °C Maximum heat output efficiency rating (60/80°C) 96.8...
  • Page 35 KRB MODEL 24 V1 Pump speed I V2 Pump speed II V3 Pump speed III 1000 1200 Flow rate (l/h) fig. 11 KRB MODEL 28 V1 Pump speed I V2 Pump speed II V3 Pump speed III 1000 1200 1400 Flow rate (l/h) fig.

  • Page 36: Low And High Temperature Circulation Pump Available Head (V Versions)

    2.8. Low and high temperature circulation pump available head (V versions) HIGH-TEMPERATURE CIRCULATION PUMP HEAD V1 Pump speed I V2 Pump speed II 1000 1200 1400 V3 Pump speed III Flow rate (l/h) fig. 14 LOW-TEMPERATURE CIRCULATION PUMP HEAD V1 Pump speed I V2 Pump speed II 1000 1200...
  • Page 37 ZONE 1 LOW-TEMPERATURE CIRCULATION PUMP HEAD V1 Pump speed I V2 Pump speed II 1000 1200 1400 V3 Pump speed III Flow rate (l/h) fig. 17 ZONE 2 LOW-TEMPERATURE CIRCULATION PUMP HEAD V1 Pump speed I V2 Pump speed II 1000 1200 1400...

  • Page 38: Instructions For The Installer

    INSTRUCTIONS FOR THE INSTALLER 3.1. Installation standards This is an II2H3P category boiler and must be installed in compliance with the laws and standards in force in the country of installation, which are herein considered as entirely transcribed. 3.2. Installation Accessories and spare parts for installation and service procedures are to be supplied by the Manufacturer.

  • Page 39: Boiler Room Ventilation

    3.2.4. Boiler room ventilation The 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. The boiler must be installed in a room that is compliant with the legislation and standards in force in the country of installation, which are herein considered as entirely transcribed.

  • Page 40: Configuration Of Air Intake And Flue Gas Venting Ducts: B23, B53, C13, C33, C43, C53, C83

    3.2.5.1. Configuration of air intake and flue gas venting ducts: B23, B53, C13, C33, C43, C53, C83 The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes approved and supplied by the manufacturer. B23 installation type Boiler intended for connection to an existing flue system external to the boiler room.
  • Page 41 24 kW Minimum permissible length of horizontal coaxial pipes is 1 meter. Maximum permissible length of Ø100/60 mm horizontal coaxial pipes is 10 meters. Maximum permissible length of Ø125/80 mm horizontal coaxial pipes is 30 meters. For each additional 1 meter of straight pipe maximum permissible length is to be reduced by 1 meter. For each additional 90°...

  • Page 42: Air Intake And Flue Gas Venting Via 80 Mm Split Pipes

    Blanking cap Gasket fig. 19 fig. 20 The illustrations are indicative only. When installing accessories, refer to the instructions supplied with the accessories themselves. 3.2.5.3. Air intake and flue gas venting via Ø 80 mm split pipes The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes approved and supplied by the manufacturer.

  • Page 43: Air Intake And Flue Gas Venting Via 60 Mm Split Pipes

    32 kW Minimum permissible length of air intake pipe is 1 meter. Minimum permissible length of flue gas venting pipe is 1 meter. Maximum permissible length of intake/flue gas venting pipes is 78 meters (combined length of air intake and flue gas venting pipe). For each additional 1 meter of straight pipe maximum permissible length is to be reduced by 1 meter.

  • Page 44: Checking Combustion Efficiency

    3.2.6. Checking combustion efficiency 3.2.6.1. 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 "reset" key and it keep it pressed for about three seconds. If the "reset"...

  • Page 45: Connection To Gas Mains

    3.2.7. Connection to gas mains Gas supply pipe cross-section must be equal or greater than boiler gas pipe. Cross-section gas pipe size depends on its length, layout pattern, gas flow rate. Gas pipe size is to be selected accordingly. connection Comply with installation standards enforced in the country where the boiler is installed which are considered as fully transcribed in this booklet.

  • Page 46: Connection To The Electrical Mains

    CONDENSATE DRAIN Comply with condensate drain laws and standards applicable in the country of installation, which are considered herein integrally transcribed. Unless forbidden, the condensate produced by combustion is to be routed (via the condensate drain in fig. 26) through a discharge system connected to the domestic sewer, which due to its basicity, counteracts flue gas condensate acidity.

  • Page 47: Connection To (Optional) Ambient Thermostat

    3.2.11. Connection to (optional) ambient thermostat 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 5 mA at 24 Vdc. Ambient thermostat cables shall be connected to electronic board pins 1 and 2 (fig. 28, 29 and 30), after having eliminated the jumper supplied as a standard with the boiler.

  • Page 48: Connection To The (Optional) External Probe And Sliding Temperature Operation

    3.2.13. Connection to the external probe (optional) and “sliding temperature” operation The boiler can be connected to an external temperature probe (optional - not compulsory) for sliding temperature operation. Only 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 guaranteed.
  • Page 49 Figure 27 shows the curves for a calculated ambient temperature of 20°C. Parameter P10 allows selecting the curve value shown in fig. 27. If calculated ambient temperature value is edited on boiler display, the curves shift up or down, respectively, by the same amount. With a calculated ambient temperature setting of 20°C, for example, if you select the curve corresponding to parameter 1 and the outdoor temperature is - 4°C, the CH flow temperature will be 50°C.

  • Page 50: Tsp Parameters That Can Be Set From Interface Or Remote Control

    3.2.14. TSP parameters that can be set from interface or Remote Control Parameter Settable values Default values Notes 0 = 12 kW Methane gas; 1 = 24 kW Methane gas; P0 - TSP0 According to the 2 = 28 kW Methane gas; 3 = 24 kW Propane gas; 0 ÷...
  • Page 51 Flue gas temperature only with connected ambient probe Ambient probe SA1 temperature only with connected ambient probe Ambient probe SA2 temperature 0.0 ÷ 1.0 °C 0.0 °C only with connected ambient probe SA1 ambient probe triggering differential OFF -1.0 ÷ -0.1 °C -0.5 °C only with connected ambient probe SA1 ambient probe triggering differential ON...

  • Page 52: Filling The System

    3.3. Filling the system Once all boiler connections have been completed, CH system can be filled. 3.3.1. Filling the heating system The procedure is to be cautiously carried out, following each step: - open the air purging 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;...

  • Page 53: Connection Wiring Diagrams

    3.5. Connection wiring diagrams KRB version TA2 OT o TA1 n.a. n.c. 230V a.c GND 485A 485B +5V Conn_D Conn_F SF SR1 SR2 CN_J Conn_E CN_C CN_C CN_E CN_E Conn_C CN_H CN_B CN_B Conn_B CN_J CN_A CN_A CN_D CN_D CN_M Conn_A ACC1 CN_L...
  • Page 54 X2-X7: ground connectors TA1: zone 1 ambient thermostat (use a contact free from potential) 0CREMOTO04: opentherm Fondital remote control TA2: zone 2 ambient thermostat (use a contact free from potential) 0SONDAES01: external probe to be used with 0CREMOTO04 remote control SBC: NTC water heater probe 10 kOhm at 25 °C B=3435...
  • Page 55 KRB V version fig. 29...
  • Page 56 SF: flue gas NTC probe 10 kOhm at 25 °C B=3435 X2-X7: ground connectors PV: Air pressure switch 0CREMOTO04: opentherm Fondital remote control Sext: NTC external probe 10K Ohm B=3977 0SONDAES01: external probe to be used with 0CREMOTO04 remote control...
  • Page 57 KRB Z version fig. 30...
  • Page 58 SR1-SR2: CH NTC probe 10 kOhm at 25 °C B=3435 X2-X7: ground connectors SF: flue gas NTC probe 10 kOhm at 25 °C B=3435 0CREMOTO04: opentherm Fondital remote control PV: Air pressure switch 0SONDAES01: external probe to be used with 0CREMOTO04 remote control...

  • Page 59: Adaptation To Other Gas Types And Burner Adjustment

    T (°C) 27203 24979 22959 21122 19451 17928 16539 15271 14113 13054 12084 11196 10382 9634 8948 8317 7736 7202 6709 6254 5835 5448 5090 4758 4452 4168 3904 3660 3433 3222 3026 2844 2674 2516 2369 2232 2104 1984 1872 1769 1670...

  • Page 60: Gas Valve Setting

    Gas pipe Air intake pipe Mixer Gas valve fig. 31 fig. 32 Gas fitting Retaining O-ring Venturi to mixer screws retaining screws Direction tab Nozzles fig. 33 fig. 34 3.6.3. Gas valve setting 3.6.3.1. Maximum heating output adjustment - Make sure that the ambient thermostat (optional), if fitted, is set to ON. - Select the "heating"...
  • Page 61 fig. 35 FLUE CO RATE Fuel rate (%) 12 kW Methane gas 9.0 - 9.3 12 kW Propane gas 10.0 - 10.3 24 kW Methane gas 9.0 - 9.3 24 kW Propane gas 28 kW Methane gas 9.0 - 9.3 28 kW Propane gas 10 - 10.3 32 kW Methane gas...
  • Page 62 TESTING THE BOILER 4.1. Preliminary checks Before testing the boiler, it is recommended to check the following: - the installation is compliant with the prevailing standards; - the flue gas venting duct and the relative 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;...
  • Page 63 MAINTENANCE Any maintenance (and repair) work must only be carried out by qualified personnel. The user is strongly advised to have the boiler serviced and repaired by a qualified Service Centre. Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects. 5.1.

  • Page 64: Troubleshooting

    TROUBLESHOOTING BOILER STATUS MALFUNCTION PROBABLE CAUSE SOLUTION Check gas supply. Gas supply failure. Check gas supply cock or gas network safety valve intervention. Burner does not ignite. Gas valve is disconnected. Reconnect it. Gas valve is faulty. Replace it. The board is faulty. Replace it.
  • Page 65 BOILER STATUS MALFUNCTION PROBABLE CAUSE SOLUTION Interface display is disconnected. Reconnect it. No communication between board and Zone boards are disconnected. Reconnect them. E41** peripheral devices (panel interface and/ or zone boards). Interface display and/or zone boards are Replace them. faulty.
  • Page 68 Tel. +39 0365/878.31 - 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 629 - 03 Marzo 2019 (03/2019)

This manual is also suitable for:

Giava krb 24Giava krb 28Giava krb 32

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