Flexiheat SFC 34 Instructions For Installation, Use And Maintenance Manual

Condensing water heater

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Installation, Use
and Maintenance Manual
for model
SFC 34
Condensing water heater
0476
SFC 34 - RAD - ING - Manuale - 1907.1_MIAB3113_R7

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Summary of Contents for Flexiheat SFC 34

  • Page 1 Installation, Use and Maintenance Manual for model SFC 34 Condensing water heater 0476 SFC 34 - RAD - ING - Manuale - 1907.1_MIAB3113_R7...
  • Page 2: Table Of Contents

    SUMMARY SUMMARY INTRODUCTION 1. INSTALLER SECTION 1.1. INSTALLATION 1.1.1. GENERAL INSTALLATION WARNINGS 1.1.2. WATER HEATER LOCATION ENVIRONMENTAL REQUIREMENTS 1.1.3. REFERENCE LEGISLATION 1.1.4. UNPACKING 1.1.5. POSITIONING AND MINIMAL TECHNICAL SPACES 1.1.6. OVERALL DIMENSIONS 1.1.7. JIG 1.1.8. HYDRAULIC CONNECTION 1.1.9. FILLING THE CONDENSATE COLLECTION SIPHON 1.1.10.
  • Page 3 SUMMARY 3. USER SECTION 3.1. USE 3.1.1. GENERAL USE WARNINGS 3.1.2. CONTROL PANEL 3.1.3. DISPLAY ICONS 3.1.4. INFO MENU DISPLAY DATA 3.1.5. START-UP 3.1.6. DOMESTIC HOT WATER TEMPERATURE ADJUSTMENT 3.1.7. OFF MODE 3.1.8. INFORMATIONAL NOTE ON ANTI-FREEZE FUNCTION 3.1.9. FAULT SIGNALLING CODES 3.1.10.
  • Page 4: Introduction

    INTRODUCTION INTRODUCTION WARNING › Device: this term is used referring to the water heater. Before starting any operation it is mandatory to read this instruction manual, in relation to the DANGER activities to be carried out as described in each It identifies an information related to a relevant section.
  • Page 5 INTRODUCTION MANUFACTURER WARRANTY AND manage. In its simplicity, the water heater is RESPONSIBILITY equipped with all accessories necessary to render it a veritable independent heating unit. All water heaters are tested and delivered with a quality The technical and functional features of the device certificate signed by the tester.
  • Page 7: Installer Section

    1. INSTALLER SECTION 1. INSTALLER SECTION The installation operations described in this section should be performed only by qualified personnel, having the appropriate technical training in the field for the installation and maintenance of components of civil and industrial domestic hot water production and heating plants.
  • Page 8: Installation

    1. INSTALLATION 1.1. INSTALLATION 1.1.1. GENERAL INSTALLATION › The device is suitable for use with the type of WARNINGS gas available by checking the water heater data plate (placed on the inner side of the front ATTENTION casing. This machine may be used only for the purpose for which it has been designed: heat water ›...
  • Page 9: Reference Legislation

    1. INSTALLATION WARNING If the temperature in the water heater installation location goes below -10 °C please insert electrical resistances kit (see chapter ‘ANTI-FREEZE PROTECTION’). WARNING The manufacturer will not be held responsible for damages caused by incorrect installation not in conformity with the over mentioned instructions and not protected adequately from the freeze.
  • Page 10: Unpacking

    1. INSTALLATION 1.1.4. UNPACKING WARNING Please unpack the water heater just before installing it. The Company is not responsible for the damages caused to the device due to incorrect storage. WARNING The packing elements (cardboard box, wooden crate, nails, fasteners, plastic bags, expanded polystyrene, etc.) must be kept out of the reach of children as they may be dangerous.
  • Page 11: Positioning And Minimal Technical Spaces

    1. INSTALLATION 1.1.5. POSITIONING AND MINIMAL TECHNICAL SPACES The water heater must be installed only on a vertical solid wall, able to sustain its weight. In order to allow the access inside the water heater for maintenance operations, you have to respect the minimum technical spaces indicated in figure To facilitate the installation, the water heater is provided with a jig that allows setting in advance...
  • Page 12: Overall Dimensions

    1. INSTALLATION 1.1.6. OVERALL DIMENSIONS 1.1.7. JIG Ø 3/4” Ø 3/4” COLD Ø 3/4”...
  • Page 13: Hydraulic Connection

    1. INSTALLATION 1.1.8. HYDRAULIC CONNECTION the characteristics of the water used and install suitable treating devices. DANGER Make sure that the tubes of the water and The heat exchanger coil cleaning frequency heating plant are not used as grounding system for depends on the hardness of the supply water and on the electrical plant.
  • Page 14: Filling The Condensate Collection Siphon

    1. INSTALLATION 1.1.9. FILLING THE CONDENSATE COLLECTION SIPHON Before starting the water heater you have to fill the condensate collection siphon in order to avoid flue reflux through the siphon. Fill the condensate collection siphon as follows (see fig. 1): ›...
  • Page 15: Anti-Freeze Protection

    1. INSTALLATION 1.1.10. ANTI-FREEZE PROTECTION Thanks to the optional electrical heating elements (code 50-00106), it is possible to protect the water heater up to an outside temperature of –10°C. The electrical resistances kit is a frost protection system that activates when the water temperature goes below the value set at parameter P11 (see chapters ‘ACCESSING AND PROGRAMMING THE PARAMETERS’...
  • Page 16: Gas Connection

    1. INSTALLATION 1.1.11. GAS CONNECTION 1.1.12. ELECTRICAL CONNECTION DANGER DANGER In order to connect the gas connector of The equipment is electrically safe only the boiler to the supply pipe use a stop seal of an if it is properly connected to an efficient grounding appropriate size and material.
  • Page 17: Optional Electrical Connections

    1. INSTALLATION 1.1.13. OPTIONAL ELECTRICAL · For frost protection through electrical CONNECTIONS resistances kit, connect the two conductors to the ‘CKR’ contacts of the terminal block (see fig. 2). To wire the optionals below: fig. 1 After performing these operations, remount the •...
  • Page 18: Fume Exhaust Fittings

    1. INSTALLATION 1.1.14. FUME EXHAUST FITTINGS › The discharge duct must be perpendicular with the opposite internal wall of the chimney or of WARNING the fumes exhaust duct (fig. 1). In order to ensure proper operation and efficiency of the device you have to connect the water heater fume exhaust fitting to the fume exhaust duct using appropriate polypropylene flue fittings for condensing water heaters.
  • Page 19: Types Of Fume Exhaust Systems

    1. INSTALLATION 1.1.15. TYPES OF FUME EXHAUST SYSTEMS KIT AK 50 - HORIZONTAL CO-AXIAL SYSTEM Ø80/125 INTERNAL POLYPROPYLENE DUCT ADJUSTABLE AT 360°. It allows fumes discharge and air intake from external wall. Suitable only for condensing boilers. It allows fuel gas discharge and air intake for combustion through co-axial ducts, the external one for air intake, the plastic internal one for fumes discharge.
  • Page 20 1. INSTALLATION KIT H – HORIZONTAL TWIN PIPE FLUE KIT Ø80/80, IN POLYPROPYLENE, ADJUSTABLE AT 360°. The twin pipe allows flue discharge through the flue exhaust duct and air intake from outside. Suitable only for condensing boilers. It allows discharging fuel gas and air suctioning for combustion through two separated ducts.
  • Page 21 1. INSTALLATION KIT CK 50 - VERTICAL CO-AXIAL SYSTEM Ø80/125 INTERNAL POLYPROPYLENE DUCT. It allows fumes discharge and air intake directly from roof. Suitable only for condensing boilers. It allows fuel gas discharge and air intake for combustion through co-axial ducts, the external one for air intake, the plastic internal one for fumes discharge.
  • Page 23: Support Center Section

    1. SUPPORT CENTRE SECTION 2. SUPPORT CENTER SECTION All operations described below relative to first start- up, maintenance and replacement should be performed only by qualified personnel...
  • Page 24: First Start-Up

    2. FIRST START-UP 2.1. FIRST START-UP 2.1.1. PRELIMINARY OPERATIONS › make sure that there are no flammable liquids FOR FIRST START-UP or materials near the device; The first start-up operations consist in checking › open the water heater gas tap and make sure the correct installation, adjustment and operation that there are no gas leaks upstream from of the device.
  • Page 25: Water Heater Commissioning

    2. FIRST START-UP 2.1.2. WATER HEATER COMMISSIONING fig. 1 Proceed with water heater commissioning as follows: › power the water heater; › open the gas tap; › ignite the unit by pressing the button › open the D.H.W. taps at the maximum flow rate; ›...
  • Page 26: Co2 Value Check And Calibration

    2. FIRST START-UP 2.1.3. CO2 VALUE CHECK AND › Access parameter ‘P03’ following the procedure CALIBRATION described chapter “ACCESSING PROGRAMMING THE PARAMETERS” and stay WARNING in edit mode until the calibration is completed The CO value should be checked with (the maximum time before forced exiting the the casing assembled, while the gas valve should be edit mode is 7 minutes.
  • Page 27: Accessing And Programming The Parameters

    2. FIRST START-UP 2.1.4. ACCESSING AND PROGRAMMING THE PARAMETERS To access the parameters menu and adjust their values, follow the procedure below: Press the " " button to select the OFF mode. Press and hold both the ' ' and ‘ ’...
  • Page 28 2. FIRST START-UP Keep the ' ' button pressed until the parameter value is displayed. Use the ‘ ’ and ‘ ’ buttons of the domestic circuit to change the parameter value. Keep the ' ' button pressed until the parameter is displayed in order to confirm the modified value.
  • Page 29 2. FIRST START-UP To quit the parameters menu, press the ' button until 'OFF' is displayed.
  • Page 30: Miab3113 Parameters Table

    2. FIRST START-UP 2.1.5. MIAB3113 PARAMETERS TABLE PARAMETER DESCRIPTION RANGE FUNCTION SELECTION OF THE FIRE RATING 0 - 3 0 = 24 KW 1 = 28 KW 2 = 34 KW GAS TYPE SELECTION 0 - 1 0 = NATURAL GAS ATTENTION: READ THE INSTRUCTION IN CHAPTER ‘GAS TRANSFORMATION’...
  • Page 31 2. FIRST START-UP PARAMETER DESCRIPTION RANGE FUNCTION MAXIMUM DOMESTIC SETPOINT 50 - 67 VALUE EXPRESSED IN °C (PRE- THROUGH THIS PARAMETER YOU CAN SET THE USER- SET AT 60°C) ADJUSTABLE MAXIMUM DOMESTIC TEMPERATURE. MINIMUM DOMESTIC SETPOINT 35 - 45 VALUE EXPRESSED IN °C (PRE- THROUGH THIS PARAMETER YOU CAN SET THE USER- SET AT 40°C) ADJUSTABLE MINIMUM DOMESTIC TEMPERATURE.
  • Page 32: Maintenance

    CALIBRATION”; annual basis. The operations described below, are essential to the validity of the standard FLEXIHEAT warranty and › periodically check the integrity of the fume must be performed by professionally qualified personnel...
  • Page 33: Technical Data

    2. MAINTENANCE 2.2.7. TECHNICAL DATA Model SFC 34 CE certification 0476CQ0134 Gas category II2H3B/P Flue system type type B23-B23p-B33-B53-C13- C 3 3-C 4 3-C5 3-C6 3-C7 3- C83-C93 Heat Input max (D.H.W.) Heat Input min (D.H.W.) Maximum combustion efficiency Minimum combustion efficiency 99,6 Flue efficiency losses with burner on (Heat Input max.)
  • Page 34 2. MAINTENANCE Fan - Min. available pressure Max. Flue length Ø60/100 - Horiz. Conc. Flue bend 45° MF Ø60/100 - Pressure loss Flue bend 90° MF Ø60/100 - Pressure loss Flue extension MF Ø60/100 L=1000 - Pressure loss Max. Flue length Ø80/125 - Horiz. Conc. Flue bend 45°...
  • Page 35 2. MAINTENANCE Supply pressure max. - G30 mbar Fan speed Max. D.H.W. output - G30 Fan speed Min. D.H.W. output - G30 Gas consumption - G30 kg/h 2,68 Supply pressure - G31 mbar Supply pressure min. - G31 mbar Supply pressure max. - G31 mbar Fan speed Max.
  • Page 36: Technical Assembly

    CONDENSATE COLLECTION SIPHON GAS VALVE MANUAL AIR RELIEF VALVE 10. DOMESTIC HOT WATER OUTLET PROBE 11. SAFETY THERMOSTAT 12. LIGHT UP ELECTRODE 13. ELECTRIC FAN 14. COLD WATER INLET PROBE 15. FLUXMETER SFC 34 - RAD - ING - Manuale - 1907.1_MIAB3113_R7...
  • Page 37: Hydraulic Board

    2. MAINTENANCE 2.2.9. HYDRAULIC BOARD C. DOMESTIC HOT WATER OUTLET G. GAS INLET SC. CONDENSATE DRAIN F. COLD WATER INLET FUMES SAFETY THERMOFUSE HEAT EXCHANGER BURNER UNIT ELECTRIC FAN CONDENSATE COLLECTION SIPHON SAFETY VALVE 8 bar MANUAL AIR RELIEF VALVE DOMESTIC HOT WATER OUTLET PROBE SAFETY THERMOSTAT 10.
  • Page 38: Wiring Diagram

    2. MAINTENANCE 2.2.10. WIRING DIAGRAM +24V MIAB3113 M0900 2 3 4 M0902 M0901 M0101 M0100 220 V 50 Hz ER: DETECTION ELECTRODE MF: FLUXMETER NE: BLACK CKR: CONTACT FOR ANTIFREEZE EA: START-UP ELECTRODE SI: DOMESTIC CIRCUIT PROBE INLET CE: BLUE OPTIONAL ELECTRIC EV: ELECTRIC FAN...
  • Page 39: Accessing The Water Heater

    2. MAINTENANCE 2.2.11. ACCESSING THE WATER HEATER For the majority of the control and maintenance operations you have to remove one or more panels of the casing. The side panels can be removed only after removing the front panel. To intervene on the front of the water heater proceed as follows: ›...
  • Page 40: Accessing The Electronic Board

    2. MAINTENANCE 2.2.12. ACCESSING THE ELECTRONIC BOARD In order ot intervene on the wirings of the control panel, please proceed as follows: DANGER Cut off the voltage from the main switch. › Grab at the same time the support brackets of the control panel (fig.
  • Page 41: Emptying The Domestic System

    2. MAINTENANCE 2.2.13. EMPTYING THE DOMESTIC SYSTEM If there is freezing risk, you have to empty the domestic system as follows: › close the main supply tap of the water supply network; › open all cold and hot water taps; ›...
  • Page 42: Fault Signalling Codes

    2. MAINTENANCE 2.2.14. FAULT SIGNALLING CODES CODE FAULT POSSIBLE CAUSE SOLUTION RESET FLAME BLOCK NO FLAME LIGHT UP MANUAL RESET (PRESS THE RESET GAS MISSING; CHECK THE ADDUCTION NETWORK; ‘ ’ KEY). MASS OR BROKEN START- REPLACE IT; UP ELECTRODE; GAS VALVE BROKEN;...
  • Page 43 2. MAINTENANCE CODE FAULT POSSIBLE CAUSE SOLUTION RESET INLET PROBE BROKEN OR INCORRECTLY REPLACE IT; AUTOMATIC. (COLD WATER) CALIBRATED PROBE (RESISTANCE VALUE 10 KOHM AT 25 °C NTC); DISCONNECTED OR WET CHECK THE WIRING. PROBE CONNECTOR. DOMESTIC CIRCUIT BROKEN OR INCORRECTLY REPLACE IT;...
  • Page 44: Active Functions Signalling Codes

    2. MAINTENANCE 2.2.15. ACTIVE FUNCTIONS SIGNALLING CODES CODE FUNCTION DESCRIPTION D.H.W CIRCUIT ANTI-FREEZE IF THE OPTIONAL ELECTRICAL RESISTANCES KIT (CODE 50-00106) IS INSTALLED IN THE WATER HEATER, THE FROST POROTECTION SYSTEM ACTIVATES WHEN THE WATER TEMPERATURE GOES BELOW THE VALUE SET AT PARAMETER P11 (SEE CHAPTERS “ACCESSING AND PROGRAMMING THE PARAMETERS”...
  • Page 45: Gas Type Transformation

    2. MAINTENANCE 2.2.16. GAS TYPE TRANSFORMATION ATTENTION Make sure that the gas adduction tube is suitable for the new type of fuel with which the water heater is supplied. › loosen the two screws ‘1’ (fig.1) from the fastening bush, and remove the air suction tube; ›...
  • Page 47: User Section

    1. USER SECTION 3. USER SECTION The operations described in this section are addressed to all those who will use the machine. The machine must be used and accessed only by qualified operators that fully read and understood the User section, paying particular attention to the warnings.
  • Page 48: Use

    3. USE 3.1. USE 3.1.1. GENERAL USE WARNINGS › DO NOT use electrical switches, the telephone or any other device that might generate electrical WARNING discharges or sparks; Before starting the water heater the User must make sure that the First start-up certificate has ›...
  • Page 49: Control Panel

    3. USE 3.1.2. CONTROL PANEL DOMESTIC WATER TEMPERATURE ADJUSTMENT KEYS OPERATING MODE SELECTION KEY: SUMMER / HEATING ONLY / WINTER / OFF RESET KEY: ANOMALY RESET DISPLAY...
  • Page 50: Display Icons

    3. USE 3.1.3. DISPLAY ICONS INDICATION OF PARAMETER NUMBER OR DISPLAYED INFO CODE. FLAME PRESENT SIGNALLING. ERROR DISPLAY THAT CAN BE RESET. PARAMETERS PROGRAMMING FUNCTION ACTIVE. fig. 1 OPERATION IN DOMESTIC MODE ENABLED.
  • Page 51: Info Menu Display Data

    3. USE 3.1.4. INFO MENU DISPLAY DATA To view the boiler data from the info menu you just have to press at the same time the keys ‘ ‘ ’ ’ of the DHW circuit for 2 seconds. It will be displayed the info code alternated to the associated value.
  • Page 52: Start-Up

    3. USE 3.1.5. START-UP › Or ask the installation of the optional electrical resistances kit (see chapter ‘INFORMATIONAL Before starting the water heater make sure that NOTE ON ANTI-FREEZE FUNCTION’). it is powered and that the gas tap below the water heater is open.
  • Page 53: Fault Signalling Codes

    3. USE 3.1.9. FAULT SIGNALLING CODES The water heater might signal some faults by displaying a code. Below you have a list of the codes and of the operations to be performed in order to unlock the water heater. CODE FAULT INTERVENTION FLAME BLOCK...
  • Page 54: Active Functions Signalling Codes

    3. USE 3.1.10. ACTIVE FUNCTIONS SIGNALLING CODES CODE FUNCTION INTERVENTION D.H.W CIRCUIT WAIT UNTIL A N T I - F R E E Z E OPERATION IS COMPLETED FUNCTION ACTIVE...
  • Page 55: Maintenance

    3. USE 3.1.11. MAINTENANCE To ensure proper water heater safety and efficiency, please check the device every year. An accurate maintenance should improve system management. 3.1.12. COVER CLEANING Clean the cover of the device using a wet cloth and come neutral soap. WARNING DO NOT use abrasive or powder detergents as they might damage the plastic cover and control...

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