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OBLIGATION!

wear gloves

protective

DANGER!

Danger of burns!

1.2 - SYMBOLS USED IN THE MANUAL

Pay special attention when reading this manual to the parts marked by the symbols:

NOTE!

Tips

for the user

ATTENTION!

Possible dangerous

situation for the product

and the environment

DANGER!

Serious danger

to safety

and health

1.3 - APPROPRIATE USE OF APPLIANCE

The

boiler has been built according to the current level of engineering and acknowledged

technical safety rules.

Nonetheless, if improperly used, dangers could arise for the safety and life of the user

and other persons or damage to the equipment or other objects.

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.

The user must be instructed concerning the use and operation of his heating system, in particular:

• Deliver these instructions to the user, as well as other documents concerning the appliance

inserted in the envelope inside the packaging.

The user must keep this documentation

safe for future consultation.

• Inform the user about the importance of the air vents and the flue gas exhaust system, high

lighting their essential features and the absolute prohibition of modifying them.

• Inform the user concerning controlling the system's water pressure as well as operations to

restore it.

• Inform the user concerning correct temperature control, control units/thermostats and radiators

for saving energy.

• Please note that, in compliance with the standards in force, the inspection and maintenance of

the appliance must be carried out in compliance with the regulations and frequency indicated

by the manufacturer.

• Should the appliance be sold or transferred to a new owner or if you move and leave the ap

pliance, always make sure that the instruction booklet accompanies it in order to be consulted

by the new owner and/or installer.

The manufacturer will not be held liable in the event of damage to persons, animals or

objects resulting from failure to comply with the instructions contained in this manual.

1.4 - INFORMATION PROVIDED TO THE USER

NOTE!

For further details

refer to the Technical

Information:

at the web address

indicated

on page 2

Содержание CoR Series

Страница 1: ...R 24 C 24 CoR INSTALLATION AND SERVICING MANUAL E N G L I S H 0 1 2 3 4 bar MAX M I N MAX MIN bar service CoR...

Страница 2: ...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 f...

Страница 3: ...reatment 8 1 8 Boiler antifreeze protection 9 Attention this manual contains instructions for the exclusive use of the professionally qualified installer and or maintenance technician in compliance wi...

Страница 4: ...t was expressly designed Any other use is to be considered improper and therefore dangerous 1 1 general warnings The instruction booklet is an integral and essential part of the product and must be ke...

Страница 5: ...ser as well as other documents concerning the appliance inserted in the envelope inside the packaging The user must keep this documentation safe for future consultation Inform the user about the impor...

Страница 6: ...h affect the operating safety of the appliance Attention To tighten or loosen the screwed fittings use only appropriate fixed spanners Incompliant use and or inappropriate tools can cause damage e g w...

Страница 7: ...ording to EN 625 EN 13203 1 19 PMW Max domestic hot water operating pressure 20 T max Max domestic hot water temperature C Electrical characteristics 21 Electrical power supply 22 Consumption 23 Prote...

Страница 8: ...tion of fouling or by cor rosive water will not be covered by the warranty 1 7 WATER TREATMENT The treatment of the supply water allows to prevent inconveniences and maintain the functionality and eff...

Страница 9: ...only po sition the two knobs as shown in the figure The Antifreeze protection is always active Even by disabling the heating and domestic hot water services MAX M I N MAX MIN 1 8 BOILER ANTIFREEZE PR...

Страница 10: ...Water deficiency pressure switch CoR C24 15 Filling valve 16 Diverter valve 17 Plate heat exchanger 18 FL FH VM Fan 19 TDPA Air pressure transducer 20 Safety valve 22 SRR Return temperature sensor 23...

Страница 11: ...r inlet G M Heating system flow G R Heating system return G Rc Filling valve Sc Boiler drain Svs Safety valve drain Scond Condensation drain C E ERROR CODES see par 4 6 S E WIRING DIAGRAM KEY see par...

Страница 12: ...12 Flow rate l h Avaible Head mH 2 O 2 3 DIAGRAM OF FLOW RATE PRESSURE AVAILABLE FOR INSTALLATION...

Страница 13: ...operated with Nat Gas G20 Description Symbol Unit CoR R24 C24 Nominal Heat Output Pnominal kW 24 Seasonal space heating energy efficiency s 86 Seasonal efficiency class in heating mode B For CH only...

Страница 14: ...tic hot water circuit pressure bar 0 5 Maximum domestic hot water circuit pressure bar 6 Domestic hot water specific flow rate t 30 C D l min 11 5 Production of D H W in continuous operation with t 45...

Страница 15: ...llation room the appliance must be protected suitably and must be able to operate independently from the air in the room Attention Only mount the appliance on a closed wall made of non flammable mater...

Страница 16: ...animals or ob jects due to failure to comply with the instruction above H P L As well as the appliance the packaging contains A DOCUMENTATION ENVELOPE User operating instructions booklet Instruction...

Страница 17: ...stalled on a vertical and solid wall which can support its weight The wall must not be made of flammable material Since the temperature of the wall on which the boil er is installed and the temperatur...

Страница 18: ...18 33 702 0 1 2 3 4 bar MAX M I N MAX MIN bar service CoR 420 61 70 79 43 51 56 60 4 C F G R M 125 100 80 80 100 80 765 125 125 3 5 1 REFERENCES FOR BOILER POSITIONING...

Страница 19: ...for rear outputs coaxial with socket and bend references for outputs with double pipes 80 references for rear outputs with double pipes and bends 80 kit b reference hydraulic outputs for installation...

Страница 20: ...500 Horizontal exhaust and intake terminals directed outside via coaxial or double pipes C33x C33 TOTAL LENGTH LA intake L Exhaust COAXIAL 60 100 DOUBLE 80 FROM m TO m FROM m TO m 1 6 1 1 25 13A 12S...

Страница 21: ...in the MT013 available on the website ATTENTION For the type of connection B23P the room follows the same installation rules for boilers with natural draught Please note these values relate to exhaus...

Страница 22: ...st 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 b...

Страница 23: ...o must re spect and apply that foreseen by relevant laws in force in the local prescriptions of the supply company Incorrect installation can cause damage to persons animals and objects for which the...

Страница 24: ...tions are watertight after commissioning the boiler see par 3 10 and bringing the system to the operating temperature stop the boiler and repeat the air bleed operations let the system cool down and i...

Страница 25: ...her mostat wires between terminals TA 2 Connect the modulating thermostat wire between terminals TA1 OT after having removed the jumper ON OFF room thermostat connection RT OT Danger Only a qualified...

Страница 26: ...oiler 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 Remember that a bipolar switch must be ns...

Страница 27: ...ssure on the pressure gauge with the pump stopped are any system shut off gate valves open does the gas to be used correspond to the boiler calibration gas otherwise perform the boiler conversion in o...

Страница 28: ...ximum output 1 lluminated symbol When the high flame symbol is fixed on the display and there is an alternation between SP and flow temperature the boiler operates at maximum power Make combustion eff...

Страница 29: ...e gas temperature and content of CO2 taken in the relevant hole 2 Take the measurements with the generator in steady state conditions see par 3 11 1 3 11 2 Posizionamento delle sonde C pipes 80 type B...

Страница 30: ...he pressure socket screw again Check that there are no gas leaks 2 Regolazione alla potenza minima Operate the boiler in calibration mode at MIN MUM OUTPUT see 3 11 1 Once the burner is on check that...

Страница 31: ...ange accettabile per G 20 0 2 mbar range accettabile per G31 ATTENTION Function reserved for Authorised Assistance Centres only The user is NOT authorised to activate the function described below 3 12...

Страница 32: ...inlet valve if closed previously Vent and if necessary restore the heating pres sure until reaching a pressure of 0 8 1 0 bar Open the gas shut off valve Switch the boiler on Make sure the appliance...

Страница 33: ...boiler in safety conditions when overheating Heat the TL until it intervenes and check that it intervenes DK safety pressure switch against water deficiency 13 Does the pressure switch block the boile...

Страница 34: ...if there is no external probe or if it is faulty dS Domestic hot water temperature if there is no sensor or if it is faulty rS Return temperature if there is no auxiliary sensor or if it is faulty dt...

Страница 35: ...he position 01 in which the error is stored DISPLAY Turn knob B to display the sequence of faults between 01 12 EDIT VALUE RESET Enter the error string H01 keep press reset D until the display shows I...

Страница 36: ...le 0 20 C 30 10 C default 10 nr 0 5 30 Night reduction 0 T A default 5 30 night reduction PH 0 1 Domestic hot water pre heat function 0 Not active default 1 Active HP 0 100 Maximum heating modula tion...

Страница 37: ...r ential SP 0 6 Pump pause time during CH DHW service change and vice versa 0 no pause 1 6 Time in seconds AP 1 4 1 Instantaneous boiler 2 Instantaneous boilers with fixed hysteresis 3 Heat only boile...

Страница 38: ...onversion operation that is incor rect or not performed in compliance with the laws in force and or with the instructions given ATTENTION After performing the conversion for the operation of the boile...

Страница 39: ...1 absolute maximum power range 0 100 There are two calibration methods Manu allows an adjustment of the values around the calibrated value approximately 1 5 mbar It is activated with the procedure des...

Страница 40: ...SURE Chap 4 2 for example 14 1 Considering the example shown in the figure having to calibrate the valve to 14 1 mbar it can be concluded that it is a VALUE TOO LOW therefore Turn the C knob to the MA...

Страница 41: ...n the C knob to the INTERMEDIATE position and press the D button for about 2 seconds the new value will flash indicating new storage Turn knob B to MIN the display will show P0 and the modulation will...

Страница 42: ...ce service service x 3 5 6 the writing Au to will appear the burner works at MAX and appears on the display P1 press the D key to display the value eg 31 Read the pressure value MAX on the pressure ga...

Страница 43: ...asing correction If the value read on the pressure gauge eg 14 1 is satisfactory SET Turn the C knob to the INTERMEDIATE position and press the D button for about 2 seconds the new value will flash in...

Страница 44: ...ion of the maximum and completed with the minimum calibration Eventually at the end of the minimum calibration it will be possible to perform a check by moving back to the maximum level using knob B T...

Страница 45: ...al probe connection terminals TA1 OT Modulating TA connection terminals TA2 On off TA connection terminals GND OUT IN R SE BK TA 1 OT TA 2 WH WH Y Y BK BK GND WH SL BK CASING E ACC RIL T ACC A71 2 A5...

Страница 46: ...ER OVERPRESSURE detected if the H2 O pressure Transducer is present with pressure 2 5 bar it is reset automatically when H2 O pres sure 2 bar Wait for the values to return to default limits Replace th...

Страница 47: ...reezing is detected If the heating sensor detects a temperature below 2 C burn er ignition is inhibited until the sensor detects a temperature above 5 C Disconnect the from the power supply close the...

Страница 48: ...e status of the buttons Or repla ce the electronic board F 53 24 Clogged Outlets Check the Chimneys Check the trap BLOCK 28 Control circuit problems Gas Valve Check the Gas Valve connec tions Replace...

Страница 49: ...49 E N G L I S H Installation Instructions...

Страница 50: ...50...

Страница 51: ...51...

Страница 52: ...p A 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 necessar...

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