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Unical OSA S 24 Installation And Servicing Manual
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Unical OSA S 24 Installation And Servicing Manual

Unical OSA S 24 Installation And Servicing Manual

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S 24
S 28
S 35
INSTALLATION AND SERVICING MANUAL

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Summary of Contents for Unical OSA S 24

  • Page 1 S 24 S 28 S 35 INSTALLATION AND SERVICING MANUAL...
  • Page 2 http://www.unicalag.it/prodotti/domestico-50/condensazione-gas/osa/1635/osa-s Provisions for proper disposal of the product in accordance with Directive 2002/96/EC...
  • Page 4 GENERAL INFORMATION 1.1 - GENERAL WARNINGS Installation and maintenance must be performed in compliance with the standards in force ac- cording to the instructions of the manufacturer, Systems for the production of domestic hot wa- ter MUST be constructed entirely with compliant materials.
  • Page 5 Any other use is considered improper. Unical AG S.p.A. will not be held liable for any damage resulting from improper use. Use according to the intended purposes also includes strict compliance with the in- structions in this manual.
  • Page 6 1.5 - SAFETY WARNINGS ATTENTION! The boiler cannot be used by children. The boiler can be used by adults and only after having carefully read the user’s ma- nual. Children should be supervised to ensure that they do not play or tamper with the device.
  • Page 7 1.6 - TECHNICAL DATA PLATE KEY: 1 = CE monitoring body 2 = Type of boiler 3 = Boiler model 4 = Number of stars (directive 92/42 EEC) 5 = (S.N°) Serial Number 9 = (Pn) Effective nominal output 10 = (Pcond) Effective output in condensation The rating plate is placed inside the boiler, The rating plate DUPLICATE is placed...
  • Page 8 1.7 - WATER TREATMENT The treatment of the supply water ATTENTION! allows to prevent inconveniences ANY DAMAGE TO THE BOILER and maintain the functionality and CAUSED BY THE FORMATION OF FOULING OR BY CORROSIVE WATER WILL NOT BE COVERED BY THE The ideal water pH in heating systems WARRANTY.

  • Page 9: Osa S 24

    TECHNICAL FEATURES AND DIMENSIONS NOTE! For more information 2.1 - TECHNICAL FEATURES See Technical Info from site indicated at pag. 2 2.2 - VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS OSA S 24...
  • Page 10 OSA S 28 - OSA S 35...
  • Page 11 OSA S 24 - OSA S 28 - OSA S 35 View from below View from above...
  • Page 12 Scond...

  • Page 13: Osa S 24

    2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR INSTALLATION MODULATING PUMP DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR INSTALLATION OSA S 24 Flow rate (l/h) OSA S 28 - OSA S 35 Flow rate (l/h)

  • Page 14: Table Of Contents

    2.4 - OPERATING DATA ACCORDING TO UNI 10348 OSA S 24 OSA S 28 OSA S 35 2.4.1 - DATA ACCORDING TO ErP DIRECTIVE Description Symbol Unit OSA S 24 OSA S 28 OSA S 35 Seasonal space heating energy...
  • Page 15 Class VI 2.5 - GENERAL FEATURES OSA S 24 OSA S 28 OSA S 35 D’’ F factor R factor...
  • Page 16 INSTALLATION INSTRUCTIONS 3.1 - GENERAL WARNINGS ATTENTION! If there is dust and/or if there are aggressive/corrosive vapours ATTENTION! present in the installation room, This boiler is intended solely for the appliance must be protected the use for which it was expressly designed.

  • Page 17: Osa S

    3.4 - PACKAGING must be they are potential sources of danger Unical AG S.p.A. SHELL OSA S OSA S...

  • Page 18: Osa S

    3.5 - POSITIONING THE BOILER OSA S 24 - OSA S 28 - OSA S 35 Clearance...
  • Page 19 3.6 - FLUE GAS EXHAUST PIPE CONNECTION FOR BOILERS WITH FORCED DRAUGHT In the event the boiler is replaced, ALWAYS re- C13x C43x C53x 1 + 1 (20A+20S) 1 + 1 (10A+10S) Horizontal C33x NOT ALLOWED 0,5 + 0,5 (20A+20S) 1 + 1 1 + 1 (max 30 S)
  • Page 20 > 0 = OK if < 0 = NO MT018 Please note: These values relate to exhausts/ made by means of rigid pipes and smooth original UNICAL. NOTE! For more information See Technical Info from site indicated at pag. 2...
  • Page 21 Departure Coaxial REAR NOT VISIBLE (rear in the boiler) It is recommended to only use original Unical exhaust pipes. The supplier will have no contractual or extra-contractual liability for damage caused due to incorrect installation and use and in any case failure to comply with the instructions provided by the manufacturer.
  • Page 22 3.7 - CONNECTION Condensation drain Danger! If you smell gas: FLOW RETURN COLD BOILER DRAIN S.cond CONDENSATION DRAIN FILLING VALVE SAFETY VALVE DRAIN ing of the safety valve can cause dam- age to persons, animals and objects, for which the manufacturer cannot be held responsible.
  • Page 23 FILLING VALVE Screw in load position LOAD FILLING VALVE Screw in position of NORMAL OPERATION. Unical will not be held liable for dam- age to persons, animals or objects due to failure to comply with the above instruction. behind the siphon.
  • Page 24 3.9 - ELECTRICAL CONNECTIONS Danger! any type of operation on electrical parts, always form the electrical installation. it cannot be reconnected accidentally. Before performing connections or (*) Optional SA = Room sensor supplied OT/TA = ON-OFF room thermostat (*) OT (OpenTherm) is not enabled...
  • Page 25 SHC = Multifunction module (*) SE = Outside sensor supplied Electric power supply connection Modulation Board INSIDE BOILER (*) Optional...
  • Page 26 3.10 - COMMISSIONING Switching boiler on and off NOTE! For more information See Technical Info from site indicated at pag. 2...
  • Page 27 3.11 - MEASUREMENT OF COMBUSTION EFFICIENCY DURING INSTALLATION 3.11.1- ACTIVATION OF THE CALIBRATION ATTENTION! FUNCTION Function reserved for Authorised Assistance Centres only.
  • Page 28 3.11.2 - POSITIONING THE PROBES steady state conditions (see par. 3.11.1). COAXIAL PIPES PIPES Ø 80 TYPE B23 SEPARATE PIPES...
  • Page 29 3.12 -ADJUSTING THE BURNER PRESSURE - FLOW RATES TABLE OSA S 24 Collector OSA S 28 Collector OSA S 35 Collector...
  • Page 30 3.12.1 - COMBUSTION ADJUSTMENT FUNCTION ACTIVATION After Auto Calibration GAC par. 4.3.1 box (+/-) box (+/-) box (+/-)

  • Page 31: Osa S 24

    3.12.3 - ADAPTATION OF THE POWER TO THE HEATING SYSTEM ATTENTION! The user is NOT authorised to activate the func- Function reserved for Authorised tion described below. Assistance Centres only. OSA S 24 OSA S 28 OSA S 35...
  • Page 32 INSPECTIONS AND MAINTENANCE 4.1 - INSPECTION AND MAINTE- NANCE INSTRUCTIONS TABLE OF RESISTANCE VALUES, ACCORDING TO THE TEMPERATURE, TO THE HEATING PROBE 11 (SR) AND TO THE DOMESTIC HOT WATER PROBE 1 (SS) AND ANY HEATING RETURN PROBE 22 (SRR) see par. 4.5. T°C 32755 24278...
  • Page 33 access it, rotate as indicated. provided with the boiler. This section only lists the steps requi- red to Adjustment / maintenance of the boiler: - Chimney sweep function (Par. 3.11.1) - Calibration (Par. 3.12.1) - Edit parameters (Par. 4.2) - Automatic calibration GAC Adaptive Calibration Gas (Par.
  • Page 34 ROUTINE YEARLY VERIFICATION OPERATIONS COMPONENT: VERIFY: CONTROL/INTERVENTION METHOD: ( 2 ) ( 3 ) ( 11 ) ( 1 ) ( 22 ) ( 4 ) ( 10 ) ( 13 ) ( 8 ) (26) ( 2 ) ( 24 ) ( 5 ) ( Num ) =...
  • Page 35 4.2 - PROGRAMMING OF THE OPERATION PARAMETERS WARNING! Function reserved exclusively to authorized service centers. hcm /...
  • Page 36 Parametri Min.
  • Page 37 (insert value) Historical Error...
  • Page 38 4.3 - ADAPTATION TO THE USE OF OTHER GAS Gas Conversion NOTE! DANGER! For more information The conversion for the operation of See Technical Info the boiler with a type of gas other from site indicated at pag. 2 order, must be performed by pro- In order to change the gas one must change compliance with the standards and the Factory parameter:...
  • Page 39 4.3.1 - GAC AUTOMATIC CALIBRATION WARNING! Function reserved exclusively to authorized service centers.
  • Page 40 The automatic calibration is completed.
  • Page 42 A1..A9 Services connectors Control modulating Pump Ignition/detection electrode EVCI (*) Caricamento Impianto (Only OSA S) Memory...
  • Page 43 4.4 - WIRING DIAGRAM Practical connection board Gas valve VM (A) Soupply modulating fan Diverter valve motor MDV (**) Y1..Y3 Services connectors Circolatore Modulante Boiler Supply Pressure Sensor System EXT DEVICE Terminal Outer sensor OT/TA OT disabled) connection...
  • Page 44 4.5 - ERROR CODES ERROR CODES (FAULT) CODE SAFETY THERMOSTAT (10) BLOCK High Temperature (24) ( 13 ) Outer Sensor Internal failure Parasite Flame Heating Sensor (11) Domestic Hot Water Sensor Inlet temperature Sensor (SRR) (12)
  • Page 45 Exchanger Freezing ( 24 ) Parasite Flame Speed out of control (18) (18) Speed out of control (18) Service Parameter corrupted Low line voltage Factory Parameters Water sensor pressure Water Overheater Communication error HCM, SHC: host controller missing Room1: temperature sensor Host controller missing Burners NOT detected Date and Time not valid...
  • Page 46 Gas valve wiring Internal error Ignition failure Short circuit of the iono electrode Gas valve open delay...
  • Page 47 4.5.1 - FILL THE SYSTEM...
  • Page 48 4.6 - IMPORTANT NOTES REPLACING COMPONENTS MODULATION BOARD universal board memory To replace the components: board (*) - GAS VALVE - FAN - BURNER, - IGNITION/DETECTION ELECTRODE, - MODULATION BOARD (*) In the event the memory board can be re- used, there is no need to reprogram parame- ters, settings and automatic calibration.
  • Page 49 4.6.1 - SERVICE PANEL The boiler can be programmed also by means of the service inner panel. Remove the screws indicated to ex- tract the panel and turn. Indications related to programming with the emergency panel, can be found at the address indicated on page 2, or on the user / installation manual and maintenance of KONE model boiler.

This manual is also suitable for:

Osa s 28Osa s 35