Unical eK! R 18 Installation And Servicing Manual
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Unical eK! R 18 Installation And Servicing Manual

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18 - 20 - 24
INSTALLATION AND SERVICING MANUAL

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  • Page 1 MODE RESET ® 18 - 20 - 24 INSTALLATION AND SERVICING MANUAL...
  • Page 2 https://www.unicalag.it/prodotti/caldaie-domestiche-50/condensazione-gas/5665/ek Provisions for proper disposal of the product. At the end of its life cycle the product must not be disposed of as urban waste. It can be taken to a special recycling centre managed by the local authorities, or to a dealer who offers this service. Separate disposal of a domestic appliance avoids possible negative consequences for the environment and human health deriving from inappropriate waste handling and allows the recovery of the materials of which it is made, in order to obtain significant energy and resource savings.

  • Page 3: Table Of Contents

    Attention: this manual contains instructions for the exclusive use of the professionally qualified installer and/or maintenance technician in compliance with current legislation. The user is NOT qualified to intervene on the boiler. The manufacturer will not be held liable in case of damage to persons, animals or objects resulting from failure to comply with the instructions contained in the manuals supplied with the boiler.

  • Page 4: General Information

    Any repairs must be performed solely by personnel regarding installation, use and maintenance safety. authorised by Unical AG S.p.A., using original spare parts only. Failure to comply with the above can Keep the booklet with care for further consultation.

  • Page 5: Symbols Used In The Manual

    The appliance is designed to work in heating systems, with hot water circulation, for the production of domestic hot water. Any other use is considered improper. For any damage resulting from improper use UNICAL AG. S.p.A. assumes no respon- sibility. Use according to the intended purposes also includes strict compliance with the in- structions in this manual.

  • Page 6: Safety Warnings

    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: Technical Data Plate

    1.6 - TECHNICAL DATA PLATE The CE marking KEY: certifies the compliance of the equipment with the 1 = CE monitoring body essential safety requirements defined in the directi- 2 = Type of boiler 3 = Boiler model ves and applicable European regulations and that 4 = Number of stars (directive 92/42 EEC) its functioning satisfy applicable technical stan- 5 = (S.N°) Serial Number...

  • Page 8: Water Treatment

    1.7 - WATER TREATMENT The treatment of the supply water ATTENTION! allows to prevent inconveniences ANY DAMAGE TO THE BOILER CAUSED BY and maintain the functionality and THE FORMATION OF FOULING OR BY COR- efficiency of the generator over time. ROSIVE WATER WILL NOT BE COVERED BY THE WARRANTY.

  • Page 9: Boiler Antifreeze Protection

    1.8 - BOILER ANTIFREEZE This protection can intervene only if the electricity and gas supplies are PROTECTION connected. If one of the two is not available and To activate the antifreeze function only, po- upon reset SMG - flow sensor general) sition the two knobs as shown in the figure.

  • Page 10: Technical Features And Dimensions

    TECHNICAL FEATURES AND DIMENSIONS NOTE! For further details refer to the Technical 2.1 - TECHNICAL FEATURES Information from the website (link at page 2) 2.2 - VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS Pump N° S.E. Description Water deficiency pressure switch Domestic hot water temperature sensor Diverting valve...
  • Page 11 MODE RESET ® View from above View from below Scond Control panel Safety valve drain Domestic hot water outlet G ½ Scond Condensation drain Gas inlet G ¾ S.E. = WIRING DIAGRAM KEY see par. 4.5 Cold water inlet G ½ Heating system flow G ¾...

  • Page 12: Available Flow Rate / Pressure Diagram

    2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR INSTALLATION Flow rate (l/h)

  • Page 13: Operation Data

    Our appliances are built to work with natural gas (G20), G.P.L. and mixtures of methane and hydrogen up to 20% by volume (20% H2NG). The supply pipe must be equal to or greater than the fitting of the appliance. eK! R 18-C 18 eK! R 20-C 20 eK! R 24-C 24 18 / 24...

  • Page 14: Data According To The Directive Erp

    2.6 - DATA ACCORDING TO ErP DIRECTIVE Description Symbol Unit R 18 C 18 Nominal Heat Output Pnominal Seasonal space heating energy ƞ efficiency Seasonal efficiency class in heating mode For CH only and combination boilers: useful heat output Useful Heat Output in high-tempera- ture regime 17,5 19,4...

  • Page 15: Installation Instructions

    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 suitably and must be able to designed.

  • Page 16: Packaging

    Unical AG S.p.A. will not be held liable for damage to persons, animals or ob- jects due to failure to comply with the instruction above.

  • Page 17: Positioning The Boiler

    3.5 - POSITIONING THE BOILER When choosing the place of the installation of the appliance, follow the safety instructions below: - Place the appliance in rooms protected from frost. - Avoid installation in rooms with a corrosive or very dusty atmosphere. - The appliance must only be installed on a vertical and solid wall which can support its weight.

  • Page 18: References And Positioning

    3.5.1 - REFERENCES FOR BOILER POSITIONING MODE RESET ®...
  • Page 19 references for rear outputs references for twin output Ø 80. coaxial, (kit a) references for rear outputs references for twin outputs coaxial, with socket and bend Ø 80 (kit b) distance from safety relief valve wall hydraulic outlets reference for / condensate drain installation with horizontal pipe kit 00362527...

  • Page 20: Flue Gas Exhaust Pipe Connection

    Please note: these values relate to if < 0 = NO exhausts/made by means of rigid WRONG configuration pipes and smooth original UNICAL. ATTENTION [m] = equivalent meters (*) Values in the MT018 available on the website (technical info section)
  • Page 21 (only for natural gas G20). It is possible to install the appliance with the “clapét” accessory not supplied by Unical outside the boiler. LT** (LUNGHEZZA TOTALE o LAspirazione + LScari- The use of the clapét as an accessory requires a dedicated set of parameters to compensate for DOUBLE Ø80...
  • Page 22 ATTENTION: The flue must comply with standards in force. C (83) x C (83) B (23) P TOTAL LENGTH (LS) Connection to a terminal for combustion air intake DOUBLE Ø80 and flue gas exhaust via a single or collective FROM [m] TO [m] chimney.
  • Page 23 C condensing appliances. Consequently, the ration C (10) only with the optional accessory. B53P / B23P configuration is prohibited. “clapét” provided by Unical. The installation of boilers on pressurized collective Use of clapét as an accessory and requires a...
  • Page 24 GENERAL INFORMATION ON THE FLUE GAS EXHAUST SYSTEM Per sistemi coassiali, montare il collare 3 (contenuto nei kit fumi coassiali) come indicato. Warning: DO NOT remove the rubber cap mounted on the hole of air inlet Ø 80 A2 KIT A coax. Ø 100/60 = 00364813 00364815 (*) 00363307 (*) Coaxial inception...
  • Page 25 For double systems Use system adapters split (*) as indicated. Attention: remove the cap of clasp mounted on the hole of air inlet Ø 80 A2 KIT B double Ø 80 = 00364891 For split systems 00364817 (*) Use system adapters split (*) as indicated.
  • Page 26 Type B22 for oudoor installation 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...

  • Page 27: Connections

    3.7 - CONNECTION Condensation drain The boiler, during the combustion process, produces 3/4’’ condensation that, through pipe “A”, flows into the trap. Danger! The condensation that forms inside the boiler flows The gas connection must be carried out into a suitable drain via pipe “B”. only by a qualified installer who must re- spect and apply that foreseen by relevant laws in force in the local prescriptions of...

  • Page 28: Filling The System

    This could damage the gaskets and cause noise during operation. Unical will not be held liable for dam- age to persons, animals or objects due to failure to comply with the above instruction.

  • Page 29: Electrical Connections

    3.9 - ELECTRICAL CONNECTIONS Danger! type of operation on electrical parts, always Only a qualified technician may per- disconnect electrical power and make sure that form the electrical installation. it cannot be reconnected accidentally. Before performing connections or any Attention, before rotating or removing the panel.
  • Page 30 External probe connection (*) ON/OFF room thermostat connection TA/OT (*) X5A/B X5A/B TA /OT TA /OT Connect the modulating thermostat wires between - Predisposed on the terminal board, terminals terminals TA/OT after having removed the jumper Electric power supply connection The boiler is equipped with a power cable, boiler installation requires electric al con- nection to the mains power supply.

  • Page 31: Commissioning

    3.10 - COMMISSIONING Commissioning must be done by profes- failure to comply with the above instruction. sionally qualified personnel. Unical AG Before commissioning the boiler, check that: S.p.A. will not be held liable for damage to persons, animals or objects due to...

  • Page 32: Measurement Of Combustion Efficiency During Installation

    3.10.1 - AIR BLEED FUNCTION OF BOILER / SYSTEM (AP) MODE The air bleed function is activated every time the boiler is powered electrically (Power ON). The procedure has a duration of 10 minutes and for the entire time of the procedure the display shows AP flashing.
  • Page 33 Note: DISABLING This function does not allow any The “TEST MODE” function remains active for 15 adjustment of CO2 levels on min/max minutes. power. If you need to apply correction to CO2 values To stop TEST MODE function before the time (Ref.

  • Page 34: Burner Adjustment

    3.12 - ADJUSTING THE BURNER In order for the boiler to work properly the content of CO must comply with the tolerance field of the table below. NOZZLES - PRESSURE - FLOW RATES TABLE Check the levels of CO2 often, especially with low flow rates. They refer to the boiler with a closed combustion chamber. EK! R18 - C18 (referring data to CH mode) Effective Heating Supply...
  • Page 35 EK! R24 - C24 (dati riferiti al funzionamento in riscaldamento) Effective Heating Supply Collector Dia- Con- Con- Start- Type of (*) - Levels Output Thermal Press. speed diaphragm phragm sumpt. sumpt. levels Capacity [Ø/n. power [kg/h] [kg/h] [kW] [mbar] [rpm] holes] [Ø] [kW]...

  • Page 36: Function Activation Combustion Adjustment

    3.12.1 - COMBUSTION ADJUSTMENT FUNCTION 1 - Scroll through the parameters with the {Minus This function allows partial regulation of the CO2 CH} key up to parameter C07 (CHIMNEY SWEEP) value (- 8 ÷ + 8 ) at the Minimum power (H01) and at the Maximum power (H02 / H03 CH in the case MODE of a reduced power boiler).
  • Page 37 5 - the boiler goes to maximum power, 8 - Press the {MODE} key to confirm the with the analyzer inserted, check the level value of Co 2 at max. (if ok exit {MODE}). 6 - otherwise press {Plus CH} to go to MODE parameter C09 (CO2 adjust pot.
  • Page 38 14 - press {More DHW} to change value 11 - Change the value 00 to 01 (minimum power) to increase the CO2 to the min power. with key {Plus DHW} press {Plus or Minus DHW} (range -8 to +8) MODE MODE 12 - Activate level 01 (minimum power) inside parameter C07 with {MODE}...
  • Page 39 CHIMNEY SWEEP VALUE RESET MODE MODE MODE MODE MODE MODE MODE MODE MODE...

  • Page 40: Adaptation Of The Power To The Heating System

    3.12.2 - ADAPTATION OF THE POWER TO THE HEATING SYSTEM ATTENTION! It is possible to adjust the maximum thermal capacity Function reserved for Authorised in heating mode, by decreasing the burner output Assistance Centres only. value. The user is NOT authorised to acti- Act on parameter A05 (par.

  • Page 41: Maintenance Instructions

    • Open the heating flow and return pipes, as well Unical spare parts must be used. as the cold water inlet valve (if closed previously). • Vent and, if necessary, restore the heating pres- If a component needs to be replaced: sure until reaching a pressure of 0.8/1.0 bar.
  • Page 42 It is recommended to use the using a meter and compare the val- products purposely created by ue with that contained in table 3.12. Unical (see system protection The data measured indicates if the ACCESSORIES sect. in the exchanger needs cleaning.

  • Page 43: Parameters That Can Be Edited From The Control Panel

    4.2 - MENU INFO ATTENTION! Function reserved exclusively for Au- thorized Assistance Centres. Press the {Mode} key for 3 seconds to enter the information menu. Inside the menu, the parameter number alternates with the relative value every 3 seconds. Press the {Mode} key for 3 seconds to exit the in- formation menu.

  • Page 44: Adaptation To The Use Of Other Gas

    4.3 - ADAPTATION TO THE USE OF OTHER GAS The boilers are produced for the type of gas specif- Gas transformations ically requested upon ordering. NOTE! DANGER! Further details in the section The conversion for the operation of ‘‘Technical Information’’ at the address indicat- the boiler with a type of gas other ed on page 2.

  • Page 45: Calibration Auto_Cal

    4.3.1 - AUTO-CAL CALIBRATION 2 - Scroll through the parameters with the {Minus CH} key up to parameter C06 (Autocal) Note: The calibration procedure, if carried MODE out correctly and with the use of sa- nitary water, takes about 9 minutes. Autocalibration is a function that automatically per- forms the Iono combustion test at maximum power, at maximum CH power, at 3500 rpm and at minimum...
  • Page 46 5 - Activate with {MODE} key MODE 5 - Activate with {MODE} key MODE 6 - Auto-cal process has started. MODE...

  • Page 47: Important Note

    4.4 - IMPORTANT NOTES REPLACING COMPONENTS Before replacing components one must follow the MODULATION BOARD notes of chap. 4 “Inspections and maintenance”. universal board memory The memory board is To replace the components: board (*) programmed by de- - MODULATION BOARD (in the event the fault for METHANE memory board CANNOT be reused) (*), gas operation.

  • Page 48: Wiring Diagram

    4.5 - WIRING DIAGRAM Practical connection board E.ACC./ R L I . N NC NO ( ) A NON UTILIZZATO/ NOT USED X5A/B (MODU TION OR ) BL (TACHO) BR (PWM) 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 1 2 3 4 (G D...

  • Page 49: Error Codes

    4.6 - FAILURE DETECTION In case of failure the burner is automatically switched off. PRIORITY ANOMALY CODE TYPE Eeprom fault Lockout Remote restore attempts exhausted Lockout VG feedback fault Lockout Gas valve module insertion sequence fault Lockout Gas valve not connected Lockout Generic fault in the gas valve module Lockout...

  • Page 50: Combustion Control Alarms

    4.6.1 - COMBUSTION CONTROL ALARMS Below is a list of the error codes managed by the board relating to the combustion control part. CODE DESCRIPTION E 185 Occur during running state of safety cycle when the flame signal disappears E 194 Occur during running state of safety cycle close loop control is out of control more than 50 sec E 195...

  • Page 51: Set Parameter

    4.7 - SET PARAMETER As an alternative, after having chosen the parameter Press { Minus CH + Minus DHW } key for 4 seconds and the associated value, to return to the home page to access to the parameter setting menu. Press {Plus just wait 1 minute without pressing anything.
  • Page 52 COD. TSP DESCRIPTION DEFAULT STEP CESS. LEVEL Pump speed reduction time du- 0=n.u. ring 3-way switching 1 ÷ 10 Proportional band CH Ti CH Tcd CH Td CH Proportional band DHW Ti ACS Tcd ACS Td ACS Control type DHW 0=DHW sensor 1=CH sensor Type Control of tank...
  • Page 53 COD. TSP DESCRIPTION DEFAULT STEP CESS. LEVEL DHW setpoint negative hystere- °C sis (->ON) DHW setpoint positive hysteresis °C (->OFF) Post-circulation time in DHW DHW Off control DHW: 0 = Variable - 1 = fix DHW request delay CH start delay CH setpoint negative hysteresis °C (->ON)
  • Page 56 - export@unical-ag.com - www.unical.eu Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press. Also reserves the right to bring those changes that it will hold necessary to it own products or profits, without jeopardizing its essential characteristics.

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