Unical CoR Series Installation And Servicing Manual
  1. Manuals
  2. Brands
  3. Unical Manuals
  4. Boiler
  5. CoR Series
  6. Installation and servicing manual

Unical CoR Series Installation And Servicing Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
®
2
CoR
1
3
bar
0
4
service
bar
MAX
MIN
MAX
CoR
R 24 - C 24
INSTALLATION AND SERVICING MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CoR Series and is the answer not in the manual?

Questions and answers

Related Manuals for Unical CoR Series

Summary of Contents for Unical CoR Series

  • Page 1 ® service R 24 - C 24 INSTALLATION AND SERVICING MANUAL...
  • Page 2 https://www.unicalag.it/prodotti/domestico-50/condensazione-gas/2577/cor 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: Avvertenze Per La Sicurezza

    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

    This protection can intervene only if 1.8 - BOILER ANTIFREEZE 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 11 (SR) a temperature of < 2 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 2.2 - VIEw wITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS CoR C24 N° C.E. S.E. Description Filling valve Domestic hot water temperature sensor Diverter valve Flow switch with cold water filter...
  • Page 11 CoR C24 service View from above View from below Scond Condensate level sensor Boiler drain Low Nox burner Safety valve drain Nozzle Scond Condensation drain Condensing recovery unit C.E. = ERROR CODES see par. 4.6 Domestic hot water outlet G ½ S.E. = WIRING DIAGRAM KEY see par. 4.5 Gas inlet G ¾ Cold water inlet G ½...

  • 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

    2.4 - OPERATING DATA For the adjustment data: NOZZLES - PRESSURES - DIAPHRAGMS - FLOW RATES - CONSUMPTIONS refer to the paragraph ADAPTATION TO OTHER TYPES OF GAS.WW. R 24 - C24 Nominal heat input in CH / DHW mode 25,0 / 25,0 Minimum heat input with Nat. Gas / Propane 7,5 / 8,5 Nominal heat output 23,8 Minimum heat output Nominal output in condensation 50/30 °C 24,8 Minimum heat output in condensation 50/30 °C Combustion efficiency at full load...

  • Page 14: General Features

    2.5 - GENERAL FEATURES R 24 C 24 Appliance category 2H3P Minimum heat. circuit output (∆t 20 °C) l/min Minimum heating circuit pressure bar (kPa) 0,5 (50) Maximum heating circuit pressure bar (kPa) 3 (300) Primary circuit content Maximum operating temperature in heat. °C Minimum operating temperature in heat.

  • Page 15: Installation Instructions

    INSTALLATION INSTRUCTIONS 3.1 - GENERAL wARNINGS ATTENTION! If there is dust and/or if there are ATTENTION! aggressive/corrosive vapours This boiler is intended solely for present in the installation room, the use for which it was expressly the appliance must be protected designed.

  • Page 16: Packaging

    Siphon, (with corrugated pipe and fixing strap) Unical AG S.p.A. will not be held liable inside the boiler. 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 For Boiler Positioning

    3.5.1 - REFERENCES FOR BOILER POSITIONING ® service...
  • Page 19 references for rear outputs references for outputs with double coaxial, (kit a) pipes Ø 80. references for rear outputs references for rear outputs with double coaxial, with socket and bend pipes and bends Ø 80. (kit b) distance from the wall drain safety valve reference hydraulic outputs for / condensate drain installation with pipe kit...

  • Page 20: Flue Gas Exhaust Pipe Connection

    3.6 - FLUE GAS EXHAUST PIPE CONNECTION FOR BOILERS wITH FORCED DRAUGHT To connect the flue gas exhaust pipe, local and na- place the flue gas pipe as well. tional standards must be observed The boiler is type approved for the exhaust configu- In the event the boiler is replaced, ALwAYS re- rations listed below: C13x...
  • Page 21 > 0 = OK - POSSIBLE configuration if < 0 = NO - WRONG configuration (*) Values in the MT013 available on the website. Please note: these values relate to exhausts/made by means of rigid pipes and smooth original UNICAL.
  • Page 22 Rubber closure plugs for Coaxial It is recommended to only use original (DO NOT REMOVE) 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 23: 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 Danger!

  • Page 24: Filling The System

    Further details in the section ‘‘Technical Information’’ on the boiler page of Unical will not be held liable for dam- the www.unicalag.it website age to persons, animals or objects due to failure to comply with the above instruction.

  • Page 25: Electrical Connections

    3.9 - ELECTRICAL CONNECTIONS Danger! any 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 00330914 ATTENZIONE! ATTENTION! ACHTUNG!
  • Page 26 External probe connection (*) Electric power supply connection - Predisposed on the terminal board, terminals See par. 4.5 positioning on the board (*) Optional The boiler is equipped with a power cable, boiler installation requires electric al con- nection to the mains power supply. This connection must be made up to standard, as required the regulations in force.

  • Page 27: 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 28: Measurement Of Combustion Efficiency During Installation

    3.11 - MEASUREMENT OF COMBUSTION EFFICIENCY DURING INSTALLATION 3.11.1- ACTIVATION OF THE CALIBRATION FUNCTION ATTENTION! The user is NOT authorised to activate Function reserved for Authorised the function described below. Assistance Centres only. ACTIVATION MINIMUM OUTPUT x 5’’ By pressing the button (D) for 5 seconds, until By turning the knob (B) in position , the boiler SErvice appears, Do not press it for more than...

  • Page 29: Burner Adjustment

    3.11.2 - POSIZIONAMENTO DELLE SONDE Take the measurements with the generator in To determine the combustion efficiency steady state conditions (see par. 3.11.1). one must make the following measurements: N.B.: Insert smoke probe only after ignition of the burner, in order to avoid - measurement of the combustion air temperature the saturation of the analizer cells.
  • Page 30 All boilers leave the factory already cali- The following instructions are intended brated and tested, however in the event exclusively for Unical AG Sp.A. author- the gas valve recalibration is required: ised service personnel. - Loosen the needle screw ‘’P’’ located inside the pressure socket at gas valve outlet and connect a pressure gauge with reference to the figure.

  • Page 31: Adaptation Of The Power To The Heating System

    NOZZLES - PRESSURE - COLLECTOR TABLE Check the burner pressure levels especially at low flow rates. The values in the table refer to a closed combustion chamber. CoR R 24 - CoR C 24 Type of Power Power Supply Ø Nozzles Ø...

  • Page 32: Maintenance Instructions

    • Vent and, if necessary, restore the heating pres- and to avoid altering its approved status, only original sure until reaching a pressure of 0.8/1.0 bar. Unical spare parts must be used. • Open the gas shut-off valve. • Switch the boiler on If a component needs to be replaced: •...
  • Page 33 ROUTINE YEARLY VERIFICATION OPERATIONS COMPONENT: VERIFY: CONTROL/INTERVENTION METHOD: Is the minimum domestic hot water The burner must ignite with an (domestic hot water flow rate 3 l/min.? intake above or equal to: 3 l/min. priority flow switch ( 2 ) Does the valve modulate properly? Open a hot water tap at maxi- (Gas valve) ( 3 )

  • Page 34: Parameters That Can Be Edited From The Control Panel

    4.2 - PARAMETERS THAT CAN BE EDITED FROM THE CONTROL PANEL ATTENTION! DISPLAY Function reserved for Authorised As- sistance Centres only. Menu access: InFormation Errors Log SErvice Factory tAratura _CALIBRATION Turn knob (B) to display the parameter list InF ACTIVATION - SELECTION PARAMETERS LIST InF The display alternates the Parameter and Value Press reset buton (D) for 10 sec.
  • Page 35 DISPLAY - FAULT (Hi) Errors Log Press reset button (D) to display the fault code (see chap.5). ATTIVAZIONE - SELEZIONE Vedi punto 1 (4.2) Premere il tasto (D) per accedere al gruppo parametri Hi, 01 = last error 08 = fault code (LP displayed Water deficiency) The display alternates H and the number of the...
  • Page 36 (SE) Service parameters EDITING THE VALUE ACTIVATION - SELECTION See section 1 (4.2) Press reset buton (D) to access the SE parame- ters unit. These parameters can be edited with- out restrictions, from the control panel. DISPLAY Press reset buton (D) to access the parameter, the parameter value flashes.
  • Page 37 (FA) Factory Parameters UNIT 1 - FA PARAMETERS LIST CODE RANGE DESCRIPTION Type of Gas 0 = methane (default) 1 = GPL Minimum pump modulation 15 100 level * service Maximum pump modula- 20 100 tion level ACTIVATION - SELECTION See section 1 (4.2) Pump temperature differ- Press rest button (D) to access the FA param- ential...

  • Page 38: Adaptation To The Use Of Other Gas

    - Remove the screw (1) that join the burner pack the boiler with a type of gas other (2) to the nozzle manifold (3) than that specifically required in the order, must be performed by Unical professionally qualified personnel, in compliance with the standards and regulations in force.
  • Page 39 Modify parameter FActory: formation required on the label supplied in the documentation envelope and apply it next to the PARAMETER FA par 4.2 technical data label of the boiler. CODE METHAN PROPAN EXAMPLE OF COMPILATION Once the Gt parameter has been edited one must perform the AUTOmatic calibra- tion (change parameter tt) PARAMETER FA par 4.2...

  • Page 40: Adjustment Ta

    4.4.1 - ADJUSTMENT TARATURA MAnu Pressure MAX P1 x 10’’ service Without heat requests, place knobs “B” and “C” to max. Press buton “D” for more 10 sec. and then release ( “SERVICE” flashes). x 3’’ 13.5 service service service Press the ‘’D‘’...
  • Page 41 Pressure MIN P0 service service Turn knob B to MIN, the display will show P0 and the modulation will drop to the minimum preset. Wait few seconds for the pressure value to stabilize. Read the pressure value MIN on the pressure gauge and compare it with the value in the table NOZZLES PRESSURE Chap.

  • Page 42: Adjustment Auto

    4.4.2 - ADJUSTMENT - TARATURA Auto Pressure MAX P1 Enter in FActory parameter to change parameter tt PARAMETER FA par 4.2 (see section 4.2, the access code is required, page ADJUSTMENT - TARATURA 37). CODE MANUal AUTOmatic service service service service Enter the FA parameters, after access code, turn knob “B”...
  • Page 43 14.1 service Turn the ‘’C‘’ knob to the MAX and press the ‘’D‘’ button more time until it is close to the desired value (eg. 82 red on display, which corresponds to 14.1 read on the pressure gauge). NOTE: do not exceed the target of (max + 0,2 mbar) and carry out the adjustment in RISE (the valve gas works better with ever increasing correction).
  • Page 44 service Press button ‘‘D’’ more time until it is close to the desired value (eg. 70 red on display, which corresponds to 1.7 read on the pressure gauge). If the value read on the pressure gauge (eg 1.7) is satisfactory x 2’’...

  • Page 45: Wiring Diagram

    4.5 - wIRING DIAGRAM Practical connection board DK TL TDPA SS SR (1/2) TA 1/OT TA 2 4 3 2 T.ACC CASING E. ACC./RIL. 230 V 50 Hz Return heating sensor A1..A9 Services connectors Domestic hot water probe (Pred. for R models) Modulating pump control TDPA Air pressure transducer Water deficiency safety pressure switch TL 1_2 Safety thermostat 1 and 2...

  • Page 46: Error Codes

    4.6 - ERROR CODES The symbol flashes on the display monitor when the boiler detects an anomaly. 1) In the event of an anomaly that does not stop boiler operation, press key ‘‘D’’ to display the error code; in the event the boiler is in stand-by, the error code appears and remains fixed on the display. 2) In the event of an anomaly that causes boiler down time, the error code flashes directly on the display. Each fault is characterised by a priority level: if two faults are detected at the same time, the code with the highest priority is displayed. The fault codes are listed below: F) Fault code displayed with code number: The display flashes alternating the F (FAULT - ANOMALY) with error code (eg 23). ( Num ) = see key Par. 2.2 COD. REGO- SYMBOL PRIO- DESCRIPTION SOLUTIONS LA FACILE/ RITY STORICO ERRORI EXTERNAL PROBE Check the wiring, if needed interrupted replace the external probe RETURN PROBE Check the wiring, if needed re-...
  • Page 47 SPEED OUT OF Check fan operation (18) and CONTROL the connections Alteration of the fan speed; the speed is above that requested HIGH TEMPERATURE Check pump operation and if Boiler temperature too high needed clean the exchanger (24) wATER DEFICIENCY Fill the heating circuit as de- Insufficient water pressure and scribed in chap.
  • Page 48 PARASITE FLAME Check the wiring of the Ign/Det. Flame detected upon ignition electrode and remove any oxidation. Check for humidity between drain wire and ceramic, if necessary, replace the electrode, press the unblock key, if the anomaly persists, replace the electrode (4).
  • Page 52 - 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.

This manual is also suitable for:

Cor r24Cor c24

Table of Contents