Unical EVE 05 Quick start guide

EVE 05
CTFS 26 F
00333590 - 1st edition - 08/2010
INSTALLATION USE
AND MAINTENANCE
English

2
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 correspond 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.
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 14°f 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.

3
Users easy guide
REMEMBER:
• Periodically check the water pressure into the boiler.
• Ascertain to be able to turn OFF the appliance in case of emergency (power, gas and water
supply).
• Make sure to be familiar with the switching ON and OFF and with the temperature adjusting
knobs.
• The user is not allowed to remove the casing and get access to the internal parts of the boiler.
• Don’t hang dresses, …..etc. to the boiler.
• Don’tforgettoplantheannualmaintenance
INFORMATION FOR YOUR SAFETY
• GAS LEAK
Don’t switch on the appliance if there is a suspicion of gas leak.
Contact IMMEDIATELYthe technical personnel.
DON’T SEEK GAS LEAKS WITH NAKED FLAMES!!
• LACK OF WATER
If the pressure decreases repeatedly below the minimum operational pressure it means that
there is a lack of water in the heating circuit. Contact the technical personnel for an
inspection to the system.
°C
Toputagainthe boilerin operation,itwill beneces-
sary to press the button.
In case the boiler goes frequently into lockout po-
sition,contact the service technician.
Reset
push
button
Display
• LOCKOUT
The function of this symbol is to indicate that the burner is in lockout position, due to a lack
of gas (check if the gas cock is open) or to a non detected ignition.

4
Users easy guide
Reset
push button Central heating
temperature adjusting
knob
Domestic Hot Water
temperature adjusting
knob
Manometer
CONTROLS
HOW TO START THE BOILER
- Swicth ON the boiler through the external switch.
- Check if a room thermostat or a chronothermostat is fitted and set it on heat request.
MAX
M
I
N
MAXMIN
Set the Central
Heating tempera-
ture knob into the
range shown in
the figure
Set the Domestic
Hot Water tempera-
ture knob into the
range shown in the
figure
By adjusting the Domestic Hot Water
temperature to the real required tem-
perature, you will avoid to mix hot wa-
ter with cold water, in this way reduc-
ingboththeboileroperationcostsand
the scaling formation.
Winter operation
(CentralHeating + Domestic Hot Water)
Summer operation
(DomesticHot Wateronly)
MAX
M
I
N
Set the Central
Heating tempera-
ture knob to the
symbol
MAXMIN
Set the Domestic
Hot Water tempera-
ture knob into the
range shown in the
figure
°C
°C
The display indicates that the boiler
is in Central Heating mode and the
flow temperature is 63°C.
The display indicates that the boiler
is in Domestic Hot Water mode and
the water temperature is 38°C.
HOW TO ADJUST THE BOILER
MAX
M
I
N
MAXMIN
°C
®
MAX MAXMIN
M
I
N
EVE
05
Display

5
Users easy guide
HOW TO SET THE WATER PRESSURE INTO THE SYSTEM
The water pressure into the system has to be checked periodically, in order to be sure of the boiler
correct operation. The manometer arrow has to be above 0.8/1 bar when the boiler is switched off
or in stand-by position. The boiler lock-out due to lack of water is displayed with the failure code
(low Pressure). In order to see this code, once the boiler is in lock-out and the symbol
appears, push the reset push-button.
Inorder toincrease thewaterpressure intothesystem, openthe filling valve(black) undertheboiler;
when the pressure indicated on the manometer is between 0.8 and 1 bar, close the filling valve.
CLEANING
For the simple cleaning use a dry cloth. To remove hard blots, clean with a wet cloth and wipe with
a dry cloth. DO NOT USE abrasive products.
ANTIFROST PROTECTION
The boiler is equipped with an antifrost system that operates au-
tomatically when the boiler water temperature decreases under
6°C:the burnerandthe pump areautomatically put intooperation
until the Central Heating system water temperature reaches
16°C.This protection is active only if the boiler is electrically
feeded.
BC
MAX
M
I
N
MAXMIN
HOW TO SWITCH-OFF THE BOILER
For short periods: Rotate the knob “B” in position
For long periods: Cut off the electrical and gas supply.
°C
Position during
water pressure
setting
Standard posi-
tion during
operation
Set the Central Heating and
Domestic Hot Water temperature
knobs to the symbol shown in the
figure.

6
General info
DATA PLATE
LEGEND:
1 = CE Surveillance notify body
2=Boiler type
3=Boiler model
4=Number of stars (Directive 92/42/CEE)
5=(S.N°) Serial number
6=P.I.N. code
7=Approved fluing configurations
8=(N0x) N0x class
A = Central Heating circuit features
9=(Pn) Nominal output
10 = (Pcond) Condensing nominal output
11 = (Qmax) Nominal heat input
12 = (Adjusted Qn)Adjusted for nominal Heat input
13 = (PMS) Max. pressure C.H. system
14 = (T max) Max. C.H. temperature
B = Domestic Hot Water circuit features
15 = (Qnw) Nominal heat input in D.H.W. mode (if different from Qn)
16 = (D) Specific D.H.W. flow rate according to EN 625 - EN 13203-1
17 = (R factor) N° taps based on the quantity of water declared EN
13203-1
18 = (F factor) N°stars based on the quality of water declared
EN 13203-1
19 = (PMW) Max. pressure D.H.W. system
20 = (T max) Max. temperature D.H.W system
C = Electrical features
21 = Electrical power supply
22 = Consumption
23 = Protection grade
D = Countries of destination
24 = Direct and indirect country of destination
25 = Gasfamily
26 = Supply pressure
E = Factory setting
27 = Adjusted for gas type X
28 = Space for national brands
CEMarking
- TheCEmarkingdocumentsthattheboilerssatisfy:
- TheessentialrequirementsoftheDirectiveregardinggasappliances(Directive
90/396/CEE)
- TheessentialrequirementsoftheDirectiveregardingelectromagneticcompatibility
(Directive89/336/CEE)
- TheessentialrequirementsoftheEfficiencyDirective(Directive92/42/CEE)
- TheessentialrequirementsofthelowvoltageDirective(Directive73/23/CEE)
®
1
2
3
5
7 8
6
4
9
11
13
10
12
14
15
17
19
16
18
20
28
A
B
21 22
23
24 25 26
27
C D
E

7
General info
1
2
3
For your own safety, observe these safety instructions.:
PLEASENOTE:
User tip for the optimum utilisation and
setting of the control(s) plus useful
information.
WARNING
from risk of electric shock.
WARNING
Identifies potentially dangerous situa-
tions.
User easy guide ................................................................ pag. 4-6
TECHNICAL FEATURES
AND DIMENSIONS ......................................................... pag. 8
1.1 Technical features .................................................................. pag. 8
1.2 Dimensions ............................................................................. pag. 8
1.3 Hydraulic circuits ................................................................... pag. 9
1.4 Technical data ........................................................................ pag. 10
1.5 Main characteristics .............................................................. pag. 10
DIRECTIONS FOR
INSTALLERS ....................................................................... pag. 11
2.1 Installations rules ................................................................... pag. 11
2.2 Installation ............................................................................... pag. 11
2.2.1 Packing ...................................................................... pag. 11
2.2.2 Positioning the boiler .................................................. pag. 12
2.2.3 Assembling the boiler ................................................ pag. 13
2.2.4 Ventilation ................................................................... pag. 13
2.2.5 Discharge and suction pipe configuration ............... pag. 14
2.2.6 Positioning of terminals for type C boilers ............... pag. 15
2.2.7 Smoke evacuation Ø80 air suction flange .............. pag. 17
2.2.8 Discharge of flue gas into coaxial ducts with a
diameter of 100/60 mm (Type A accessories) ....... pag. 18
2.2.9 Flue gas discharge and air suction with separate
pipes with 80 mm diameter ....................................... pag. 18
2.2.10 Measurements of combustion efficiency ................ pag. 20
2.2.11 Connection to the gas mains.................................... pag. 21
2.2.12 Hydraulic connection ................................................ pag. 21
2.2.13 Electrical connection ................................................. pag. 22
2.2.14 Jumper location ......................................................... pag. 22
2.3 Wiring diagram ........................................................................ pag. 23
2.3.1 Pratical connection diagram ..................................... pag. 23
2.4 Filling the system ................................................................... pag. 24
2.5 Starting the boiler ................................................................... pag. 24
2.6 Adjusting the burner ............................................................... pag. 25
2.7 Modification of other gases ................................................... pag. 26
2.8 Failure code ............................................................................ pag. 27
USERS' INSTRUCTION.............................................. pag. 29
3.1 Control panel .......................................................................... pag. 29
3.2 Switching on/off ...................................................................... pag. 30
3.3 Antifrost protection ................................................................. pag. 31
3.4 Important suggestion and notes ........................................... pag. 31
GAS VALVE LABEL
00331980
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, te-
flon strip or similar materials

8
Installation info
1TECHNICAL FEATURES AND DIMENSIONS
1.1 -TECHNICAL FEATURES
EVE 05 CTFS 26 F is a wall hung gas boiler
with built-in atmospheric gas burner, with 26
kW output, instantaneous D.H.W. produc-
tion; forced draught room sealed combustion
chamber and electronic ignition.
EVE 05 CTFS 26 F forced draught room se-
aled boiler with electronic ignition and instan-
taneous D.H.W production with DHW plates
heat exchanger
EVE 05 is supplied with all control and safety
devices according to the latest laws in for-
ce.
The main technical features of the EVE 05
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;
•Safety pressure switch for low water level;
•Priority flow switch for D.H.W.;
•Tap water flow rate restrictor
•Control panel with IP X4D insulation pro-
tection
•Manometer;
fig. 1
1.2 - DIMENSIONS
420
700
123 87 120 90
152
85
107
43 56 60 70 61131
CFGRM
Rc
V
s
Si
M C.H. system flow
C D.H.W. outlet
G Gas inlet
F D.C.W. inlet
R C.H. system return
Rc Filling valve
VS Heating circuit safety valve
Si Boiler drain cock
view from above
view from below
310
•Warning light for: presence of power, re-
quest for heating, burner in operation, lock
out, by the display
•D.H.W. temperature selector (35/57°C)
•C.H. temperature selector (45/78°C) +
summer/winter position.
•Reset push button / Chimney sweeper
button / Error codes visualization / Ther-
mometer
•Paper mounting jig for connections pre-
disposition
•Mounting jig opt.

9
Installation info
fig. 2
EVE 05 CTFS 26 F
1
3
4
2
5
6
7
8
9
10
11
12
13
CF G
14
15
16
17
18
19
20
21
22
23 RM
1.3 - HYDRAULIC CIRCUIT
1 Flow switch - Cold water filter
2 D.H.W. flow restrictor
3 Gas valve
4 D.H.W. temperature sensor
5 Burner nozzles
6 Ionisation/Ignition electrode
7 Burner
8 Bithermal heat exchanger
9 H.L. thermostat
10 Flue gas extractor fan
11 Air/flue coaxial duct
12 Micro-switch on flue gas pressure
switch
13 Flue gas pressure switch
14 Expansion vessel inflating valve
15 Expansion vessel
16 Automatic air vent
17 Circulating pump
18 C.H. temperature sensor
19 Minimum water pressure switch
20 By-pass (unadjustable)
21 Boiler drain cock
22 Heating circuit safety valve
23 Filling valve
C D.H.W. outlet
F D.C.W. inlet
G Gas inlet
R C.H. system return
M C.H. system flow

10
General info
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
kg
kW
kW
%
%
%
%
n.
%
%
%
°C
g/s
%
%
mg/kWh
%
%
CTFS 26 F
26,07
10,14
93,09
92,83
91,64
90,25
3
93,67
88,88
0,72-0,58
117,1
12,98 - 13,76
36,88
3,1 - 8,3
194,5
2
11,12 - 6,33
0,345
CTFS 26 F
II2H3P
7,27
0,5
3
3,5
78
45
6
1
137,9
2,5
0,5
6
12,5
14
8,25
9,28
10,61
12,37
14,85
35 - 57
230/50
3,15 x 2
130
X4D
36,5
39,5
EVE05
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.
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)
NOXclass
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 USE
OTHERGASES.
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 (Δt 30 K)
Flow restrictor
DHW production in continuous operation with Δt 45 K
DHW production in continuous operation with Δt 40 K
DHW production in continuous operation with Δt 35 K
DHW production in continuous operation with Δt 30 K
DHW production in continuous operation with Δt 25 K*
DHW Temperature range
Electrical supply
Supply fuse
Maximun absorbed power
Insulation protection
Net weight
Gross weight
1.5 - GENERAL FEATURES
(*) mixed

11
Installation info
fig.3
2.2.1 - PACKING
EVE 05 is delivered completely assembled and
packed in a strong cardboard box. Once the
boiler has been unpacked check that it is in-
tact.
750
430
330
Keep the packaging material
(cardboard box, plastic strips,
plastic bag, etc.) out of the
reach of children as it represen-
ts a choking and suffocation
hazard.
In addition to the boiler packaging contains:
- a bag with:
- installation, use and maintenance
handbook,
- template for fixing the boiler to the wall,
A bag containing:
- 2 dowels with screws hook to fix the boiler
to the wall,
- a diaphragm for flue gas outlet
UNICAL refuses all liability
for injury to persons and ani-
mals or damage to property
resulting from non-observan-
ce of the above.
2DIRECTIONS FOR
INSTALLER
2.1 - DIRECTIONS FOR
INSTALLER
EVE 05 is a gas boiler which must be instal-
led in accordance with the latest regulations
or rules in force. For the boiler category,
which changes according to the destination
country, see page 6.
NOTE:
Observethe correspondingtechnical rulesand
thebuilding supervisory andstatutory
regulations of the country of final use when
installing and operating the system.
Alwaysensurethat anappropriatelyspecialised
company is entrusted with installation, gas
supplyandfluegasconnection, commissioning
and power supply connection, as well as all
servicingand repairwork.
Work on gas conduits and fittings must only
becarried out bya registeredservice provider.
Thesystemmust becleanedand servicedonce
ayear.Thisincludesan inspectionof theentire
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
unauthorisedadjustment ormanipulationof the
system’scontrolor regulating devices.
2.2 - INSTALLATION
- 2 sealed room closing covers + 2 sealing
gaskets and the fixing screws. “

12
Installation info
fig. 4
2.2.2 - POSITIONING THE BOILER
Every boiler is supplied with special “MOUNT-
ING 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 ope-
rations.
- Leave a 200 mm free space under the boi-
ler in order to allow the possible verifica-
tion or substitution of the DHW plates heat
exchanger.
- 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 si-
gnificantly shortened.
M= C.H. system
flow
C= D.H.W.
outlet
G= Gas
F= Cold water
inlet
R= C.H. system
return
Vs = Safety valve
discharge
Si = Boiler drain cock
ØLmm
= 3/4'' 107
= 1/2'' 107
= 3/4'' 107
= 1/2'' 107
= 3/4'' 107
= 143
=60
Since the temperature of the
wall on which the boiler is in-
stalled and the temperature on
the surface of the coaxial duct
do not increase, in normal operating condi-
tions, 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.
87 120
78.5
110
139 182
CF G R M
10
56 60 51 79 70
752
00332145
143
34
14.5
420
CONNECTION POSITION SEEN FROM BELOW
MOUNTING JIG FOR BOILER CONNECTIONS 00332145
107
290
CFGRM
Rc Vs
Si
143
60
360 60
130

13
Installation info
2.2.3 - ASSEMBLING THE BOILER
Before connecting the boiler to the D.H.W.
and heating system pipes, carefully clean
the pipes to remove all traces of metal re-
sulting from processing and welding opera-
tions as well as any oil and grease which
could damage the boiler 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 in-
sert the dovels;
- position the junction points for the con-
nect-ion of the gas supply pipe, cold wa-
ter supply pipe, D.H.W. outlet, CH flow
and return in the positions shown by the
Do not use solvents which
could damage the
components.
Unical refuses all liability for
injury to persons and animals
or damage to property resul-
ting from non-observance of
the above.
template. ;
- fit the boiler onto the support hooks;
- connect the boiler to the gas pipe,
domestic cold and hot water pipes, CH
flow and return pipes.
- connect to electrical supply
2.2.4 - VENTILATION
The boiler must be installed in a suitable room
according to the rules in force and particu-
larly:
FORCED DRAUGHT ROOM SEALED BOI-
LER
(TYPE C12 - C32 - C42 - C52 - C62 - C82)
The EVE 05 CTFS 24 F - EVE 05 RTFS 24 -
EVE 05 CTFS 24 are forced draught, room
seal-ed boilers; so they do not need particu-
lar ventilation openings for the combustion
air, in the room in which they are installed.
FORCED DRAUGHT, OPEN FLUE BOILER
(TYPE B22)
If the EVE 05 CTFS 26 F is installed in a room
according to the chimney configuration on
type B22, the same ventilation requirements
established in paragraphs Direct ventila-
tion and Indirect ventilation apply.
Direct ventilation:
- The room has to have a ventilation open-
ing 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 re-
ducing its usefull ventilation section.
- A correct ventilation can be optained also
through the addition of more openings,
provided the addition of the different sec-
tions is not less than that really needed.
- In case it is not possible to make a venti-
lation 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, other-
wise 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 venti-
lation opening has to be the properly si-
zed.
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, suc-
ting 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..)

14
Installation info
2.2.5 -SMOKE DISCARGE AND
AIR SUCTION DUCT
CONFIGURATION
C12, C32, C42, C52, C62,
C82 - B22
type
C12
type
C32
type
C52
type C82
type
C62
type
C42
SEPARATE
type B22
C12 Boiler designed for connection to ho-
rizontal 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 be at least
250 mm and both end sections must
be
located within a 500 mm square.
C32 Boiler designed for connection to ver-
tical discharge and suction outlets di-
rectly into the atmosphere using coa-
xial or dual ducts. The distance betwe-
en the air intake duct and the flue gas
outlet duct must be at least 250 mm
and both end sections must be loca-
ted within a 500 mm square.
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 provi-
sions.
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 loca-
ted 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 in-
dividual or shared chimney.
The chimney must comply with
relevant applicable law provi-
sions.
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 re-
quirements used for the open type boi-
lers.

15
Installation info
fig. 5
Pursuant to the directives of regulations in
force, discharge of forced draught boilers can
2.2.6 - 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

16
Installation info
fig.6
fig. 7
Diaphragm
Ø 42 mm
Fitting of the diaphragm Ø 42
2.2.7 - 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 42 mm dia. supplied with the boiler in
the plastic bag, into the fan outlet adap-
tor (see fig. 6).
The maximum allowed length for a smo-
ke pipe of 80 mm dia. is 20 m, included
a wide radium curve and one smoke ter-
minal.
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.
WARNING:
For the installation where there
is a freezing risk it is suggested
to insulate the smoke duct 80
mm dia. on all its length, both in
case it discharges from a verti-
cal wall or in a chimney.
WARNING: For the smoke ou-
tlet configuration (see fig.
6-7) it is necessary to clo-
se the holes of air entry ''1-
2'' with the provided for
closing covers and the
gaskets delivered with the
boiler.
Closing cover with
gasket in
neoprene
Closing cover with
gasket in
neoprene
Closing cover with
gasket in
neoprene
Closing cover with
gasket in
neoprene

17
Installation info
fig. 8
fig. 16
Ø 80/125
Ø 80/125
Ø 60/100
Ø 80/125
Rubber foam gasket
Up to 2 m
Up to 1 m
Up to 2,5 m
Rubber foam
gasket Diaphragm Ø 42
Diaphragm
Ø 42
2.2.8 - DISCHARGE OF FLUE
GAS INTO
COAXIAL DUCTS
Ø 100/60 mm
Type C12 Ø 100/60 mm
The minimum length of horizontal coaxial
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.
Type C32 100/60 mm
The minimum length of vertical coaxial ducts
is 0.5 metres.The maximum allowable length
of vertical coaxial ducts is 4 metres exclu-
ding the stack (Ø 80/125); for each additional
bend the maximum allowable length must be
reduced by 1 metre.
The diaphragm Ø 42 supplied with the boi-
ler must be inserted in the flue gas exhaust
pipe as shown in figure 8, for installa-
tions 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 Ø 80 / 125
The minimum length of vertical coaxial ducts
is 1,2 metres.The maximum allowable length
of vertical coaxial ducts is 6 metres exclu-
ding the stack (Ø 80/125); for each additional
bend the maximum allowable length must be
reduced by 1 metre.
The diaphragm Ø 42 supplied with the boi-
ler must be inserted in the flue gas exhaust
pipe, as shown in figure 9, for installa-
tions with a coaxial pipe up to 2,5 m.
Fitting of the diaphragm Ø 42
Closing cover
with gasket in
neoprene
Closing cover
with gasket in
neoprene
Closing cover
with gasket in
neoprene
Closing cover
with gasket in
neoprene
WARNING: For the smoke ou-
tlet configuration (see fig.
8-9) it is necessary to clo-
se the holes of air entry ''1-
2'' with the provided for
closing covers and the
gaskets delivered with the
boiler.

18
Installation info
fig. 10
152
100
95
Up to ΔΔ
ΔΔ
ΔP = 20 Pa
Rubber foam
gasket
Diaphragm
Ø 42
fig. 11
It is not allowed to position the 2 termi-
nals in opposite walls, see configuration
type C52.
DIMENSIONS FOR CONNECTION TO COAXIAL FLUE GAS DUCTS
2.2.9 - 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 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. 11).
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.
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 indicated by the failure led
lighting on the display; by pressing the
reset push-button the failure code “AF” is di-
splayed and the boiler will repeat it's ignition
sequence. If the reset button is not pressed
the boiler will in any case repeat it's ignition
sequence after 10 minutes.
WARNING: Per For the smo-
ke outlet configuration (see
fig. 11) it is necessary to clo-
se the hole of air entry ''1''
with the provided for closing
Closing cover
with gasket in
neoprene
cover and the gasket delivered with
the boiler. Note: in case the air aspira-
tion will be effected by the hole ''1'',
close the hole ''2''.

19
Installation info
fig. 12
fig. 13
DIMENSIONS FOR CONNECTION THE AIR INTAKE AND THE FLUE GAS DISCHARGE WITH DUAL DUCTS
_
>500
Hmin. = 150 mm
CONFIGURATIONS FOR SEPARATE
PIPES (SUCTION AND OUTLET) Ø 80
Example N.1
Primary air suction from perimeter wall and
flue gas discharge on roof.
Maximum allowable pressure loss:
50 Pa
87 120 152
Ø 80
123 90
Example N.1

20
Installation info
fig. 15
fig. 14
135
45
C
2
1
250 min.
Example of check using wide radius
bends:
- 17 mt duct Ø 80 x 2 = 34 Pa
- 2x90° Ø 80 long radius bends 2x4 = 8 Pa
- horizontal Ø 80 air inlet terminal = 3 Pa
- horizontal Ø 80 terminal = 5 Pa
Tot. pressure loss = 50 Pa
1
2
A
Air
inlet
1
Smoke
outlet
B
2
Example N.2
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 4 Pa;
- for each 90° Ø 80 (R=½ D) bend with
short radius, the pressure loss is 14 Pa
- 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;
NB: These values refer to dis-
charges through original UNI-
CAL non-flexible and smooth
ducts.
Example N.2
Primary air suction from perimeter wall and
flue gas discharge from the same outside pe-
rimeter wall.
It is not allowed to position the 2 termi-
nals in opposite walls,
Maximum allowable pressure loss:
50 Pa
2.2.10- MEASUREMENTSOF
COMBUSTION 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. 15).
- the flue gas temperature and CO2% mea-
sured in hole 1 (see fig. 15).
Make these measurements with the boi-
ler running in a steady state condition.
Air
inlet
Smoke
outlet
Analyser
probe Analyser probe
Analyser
probe
Analyser
probe