Unical CoR Series, CoR R24, CoR C24 Installation And Servicing Manual

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CoR

service

MAX

MIN

CoR

R 24 - C 24

ENGLISH

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INSTALLATION AND SERVICING MANUAL

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 o󰀨ers 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 signicant energy and resource savings.

Attention: this manual contains instructions for the exclusive use of the professionally qualied installer

and/or maintenance technician in compliance with current legislation.

The user is NOT qualied 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.

1 GENERAL INFORMATION .............................................................................................................................4

1.1 General warnings ....................................................................................................................................4

1.2 Symbols used in the manual ...................................................................................................................5

1.3 Appropriate use of appliance ...................................................................................................................5

1.4 Information for system manager .............................................................................................................. 5

1.5 Avvertenze per la sicurezza ....................................................................................................................6

1.6 Technical data plate .................................................................................................................................7

1.7 Water treatment .......................................................................................................................................8

1.8 Boiler antifreeze protection ...................................................................................................................... 9

2 TECHNICAL FEATURES AND DIMENSIONS ............................................................................................10

2.1 Technical features .................................................................................................................................10

2.2 Main components view and dimensions ................................................................................................ 10

2.3 Available ow rate / pressure diagram .................................................................................................. 12

2.4 Operation data ....................................................................................................................................... 13

2.4.1 Data according to the directive ErP ............................................................................................. 13

2.5 General features .................................................................................................................................... 14

General information

ENGLISH

3 INSTALLATION INSTRUCTIONS ................................................................................................................ 15

3.1 General warnings ..................................................................................................................................15

3.2 Installation standards ............................................................................................................................ 15

3.3 Preventive system verication and adjustment operations ................................................................... 15

3.4 Packaging .............................................................................................................................................. 16

3.5 Positioning the boiler ............................................................................................................................. 17

3.5.1 References for boiler positioning .................................................................................................. 18

3.6 Flue gas exhaust pipe connection ......................................................................................................... 20

3.7 Connections ..........................................................................................................................................23

3.8 Filling the system ................................................................................................................................... 24

3.9 Electrical connections ............................................................................................................................ 25

3.10 Commissioning ................................................................................................................................... 27

3.11 Measurement of combustion e󰀩ciency during installation ....................................................................28

3.11.1 Calibration function activation ................................................................................................... 28

3.11.2 Probes positioning ....................................................................................................................28

3.12 Burner adjustment ................................................................................................................................. 29

3.12.1 Adaptation of the power to the heating system ......................................................................... 30

4 MAINTENANCE INSTRUCTIONS ...............................................................................................................31

4.1 Inspection and maintenance instructions ..............................................................................................31

4.2 Parameters that can be edited from the control panel .......................................................................... 33

4.3 Adaptation to the use of other gas ....................................................................................................... 38

4.4 Adjustment ta ....................................................................................................................................... 38

4.4.1 Adjustment MANU ........................................................................................................................ 40

4.4.2 Adjustment AUTO ......................................................................................................................... 42

4.5 Wiring diagram ...................................................................................................................................... 45

4.6 Error codes ............................................................................................................................................ 46

Technical Features

Installation Instructions

Maintenance instructions

GENERAL INFORMATION

1.1 - GENERAL WARNINGS

The instruction booklet is an integral and essential part of the product and must be kept by the user.

Read the warnings contained in this instruction

booklet carefully as they provide important guidelines

regarding installation, use and maintenance safety.

Keep the booklet with care for further consultation.

Installation and maintenance must be performed in compliance with the standards in force according to the instructions of the manufacturer,

up to standard and by personnel qualied and certied in compliance with law.

Systems for the production of domestic hot water MUST be constructed entirely with compliant materials.

By professionally qualied personnel we mean: personnel with specic technical skill in the eld

of heating system components for civil use, domestic hot water production and maintenance.

Personnel must have the qualications provided

for by current legislation.

Incorrect installation or improper maintenance can cause damage to persons, animals or objects for which the manufacturer is not responsible.

In case of failure and/or malfunctioning of the appli-

ance, switch it o󰀨 and do not try to repair it or intervene on it directly. Contact only personnel qualied

in compliance with law.

Any repairs must be performed solely by personnel authorised by Unical AG S.p.A., using original spare parts only. Failure to comply with the above can

compromise the safety of the appliance and void

the warranty.

To guarantee appliance e󰀩ciency and its correct

operation, yearly maintenance must be performed

by qualied personnel.

Should you decide not to use the appliance, parts entailing potential sources of hazard must be made safe. Before commissioning an appliance that has not been used, wash the domestic hot water production

system, making the water ow until it has been fully

replaced.

Should the appliance be sold or transferred to a new

owner or if you move and leave the appliance, always

make sure that the instruction booklet accompanies it in order to be consulted by the new owner and/or installer.

Before performing any cleaning or maintenance, disconnect the appliance from the energy mains by acting on the switch of the system and/or through

the specic cut-o󰀨 devices.

Do not obstruct the terminals of the intake/exhaust ducts.

Only original accessories must be used for all appliances with optionals or kits (including electric).

This appliance is intended solely for the use for which it was expressly designed. Any other use is to be considered improper and therefore dangerous (*).

1.2 - SYMBOLS USED IN THE MANUAL

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

DANGER!

Serious danger

to safety

and health

situation for the product

ATTENTION!

Possible dangerous

and the environment

DANGER!

Danger of burns!

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 responsibility. Use according to the intended purposes also includes strict compliance with the instructions in this manual.

NOTE!

Tips

for the user

OBLIGATION!

wear gloves

protective

NOTE!

For further details

refer to the Technical

Information:

at the web address

indicated

on page 2

1.4 - INFORMATION PROVIDED TO THE USER

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 ue gas exhaust system, highlighting 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 appliance, 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.

1.5 - 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 manual. Children should be supervised to ensure that they do not play or tamper with the device.

ATTENTION!

The appliance must be installed, adjusted and maintained by professionally qualied

personnel, in compliance with the standards and provisions in force. Incorrect installation can cause damage to persons, animals and objects for which the manufacturer cannot be held responsible.

DANGER! NEVER attempt performing maintenance or repairs on the boiler on your own initiative. Any work must be done by professionally qualied personnel. We recommend stipulating a maintenance contract.

Insu󰀩cient or irregular maintenance can jeopardise the operating safety of the appliance

and cause damage to persons, animals and objects for which the manufacturer cannot be held responsible.

Changes to the parts connected to the appliance (once the appliance installation is complete)

Do not modify the following parts:

- the boiler

- the gas, air, water and electricity supply lines

- the ue gas pipe, the safety valve and the exhaust pipe

- the construction parts which a󰀨ect the operating safety of the appliance

Attention!

To tighten or loosen the screwed ttings, use only appropriate xed spanners.

Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas leakage).

ATTENTION!

Indications for propane gas-red appliances

Make sure that the gas tank has been deaerated before installing the appliance.

For state-of-the-art tank venting, contact the LPG supplier or person qualied in compliance with the law requirement.

If the tank has not been professionally deaerated, ignition problems could arise.

In that case, contact the supplier of the LPG tank.

Smell of gas

Should a smell of gas be perceived, follow these safety guidelines:

- do not turn electric switches on or o󰀨

- do not smoke

- do not use the telephone

- close the gas shut-o󰀨 valve

- air out the area where the gas leakage has occurred

- inform the gas supplier or a company specialised in installation and maintenance of heating

systems.

Explosive and easily ammable substances

Do not use or store explosive or easily ammable materials (e.g. petrol, paints, paper) in the

room where the appliance is installed.

DANGER! Do not use the appliance as a supporting base for objects.

In particular, do not place receptacles containing liquids (Bottles, Glasses, Jars or Detergents)

on top of the appliance. If the appliance is installed inside a housing, do not insert or rest other objects inside this housing.

1.6 - TECHNICAL DATA PLATE

The CE marking

certies the compliance of the equipment with the essential safety requirements dened in the directives and applicable European regulations and that

its functioning satisfy applicable technical standards.

The CE marking is a󰀩xed to each piece of equipment with an appropriate label.

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

6 = P.I.N.ProductIdenticationNumber 7 = Typesofapproveduegasexhaustcongurations 8 = (NOx)NOxClass

The CE declaration of conformity issued in accordance with international standards by the manufacturer, is placed in documentation envelope supplied with the product.

The technical data plate is located

inside the boiler on the back at the

bottom

A = Heatingcircuitcharacteristics

9 = (Pn) Effective nominal output 10 = (Pcond) Effective output in condensation

11= (Qn)Maximumheatoutput 12= (AdjustedQn)Adjustedforratedheatoutput 13= (PMS)Max.heatingoperatingpressure 14= (Tmax)Max.heatingtemperature

B = Domestichotwatercircuitcharacteristics 15= (Qnw)Ratedheatoutputindomestichotwaterfunction

(if different to Qn)

16= (D)SpecicD.H.W.owrateaccording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 = Protection rating

General information

ENGLISH

D = Countries of destination 24 = Direct and indirect countries of destination 25 = Gas category 26 = Supply pressure

E = Factory settings 27 = Adjusted for gas type X 28 = Space for national brands

G = ErP

29=Seasonalspaceheatingenergyefciency 30 =EnergyefciencyinDHWproductionmode

1.7 - WATER TREATMENT

The treatment of the supply water allows to prevent inconveniences and maintain the functionality and

e󰀩ciency of the generator over time.

The ideal water pH in heating systems

must be within:

VALUE MIN MAX

PH 6.5 8 Hardness [°fr] 9 15

To minimise corrosion, it is crucial to use a corrosion inhibitor; in order for it to work properly, the metal surfaces must be clean. (see system protection ACCESSORIES sect. in domestic price list)

ATTENTION! ANY DAMAGE TO THE BOILER CAUSED BY THE FORMATION OF FOULING OR BY CORROSIVE WATER WILL NOT BE COVERED BY THE WARRANTY.

ATTENTION (*) see general warnings 1.1 The heating only models are NOT suitable for the production of water for human consumption according to Ministerial Decree D.M. 174/2004.

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

For outdoor installations, in partially protected places, you must use the additional heater

kit (optional) for antifreeze siphon cap and DHW hydraulic tings.

Room Temperature led, with resistance kit = -15°C.

MAX

MIN

1.8 - BOILER ANTIFREEZE PROTECTION

To activate the antifreeze function only, po-

sition the two knobs as shown in the gure.

The Antifreeze protection is always active. Even by disabling the heating and domestic hot water services.

This protection can intervene only if the electricity and gas supplies are connected.

If one of the two is not available and

upon reset

11 (SR) a temperature of < 2

°C is detected, the appliance will behave

as described in tab. pos 2.

The heating system can be protected

e󰀨ectively from frost by using antifreeze

products with inhibitor for heating

systems (specic for multidmetal)

Do not use car engine antifreeze products as they could damage the water gaskets.

ENGLISH

(*) Sensor 11 par. 2.2

Power supplies 11 - SR (*) Status

Electric Gas

ON ON < 6 °C ON - Burner and Pump ON until T > 14°C ON ON < 2 °C ON Only when both the power supplies are ON:

ON OFF < 7 °C OFF - Pump ON till T > 10°C OFF ON OFF - Burner and Pump OFF OFF OFF OFF - Burner and Pump OFF

ANTIFREEZE FUNCTION

Actions

function

antifreeze

Technical Features

- Burner and Pump OFF until T > 5°C

- When T > 5°C then Burner and Pump ON until T > 14°C.

TECHNICAL FEATURES AND DIMENSIONS

2.1 - TECHNICAL FEATURES

2.2 -

VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS

CoR C24

NOTE! For further details refer to the Technical Information from the website

KEY

N°

1 db SS Domestichotwatertemperaturesensor

2 FLS Flowswitchwithcoldwaterlter

3 VG Gas valve

4 Fd

8 Expansionvessel

10 HL TL1 Safetythermostat

11 Hb SR Heating temperature sensor

12 Ht P Pump

13 Lp DK Waterdeciencypressureswitch

C.E.

S.E. Description

E.ACC

Ignition/detection electrode

/RIL

15 Filling valve

16 Diverter valve

17 Plateheatexchanger

18 FL

19 TDPA Air pressure transducer

20 Safety valve

22 SRR Returntemperaturesensor

23 HL TL2 Smokesafetythermostat

24 Mono-exchanger

26 Condensation drain trap

Fan

345

bar

MAX

MIN

bar

service

700

420

CoR C24

205

225

125

ENGLISH

View from above

125

27 SL Condensate level sensor

28 LowNoxburner

29 Nozzle

30 Condensing recovery unit

C Domestichotwateroutlet G ½

G Gas inlet G ¾

F Coldwaterinlet G ½

M Heatingsystemow G ¾

R Heating system return G ¾

Rc Filling valve

View from below

Scond

CF G

207

Sc Boiler drain

Svs

Scond

C.E.

Safety valve drain

Condensation drain

=ERRORCODESseepar.4.6

S.E. =WIRINGDIAGRAM

KEY see par. 4.5

70 61130605643

Svs

Technical Features

131

247

2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR INSTALLATION

Avaible Head (mH

Flow rate (l/h)

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

CoR R 24 - C24

Nominal heat input in CH / DHW mode kW 25,0 / 25,0 Minimum heat input with Nat. Gas / Propane kW 7,5 / 8,5 Nominal heat output kW 23,8 Minimum heat output kW 7,0

Nominal output in condensation 50/30 °C kW 24,8 Minimum heat output in condensation 50/30 °C kW 7,2 Combustion e󰀩ciency at full load % 96,4 Combustion e󰀩ciency at part load % 95,9

Heat losses through the casing (min.-max.) % 3,1 - 1,2

(*) Net ue gas temperature tf-ta (max.) °C 58,5 Flue gas mass ow rate (min.-max) g/s 6,6 - 14,1 Air excess λ % 58,7

CO at 0% of O Maximum production of condensate kg/h 4,0 NOx class 6 Chimney heat losses with burner ON (min. - max.) % 4,1 - 3,6 Chimney heat losses with burner OFF % 0,46

Prevalenza disponibile alla base del camino min. / max. Notes: (*) Room Temperature = 20°C Data obtained with appliance operated with Nat Gas (G20)

(min. - max) ppm 33 - 94

% 4,3 - 7,1

Pa 4 / 60

ENGLISH

2.4.1 - DATA ACCORDING TO ErP DIRECTIVE

Description Symbol Unit CoR R24 C24

Nominal Heat Output Pnominal kW 24 Seasonal space heating energy

e󰀩ciency

Seasonal e󰀩ciency class in

heating mode

For CH only and combination boilers: useful heat output

Useful Heat Output in high-temperature regime

(Tr 60 °C / Tm 80 °C) Useful e󰀩ciency at nom. heat output

in high-temperature regime

(Tr 60 °C / Tm 80 °C

Useful heat output at 30% of nom. heat output in low-temperature

regime (Tr 30 °C) Useful e󰀩ciency at 30% of nom. heat

output in low-temperature regime

(Tr 30 °C)

Range-rated boiler: YES / NO NO Auxiliary electricity consumption At full load elmax kW 0,090 At part load elmin kW 0,036 In stand-by mode P

Other items

Heat loss in stand-by P Emissions of nitrogen oxides ref. PCI (PCS) NOx Mg/kWh 22 (20)

Annual electricity consumption Q

For CH & DHW production boilers

Declared load prole - XL Energy e󰀩ciency in DHW production mode ƞ

Daily electricity consumption Qelec kWh - 0,09 Daily fuel consumptionl Qfuel kWh - 22,64 Inside sound power level Lwa dB (A) - Annual electricity consumption AEC kWh 402 Annual fuel consumption AFC GJ 17

Seasonal e󰀩ciency class

in DHW production mode

s % 86

4 kW 23,8

4 % 85,8

1 kW 7,6

1 % 91,3

SB kW 0,003

stb kW 0,1151

HE GJ 79,5

wh % - 86

- A

Technical Features

2.5 - GENERAL FEATURES

CoR

Appliance category Minimum heat. circuit output (∆t 20 °C) l/min Minimum heating circuit pressure bar (kPa) Maximum heating circuit pressure bar (kPa) Primary circuit content l Maximum operating temperature in heat. °C Minimum operating temperature in heat. °C

Expansion vessel total capacity l Expansion vessel pre-load bar

Maximum system capacity (max temp. calc.) l Minimum domestic hot water circuit ow rate l/min.

Minimum domestic hot water circuit pressure bar Maximum domestic hot water circuit pressure bar

Domestic hot water specic ow rate (∆t 30 °C) ‘‘D’’ l/min. Production of D.H.W. in continuous operation with ∆t 45 K Production of D.H.W. in continuous operation with ∆t 40 K Production of D.H.W. in continuous operation with ∆t 35 K Production of D.H.W. in continuous operation with ∆t 30 K Production of D.H.W. in continuous operation with ∆t 25 K (*)

l/min. l/min. l/min. l/min.

l/min. Adjustable DHW temperature °C Voltage/Frequency electric power supply V-Hz Fuse on the power supply A (F)

Protection rating IP

Net weight kg Gross weight kg

F Factor - 1 R Factor - - -

(*) mixed

R 24 C 24

2H3P

0,5 (50)

3 (300)

2,2

174

- 2,0

- 0,5

- 6

- 11,5

- 7,4

- 8,3

- 9,5

- 11,0

- 13,3

35-60

230/50

3,15

X5D

32,3 33,8

35,5 37

INSTALLATION INSTRUCTIONS

3.1 - GENERAL WARNINGS

ATTENTION!

This boiler is intended solely for the use for which it was expressly designed. Any other use is to be considered improper and therefore dangerous.

This boiler heats water at a temperature lower than the atmospheric pressure boiling temperature.

Before connecting the boiler, have professionally qualied personnel:

a) Thoroughly wash all the piping of

the system to remove any residues or impurities which could jeopardise proper operation of the boiler, even from a hygienic point of view.

b) Check that boiler is set up to oper-

ate with the available type of fuel. This can be seen written on the package and on the technical feature plate;

c) Check that the chimney/ue has an

appropriate draught, without any bottlenecks, and that no exhausts from other appliances are inserted,

unless the ue has been implemented to accommodate several utilities according to specic standards and

regulations in force. Only after this check can the fitting between the

boiler and chimney/ue be mounted;

ATTENTION! If there is dust and/or if there are aggressive/corrosive vapours present in the installation 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-ammable materi-

al, at, vertical so that the minimum distances required for installation and maintenance can be observed.

The boiler must be connected to a central heating system and/or domestic hot water supply network compatible with its

e󰀩ciency and output.

The boiler can be installed outdoors in a partially protected place or in any case a place where the boiler is not exposed to direct atmospheric agents.

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler page of

the www.unicalag.it website

ENGLISH

Installation Instructions

3.2 - INSTALLATION STANDARDS

It must be installed by a professionally qualied

technician, who shall take the responsibility of

observing all local and/or national laws published

in the o󰀩cial journal, as well as the applicable

technical standards.

3.3 - PREVENTIVE VERIFICATION AND VERIFICATION AND ADJUSTMENT OPERATIONS

NOTE! For further details relating to the standards, rules and regulations for safe installation of the thermal unit, refer to the section "Technical Information" on the boiler page of the www.unicalag.it website

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler page of the

www.unicalag.it website

3.4 - PACKAGING

The boiler is supplied completely assembled in a sturdy cardboard box.

After having removed the appliance from

the packaging, make sure that the supply is complete and undamaged.

The packaging elements (cardboard box, straps, plastic bags, etc.) must be

kept out of the reach of children as

they are potential sources of danger. 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.

OBLIGATION! wear protective gloves

• The boilers must always be lifted and carried by two people, or a carrier carriage or special transport equipment must be used.

As well as the appliance, the packaging contains:

A DOCUMENTATION ENVELOPE

- User operating instructions booklet

- Instruction booklet for the installer and maintenance engineer

- 2 Spare parts form

- Certicate of conformity

Siphon, (with corrugated pipe and xing strap)

inside the boiler.

depth

380 mm 470 mm 810 mm

L width

H height

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.

- The wall must not be made of ammable material.

Since the temperature of the wall on which the boiler is installed and the temperature of the coaxial exhaust pipe do not exceed, in normal operating conditions, a room temperature beyond 60 K, it is

not necessary to observe the minimum distances from ammable walls.

For boilers with double intake and exhaust pipes, in

the event of crossing ammable walls, insert insulation between the wall and the ue gas exhaust pipe.

ENGLISH

Clearance

(200)

Installation Instructions

765

3.5.1 - REFERENCES FOR BOILER POSITIONING

125 125

125

100

Ø80

Ø100

***

702

MAX

MIN

bar

service

MAX

CoR

bar

420

** references for rear outputs

coaxial, (kit a)

* references for outputs with double

pipes Ø 80.

ENGLISH

** references for rear outputs

coaxial, with socket and bend

* references for rear outputs with double

pipes and bends Ø 80. (kit b)

Installation Instructions

distance from the wall drain safety valve

/ condensate drain

Scond

250

SVS

*** reference hydraulic outputs for

installation with pipe kit 00362526

3.6 - FLUE GAS EXHAUST PIPE CONNECTION

FOR BOILERS WITH FORCED DRAUGHT

To connect the ue gas exhaust pipe, local and national standards must be observed

In the event the boiler is replaced, ALWAYS re-

C13x C13

% Slope towards inlet = 3%

TOTAL LENGTH (LA intake + L Exhaust)

COAXIAL Ø60/100 DOUBLE Ø80

FROM [m] TO [m] FROM [m] TO [m]

1 5 1 + 1

COAXIAL Ø80/125 DOUBLE Ø60

FROM [m] TO [m] FROM [m] TO [m]

1 7 NA NA

Distance between air

inlet pipe and ue gas

exhaust pipe: min 250 mm - max 500

Horizontal exhaust and intake terminals directed outside via coaxial or double pipes..

(13A+12S)

place the ue gas pipe as well.

The boiler is type approved for the exhaust congurations listed below:

C43x C43

Collective chimney ue system, consisting of two pipes, one for combustion air intake and the other

one for combustion products evacuation, coaxial

or double.

C53x C53

C33x C33

C53

NOT ALLOWED C53

TOTAL LENGTH (LA intake + L Exhaust)

COAXIAL Ø60/100 DOUBLE Ø80

FROM [m] TO [m] FROM [m] TO [m]

1 6 1 + 1

(13A+12S)

COAXIAL Ø80/125 DOUBLE Ø60

FROM [m] TO [m] FROM [m] TO [m]

1 8 NA NA

ertical exhaust and intake terminals directed out-

side via coaxial or double pipes.

TOTAL LENGTH (LA intake + L Exhaust)

DOUBLE Ø80 DOUBLE Ø60

FROM [m] TO [m] FROM [m] TOA [m]

1 + 1

(13A+12S)

NA NA

Separate combustion air intake and combustion

products evacuation pipes. These pipes can discharge into areas with di󰀨erent

pressure.

C63x C63

Boiler intended for connection to a combustion air

intake and combustion products evacuation system, approved and sold separately

ATTENTION: The ue must comply with standards

in force.

C83x C83

Connection to a terminal for combustion air intake

and ue gas exhaust via a single or collective

chimney.

B23P

TOTAL LENGTH (LS)

DOUBLE Ø80

FROM [m] TO [m]

1 15

Connection to a combustion products evacuation

pipe outside the room; the combustion air is taken directly from the room where the appliance is installed.

ATTENTION:

For the type of connection B23P the room follows the same installation rules for boilers with natural draught.

ENGLISH

C93x C93

Air / ue gas through concentric pipes in the boiler

room and single pipes in the chimney (combustion air with counterlow in the chimney)

CAUTION LT total length is a reference value

for the dimensioning of the ducts of A (intake) and S (Exhaust). Subtracting

the values of LT reported, at values of

bends* / terminals* / extensions* you

get the value:

if > 0 = OK - POSSIBLE conguration if < 0 = NO - WRONG conguration

Installation Instructions

(*) 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.

20 mm

GENERAL INFORMATION ON THE FLUE GAS EXHAUST SYSTEM

page of the www.unicalag.it website

Rubber closure plugs

for Coaxial

(DO NOT REMOVE)

KIT B sdoppiato Ø 80 = 00364891

00364817

KIT A coaxial Ø 100/60 = 00364813

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.

00364815

00363307

Adapter for double systems

00363902

Coaxial start

NOTE! For further details relating to pressure drops of the individual components, for information on standards,

rules and regulations for proper ue

gas exhaust, refer to the “Technical Information” section on the boiler

Note: Cut at indicated size

Installation Type B22 for outdoor installation

3.7 - CONNECTION

G GAS 3/4’’

Danger!

The gas connection must be carried out

only by a qualied installer who must respect 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 manufacturer cannot be held responsible.

If you smell gas:

a) Do not operate electric switches, the telephone or any other object that may cause sparks; b) Immediately open doors and windows to create air current to purify the room; c) Shut the gas cocks.

Condensation drain

The boiler, during the combustion process, produces

condensation that, through pipe “A”, ows into the

trap.

The condensation that forms inside the boiler ows into a suitable drain via pipe “B”.

Danger!

Before commissioning the appliance:

- check that the trap is assembled properly, make sure that the inner

plastic tube passes under the pump (not near the plate heat exchanger).

- Check that the condensation is drained properly, if the appliance is used with the condensate drain

siphon, without the protection device

C (sphere) inserted, there is danger of intoxication following out exhaust gases.

ENGLISH

M FLOW 3/4’’ R RETURN 3/4’’

C HOT 1/2’’ F COLD 1/2’’

Sc BOILER DRAIN S.cond CONDENSATION DRAIN Rc FILLING VALVE Svs SAFETY VALVE DRAIN

Provide a drain pipe with funnel and a

trap that lead to a suitable drain, in cor-

respondence of Svs.

This drainage must be controlled on sight.

If this precaution is not taken, triggering of the safety valve can cause damage to persons, animals and objects, for which the manufacturer cannot be held responsible.

Installation Instructions

The mains pressure must be within 1 and 3

bar (in the event of greater pressure install

a pressure reducer).

Condensation outlet, pipe to be connected to the drainage system

The connection between the appliance and the domestic waste system must

be made in compliance with the specic

reference standards.

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler page of

the www.unicalag.it website

3.8 - FILLING THE SYSTEM

Attention! Do not mix the heating water with incorrect concentrations of antifreeze or anti-corrosion substances! This could

damage the gaskets and cause noise

during operation. Unical will not be held liable for damage to persons, animals or objects due to failure to comply with the above instruction.

When the system connections have been completed, the circuit can be lled.

This operation must be performed carefully, respecting the following phases:

- open the radiator vent valves and make sure the automatic valve is working properly in the boiler.

- open the lling tap gradually, making sure that the automatic air release valves installed on the

system work properly.

- close the radiator air release valves as soon as

water comes out.

- check the pressure gauge until pressure reaches approximately 0.8/1 bar.

- close the lling tap and bleed air once again through the radiator air release valves.

- make sure that all the connections 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, if necessary, return the water pressure to 0.8/1 bar.

(See par. 4.4).

Danger of burns!

Attention to contact with ow pipe M

and (if boiler combi) with hot water outlet pipe C.

3 2 1

TA 1/OT TA 2

ON-OFF

3.9 - ELECTRICAL CONNECTIONS

Danger! Only a qualied technician may perform the electrical installation. Before performing connections or

any type of operation on electrical parts, always

disconnect electrical power and make sure that

it cannot be reconnected accidentally.

00330914

ATTENZIONE!

ATTENTION!

ACHTUNG!

ATENCIÓN!

ATTENTIE!

UPOZORNÌNÍ!

！

230 V

ENGLISH

ON/OFF room thermostat connection (*)

ON/OFF room thermostat connection RT/OT (*)

Installation Instructions

- Remove the jumper and connect the room thermostat wires between terminals TA 2.

- Connect the modulating thermostat wire between

terminals TA1/OT after having removed the jumper.

External probe connection (*)

- Predisposed on the terminal board, terminals

Electric power supply connection

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.

Remember that a bipolar switch must be

nstalled on the boiler power line with over

3 mm between contacts, easy to access,

making maintenance quick and safe.

The power cable must be replaced by technical personnel authorised by UNI- CAL AG S.p.A., using original spare parts

only. Failure to comply with the above can

jeopardise the safety of the appliance.

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler page of

the www.unicalag.it website

3.10 - COMMISSIONING

Commissioning must be done by profes-

sionally qualied personnel. Unical AG

S.p.A. will not be held liable for damage to persons, animals or objects due to

does the installation meet the specic standards and regulations in force, both relating to the

gas part as well as the electrical part?

do the combustion air intake and ue gas exhaust take place properly according to what is dened by the specic rules and regulations in force?

is the fuel supply system sized according to the capacity required by the boiler? Is it equipped with all safety and control devices required by the standards in force?

is the power supply of the boiler 230V - 50Hz?

has the system been lled with water (approximately 0.8/1 bar pressure on the pressure gauge

with the pump stopped)?

are any system shut-o󰀨 gate valves open?

does the gas to be used correspond to the boiler calibration gas?: otherwise, perform the boiler

conversion in order to use the gas available (see section: 4.3”); this operation must be carried out by technical sta󰀨 qualied in compliance with the standards in force;

is the gas supply valve open?

failure to comply with the above instruction.

Before commissioning the boiler, check that:

ENGLISH

has the system been checked for gas leaks?

is the outside main switch ON?

is the system safety valve e󰀩cient and is it connected to the drains?

is the condensation drain trap connected to the drains?

has the system been checked for water leaks?

are the ventilation conditions and minimum distances to perform any maintenance

ensured?

have the GAS, HEATING and DOMESTIC HOT WATER pipes been cleaned thoroughly with

products suitable for each circuit?

has a surveillance and protection system against gas leaks been installed? (Optional)

are the system pipes NOT used as the electrical system earthing?

has the system been sized properly bearing in mind the radiator pressure drops?

thermostatic valves, radiator stop valves

has the operator been trained and has the documentation been supplied?

Installation Instructions

Please tick the operations performed

Switching boiler on and off

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

3.11 - MEASUREMENT OF COMBUSTION EFFICIENCY DURING INSTALLATION

x 5’’

3.11.1- ACTIVATION OF THE CALIBRATION FUNCTION

ATTENTION! Function reserved for Authorised Assistance Centres only.

The user is NOT authorised to activate the function described below.

1 ACTIVATION

By pressing the button (D) for 5 seconds

SErvice appears,

Do not press it for more than

9’’ (par. 4.2) This function is not activated if there is

a block or domestic hot water request .It is possible to dispose of heat on the sanitary circuit by opening 1 or more hot water taps.

all the symbols on the display ash

, until

3 MINIMUM OUTPUT

MAX

By turning the knob (B) in position , the boiler will operate at minimum output:

- 1 lluminated symbol

and there is an alternation between SP and ow temperature, the boiler operates at minimum power.

Make combustion e󰀩ciency

2 MAXIMUM OUTPUT

MAX

By turning the knob (B) onto MAX, the boiler will operate at maximum output:

- 1 lluminated symbol

When the high ame symbol is xed on the display

and there is an alternation between SP and ow temperature, the boiler operates at maximum power.

Make combustion e󰀩ciency

4 DISABLING

The “calibration” function stays active for 15 minutes.

To disable the CALIBRATION function before the time elapses press the button (D) for 5 seconds

until the ‘SERVICE’ symbol appears

and then release. Do not press for more than 9 seconds.

3.11.2 - POSIZIONAMENTO DELLE SONDE

To determine the combustion e󰀩ciency

one must make the following measurements:

- measurement of the combustion air temperature

taken in the relevant hole 1.

- measurement of the ue gas temperature and

content of CO2 taken in the relevant hole 2.

COXIAL PIPES

Air probe

Take the measurements with the generator in

steady state conditions (see par. 3.11.1).

N.B.: Insert smoke probe only after

ignition of the burner, in order to avoid the saturation of the analizer cells.

SEPARATE PIPE

ENGLISH

Air probe

Flue gas probe

PIPES Ø 80 TYPE B22

Air probe

Flue gas probe

Installation Instructions

Flue gas probe

3.12 - ADJUSTING THE BURNER

Attention, during these operations do not take

any samples in domestic hot water mode.

All boilers leave the factory already calibrated and tested, however in the event the gas valve recalibration is required:

- Loosen the needle screw ‘’P’’ located inside the

pressure socket at gas valve outlet and connect a pressure gauge with reference to the gure.

- Check the supply pressure value (see NOZZLES

- PRESSURES table).

The following instructions are intended

exclusively for Unical AG Sp.A. authorised service personnel.

Reading value

Maximum / minimum pressure

1) Maximum output adjustment

- Operate the boiler in “calibration” mode at MAXI-

MUM OUTPUT (see 3.11.1).

- Once the burner is on check that the “MAXIMUM”

pressure value corresponds to that indicated in the table “NOZZLES - PRESSURE”.

- Should it not correspond, correct it (see calibration procedure Cap. 4.4)

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 the “MINIMUM”

pressure value corresponds to that indicated in the table “NOZZLES - PRESSURE”.

- Should it not correspond, correct it (see calibration procedure Cap. 4.4)

3) Conclusione delle tarature di base

- once the gas valve minimum and maximum pres-

sure values are checked

- disable the timed “calibration” function by switching

o󰀨 the main switch.

- Remove the exible tube from the pressure gauge and close the pressure socket screw

again.

- Check that there are no gas leaks.

36 35 34 33 32 31 30

29 28 27 26 25 24 23 22

21 20 19 18 17 16 15 14 13 12

11 10

20 30 40 50

60 70

NOZZLES - PRESSURE - COLLECTOR TABLE

Check the burner pressure levels especially at low ow rates. The values in the table refer to a closed combustion chamber.

CoR R 24 - CoR C 24

Type of

Gas

Gas nat. (G20) 7,0 ÷ 23,8 7,5 ÷ 25,0 20 0,86 24 - 1,7 14,1 0,79 m³/h 2,64 m³/h

Propano (G31) 7,9 ÷ 23,8 8,5 ÷ 25,0 37 0,55 24 - 4,1 30,3 0,66 kg/h 1,94 kg/h

(*) ± 0,2 mbar range accettabile per G 20 (*) ± 0,2 mbar range accettabile per G31

3.12.1 - ADAPTATION OF THE POWER TO THE HEATING SYSTEM

Power

output

[kW]

ATTENTION! Function reserved for Authorised Assistance Centres only. The user is NOT authorised to activate the function described below.

Power

input

[kW]

Supply

Pressure

[mbar]

Nozzles

[mm]

Nozzles

no.

Ø Col-

lector

[mm]

Pressure

minimum

[mbar]

Pressure

operating

[mbar]

Consumption

min.

Consumption

max.

ENGLISH

It is possible to adjust the maximum thermal capacity in heating mode, by decreasing the burner pressure

value

Use the HP parameter (paragraph 4.2 SE parameter

list) to obtain the value corresponding to the desired

power.

Ex: CoR 24 to depower the boiler 20 kW,

modify parameter HP (about

70)

CoR 24

Installation Instructions

9 8

6 5 4 3

HP %

MAX

bar

service

I/L

MIN

INSPECTION AND MAINTENANCE

Inspections and maintenance performed professionally and according to a regular schedule, as well as the use of original spare parts, are of the utmost importance for fault-free operation of the boiler and to guarantee its long life. Yearly maintenance of the appliance is mandatory in compliance with Laws in force.

4.1 - INSPECTION AND MAINTENANCE INSTRUCTIONS

To assure long-term functioning of your appliance

and to avoid altering its approved status, only original

Unical spare parts must be used.

If a component needs to be replaced:

• Disconnect the appliance from the electrical mains

and make sure that it cannot be reconnected accidentally.

• Close the gas shut-o󰀨 valve upstream the boiler.

• If needed, and depending on the intervention to be carried out, close any shut-o󰀨 valves on the ow and return line of the heating system, as well as the cold water inlet valve.

• Remove the front casing from the appliance.

Failure to perform Inspections and Maintenance can entail material and personal damage.

• Vent and, if necessary, restore the heating pressure until reaching a pressure of 0.8/1.0 bar.

• Open the gas shut-o󰀨 valve.

• Switch the boiler on

• Make sure the appliance is gas tight and water-

tight.

• Remount the front casing of the appliance.

Once all maintenance operations are complete resume boiler operation.

• Open the heating ow and return pipes, as well as the cold water inlet valve (if closed previously).

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 0 1 2 3 4 5 6 7 8 9

0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987

10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153

20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466

30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584

40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768

50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596

60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824

70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304

80 1263 1222 1183 1146 1110 1075 1042 1010 979 949

90 920 892 865 839 814 790 766 744 722 701

Relation between the temperature (°C) and the nom. resistance (Ohm) of the heating probe SR and of the domestic hot water probe SS

Example: At 25°C, the nominal resistance is 10067 Ohm At 90°C,the nominal resistance is 920 Ohm

ROUTINE YEARLY VERIFICATION OPERATIONS

COMPONENT: VERIFY: CONTROL/INTERVENTION

METHOD:

FL (domestic hot water

Is the minimum domestic hot water

ow rate 3 l/min.?

The burner must ignite with an

intake above or equal to: 3 l/min.

priority ow switch ( 2 )

(Gas valve) ( 3 )

SR (heating sensor)( 11 ) SS (domestic hot water sensor)

( 1 )

SSR (return sensor) ( 22 )

E ACC/RIV. (ignition/detection electrode) ( 4 )

TL (anti-overheating

limit thermostat) ( 10 )

DK (safety pressure switch

against water deciency) ( 13 )

Does the valve modulate properly? Open a hot water tap at maxi-

mum ow rate and then at minimum. Make sure that the ame

modulates.

Do the sensors maintain the original characteristics?

Disconnect the sensor, place it in the room, measure the resist-

ance value and, through the table Res / Temp (previous page),

check that it corresponds to the room temperature measured by a thermometer

Does the discharge of sparks before putting the boiler in safe conditions last less than 10 sec.?

Does the TL put the boiler in safety

conditions when overheating?

Does the pressure switch block the boiler if the water pressure is below 0.4 bar?

Detach the electrode ionisation wire and check the securing time.

Heat the TL until it intervenes and check that it intervenes.

Without request: close the shuto󰀨 valves of the heating circuit, open the drain valve to make the

water pressure decrease. Before pressurising again, check the

pressure of the expansion vessel.

ENGLISH

Expansion vessel ( 8 ) Does the vessel contain the right

amount of air?

Check the pressure in expansion

vessel (1 bar when the boiler is empty). Pressurise the boiler (open the pump automatic vent valve). Open the heating circuit closing valves.

Condensation drain trap (26) Has the trap got deposits on the

Clean the trap with water.

bottom?

Domestic hot water ow rate Filter in cold water inlet ( 2 ) Clean the lter with limescale

remover.

Heat exchanger body (24 ) Check that the space between the

rungs of the exchanger are not clogged

Eliminate the deposits without damaging the exchanger, using

a soft bristle brush and specic, non ammable detergents.

Burner ( 28 ) Check the state of cleanliness of the

burner mesh

Remove any deposits using

compressed air, blowing from the mesh side.

( Num ) = see key Par. 2.2

Installation Instructions

4.2 - PARAMETERS THAT CAN BE EDITED FROM THE CONTROL PANEL

ATTENTION! Function reserved for Authorised Assistance Centres only.

Menu access:

InF InFormation Hi Errors Log SE SErvice FA Factory tA tAratura _CALIBRATION

1 ACTIVATION - SELECTION

DISPLAY

Turn knob (B) to display the parameter list InF

PARAMETERS LIST InF

Press reset buton (D) for 10 sec. then release (service ashing)

Turn knob (B)

service

to scroll through the menu’

service

The display alternates the Parameter and Value

CODE DESCRIPTION

ICH

Heating temperature, - - if the heating sensor is faulty

External temperature, - - if there is no external probe or if it is faulty

Domestic hot water temperature, - - if there is no sensor or if it is faulty

Return temperature, - - if there is no auxiliary sensor or if it is faulty

Di󰀨erential ∆t between ow and

return.

Heating temperature calculated,

(been ‘‘room zone’’ ON-OFF and ‘‘remote zone’’ OT+.)

Air Fan signal pressure

(Pa)

INFORMATION

Press reset (D) to access the Inf parameters unit

Water pressure, is there is not pressure sensor, - - is displayed

Firmware version (Factory)

Firmware version (Servicing)

Ionization Current (µA)

(Hi) Errors Log

x 10’’

ATTIVAZIONE - SELEZIONE Vedi punto 1 (4.2)

Premere il tasto (D) per accedere al gruppo parametri Hi,

DISPLAY - FAULT

Press reset button (D) to display the fault code (see chap.5).

ENGLISH

The display alternates H and the number of the position (01) in which the error is stored.

DISPLAY

Turn knob (B) to display the sequence of faults between 01 ÷ 12

PARAMETERS LIST (Hi) Errors Log

Position Description

01 02

last error displayed

penultimate error displayed

01 = last error

displayed

EDIT VALUE - RESET

08 = fault code (LP Water deciency)

ref. chap. 4.6

Enter the error string H01 keep press reset (D) until the display shows INF,

This operation must only be performed in the

event one wants to delete the log completely (for

example, if important updates are made it may

therefore be useful to have a new chronological reference of events).

o reset the whole errors log.

Installation Instructions

03 04 05 06 07 08 09 10

last but two error displayed

................error displayed

................error displayed.

............... error displayed

third error displayed

second error displayed

rst error displayed

DISABLING

Briey (2 ÷ 5 sec.) press the key (D) to go back to the main menu See section 1 (4.2), or press it for

over 5 seconds to exit.

(SE) Service parameters

ACTIVATION - SELECTION See section 1 (4.2)

Press reset buton (D) to access the SE parame- ters unit. These parameters can be edited without restrictions, from the control panel.

DISPLAY

EDITING THE VALUE

Press reset buton (D) to access the parameter, the parameter value ashes. Correct the value with knob (C)

(Counterclockwise - Clockwise)

4 CONFIRM VALUE

Turn knob (B) to display the parameters list

PARAMETERS LIST SE CODE RANGE DESCRIPTION

Post circulation

0 1

-20 10

0 30

0/5 30

0 1

0 100

20 50

50 85

25 45

50 65

0 = post 5’’ (default) 1 = continuous

External probe on panel

- 20÷10 °C

External probe on Regolafacile

0 = - 20 °C 30 = +10 °C (default 10)

Night reduction

0 = T.A. (default) 5 ÷ 30 = night reduction

Domestic hot water preheat function

0 = Not active (default) 1 = Active

Maximum heating modula-

tion level (default 100)

Minimum heating set point

level (default 30)

Maximum heating set point

level (default 85)

Minimum domestic hot water

set point level (default 35)

Maximum domestic hot water

set point level (default 60)

(default -10)

Press key D

(FA) Factory Parameters

service

ACTIVATION - SELECTION See section 1 (4.2)

Press rest button (D) to access the FA param- eters unit. These parameters can be edited by entering the ACCESS CODE.

ACCESS CODE

UNIT 1 - FA PARAMETERS LIST

CODE RANGE DESCRIPTION

Type of Gas

0 1

15 100

20 100

5 20

0 6

1 4

0 1

15 60

0 = methane (default) 1 = GPL

Minimum pump modulation

level *

Maximum pump modula-

tion level Pump temperature di󰀨er-

ential

Pump pause time during CH / DHW service change and vice-versa 0 = no pause 1÷6 = Time in seconds

1: Instantaneous boiler

2: Instantaneous boilers with

3: Heat. only boiler / or storage tank (1 pump +

1 3-way val.)

4: Boiler with storage tank 2 pumps

Heat. pressure sensor

0 = absent / 1 = present

(default 0) Ignition air pressure

(default 30)

xed hysteresis

ENGLISH

Use knobs to dial the code (B - TENS) - (C UNITS)

Conrm with the reset button (D) Once the access code has been entered, Fac-

tory parameter units are displayed

DISPLAY

Turn knob (B) to scroll the parameters.

0 60

0 1

1 9

0 1

0 10

1 20

1 50

1 20

O󰀨set Air (default 20)

Primary Dt protection 0 = disabled 1 = enabled

(default 1)

Type boiler / Power

(befault 1) Function antilegionella

storage tank boiler (w3/W4) Mantenimento richiesta

sanitaria Heating control:

proportional Heating control:

integrative

Heating control:

derivative

Domestic hot water control: proportional

Domestic hot water

control: integrative

Domestic hot water

control: derivative

Installation Instructions

3 90

0 20

Ramp time CH

(Value *10) = sec

Adjustment code (default 0)

- manual (set = 0)

- automatic (set = 5)

4.3 - ADAPTATION TO THE USE OF OTHER GAS

The boilers are produced for the type of gas specically requested upon ordering.

DANGER! The conversion for the operation of the boiler with a type of gas other

than that specically required in the

order, must be performed by Unical

professionally qualied personnel, in

compliance with the standards and regulations in force. The manufacturer cannot be held liable for any damage resulting from a conversion operation that is incorrect 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 boiler with a type of gas (e.g. propane gas) other than

that specically requested when ordering, the appliance will only work

with this new type of gas.

ATTENTION! Indications for propane gas-fired appliances

Make sure that the gas tank has been

deaerated before installing the appliance. For state-of-the-art deaeration of the

tank, contact the LPG supplier or a person qualied in compliance with

law.

If the tank has not been professionally

deaerated, ignition problems could arise.

In that case, contact the supplier of

the LPG tank

To convert the boiler from one type of gas to

another, proceed as follows:

- Disconnect the appliance from the elctrical power supply

- Remove the screw (1) that join the burner pack

(2) to the nozzle manifold (3)

- Disconnect the gas pipe above the gas valve.

- Extract the nozzle manifold (3) and replace it with

the one contained in the gas conversion kit.

- Once the manifold has been replaced, re_mount

it all andg ive the power supply.

Modify parameter FActory:

posizione

conferma

PARAMETER FA par 4.2

CODE METHAN PROPAN

formation required on the label supplied in the documentation envelope and apply it next to the

technical data label of the boiler.

0 1

Once the Gt parameter has been edited one must perform the AUTOmatic calibration (change parameter tt)

PARAMETER FA par 4.2

TARATURA - ADJUSTMENT

CODE MANUal AUTOmatic

0 5

- Perform calibration AUTOmatic cap. 4.4.1.

- when the conversion is complete, ll in the in-

4.4 - ADJUSTMENT _TARATURA tA

The Gas Valve does not provide mechanical calibration; the minimum and maximum power settings are then electronically performed through two parameters

(visible and modiable during calibration):

EXAMPLE OF COMPILATION

ENGLISH

- P0 absolute minimum power; range 0 ÷ 100

- P1 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 described in

section 4.4.1 (recommended procedure in most cases).

- “Auto” allow reset of the previous values and the

complete calibration of the gas valve (typical use in case of valve replacement or gas transformation). It is activated with the procedure shown

in section 4.4.2

Function / description of knobs and ‘’ D ‘’ key in calibration function

per memorizzare

position to

decrease

value

MAX

MIN

position

to set

the value

il valore

MAX

Installation Instructions

position to inecrease

value

tasto di

scelta

button of

conrmation /

choice

P0 potenza minima

minimum power

potenza

massima

maximum

power

posizione per diminuire il valore

posizione per

aumentare

il valore

x 10’’

4.4.1 - ADJUSTMENT TARATURA MAnu

Pressure MAX P1

MIN

MAX

Without heat requests, place knobs “B” and “C” to max. Press buton “D” for more 10 sec. and then release ( “SERVICE” ashes).

MAX

service

x 3’’

service

13.5

Press the ‘’D‘’ key for 3 sec. and Manu scrolling writing appears, the burner works at MAX and appears P1 on display press the ‘’D‘’ key to display the value (eg. 76). Read the pressure value MAX on the pressure gauge and compare it with the value in the table NOZZLES PRESSURE Chap. 4.2 (for example, 14.1). Considering the example shown in the gure, having to calibrate the valve to 14.1 mbar it can be concluded

that it is a VALUE TOO LOW therefore:

14.1

MIN

MAX

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). If the value read on the pressure gauge (eg 14.1) is satisfactory,

x 2’’

service

MIN

MAX

SET: Turn the ‘’C‘’ knob to the INTERMEDIATE position and press the ‘’D‘’ button for about 2 seconds

(the new value will ash indicating new storage).

Pressure MIN P0

ENGLISH

1.2

MAX

MIN

service

MAX

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. 4.2 (eg 1.2). Considering the example shown in the gure, having to calibrate the valve at 1.7 mbar can be concluded

that this is a VALUE TOO LOW therefore:

1.7

MIN

MAX

Turn the ‘’C‘’ knob to the MAX and press the ‘’D‘’ button more time until it is close to the desired value (eg. 72 red on display, which corresponds to 14.1 read on the pressure gauge).

If the value read on the pressure gauge (eg 1.7) is satisfactory,

service

Installation Instructions

x 2’’

service

MIN

SET: Turn the ‘’C‘’ knob to the INTERMEDIATE position and press the ‘’D‘’ button for about 2 seconds

(the new value will ash indicating new storage).

MAX

4.4.2 - ADJUSTMENT - TARATURA Auto

Pressure MAX P1

Enter in FActory parameter to change parameter tt

(see section 4.2, the access code is required, page

37).

PARAMETER FA par 4.2

ADJUSTMENT - TARATURA

CODE MANUal AUTOmatic

service

service service

MAX

MIN

0 5

MAX

Enter the FA parameters, after access code, turn knob “B” to max until “tt” parameter is reached, press button “D”, modify the value 00 in 05 by means of the “C” knob and then conrm by pressing the “D” button.

service

x 3’’

service

Press the “D” button for about 3“; “tA” menu will appear again. Activate the calibration function by pressing the “D” button for about 3“;

x 3’’

service

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 gauge and compare it with the value in the table NOZZLES PRESSURE Chap. 4.2. (ed. 14.1). Considering the example shown in the gure, having to calibrate the

valve to 14.1 mbar it can be concluded that it is a VALUE TOO LOW therefore:

14.1

MIN

MAX

service

x 2’’

service

MIN

MAX

ENGLISH

SET: Turn the ‘’C‘’ knob to the INTERMEDIATE position and press the ‘’D‘’ button for about 2 seconds

(the new value will ash indicating new storage).

Pressure MIN P0

MAX

MIN

service

MAX

service

Installation Instructions

6.0

Turn knob B to MIN, the display will show P0 and the modulation will drop to the minimum preset.

that this is a VALUE TOO LOW therefore:

1.7

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’’

MIN

MAX

service

SET: Turn the ‘’C‘’ knob to the INTERMEDIATE position and press the ‘’D‘’ button for about 2 seconds

(the new value will ash indicating new storage).

N.B. It is important to proceed rst with the calibration 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”.

- To exit, disconnect the power supply.

- Close any domestic hot water tap

- Disconnect the pressure gauge and close the pressure relief of the Gas Valve well.

(GND)

(OUT)

(IN)

TA 1/OT TA 2

CASING

E. ACC./RIL.

T.ACC

12A52143 65

21 43 5

2 1

678

MVD

(CH)

(DHW)

230 V 50 Hz

CMP

MODULAT

(+12 V) NOT USED

COMNO

SRRDKTL (1/2)

678

TDPA FLS SS SR

EV2

EV1

(Mod)

(On/Oﬀ)

+-+-

3 4 5

4.5 - WIRING DIAGRAM Practical connection board

ENGLISH

Installation Instructions

KEY

A1.....A9 Services connectors

CMP Modulating pump control DK Waterdeciencysafetypressureswitch

E.ACC./RIL Ignition/detection electrode

FLS Domestichotwaterrequestowswitch MVD Diverter valve motor P Pump SL Condensate level sensor

SR Flowheatingsensor

SRR Returnheatingsensor

SS TDPA Air pressure transducer TL 1_2 Safetythermostat1and2

Domestichotwaterprobe(Pred.forRmodels)

VG Gas valve V Modulating fan

SE Externalprobeconnectionterminals TA1 / OT Modulating TA connection terminals TA2 On/off TA connection terminals

4.6 - ERROR CODES

Thesymbolashes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xedonthedisplay.

2)Intheevent ofananomalythatcausesboilerdowntime,the errorcodeashes 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ashesalternatingtheF(FAULT-ANOMALY)witherrorcode(eg23).

SYMBOL PRIO-

COD.REGO-

LA FACILE/

STORICO

ERRORI

RITY

09 0 EXTERNAL PROBE

( Num ) = see key Par. 2.2

DESCRIPTION SOLUTIONS

Check the wiring, if needed

interrupted

replace the external probe

14 1

RETURN PROBE

Auxiliary (SRR) sensor interrupted

45 2

WATER OVERPRESSURE

detected if the H2O pressure Transducer is present with

pressure > 2.5 bar; it is reset

automatically when H2O pressure < 2 bar

30 3 SERVICE PARAMETERS

Service parameters altered due

to possible electromagnetic interferences.

21 4 POOR WATER CIRCULATION

Poor circulation in primary

circuit

17 5 FLAME CONTROL FRE-

QUENCY BEYOND LIMIT

Depends on the power supply

mains (Frequency and voltage

beyond default limits)

15 6 WATER CIRCULATION IN-

SUFFICIENT

Primary circuit water circulation insu󰀩cient (∆t > 35° C)

22 7 INCORRECT SENSOR PO-

SITIONING Flow and return

sensors inverted

24 8 SPEED OUT OF

CONTROL

Alteration of the fan speed; the speed is not reached.

Check the wiring, if needed replace the auxiliary sensor (22)

Wait for the values to return to

default limits / Replace the Transducer

Reset the altered parameters via the panel and/or regolafacile

Check pump operation (12) and speed, if there are any obstructions or system closure.

Wait for the values to return to

the default limits

Check pump operation (12) and speed - remove any heating system obstructions - clean the scaled domestic hot water exchanger

Check the wiring (21) (22)

Check fan operation (18) and the connections

26 9 SPEED OUT OF

CONTROL

Alteration of the fan speed; the

speed is above that requested

Check fan operation (18) and the connections

6 10 HIGH TEMPERATURE

Boiler temperature too high

WATER

11 WATER DEFICIENCY

Insu󰀩cient water pressure and consequent intervention of the

minimum water pressure - pressure switch ( 13 ).

WATER

WATER PRESSURE

detected if the pressure Transducer is present

16 13 EXCHANGER

FREEZING ( 24 )

Exchanger freezing is detected If the heating sensor detects a temperature below 2° C, burner ignition is inhibited until the sensor detects a temperature

above 5°C.

13 14

DOMESTIC HOT WATER SENSOR

Domestic hot water sensor fault (1)

12 15 HEATING SENSOR (11)

Heating sensor fault

Check pump operation and if needed clean the exchanger (24)

Fill the heating circuit as described in chap. 3.8 and wait

for the values to return within

default limits. If needed, check the electrical connections and replace the minimum water pressure switch.

Wait for the values to return

to default limits / Replace the Transducer

Disconnect the from the power supply, close the gas

valve, defrost the exchanger

carefully.

Check the efficiency of the sensor (see table Res/Temp)

(Par.4) or its connections.

Check the efficiency of the sensor (see table Res/Temp)

(Par.4) or its connections.

ENGLISH

38 16 FACTORY PARAMETERS

Alteration of the factory parameters due to possible electromagnetic interferences.

LIMIT

THERM

BLOCK

SAFETY THERMOSTAT

Intervention of the safety thermostat (10)

18 BLOCK

No gas or failed burner ignition

Press the unblock key; if the

anomaly persists, replace the board.

Installation Instructions

Press the unblock button on

the panel and/or check that the thermostat or its connections are not interrupted.

Check the gas supply or that the ignition/detection electrode is working properly (4).

service

11 19 PARASITE FLAME

Flame detected upon ignition

20 20 FIAMMA PARASSITA

Fiamma rilevata dopo lo spegnimento

(F) 27 22

ERROR Flow Gradient

Check the wiring of the Ign/Det.

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).

Vericare il cablaggio ed eventuali perdite della valvola gas (3) event. sostituire Valv. gas.

Check if the pump switches o󰀨

suddenly.

(F) 23 23

Detected tab panel button pressed for longer than 30 “

Check keypad and reset the status of the buttons. Or replace the electronic board

(F) 53 24

service

BLOCK 28

service

BLOCK 32

Clogged Outlets Check the Chimneys / Check

the trap.

Control circuit problems

Gas Valve

Gas Valve opening time beyond

limit time

Check the Gas Valve connections / Replace the Gas Valve

(3) / Replace the Modulation Board

Check the parts that generate

the heat requests (thermostats, electrovalve limit switches, ow

switch, etc.)

service

BLOCK

Flame loss Check the electrode and its wi-

General block for unclassied

anomalies.

ERRORS DISPLAYED ON REGOLAFACILE ONLY

- 75 -

- 80 -

- 81 -

Regolafacile external sensor Replace the external probe /

Regolafacile Internal Sensor Replace Regolafacile Eprom Error of Regolafacile Replace Regolafacile

ring to check the gas pressure at minimum power, if necessary re-calibrate.

Replace Modulation Board.

Regolafacile

ENGLISH

Installation Instructions

www.unical.eu

ed. 12/18

ORIGINAL INSTRUCTIONS - 00337853EN - 1

46033 casteldario - mantova - italia - tel. +39 0376 57001 - fax +39 0376 660556

Also reserves the right to bring those changes that it will hold necessary to it own products or prots, without jeopardizing its essential characteristics.

AG S.p.A.

info@unical-ag.com - export@unical-ag.com - www.unical.eu

Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press.

Unical CoR Series, CoR R24, CoR C24 Installation And Servicing Manual

Specifications and Main Features

Frequently Asked Questions

User Manual