IVEN 04 - Unical AG · IVEN 04 CTFS 28 F forced draught room sea-led boiler with electronic...

36
00331967 - 1 a edition - 02/2004 IVEN 04 RTN 24 - RTFS 24 - RTFS 28 CTN 24 F - CTFS 24 F - CTFS 28 F INSTALLATION USE AND MAINTENANCE

Transcript of IVEN 04 - Unical AG · IVEN 04 CTFS 28 F forced draught room sea-led boiler with electronic...

00331967 - 1a edition - 02/2004

IVEN 04

RTN 24 - RTFS 24 - RTFS 28CTN 24 F - CTFS 24 F - CTFS 28 F

INSTALLATION USEAND MAINTENANCE

2

General infoIMPORTANT

This INSTRUCTION MANUAL, which is an integral and indispensable part of the product, must be handed over to the user by the plumbers andmust be kept in a safe place for future reference. The manual must be handed over with the boiler should it be sold or transferred.

This boiler must be used for the purposes for which it has been designed. Any other use shall be considered incorrect and thereforedangerous.

The boiler must be installed in compliance with applicable laws and standards and according to the manufacturer’s instructions given in thismanual. Incorrect installation may cause injury to persons and/or animals and damage to property. The manufacturer shall not be held liable for anysuch injury and/or damage.

Damage and/or injury caused by incorrect installation or use and/or damage and/or injury due to non-observance of the manufacturer’s instructionsshall relieve UNICAL from any and all contractual and extracontractual liability.

Before installing the boiler, check that the technical data corresponds to requirements for its correct use in the system.

Check that the boiler is intact and that it has not been damaged during transport and handling. Do not install equipment which is patently damagedand/or faulty.

Do not obstruct the air suction and/or heat dissipation grates.

Only original accessories must be used for all boilers supplied with optionals or kits (including electrical ones).

Dispose of the packaging with care as all the materials can be recycled. The packaging must therefore be sent to specific waste managementsites.

Keep the packaging out of the reach of children as it may represent a choking and suffocation hazard.

In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualified technicians.

Original parts must be used for all repairs to the boiler.

Non-observance of the above requirement may jeopardize the safety of the boilers and expose people, animals and property to danger.

To guarantee efficiency and correct functioning of the equipment it is legally binding to service the boilers once a year according to theschedule indicated in the relative section of this manual.

In the event of long periods of inactivity of the boiler, disconnect it from the power mains and close the gas tap (Warning! In this case the boiler’selectronic anti-freeze function will not be operative).

Should there be a risk of freezing, add anti-freeze: it is not advisable to empty the system as this may result in damage; use specific anti-freezeproducts suitable for multi-metal heating systems.

N.B.For boilers which use gaseous fuel, if you smell gas:- do not turn on or off electrical switches and do not turn on electrical appliances;- do not ignite flames and do not smoke;- close the main gas tap;- open doors and windows;- contact a Service Centre, qualified installer or the gas supply company.

Never use flames to detect gas leaks.

WARNING

This boiler has been built for installation in the country indicated on the technical data plate: installation in any other country may be a sourceof danger for people, animals and property.

Read the warranty conditions and clauses on the warranty certificate attached to the boiler with care.

‘’WATER TREATMENT IN C.H. SYSTEM FOR CIVIL USE’’

NOTE FOR INSTALLER AND USER

1) The frequency of the cleaning of the D.H.W. heat exchanger is related to the hardness of the feeding water.

2) With a water hardness higher than 28°f (16°d) the use of antiscaling devices, whose choice will be made on the base of water characteristics, issuggested.

3) To increase the resistance to the scaling, a D.H.W. temperature adjustment very close to that one of the actual use, is suggested.

4) The adoption of a modulating room thermostat reduces the scaling danger.

5) We advise you to verify the state of cleaness of the D.H.W. heat exchanger at the end of the first year and subsequently every two years.

3

General infoDATA PLATE

2H

2E

3+

3B/P

3P

G20

G20

G30/G31

G30 - 31

G31

20 - 25

20

28-30/37

30 - 50

37 - 50

mbar

mbar

mbar

mbar

mbar

IT ES IEPT GRTR HRCZ SKHUSIGBCN RU ROLV EE LT

II 2H3+II 2H3+II 2H3B/PII 2H3PII 2HS 3B/PII 2E3PII 2H3P I 2H I 2H

20 ; 28-30/37 mbar20 ; 28-30/37 mbar20 ; 50 mbar18 ; 50 mbar25 ; 30 mbar20 ; 50 mbar20 ; 37 mbar20 mbar20 mbar

/

1

2

3 4 5

6 7 8

9

12

15

17

19

20

18

16

10

13

11

14

21

1 = P.I.N. code2 = Boiler type (only for condensing boiler)3 = (S.N°) Serial Nr.4 = Manufacture Date5 = Model6 = Appliance type7 = Elettrical supply8 = Maximum absorbed power - Insulation

protection9 = (Pn) Nominal Output

10 = (Pcond) Condensing Nominal Output(only for condensing boiler)

11 = (D) Specific flow rate EN 62512 = (Qn) Nominal heat input13 = (Qnw) Nominal heat input for D.H.W.

system if there are different out putsbetween the C.H. and D.H.W. circuits

14 = (NOx) NOx Class15 = (PMS) Max pressure C.H. system16 = (T max) Max Temperature C.H. system

17 = (PMW) Max pressure D.H.W. system18 = (T max) Temperature D.H.W. system19 = Adjusted for gas type X20 = Country of destination, Gas category,

Supply pressure21 = EN standards applicable to the boiler

type

GAS VALVE LABEL

0033

1980

TranslationWhile connecting gas inlet pipe of the boiler to the

pipe coming from gas network, it is MANDATORY toinsert a TIGHT GASKET, whose dimensions and material

must be adequate. Connection is NOT suitable forhemp, teflon strip or similar materials

4

General info

1

2

3

For your own safety, observe these safety instructions.:

PLEASE NOTE:User tip for the optimum utilisationand setting of the control(s) plususeful information.

WARNINGfrom risk of electric shock.

WARNINGIdentifies potentially dangeroussituations.

TECHNICAL FEATURESAND DIMENSIONS .......................................................... pag. 51.1 Technical features ................................................................... pag. 51.2 Dimensions .............................................................................. pag. 51.3 Hydraulic circuits ..................................................................... pag. 61.4 Technical data ......................................................................... pag. 81.5 Main characteristics ................................................................ pag. 8

DIRECTIONS FORINSTALLERS ......................................................................... pag. 92.1 Installations rules .................................................................... pag. 92.2 Installation ............................................................................... pag. 9

2.2.1 Packing ....................................................................... pag. 92.2.2 Positioning the boiler .................................................. pag. 102.2.3 Assembling the boiler ................................................. pag. 112.2.4 Ventilation ................................................................... pag. 112.2.5 Flue gas discharge system ........................................ pag. 112.2.6 Discharge and suction pipe configuration .................. pag. 132.2.7 Positioning of terminals for type C boilers .................. pag. 142.2.8 Smoke evacuation Ø80 air suction flange .................. pag. 152.2.9 Discharge of flue gas into coaxial ducts with a

diameter of 100/60 mm (Type A accessories) ........... pag. 162.2.10 Flue gas discharge and air suction with separate

pipes with 80 mm diameter ........................................ pag. 172.2.11 Measurements of combustion efficiency ................... pag. 162.2.12 Connection to the gas mains ...................................... pag. 202.2.13 Hydraulic connection .................................................. pag. 202.2.14 Arrangement for a D.H.W. tank ................................... pag. 222.2.15 Electrical connection .................................................. pag. 23

2.3 Wiring diagram ......................................................................... pag. 242.3.1 Pratical connection diagram ....................................... pag. 242.3.2 Jumper location .......................................................... pag. 25

2.4 Filling the system .................................................................... pag. 252.5 Starting the boiler .................................................................... pag. 252.6 Adjusting the burner ................................................................ pag. 262.7 Modification of other gases ..................................................... pag. 272.8 Adjustement of the output to ch system's needs ................... pag. 292.9 Finding chart and corrective actions ...................................... pag. 292.10 Failure code ............................................................................. pag. 31

USERS' INSTRUCTION ............................................... pag. 323.1 Control panel ........................................................................... pag. 323.2 Switching on/off ....................................................................... pag. 333.3 Antifrost protection .................................................................. pag. 343.4 Important suggestion and notes ............................................. pag. 34

5

Installation info

1 CARATTERISTICHE TECNICHE E DIMENSIONI

fig. 1

1.2 - DIMENSION

A

420 345

800

1.1 - TECHNICAL FEATURES

IVEN 04 is a wall hung gas boiler with built-inatmospheric gas burner; it is available in thefollowing versions:

24 with 24 kW output;28 with 28 kW output;

C with instantaneous D.H.W. production;R- for heating only;

TN with natural draught open chamber;TFS with forced draught room sealed com

bustion chamber;All versions have electronic ignition.Models in the IVEN 04 series are the following:

IVEN 04 CTN 24 F open boiler, with electronicignition and instantaneous D.H.W. production;

IVEN 04 RTN 24 F open boiler, with electronicignition, for heating only;

IVEN 04 CTFS 24 F forced draught room sea-led boiler, with electronic ignition and instan-taneous D.H.W. production;

IVEN 04 RTFS 24 F forced draught room sea-led boiler, with electronic ignition for heatingonly;

IVEN 04 CTFS 28 F forced draught room sea-led boiler with electronic ignition and instanta-neous D.H.W production;

IVEN 04 RTFS 28 F forced draught room sea-led boiler with electronic ignition for heatingonly;

IVEN 04 is supplied with all control and sa-fety features according to the latest laws inforce.The main technical features of the IVEN 04boilers are summarised below.• Bithermal, copper, high performance heat

exchanger;• Electronic ignition;• Electronic flame modulation;• Minimum output control;• Electronic control of ignition ramp;• Anti-freeze function;• Pump anti-jamming function;• Pump over run function;• High limit thermostat (95°C);• Three-speed circulating pump;• Expansion vessel;• Automatic air vent;• C.H. system water filling valve except Fren-

ch, Belgium and England version) ;• Safety pressure switch for low water level;• Priority flow switch for D.H.W.;• Tap water flow rate restrictor set at 10 li-

tres/min, for 24 kW boilers (brown) and 12l/min, for 28 kW boilers (pink)

Note: This 10 (12) l/min flow rateis guaranteed with a upstreampressure of 2 bar. If the upstreampressure is much higher than 2

bar, then it is possible to reduce the flowrate to 10 (12) l/min by rotating clock-wisethe screw ‘’A’’. On the contrary, if the up-stream pressure is lower than 2 bar it ispossible to reach the flow rate of 10 (12) l/min by rotating counter clock-wise thescrew ‘’A’’. If, also in this case the flowrate of 10 (12) l/min is not reacheable thenthe flow restrictor can be removed from itsseat.

• Control panel with IP 44 insulation protec-tion

• Temperature and pressure gauge;• Warning light for: presence of power, re-

quest for heating, burner in operation, lockout;

• ON-OFF switch;• D.H.W. temperature selector (35/57°C) for

IVEN 04 CTN 24 F-CTFS 24 F-CTFS 28 F+ antifrost position;(25/57°C) for IVEN 04 RTN 24 - RTFS 24 -set off only if arranged with storarage tank

• C.H. temperature selector (45/78°C) + sum-mer/winter position.

• Reset button;• Chimney sweeper button• Mounting jig• Mounting frame with valves (opt.)• Flue gas antispillage thermostat 75°C

(IVEN 04 TN)

6

Installation info1.3 - HYDRAULIC CIRCUIT

fig. 3

IVEN 04 CTN 24 F

IVEN 04 CTFS 24 F - IVEN 04 CTFS 28 F

fig. 2

12 13

5

6

89

1014

15

17

4

7

19

18

20

3

1

2

21

9

11

16

RFGM C

RFGM C

3

194

76

8

9

13

1415

18

1617

5

20

2223

12

11

21

24

8

1

2

10

1 Heating circuit safety valve2 Minimum water pressure switch3 Filling valve (except French, Belgium

and England version)4 D.H.W. temperature sensor5 Gas valve6 Expansion vessel7 Burner nozzles8 Expansion vessel filling valve9 Ignition electrode10 Bithermal heat exchanger11 H.L. thermostat12 Flue gas manifold/down-draught

dverter13 Flue gas anti-spillage thermostat14 Ionisation electrode15 C.H. temperature sensor16 Automatic air vent17 Circulating pump18 D.H.W. flow restrictor 10-12 l/min19 Flow switch20 Cold water filter21 By-pass

M C.H. system flowC D.H.W. outletG Gas inletF D.C.W. inletR C.H. system return

1 Heating circuit safety valve2 Minimum water pressure switch3 D.H.W. temperature sensor4 Expansion vessel5 Gas valve6 Burner nozzles7 Expansion vessel filling valve8 Ignition electrode9 Bithermal heat exchanger10 H.L. thermostat11 Room sealed combustion chamber12 Flue gas extractor fan13 Air/flue coaxial duct14 Micro-switch on flue gas pressure

switch15 Flue gas pressure switch16 Ionisation electrode17 Heating temperature sensor18 Automatic air vent19 Circulating pump20 Filling valve (except French, Belgium

and England version)21 D.H.W. flow restrictor 10-12 l/min22 D.H.W. Flow switch23 Cold water filter24 By-pass

M C.H. system flowC D.H.W. outletG Gas inletF D.C.W. inletR C.H. system return

7

General info

RGM

RGM

fig. 5

IVEN 04 RTFS 24 - IVEN 04 RTFS 28

fig. 4

183

65

7

8

11

1213

1415

16

4

19

10

9

9 10

4

3

6

78 11

12

13

14

15

16

5

17

20

11

15

1

2

12

17

IVEN 04 RTN 241 Heating circuit safety valve2 Minimum water pressure switch3 Expansion vessel4 Gas valve5 Burner nozzles6 Expansion vessel filling valve7 Ionisation electrode8 Heat exchanger9 Flue gas manifold/down-draught

diverter10 Flue gas anti-spillage thermostat11 Ignition electrode12 H.L. thermostat13 C.H. temperature sensor14 Automatic air vent15 Circulating pump16 Filling valve (except French,

Belgium and England version)17 By-pass

M C.H. system flowG Gas inletR C.H. system return

1 Heating circuit safety valve2 Low water level pressure switch3 Expansion vessel4 Gas valve5 Burner nozzles6 Expansion vessel filling valve7 Ionisation electrode8 Heat exchanger9 Room sealed combustion chamber10 Flue gas extractor fan11 Air/flue coaxial duct12 Micro-switch on flue gas pressure

switch13 Flue gas pressure switch14 H.L. thermostat15 Ignition electrode16 Heating temperature sensor17 Automatic air vent18 Circulating pump19 Filling valve (except French,

Belgium and England version)20 By-pass

M C.H. system flowG Gas inletR C.H. system return

8

General info

Warning:If the boilers are used in low tem-perature heating system (ex. floor hea-ting)it is necessary to use a mixing valve toavoid condensation phenomena.

l/minbarbarl°C°Clbarllbarbarl/min.l/min.l/min.l/min.l/min.l/min.l/min.°CV-HzA (F)WIPkg

kWkW%%%%n.%%%°Cg/s%%mg/kWh

%%

RTN 24

23,88

10,07

90,11

89,76

88,53

87,3

2

92,6

90,2

2,6 - 2,5

91,8

18-20

113,8

2,4-5,3

197

2

9,8 - 7,4

0,486

RTFS 24

23,94

9,95

90,34

89,76

88,60

87,14

2

93,3

87,9

1,88-2,96

112,5

13,64-14,38

67,7

3,0-7,4

157

2

12,1-6,7

0,295

CTN 24 F

23,88

10,07

90,11

89,76

88,53

87,3

2

92,6

90,2

2,6 - 2,5

91,8

18-20

113,8

2,4-5,3

197

2

9,8 - 7,4

0,486

CTFS 24 F

23,94

9,95

90,34

89,76

88,60

87,14

2

93,3

87,9

1,88-2,96

112,5

13,64-14,38

67,7

3,0-7,4

157

2

12,1-6,7

0,295

RTFS 28

27,45

9,80

90,01

89,88

87,43

87,32

2

93,2

86,8

1,76-3,19

87,7

17,5-17,6

60,86

2,65-7,9

163

2

13,2-6,8

0,256

RTN 24 II2H3+

7,2

0,5

3

3,5

81

45

8

1

183,9

-

-

-

-

-

-

-

-

-

-

230/50

4

70

X4D

37

CTN 24 F II2H3+

7,2

0,5

3

3,5

81

45

8

1

183,9

2,5

0,5

6

11,5

10

7,6

8,6

9,78

11,4

13,69

35 - 57

230/50

4

70

X4D

37

CTFS 24 F II2H3+

7,37

0,5

3

3,5

81

45

8

1

183,9

2,5

0,5

6

11,5

10

7,6

8,58

9,80

11,44

13,73

35 - 57

230/50

4

130

X4D

37

RTFS 24 II2H3+

7,37

0,5

3

3,5

81

45

8

1

183,9

-

-

-

-

-

-

-

-

-

-

-

230/50

4

130

X4D

37

RTFS 28 II2H3+

7,02

0,5

3

3,5

81

45

8

1

183,9

-

-

-

-

-

-

-

-

-

-

-

230/50

4

130

X4D

37

IVEN 04

CTFS 28 F II2H3+

7,02

0,5

3

3,5

81

45

8

1

183,9

2,5

0,5

6

12,5

12

8,74

9,84

11,24

13,11

15,74

35 - 57

230/50

4

130

X4D

37

CTFS 28 F

27,45

9,80

90,01

89,88

87,43

87,32

2

93,2

86,8

1,76-3,19

87,7

17,5-17,6

60,86

2,65-7,9

163

2

13,2-6,8

0,256

1.4 - OPERATING DATA

Nominal outputMinimum outputActual water efficiency at full load (100%)Min. required water efficiency at full load (100%)Actual water efficiency at part load (30%)Min. required water efficiency at part load (30%)Stars No. off (According EEC Directive 92/42)Combustion efficiency at nominal load (100%)Combustion efficiency at part load (30%)Stand-by losses (min.-max.)(*)Flue gas temperature (min. - max.)Flue gas mass flow rate (min. - max)Excess of air lCO2

NOX (value according EN 297/A3 + EN 483)NOX classFlue losses with burner in operation (min.-max)Flue losses with burner off

For the following data: Nozzle - Burner pressure - Diaphragm (where applicable) - Inputs - Gas consumptions refer to pagraph SUITABILITY TO USEOTHER GASES.

Appliance categoryMin. water flow rate in CH circuit (Dt 20 K)Min. pressure in CH circuitMax. pressure in CH circuitWater content primary circuitMax. oper. temperature in CH modeMin. oper. temperature in CH modeTotal capacity of expansion vesselC.H. expansion vessel pre-loadingMax. water content CH circuit (calc. x max. T°of 82°C)Min. water flow rate in D.H.W. circuitMin. DHW. pressureMax. DHW. pressureDHW specific flow rate (Dt 30 K)Flow restrictorDHW production in continuous operation with Dt 45 KDHW production in continuous operation with Dt 40 KDHW production in continuous operation with Dt 35 KDHW production in continuous operation with Dt 30 K*DHW production in continuous operation with Dt 25 K*DHW Temperature rangeElectrical supplySupply fuseMaximun absorbed powerInsulation protectionNet weight

1.5 - GENERAL FEATURES

(*) mixed

9

Installation info

fig. 6

2.2.1 - PACKING

IVEN 04 24 F is delivered completely assem-bled and packed in a strong cardboard box.Once the boiler has been unpacked check thatit is intact.

2 DIRECTIONS FORINSTALLER

2.1 - DIRECTIONS FORINSTALLER

IVEN 04 is a gas boiler which must beinstalled in accordance with the latest re-gulations or rules in force. For the boilercategory, which changes according to thedestination country, see page 4.

NOTE:Observe the corresponding technical rulesand the building supervisory and statutoryregulations of the country of final use wheninstalling and operating the system.

Always ensure that an appropriatelyspecialised company is entrusted withinstallation, gas supply and flue gasconnection, commissioning and powersupply connection, as well as all servicingand repair work.Work on gas conduits and fittings mustonly be carried out by a registered serviceprovider.The system must be cleaned and servicedonce a year. This includes an inspection

900

495

390

Keep the packaging material(cardboard box, plastic strips,plastic bag, etc.) out of the rea-ch of children as it representsa choking and suffocation ha-zard.

In addition to the boiler packaging contains:- a bag with:- installation, use and maintenance

handbook,- warranty card- template for fixing the boiler to the wall,- 2 dowels with screws hook to fix the boiler

to the wall,- Only for models TFS, a diaphragm for flue

gas outlet

UNICAL refuses all liability forinjury to persons and animalsor damage to property resul-ting from non-observance ofthe above.

of the entire system to see if it is in fullworking order.Defects and faults must be eliminatedimmediately.Please note that we can accept no liabilitywhatsoever for loss or injury resulting fromunauthorised adjustment or manipulationof the system’s control or regulatingdevices.

2.2 - INSTALLATION

10

Installation info

fig. 7

2.2.2 - POSITIONING THE BOILER

Every boiler is supplied with special “MOUN-TING JIG” with which the pipes for connec-tion to the system, D.H.W. and gas can bepositioned when the hydraulic system is beinglaid out and before the boiler is installed.This MOUNTING JIG, comprising a sheet ofstrong paper which must be fixed to the wallchosen for the installation of the boiler, givesall the indications needed to make the holesin the wall using two screws with expandingdowels.Use the lower part of the MOUNTING JIG tomark the exact point of the connection of thegas supply, cold water supply pipe, D.H.W.outlet, C.H. flow and return.

When choosing the position of the boiler:- refer to the indications given in the section

“Flue gas evacuation system “.- leave a clearance of 50 mm on each side

of the boiler to facilitate maintenance ope-rations.

- check that the wall is suitable.- avoid fixing the boiler to thin partitions.- avoid installing the boiler above applian-

ces which might affect operation when inuse (cookers which produce greasy ste-am, washing machines, etc.)

- avoid installing natural draught boilers incorrosive or very dusty atmospheres suchas hairdressers’, laundrettes, etc. as thelife of the boiler components could be si-gnificantly shortened.

LM = C.H. system

flowC = D.H.W.

outletG = GasF = Cold water

inletR = C.H. system

returnS = Safety valve

discharge

Ø L mm

= 3/4'' 144

= 1/2'' 144= 3/4'' 153,5

= 1/2'' 144

= 3/4'' 144

= 195,5

For IVEN 04 TFSSince the temperature of the wallon which the boiler is installedand the temperature on the sur-face of the coaxial duct do not

IVEN 04 TNMaintain distance of at least 200mm on the sides with wall whichhave inflammable materials. CONNECTION POSITION SEEN FROM ABOVE

MOUNTING JIGS FOR BOILER CONNECTIONS

increase, in normal operating conditions, morethan 60 K, it is not necessary to keep a mini-mum distance from inflammable walls.

For boilers with dual suction and exhaust ducts,place insulating material between the wall andthe pipe in the case of inflammable walls andwall crossings.

195.

5

153.

5

144

M C G F R

Filling ofC.H. systemSafety

valve discharge

�������� ��������

11

Installation info2.2.3 - ASSEMBLING THE BOILER

Before connecting the boiler to the D.H.W. andheating system pipes, carefully clean the pi-pes to remove all traces of metal resulting fromprocessing and welding operations as well asany oil and grease which could damage theboiler or jeopardize its operation. To install the boiler:

- Fix with tape the paper template to the wall- make two Ø 12 holes in the wall and insert

the hooks;- position the junction points for the connec-

tion of the gas supply pipe, cold water sup-ply pipe, D.H.W. outlet, CH flow and returnin the positions shown by the template. ;

- fit the boiler onto the support hooks;

Do not use solvents whichcould damage the componen-ts.

Unical refuses all liability forinjury to persons and animals ordamage to property resultingfrom non-observance of the abo-ve.

- connect the boiler to the gas pipe, dome-stic cold and hot water pipes, CH flow andreturn pipes.

- connect to electrical supply

2.2.4 - VENTILATION

The boiler must be installed in a suitable roomaccording to the rules in force and particular-ly:

NATURAL DRAUGHT OPEN FLUE BOILERS(TYPE B11bs INSTALLATION and VMC)The boliers IVEN 04 CTN 24 F, IVEN 04 RTN24, are open flue boilers and are foreseen forchimney connection: the air for combustion istaken directly from the room in which it is in-stalled.The room can have both a direct ventilation(i.e. with ventilation openings facing outwar-ds) or an indirect ventilation (i.e. with ventila-tion openings facing an adjacent room) provi-ded that the following requirements are com-plied with:Direct ventilation:- The room has to have a ventilation ope-

ning of, at least,6 cm² /kW of installed input (see input ta-ble on par. 2.7) and, in no case, lower than100 cm² and made directly onto an exter-nal wall.

- The opening has to be as close as possi-ble to the floor.

- It should not be possible to close it and itshould be protected with a grate not redu-cing its usefull ventilation section.

- A correct ventilation can be optained alsothrough the addition of more openings, pro-vided the addition of the different sectionsis not less than that really needed.

must have a vertical section with a lengthmore than twice the diameter, before get-ting into the chimney.

2.2.5 - FLUE GAS DISCHARGESYSTEM

NATURAL DRAUGHT OPEN FLUE BOILERS

Connection to the chimney

A good chimney is very important for the cor-rect functioning of the boiler; it must thereforeconform with the following requirements:- it must be made from waterproof material

and be resistant at the temperature of theflue gas and relative condensate;

- it must have sufficient mechanical stren-

gth and low thermal conductivity;- it must be perfectly sealed to prevent co-

oling due to parasite air inlets;- it must be as vertical as possible and the

end section must have a chimney capwhich guarantees efficient and constantevacuation of the combustion products;

- the chimney must have a diameter notsmaller than that of the boiler’s draught di-verter; for chimneys with a square orrectangular section, the internal sectionmust be 10% larger than the section of theconnection duct to the draught diverter.

- starting from the draught diverter, the duct

- In case it is not possible to make a venti-lation opening close to the floor, it will benecessary to increase its usefull sectionof at least 50%.

- If an open fire is present in the same roomit needs an indipendent air supply, othe-rwise the installation of a type B applianceis not permitted.

- If in the room there are other devices whi-ch need air for their operation (e.g. a wallexhauster) the section of the ventilationopening has to be the properly sized.

Indirect ventilationIn case it is not possible to make a room ven-tilation opening on an external wall, it is pos-sible to have an indirect ventilation, suctingthe air from an adjacent room, making an ope-ning in the lowest part of a door.This solution is possible only if:- The adjacent room is not a bed room- The adjacent room is not a common part

of the building and is not a room with firedanger (e.g. a fuel deposit, a garage, etc..)

FORCED DRAUGHT ROOM SEALED BOI-LER(TYPE C12 - C32 - C42 - C52 - C62 - C82)The IVEN 04 CTFS 24 F - IVEN 04 RTFS 24 -IVEN 04 CTFS 28 F - IVEN 04 RTFS 28 areforced draught, room sealed boilers; so theydo not need particular ventilation openings for

the combustion air, in the room in which theyare installed.

FORCED DRAUGHT, OPEN FLUE BOILER(TYPE B22)If the IVEN 04 CTFS 24 F - IVEN 04 RTFS 24- IVEN 04 CTFS 28 F - IVEN 04 RTFS 28 areinstalled in a room according to the chimneyconfiguration on type B22, the same ventila-tion requirements established in paragraphsDirect ventilation and Indirect ventilationapply.

12

Installation info

fig. 8

2 Ø min.

Pendenzamin. 3%

Ø

1,5

m m

in.

2 Ø 1 m max.

1,5

m m

in.

2 Ø

ØPendenzamin. 3%

1 m max.

2 Ø min.

> 3

Ø>

3 Ø

fig. 9

210Ø 130

200

Direct emission into the atmosphere

Natural draught boilers can discharge combu-stion products directly into the atmosphereusing a duct, which goes through the outsidewalls of the building, connected to a flueexhaust terminal.The exhaust duct must also comply with thefollowing requirements:- the sub-horizontal part inside the building

must be as short as possible (no more than1 m);

- for boilers with vertical discharge, such asboilers IVEN 04 CTN 24 F, IVEN 04 RTN24, there must be no more than 2 directionchanges;

- it must receive the discharge from a singleboiler;

- the part going through the wall must beprotected by a sheath duct; the part of thesheath duct facing the inside of the buil-ding must be sealed and the part facingoutwards must be open;

- the final section, on which the draught ter-minal will be fixed, must protrude from thewall of the building for a length of at leasttwice the diameter of the duct;

- the draught terminal must overlap the con-nection to the boiler by at least 1.5 m (seefig. 8).

DIMENSIONALS FOR CONNECTING FLUE GAS DUCT WARNING:The boiler is fitted with an automatic safetyreset device as protection against spillage ofcombustion products inside the building.If this device is activated the boiler will cut offand a fault will be indicated by the lockout(warning light G) fig. 35.After the cooling down of the smoke thermo-stat it will be possible to restart the boiler bypressing the reset button L fig. 35.

It is absolutely forbidden toby-pass the smoke thermo-stat.If the boiler cuts off regularly, it

is necessary to ask a technician for a checkof the flue gas exhaust duct. This duct maybe obstructed or may be unsuitable for thedischarge of flue gas into the atmosphere.

UNICAL refuses all liability fordamage caused as a result of in-correct installation, use, modifica-

tion of the boilers or for non-observance ofthe instructions provided by the manufactureror applicable installation regulations

13

Installation info

2.2.6 - SMOKE DISCARGE ANDAIR SUCTION DUCTCONFIGURATIONC12, C32, C42, C52, C62,C82 - B22

typeC12

typeC32

typeC52

type C82

typeC62

typeC42

SEPARATEtype B22

C12 Boiler designed for connection to hori-zontal exhaust and suction terminalsdirectly into the atmosphereusing coaxial or dual ducts. The distan-ce between the air intake duct and theflue gas outlet duct must be at least250 mm and both end sections mustbe located within a 500 mm square.

C32 Boiler designed for connection to verti-cal discharge and suction outlets directlyinto the atmosphereusing coaxial or dual ducts. The distan-ce between the air intake duct and theflue gas outlet duct must be at least250 mm and both end sections mustbe located within a 500 mm square.

C42 Boiler designed for connection to col-lective chimneys including two ducts,one for the suction of com-bustion air and the other for the exhaustof the combustion products,through coaxial or dual ducts.

The chimney must comply with rele-vant applicable law provisions.

C52 Boiler with separate combustion air suction and combustion productexhaust ducts.These ducts can discharge into are-as with different pressure.The dual ducts must not be locatedon two opposite walls.

C62 Boiler that has to be connected to asystem of air supply and smoke of ap-proved type and sold apart.

C82 Boiler designed for connection to an airsupply terminal and fitted to an indivi-dual or shared chimney.

The chimney must comply with rele-vant applicable law provisions.

B22 Boiler designed for connection to anexternal flue gas evacuation duct, withthe air for combustion taken from theroom in which the boiler is installed.For this type of installation the boilerhouse follows the same installation re-quirements used for the open type boi-lers.

Note: type B22is not approved by

Turkish market.

14

Installation info

fig. 10

Pursuant to the directives of regulations inforce, discharge of forced draught boilers can

2.2.7 - POSITIONING OF TERMINALS FOR TYPE ‘’C’’BOILERS

either take place through the roof or directlyoutwards the room they are installed in. Thefollowing distances shall be considered forterminals proper positioning:

POSITIONING OF TERMINALS FOR "FORCED DRAUGHT" BOILERS

Min.POSITIONING OF THE TERMINAL distances in mm.

Under a window A 600Under a ventilation opening B 600Under a gutter C 300Under a balcony (1) D 300From an adjancent window E 400From an adjacent ventilation opening F 600From vertical or horizontal air pipes or drains (2) G 300From an external corner of the building H 300From an internal corner of the building I 300From the ground or from another floor L 2500Between two vertical terminals M 1500Between two horizontal terminals N 1000From a facing front surface without opening or teminals within a radiusof 3 mt. from smoke outlet point O 2000As above, but with openings or terminals within a radius of 3 mt. fromsmoke outlet point P 3000

NOTES(1) Terminals below a practicable balcony shall be arranged in such a way as to assure that the total run of smokes, from their outlet from

terminal up to outlet from balcony external perimeter, including the height of protection baluster, if any, is not less than 2 m.(2) Distances of not less than 500 mm shall be adopted in placing the terminals, due to the proximity to materials subject to the action of

products of combustion such as plastic gutters or waterspouts, wooden jetties, etc.) unless adequate screeening measures are taken forthe said materials.

FLUE TERMINAL POSITIONING

15

Installation info

2.2.8 - SMOKE EVACUATION Ø 80WITH AIR SUCTIONFLANGE - Type B22(see par. 2.2.6)

Note: For evacuation system with 80 mm dia.and a lenght between 0.5 m and 4 m, itis necessary to introduce a diaphragmof 44 mm dia. supplied with the boiler inthe plastic bag, into the fun outlet adap-tor (see fig. 11).

The maximum allowed length for a smo-ke pipe of Ø80 mm dia. is 20 m (forIVEN 04 RTFS 24 e IVEN 04 CTFS 24F) and 25 m (for IVEN 04 RTFS 24 eIVEN 04 CTFS 28 F), included a wideradium curve and one smoke terminal.

For this type of installation the chim-ney has to serve just one boiler, i.e. theboiler must have its indipendent smo-ke duct.

fig. 11

fig. 12

DiaphragmØ 44 mm

Fitting of the diaphragm Ø44

WARNING:For the installation where thereis a freezing risk it is dia. sug-gested to insulate the smokeduct 80 mm on all its length,

both in case it discharges from a vertical wallor in a chimney.

16

Installation info

2.2.9 - DISCHARGE OF FLUEGAS INTOCOAXIAL DUCTSØ 100/60 mm

Type C12The minimum length of horizontal co-axialducts is 0.5 metres. The maximum allowablelength of horizontal co-axial ducts is 3 me-tres; for each additional bend the maximumallowable length must be reduced by 1 metre.Moreover, the duct must have a downward dipof 1% towards the outlet point to prevent rainwater from getting into the duct.

Type C32The minimum length of vertical coaxial ductsis 0.5 metres. The maximum allowable lengthof vertical coaxial ducts is 4 metres exclu-ding the stack (Ø80/125); for each additionalbend the maximum allowable length must bereduced by 1 metre.

The diaphragm Ø 44 supplied with the boi-ler must be inserted in the flue gas exhaustpipe as shown in figure 13, for installa-tions with horizontal coaxial pipe up to 1m and with vertical coaxial pipe up to 2 m.

fig. 13

VERTICAL FLUE DUCT WITHCOAXIAL DUCT Ø 80/125

Tipo C32The minimum length of vertical co-axial ductsis 1,2 metres. The maximum allowable lengthof vertical coaxial ducts is 6 metres exclu-ding the stack (Ø80/125); for each additionalbend the maximum allowable length must bereduced by 1 metre.

The diaphragm Ø44 supplied with the boi-ler must be inserted in the flue gas exhaustpipe, as shown in figure 14, for installa-tions with a coaxial pipe up to 2,5 m.

fig. 14

Diaframma Ø 44 mm

Ø 60/100

Ø 80/125

Ø 80/125

Ø 80/125

Rubber foamgasket

Up

to 2

m

Up to 1 m

Up

to 2

,5 m

Rubber foamgasket

DiaphragmØ 44

DiaphragmØ 44

17

Installation info

fig. 15

245

100

95

2.2.10 - FLUE GAS DISCHARGEAND AIR SUCTION WITHDUAL DUCTS WITH 80 mmDIAMETER

NB: The maximum allowable pressure loss,irrespective of the type of installation, mustnot exceed 50 Pa (for per IVEN 04 RTFS 24 /CTFS 24 F) and 60 Pa (for IVEN 04 RTFS 28/ CTFS 28 F)

For all installations with a pressure loss of theducts not exceeding 20 Pa, the diaphragmsupplied with the boiler must be installed insi-de the flue gas outlet pipe (see fig. 16).

WARNING! In case the flue ducthas to cross walls or floors, or ifit is easily reachable, it is ne-cessary to foresee a convenientinsulation of such a duct. Theflue duct, during the operationof the boiler can reach tempera-tures higher than 120°C.

fig. 16

DIMENSIONS FOR CONNECTING TO COAXIAL FLUE GAS DUCTS

Up to ∆∆∆∆∆ P = 20 Pa

Rubber foamgasket

DiaphragmØ 44

IMPORTANTFlue gas pressure switch operation

The boiler is fitted with a device control-ling flue gas pressure.This device shuts down the boiler in theevent of a malfunction.

This situation is not indicated by the emer-gency light.The safety device needs to be reset byswitching OFF and ON.

18

Installation info

fig. 17

fig. 18

_> 50

0

Example N.1

Hmin. = 150 mm

CONFIGURAZIONI RELATIVE ALLE TUBA-ZIONI SIA DI SCARICO CHE DI ASPIRAZIO-NE Ø 80

DIMENSIONS FOR CONNECTING THE AIR INTAKE AND THE FLUE GAS DISCHARGEWITH DUAL DUCTS

Example N.1 (fig. 18)

Primary air suction from perimeter wall andflue gas discharge on roof.

Maximum allowable pressure loss:50 Pa (IVEN 04 TFS 24)60 Pa (IVEN 04 TFS 28)

85 85245

Ø 80

8516

024

5

8585

85 85

19

Installation info

CALCULATION OF PRESSURE LOSSESFOR DISCHARGE AND SUCTION DUCTS

Bear in mind the following parameters whencalculating pressure losses:- for each metre of duct with Ø 80 (both

suction and discharge) the pressure lossis 2 Pa;

- for each 90° Ø 80 (R=D) bend with longradius, the pressure loss is 2 Pa;

- for each 90° Ø 80 (R=½ D) bend withshort radius, the pressure loss is 6 Pa insuction and 8 Pa in discharge;

- for the Ø 80 L = 0.5 m horizontal air inletterminal, the pressure loss is 3 Pa;

- for the Ø 80 L = 0.6 m horizontaldischarge end section, the pressure lossis 5 Pa;

- 2 short radius 90° Ø 80 curves + 1adapter Ø 80, the pressure loss is 14Pa.

fig. 20

fig. 19

2.2.11- MEASUREMENTS OFCOMBUSTION EFFICIENCY

Ducts Ø 80 type B22 (C)

Coaxial ducts (A)

Dual ducts Ø 80 (B)

To determine combustion efficiency the fol-lowing measurements must be made:

- the combustion air temperature measuredin hole 2 (see fig. 20).

- the flue gas temperature and CO2 % mea-sured in hole 1 (see fig. 20).

Make these measurements with the boilerrunning in a steady state condition.

135

45

C

Sondaanalizzatore

2

1

250

min

.

Sondaanalizzatore

NB: These values refer to di-scharges through original UNI-CAL non-flexible and smoothducts.

Example of check using wide radiusbends:- 2 Ø 80 long radius 90° bends + 1 adapter

Ø 80(14 Pa)

- (TFS 28) 17 mt duct Ø 80 x 2 =(34 Pa)

- (TFS 24) 12 mt duct Ø 80 x 2 =(24 Pa)

- 2 90° Ø 80 long radius bends x 4 =8 Pa

- horizontal Ø 80 air inlet terminal =3 Pa

- horizontal Ø 80 terminal =5 Pa

Tot. pressure loss (TFS 28) = 60 PaTot. pressure loss (TFS 24) = 50 Pa

1

2 Sondaanalizzatore

Sondaanalizzatore

Fumi

Aria

A

Example N.2 (fig. 19)Primary air suction from perimeter wall andflue gas discharge from the same outside pe-rimeter wall.Maximum allowable pressure loss:50 Pa (IVEN 04 TFS 24)60 Pa (IVEN 04 TFS 28)

Example N.2

Aria

Sondaanalizzatore

1

Fumi

B

2

20

Installation info

2.2.12 - CONNECTION TO THE GASMAINS

The supply pipe must have a section which isthe same as or greater than the one used inthe boiler.Comply with the applicable local installationrequirements which shall be considered ashaving been incorporated in full in this ma-nual.Before opening the internal gas supply system;i.e. before connecting the gas meter, all sealsmust be checked.If any part of the system is concealed the sealsmust be checked before the pipes are cove-red.The seal test must be conducted using air ornitrogen at a pressure of at least 100 mbar.The commissioning of the boiler also inclu-des the following operations and checks:- Opening of the gas gate valve and venting

2.2.13 - HYDRAULIC CONNECTION

Before installing the boiler we recommend thatthe system be cleaned to remove any impuri-ties which could originate from componentsand which could risk damaging the circulatingpump and heat exchanger.

Note: The use of solvents could damagethe components of the heating cir-cuit.

PRELIMINARY OPERATIONS:Act on the coupled spring (located in the lowerpart) and remove the two screws (located inthe upper part) in order to remove the casing.

fig. 21

of the air contained in the piping and ap-pliances, proceding appliance by applian-ce

- Check, with the gate valve of all the ap-pliance Off, that there are no gas leaks.During the 2nd quarter of a hour from thebeginning of the test no pressure reduc-tion is to be detected on the gas pressure

Move the control panel in the high position forthe hydraulic connection. Remove the threescrews "A" fixing the panel and then placethe panel in correspondence to the low holes"B" and fix the panel.

After having carried out the connections, re-store the panel's normal position.

HEATINGThe heating flow and return must be connectedto the relevant ¾” connections of the boiler Mand R (see fig. 7).When determining the size of the heating cir-cuit pipes it is essential to bear in mind thepressure losses induced by radiators, any ther-mostatic valves, radiator cut-off valves andthe configuration of the system.In the boiler, onto a bass group positioned,between the flow and return an automatic by-pass device is fitted (about a differential val-ve with a flow rate of about 150 l/h) which gua- fig. 22A

B

C

D

To OPEN theBy-passrotate the screwanti-clockwise

To CLOSE theBy-passrotate thescrewclockwise

Note:The control panel can be mo-ved in two positions beyond the nor-mal position ‘’D’’, that is to say highand low position, in order to makethe maintenance operations easy.

rantees always minimum flow rate throughtthe heat exchanger, also in the case, for in-stance, that all the thermostatic valves fittedon the radiators, are closed. It is possible toadjust the by-pass by acting onto the adju-sting screw (see fig. 21)We recommend that the discharge of the sa-fety valve mounted in the boiler be conveyedinto the sewer.

If this precaution is not taken, activation ofthe safety valve may result in flooding of theroom where the boiler is installed.

UNICAL shall not be held responsible for da-mage caused by non-observance of this tech-nical precaution.

D.H.W.Outlet and inlet of D.H.W. must be connectedto the relevant ½” connections of the boiler Cand F (see fig. 7).

The hardness of the supply water affects thefrequency of the cleaning of the heat exchan-ger.

gauge. If gas leaks have to be found, useonly water soap solution or any other spe-cific gas leak detector which can be avai-lable on the market. Never look for gas le-aks using a nacked flame.

While connecting gas inlet pipe of the boiler to the pipe coming fromgas network, it is MANDATORY to insert a TIGHT GASKET, whosedimensions and material must be adequate. Connection is NOT sui-table for hemp, teflon strip or similar materialsAVVERTENZA!

21

Installation info

fig. 23

IVEN 04 RTN 24 - IVEN 04 RTFS 24

IVEN 04 CTN 24 F - IVEN 04 CTFS 24 F

IVEN 04 CTFS 28 F - IVEN 04 RTFS 28

6,26,05,85,65,45,25,04,84,64,44,24,03,83,63,43,23,02,82,62,42,22,01,81,61,41,21,00,80,60,40,2

00 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

V1V2

V3

6,26,05,85,65,45,25,04,84,64,44,24,03,83,63,43,23,02,82,62,42,22,01,81,61,41,21,00,80,60,40,2

00 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

V1V2

V3

6,26,05,85,65,45,25,04,84,64,44,24,03,83,63,43,23,02,82,62,42,22,01,81,61,41,21,00,80,60,40,2

00 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

V1V2 V3

DIAGRAM FLOW RATE/MANOMETRIC HEAD AVAILABLE FOR THE CH SYSTEM

Man

omet

ric

Hea

d av

aila

ble

in m

W.G

.

Flow rate Q (l/h)

Note: The boiler is delivered with the by-pass in OPEN position.= By-Pass CLOSED - - - - - - - - = By-Pass OPEN

Man

omet

ric

Hea

d av

aila

ble

in m

W.G

.

Flow rate Q (l/h)

Man

omet

ric

Hea

d av

aila

ble

in m

W.G

.

Flow rate Q (l/h)

22

Installation infoWARNINGDepending on the hardness ofthe supply water, it is impor-tant to assess the convenien-ce of installing a domesticdevice to dose water treat-ment products which can beused to treat the drinking wa-ter.It is always advisable to treatthe water if the supply water hasa hardness value of more than28°f.

As far as concerns the positio-ning size of the "E" stirrup, youhave to consider the templatein the figure 7 (size 730.5 mm -optional kit).

2.2.14 - ARRANGEMENTS FOR AD.H.W. TANK (for boiler typesproviding only heating)

This Kit permits an only heating boiler (typeIVEN 04 RTN 24, RTFS 24 or RTFS 28.) toproduce sanitary warm water (through the useof an external D.H.W. tank).

PRELIMINARY OPERATIONSAct on the coupled spring (located in the lowerpart) and remove the two screws (located inthe upper part) in order to remove the shell.In order to install such a kit, you have to movethe control panel in the lower position. Thenunloose the three fixing screws "A" two onthe side and one on the back of the panel bo-ard, and place the panel in correspondence tothe upper holes "C" and fix the panel.

If the boiler is already installed, go on with theemptying of the boiler- Relate for the discharge connection of the

safety valve a plastic pipe with hose adap-ter, whose length canreach a drain.

- Remove the components from 1 to 6 of fig.25/A and assemble the components from1 to 6 contained in the kit and shown in thefig. 25 B; also remove the minimum pres-sure switch from the C.H. flow group andplace it on manifold of the diverting valve.

- Connect electrically the connector from thepanel board to the actuator of the divertingvalve. See detail "F"fig. 25.

- Connect the cable of the D.H.W. sensorfrom the panel board (colour BLUE -BROWN, see detail "G") to the cable ofthe D.H.W.sensor kept in the kit (which hasto be placed in the sheath of the externalD.H.W. tank) through two terminals provi-ded with the kit.

fig. 24

E

fig. 25

1

2

3 46

25

1

3

4

6

A

B

F

G

E

INSTALLATION WITH PRE-PIPING KIT(OPTIONAL 00360808)

ARRANGEMENTS FOR A CONNECTION TO AN EXTERNAL D.H.W. TANK

COMPONENTS TO BE REMOVED1 - SAFETY VALVE2 - NIPPLE3 - FLOW PIPE4 - CLOSING CAP6 - MINIMUM PRESSURE SWITCH

COMPONENTS TO BE ADDED1 - ELECTRIC DIVERTING VALVE2 - ACTUATOR3 - FLOW PIPE TO D.H.W. TANK4 - RETURN PIPE FROM D.H.W. TANK5 - FLOW PIPE TO DIVERTING VALVE6 - MINIMUM PRESSURE WITCH

23

Installation info

A B

ARRANGEMENTS FOR A CONNECTION TO AN EXTERNAL D.H.W. TANK

2.2.15 - ELECTICAL CONNECTIONS

The electrical connections of Logamax areshown in the clause ‘’WIRING DIAGRAMS’’(par. 2.3 - pag. 24)

The boiler must be connected tothe mains supply at230 V - 50 Hz. This connection isto be perfectly done, as foreseen

by the IEC and local rules and must be ear-thed.This fundamental requirement for safety pur-poses must be checked; in case of doubt,ask for a professionally qualified technicianto check the electrical system.UNICAL disclaims all liability for damage orinjury caused by failure to earth the systemproperly.Gas, domestic water and central heatingpipes are not suitable for earthing purpo-ses.The boiler is supplied with 1.5 m long3x0,75mm² cord.A double pole switch with a distance betweenthe contacts higher than 3 mm, must be in-stalled upstream the boiler to enable all main-tenance operations to be carried out safely.

Access to the electrical terminal strip- WARNING! Switch off the electrical sup-

ply- Remove the casing.- Remove the four screws (A) and the cover

(B) in order to get access to the connec-tions area.

Replacement of the feeding cordShould the feeding cord be replaced, you haveto use the original cable code 00610308.- Approach the feeding connector Y2.- Introduce the feeding cord through the ex-

tractable cable clamp.- Extract the connector Y2 and proceed with

the connections according to the positionsand to the colours. The female faston ofthe earth wire must be introduced in themale faston GND1.

Connection of the ON/OFF room thermo-stat (RT)- Approach the connector Y1.- Remove the existing jumper and connect,

on its place the room thermostat cable,passing it through one of the cable clam-ps avaible.

Connection of the room modulating ther-mostat (OT)- Approach the connector Y1.- Connect the room thermostat cable, pas-

sing it through one of the cable clampsavaible.

- The modulating chronothermostat is to beconnected exactly to the same terminal ofthe ON/OFF room thermostat; in this casethe jumper JP2 has to be changed of posi-tion (see. par 2.3.2).

For a multi-zones temperature control it is notpossible to install the modulating chronother-most.

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

Relation between the temperature (°C) and nominal resistance (Ohm)of the heating sensor SR and D.H.W. sensor SS

TABLE OF RESISTANCE VALUES AS A FUNCTION OF THE TEMPERATUREOF THE HEATING SENSOR (SR) AND D.H.W. SENSOR (SS)

T°C 0 1 2 3 4 5 6 7 8 90 32755 31137 29607 28161 26795 25502 24278 23121 22025 2098710 20003 19072 18189 17351 16557 15803 15088 14410 13765 1315320 12571 12019 11493 10994 10519 10067 9636 9227 8837 846630 8112 7775 7454 7147 6855 6577 6311 6057 5815 558440 5363 5152 4951 4758 4574 4398 4230 4069 3915 376850 3627 3491 3362 3238 3119 3006 2897 2792 2692 259660 2504 2415 2330 2249 2171 2096 2023 1954 1888 182470 1762 1703 1646 1592 1539 1488 1440 1393 1348 130480 1263 1222 1183 1146 1110 1075 1042 1010 979 94990 920 892 865 839 814 790 766 744 722 701

24

Installation info

fig. 26

2.3W

IRIN

G D

IAG

RA

M

2.3.1A

CTU

AL W

IRIN

G D

IAG

RA

M

LEGENDAA1...A8 = ConnectorsY1 = Room thermostat 24 V connectorY2 = Electrical supply connectorIG = ON/OFF switchTA = Room thermostat (optional)VG = Gas valveE. RIV = Ionisation electrodeE. ACC = Ignition electrode

V = Fan (only for TFS)PV = Fan pressure switch (only for TFS)TL = H.L. ThermostatTF = Flue-gas spillage thermostat

(only for TN)P = Circulating pumpDK = Minimum water pressure switchSR = C.H. sensorFL = Rotary flow switch (only for CTN-CTFS)

SS = D.H.W. sensor (only for CTN-CTFS)SS * = D.H.W. sensor (only for boiler with external D.H.W.

tank)MVD = Motor 3 way valve (optional for only heating boiler).

WH

ITE

WH

ITE

WH

ITE

BR

OW

N

BL

UE

BL

UE

BL

UE

BL

UE

WH

ITE

WH

ITE

NE

RO

WH

ITE

YE

LL

OW

-GR

EE

N

BL

UE

BR

OW

N

RE

D

GR

EE

N

GIA

/VE

R

BL

UE

BR

OW

N

BL

AC

K

YE

LL

OW

-GR

EE

N

BL

UE

BL

AC

K

OR

AN

GE

SA

FE

TY

V

ALV

E(V

1)

MO

DU

LAT

ING

VA

LVE

(V2

)

SSFL SRDK

5 4 3 2 1 4 3 2 1

A3

COM

NA

TL TF TL

A4

321 4321 4

N

L NC NA

C

V PV

A5

54321 54321

RTN 24 / CTN 24 FRTF 24 / RTF 28

CTFS 24 F / CTFS 28 F

Y1

6

A2

SS *

5 4 3 2 16

IG

A7

TA

E. RIV.

TEFLON WHITE

FS1

TEFLON RED

IGNITION TRASFORMER SUPPLY

(L1

)

(L2

)

VG

PE

654321

A6

E. ACC. 2

TEFLON RED

E. ACC. 1

1

2

Y2

N

L

POWER SUPPLY230 V - 50 Hz

654321

YE

LLO

W-G

RE

EN

BLU

E GR

EE

N

WH

ITE

RE

D

BR

OW

N

P

7

(L1)

(N)

654321

P

7

(L1)

(N)

A8

RTN 24 - RTFS 24 - RTFS 28CTN 24 F /

CTFS 24 F / CTFS 28 F

A8

654321 7

4321

A3

A6

12

34

56

A5

54321 A4

4 3 2 1JP1

JP2

6 5 4 3 2 1

A2

A1

4321 765

GN

D1

GN

D2

GN

D3

GN

D4

GN

D5

FS1

Y2 Y1A7

21 F1 N LOT/RT

321A9

OTRT

LPG NAT

ONLD1

CHLD2

FLAMELD3

LOCKOUTLD4

SWEEPER RESET

SW1SW2

P1

CH

P2

DHW

P3

Max P

P4

MIN

P5

IGT

L N

21

OT/RT

M

23

0V-5

0H

zC

.H.

MDV

WH

ITE

BL

AC

K

BR

OW

N

YE

LLO

W-G

RE

EN

BL

U

BR

OW

N

WH

ITE

BR

OW

N

RE

D

RE

D

BLU

E

BR

OW

N

BL

AC

K

BL

UE

BR

OW

N

D.H

.W.

YE

LLO

W-G

RE

EN

BLU

E

BR

OW

N

CTN 24 F / CTFS 24 F / CTFS 28 F RTN 24/ CTN 24 F

RFT 24 F / RFT 28 CTFS 24 F / CTFS 28 FRTN 24 / RTFS 24

25

Installation info

JP2

OT

RT

OT

RT

LPG

JP1

NAT

LPG

NATA B

2.4 - FILLING THESYSTEM

EAfter completing all the connections of thesystem the heating circuit can be filled.This filling operation must be performed withcare as follows:- open the air vents of the radiators and che-

ck that the automatic air vent in the boileris works properly;

- gradually open the water tap and checkoperation of any automatic air vents instal-led in the system;

- close the air vents on the radiators as soonas water comes out;

- use the pressure gauge on the boiler tocheck that the pressure has reached thevalue of 0.8/1bar;

- close the water inlet tap and then releasethe air again through the radiator air vents;

- after switching on the boiler and after thesystem has reached the correct tempera-ture, stop the pump and repeat the air re-lief operations;

- let the system cool down and then adjustthe water pressure to 0.8/1 bar.

WARNINGThe minimum water pressureswitch does not give electrical

fig. 27

2.3.2 - JUMPER LOCATION

They are placed on the modulation card andtheir purpose is to settle basic operational fun-ctions.In order to get access to the jumper:

- WARNING! switch off electrical supply.- Remove the casing.- Remove the four screws (A) and the cover

(B) in order to get access to the connec-tions area.

JP1: For nat. gas boilers, the jumper is onNAT.For LPG boilers, the jumper is on LPG.

JP2: SETTLEMET OF THE CHRONOTHER-MOSTAT TYPEFor modulating chronothermostat the jumperis on OTFor ON / OFF thermostat (delivery condition)the jumper is in RT.

FILLING TAP

impulse to the burner to ignite when the pres-sure is lower than 0.4 bar. The pressure of thewater in the C.H. system must not be lowerthan 0.8/1bar; if this value is lower use thewater filling tap on the boiler to adjust the pres-sure.This must be performed when the system iscold. Use the temperature and pressure gau-ge on the boiler to read the pressure value ofthe circuit.NB: After a given period of inactivity andwithout electrical supply the pump could beblocked.Before switching on the boiler it is importantto restart the pump as follows: loosen the pro-tection screw in the centre of the pump motor,insert a screwdriver in the hole and then ma-nually rotate the pump shaft clockwise.Once the pump has been restarted tighten theprotection screw and check that there are nowater leaks.

WARNINGOnce the protection screw has been removed

a little water may leak out. Before replacingthe casing of the boiler dry any wet surfaces.

2.5 - STARTING THE BOILER

PRELIMINARY CHECKS

Before starting the boiler check that:- the boiler installation has been made in

accordance with all the applicable regula-tions concerning water and gas installation,smoke evacuation and electrical installa-tion

- the flue gas exhaust duct and its terminalare installed correctly: when the boiler isswitched on there must be no leakageof any combustion products from anyseals;

- the supply voltage of the boiler is 230 V-50 Hz;

- the system is correctly filled with water(pressure at the gauge 0.8/1 bar);

- any gate valves taps of the system areopen;

- the mains gas corresponds to that withwhich the boiler has been calibrated: othe-rwise, convert the boiler to use the gasavailable (see section: “MODIFICATIONFOR OTHER GASES “): this operationmust be performed by qualified techni-cians;

- the gas supply tap is open;- there are no gas leaks;

- the external mains switch is on;- the boiler’s safety valve is not locked;- there are no water leaks.

SWITCHING ON AND OFF

To switch on and off the boiler follow the indi-cations in the “Users’ Instructions”.

26

Adjustment info

fig. 28

A

fig. 31

D

fig. 30

fig. 29

B

1 2 3

1 2 3

Pressure testnipple ''D''downstreamgas valve

Plug of max pressureadjust screew

Maximum pressureadjust screw ''B''

Pressuretest nippleupstreamgas valve

2.6 ADJUSTING THEBURNER

All the instructions below are for the exclusi-ve use of qualified technicians.All the boilers leave the factory calibrated andtested.If it is necessary to change the calibration fol-lowing changes in the type of gas or adapta-tion to the supply network conditions, it isnecessary to recalibrate the gas valve.To correctly regulate the gas valve, follow thesteps below:

1) Maximum output adjustment- check the value of the supply pressure (see

table NOZZLES - PRESSURES);- Unloose the screw ''D'' on the pressure test

nipple downstream the gas valve (fig. 30)and connect a pressure gauge as shownin figure 30;

- set the ''B'' knob (onto the panel board) tomax. position (fig.35);

- check that the room thermostat contactTA is closed;

- Switch on the power supply to the boilerand depress the ''chimney sweeper'' switch''H fig. 35'' on the panel board: in this waythe boiler will operate at maximum output;

- when the burner is ignited, check that the“MAXIMUM” pressure value correspondsto that indicated on the table “NOZZLES -PRESSURES”: if it does not, correct it byremoving the screw plug “A” (fig. 28) andby turning screw “B” (fig. 29) CLOCKWISEto increase, and ANTICLOCKWISE to de-crease

2) Minimum output adjustment- Depress a second time the ''chimney swee-

per'' switch ''H fig. 35'' on the panel board:in this way the boiler will operate at mini-mum output;

- when the burner is ignited, check the “MI-NIMUM” pressure value corresponds to thatindicated in the table “NOZZLES - PRES-SURES ”;

- correct the value, if necessary, turning theMIN GAS potentiometer 2 on the PCBusing a screwdriver (see fig.31).

3) Completion of the basic adjustement- check the minimum and maximum pres-

sure values of the gas valve;- if necessary make any fine adjustments- Disactivate the ''chimney sweeper'' func-

tion switching Off and On again throughthe ‘’A’’ switch fig. 35.

- Remove the plastic pipe from pressure testnipple and close the inner screw;

- Using a soapy solution check for gasleaks.

PRESSURE TESTNIPPLE

CLOCKWISEANTI-CLOCKWISE

CLOCKWISEANTI-CLOCKWISECLOCKWISE

ANTI-CLOCKWISE

27

Adjustment info

fig. 32

fig. 33

LPG

JP1

NAT

LPG

NAT

1

IVEN 04 CTN 24 F - IVEN 04 RTN 24

Gasconsump-

tionmax.

Natural gasPropanButan

10,07 - 23,8810,07 - 23,8810,07 - 23,88

11,5 - 26,511,5 - 26,511,5 - 26,5

2037

28-30

141414

---

IVEN 04 CTFS 24 F - IVEN 04 RTFS 24

9,95 - 23,949,95 - 23,949,95 - 23,94

11,5 - 26,511,5 - 26,511,5 - 26,5

2037

28-30

141414

---

IVEN 04 CTFS 28 F - IVEN 04 RTFS 28

9,8 - 27,459,8 - 27,459,8 - 27,45

11,5 - 30,511,5 - 30,511,5 - 30,5

2037

28-30

141414

---

Natural gasPropanButan

Natural gasPropanButan

1,250,750,75

2,16,44,6

11,032,125,8

1,22 m³/h0,89 kg/h0,91 kg/h

2,80 m³/h2,06 kg/h2,09 kg/h

1,250,75 0,75

2,06,24,8

10,835,327,1

1,22 m³/h0,89 kg/h0,91 kg/h

2,80 m³/h2,06 kg/h2,09 kg/h

1,250,780,78

2,14,43,7

13,835,527,4

1,23 m³/h0,89 kg/h0,91 kg/h

3,24 m³/h2,37 kg/h2,40 kg/h

JP1: For nat. gas boilers, the jumper ison NAT.For LPG boilers, the jumper is onLPG.

2.7 - MODIFICATION FOROTHER GASES

The boilers are manufactured for the type ofgas specifically required upon order.Any subsequent conversion must be perfor-med by qualified technicians who will use thekits supplied by Unical and perform the con-version and required adjustments for correctpreparation of the boiler for use.To convert the boiler from one type of gas toanother proceed as follows:

for conversion from natural gas to LPG- remove the main burner;- disassemble injectors “1” (fig. 32) of the

main burner and replace them with thosewith a diameter corresponding to the newtype of gas (see table “INJECTORS -PRESSURES”);

- reassemble the main burner;- position the jumper on the modulation PCB

in the panel board as shown in fig. 33- remove plug ‘’A’’ (fig.28) on the gas valve

and fully tighten max pressure adjustmentscrews ‘’B’’ (fig.29)

- check the pressure value upstream the gasvalve (see table “INJECTORS - PRESSU-RES”) and adjust the pressure of the bur-ner as indicated in section “ADJUSTINGTHE BURNER”

- check that the burner is functioning pro-perly;

- check that there are no gas leaks.- tighten the plug ”A” (fig.28) of the max

pressure adjustment screw- when the conversion is completed, fill in

label supplied with the kit with the informa-tion required and stick it onto the boileralongside the data plate.

for conversion from LPG to natural gas- remove the main burner;- disassemble injectors “1” (fig. 32) of the

main burner and replace them with thosewith a diameter corresponding to the newtype of gas (see table “INJECTORS -PRESSURES”);

- reassemble the main burner;- position the jumper on the modulation PCB

in the panel board as shown in figure 33;- remove plug ‘’A’’ (fig.28) on the gas valve- check the pressure value upstream the gas

valve (see table “INJECTORS - PRESSU-RES”) and adjust the burber pressure asindicated in section “ADJUSTING THEBURNER”;

- check that the burner is functioning pro-perly;

- check that there are no gas leaks.- tighten the plug “A” (fig.28) of the max

pressure adjustment screw;- when the conversion is completed, fill in

label supplied with the kit with the informa-tion required and stick it onto the boileralongside the data plate.

NominalOutput

(kW)

Nominalinput(kW)

Supplypressure(mbar)

ØDiaphragme

(mm)min.

(mbar)max

(mbar)

ØNozzles

(mm)

Gasconsump-

tionmin.

The pressures at the burner indicated in the following table must be checked after the boiler has been operating for 3 minutes.TABLE NOZZLES - PRESSION - DIAPHRAGME - CONSUMPTION

Tipe ofgas

No. ofNozzles

Burner pressure

Gasconsump-

tionmax.

NominalOutput

(kW)

Nominalinput(kW)

Supplypressure(mbar)

ØDiaphragme

(mm)min.

(mbar)max

(mbar)

ØNozzles

(mm)

Gasconsump-

tionmin.

Tipe ofgas

No. ofNozzles

Burner pressure

Gasconsump-

tionmax.

NominalOutput

(kW)

Nominalinput(kW)

Supplypressure(mbar)

ØDiaphragme

(mm)min.

(mbar)max

(mbar)

ØNozzles

(mm)

Gasconsump-

tionmin.

Tipe ofgas

No. ofNozzles

Burner pressure

28

Adjustment info

fig. 34

IVEN 04 CTN 24 F - IVEN 04 RTN 24 (A)

IVEN 04 CTFS 24 F - IVEN 04 RTFS 24 (B)

IVEN 04 CTFS 28 F - IVEN 04 RTFS 28 (C)

5

100 1 2 3 4 5 6 7 8 9 11 12 13 14 150

10

15

20

25

30

24,03

10,01

2,1 10,4

0 5 10 15 20 25 30 35 40

5,3 27,6

5 10 15 20 25 300 35 40

6,9 34,2

Out

put k

W

Natural gas G20 - 20 mbar

Butan 28-30 mbar

Propan 37 mbar

5

10

Out

put k

W

0 1 2 3 4 5 6 7 8 9 11 12 13 14 150

10

15

20

25

3028

9,8

1,7

0 5 10 15 20 25

3,6 27,5

5 10 15 20 25 30 350

13,8

Natural gas G20 - 20 mbar

Butan 28-30 mbar

Propan 36 mbar

5

100 1 2 3 4 5 6 7 8 9 11 12 13 14 150

10

15

20

25

30

24,5

9,95

1,7 10,6

0 5 10 15 20 25 30 35

4,8 27,3

5 10 15 20 25 30 35 400

Natural G20 - 20 mbar

Butan 28-30 mbar

Propan 36 mbar

Out

put k

W

2.8 ADJUSTEMENT OFTHE OUTPUT TOTHE C.H. SYSTEM'SNEEDS

Connect the pressure gauge to the burner aspreviously shown in fig. 30, switch on the boi-ler in heating mode and proceed as follows:- Wait about 50 sec. to allow the burner pres-

sure to reach the standard operating va-lue.

- Check the pressure value and through thediagrams of fig. 34 estimate if the boileroutput is correct for heating needs.

- If not, act on the adjuster ''1 CH-POWER''(fig. 31) on the panel board and turn it toreach the desired value (clockwise to in-crease, or anticlockwise to reduce thepressure).

- Then establish the pressure value corre-sponding to the required output.

Example:Assuming that the heating system which isusing a IVEN CTN 24 F boiler has a total ab-sorption of 17 kW. Using the graph ‘’A’’ in fi-gure 34 it is possible to determine the burnerpressure, which will be:

- 6,18 mbar if the boiler runs on natural gas- 20,5 mbar if the boiler runs on propan gas.- 16,3 mbar if the boiler runs on butan gas.

Acting on potentiometer 1 - CH POWER setthe pressure resulting from the diagram.

GAS PRESSURE BURNER DIAGRAM CORRESPONDING TOTHE SYSTEMS OUTPUT

29

Service info

2.9 FINDING CHART AND CORRECTIVE ACTIONS

In the table of faults and corrective actions, we intend to give some technical informations related to the solution of faults wich can happenduring the operation or the putting into operation.

SOLUTIONS

a) Replace the transformer

b) Reconnect or replace the ignition leads

c) Replace the electrode(s)

d) Replace the electronic PCB

a) Open the gas shut-off valve

b) Plug the pluginto the gas train

c) Adjust the pot.meter nr. 3 in a clock wisedirection to increase in anticlockwise di-rection to decrease the gas quantity du-ring ignition.

d) Replace the gas train

a) Reconnect or replace the cable

b) Replace the electrode

c) Reposition the electrode

d) Check the burner input at minimum rate

e) Replace the electronic PCB

a) Check the chimney and the combustion airintake grates

b) Check the temperature sensor and ascer-tain that the pump is not blocked

a) Check the good operation of the air pres-sure switch and replace if necessary..

b) Reconnect or replace the silicone pipes.

c) Check all the air/smoke ducts, clean orreplace if necessary.

d) Replace the fan.

e) Replace the electronic PCB

POSSIBLE CAUSES

a) The ignition transformer is faulty

b) The ignition leads are interrupted or discon-nected

c) The ignition electrodes have the insulatorbroken or are in short circuit with earth

d) The electronic board is faulty

a) The gas shut-off valve is closed

b) The plug to the gas train is not connected

c) the soft light is incorrectly adjusted

d) The gas train is faulty

a) The detection electrode cable is faulty or notconnected

b) The detection electrode is broken inside theinsulator (if only the insulator is broken doesnot matter)

c) The detection electrode is in short circuit withearth

d) The input at the minimum rate is not enough

e) The PCB does not detected the flame

a)* The chimney draught is not correct

b) The H.L. thermostat has cut in.An over heating of the heat exchanger oc-currend.

a)* The flue gas pressure switch is faulty.

b)* The silicon pipes are disconnected or bro-ken.

c)* There is insufficient combustion air suctionor flue gas discharge.

d)* The fan does not work.

e)* The PCB is faulty

BOILERS STATUS

The boiler is in lock-out position and the redlight G is on.

INCONVENIENT:The burner does not ignite because thereis no spark at the ignition electrodes

After the removal of the fault’s cause pressthe reset button on the control panel to resto-re

The boiler is in lock-out position and the redlight G is on.

INCONVENIENT:The burner does not ignite even if there isthe spark at the ignition electrode

After the removal of the fault’s cause pressthe reset button on the control panel to resto-re

The boiler is in lock-out position and the redlight G is on.

INCONVENIENT:The burner ignites for a few seconds andthen goes out

After the removal of the fault’s cause pressthe reset button on the control panel to resto-re

The boiler is in lock-out position and the redlight G is on.

INCONVENIENT:The boilers does not try to make the igni-tion procedure because:- The smoke thermostat has cut the cir-cuit (only for boilers Logamax U014 - Lo-gamax U014 K - Logamax U014 VMC - Lo-gamax U014 K VMC)- The H.L. thermostat has cut the circuit

After the removal of the fault’s cause pressthe reset button L on the control panel torestore

The boiler is in permanent lock-out.The red light G in on and the green light F isblinking

INCONVENIENTS: The smoke pressureswitch did not give the permission for theburner ignition

Reset from this status can be done byswtching OFF and ON the main switch A

* These conditions are detected as ignition failure (vedi 2.10.3)

30

Service info

1. Adjustment of maximumoutput in heating modeIt allows to adapt the boiler ou-tput to the actual C.H. needs byadjusting the burner pressure:By rotating the trimmer 1clockwise the pressure increases;By rotating anticlockwise thepressure decreases.

2. Adjustment of themodulation currentAllows to adjust the minimum gaspressure

THIS ADJUSTEMENTS MUSTBE CARRIED OUT SOLELY BYTRAINED TECHNICIANS

To accede to the trimmer it is necessary todismantle the electrical panel

The uncontrolled adjustment of the pot.meter can jeopardize the correct opera-tion of the boiler

WARNING The adjustments of the pot. meter 1-2-3 arecarried out by the constructor.

3. Adjustment of the softlightAllows to adjust the burnerpressure at the ignition time.

1

2

3

SOLUTIONS

a) Check the status of the system

b) Check the pump.

a) Heat the boiler inside until the temperatu-re exceeds 2°C.

b) Replace D.H.W. sensor.

c) Reconnect or replace it.

d) Set the correct pressure value.

e) Reconnect it.

f) Replace it.

a) Check the D.H.W. system.

b) Reconnect or replace it.

c) Reconnect it.

d) Replace it.

POSSIBLE CAUSES

a) Water does not circulate in the heating sy-stem. Pipes are blocked, the thermostatic val-ves are closed or the system gate valves areclosed.

b) The circulation pump is blocked or is faulty

a) The boiler may be frozen. (2.10.7)

b) The D.H.W. sensor is faulty. (2.10.6)

c) One or both temperature sensors are discon-nected or faulty. (2.10.5 or 2.10.6)

d) There is insufficient water pressure in theC.H. system (2.10.2)

e) The minimum water pressure switch isdisconnected.

f) The The minimum water switch is faulty.

a) There are insufficient pressure or flow rate inthe D.H.W. system.

b) The flow switch sensor is disconnected orfaulty.

c) The flow switch is disconnected.

d) The flow switch is faulty.

BOILERS STATUS

The boilers is in permanent lock-out. The redlight G is off

INCONVENIENT:The heating sensor detects a temperaturehigher than 81°C

The reset is automatically done after the re-moval of the fault’s cause.

The boiler is in permanent lock-out. The redlight G is off

INCONVENIENTS:a) - The heating sensor detects atemperatur lower than 2°C

b) - The D.H.W. sensor detects a tempera-tur higher than 62°C

c) - The PCB does not detected the pre-sence of either or both temperature sen-sor

d) - e) - f) The minimum water pressureswitch does not give the burner the per-mission to ignite.

The boiler does not operate in D.H.W. mode

INCONVENIENT:The D.H.W. flow switch does not operate

* These conditions are detected as error codes (see 2.10.2 - 2.10.5 - 2.10.6 - 2.10.7)

31

Service info

2.10 FAILURE CODES

In case of failure the burner is automatically switched off, and thecobination of different LEDs on the panel board (E.F.G. see fig. 34)show the fault code.Each fault is characterised by a priority level: if different failuresare detected at the same time, the code of the highest priority oneis shown.The following failure codes are recognised:

2.10.1 - LOCKOUT (priority 7)

Description:Lockout of the flame control due to H.L. thermostat or smokethermostat cut-off or loss of flame signal.

2.10.2 - LACK OF WATER (priority 6)

Description:Insufficient water pressure: intervention of minimum water pressu-re switch.

2.10.3 - IGNITION FAILURE (priority 5)

Description:No flame has been detected within 20" from the start of the ignitionprocedure and the burner control lockout has not intervened.

2.10.4 - WRONG FLAME DETECTION (priority 4)Description:False flame has been detected at ignition start-up

2.10.5 - CH TEMPERATURE SENSOR (priority 3)Description:CH sensor interruption or short circuit.

2.10.6 - DHW TEMPERATURE SENSOR (priority 2)Description:DHW sensor interruption or short circuit. This failure is not de-tected if DHW mode is disabled.

2.10.7 - FROST (priority 1)

Description:Freezing of the heat exchanger is detected if CH sensor < 2°C;ignition in inhibited until CH sensor reaches 5°C.

WARNING:If within the end of the ignition there is no flame detection theboiler goes into permanent lockout.To reset it will be necessary to push the reset button.

E F G

E F G

E F G

E F G

E F G

E F G

E F G

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

OFFOFFON

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

OFFOFFBLINK

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

OFFBLINKON

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

OFFONON

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

ONOFFBLINK

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

BLINKOFFBLINK

LED StatusCH MODE (E)FLAME (F)LOCKOUT (G)

BLINKBLINKBLINK

32

Service info

fig. 35

B

D

AC

E F G H L

IVEN 04 CTN 24 F - IVEN 04 CTFS 24 F - IVEN 04 CTFS 28 F

B

D

AC

E F G H L

IVEN 04 RTN 24 - IVEN 04 RTFS 24 - IVEN 04 RTFS 28

ON / OFF switch (A)- With the switch in the I positionthe electrical supply is ON- With the switch in the 0 posi-tion the electrical supply is OFF

Summer/Winter switch + C.H.temperature control (B)You can select which mode touse by turning this knob.

If the knob is in the following po-sition – – it indicates thatthe boiler is working only for do-

mestic hot water productionand that the temperature canbe adjusted turning knob ''C''.

If the knob is set within the ran-ge indicated by the arrow onthe illustration it means that theboiler always gives priority tothe production of domestic hotwater (if it is requested) andcontrols the temperature of thewater of the heating circuit froma minimum of 45°C to a maxi-mum of 78°C.

D.H.W. temperature control(C) (Only for IVEN CTN/CTFS)If the knob is set within therange indicated by the arrowon the illustration it means ispossibile to adjust the dome-stic hot water temperature.The temperature can be con-trolled from a minimum of35°C to a maximum of 57°C.

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IVEN 04

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IVEN 04

A = On / Off switchB = Summer / Winter switch + C.H. tempe-

rature controlC = D.H.W. temperature control (+ Antifrost

protection

USERS' INSTRUCTION

3.1 - CONTROL PANEL

3

of an eventual external storage tank IVEN RTN -RTFS)D = Power on lamp (green)E = C.H. request lamp (green)

F = Burner on lamp (green)G = Burner lockout warning lamp (red)H = Chimney sweeper push buttonL = Reset button

33

Service info

ting request. If at the same timethere is a request for domestic hotwater the lamp switches off.

Burner ON lamp (Green) (F)When this lamp is illuminated itindicates that the burner is on,both for central heating or for do-mestic hot water production.

Burner lockout warning lamp(G)The function of this lamp is to si-gnal that the burner’s control is inlockout position, due to

- lack of gas or- H.L. thermostat cut-out due to an

over-heating of the boiler (95°)

In the first case, if the burner doesnot fire, it will be necessary toverify if the gas gate valve isopen.

In the second case due to a lackof circulation or to an excessivescaling deposit in the heatexchanger the H.L. thermostatcould shut down the boiler at 95°C.

Reset Button (L)In the first case, which we pre-viously described, in order to reli-ght the boiler it will be necessaryto press the button (L) using a nailor something like that.In the second case, before pres-sing the button (L), it will be ne-cessary to wait for the tempera-

D.H.W. temperature control(C) + No Frost (Only for IVENRTN / RTFS when combinedwith an external D.H.W. tank)If the knob is set within therange indicated by the arrowon the illustration it means ispossibile to adjust the D.H.W.temperature from a minimumof 25°C to a maximum of57°C.

The reference to the knob inthe position points out that theboiler's sanitary circuit is notin operation (in that case the-re is no production D.H.W.). Ifin the mean time the B knobis in the position the anti-freeze protection of an exter-nal D.H.W. tank is activated.

Note: for IVEN RTN/RTFSwhen a D.H.W. storage tankis not fitted, the knob (C)must be positioned andmust stay onto thesymbol

Power ON lamp (Green) (D)When this lamp is illumina-ted it indicates that the boileris connected to the mains sup-ply.

CH request lamp (Green) (E)If this lamp is illuminated itindicates that there is a hea-

ture of the H.L. thermostat 95°Cto drop at least of 25 K.

Chimney-sweeper push button(H)This button allows the starting ofchimney-sweepers function, thatis to say that the boiler works atmaximum power (or at minimumpower) in order to allow adjust-ment’s operations and combu-stion's tests.By pushing one time the button,the boiler works at maximum ou-tput. ( )

By pushing the button while theboiler works at maximum output,the boiler will work at minimum ou-tput. ( )

To go back to the boiler normaloperation switch OFF and ON theboiler via the A switch.

3.2 SWITCHINGON / OFF

For the operation of the boiler in the WINTERmode the knob ''B'' reference must be posi-tioned within the range indicated by the arrowon the figure shown above. The limit of thearrow corresponds to the minimum and maxi-mum temperature values of 45°C and 78°C.

SWITCHING ON

D.H.W. temperature adjust-ment range for the models:IVEN 04 CTN/CTFS

D.H.W. temperature adjust-ment range for the models:IVEN 04 RTN/RTFSwhen conbined with anexternal D.H.W. tank.

C

C

BB

Note: If a room thermostat is fitted, set it tothe desired temperature.

SWITCHING OFF

Switch off the boiler by acting on the switch''A''.

For the operation the boiler in SUMMER mode,only for domestic hot water production, theknob ''B'' reference has to be positioned onthe SUN and the D.H.W. temperaturevalue has to be adjusted using the knob ''C''.

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Shut off the gas cock upstream theboiler in case a prolonged inactivi-ty period of the same is expected.

34

Service info

The boiler is fitted with an anti-freeze systemwhich is automatically activated when the tem-perature of the boiler water drops below 6°C:the burner is automatically switched on andthe pump started until the temperature of thewater in the boiler reaches 16°C.

3.3 ANTI FROSTPROTECTION

B C

A similar function prevent an external D.H.W.tank from freezing when in conjunction with aIVEN RTN-CTN if the C knob is positionedon .

WARNING!

This anti-freezing protectiondoes not work when the boileris disconnected from the electri-cal supply and/or the gas is clo-sed.

This system protects the boiler and the even-tual DHW tank from the freezing, but it doesnot protect the C.H. and sanitary circuits.Moreover special anti-freeze products suita-ble for the multimetal installations can effecti-vely protect the heating system from the free-ze.Do not use the anti-freeze products for car'sengines because they can damage the wa-

ter sealing gaskets.

The anti-freeze protection system, which isabove described, can not work when, for anyreasons, there is no electricity or gas supply.

When the temperature detected by the hea-ting sensor is under 2 °C, the boiler's opera-tion is automatically inhibited until the tempe-rature raises again to 5 °C.To ascertain that the heat exchanger is notfrozen, open the warm water taps. When youget water (cold too), you can suppose that theexchanger is not frozen. On the contrary, whenyou get no water, the exchanger is frozen. Inthat case it is necessary to apply to a servicetechnician which. will work to thaw the heatexchanger using a hair dryer.

3.4 IMPORTANTSUGGESTIONAND NOTES

The boiler must be serviced once a year byqualified personnel.

Correct maintenance allows the boiler to workoptimally, respecting the environment andwithout endangering people, animals and pro-perty.

Only qualified and technical personnel canmake adjustment onto the gas valve.

No-one, including qualified personnel, isauthorized to make modifications to theboiler.

Check regularly the pressure of the boiler wa-ter through the pressure gauge fitted onto thepanel board, and restore it, if necessary.

If some fault appears during the operation, theboiler is automatically put in lockout positionand the red warning lamp (G) lights. In thiscase proceed as follows:- Ascertain that the gas cock is open and thatthere is gas in the gas pipe (try to ignite a gascooker)- If so, wait one minute before resetting theboiler by depressing the L push button. If theboiler does not start and goes into lockoutposition after three times, ask for a service orfor a qualified technician.

If the boiler goes into lockout position frequen-tly, indication of a repeatetive fault in the ope-ration, ask for a service or for a qualified te-chnician

WARNINGIn case an open flue boiler (TN) the burnerlockout can be due to the intervention of thesmoke thermostat (antispillage thermostat). In

this case to restart the boiler it is necessaryto depress the reset push button L.This fault, if repeated in the time, means of abad chimney operation. Ask a qualified tech-nician for a check.

If the boiler remains inactive and disconnectedfrom the power supply for long periods it maybe necessary to unlock the pump.

This operation, which entails disassemblingthe outside casing and working on internalparts of the boiler, must be performed by qua-lified personnel.

It is possible to prevent the pump fromblocking by adding special filming productssuitable for multi-metal systems to the water.

If the boiler is not disconnected from the mainspower supply the pump will not block becau-se the boiler’s PCB has an anti-jamming pro-gramme. In this case the pump goes into ope-ration for a 5 seconds after 24 hour of inactivi-ty.

The boiler has a temperature and pressuregauge which allows you to check the tempe-rature and pressure of the water in the heatingsystem.

The pressure of the water must be around 1bar when the C.H. system is cold.

If this value drops then use the filling cock toadjust to the correct value.

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WARNINGThe anti-frost protection is ope-rational only if the boiler is con-

WARNINGAfter adjusting the pressure, clo-se the tap without over-tightening

it. If the tap is not closed properly the pressu-re could rise, resulting in the safety valve ope-ning and the water leaking.

nected to the mains supply and the gas cockis open

Information for the userThe user can access only the parts of the boilerwhich can be reached without the need for to-ols and/or implements: it is therefore forbid-den to disassemble the outer casing of theboiler and tamper with the interior parts.

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The Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press. Also reservesthe right to bring those changes that it will hold necessary to it own products or profits, without jeopardizing its essentialcharacteristics.

AG S.P.A.46033 casteldario - mantova - italia - tel. 0376/57001 (r.a.) - fax 0376/660556

www.unical.ag - [email protected]