Unical RTN 24, RTFS 24, RTFS 28, CTN 24 F, CTFS 24 F Installation, Use And Maintenance Manual

...

Download

IVEN

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

00331967 - 1a edition - 02/2004

INSTALLATION USE

AND MAINTENANCE

General info

IMPORTANT

This INSTRUCTION MANUAL, which is an integral and indispensable part of the product, must be handed over to the user by the plumbers and must 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 therefore dangerous.

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

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 the schedule 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’s electronic 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-freeze products 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 source of 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, is suggested.

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.

DATA PLATE

General info

G20

G30/G31

G30 - 31

3B/P

G31

1 = P.I.N. code 2 = Boiler type (only for condensing boiler) 3 = (S.N°) Serial Nr. 4 = Manufacture Date 5 = Model 6 = Appliance type 7 = Elettrical supply 8 = Maximum absorbed power - Insulation

protection

9 = (Pn) Nominal Output

20 - 25

28-30/ 37

30 - 50

37 - 50

mbar

IT ES IE

PT GR

TR HR

CZ SK

CN RU RO

LV EE LT

II 2H3+

II 2H3B/P

II 2H3P

II 2HS 3B/P

II 2E3P

II 2H3P

I 2H

10 = (Pcond) Condensing Nominal Output

(only for condensing boiler) 11 = (D) Specific flow rate EN 625 12 = (Qn) Nominal heat input 13 = (Qnw) Nominal heat input for D.H.W.

system if there are different out puts

between the C.H. and D.H.W. circuits 14 = (NOx) NOx Class 15 = (PMS) Max pressure C.H. system 16 = (T max) Max Temperature C.H. system

20 ; 28-30/37 mbar

20 ; 50 mbar

18 ; 50 mbar

25 ; 30 mbar

20 ; 50 mbar

20 ; 37 mbar

20 mbar

17 = (PMW) Max pressure D.H.W. system 18 = (T max) Temperature D.H.W. system 19 = Adjusted for gas type X 20 = Country of destination, Gas category,

Supply pressure

21 = EN standards applicable to the boiler

type

GAS VALVE LABEL

Translation

While connecting gas inlet pipe of the boiler to the

pipe coming from gas network, it is MANDATORY to

insert a TIGHT GASKET, whose dimensions and material

must be adequate. Connection is NOT suitable for

hemp, teflon strip or similar materials

003319 80

General info

For your own safety, observe these safety instructions.:

WARNING

Identifies potentially dangerous situations.

WARNING

from risk of electric shock.

TECHNICAL FEATURES

AND DIMENSIONS .......................................................... pag. 5

1.1 Technical features ................................................................... pag. 5

1.2 Dimensions .............................................................................. pag. 5

1.3 Hydraulic circuits..................................................................... pag. 6

1.4 Technical data ......................................................................... pag. 8

1.5 Main characteristics ................................................................ pag. 8

DIRECTIONS FOR

INSTALLERS ......................................................................... pag. 9

2.1 Installations rules .................................................................... pag. 9

2.2 Installation ............................................................................... pag. 9

2.2.1 Packing ....................................................................... pag. 9

2.2.2 Positioning the boiler .................................................. pag. 10

2.2.3 Assembling the boiler ................................................. pag. 11

2.2.4 Ventilation ................................................................... pag. 11

2.2.5 Flue gas discharge system ........................................ pag. 11

2.2.6 Discharge and suction pipe configuration .................. pag. 13

2.2.7 Positioning of terminals for type C boilers .................. pag. 14

2.2.8 Smoke evacuation Ø80 air suction flange .................. pag. 15

2.2.9 Discharge of flue gas into coaxial ducts with a

diameter of 100/60 mm (Type A accessories) ........... pag. 16

2.2.10 Flue gas discharge and air suction with separate

pipes with 80 mm diameter ........................................ pag. 17

2.2.11 Measurements of combustion efficiency ................... pag. 16

2.2.12 Connection to the gas mains ...................................... pag. 20

2.2.13 Hydraulic connection .................................................. pag. 20

2.2.14 Arrangement for a D.H.W. tank................................... pag. 22

2.2.15 Electrical connection .................................................. pag. 23

2.3 Wiring diagram......................................................................... pag. 24

2.3.1 Pratical connection diagram ....................................... pag. 24

2.3.2 Jumper location .......................................................... pag. 25

2.4 Filling the system .................................................................... pag. 25

2.5 Starting the boiler .................................................................... pag. 25

2.6 Adjusting the burner ................................................................ pag. 26

2.7 Modification of other gases ..................................................... pag. 27

2.8 Adjustement of the output to ch system's needs ................... pag. 29

2.9 Finding chart and corrective actions ...................................... pag. 29

2.10 Failure code ............................................................................. pag. 31

PLEASE NOTE:

User tip for the optimum utilisation and setting of the control(s) plus useful information.

3.1 Control panel ........................................................................... pag. 32

3.2 Switching on/off ....................................................................... pag. 33

3.3 Antifrost protection .................................................................. pag. 34

3.4 Important suggestion and notes ............................................. pag. 34

USERS' INSTRUCTION ............................................... pag. 32

TECHNICAL FEATURES AND DIMENSIONS

Installation info

1.1 - TECHNICAL FEATURES

IVEN 04 is a wall hung gas boiler with built-in

atmospheric gas burner; it is available in the following 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

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

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

IVEN 04 CTFS 24 F forced draught room sealed boiler, with electronic ignition and instantaneous D.H.W. production;

IVEN 04 RTFS 24 F forced draught room sealed boiler, with electronic ignition for heating only;

IVEN 04 CTFS 28 F forced draught room sealed boiler with electronic ignition and instantaneous D.H.W production;

04 series are the following:

IVEN 04 is supplied with all control and sa-

fety features according to the latest laws in force. The main technical features of the IVEN 04 boilers 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 12 l/min, for 28 kW boilers (pink)

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

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

• Control panel with IP 44 insulation protection

• Temperature and pressure gauge;

• Warning light for: presence of power, re-

quest for heating, burner in operation, lock out;

• 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) + summer/winter position.

• Reset button;

• Chimney sweeper button

• Mounting jig

• Mounting frame with valves (opt.)

• Flue gas antispillage thermostat 75°C

(IVEN 04 TN)

IVEN 04 RTFS 28 F forced draught room sealed boiler with electronic ignition for heating only;

1.2 - DIMENSION

420

800

345

fig. 1

Installation info

1.3 - HYDRAULIC CIRCUIT

IVEN 04 CTN 24 F

9 8

7 6

19 20

1 Heating circuit safety valve 2 Minimum water pressure switch 3 Filling valve (except French, Belgium

and England version) 4 D.H.W. temperature sensor 5 Gas valve 6 Expansion vessel 7 Burner nozzles 8 Expansion vessel filling valve 9 Ignition electrode 10 Bithermal heat exchanger 11 H.L. thermostat 12 Flue gas manifold/down-draught

dverter 13 Flue gas anti-spillage thermostat 14 Ionisation electrode 15 C.H. temperature sensor 16 Automatic air vent 17 Circulating pump 18 D.H.W. flow restrictor 10-12 l/min 19 Flow switch 20 Cold water filter 21 By-pass

M C.H. system flow C D.H.W. outlet G Gas inlet F D.C.W. inlet R C.H. system return

IVEN 04 CTFS 24 F - IVEN 04 CTFS 28 F

8 7

5 4

GMC

14 15

16 17

21 22

fig. 2

1 Heating circuit safety valve 2 Minimum water pressure switch 3 D.H.W. temperature sensor 4 Expansion vessel 5 Gas valve 6 Burner nozzles 7 Expansion vessel filling valve 8 Ignition electrode 9 Bithermal heat exchanger 10 H.L. thermostat 11 Room sealed combustion chamber 12 Flue gas extractor fan 13 Air/flue coaxial duct 14 Micro-switch on flue gas pressure

switch 15 Flue gas pressure switch 16 Ionisation electrode 17 Heating temperature sensor 18 Automatic air vent 19 Circulating pump 20 Filling valve (except French, Belgium

and England version) 21 D.H.W. flow restrictor 10-12 l/min 22 D.H.W. Flow switch 23 Cold water filter 24 By-pass

M C.H. system flow C D.H.W. outlet G Gas inlet F D.C.W. inlet R C.H. system return

fig. 3

General info

IVEN 04 RTN 24

1 Heating circuit safety valve 2 Minimum water pressure switch 3 Expansion vessel 4 Gas valve 5 Burner nozzles 6 Expansion vessel filling valve 7 Ionisation electrode 8 Heat exchanger 9 Flue gas manifold/down-draught

diverter 10 Flue gas anti-spillage thermostat 11 Ignition electrode 12 H.L. thermostat 13 C.H. temperature sensor 14 Automatic air vent 15 Circulating pump 16 Filling valve (except French,

Belgium and England version)

17 By-pass

M C.H. system flow G Gas inlet R C.H. system return

IVEN 04 RTFS 24 - IVEN 04 RTFS 28

6 5

12 13

14 15

fig. 4

1 Heating circuit safety valve 2 Low water level pressure switch 3 Expansion vessel 4 Gas valve 5 Burner nozzles 6 Expansion vessel filling valve 7 Ionisation electrode 8 Heat exchanger 9 Room sealed combustion chamber 10 Flue gas extractor fan 11 Air/flue coaxial duct 12 Micro-switch on flue gas pressure

switch 13 Flue gas pressure switch 14 H.L. thermostat 15 Ignition electrode 16 Heating temperature sensor 17 Automatic air vent 18 Circulating pump 19 Filling valve (except French,

Belgium and England version) 20 By-pass

M C.H. system flow G Gas inlet R C.H. system return

fig. 5

General info

1.4 - OPERATING DATA

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

Nominal output

Minimum output

Actual 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 l

NOX (value according EN 297/A3 + EN 483)

NOX class

Flue losses with burner in operation (min.-max)

Flue losses with burner off

IVEN 04

°C

g/s

mg/kWh

RTN 24

23,88

10,07

90,11

89,76

88,53

87,3

92,6

90,2

2,6 - 2,5

91,8

18-20

113,8

2,4-5,3

197

9,8 - 7,4

0,486

CTN 24 F

23,88

10,07

90,11

89,76

88,53

87,3

92,6

90,2

2,6 - 2,5

91,8

18-20

113,8

2,4-5,3

197

9,8 - 7,4

0,486

RTFS 24

23,94

9,95

90,34

89,76

88,60

87,14

93,3

87,9

1,88-2,96

112,5

13,64-14,38

67,7

3,0-7,4

157

12,1-6,7

0,295

CTFS 24 F

23,94

9,95

90,34

89,76

88,60

87,14

93,3

87,9

1,88-2,96

112,5

13,64-14,38

67,7

3,0-7,4

157

12,1-6,7

0,295

RTFS 28

27,45

9,80

90,01

89,88

87,43

87,32

93,2

86,8

1,76-3,19

87,7

17,5-17,6

60,86

2,65-7,9

163

13,2-6,8

0,256

CTFS 28 F

27,45

9,80

90,01

89,88

87,43

87,32

93,2

86,8

1,76-3,19

87,7

17,5-17,6

60,86

2,65-7,9

163

13,2-6,8

0,256

1.5 - GENERAL FEATURES

Appliance category

Min. water flow rate in CH circuit (Dt 20 K)

Min. pressure in CH circuit

Max. pressure in CH circuit

Water content primary circuit

Max. oper. temperature in CH mode

Min. oper. temperature in CH mode

Total capacity of expansion vessel

C.H. expansion vessel pre-loading

Max. water content CH circuit (calc. x max. T°of 82°C)

Min. water flow rate in D.H.W. circuit

Min. DHW. pressure

Max. DHW. pressure

DHW specific flow rate (Dt 30 K)

Flow restrictor

DHW production in continuous operation with Dt 45 K

DHW production in continuous operation with Dt 40 K

DHW production in continuous operation with Dt 35 K

DHW production in continuous operation with Dt 30 K*

DHW production in continuous operation with Dt 25 K*

DHW Temperature range

Electrical supply

Supply fuse

Maximun absorbed power

Insulation protection

Net weight

l/min

bar

°C

bar

l/min.

°C

V-Hz

A (F)

RTN 24

2H3+

7,2

0,5

3,5

183,9

230/50

X4D

CTN 24 F

2H3+

7,2

0,5

3,5

183,9

2,5

0,5

11,5

7,6

8,6

9,78

11,4

13,69

35 - 57

230/50

X4D

RTFS 24

2H3+

7,37

0,5

3,5

183,9

230/50

130

X4D

CTFS 24 F

2H3+

7,37

0,5

3,5

183,9

2,5

0,5

11,5

7,6

8,58

9,80

11,44

13,73

35 - 57

230/50

130

X4D

RTFS 28

2H3+

7,02

0,5

3,5

183,9

230/50

130

X4D

CTFS 28 F

2H3+

7,02

0,5

3,5

183,9

2,5

0,5

12,5

8,74

9,84

11,24

13,11

15,74

35 - 57

230/50

130

X4D

(*) mixed

Warning:If the boilers are used in low temperature heating system (ex. floor heating) it is necessary to use a mixing valve to avoid condensation phenomena.

DIRECTIONS FOR

INSTALLER

2.1 - DIRECTIONS FOR INSTALLER

Installation info

IVEN 04 is a gas boiler which must be installed in accordance with the latest regulations or rules in force. For the boiler category, which changes according to the destination country, see page 4.

NOTE:

Observe the corresponding technical rules and the building supervisory and statutory regulations of the country of final use when installing and operating the system.

2.2 - INSTALLATION

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 that it is intact.

Always ensure that an appropriately specialised company is entrusted with installation, gas supply and flue gas connection, commissioning and power supply connection, as well as all servicing and repair work. Work on gas conduits and fittings must only be carried out by a registered service provider. The system must be cleaned and serviced once a year. This includes an inspection

of the entire system to see if it is in full working order. Defects and faults must be eliminated immediately. Please note that we can accept no liability whatsoever for loss or injury resulting from unauthorised adjustment or manipulation of the system’s control or regulating devices.

Keep the packaging material (cardboard box, plastic strips, plastic bag, etc.) out of the reach of children as it represents a choking and suffocation hazard.

UNICAL refuses all liability for injury to persons and animals or damage to property resulting from non-observance of the above.

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

390

900

495

fig. 6

Installation info

2.2.2 - POSITIONING THE BOILER

Every boiler is supplied with special “MOUNTING JIG” with which the pipes for connection to the system, D.H.W. and gas can be positioned when the hydraulic system is being laid out and before the boiler is installed. This MOUNTING JIG, comprising a sheet of strong paper which must be fixed to the wall chosen for the installation of the boiler, gives all the indications needed to make the holes in the wall using two screws with expanding dowels. Use the lower part of the MOUNTING JIG to mark the exact point of the connection of the gas 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 operations.

- 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 in use (cookers which produce greasy steam, washing machines, etc.)

- avoid installing natural draught boilers in

corrosive or very dusty atmospheres such as hairdressers’, laundrettes, etc. as the life of the boiler components could be significantly shortened.

MOUNTING JIGS FOR BOILER CONNECTIONS

85 85

For IVEN 04 TFS

Since the temperature of the wall on which the boiler is installed and the temperature on the sur-

face of the coaxial duct do not increase, in normal operating conditions, more than 60 K, it is not necessary to keep a minimum distance from inflammable walls.

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

IVEN 04 TN

Maintain distance of at least 200

mm on the sides with wall which

have inflammable materials.

ØL mm

M = C.H. system

flow

C = D.H.W.

outlet

G =Gas F = Cold water

inlet

R = C.H. system

return

S = Safety valve

discharge

= 3/4'' 144

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

= 1/2'' 144

= 3/4'' 144

= 195,5

CONNECTION POSITION SEEN FROM ABOVE

153.5

Fil li ng of C.H. system

Safety valve discharge

195.5

144

fig. 7

2.2.3 - ASSEMBLING THE BOILER

Installation info

Before connecting the boiler to the D.H.W. and heating system pipes, carefully clean the pipes to remove all traces of metal resulting from processing and welding operations as well as any oil and grease which could damage the boiler or jeopardize its operation.

Unical refuses all liability for injury to persons and animals or damage to property resulting from non-observance of the above.

2.2.4 - VENTILATION

The boiler must be installed in a suitable room according to the rules in force and particularly:

NATURAL DRAUGHT OPEN FLUE BOILERS (TYPE B11bs INSTALLATION and VMC) The boliers IVEN 04 CTN 24 F, IVEN 04 RTN 24, are open flue boilers and are foreseen for

chimney connection: the air for combustion is taken directly from the room in which it is installed. The room can have both a direct ventilation (i.e. with ventilation openings facing outwards) or an indirect ventilation (i.e. with ventilation openings facing an adjacent room) provided that the following requirements are complied with:

Direct ventilation:

- The room has to have a ventilation ope-

ning of, at least, 6 cm² /kW of installed input (see input table on par. 2.7) and, in no case, lower than 100 cm² and made directly onto an external wall.

- The opening has to be as close as possi-

ble to the floor.

- It should not be possible to close it and it

should be protected with a grate not reducing its usefull ventilation section.

- A correct ventilation can be optained also

through the addition of more openings, provided the addition of the different sections is not less than that really needed.

Do not use solvents which could damage the components.

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 connection of the gas supply pipe, cold water supply pipe, D.H.W. outlet, CH flow and return in the positions shown by the template. ;

- fit the boiler onto the support hooks;

- In case it is not possible to make a ventilation opening close to the floor, it will be necessary to increase its usefull section of at least 50%.

- If an open fire is present in the same room it needs an indipendent air supply, otherwise the installation of a type B appliance is not permitted.

- If in the room there are other devices which need air for their operation (e.g. a wall exhauster) the section of the ventilation opening has to be the properly sized.

Indirect ventilation

In case it is not possible to make a room ventilation opening on an external wall, it is possible to have an indirect ventilation, sucting the air from an adjacent room, making an opening 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 fire danger (e.g. a fuel deposit, a garage, etc..)

FORCED DRAUGHT ROOM SEALED BOILER (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 are

forced draught, room sealed boilers; so they do not need particular ventilation openings for

- connect the boiler to the gas pipe, domestic cold and hot water pipes, CH flow and return pipes.

- connect to electrical supply

the combustion air, in the room in which they are 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 are

installed in a room according to the chimney configuration on type B22, the same ventilation requirements established in paragraphs Direct ventilation and Indirect ventilation apply.

2.2.5 - FLUE GAS DISCHARGE SYSTEM

NATURAL DRAUGHT OPEN FLUE BOILERS

Connection to the chimney

A good chimney is very important for the correct functioning of the boiler; it must therefore conform with the following requirements:

- it must be made from waterproof material

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

- it must have sufficient mechanical stren-

gth and low thermal conductivity;

- it must be perfectly sealed to prevent cooling due to parasite air inlets;

- it must be as vertical as possible and the end section must have a chimney cap which guarantees efficient and constant evacuation of the combustion products;

- the chimney must have a diameter not smaller than that of the boiler’s draught diverter; for chimneys with a square or rectangular section, the internal section must be 10% larger than the section of the connection duct to the draught diverter.

- starting from the draught diverter, the duct

must have a vertical section with a length more than twice the diameter, before getting into the chimney.

Installation info

Direct emission into the atmosphere

Natural draught boilers can discharge combustion products directly into the atmosphere using a duct, which goes through the outside walls of the building, connected to a flue exhaust terminal. The exhaust duct must also comply with the following requirements:

- the sub-horizontal part inside the building must be as short as possible (no more than 1 m);

- for boilers with vertical discharge, such as

boilers IVEN 04 CTN 24 F, IVEN 04 RTN 24, there must be no more than 2 direction changes;

- it must receive the discharge from a single boiler;

- the part going through the wall must be protected by a sheath duct; the part of the sheath duct facing the inside of the building must be sealed and the part facing outwards must be open;

- the final section, on which the draught terminal will be fixed, must protrude from the wall of the building for a length of at least twice the diameter of the duct;

- the draught terminal must overlap the connection to the boiler by at least 1.5 m (see fig. 8).

2 Ø min.

Pendenza min. 3%

1,5 m min.

2 Ø

DIMENSIONALS FOR CONNECTING FLUE GAS DUCT

1 m max.

200

210

Ø 130

1,5 m min.

2 Ø

2 Ø min.

Pendenza min. 3%

> 3 Ø

1 m max.

> 3 Ø

fig. 8

WARNING:

The boiler is fitted with an automatic safety reset device as protection against spillage of combustion products inside the building. If this device is activated the boiler will cut off and a fault will be indicated by the lockout (warning light G) fig. 35. After the cooling down of the smoke thermostat it will be possible to restart the boiler by pressing the reset button L fig. 35.

It is absolutely forbidden to by-pass the smoke thermostat.

If the boiler cuts off regularly, it is necessary to ask a technician for a check of the flue gas exhaust duct. This duct may be obstructed or may be unsuitable for the discharge of flue gas into the atmosphere.

UNICAL refuses all liability for damage caused as a result of incorrect installation, use, modifica-

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

fig. 9

2.2.6 - SMOKE DISCARGE AND AIR SUCTION DUCT CONFIGURATION C12, C32, C42, C52, C62, C82 - B22

C12 Boiler designed for connection to hori-

zontal exhaust and suction terminals directly into the atmosphere using coaxial or dual ducts. The distance between the air intake duct and the flue gas outlet duct must b e at least 250 mm and both end sections must be located within a 500 mm square.

C32 Boiler designed for connection to verti-

cal discharge and suction outlets directly into the atmosphere using coaxial or dual ducts. The distance between the air intake duct and the flue gas outlet duct must b e at least 250 mm and both end sections must be located within a 500 mm square.

Installation info

type C12

type C32

type

C42 Boiler designed for connection to col-

lective chimneys including two ducts, one for the suction of combustion air and the other for the exhaust of the combustion products, through coaxial or dual ducts.

The chimney must comply with relevant applicable law provisions.

C52 Boiler with separate combustion air

suction and combustion product exhaust ducts.

These ducts can discharge into areas with different pressure. The dual ducts must not be located on two opposite walls.

C62 Boiler that has to be connected to a

system of air supply and smoke of approved type and sold apart.

C82 Boiler designed for connection to an air

supply terminal and fitted to an individual or shared chimney.

The chimney must comply with relevant applicable law provisions.

C42

type C52

type C62

B22 Boiler designed for connection to an

external flue gas evacuation duct, with the air for combustion taken from the room in which the boiler is installed. For this type of installation the boiler house follows the same installation requirements used for the open type boilers.

Note: type B22

is not approved by

Turkish market.

type C82

type B22

SEPARATE

Installation info

2.2.7 - POSITIONING OF TERMI

NALS FOR TYPE ‘’C’’ BOILERS

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

POSITIONING OF TERMINALS FOR "FORCED DRAUGHT" BOILERS

POSITIONING OF THE TERMINAL distances in mm.

Under a window A 600

Under a ventilation opening B 600

Under a gutter C 300

Under a balcony (1) D 300

From an adjancent window E 400

From an adjacent ventilation opening F 600

From vertical or horizontal air pipes or drains (2) G 300

From an external corner of the building H 300

From an internal corner of the building I 300

From the ground or from another floor L 2500

Between two vertical terminals M 1500

Between two horizontal terminals N 1000

From a facing front surface without opening or teminals within a radius

of 3 mt. from smoke outlet point O 2000

As above, but with openings or terminals within a radius of 3 mt. from

smoke outlet point P 3000

either take place through the roof or directly outwards the room they are installed in. The following distances shall be considered for terminals proper positioning:

Min.

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 for the said materials.

FLUE TERMINAL POSITIONING

fig. 10

2.2.8 - SMOKE EVACUATION Ø 80

WITH AIR SUCTION FLANGE - 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, it

is necessary to introduce a diaphragm

of 44 mm dia. supplied with the boiler in

the 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 (for

IVEN 04 RTFS 24 e IVEN 04 CTFS 24 F) and 25 m (for IVEN 04 RTFS 24 e

IVEN 04 CTFS 28 F), included a wide

radium curve and one smoke terminal.

For this type of installation the chim-

ney has to serve just one boiler, i.e. the

boiler must have its indipendent smo-

ke duct.

Installation info

Diaphragm

Ø 44 mm

fig. 11

WARNING: For the installation where there is a freezing risk it is dia. suggested to insulate the smoke

both in case it discharges from a vertical wall or in a chimney.

duct 80 mm on all its length,

Fitting of the diaphragm Ø44

fig. 12

Installation info

2.2.9 - DISCHARGE OF FLUE

GAS INTO COAXIAL DUCTS Ø 100/60 mm

Typ e C1 2

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

Up to 1 m

Ø 80/125

Up to 2 m

Typ e C3 2

The minimum length of vertical coaxial ducts is 0.5 metres. The maximum allowable length of vertical coaxial ducts is 4 metres excluding the stack (Ø80/125); for each additional bend the maximum allowable length must be reduced by 1 metre.

The diaphragm Ø 44 supplied with the boiler must be inserted in the flue gas exhaust pipe as shown in figure 13, for installations with horizontal coaxial pipe up to 1 m and with vertical coaxial pipe up to 2 m.

VERTICAL FLUE DUCT WITH COAXIAL DUCT Ø 80/125

Tipo C32

The minimum length of vertical co-axial ducts is 1,2 metres. The maximum allowable length of vertical coaxial ducts is 6 metres excluding the stack (Ø80/125); for each additional bend the maximum allowable length must be reduced by 1 metre.

The diaphragm Ø44 supplied with the boiler must be inserted in the flue gas exhaust pipe, as shown in figure 14, for installations with a coaxial pipe up to 2,5 m.

Ø 60/100

Up to 2,5 m

Diaphragm

Ø 44

Rubber foam gasket

fig. 13

Ø 80/125

Diaframma Ø 44 mm

Rubber foam gasket

Diaphragm

Ø 44

fig. 14

Installation info

DIMENSIONS FOR CONNECTING TO COAXIAL FLUE GAS DUCTS

245

100

fig. 15

2.2.10 - FLUE GAS DISCHARGE

AND AIR SUCTION WITH DUAL DUCTS WITH 80 mm DIAMETER

NB: The maximum allowable pressure loss, irrespective of the type of installation, must not 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 the ducts not exceeding 20 Pa, the diaphragm supplied with the boiler must be installed inside the flue gas outlet pipe (see fig. 16).

WARNING! In case the flue duct has to cross walls or floors, or if it is easily reachable, it is necessary to foresee a convenient insulation of such a duct. The flue duct, during the operation of the boiler can reach temperatures higher than 120°C.

IMPORTANT Flue gas pressure switch operation

The boiler is fitted with a device controlling flue gas pressure. This device shuts down the boiler in the event of a malfunction.

Up to

∆∆

∆ P = 20 Pa

∆∆

Diaphragm Ø 44

Rubber foam gasket

This situation is not indicated by the emergency light. The safety device needs to be reset by switching OFF and ON.

fig. 16

Installation info

DIMENSIONS FOR CONNECTING THE AIR INTAKE AND THE FLUE GAS DISCHARGE WITH DUAL DUCTS

245

Ø 80

160

245

CONFIGURAZIONI RELATIVE ALLE TUBAZIONI SIA DI SCARICO CHE DI ASPIRAZIONE Ø 80

Example N.1 (fig. 18)

Primary air suction from perimeter wall and flue gas discharge on roof.

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

60 Pa (IVEN 04 TFS 28)

Example N.1

500

fig. 17

Hmin. = 150 mm

fig. 18

Installation info

Example N.2 (fig. 19)

Primary air suction from perimeter wall and flue gas discharge from the same outside perimeter wall. Maximum allowable pressure loss:

50 Pa (IVEN 04 TFS 24)

60 Pa (IVEN 04 TFS 28)

CALCULATION OF PRESSURE LOSSES FOR DISCHARGE AND SUCTION DUCTS

Bear in mind the following parameters when calculating pressure losses:

- for each metre of duct with Ø 80 (both

suction and discharge) the pressure loss is 2 Pa;

- for each 90° Ø 80 (R=D) bend with long

radius, the pressure loss is 2 Pa;

- for each 90° Ø 80 (R=½ D) bend with

short radius, the pressure loss is 6 Pa in suction and 8 Pa in discharge;

- for the Ø 80 L = 0.5 m horizontal air inlet

terminal, the pressure loss is 3 Pa;

- for the Ø 80 L = 0.6 m horizontal

discharge end section, the pressure loss is 5 Pa;

- 2 short radius 90° Ø 80 curves + 1

adapter Ø 80, the pressure loss is 14 Pa.

NB: These values refer to discharges through original UNICAL non-flexible and smooth ducts.

Example N.2

Example of check using wide radius bends:

- 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)

135

250 min.

fig. 19

- 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 Pa Tot. pressure loss (TFS 24) = 50 Pa

2.2.11- MEASUREMENTS OF

COMBUSTION EFFICIENCY

Ducts Ø 80 type B22 (C)

Coaxial ducts (A)

Dual ducts Ø 80 (B)

To determine combustion efficiency the following measurements must be made:

- the combustion air temperature measured

in hole 2 (see fig. 20).

- the flue gas temperature and CO2 % mea-

sured in hole 1 (see fig. 20).

Make these measurements with the boiler running in a steady state condition.

Sonda analizzatore

Aria

Fumi

Sonda analizzatore

Aria

fig. 20

Installation info

2.2.12 - CONNECTION TO THE GAS

MAINS

The supply pipe must have a section which is the same as or greater than the one used in the boiler. Comply with the applicable local installation requirements which shall be considered as having been incorporated in full in this manual. Before opening the internal gas supply system; i.e. before connecting the gas meter, all seals must be checked. If any part of the system is concealed the seals must be checked before the pipes are covered. The seal test must be conducted using air or nitrogen at a pressure of at least 100 mbar. The commissioning of the boiler also includes the following operations and checks:

- Opening of the gas gate valve and venting

2.2.13 - HYDRAULIC CONNECTION

Before installing the boiler we recommend that the system be cleaned to remove any impurities which could originate from components and which could risk damaging the circulating pump and heat exchanger.

Note: The use of solvents could damage

the components of the heating circuit.

of the air contained in the piping and appliances, proceding appliance by appliance

- Check, with the gate valve of all the appliance Off, that there are no gas leaks. During the 2nd quarter of a hour from the beginning of the test no pressure reduction is to be detected on the gas pressure

While connecting gas inlet pipe of the boiler to the pipe coming from gas network, it is MANDATORY to insert a TIGHT GASKET, whose dimensions and material must be adequate. Connection is NOT sui-

AVVERTENZA!

rantees always minimum flow rate throught the heat exchanger, also in the case, for instance, that all the thermostatic valves fitted on the radiators, are closed. It is possible to adjust the by-pass by acting onto the adjusting screw (see fig. 21) We recommend that the discharge of the safety valve mounted in the boiler be conveyed into the sewer.

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

table for hemp, teflon strip or similar materials

gauge. If gas leaks have to be found, use only water soap solution or any other specific gas leak detector which can be available on the market. Never look for gas leaks using a nacked flame.

The hardness of the supply water affects the frequency of the cleaning of the heat exchanger.

To OPEN the By-pass rotate the screw anti-clockwise

PRELIMINARY OPERATIONS:

Act on the coupled spring (located in the lower part) and remove the two screws (located in the upper part) in order to remove the casing.

Note:The control panel can be moved in two positions beyond the normal position ‘’D’’, that is to say high and low position, in order to make

the maintenance operations easy. Move the control panel in the high position for the hydraulic connection. Remove the three screws "A" fixing the panel and then place the panel in correspondence to the low holes "B" and fix the panel.

After having carried out the connections, restore the panel's normal position.

HEATING

The heating flow and return must be connected to the relevant ¾” connections of the boiler M and R (see fig. 7). When determining the size of the heating circuit pipes it is essential to bear in mind the pressure losses induced by radiators, any thermostatic valves, radiator cut-off valves and the configuration of the system. In the boiler, onto a bass group positioned, between the flow and return an automatic bypass device is fitted (about a differential valve with a flow rate of about 150 l/h) which gua-

UNICAL shall not be held responsible for damage caused by non-observance of this technical precaution.

D.H.W.

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

To CLOSE the By-pass rotate the screw clockwise

fig. 21

fig. 22

DIAGRAM FLOW RATE/MANOMETRIC HEAD AVAILABLE FOR THE CH SYSTEM

Installation info

IVEN 04 RTN 24 - IVEN 04 RTFS 24

6,2 6,0 5,8 5,6 5,4 5,2 5,0 4,8 4,6 4,4 4,2 4,0 3,8 3,6 3,4 3,2 3,0 2,8 2,6 2,4 2,2 2,0 1,8 1,6 1,4 1,2 1,0 0,8

Manometric Head available in mW.G.

0,6 0,4 0,2

0 50 1 00 1 50 200 250 3 00 350 4 00 450 5 00 550 600 6 50 7 00 7 50 800 850 900 9 50 1 000 1050 1100 1150 120 0

IVEN 04 CTN 24 F - IVEN 04 CTFS 24 F

6,2 6,0 5,8 5,6 5,4 5,2 5,0 4,8 4,6 4,4 4,2 4,0 3,8 3,6 3,4 3,2 3,0 2,8 2,6 2,4 2,2 2,0 1,8 1,6 1,4 1,2 1,0 0,8

Manometric Head available in mW.G.

0,6 0,4 0,2

0 50 1 00 1 50 200 250 3 00 350 4 00 450 5 00 550 600 6 50 7 00 7 50 800 850 900 9 50 1 000 1050 1100 1150 120 0

IVEN 04 CTFS 28 F - IVEN 04 RTFS 28

6,2 6,0 5,8 5,6 5,4 5,2 5,0 4,8 4,6 4,4 4,2 4,0 3,8 3,6 3,4 3,2 3,0 2,8 2,6 2,4 2,2 2,0 1,8 1,6 1,4 1,2 1,0 0,8

Manometric Head available in mW.G.

0,6 0,4 0,2

0 50 1 00 1 50 200 250 3 00 350 4 00 450 5 00 550 600 6 50 7 00 7 50 800 850 900 9 50 1 000 1050 1100 1150 120 0

Flow rate Q (l/h)

- - - - - - - - = By-Pass OPEN

= By-Pass CLOSED

Note: The boiler is delivered with the by-pass in OPEN position.

fig. 23

Installation info

WARNING Depending on the hardness of the supply water, it is important to assess the convenience of installing a domestic device to dose water treatment products which can be used to treat the drinking water.

It is always advisable to treat the water if the supply water has a hardness value of more than 28°f.

As far as concerns the positioning size of the "E" stirrup, you have to consider the template in the figure 7 (size 730.5 mm optional kit).

2.2.14 - ARRANGEMENTS FOR A

D.H.W. TANK (for boiler types providing only heating)

This Kit permits an only heating boiler (type IVEN 04 RTN 24, RTFS 24 or RTFS 28.) to produce sanitary warm water (through the use of an external D.H.W. tank).

PRELIMINARY OPERATIONS

Act on the coupled spring (located in the lower part) and remove the two screws (located in the upper part) in order to remove the shell. In order to install such a kit, you have to move the control panel in the lower position. Then unloose the three fixing screws "A" two on the side and one on the back of the panel board, and place the panel in correspondence to the upper holes "C" and fix the panel.

INSTALLATION WITH PRE-PIPING KIT (OPTIONAL 00360808)

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

COMPONENTS TO BE REMOVED

1 - SAFETY VALVE 2 - NIPPLE 3 - FLOW PIPE 4 - CLOSING CAP 6 - MINIMUM PRESSURE SWITCH

fig. 24

If the boiler is already installed, go on with the emptying of the boiler

- Relate for the discharge connection of the

safety valve a plastic pipe with hose adapter, whose length can reach a drain.

- Remove the components from 1 to 6 of fig.

25/A and assemble the components from 1 to 6 contained in the kit and shown in the fig. 25 B; also remove the minimum pressure switch from the C.H. flow group and place it on manifold of the diverting valve.

- Connect electrically the connector from the

panel board to the actuator of the diverting valve. See detail "F" fig. 25.

- Connect the cable of the D.H.W. sensor

from the panel board (colour BLUE BROWN, see detail "G") to the cable of the D.H.W.sensor kept in the kit (which has to be placed in the sheath of the external D.H.W. tank) through two terminals provided with the kit.

COMPONENTS TO BE ADDED

1 - ELECTRIC DIVERTING VALVE 2 - ACTUATOR 3 - FLOW PIPE TO D.H.W. TANK 4 - RETURN PIPE FROM D.H.W. TANK 5 - FLOW PIPE TO DIVERTING VALVE 6 - MINIMUM PRESSURE WITCH

fig. 25

2.2.15 - ELECTICAL CONNECTIONS

Installation info

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

The boiler must be connected to the mains supply at 230 V - 50 Hz. This connection is to be perfectly done, as foreseen

by the IEC and local rules and must be earthed. This fundamental requirement for safety purposes must be checked; in case of doubt, ask for a professionally qualified technician to check the electrical system. UNICAL disclaims all liability for damage or injury caused by failure to earth the system properly.

Gas, domestic water and central heating pipes are not suitable for earthing purposes.

The boiler is supplied with 1.5 m long 3x0,75mm² cord. A double pole switch with a distance between the contacts higher than 3 mm, must be installed upstream the boiler to enable all maintenance 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 connections area.

Connection of the ON/OFF room thermostat (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 clamps avaible.

Connection of the room modulating thermostat (OT)

- Approach the connector Y1.

- Connect the room thermostat cable, passing it through one of the cable clamps avaible.

- The modulating chronothermostat is to be connected exactly to the same terminal of the ON/OFF room thermostat; in this case the jumper JP2 has to be changed of position (see. par 2.3.2).

For a multi-zones temperature control it is not possible to install the modulating chronothermost.

Replacement of the feeding cord

Should the feeding cord be replaced, you have to use the original cable code 00610308.

- Approach the feeding connector Y2.

- Introduce the feeding cord through the extractable cable clamp.

- Extract the connector Y2 and proceed with the connections according to the positions and to the colours. The female faston of the earth wire must be introduced in the male faston GND1.

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

T°C0123456789

0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987 10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153 20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466 30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584 40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768 50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596 60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824 70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304 80 1263 1222 1183 1146 1110 1075 1042 1010 979 949 90 920 892 865 839 814 790 766 744 722 701

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

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

At 90°C, the nominal resistance is 920 Ohm

Installation info

2.3 WIRING DIAGRAM

2.3.1 ACTUAL WIRING DIAGRAM

E. RIV.

OT/ RT

LPG NAT

543

GND5

GND4

GND3

GND2

GND1

4321

321

654321

CTN 24 F /

CTFS 24 F / CTFS 28 F

(L1)

654321

(N)

RTN 24 - RTFS 24 - RTFS 28

FS1

1234

4 32

543

217

OTRT

JP2

765

4321

654321

JP1

OT/ RT

(L1 ) (N )

E. ACC. 1

BROWN

BLUE

YEL LOW-G REEN

TEFLON WHITE

FS1

654321

GREEN

C.H.

RED

WHI T E

D.H. W.

BROWN

BLUE

YELLOW-GREEN

230V-50Hz

MDV

RTF 2 4 / RTF 28

CTFS 24 F / CTFS 28 F

BLUE

BROWN

ORANGE

BLACK

BLUE

BLACK

YELLOW-GREEN

WHITE

RED

GRE EN

BROWN

BLUE

YELLOW-GREE N

E. ACC. 2

TEFLON RED

IGNITION

TRASFORMER

SUPPLY

GIA /V ER

(V2) VALVE

(L2)

(L1)

NCNA

VPV

MODU LATING

(V1) VALVE SAFETY

tank)

SS = D.H.W. sensor (only for CTN-CTFS)

SS * = D.H.W. sensor (only for boiler with external D.H.W.

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

54321 54321

IGT

MI N

Max P

DHW

SW2

SW1

RESET

SWEEPER

LOCKOU T

LD4

FLAME

LD3

LD2

RTN 24 / CTN 24 F

321

RFT 24 F / RFT 28

CTFS 24 F / CTFS 28 F

321

RTN 24/ CTN 24 F

LD1

543216

RTN 24 / RTFS 24

54321 432 1 6

CTN 24 F /

CTFS 24 F / CTFS 28 F

WHI TE

BLU

BROWN

YELLOW-GREEN

POWER S UPPLY

230 V - 5 0 H z

NERO

BLUE

WHITE

BLUE

TLTF TL

V = Fan (only for TFS)

WHITE

BROWN

WHITE

BROWN

BLUE

BLAC K

RED

BROWN

WHI T E

BLACK

BROWN

COM

BROWN

BLU E

SS *

SSFL SRDK

LEGENDA

A1...A8 = Connectors

(only for TN)

PV = Fan pressure switch (only for TFS)

TL = H.L. Thermostat

TF = Flue-gas spillage thermostat

P = Circulating pump

DK = Minimum water pressure switch

SR = C.H. sensor

FL = Rotary flow switch (only for CTN-CTFS)

Y1 = Room thermostat 24 V connector

Y2 = Electrical supply connector

IG = ON/OFF switch

TA = Room thermostat (optional)

VG = Gas valve

E. RIV = Ionisation electrode

E. ACC = Ignition electrode

fig. 26

2.3.2 - JUMPER LOCATION

They are placed on the modulation card and their purpose is to settle basic operational functions. 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 connections area.

LPG

JP1

NA T

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

NAT. For LPG boilers, the jumper is on LPG.

Installation info

JP2

JP2: SETTLEMET OF THE CHRONOTHERMOSTAT TYPE For modulating chronothermostat the jumper is on OT For ON / OFF thermostat (delivery condition) the jumper is in RT.

2.4 - FILLING THE

SYSTEM

EAfter completing all the connections of the system the heating circuit can be filled. This filling operation must be performed with care as follows:

- open the air vents of the radiators and check that the automatic air vent in the boiler is works properly;

- gradually open the water tap and check operation of any automatic air vents installed in the system;

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

- use the pressure gauge on the boiler to check that the pressure has reached the value of 0.8/1bar;

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

- after switching on the boiler and after the system has reached the correct temperature, stop the pump and repeat the air relief operations;

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

WARNING

The minimum water pressure switch does not give electrical

impulse to the burner to ignite when the pressure is lower than 0.4 bar. The pressure of the water in the C.H. system must not be lower than 0.8/1bar; if this value is lower use the water filling tap on the boiler to adjust the pressure. This must be performed when the system is cold. Use the temperature and pressure gauge on the boiler to read the pressure value of the circuit. NB: After a given period of inactivity and without electrical supply the pump could be blocked. Before switching on the boiler it is important to restart the pump as follows: loosen the protection screw in the centre of the pump motor, insert a screwdriver in the hole and then manually rotate the pump shaft clockwise. Once the pump has been restarted tighten the protection screw and check that there are no water leaks.

WARNING

Once the protection screw has been removed

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

FILLING TAP

fig. 27

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 regulations concerning water and gas installation, smoke evacuation and electrical installation

- the flue gas exhaust duct and its terminal are installed correctly: when the boiler is

switched on there must be no leakage of any combustion products from any seals;

- the supply voltage of the boiler is 230 V50 Hz;

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

- any gate valves taps of the system are open;

- the mains gas corresponds to that with which the boiler has been calibrated: otherwise, convert the boiler to use the gas available (see section: “MODIFICATION FOR OTHER GASES “): this operation

must be performed by qualified technicians;

- 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 indications in the “Users’ Instructions”.

Adjustment info

2.6 ADJUSTING THE BURNER

All the instructions below are for the exclusive use of qualified technicians. All the boilers leave the factory calibrated and tested. If it is necessary to change the calibration following changes in the type of gas or adaptation to the supply network conditions, it is necessary to recalibrate the gas valve. To correctly regulate the gas valve, follow the steps 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 shown in figure 30;

- set the ''B'' knob (onto the panel board) to

max. position (fig.35);

- check that the room thermostat contact

TA is closed;

- Switch on the power supply to the boiler

and depress the ''chimney sweeper'' switch ''H fig. 35'' on the panel board: in this way the boiler will operate at maximum output;

- when the burner is ignited, check that the

“MAXIMUM” pressure value corresponds to that indicated on the table “NOZZLES PRESSURES”: if it does not, correct it by removing the screw plug “A” (fig. 28) and by turning screw “B” (fig. 29) CLOCKWISE to increase, and ANTICLOCKWISE to decrease

Pressure test nipple upstream gas valve

Pressure test nipple ''D'' downstream gas valve

Plug of max pressure adjust screew

fig. 28

Maximum pressure adjust screw ''B''

fig. 29

PRESSURE TEST NIPPLE

fig. 30

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 minimum output;

- when the burner is ignited, check the “MI-

NIMUM” pressure value corresponds to that indicated in the table “NOZZLES - PRESSURES ”;

- correct the value, if necessary, turning the

MIN GAS potentiometer 2 on the PCB using 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 through the ‘’A’’ switch fig. 35.

- Remove the plastic pipe from pressure test

nipple and close the inner screw;

- Using a soapy solution check for gas

leaks.

CLOCKWISE

ANTICLOCKWISE

CLOCKWISE

ANTICLOCKWISE

CLOCKWISE

ANTICLOCKWISE

fig. 31

2.7 - MODIFICATION FOR

OTHER GASES

Adjustment info

The boilers are manufactured for the type of gas specifically required upon order. Any subsequent conversion must be performed by qualified technicians who will use the kits supplied by Unical and perform the conversion and required adjustments for correct preparation of the boiler for use. To convert the boiler from one type of gas to another 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 those with a diameter corresponding to the new type 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 adjustment screws ‘’B’’ (fig.29)

- check the pressure value upstream the gas

valve (see table “INJECTORS - PRESSURES”) and adjust the pressure of the burner as indicated in section “ADJUSTING THE 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 information required and stick it onto the boiler alongside 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 those with a diameter corresponding to the new type 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 - PRESSURES”) and adjust the burber pressure as indicated in section “ADJUSTING THE BURNER”;

- check that the burner is functioning properly;

- 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 information required and stick it onto the boiler alongside the data plate.

fig. 32

LPG

JP1

NA T

JP1: For nat. gas boilers, the jumper is

on NAT. For LPG boilers, the jumper is on LPG.

LPG

NA T

fig. 33

TABLE NOZZLES - PRESSION - DIAPHRAGME - CONSUMPTION

The pressures at the burner indicated in the following table must be checked after the boiler has been operating for 3 minutes.

Tipe of gas

Natural gas

Propan

Butan

Tipe of gas

Natural gas

Propan

Butan

Tipe of gas

Natural gas

Propan

Butan

Nominal

Output

(kW)

10,07 - 23,88

Nominal

Output

(kW)

9,95 - 23,94

Nominal

Output

(kW)

9,8 - 27,45

Nominal

input

(kW)

11,5 - 26,5

Nominal

input

(kW)

11,5 - 26,5

Nominal

input

(kW)

11,5 - 30,5

IVEN 04 CTN 24 F - IVEN 04 RTN 24

Supply

pressure

(mbar)

28-30

IVEN 04 CTFS 24 F - IVEN 04 RTFS 24

Supply

pressure

(mbar)

28-30

IVEN 04 CTFS 28 F - IVEN 04 RTFS 28

Supply

pressure

(mbar)

28-30

Nozzles

(mm)

1,25

0,75

Nozzles

(mm)

1,25

0,75

Nozzles

(mm)

1,25

0,78

No. of

Nozzles

No. of

Nozzles

No. of

Nozzles

Diaphragme

(mm)

Burner pressure

min.

(mbar)

2,1

6,4

4,6

Burner pressure

min.

(mbar)

2,0

6,2

4,8

Burner pressure

min.

(mbar)

2,1

4,4

3,7

max

(mbar)

11,0

32,1

25,8

max

(mbar)

10,8

35,3

27,1

max

(mbar)

13,8

35,5

27,4

consump-

1,22 m³/h

0,89 kg/h

0,91 kg/h

consump-

1,22 m³/h

0,89 kg/h

0,91 kg/h

consump-

1,23 m³/h

0,89 kg/h

0,91 kg/h

Gas

tion

min.

Gas

tion

min.

Gas

tion

min.

Gas

consump-

tion

max.

2,80 m³/h

2,06 kg/h

2,09 kg/h

Gas

consump-

tion

max.

2,80 m³/h

2,06 kg/h

2,09 kg/h

Gas

consump-

tion

max.

3,24 m³/h

2,37 kg/h

2,40 kg/h

Adjustment info

2.8 ADJUSTEMENT OF THE OUTPUT TO THE C.H. SYSTEM'S NEEDS

Connect the pressure gauge to the burner as previously shown in fig. 30, switch on the boiler in heating mode and proceed as follows:

- Wait about 50 sec. to allow the burner pres-

sure to reach the standard operating value.

- Check the pressure value and through the

diagrams of fig. 34 estimate if the boiler output is correct for heating needs.

- If not, act on the adjuster ''1 CH-POWER''

(fig. 31) on the panel board and turn it to reach the desired value (clockwise to increase, or anticlockwise to reduce the pressure).

- Then establish the pressure value corre-

sponding to the required output.

Example:

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

GAS PRESSURE BURNER DIAGRAM CORRESPONDING TO THE SYSTEMS OUTPUT

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

24, 0 3

Output kW

10,01

0123456789

Natural gas G20 - 20 mbar

Propan 37 mbar

2,1

6,9

5,3

15 20 25 30

5 10152025303540

Butan 28-30 mbar

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

24,5

10,4

34,2

35 40

27,6

12 13 14 15

- 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 set the pressure resulting from the diagram.

Output kW

9,95

0123456789

Natur al G20 - 20 mbar

Propan 36 mbar

0 5 10 15 20 25 30 3 5

Butan 28-30 mbar

1,7 10,6

4,8

20 25 3 0 3 5

27,3

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

Output kW

9,8

0123456789

1,7

Natur al gas G20 - 20 mbar

12 13 14 15

13,8

Propan 36 mbar

Butan 28-30 mbar

510

3,6

15 20

10 15

30 35

20 25

27,5

fig. 34

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 happen during the operation or the putting into operation.

BOILERS STATUS

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

INCONVENIENT:

The burner does not ignite because there is no spark at the ignition electrodes

After the removal of the fault’s cause press the reset button on the control panel to restore

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

INCONVENIENT:

The burner does not ignite even if there is the spark at the ignition electrode

After the removal of the fault’s cause press the reset button on the control panel to restore

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

INCONVENIENT:

The burner ignites for a few seconds and then goes out

After the removal of the fault’s cause press the reset button on the control panel to restore

POSSIBLE CAUSES

a) The ignition transformer is faulty

b) The ignition leads are interrupted or discon-

nected

c) The ignition electrodes have the insulator

broken 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 not

connected

b) The detection electrode is broken inside the

insulator (if only the insulator is broken does not matter)

c) The detection electrode is in short circuit with

earth

d) The input at the minimum rate is not enough

e) The PCB does not detected the flame

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 wise

direction to increase in anticlockwise direction to decrease the gas quantity during 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

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

INCONVENIENT:

The boilers does not try to make the ignition procedure because:

- The smoke thermostat has cut the circuit (only for boilers Logamax U014 - Logamax U014 K - Logamax U014 VMC - Logamax U014 K VMC)

- The H.L. thermostat has cut the circuit

After the removal of the fault’s cause press the reset button L on the control panel to restore

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

INCONVENIENTS: The smoke pressure switch did not give the permission for the burner ignition

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

a)* The chimney draught is not correct

b) The H.L. thermostat has cut in.

An over heating of the heat exchanger occurrend.

a)* The flue gas pressure switch is faulty.

b)* The silicon pipes are disconnected or bro-

ken.

c)* There is insufficient combustion air suction

or flue gas discharge.

d)* The fan does not work.

e)* The PCB is faulty

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

a) Check the chimney and the combustion air

intake 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 or

replace if necessary.

d) Replace the fan.

e) Replace the electronic PCB

Service info

BOILERS STATUS

The boilers is in permanent lock-out. The red light G is off

INCONVENIENT: The heating sensor detects a temperature higher than 81°C

The reset is automatically done after the removal of the fault’s cause.

The boiler is in permanent lock-out. The red light G is off

INCONVENIENTS:

a) - The heating sensor detects a temperatur lower than 2°C

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

c) - The PCB does not detected the presence of either or both temperature sensor

d) - e) - f) The minimum water pressure switch does not give the burner the permission to ignite.

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

INCONVENIENT:

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

POSSIBLE CAUSES

a) Water does not circulate in the heating sy-

stem. Pipes are blocked, the thermostatic valves are closed or the system gate valves are closed.

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 the

C.H. system (2.10.2)

e) The minimum water pressure switch is

disconnected.

f) The The minimum water switch is faulty.

a) There are insufficient pressure or flow rate in

the D.H.W. system.

b) The flow switch sensor is disconnected or

faulty.

c) The flow switch is disconnected.

d) The flow switch is faulty.

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.

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

WARNING The adjustments of the pot. meter 1-2-3 are

THIS ADJUSTEMENTS MUST BE CARRIED OUT SOLELY BY TRAINED TECHNICIANS

The uncontrolled adjustment of the pot. meter can jeopardize the correct operation of the boiler

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

carried out by the constructor.

1. Adjustment of maximum output in heating mode

It allows to adapt the boiler output to the actual C.H. needs by adjusting the burner pressure:

By rotating the trimmer 1 clockwise the pressure increases; By rotating anticlockwise the pressure decreases.

2. Adjustment of the modulation current

Allows to adjust the minimum gas pressure

3. Adjustment of the soft light

Allows to adjust the burner pressure at the ignition time.

2.10 FAILURE CODES

Service info

In case of failure the burner is automatically switched off, and the cobination 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 failures are detected at the same time, the code of the highest priority one is 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 smoke thermostat cut-off or loss of flame signal.

2.10.2 - LACK OF WATER (priority 6)

Description: Insufficient water pressure: intervention of minimum water pressure switch.

2.10.3 - IGNITION FAILURE (priority 5)

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

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

LED

CH MODE (E) FLAME (F) LOCKOUT (G)

LED

CH MODE (E) FLAME (F) LOCKOUT (G)

LED

CH MODE (E) FLAME (F) LOCKOUT (G)

Status

OFF OFF ON

Status

OFF OFF BLINK

Status

OFF BLINK ON

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 detected 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.

EF G

EFG

CH MODE (E) FLAME (F) LOCKOUT (G)

LED

Status

OFF ON ON

Status

ON OFF BLINK

Status

BLINK OFF BLINK

Status

BLINK BLINK BLINK

Service info

USERS' INSTRUCTION

3.1 - CONTROL PANEL

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

IV E N

MIN

MAX

DACE

F G

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

MAXMIN

H L

MIN

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

rature control

C = D.H.W. temperature control (+ Antifrost

protection

ON / OFF switch (A)

- With the switch in the I position the electrical supply is ON

- With the switch in the 0 position the electrical supply is OFF

Summer/Winter switch + C.H. temperature control (B)

MIN

You can select which mode to use by turning this knob.

MAX

If the knob is in the following position – – it indicates that the boiler is working only for do-

MIN

MAX

E F

IV E N

MAX

G H

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

mestic hot water production and that the temperature can be adjusted turning knob ''C''.

If the knob is set within the range indicated by the arrow on

MIN

the illustration it means that the boiler always gives priority to the production of domestic hot

MAX

water (if it is requested) and controls the temperature of the water of the heating circuit from a minimum of 45°C to a maximum of 78°C.

fig. 35

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

D.H.W. temperature control (C) (Only for IVEN CTN/ CTFS)

If the knob is set within the

MIN

range indicated by the arrow

MAX

on the illustration it means is possibile to adjust the domestic hot water temperature. The temperature can be controlled from a minimum of 35°C to a maximum of 57°C.

Service info

D.H.W. temperature control (C) + No Frost (Only for IVEN

MIN

RTN / RTFS when combined with an external D.H.W. tank)

If the knob is set within the

MAX

range indicated by the arrow on the illustration it means is possibile to adjust the D.H.W. temperature from a minimum of 25°C to a maximum of 57°C.

The reference to the knob in the position points out that the boiler's sanitary circuit is not in operation (in that case there is no production D.H.W.). If in the mean time the B knob is in the position the antifreeze protection of an external D.H.W. tank is activated.

ting request. If at the same time there is a request for domestic hot water the lamp switches off.

Burner ON lamp (Green) (F)

When this lamp is illuminated it indicates that the burner is on, both for central heating or for domestic hot water production.

Burner lockout warning lamp (G)

The function of this lamp is to signal that the burner’s control is in lockout 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 does not fire, it will be necessary to verify if the gas gate valve is

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

Chimney-sweeper push button (H)

This button allows the starting of chimney-sweepers function, that is to say that the boiler works at maximum power (or at minimum power) in order to allow adjustment’s operations and combustion's tests. By pushing one time the button, the boiler works at maximum output. ( )

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

open.

MIN

when a D.H.W. storage tank is not fitted, the knob (C)

Note: for IVEN RTN/RTFS

must be positioned and

MAX

must stay onto the symbol

In the second case due to a lack of circulation or to an excessive scaling deposit in the heat exchanger the H.L. thermostat could shut down the boiler at 95°C.

To go back to the boiler normal operation switch OFF and ON the boiler via the A switch.

Power ON lamp (Green) (D)

When this lamp is illuminated it indicates that the boiler is connected to the mains supply.

CH request lamp (Green) (E)

If this lamp is illuminated it indicates that there is a hea-

3.2 SWITCHING ON / OFF

SWITCHING ON

MIN

MAX

For the operation of the boiler in the WINTER mode the knob ''B'' reference must be positioned within the range indicated by the arrow on the figure shown above. The limit of the arrow corresponds to the minimum and maximum temperature values of 45°C and 78°C.

Reset Button (L)

In the first case, which we previously described, in order to relight the boiler it will be necessary to press the button (L) using a nail or something like that. In the second case, before pressing the button (L), it will be necessary to wait for the tempera-

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

MIN

MAX

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

D.H.W. temperature adjustment range for the models:

IVEN 04 CTN/CTFS

MIN

SWITCHING OFF

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

MAX

D.H.W. temperature adjustment range for the models:

IVEN 04 RTN/RTFS

when conbined with an external D.H.W. tank.

MAX

Shut off the gas cock upstream the boiler in case a prolonged inactivity period of the same is expected.

Service info

3.3 ANTI FROST PROTECTION

MIN

MAX

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

MIN

MAX

3.4 IMPORTANT SUGGESTION AND NOTES

The boiler must be serviced once a year by qualified personnel.

Correct maintenance allows the boiler to work optimally, respecting the environment and without endangering people, animals and property.

Only qualified and technical personnel can make adjustment onto the gas valve.

No-one, including qualified personnel, is authorized to make modifications to the boiler.

Check regularly the pressure of the boiler water through the pressure gauge fitted onto the panel board, and restore it, if necessary.

If some fault appears during the operation, the boiler is automatically put in lockout position and the red warning lamp (G) lights. In this case proceed as follows:

- Ascertain that the gas cock is open and that

there is gas in the gas pipe (try to ignite a gas cooker)

- If so, wait one minute before resetting the

boiler by depressing the L push button. If the boiler does not start and goes into lockout position after three times, ask for a service or for a qualified technician.

If the boiler goes into lockout position frequently, indication of a repeatetive fault in the operation, ask for a service or for a qualified technician

WARNING In case an open flue boiler (TN) the burner lockout can be due to the intervention of the smoke thermostat (antispillage thermostat). In

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

WARNING!

This anti-freezing protection does not work when the boiler is disconnected from the electrical supply and/or the gas is closed.

This system protects the boiler and the eventual DHW tank from the freezing, but it does not protect the C.H. and sanitary circuits. Moreover special anti-freeze products suitable for the multimetal installations can effectively protect the heating system from the freeze.

Do not use the anti-freeze products for car's engines because they can damage the wa-

this case to restart the boiler it is necessary to depress the reset push button L. This fault, if repeated in the time, means of a bad chimney operation. Ask a qualified technician for a check.

If the boiler remains inactive and disconnected from the power supply for long periods it may be necessary to unlock the pump.

This operation, which entails disassembling the outside casing and working on internal parts of the boiler, must be performed by qualified personnel.

It is possible to prevent the pump from blocking by adding special filming products suitable for multi-metal systems to the water.

If the boiler is not disconnected from the mains power supply the pump will not block because the boiler’s PCB has an anti-jamming programme. In this case the pump goes into operation for a 5 seconds after 24 hour of inactivity.

The boiler has a temperature and pressure gauge which allows you to check the temperature and pressure of the water in the heating system.

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

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

WARNING

After adjusting the pressure, close the tap without over-tightening

it. If the tap is not closed properly the pressure could rise, resulting in the safety valve opening and the water leaking.

ter sealing gaskets.

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

When the temperature detected by the heating sensor is under 2 °C, the boiler's operation is automatically inhibited until the temperature raises again to 5 °C. To ascertain that the heat exchanger is not frozen, open the warm water taps. When you get water (cold too), you can suppose that the exchanger is not frozen. On the contrary, when you get no water, the exchanger is frozen. In that case it is necessary to apply to a service technician which. will work to thaw the heat exchanger using a hair dryer.

WARNING

The anti-frost protection is operational only if the boiler is con-

nected to the mains supply and the gas cock is open

Information for the user The user can access only the parts of the boiler which can be reached without the need for tools and/or implements: it is therefore forbidden to disassemble the outer casing of the boiler and tamper with the interior parts.

AG S.P.A.

46033 casteldario - mantova - italia - tel. 0376/57001 (r.a.) - telefax 0376/660556

La Unical declina ogni responsabilità per le possibili inesattezze se dovute ad errori di trascrizione o di stampa. Si riserva altresì il diritto di apportare ai propri prodotti quelle modifiche che riterrà necessarie o utili, senza pregiudicarne le caratteristiche essenziali.

Unical RTN 24, RTFS 24, RTFS 28, CTN 24 F, CTFS 24 F Installation, Use And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual