36
00331967 - 1 a edition - 02/2004 IVEN 04 UK RTN 24 - RTFS 24 - RTFS 28 CTN 24 F - CTFS 24 F - CTFS 28 F INSTALLATION USE AND MAINTENANCE
00331967 - 1a edition - 02/2004
IVEN 04
UK
RTN 24 - RTFS 24 - RTFS 28
CTN 24 F - CTFS 24 F - CTFS 28 F
INSTALLATION USE
AND 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 info
DATA 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. 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
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
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
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TranslationWhile 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
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.
WARNING
from risk of electric shock.
WARNING
Identifies potentially dangerous
situations.
TECHNICAL FEATURESAND DIMENSIONS .......................................................... pag. 51.1 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 FORINSTALLERS ......................................................................... pag. 92.1 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
USERS' INSTRUCTION ............................................... pag. 323.1 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
5
Installation info
1 TECHNICAL FEATURES AND DIMENSIONS
fig. 1
1.2 - DIMENSION
A
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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 04 series are the following:
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 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 heating
only;
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 heating
only;
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 protec-
tion
• 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) forIVEN 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 info
1.3 - 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
10
14
15
17
4
7
19
18
20
3
1
2
21
9
11
16
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3
19
4
7
6
8
9
13
14
15
18
16
17
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 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
7
General info
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fig. 5
IVEN 04 RTFS 24 - IVEN 04 RTFS 28
fig. 4
183
6
5
7
8
11
1213
14
15
16
4
19
10
9
9 10
4
3
6
7
8 11
12
13
14
15
16
5
17
20
11
15
1
2
1
2
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 switch
3 Expansion vessel
4 Gas valve
5 Burner nozzles6 Expansion vessel filling valve7 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 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 to
avoid condensation phenomena.
l/min
bar
bar
l
°C
°C
l
bar
l
l
bar
bar
l/min.
l/min.
l/min.
l/min.
l/min.
l/min.
l/min.
°C
V-Hz
A (F)
W
IP
kg
kW
kW
%
%
%
%
n.
%
%
%
°C
g/s
%
%
mg/kWh
%
%
RTN 2423,8810,0790,1189,7688,5387,3292,690,22,6 - 2,591,818-20113,82,4-5,319729,8 - 7,40,486
RTFS 2423,949,9590,3489,7688,6087,14293,387,91,88-2,96112,513,64-14,3867,73,0-7,4157212,1-6,70,295
CTN 24 F23,8810,0790,1189,7688,5387,3292,690,22,6 - 2,591,818-20113,82,4-5,319729,8 - 7,40,486
CTFS 24 F23,949,9590,3489,7688,6087,14293,387,91,88-2,96112,513,64-14,3867,73,0-7,4157212,1-6,70,295
RTFS 2827,459,8090,0189,8887,4387,32293,286,81,76-3,1987,717,5-17,660,862,65-7,9163213,2-6,80,256
RTN 24 II2H3+7,20,533,5814581183,9----------
230/50470X4D37
CTN 24 F II2H3+7,20,533,5814581183,92,50,5611,5107,68,69,7811,413,6935 - 57230/50470X4D37
CTFS 24 F II2H3+7,370,533,5814581183,92,50,5611,5107,68,589,8011,4413,7335 - 57230/504130X4D37
RTFS 24 II2H3+7,370,533,5814581183,9-----------230/504130X4D37
RTFS 28 II2H3+7,020,533,5814581183,9-----------230/504130X4D37
IVEN 04
CTFS 28 F II2H3+7,020,533,5814581183,92,50,5612,5128,749,8411,2413,1115,74 35 - 57230/504130X4D37
CTFS 28 F27,459,8090,0189,8887,4387,32293,286,81,76-3,1987,717,5-17,660,862,65-7,9163213,2-6,80,256
1.4 - OPERATING DATA
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
CO2
NOX (value according EN 297/A3 + EN 483)
NOX class
Flue 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 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
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 that
it is intact.
2DIRECTIONS FORINSTALLER
2.1 - DIRECTIONS FOR
INSTALLER
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 represents
a 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 animals
or 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 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 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 in
use (cookers which produce greasy ste-
am, 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 si-
gnificantly shortened.
LM = C.H. system
flow
C = D.H.W.outlet
G = Gas
F = Cold waterinlet
R = C.H. system
return
S = Safety valvedischarge
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 wall
on which the boiler is installed
and 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, more
than 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 and
the pipe in the case of inflammable walls and
wall crossings.
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85 85
11
Installation info
2.2.3 - 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 RTN
24, are open flue boilers and are foreseen forchimney connection: the air for combustion is
taken 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 than
100 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 length
more 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 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 co-
oling 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 di-
verter; 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
- In case it is not possible to make a venti-
lation opening close to the floor, it will benecessary to increase its usefull section
of 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 wall
exhauster) the section of the ventilation
opening 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 fire
danger (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 are
forced draught, room sealed boilers; so they
do 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 are
installed in a room according to the chimney
configuration on type B22, the same ventila-tion requirements established in paragraphs
Direct 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
Ø
Pendenzamin. 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 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 RTN24, there must be no more than 2 directionchanges;
- 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 buil-
ding must be sealed and the part facing
outwards must be open;
- the final section, on which the draught ter-
minal 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 con-
nection to the boiler by at least 1.5 m (see
fig. 8).
DIMENSIONALS FOR CONNECTING FLUE GAS DUCTWARNING:
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 thermo-
stat 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 thermo-stat.
If the boiler cuts off regularly, itis 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 fordamage caused as a result of in-
correct installation, use, modifica-
tion of the boilers or for non-observance of
the instructions provided by the manufacturer
or 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 terminals
directly into the atmosphere
using coaxial or dual ducts. The distan-
ce between the air intake duct and the
flue gas outlet duct must be 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 distan-
ce between the air intake duct and the
flue gas outlet duct must be at least
250 mm and both end sections must
be 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 exhaust
of 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 product
exhaust ducts.
These ducts can discharge into are-
as 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 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, 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 re-
quirements used for the open type boi-
lers.
Note: type B22
is not approved by
Turkish market.
14
Installation info
fig. 10
Pursuant to the directives of regulations in
force, discharge of forced draught boilers can
2.2.7 - POSITIONING OF TERMINALS FOR TYPE ‘’C’’BOILERS
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:
POSITIONING OF TERMINALS FOR "FORCED DRAUGHT" BOILERS
Min.
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
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
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, 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.fig. 11
fig. 12
DiaphragmØ 44 mm
Fitting of the diaphragm Ø44
WARNING:
For the installation where there
is a freezing risk it is dia. sug-
gested to insulate the smoke
duct 80 mm on all its length,
both in case it discharges from a vertical wall
or in a chimney.
16
Installation info
2.2.9 - DISCHARGE OF FLUEGAS INTOCOAXIAL DUCTSØ 100/60 mm
Type C12The minimum length of horizontal co-axial
ducts 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 dip
of 1% towards the outlet point to prevent rain
water from getting into the duct.
Type C32The minimum length of vertical coaxial ducts
is 0.5 metres. The maximum allowable lengthof vertical coaxial ducts is 4 metres exclu-ding 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 boi-
ler must be inserted in the flue gas exhaust
pipe as shown in figure 13, for installa-
tions with horizontal coaxial pipe up to 1
m and with vertical coaxial pipe up to 2 m.
fig. 13
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 lengthof vertical coaxial ducts is 6 metres exclu-ding the stack (Ø80/125); for each additional
bend the maximum allowable length must be
reduced by 1 metre.
The diaphragm Ø44 supplied with the boi-
ler must be inserted in the flue gas exhaust
pipe, 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, 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 insi-
de 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 ne-
cessary to foresee a convenient
insulation of such a duct. The
flue duct, during the operation
of 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
Diaphragm
Ø 44
IMPORTANT
Flue gas pressure switch operation
The boiler is fitted with a device control-ling flue gas pressure.This device shuts down the boiler in the
event of a malfunction.
This situation is not indicated by the emer-gency light.The safety device needs to be reset by
switching OFF and ON.
18
Installation info
fig. 17
fig. 18
_> 5
00
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 and
flue gas discharge on roof.
Maximum allowable pressure loss:50 Pa (IVEN 04 TFS 24)60 Pa (IVEN 04 TFS 28)
85 85
245
Ø 80
85
160
245
8585
85 85
19
Installation info
CALCULATION OF PRESSURE LOSSESFOR 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 insuction 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.
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 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.
135
45
C
Sondaanalizzatore
2
1
25
0 m
in.
Sondaanalizzatore
NB: These values refer to di-
scharges through original UNI-
CAL non-flexible and smooth
ducts.
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)
- 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
1
2 Sondaanalizzatore
Sondaanalizzatore
Fumi
Aria
A
Example N.2 (fig. 19)Primary air suction from perimeter wall and
flue 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
Sonda
analizzatore
1
Fumi
B
2
20
Installation info
2.2.12 - CONNECTION TO THE GASMAINS
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 ma-
nual.
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 cove-
red.
The seal test must be conducted using air or
nitrogen 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 that
the system be cleaned to remove any impuri-
ties 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 cir-
cuit.
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.
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 the
beginning of the test no pressure reduc-
tion is to be detected on the gas pressure
Move the control panel in the high position for
the hydraulic connection. Remove the three
screws "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.
HEATING
The heating flow and return must be connected
to 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 the
pressure losses induced by radiators, any ther-
mostatic 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 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 the
By-pass
rotate the screw
anti-clockwise
To CLOSE the
By-pass
rotate 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 make
the maintenance operations easy.
rantees always minimum flow rate throught
the heat exchanger, also in the case, for in-
stance, that all the thermostatic valves fitted
on the radiators, are closed. It is possible to
adjust 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 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.
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 connected
to the relevant ½” connections of the boiler Cand F (see fig. 7).
The hardness of the supply water affects the
frequency of the cleaning of the heat exchan-
ger.
gauge. If gas leaks have to be found, use
only 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 materials�����������
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
Ma
no
me
tric
He
ad
av
ail
ab
le in
mW
.G.
Flow rate Q (l/h)
Note: The boiler is delivered with the by-pass in OPEN position.= By-Pass CLOSED - - - - - - - - = By-Pass OPEN
Ma
no
me
tric
He
ad
av
ail
ab
le in
mW
.G.
Flow rate Q (l/h)
Ma
no
me
tric
He
ad
av
ail
ab
le in
mW
.G.
Flow rate Q (l/h)
22
Installation info
WARNINGDepending 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 treat
the water if the supply water has
a hardness value of more than
28°f.
As far as concerns the positio-
ning 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 AD.H.W. TANK (for boiler typesproviding 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 bo-
ard, and place the panel in correspondence to
the upper holes "C" and fix the panel.
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 adap-
ter, 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 pres-
sure 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 provi-
ded with the kit.
fig. 24
E
fig. 25
�
�
� �
�
�
�
�
�
�
�
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 REMOVED
1 - SAFETY VALVE
2 - NIPPLE
3 - FLOW PIPE
4 - CLOSING CAP
6 - MINIMUM PRESSURE SWITCH
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
23
Installation info
� �
2.2.15 - ELECTICAL CONNECTIONS
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 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 technician
to check the electrical system.
UNICAL disclaims all liability for damage orinjury caused by failure to earth the system
properly.
Gas, domestic water and central heatingpipes are not suitable for earthing purpo-ses.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 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 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 ex-
tractable 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.
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 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 posi-
tion (see. par 2.3.2).
For a multi-zones temperature control it is not
possible 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 9
0 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
2.3 WIRING DIAGRAM
2.3.1 ACTUAL WIRING DIAGRAM
LE
GE
ND
A
A1...A
8=
Connecto
rs
Y1
=R
oom
therm
osta
t 2
4 V
connecto
r
Y2
=E
lectr
ical s
upply
connecto
r
IG=
ON
/OF
F s
witch
TA=
Room
therm
osta
t (o
ptional)
VG
=G
as v
alv
e
E. R
IV=
Ionis
ation e
lectr
ode
E. A
CC
=Ig
nitio
n e
lectr
ode
V=
Fan (only
for T
FS
)
PV
=F
an p
ressure
sw
itch (only
for T
FS
)
TL
=H
.L. T
herm
osta
t
TF
=F
lue-g
as s
pill
age therm
osta
t
(only
for T
N)
P=
Circula
ting p
um
p
DK
=M
inim
um
wate
r pre
ssure
sw
itch
SR
=C
.H. s
ensor
FL
=R
ota
ry flo
w s
witch (only
for C
TN
-CT
FS
)
SS
=D
.H.W
. sensor (only
for C
TN
-CT
FS
)
SS
*=
D.H
.W. sensor (o
nly
for boile
r w
ith e
xte
rnal D
.H.W
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25
Installation info
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2.4 - FILLING THESYSTEM
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 che-
ck that the automatic air vent in the boiler
is works properly;
- gradually open the water tap and check
operation of any automatic air vents instal-
led 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 tempera-
ture, stop the pump and repeat the air re-
lief 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
fig. 27
2.3.2 - JUMPER LOCATION
They are placed on the modulation card and
their 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 TYPE
For modulating chronothermostat the jumper
is 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 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 pres-
sure.
This must be performed when the system is
cold. Use the temperature and pressure gau-
ge 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 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 the
protection screw and check that there are no
water leaks.
WARNINGOnce the protection screw has been removed
a little water may leak out. Before replacing
the 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 terminal
are installed correctly: when the boiler is
switched 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 are
open;
- the mains gas corresponds to that with
which the boiler has been calibrated: othe-
rwise, convert the boiler to use the gas
available (see section: “MODIFICATION
FOR OTHER GASES “): this operation
must 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 THE
BURNER
All the instructions below are for the exclusi-
ve use of qualified technicians.All the boilers leave the factory calibrated and
tested.
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 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 testnipple downstream the gas valve (fig. 30)
and connect a pressure gauge as shown
in figure 30;
- set the ''B'' knob (onto the panel board) tomax. 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 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 that
indicated in the table “NOZZLES - PRES-
SURES ”;
- correct the value, if necessary, turning the
MIN 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 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.
PRESSURE TESTNIPPLE
CLOCKWISEANTI-CLOCKWISE CLOCKWISE
ANTI-CLOCKWISECLOCKWISE
ANTI-CLOCKWISE
27
Adjustment info
fig. 32
fig. 33
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IVEN 04 CTN 24 F - IVEN 04 RTN 24
Gas
consump-
tion
max.
Natural gas
Propan
Butan
10,07 - 23,88
10,07 - 23,88
10,07 - 23,88
11,5 - 26,5
11,5 - 26,5
11,5 - 26,5
20
37
28-30
14
14
14
-
-
-
IVEN 04 CTFS 24 F - IVEN 04 RTFS 24
9,95 - 23,94
9,95 - 23,94
9,95 - 23,94
11,5 - 26,5
11,5 - 26,5
11,5 - 26,5
20
37
28-30
14
14
14
-
-
-
IVEN 04 CTFS 28 F - IVEN 04 RTFS 28
9,8 - 27,45
9,8 - 27,45
9,8 - 27,45
11,5 - 30,5
11,5 - 30,5
11,5 - 30,5
20
37
28-30
14
14
14
-
-
-
Natural gas
Propan
Butan
Natural gas
Propan
Butan
1,25
0,75
0,75
2,1
6,4
4,6
11,0
32,1
25,8
1,22 m³/h
0,89 kg/h
0,91 kg/h
2,80 m³/h
2,06 kg/h
2,09 kg/h
1,25
0,75
0,75
2,0
6,2
4,8
10,8
35,3
27,1
1,22 m³/h
0,89 kg/h
0,91 kg/h
2,80 m³/h
2,06 kg/h
2,09 kg/h
1,25
0,78
0,78
2,1
4,4
3,7
13,8
35,5
27,4
1,23 m³/h
0,89 kg/h
0,91 kg/h
3,24 m³/h
2,37 kg/h
2,40 kg/h
JP1: For nat. gas boilers, the jumper is
on NAT.
For LPG boilers, the jumper is on
LPG.
2.7 - MODIFICATION FOR
OTHER GASES
The boilers are manufactured for the type of
gas specifically required upon order.
Any subsequent conversion must be perfor-
med by qualified technicians who will use the
kits supplied by Unical and perform the con-version 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 themain 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 - PRESSU-
RES”) and adjust the pressure of the bur-
ner 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 informa-
tion 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 themain 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 - PRESSU-
RES”) and adjust the burber pressure 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 informa-
tion required and stick it onto the boiler
alongside the data plate.
Nominal
Output
(kW)
Nominal
input
(kW)
Supply
pressure
(mbar)
Ø
Diaphragme
(mm)min.
(mbar)max
(mbar)
Ø
Nozzles
(mm)
Gas
consump-
tion
min.
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 of
gasNo. of
Nozzles
Burner pressure
Gas
consump-
tion
max.
Nominal
Output
(kW)
Nominal
input
(kW)
Supply
pressure
(mbar)
Ø
Diaphragme
(mm)min.
(mbar)max
(mbar)
Ø
Nozzles
(mm)
Gas
consump-
tion
min.
Tipe of
gasNo. of
Nozzles
Burner pressure
Gas
consump-
tion
max.
Nominal
Output
(kW)
Nominal
input
(kW)
Supply
pressure
(mbar)
Ø
Diaphragme
(mm)min.
(mbar)max
(mbar)
Ø
Nozzles
(mm)
Gas
consump-
tion
min.
Tipe of
gasNo. of
Nozzles
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)
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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 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 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 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 is
using 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 burner
pressure, 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 set
the 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 happen
during 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 wise
direction 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 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
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
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 suction
or 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 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 resto-
re
The boiler is in lock-out position and the red
light 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 press
the reset button on the control panel to resto-
re
The boiler is in lock-out position and the red
light G is on.
INCONVENIENT:
The burner ignites for a few seconds andthen goes out
After the removal of the fault’s cause press
the reset button on the control panel to resto-
re
The boiler is in lock-out position and the red
light 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 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 isblinking
INCONVENIENTS: The smoke pressureswitch did not give the permission for theburner ignition
Reset from this status can be done by
swtching 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 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 currentAllows to adjust the minimum gas
pressure
THIS ADJUSTEMENTS MUSTBE CARRIED OUT SOLELY BYTRAINED TECHNICIANS
To accede to the trimmer it is necessary to
dismantle 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 softlight
Allows to adjust the burner
pressure 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 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 pressu-
re 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.
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 the
boiler goes into permanent lockout.
To reset it will be necessary to push the reset button.
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LED Status
