Unical !DEA Installation guide

ITALIANOENGLISH

ISTRUZIONI PER L’INSTALLATORE E IL MANUTENTORE

INSTALLATION AND SERVICING MANUAL

AC 23 - AR 23 - AC 23 PLUS

CS 18 - RS 18

CS 24 - RS 24 - CS 24 PLUS

CS 28 - RS 28 - CS 28 PLUS

CS 32 - RS 32 - CS 32 PLUS

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9

Caratteristiche Tecnhiche

ITALIANO

2

CARATTERISTICHE TECNICHE

E DIMENSIONI

2.1 - CARATTERISTICHE TECNICHE

2.2 - VISTA CON L’INDICAZIONE DEI COMPONENTI PRINCIPALI E DIMENSIONI

!DEA AC 23

!DEA AC 23 Plus

Vista dall’alto

Vista da sotto

!DEA AC 23 - !DEA AR 23 - !DEA AC 23 Plus

NOTA!

Maggiori info nella sezione

‘‘Info Tecniche’’ alla pagina della



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30

ATTENZIONE!

Funzione riservata esclusivamente ai

Centri di Assistenza Autorizzati Unical

AG S.p.A.

Alcuni parametri di servizio possono

essere modifcati dal pannello comandi:

4.2 - PARAMETRI MODIFICABILI DA PANNELLO COMANDI

x 10’’

service

MAX

M

I

N

service

MAX

M

I

N

service

MAX

M

I

N

service

OK

1 ATTIVAZIONE

Premendo il pulsante (D) per 10 secondi, si

attiva la funzione quando la chiave compare sul

display in modo lampeggiante

POTENZA MASSIMA DI RISCALDAMENTO

VALORI

DA A STANDARD

0 (Min) 99 (Max) 99

TEMPERATURA DELLA SONDA ESTERNA

VALORI

DA A STANDARD

- 20°C) + 10°C) 20 (0°C)

LIMITATORE DEL NUMERO DI ACCENSIONI

VALORI

DA A A STANDARD

 1 (minuto) 15 (minuti) 0

(*) A ISTERESI VARIABILE

POST CIRCOLAZIONE DELLA POMPA

VALORI

DA A STANDARD

0 (5 min) 1 (SEMPRE) 0 (5 min)

SELEZIONE

Ruotare la manopola RISCALDAMENTO ‘’B’’

MODIFICA VALORE

Ruotare la manopola SANITARIO ‘’C’’

Il valore lampeggia sul display.

CONFERMA SELEZIONE

Confermare il parametro da modicare premendo

il tasto di sblocco

CONFERMA VALORE

Confermare il valore premendo il tasto di sblocco

SELEZIONE PARAMETRO

Tornare al punto 2.

DISATTIVAZIONE

Per uscire dall’elenco

parametri attendere 20”

o ruotare rapidamente la

manopola sanitaria ‘‘C’’.

2

4

3

5

6

7

MAX

MIN

MAX

MIN

service

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2

Provisions for proper disposal of the product in accordance with Directive 2002/96/EC

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 signicant energy and resource savings.

http://www.unicalag.it/prodotti/domestico-50/standard-gas/75/dea

3

Installation Instructions

Technical Features

General information

Maintenance instructions

ENGLISH

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.

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 ..................................................................................................13

2.4 Operation data .......................................................................................................................................14

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

4 MAINTENANCE INSTRUCTIONS ..................................................................................................................28

4.1 Inspection and maintenance instructions ..............................................................................................28

4.2 Parameters that can be edited from the control panel ..........................................................................30

4.3 Adaptation of the power to the heating system .....................................................................................31

4.4 Important notes .....................................................................................................................................32

4.5 Wiring diagram ......................................................................................................................................32

4.6 Error codes ............................................................................................................................................ 34

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

3.4 Positioning the boiler .............................................................................................................................17

3.6 Flue gas exhaust pipe connection ......................................................................................................... 18

3.7 Connections ..........................................................................................................................................21

3.8 Filling the system ...................................................................................................................................21

3.9 Electrical connections ............................................................................................................................22

3.10 Commissioning ................................................................................................................................... 23

3.11 Measurement of combustion efciency during installation ....................................................................24

3.11.1 Unblock button with calibration function .................................................................................... 24

3.11.2 Probes positioning ....................................................................................................................24

3.12 Burner adjustment .................................................................................................................................25

3.12.1 Electric minimum adjustment .................................................................................................... 27

3.12.2 Adaptation of the power to the heating system .........................................................................27

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 Safety warnings ....................................................................................................................................... 6

4

1

GENERAL INFORMATION

Any product repairs must be performed solely by

personnel authorised by Unical, 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 ef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.

Only original accessories must be used for all appli-

ances 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 (*).

1.1 - 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.

Your appliance must be installed and serviced in

compliance with the standards in force according

to the manufacturer instructions, up to standard

and by legally qualied and certied personnel.

Systems for the production of domestic hot wa-

ter 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, do-

mestic 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.

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-off devices.

Do not obstruct the terminals of the intake/exhaust

ducts.

In the event of failure and/or malfunctioning of the

appliance, switch it off and do not try to repair it or

intervene on it directly. Contact only personnel qual-

ied in compliance with law.

5

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 !DEA boiler has been built according to the current level of engineering and ac-

knowledged 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 must be considered improper.

UNICAL AG S.p.A. will not be held liable for any damage resulting from improper use.

Use according to the intended purposes also includes strict compliance with the in-

structions in this manual.

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, 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:

http://www.unicalag.it/prodotti/

domestico-50/standard-gas/75/dea

6

1.5 - SAFETY WARNINGS

ATTENTION!

The boiler cannot be used by children.

The boiler can be used by adults and only after having carefully read the user’s ma-

nual. Children should be supervised to ensure that they do not play or tamper with

the device.

ATTENTION!

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

personnel, in compliance with the standards and provisions in force. Incorrect instal-

lation 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 stipulat-

ing a maintenance contract.

Insufcient or irregular maintenance can jeopardise the operating safety of the appli-

ance 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 affect 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 off

- do not smoke

- do not use the telephone

- close the gas shut-off 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.

7

General information

ENGLISH

1.6 - TECHNICAL DATA PLATE

CE marking

The CE marking certies that the boilers meet:

- The essential requirements of the gas appliance

directive (directive 2009/142/EEC)

- The essential requirements of the electromagnetic

compatibility directive (2004/108/EEC)

- The essential requirements of the efciency di-

rective (92/42/EEC)

- The essential requirements of the efciency di-

rective (directive 2006/95/EEC)

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

A = Heatingcircuitcharacteristics

9 = (Pn) Effective nominal output

10 = (Pcond) Effective output in condensation

11= (Qmax)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

17= (Rfactor)No.oftapsaccordingtothedeclaredamountof

water(EN13203-1)

18= (Ffactor)No.ofstarsaccordingtothedeclaredqualityof

thewater(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

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

The technical data plate is located

inside the boiler on the back at the

bottom

8

1.7 - WATER TREATMENT

The treatment of the supply water

allows to prevent inconveniences

and maintain the functionality and

efciency of the generator over time.

The ideal water pH in heating systems

must be within:

To minimise corrosion, it is crucial to

use a corrosion inhibitor; in order for

it to work properly, the metal surfac-

es must be clean.

(see system protection ACCESSO-

RIES sect. in domestic price list)

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.

ATTENTION!

ANY DAMAGE TO THE BOILER

CAUSED BY THE FORMATION OF

FOULING OR BY CORROSIVE WA-

TER WILL NOT BE COVERED BY THE

WARRANTY.

1.8 - BOILER ANTIFREEZE

PROTECTION

To activate the antifreeze function, position

the two knobs as shown in the gure.

MAX

M

I

N

MAX

MIN

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

effectively from frost by using antifreeze

products with inhibitor for heating

systems.

Do not use car engine antifreeze

products as they could damage the

water gaskets.

VALUE MIN MAX

PH 6.5 8

Hardness [°fr] 9 15

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

P

O

S

ANTIFREEZE FUNCTION

Power supplies 11 - SR (*) Status

function

antifreeze

Actions

Electric Gas

1

ON ON < 6 °C ON - Burner and Pump ON until T > 14°C

2

ON OFF

< 2 °C ON

Only when both the power supplies are ON:

- Burner and Pump OFF until T > 5°C

- When T > 5°C then Burner and Pump

ON until T > 14°C.

OFF ON

OFF OFF

(*) Sensor 11 par. 2.2

9

Technical Features

ENGLISH

2

TECHNICAL FEATURES

AND DIMENSIONS

2.1 - TECHNICAL FEATURES

2.2 - VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS

!DEA AC 23

!DEA AC 23 Plus

View from above

View from below

!DEA AC 23 - !DEA AR 23 - !DEA AC 23 Plus

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

10

!DEA CS 18 - !DEA RS 18 - !DEA CS 24 - !DEA RS 24 - !DEA CS 24 Plus

View from above

View from below

!DEA CS 24 Plus

!DEA CS 18 - CS 24

11

Technical Features

ENGLISH

!DEA CS 28 / 32 Plus!DEA CS 28 - !DEA CS 32

!DEA CS 28 - !DEA RS 28 - !DEA CS 28 Plus - !DEA CS 32 - !DEA RS 32 - !DEA CS 32 Plus

View from above

View from below

12

2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR

INSTALLATION

KEY

No. C.E. S.E. Description

1 db SS Domestic hot water temper-

ature sensor

2 FLS Flow switch with cold water

lter

3 VG Gas valve

4 Fd E.

ACC/RIL

Ignition/detection electrode

5 Burner

6 Combustion chamber

7 AF TF Flue gas anti-overow ther-

mostat

8 Expansion vessel

9 FR

HT

Heat exchanger

10 HL TL Safety thermostat

11 Hb SR Heating temperature sensor

12 Ht P Pump

13 Lp DK Water deciency pressure

switch

14 Boiler drain valve

15 Filling valve

16 Diverter valve

17 Plate heat exchanger

18 FL

FH

VM Fan

19 AF

AS

PV Flue gas pressure switch

20 Safety valve

21 Automatic by-pass

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 re-

turn

G ¾

Rc Filling valve

Sc Boiler drain

Svs Safety valve drain

C.E. = ERROR CODES see

par. 4.6

S.E. = WIRING DIAGRAM

KEY see par. 4.5

Flow rate (l/h)

Avaible Head (m.c.a.) metres of water

13

Technical Features

ENGLISH

2.5 - GENERAL FEATURES !DEA

2.4 - OPERATING DATA ACCORDING TO UNI 10348 !DEA

For the adjustment data: NOZZLES - PRESSURE - DIAGRAMS - FLOW RATES - CONSUMPTION refer

to the paragraph ADAPTATION TO OTHER TYPES OF GAS.

Attention: should the boilers be used to heat systems at low temperature (e.g. radiant panels), a mixer valve is required to avoid

condensation forming.

!DEA AC23/AR23 CS18/RS18 CS24/RS24 CS28/RS28 CS32/RS32

Maximum thermal ow rate kW 25.5 20.5 26.5 30.1 34.5

Minimum thermal ow rate kW 11.5 9.0 11.5 11.5 13.5

Effective nominal output kW 22.9 18.5 24.6 28 31.6

Minimum effective output kW 9.9 7.8 10.1 10.2 11.6

Effective efciency at nominal load (100%) % 89.9 90.4 92.92 93.18 91.69

Effective efciency required (100%) % 89.72 89.54 92.78 92.9 90.0

Effective efciency at 30% load % 89.43 90.23 90.23 90.42 90.42

Effective efciency required (30%) % 87.08 86.80 90.17 90.34 87.5

Number of stars (according to 92/42 EEC)

no.

Combustion efciencywithnominalload(100%) % 91 91.57 93.72 94.46 93.59

Combustion efciency with reduced load % 88 83.41 88.92 88.78 87.16

Heat loss at casing (min.-max.) % 1.68-1.11 2.78-1.17 0.86-0.80 0.27-1.28 0.61-1.90

(*) Flue gas temperature tf-ta (max.) % 107.5 121.5 109 103.5 120.9

Flue gas mass ow rate (min.-max) g/s 16.76-8.85 14.32-13.0 14.21-13.89 14.7-14.6 17.2-16.6

Excess λ air % 122.09 80.61 46.94 35.3 33.84

CO

2

% 2.4-5 2.3-6.2 3.0-7.7 2.9-8.4 2.9-8.5

NOx(WeightedvalueaccordingtoEN297/A3orEN483) mg/kWh 189.2 178.59 178.59 186.6 178.21

NOx Class 2 2 2 2 2

Heat loss at chimneywithburneron(min.-max.) % 11.97-9.02 8.43-16.59 11.08-6.28 11.2-5.5 12.8-6.4

Heat loss at chimney with burner off % 0.657 0.457 0.354 0.32 0.280

Available head at the base of the chimney Min. / Max. Pa 2 / 50 2 / 50 2 / 50 2 / 50

2 / 50

Notes: (*) Room Temperature = 20°C Data detected with appliance running on Methane gas (G20)

!DEA

AC 23 AR23 CS 18 RS18 CS 24 RS24 CS 28 RS28 CS 32 RS32

Appliance category

II

2H3P

II

2H3P

II

2H3P

II

2H3P

II

2H3P

Minimum heat. circuit output (∆t 20 °C)

l/min

7.12 5.56 7.26 7.3 8.28

Minimum heating circuit pressure

bar

0.5 0.5 0.5 0.5 0.5

Maximum heating circuit pressure

bar

3 3 3 3 3

Primary circuit content

l

3 3 3 3.5 3.5

Maximum operating temperature in heat.

°C

78 78 78 78 78

Minimum operating temperature in heat.

°C

45 45 45 45 45

Expansion vessel total capacity

l

6 6 6 8 10

Expansion vessel pre-load

bar

1 1 1 1 1

Maximum system capacity (maxtemp.calc.)

l

138 138 138 184 230

Minimum domestic hot water circuit ow rate

l/min.

2.5 - 2.5 - 2.5 - 2.5 - 2.5 -

Minimum domestic hot water circuit pressure

bar

0.5 - 0.5 - 0.5 - 0.5 - 0.5 -

Maximum domestic hot water circuit pressure

bar

6 - 6 - 6 - 6 - 6 -

Domestic hot water specic ow rate (∆t 30 °C)

l/min.

10.5 - 8.5 - 11.5 - 13.5 - 15.2 -

Domestic hot water ow rate limiter

l/min.

10 - 8 - 10 - 12 - 14 -

Production of D.H.W. in continuous operation with ∆t 45 K

l/min.

7.8 - 8 - 7.6 - 8.9 - 9.9 -

Production of D.H.W. in continuous operation with ∆t 40 K

l/min.

8.8 - 6.3 - 8.6 - 10.1 - 11.1 -

Production of D.H.W. in continuous operation with ∆t 35 K

l/min.

10 - 7.2 - 9.8 - 11.5 - 12.7 -

Production of D.H.W. in continuous operation with ∆t 30 K

l/min.

11.7 - 8.4 - 11.4 - 13.4 - 14.9 -

Production of D.H.W. in continuous operation with ∆t 25 K (*)

l/min.

14.1 - 10.1 - 13.7 - 16.1 - 17.8 -

Temperature adjustable in domestic hot water mode

°C

35-57

-

35-57

-

35-57

-

35-57

- 35-57 -

Voltage/Frequency electric power supply

V-Hz

230/50 230/50 230/50 230/50 230/50

Fuse on the power supply

A (F)

2 2 2 2 2

Maximum absorbed output

W

85 138 138 138 150

Protection rating

IP

X4D X5D X5D X5D X5D

Net weight

kg

27.1 24.6 29.6 28.1 29.6 28.1 34.7 33.2 35.7 34.7

Gross weight

kg

30 27.6 32.5 31 32.5 31 38 36.2 39 37.2

(*) mixed

14

2.6 - GENERAL FEATURES !DEA Plus

OPERATING DATA ACCORDING TO UNI 10348 !DEA Plus

Attention: should the boilers be used to heat systems at low temperature (e.g. radiant panels), a mixer valve is required to avoid

condensation forming.

!DEA AC 23 Plus CS 24 Plus CS 28 Plus CS 32 Plus

Maximum thermal ow rate kW 25.5 26.5 30.1 34.5

Minimum thermal ow rate kW 11.5 11.5 11.5 13.5

Effective nominal output kW 22.9 24.7 28.1 32.3

Minimum effective output kW 9.9 10.1 10.2 12.2

Effective efciency at nominal load (100%) % 89.8 93.05 93.21 93.5

Effective efciency required (100%) % 89.72 92.78 92.90 93.02

Effective efciency at 30% load % 89.43 90.43 90.42 90.42

Effective efciency required (30%) % 87.08 90.18 90.34 90.53

Number of stars (according to 92/42 EEC) no.

Combustion efciencywithnominalload(100%) % 91.36 93.21 94.6 94.57

Combustion efciency with reduced load % 88.5 88.06 89.52 88.76

Heat loss at casing (min.-max.) % 2.0- 1.6 0.17 - 0.16 0.77-1.40 1.07-1.35

(*) Flue gas temperature tf-ta (max.) % 95.5 119.3 96.3 101.4

Flue gas mass ow rate (min.-max) g/s 19.1-21.2 14.21-13.74 15.17-15.35 18.12-16.8

Excess λ air % 140.7 45.15 42.56 35.34

CO

2

% 2.2-4.6 3.0-7.8 2.8-8.0 2.75-8.4

NOx(WeightedvalueaccordingtoEN297/A3orEN483) mg/kWh 189.2 184.16 186.00 164.05

NOx Class 2 2 2 2

Heat loss at chimneywithburneron(min.-max.) % 8.6-11.5 11.94-6.79 5.40-10.48 5.40-11.2

Heat loss at chimney with burner off % 0.657 0.256 0.321 0.280

Available head at the base of the chimney Min. / Max. Pa 2 / 50 2 / 50 2 / 50 2 / 50

(*) Room Temperature = 20°C

!DEA AC 23 Plus CS 24 Plus CS 28 Plus CS 32 Plus

Appliance category II

2H3P

II

2H3P

II

2H3P

II

2H3P

Minimum heat. circuit output (∆t 20 °C) l/min 7.1 7.2 7.3 8.7

Minimum heating circuit pressure bar 0.5 0.5 0.5 0.5

Maximum heating circuit pressure bar 3 3 3 3

Primary circuit content l 3 3 3.5 3.5

Maximum operating temperature in heat. °C 78 78 78 78

Minimum operating temperature in heat. °C 45 45 45 45

Expansion vessel total capacity l 6 6 8 10

Expansion vessel pre-load bar 1 1 1 1

Maximum system capacity (maxtemp.calc.of82°C) l 138 138 184 230

Minimum domestic hot water circuit ow rate l/min. 2.5 2.5 2.5 2.5

Minimum domestic hot water circuit pressure bar 0.5 0.5 0.5 0.5

Maximum domestic hot water circuit pressure bar 6 6 6 6

Domestic hot water specic ow rate (∆t 30 °C) l/min. 11 12 13.5 15.5

Domestic hot water ow rate limiter l/min. 10 10 12 14

Production of D.H.W. in continuous operation with ∆t 45 K

l/min. 7.8 7.4 8.7 10.3

Production of D.H.W. in continuous operation with ∆t 40 K

l/min. 8.8 8.3 9.8 11.6

Production of D.H.W. in continuous operation with ∆t 35 K

l/min. 10.0 9.5 11.1 13.2

Production of D.H.W. in continuous operation with ∆t 30 K

l/min. 11.7 11.0 13.0 15.4

Production of D.H.W. in continuous operation with ∆t 25 K (*)

l/min. 14.1 13.2 15.6 18.5

Temperature adjustable in domestic hot water mode

°C 35-57 35-57 35-57 35-57

Voltage/Frequency electric power supply V-Hz 230/50 230/50 230/50 230/50

Fuse on the power supply A (F) 2 2 2 2

Maximum absorbed output W 85 138 138 150

Protection rating IP X4D X5D X5D X5D

Net weight kg 28.6 30.1 35.2 36.2

Gross weight kg 31.5 33 38.2 39.2

(*) mixed

15

Installation Instructions

ENGLISH

3

INSTALLATION INSTRUCTIONS

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 temper-

ature lower than the atmospheric

pressure boiling temperature.

Before connecting the boiler, have pro-

fessionally qualied personnel:

a) Thoroughly wash all the piping of

the system to remove any residues

or impurities which could jeopard-

ise proper operation of the boiler,

even from a hygienic point of view.

b) Check that boiler is set up to operate

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 bot-

tlenecks, and that no exhausts from

other appliances are inserted, unless

the ue has been

implemented to accommodate sev-

eral utilities according to specific

standards and regulations in force.

Only after this check can the tting

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 cen-

tral heating system and/or domestic hot

water supply network compatible with its

efciency and output.

3.1 - GENERAL WARNINGS

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 of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

NOTE!

Further details in the section

‘‘Technical Information’’ on the boiler

page of the www.unicalag.it website

16

The !DEA 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.

H

P

L

A

B

D

C

As well as the appliance, the packaging contains:

A DOCUMENTATION ENVELOPE

- System booklet

- User operating instructions booklet

- Instruction booklet for the installer and

maintenance engineer

- Warranty

- 2 Spare parts form

- Certicate of conformity

B - Connection predisposition paper template

C - 2 rawlplugs for boiler attachment

D - Flue gas exhaust collector (RS - CS version only)

!DEA P

depth

L

width

H

height

18÷24 kW 290 mm

470 mm 810 mm

28÷32 kW 380 mm

21

3.4 - PACKAGING

17

Installation Instructions

ENGLISH

When choosing the place of the installation of the

boiler, follow the safety instructions below:

- Place the boiler 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.

!DEA CS/RS 18 - CS/RS 24 - CS/RS 28 - CS/RS 32

!DEA CS 24/28/32 Plus

Since the temperature of the wall on which the boil-

er is installed and the temperature of the coaxial

(200)

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 insula-

tion between the wall and the ue gas exhaust pipe.

!DEA AC/AR 23

!DEA AC 23 Plus

Maintain a distance at the sides of at least 200 mm

from walls with ammable fabrics (e.g. curtains).

3.5 - POSITIONING THE BOILER

Clearance

18

FOR BOILERS WITH FORCED DRAUGHT

3.6 - FLUE GAS EXHAUST PIPE CONNECTION

C11BS

% slope towards outle = 3%

FOR BOILERS WITH NATURAL DRAUGHT

Ventilation of the rooms

The boiler must be installed in an adequate room in

compliance with the standards in force.

The combustion air is withdrawn directly from

the room where the boiler is installed.

Said room must be ventilated in compliance with the

standards.

To connect the ue gas exhaust pipe, local and na-

tional standards must be observed

In the event the boiler is replaced, ALWAYS re-

place the ue gas pipe as well.

The boiler is type approved for the exhaust congu-

rations listed below:

C12x C12

% Slope towards outlet = 3%

TOTAL LENGTH (LA intake + L Exhaust)

COAXIAL Ø60/100 DOUBLE Ø80

COLLECTOR COLLECTOR

WITH WITHOUT WITH WITHOUT

FROM

[m]

A

[m]

UP TO

[m]

FROM

[m]

A

[m]

UP TO

[m]

0,5 1 4 1 + 1 4 + 4

25

(13A+12S)

COAXIAL Ø80/125 DOUBLE Ø60

COLLECTOR COLLECTOR

WITH WITHOUT WITH WITHOUT

FROM

[m]

A

[m]

UP TO

[m]

FROM

[m]

A

[m]

UP TO

[m]

NA NA NA NA NA NA

Distance between air

inlet pipe and flue gas

exhaust pipe: min 250

mm - max 500

Horizontal exhaust and intake terminals directed

outside via coaxial or double pipes.

C32x C32

TOTAL LENGTH (LA intake + L Exhaust)

COAXIAL Ø60/100 DOUBLE Ø80

COLLECTOR COLLECTOR

WITH WITHOUT WITH WITHOUT

FROM

[m]

A

[m]

UP TO

[m]

FROM

[m]

A

[m]

UP TO

[m]

1 2,5 5 1 + 1 4 + 4

25

(13A+12S)

COAXIAL Ø80/125 DOUBLE Ø60

COLLECTOR COLLECTOR

WITH WITHOUT WITH WITHOUT

FROM

[m]

A

[m]

UP TO

[m]

FROM

[m]

A

[m]

UP TO

[m]

1 2,5 7 NA NA NA

Vertical exhaust and intake terminals directed out-

side via coaxial or double pipes..

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Unical !DEA Installation guide

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