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EVE

RTN 24 - RTFS 24

CTN 24 F - CTFS 24 F

CTN 24 - CTFS 24

00332243 - 3

edition - 10/2010

INSTALLATION USE

AND MAINTENANCE

English

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.

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’t forget to plan the annual maintenance

INFORMATION FOR YOUR SAFETY

• GAS LEAK

Don’t switch on the appliance if there is a suspicion of gas leak.

Contact IMMEDIATELY the 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

To put again the boiler in operation, it will be neces-

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.

GAS VALVE LABEL

00331980

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

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-

ing both the boiler operation costs and

the scaling formation.

Winter operation

(Central Heating + Domestic Hot Water) for C models

(Central Heating only) for R models

Summer operation

(Domestic Hot Water only) for models C

MAX

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

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

MAXMIN

°C

MAX

MAXMIN

EVE

Display

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.

In order to increase the water pressure into the system, open the filling valve (black) under the boiler;

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 burner and the pump are automatically put into operation

until the Central Heating system water temperature reaches

16°C.This protection is active only if the boiler is electrically

feeded.

MAX

MAXMI N

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. For R version boilers only knob

B is there.

General info

DATA PLATE

LEGEND:

1 = CE Surveillance notify body

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

(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 = Gas family

26 = Supply pressure

E = Factory setting

27 = Adjusted for gas type X

28 = Space for national brands

CE Marking

- The CE marking documents that the boilers satisfy:

- The essential requirements of the Directive regarding gas appliances (Directive

90/396/CEE)

- The essential requirements of the Directive regarding electromagnetic compatibility

(Directive 89/336/CEE)

- The essential requirements of the Efficiency Directive (Directive 92/42/CEE)

- The essential requirements of the low voltage Directive (Directive 73/23/CEE)

7 8

21 22

C D

General info

For your own safety, observe these safety instructions.:

PLEASE NOTE:

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

situations.

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. 12

1.5 Main characteristics ................................................................ pag. 12

DIRECTIONS FOR

INSTALLERS......................................................................... pag. 13

2.1 Installations rules .................................................................... pag. 13

2.2 Installation ............................................................................... pag. 13

2.2.1 Packing ....................................................................... pag. 13

2.2.2 Positioning the boiler .................................................. pag. 14

2.2.3 Assembling the boiler ................................................. pag. 15

2.2.4 Ventilation ................................................................... pag. 15

2.2.5 Flue gas discharge system ........................................ pag. 15

2.2.6 Discharge and suction pipe configuration .................. pag. 17

2.2.7 Positioning of terminals for type C boilers .................. pag. 18

2.2.8 Smoke evacuation Ø80 air suction flange .................. pag. 19

2.2.9 Discharge of flue gas into coaxial ducts with a

diameter of 100/60 mm (Type A accessories) ........... pag. 20

2.2.10 Flue gas discharge and air suction with separate

pipes with 80 mm diameter ........................................ pag. 21

2.2.11 Measurements of combustion efficiency ................... pag. 23

2.2.12 Connection to the gas mains...................................... pag. 24

2.2.13 Hydraulic connection .................................................. pag. 24

2.2.14 Electrical connection ................................................. pag. 26

2.2.15 Jumper location ......................................................... pag. 26

2.3 Wiring diagram ........................................................................ pag. 27

2.3.1 Pratical connection diagram ..................................... pag. 27

2.4 Filling the system ................................................................... pag. 28

2.5 Starting the boiler ................................................................... pag. 28

2.6 Adjusting the burner ............................................................... pag. 29

2.7 Modification of other gases ................................................... pag. 30

2.8 Failure code ............................................................................ pag. 31

USERS' INSTRUCTION ............................................... pag. 33

3.1 Control panel ........................................................................... pag. 33

3.2 Switching on/off ....................................................................... pag. 34

3.3 Antifrost protection .................................................................. pag. 35

3.4 Important suggestion and notes ............................................. pag. 35

Installation info

TECHNICAL FEATURES AND DIMENSIONS

• 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 set at 12

litres/min.

• Control panel with IP X4D insulation pro-

tection

• Manometer;

• 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) for

EVE 05 CTN 24 F - CTFS 24 F - CTFS 24

CTN 24 ;

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

mer/winter position.

• Reset push button / Chimney sweeper but-

ton / Error codes visualization / Thermo-

meter

• Paper mounting jig for connections predi-

sposition

• Mounting jig opt.

• Flue gas antispillage thermostat (EVE 05

TN)

1.1 - TECHNICAL FEATURES

EVE 05 is a wall hung gas boiler with built-in

atmospheric gas burner; it is available in the

following versions:

24 with 24 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

combustion chamber;

All versions have electronic ignition.

Models in the EVE 05 series are the following:

EVE 05 CTN 24 F open boiler, with electronic

ignition and instantaneous D.H.W. produc-

tion;

EVE 05 RTN 24 open boiler, with electronic

ignition, for heating only;

EVE 05 CTFS 24 F forced draught room se-

aled boiler, with electronic ignition and in-

stantaneous D.H.W. production;

EVE 05 RTFS 24 forced draught room sea-

led boiler, with electronic ignition for heating

only;

EVE 05 CTN 24 open boiler, with electronic

ignition and instantaneous D.H.W. produc-

tion with DHW plates heat exchanger

EVE 05 CTFS 24 forced draught room sea-

led 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 (CTN 24F - CTFS24F);

• Plates heat exchanger for the DHW pro-

duction (CTN 24 – CTFS 24)

• Electronic ignition;

• Electronic flame modulation;

• Minimum output control;

• Electronic control of ignition ramp;

• Anti-freeze function;

fig. 1

1.2 - DIMENSIONS

420

700

123

120 90

152

107

43 56

60 70

61131

CF G

C.H. system flow

D.H.W. outlet

Gas inlet

D.C.W. inlet

C.H. system return

Filling valve

Heating circuit safety valve

Boiler drain cock

view from above

view from below

310

Installation info

fig. 3

EVE 05 CTN 24 F

EVE 05 CTFS 24 F

fig. 2

CF G R

CF G

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 manifold/down-draught

diverter

11 Flue gas anti-spillage thermostat

12 Expansion vessel inflating valve

13 Expansion vessel

14 Automatic air vent

15 Circulating pump

16 C.H. temperature sensor

17 Minimum water pressure switch

18 By-pass (unadjustable)

19 Boiler drain cock

20 Heating circuit safety valve

21 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

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

General info

fig. 5

EVE 05 RTFS 24

fig. 4

EVE 05 RTN 24

FG RM

Gas valve

Burner nozzles

Ionisation/Ignition electrode

Burner

Monotermal heat exchanger

Flue gas manifold/down-draught

diverter

Flue gas anti-spillage thermostat

H.L. thermostat

Expansion vessel inflating valve

Expansion vessel

Automatic air vent

Circulating pump

C.H. temperature sensor

Minimum water pressure switch

By-pass

Boiler drain cock

Heating circuit safety valve

Filling valve

F D.C.W. inlet

G Gas inlet

R C.H. system return

M C.H. system flow

Gas valve

Burner nozzles

Ionisation/Ignition electrode

Burner

Monotermal heat exchanger

Air/flue coaxial duct

Flue gas extractor fan

Micro-switch on flue gas pressure

switch

Flue gas pressure switch

H.L. thermostat

Expansion vessel inflating valve

Expansion vessel

Automatic air vent

Circulating pump

C.H. temperature sensor

Minimum water pressure switch

By-pass

Boiler drain cock

Heating circuit safety valve

Filling valve

F D.C.W. inlet

G Gas inlet

R C.H. system return

M C.H. system flow

FG RM

General info

fig. 7

EVE 05 CTN 24

EVE 05 CTFS 24

fig. 6

2425

2526

1 Flow switch - Cold water filter

2 D.H.W. flow restrictor

3 Gas valve

4 D.H.W. temperature sensor

5 Plates heat exchanger for DHW

production

6 Circulating pump

7 Burner nozzles

8 Ionisation/Ignition electrode

9 Burner

10 Monothermal heat exchanger

11 Combustion chamber

12 Flue gas manifold/down-draught

diverter

13 Flue gas anti-spillage thermostat

14 H.L. thermostat

16 Expansion vessel inflating valve

17 Expansion vessel

18 Automatic air vent

19 By-pass

20 C.H. temperature sensor

21 Diverting valve motor

22 Boiler drain cock

23 Diverting valve

24 Heating circuit safety valve

25 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

1 Flow switch - Cold water filter

2 D.H.W. flow restrictor

3 Gas valve

4 D.H.W. temperature sensor

5 Plates heat exchanger for DHW

production

6 Circulating pump

7 Burner nozzles

8 Ionisation/Ignition electrode

9 Burner

10 Monothermal heat exchanger

11 Flue gas extractor fan

12 Air/flue coaxial duct

13 Micro-switch on flue gas pressure

switch

14 Flue gas pressure switch

15 H.L. thermostat

16 Minimum water pressure switch

17 Expansion vessel inflating valve

18 Expansion vessel

19 Automatic air vent

20 By-pass

21 C.H. temperature sensor

22 Diverting valve motor

23 Boiler drain cock

24 Diverting valve

25 Heating circuit safety valve

26 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

General info

l/min

bar

°C

bar

l/min.

°C

V-Hz

A (F)

°C

g/s

mg/kWh

RTN 24

10,17

90,57

89,76

92,60

87,14

92,85

90,83

2,38 - 2,28

86,7

14,11-20,03

117,89

2,9-5,1

152,4

9,17 - 7,15

0,831

RTFS 24

24,2

9,9

91,34

89,77

89,93

87,15

92,71

87,81

1,7-1,37

116,7

13,41-15,1

60,86

3,0-7,0

184,4

12,19-7,29

0,405

CTN 24 F

10,17

90,57

89,76

92,60

87,14

92,85

90,83

2,38 - 2,28

86,7

14,11-20,03

117,89

2,9-5,1

152,4

9,17 - 7,15

0,831

CTFS 24 F

24,2

9,9

91,34

89,77

89,93

87,15

92,71

87,81

1,7-1,37

116,7

13,41-15,1

60,86

3,0-7,0

184,4

12,19-7,29

0,405

CTN 24

10,17

90,57

89,76

92,60

87,14

92,85

90,83

2,38-2,28

86,7

14,11-20,03

117,89

2,9-5,1

152,4

9,17-7,15

0,831

RTN 24

2H3P

7,3

0,7

3,5

137,9

230/50

3,15

X4D

CTN 24 F

2H3P

7,3

0,7

3,5

137,9

2,5

0,5

11,5

7,6

8,6

9,8

11,4

13,7

35 - 57

230/50

3,15

X4D

CTFS 24 F

2H3P

7,10

0,7

3,5

137,9

2,5

0,5

11,5

7,6

8,6

9,8

11,4

13,7

35 - 57

230/50

3,15

130

X4D

36,5

39,5

RTFS 24

2H3P

7,10

0,7

3,5

137,9

230/50

3,15

130

X4D

34,5

37,5

CTN 24

2H3P

7,3

0,7

3,5

137,9

2,5

0,5

11,5

7,6

8,6

9,8

11,4

13,7

35 - 57

230/50

3,15

X4D

EVE 05

CTFS 24

2H3P

7,10

0,7

3,5

137,9

2,5

0,5

11,5

7,6

8,6

9,8

11,4

13,7

35 - 57

230/50

3,15

132

X4D

38,5

41,5

CTFS 24

24,2

9,9

91,34

89,77

89,93

87,15

92,71

87,81

1,7-1,37

116,7

13,41-15,1

60,86

3,0-7,0

184,4

12,19-7,29

0,405

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.

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

(value according EN 297/A3 + EN 483)

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 USE

OTHER 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 (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

Installation info

fig.8

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,

- Only for models TFS, 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.

DIRECTIONS 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:

Observe the corresponding technical rules and

the building supervisory and statutory

regulations of the country of final use when

installing and operating the system.

Always ensure that an appropriately specialised

company is entrusted with installation, gas

supply and flue gas connection, commissioning

and power supply connection, as well as all

servicing and repair work.

Work on gas conduits and fittings must only

be carried out by a registered service provider.

The system must be cleaned and serviced once

a year. This includes an inspection of the entire

system to see if it is in full working order.

Defects and faults must be eliminated

immediately.

Please note that we can accept no liability

whatsoever for loss or injury resulting from

unauthorised adjustment or manipulation of the

system’s control or regulating devices.

2.2 - INSTALLATION

Only for the TFS (room sealed fan assisted)

models a bag containing:

- 2 sealed room closing covers + 2 sealing

gaskets and the fixing screws. “

Installation info

fig. 9

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

ØL mm

= 3/4'' 107

= 1/2'' 107

= 3/4'' 107

= 1/2'' 107

= 3/4'' 107

= 143

=60

For EVE 05 TFS

Since the temperature of the wall

on which the boiler is installed

and the temperature on the sur-

face of the coaxial duct do not increase, in

normal operating conditions, more than 60 K,

it is not necessary to keep a minimum distan-

ce 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

56 60

752

00332145

143

14.5

420

CONNECTION POSITION SEEN FROM BELOW

MOUNTING JIG FOR BOILER CONNECTIONS 00332145

EVE 05 TN

Maintain distance of at least 200

mm on the sides with wall which

have inflammable materials.

107

290

143

360 60

130

Installation info

2.2.3 - ASSEMBLING THE BOILER

Before connecting the boiler to the D.H.W. and

heating system pipes, carefully clean the pi-

pes to remove all traces of metal resulting from

processing and welding operations as well as

any oil and grease which could damage the

boiler or jeopardize its operation.

To install the boiler:

- Fix with tape the paper template to the wall;

- make two Ø 12 holes in the wall and insert

the dovels;

- position the junction points for the connect-

ion of the gas supply pipe, cold water sup-

ply pipe, D.H.W. outlet, CH flow and return

in the positions shown by the template. ;

- fit the boiler onto the support hooks;

Do not use solvents which

could damage the

components.

Unical refuses all liability for

injury to persons and animals or

damage to property resulting

from non-observance of the abo-

ve.

- 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 particular-

ly:

NATURAL DRAUGHT OPEN FLUE BOILERS

(TYPE B11bs and VMC INSTALLATIONS)

The boilers EVE 05 CTN 24 F, EVE 05 RTN 24,

EVE 05 CTN 24, are open flue boilers and are

foreseen for chimney connection: the air for

combustion is taken directly from the room in

which the boiler is installed.

The room can have both a direct ventilation

(i.e. with ventilation openings facing out-

wards) or an indirect ventilation (i.e. with ven-

tilation openings facing an adjacent room) pro-

vided that the following requirements are com-

plied with:

Direct ventilation:

- The room has to have a ventilation open-

ing 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 it

should be protected with a grate not redu-

cing its usefull ventilation section.

- A correct ventilation can be optained also

through the addition of more openings, pro-

vided the addition of the different sections

is not less than that really needed.

connection duct to the draught diverter.

- starting from the draught diverter, the duct

must have a vertical section with a length

more than twice the diameter, before get-

ting into the chimney.

2.2.5 - FLUE GAS DISCHARGE

SYSTEM

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

strength and low thermal conductivity;

- it must be perfectly sealed to prevent cool-

ing 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

- 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 ventila-

tion opening has to be the properly sized.

Indirect ventilation

In 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, sucting

the air from an adjacent room, making an

opening in the lowest part of a door.

This solution is possible only if:

- The adjacent room is not a bed room

- The adjacent room is not a common part

of the building and is not a room with fire

danger (e.g. a fuel deposit, a garage, etc..)

FORCED DRAUGHT ROOM SEALED 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 particular ven-

tilation 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 24 F - EVE 05 RTFS 24 -

EVE 05 CTFS 24 are installed in a room ac-

cording to the chimney configuration on type

B22, the same ventilation requirements esta-

blished in paragraphs Direct ventilation and

Indirect ventilation apply.

Installation info

fig. 10

2 Ø min.

Slope

min. 3%

1,5 m min.

2 Ø

1 m max.

1,5 m min.

2 Ø

Slope

min. 3%

1 m max.

2 Ø min.

> 3 Ø

fig. 11

210

Ø 130

180

Direct emission into the atmosphere

Natural draught boilers can discharge

combustion products directly into the atmo-

sphere 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 EVE 05 TN 24, there must be no

more than 2 direction changes;

- it must receive the discharge from a single

boiler;

- the part going through the wall must be

protected by a sheath duct; the part of the

sheath duct facing the inside of the build-

ing 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).

DIMENSIONS FOR CONNECTING FLUE GAS DUCT

WARNING:

The boiler is fitted with an automatic safety

reset device as protection against spillage of

combustion products inside the building.

In case of the device operation, the boiler will

remain in lock-out position indicating the ano-

maly on the display with the symbol “M” (fig.

35) (failure code AF)

After the cooling down of the smoke

thermostat it will be possible to restart the

boiler by pressing the reset button L fig. 35.

It is absolutely forbidden to

by-pass the smoke

thermostat.

If the boiler cuts off regularly, it

is necessary to ask a technician for a check

of the flue gas exhaust duct. This duct may

be obstructed or may be unsuitable for the

discharge of flue gas into the atmosphere.

UNICAL refuses all liability for

damage caused as a result of in-

correct installation, use, modifica-

tion of the boilers or for non-observance of

the instructions provided by the manufacturer

or applicable installation regulations

Installation info

2.2.6 - 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 hori-

zontal exhaust and suction terminals

directly into the atmosphere using

coaxial or dual ducts. The distance

between the air intake duct and the flue

gas outlet duct must 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 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.

C42 Boiler designed for connection to col-

lective chimneys including two ducts,

one for the suction of combustion air

and the other for the exhaust of the

combustion products, through coaxial

or dual ducts.

The chimney must comply with

relevant applicable law provisions.

C52 Boiler with separate combustion air

suction and combustion product

exhaust ducts.

These ducts can discharge into 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 air

supply terminal and fitted to an indivi-

dual or shared chimney.

The chimney must comply with re-

levant applicable law provisions.

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.

Note: type B22

is not approved by

Turkish market.

Installation info

fig. 12

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

Installation info

fig. 13

fig. 14

Diaphragm

Ø 42 mm

Fitting of the diaphragm Ø 42

2.2.8 - SMOKE EVACUATION Ø 80

WITH AIR SUCTION

FLANGE - Type B22

(see par. 2.2.6)

Note: For evacuation system with 80 mm dia.

and a lenght between 0.5 m and 4 m, it

is necessary to introduce a diaphragm

of 42 mm dia. supplied with the boiler in

the plastic bag, into the fan outlet adap-

tor (see fig. 13).

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. 13-

14) it is necessary to close the

holes of air entry ''1-2'' with

the provided for closing co-

vers and the gaskets delive-

red 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

Installation info

fig. 15

fig. 16

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

2.2.9 - 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 15, for installa-

tions with horizontal coaxial pipe up to 1

m and with vertical coaxial pipe up to 2

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 16, 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. 15-

16) it is necessary to close the

holes of air entry ''1-2'' with

the provided for closing co-

vers and the gaskets delive-

red with the boiler.

Installation info

fig. 17

152

100

Up to

ΔΔ

Δ P = 20 Pa

Rubber foam

gasket

Diaphragm

Ø 42

fig. 18

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

2.2.10 - FLUE GAS DISCHARGE

AND AIR SUCTION WITH

DUAL DUCTS WITH 80 mm

DIAMETER

NB: The maximum allowable pressure loss,

irrespective of the type of installation, must

not exceed 50 Pa .

For 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. 18).

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. 18) 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 aspiration will

be effected by the hole ''1'', close the hole

''2''.

Installation info

fig. 19

fig. 20

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

120 152

Ø 80

123

Example N.1

Installation info

fig. 22

fig. 21

135

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

Air

inlet

Smoke

outlet

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

2.2.11- MEASUREMENTS OF

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. 22).

- the flue gas temperature and CO

% mea-

sured in hole 1 (see fig. 22).

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

Installation info

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.

Basing on the feeding water

hardness, it has to be

considered the opportunity to

install appropriate devices for

POSITION

By-Pass

POSITION

By-Pass

OPEN

ADJUST

By-Pass

By-Pass ADJUSTMENT

SCREW CTN 24 - CTFS 24

fig. 24

INSTALLATION WITH BENDED PIPES

(00361193 kit pipes)

INSTALLATION WITH VALVES

(00360682 + 00361193)

INSTALLATION OF BEBDED PIPES AND PRESSURE FITTING 00361265

OPTIONAL CONNECTION KITS

water treatment (for domestic use).

With feeding water hardness higher than 14°f

it’s always recommended the water treat-

ment.

2.2.12 - CONNECTION TO THE GAS

MAINS

The supply pipe must have a section which is

the same as or greater than the one used in

the boiler.

Comply with the applicable local installation

requirements which shall be considered as

having been incorporated in full in this 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

of the air contained in the piping and ap-

pliances, proceding appliance by

appliance.

- Check, with the gate valve of all the ap-

pliances Off, that there are no gas leaks.

During the 2

quarter of a hour from the

beginning of the test no pressure reduc-

tion is to be detected on the gas pressure

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

leaks using a naked flame.

While connecting gas inlet pipe of the boiler to the pipe coming from

gas network, it is MANDATORY to insert a TIGHT GASKET, whose

dimensions and material must be adequate. Connection is NOT sui-

table for hemp, teflon strip or similar materials

HEATING

The heating flow and return must be con-

nected to the relevant ¾” connections of the

boiler M and R (see fig. 9).

When determining the size of the heating

circuit pipes it is essential to bear in mind the

pressure losses induced by radiators, any

thermostatic valves, radiator cut-off valves

and the configuration of the system.

In the boiler, onto a brass group, positioned

between the flow and return, an automatic

by-pass device is fitted (a differential valve

with a flow rate of about 150 l/h) which gua-

rantees always minimum flow rate through

the heat exchanger, also in the case, for

instance, that all the thermostatic valves fit-

ted on the radiators, are closed.

On boilers model: RTN 24 – CTN 24 F – RTFS

24 – CTFS 24 F the by-pass is automatic

and pre-adjusted.

On boilers model CTN 24 – CTFS 24 is pos-

sible to adjust the by-pass by acting onto

the adjusting screw

We recommend that the discharge of the

safety valve mounted in the boiler be con-

veyed 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

damage caused by non-observance of this

technical precaution.

D.H.W.

Inlet and outlet of D.H.W. must be connected

to the relevant ½” connections of the boiler

F and C (see fig. 9).

The hardness of the supply water affects

the frequency of the cleaning of the heat

exchanger.

For the lower connections po-

sitioning, see the mounting jig

of figure 9

Installation info

fig. 23

EVE 05 RTN 24 - EVE 05 RTFS 24

EVE 05 CTN 24 F - EVE 05 CTFS 24 F

EVE 05 CTN 24 - EVE 05 CTFS 24

6,2

6,0

5,8

5,6

5,4

5,2

5,0

4,8

4,6

4,4

4,2

4,0

3,8

3,6

3,4

3,2

3,0

2,8

2,6

2,4

2,2

2,0

1,8

1,6

1,4

1,2

1,0

0,8

0,6

0,4

0,2

0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

1250 1300 1350

1400

6,2

6,0

5,8

5,6

5,4

5,2

5,0

4,8

4,6

4,4

4,2

4,0

3,8

3,6

3,4

3,2

3,0

2,8

2,6

2,4

2,2

2,0

1,8

1,6

1,4

1,2

1,0

0,8

0,6

0,4

0,2

0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

1250 1300 1350

1400

6,2

6,0

5,8

5,6

5,4

5,2

5,0

4,8

4,6

4,4

4,2

4,0

3,8

3,6

3,4

3,2

3,0

2,8

2,6

2,4

2,2

2,0

1,8

1,6

1,4

1,2

1,0

0,8

0,6

0,4

0,2

0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200

1250 1300 1350

1400

DIAGRAM FLOW RATE/MANOMETRIC HEAD AVAILABLE FOR THE CH SYSTEM

Manometric Head available in m W.G.

Flow rate Q (l/h)

Manometric Head available in m W.G.

Flow rate Q (l/h)

Manometric Head available in m W.G.

Flow rate Q (l/h)

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

= By-Pass CLOSED

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

Installation info

2.2.14 - ELECTICAL CONNECTIONS

The electrical connections of EVE 05 are

shown in the clause ‘’WIRING DIAGRAMS’’

(par. 2.3 - pag. 29)

The boiler must be connected to

the mains supply at

230 V - 50 Hz. This connection is

to be perfectly done, as foreseen

by the IEC and local rules and must be

earthed.

This fundamental requirement for safety 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 or

injury caused by failure to earth the system

properly.

Gas, domestic water and central heating

pipes are not suitable for earthing purpo-

ses.

The boiler is supplied with 1.5 m long

3 x 0.75 mm² cord.

A double pole switch with a distance between

the contacts higher than 3 mm, must be ins-

talled 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 securing screws B in order

to rotate the control panel

- Remove the casing.

- To get access directly to the connections,

unscrew the 4 screws on the panel cover

(CP) and remove the cover.

Replacement of the electrical supply

cord

The replacement of the electrical supply

cord has to be done by competent technical

personnel.

Should the electrical supply cord be repla-

ced, you have to use the original cable code

95600259.

fig. 24

- Open the rear cover (CP) and replace

the cable A (connector A7)

The female faston of the hearting cable

has to be connected on the male faston

GND 1

Connection of the ON/OFF room

thermostat (RT)

- Approach the connector M1.

- Remove the existing jumper and connect,

on its place the room thermostat cable.

Collegamento ad un bollitore esterno

It is necessary to make the electrical

connection as indicated.

The diverting valve has to be fitted with the

priority to the DHW circuit and the microwitch,

whose its motor must to be equipped, has to

be closed once the DHW has been satisfied

and the valve is retourned in the normal

position.

The microswitch contacts C. and N.C. have

to be connected to the two pole terminal block

(TA), fitted on the boiler panel board, after

removal of the existing link (bridge - shunt).

The connection of a room thermostat will be

done onto the same terminals, in parallel with

the contacts of the diverting valve.

2.2.15 - JUMPER LOCATION

They are placed on the modulation card and

their purpose is to settle basic operational

functions.

In order to get access to the jumper:

- WARNING! switch off electrical supply.

- Remove the casing.

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

NAT.

For LPG boilers, the jumper is on LPG.

The boilers operating with natural gas will at-

tempt the ignition for 3 times before to be put

in lock-out.

The boilers operating with LPG will be put in

lock-out after a single ignition attempt.

LPG

JP1

NAT

LPG

NAT

230V / 30-65°C

Boiler

thermostat

3 Way motor 230V with

internal microswitch

Boiler panel board

TA terminal block

Installation info

2.3 WIRING DIAGRAM

2.3.1 ACTUAL WIRING DIAGRAM

fig. 25

LEGENDA

A1...A8 = Connectors

TA = Room thermostat (optional)

VG = Gas valve

RIV/AC = Ignition/Ionisation electrode

V = Fan (only for TFS)

PV = Fan pressure switch (only for TFS)

TL = H.L. Thermostat

TF = Flue-gas spillage thermostat

P = Circulating pump

DK = Minimum water pressure switch

SR = C.H. sensor

FL = Flow switch

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

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

MD = Modulating coil

MD – MODULATING COIL

DK – MINIMUM WATER PRESSURE

SR – C.H. TEMPERATURE SENSOR

TA – ROOM THERMOSTAT

TF – FLUE GAS SPILLAGE THERMOSTAT

TL – HIGH LIMIT THERMOSTAT

PV – FAN PRESSURE SWITCH

TL – HIGH LIMIT THERMOSTAT

FL = Flow switch

SS = DHW sensor

MDV – MOTOR 3

WAY VALVEGREEN

V – FAN

MAIN SUPPLY

230V-50HZ

P – PUMP

IONISATION

IGNITION ELECTROD

GAS VALVE

- 1/4 W

Installation info

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

At 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 TEMPERATURE

OF THE HEATING SENSOR (SR) AND D.H.W. SENSOR (SS) with a nominal resistance of ten kOhm

T°C0123456789

0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987

10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153

20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466

30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584

40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768

50 3627 3491 3362 3238 3119 3006 2897 2792 2692 2596

60 2504 2415 2330 2249 2171 2096 2023 1954 1888 1824

70 1762 1703 1646 1592 1539 1488 1440 1393 1348 1304

80 1263 1222 1183 1146 1110 1075 1042 1010 979 949

90 920 892 865 839 814 790 766 744 722 701

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 regu-

lations concerning water and gas instal-

lation, smoke evacuation and electrical

installation

- the flue gas exhaust duct and its terminal

are installed correctly: when the boiler

FILLING TAP

is switched on there must be no le-

akage of any combustion products

from any seals;

- 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:

otherwise, convert the boiler to use the

gas available (see section: “MODIFICA-

TION FOR OTHER GASES “): this ope-

ration must be performed by quali-

fied technicians;

- the gas supply tap is open;

- there are no gas leaks;

- the external mains switch is on;

- the boiler’s safety valve is not locked;

- there are no water leaks.

SWITCHING ON AND OFF

To switch on and off the boiler follow the

indications in the “Users’ Instructions”.

Filling position

fig. 26

Normal posi-

tion

FILLING TAP

2.4 -FILLING THE

SYSTEM

After completing all the connections of the

system the heating circuit can be filled.

This filling operation must be performed with

care as follows:

- open the air vents of the radiators and

check that the automatic air vent in the

boiler is works properly;

- gradually open the water tap and check

operation of any automatic air vents in-

stalled 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 ven-

ts;

- after switching on the boiler and after the

system has reached the correct tempe-

rature, stop the pump and repeat the air

relief operations;

- let the system cool down and then adjust

the water pressure to 0.8/1 bar.

WARNING

NB: After a given period of

inactivity and without electri-

cal supply the pump could be

blocked.

Before switching on the boiler it is important

to restart the pump as follows: loosen the

protection screw in the centre of the pump

motor, insert a screwdriver in the hole and

then manually rotate the pump shaft

clockwise.

Once the pump has been restarted tighten

the protection screw and check that there

are no water leaks.

WARNING

Once the protection screw has been remo-

ved a little water may leak out. Before repla-

cing the casing of the boiler dry any wet

surfaces.

The minimum water pressure switch does

not give electrical impulse to the burner to

ignite when the pressure is lower than 0.4

bar. The pressure of the water in the C.H.

system must not be lower than 0.8/1bar; if

this value is lower use the water filling tap on

the boiler to adjust the pressure.

This must be performed when the system is

cold. Use the pressure gauge on the boiler

to read the pressure value of the circuit.

Adjustment info

°C

Outlet pressure test nipple

fig. 27

2.6 - ADJUSTING THE

BURNER

All the instructions below are for the exclusive

use of qualified technicians.

All the boilers leave the factory calibrated and

tested.

If it is necessary to change the calibration fol-

lowing changes in the type of gas or adapta-

tion to the supply network conditions, it is

necessary to recalibrate the gas valve.

WARNING: During these steps do not draw

Domestic Hot Water.

For that reason it is necessary to know the

boiler operation in chimney-sweeper mode.

In order to activate this function, push and

keep depresses the reset push button for

3 seconds, on the control panel, then push

once again the same button: the display

symbols “F” and “L” will be lighted (F: blink-

ing – L: fixed) and the boiler will operate at

the maximum capacity. By pushing again

the reset push button: the display symbols

“F” and “L” will be lighted (F: blinking – L:

blinking) and the boiler will operate at the

minimum capacity. The chimney sweeper

function remains active for 15 minutes. For

cleaning this function before this fixed

period, switch OFF and ON the boiler.

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);

- Remove the cover (A) protecting the pres-

sure regulator on the top of the modulat-

ing coil.

Connect a manometer at the outlet gas

pressure test nipple (fig. 28).

Activate the chimney sweeper function to

the maximum capacity (“F” blinking; “L”

fixed); when the burner is ignited, check

that the “MAXIMUM” pressure value cor-

responds to that indicated on the table

“NOZZLES - PRESSURES”:

- Correct eventually the value rotating the

nut “C” with a 10 mm wrench (fig. 28);

by rotating clockwise, the gas pressure

increases, anticlockwise the gas pressure

is reduced.

2) Minimum output adjustment

- Push a second time the reset push button

and the boiler will operate at the minimum

capacity (both leds F and L will blink).

- When the burner is ignited, check that the

MINIMUM pressure value corresponds to

that indicated on the table “NOZZLES –

PRESSURES, etc.

- Correct, eventually, the value rotating the

red screw “B” with a cross-screw driver or

a 6 mm wrench (fig. 28): by rotating

clockwise the gas pressure increases,

by rotating counter clockwise the gas pres-

sure decreases

GAS VALVE

CHIMNEYSWEEPER

ACTIVATION

OPERATION AT THE MAXI-

MUM CAPACITY

OPERATION AT THE MINI-

MUM CAPACITY

Push the reset

push button for 3

seconds

Push again the reset push

button; the symbol “F” (Cen-

tral Heating) blinks, the sym-

bol “L” (burner in operation) is

fixed.

Push again the reset push

button; the symbol “F” (Cen-

tral Heating) and the symbol

“L” (burner in operation) are

both blinking

fig. 28

Inlet

pressure

test nipple

B = Screw

(red) for

minimum

pressure

adjustment

C = Adjust-

ment nut (10

mm) for

maximum

pressure

3) Ending of basic adjustings

- check the minimum and maximum pres-

sure values of the gas valve;

- if necessary make any fine adjustments

- Clear the chimneysweeper function by cut-

ting off the voltage.

- Remove the plastic pipe from pressure test

nipple and close the inner screw;

- Using a soapy solution check for gas

leaks.

PRESSURE TEST NIPPLE

fig. 29

Adjustment info

fig. 30

EVE 05 CTN 24 F - EVE 05 CTN 24 - EVE 05 RTN 24

Tipe of

gas

Output

min. - max

(kW)

Input

min. - max

(kW)

Supply

pressure

(mbar)

No. of

Nozzles

Diaphragme

(mm)

Natural gas(G20)

Propan (G31)

10,17 - 24,0

11,5 - 26,5

Nozzles

(mm)

EVE 05 CTFS 24 F - EVE 05 CTFS 24 - EVE 05 RTFS 24

9,9 - 24,2

11,5 - 26,5

1,25

0,80

2,7

6,2

13,3

33,0

1,22 m³/h

0,89 kg/h

2,80 m³/h

2,06 kg/h

1,30

0,80

2,3

6,2

12,0

33,0

1,22 m³/h

0,89 kg/h

2,80 m³/h

2,06 kg/h

Gas nat. (G20)

Propano (G31)

fig. 31

JP1: For nat. gas boilers, the jumper is

on NAT.

For LPG boilers, the jumper is on

LPG.

LPG

JP1

NAT

LPG

NAT

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

NOZZLES - PRESSION - DIAPHRAGME - CONSUMPTION TABLE

max.

min.

(mbar)

max

(mbar)

min.

Burner pressure

Tipe of

gas

Supply

pressure

(mbar)

No. of

Nozzles

Diaphragme

(mm)

Nozzles

(mm)

min.

(mbar)

max

(mbar)

Burner pressure

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 of the main burner

and replace them with those with a diame-

ter 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. 31

- remove plug ‘’A’’ (fig.28) on the gas valve

and fully tighten max pressure adjustment

screws ‘’B’’

- 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

the label supplied in the kit with the infor-

mation required and stick it onto the boiler

alongside the data plate.

for conversion from LPG to natural gas

- remove the main burner;

- disassemble injectors of the main burner

and replace them with those with a diame-

ter 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 31;

- 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 burner 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

the label supplied in the kit with the infor-

mation required and stick it onto the boiler

alongside the data plate.

Gas

consumption

max.

min.

Gas

consumption

Output

min. - max

(kW)

Input

min. - max

(kW)

Service info

2.8 FAILURE CODES

In case of failure the burner is automatically deactivated and the symbol on the display

is shown. By pushing the reset button the failure blinking code is shown on the display.

Each fault is characterised by a priority level : if different failures are detected at the same time,

the code with the highest priority level is shown.

The following failure codes are recognised:

2.10.1 Lock-out (priority 1)

Description:

Modureg coil interrupted

Possible solution:

verify the wiring, replace the modureg

2.10.2 Lock-out (priority 2)

Description:

Fault at the fan pressure switch

Possible solution:

Verify the fan pressure switch (TFS version) and the electric connections or

replace the main PCB.

2.10.3 High temperature (priority 3)

Description:

Overheating of the boiler

Possible solution:

verify the correct operation of the pump and, eventually, descale the heat exchanger.

2.10.4 Difficult smoke evacuation (priority 4)

Description:

Difficult smoke evacuation

Possible solution:

TN boilers: verify the chimney draught, or the smoke thermostat.

TFS boilers: verify the fan and its own pressure switch operations.

2.10.5 Lack of water (priority 5)

Description:

Insufficient water pressure: intervention of minimum water pressure switch.

Possible solution:

Set the water pressure by the filling valve and look for possible leakages. If the code appears

again, call the service technician.

2.10.6 FROST (priority 6)

Description:

Freezing of the heat exchanger is detected if CH sensor < 2°C; ignition in inhibited until CH

sensor reaches 5°C.

Possible solution:

Cut off the voltage, close the gas feeding, call the service technician.

2.10.7 High Limit thermostat (priority 7)

Description:

High limit thermostat intervention

Possible solution:

Verify the water circulation into the heat exchanger; verify that the high limit thermostat and its

own connections are not interrupted

°C

Service info

°C

2.10.8 Sanitary sensor (priority 8)

Description:

Sanitary temperature sensor intervention

Possible solution:

verify the sensor operation and its own connections

2.10.9 Heating sensor (priority 9)

Description: Heating temperature sensor intervention

Possible solution: verify the sensor operation and its own connections

2.10.10 Factory parameters (priority 10)

Description:

Factory parameters alteration

Possible solution:

with the access code, reset the 13 factory parameters

2.10.11 Flame control (priority 11)

Description:

Burner control is damaged.

Possible solution:

replace the main PCB.

2.10.12 Lock-out

Description:

Lack of gas or burner ignition not detected

Possible solution:

verify the gas feeding and the correct operation of the ignition electrode

°C

The tool blinks, by pushing the reset push

button no failure codes are displayed.

Service info

fig. 34

EVE 05 CTN 24 F - EVE 05 CTN 24 F- EVE 05 CTFS 24 F - EVE 05 CTFS 24

EVE 05 RTN 24 - EVE 05 RTFS 24

A = Manometer

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

rature control

C = D.H.W. temperature control (only for

combi C version)

D = Reset button / chimney sweeper

/ diagnostics

F = CH mode active

G = DHW mode active

I = Lock out

L = Burner in operation

M = Failure

N = Temperature or failure code indication

Summer/Winter switch + C.H.

temperature control (B)

You can select which mode to

use by turning this knob.

If the knob is in the following po-

sition – – it indicates that

the boiler is working only for do-

mestic hot water production and

that the temperature can be adju-

sted turning knob ''C''.

If the knob is set within the ran-

ge indicated by the arrow on the

illustration it means that the boi-

ler always gives priority to the pro-

duction of domestic hot water (if

it is requested) and controls the

temperature of the water of the

heating circuit from a minimum

of 45°C to a maximum of 78°C.

D.H.W. temperature control

F - EVE CTFS 24/28 F)

If the knob is set within the ran-

ge indicated by the arrow on the

illustration it means is possible

to adjust the domestic hot

water temperature. The

temperature can be controlled

from a minimum of 35°C to a

maximum of 57°C.

By adjusting the Domestic

Hot Water temperature to the

real required temperature,

you will avoid to mix hot

BD ACE

BD AE

MAX

water with cold water, in this

way reducing both the

boiler operation costs and

the scaling formation.

MAXMIN

fig. 35

°C

MA X

MA XMIN

EVE

°C

MA X

MA XMIN

EVE

USERS' INSTRUCTION

3.1 - CONTROL PANEL

Service info

Reset push button

In order to restart the boiler

when the lockout symbol is

displayed, it will be necessary to

push this button.

Chimney sweeper button

This push button, depressed for

3 seconds, activates the

chimney sweeper function: the

boiler will be forced to operate at

the maximum (or minimum)

capacity, in order to allow the

gas valve adjustment and the

smoke analysis.

When this function is activated,

by pushing this button once, the

boiler will operate at maximum

capacity. The radiator symbol will

be blinking, while the flame

symbol will be permanently

lighted.

By pushing again the button

(when the boiler is set to the

maximum capacity), the boiler will

operate at minimum capacity. The

radiator and the flame symbols,

both, will be blinking.

In order to clear this function

switch OFF and ON the boiler; if

not, the boiler will revert to nor-

mal operation after 15 minutes.

3.2 SWITCHING

ON / OFF

For the operation of the boiler in WINTER

mode, the knob “B” pointer must be positio-

ned in the grey range indicated by the arrow

on the figure shown above. The limit of the

arrow corresponds to the minimum and

maximum temperature values of 45°C and

78°C.

Note: If a room thermostat is fitted, set it

to the desired temperature.

SWITCHING ON

D.H.W. temperature adjust-

ment range for the models:

EVE 05 CTN/CTFS

SWITCHING OFF

Put the “B” knob on the SUN position and the

“C” knob to the minimum.

Switch OFF the boiler by acting on the

external main switch, provided the antifrost

protection is not required; otherwise go to 3.3.

For the operation of the boiler in SUMMER

mode, only for domestic hot water production,

the knob ''B'' reference has to be positioned

on the SUN and the D.H.W. temperature

value has to be adjusted using the knob ''C''.

Shut OFF the gas cock upstream

the boiler in case a prolonged inac-

tivity period of the boiler is ex-

pected.

Burner in operation

This symbol indicates that the

burner is in operation, in CH or

DHW mode.

CH mode operation

This symbol is present if there is

a CH demand. If a contemporary

DHW drawing is done, this sym-

bol disappears.

DHW mode operation

This symbol is present if there is

a DHW drawing.

Lockout symbol

The function of this symbol is to

indicate the burner safety inter-

vention, due to:

- lack of gas

- not detected ignition

In the first case, no ignition oc-

curs: verify that the gas feeding

is present.

In the second case, check the

ignition electrode and the con-

nections to the main PCB.

°C

CHIMNEY

SWEEPER AT

THE MAXIMUM

CAPACITY

CHIMNEY

SWEEPER AT

THE MINIMUM

CAPACITY

Failure symbol

The symbol is displayed when the

boiler detects an operation anomaly

or when the boiler is in lock-out for

a permanent failure. The code iden-

tifying the cause is displayed

instead of the boiler temperature by

pushing the reset push-button.

MAX

MAXMIN

Maintenance info

The boiler is fitted with an anti-freeze system

which is automatically activated when the tem-

perature of the boiler water drops below 6°C:

the burner is automatically switched on and

the pump started until the temperature of the

water in the boiler reaches 16°C.

3.3 ANTI FROST

PROTECTION

WARNING!

This anti-freezing protection

does not work when the boiler

is disconnected from the

electrical supply and/or the gas

cock is closed.

This system protects the boiler and the even-

tual DHW tank from freezing, but it does not

protect the C.H. and sanitary circuits.

Moreover special anti-freeze products suita-

ble for the multimetal installations can effecti-

vely protect the heating system from the free-

ze.

Do not use the anti-freeze products for

car's engines because they can damage

the water sealing gaskets.

The anti-freeze protection system, which is

above described, can not work when, for any

reasons, there is no electricity or gas supply.

When the temperature detected by the heat-

ing sensor is under 2 °C, the boiler's operation

is automatically inhibited until the temperatu-

re raises again to 5 °C.

In case the display shows the wrenck symbol

and thr Fr info on the display, call the service

technician.

MAX

MAXMIN

°C

3.4 IMPORTANT

SUGGESTIONS

AND NOTES

The boiler must be serviced once a year by

qualified personnel.

Correct maintenance allows the boiler to work

optimally, respecting the environment and

without endangering people, animals and pro-

perty.

Only qualified and technical personnel can

make adjustment onto the gas valve.

Nobody, included qualified personnel, is

authorized to make modifications to the

boiler.

Check regularly the pressure of the boiler wa-

ter through the pressure gauge fitted onto the

panel board, and restore it, if necessary.

If some fault appears during the operation, the

boiler is automatically put in lockout position

and the red warning lamp (G) lights. In this

case proceed as follows:

- Ascertain that the gas cock is open and that

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

cooker)

- If so, wait one minute before resetting the

boiler by depressing the L push button. If the

boiler does not start and goes into lockout

position after three times, (just once if is ope-

rated on LPG) ask for a service or for a

qualified technician.

If the boiler goes into lockout position

frequently, indication of a repeatetive fault in

the operation, ask for a service or for a

qualified technician

WARNING

In case of an open flue boiler (TN) the burner

lockout can be due to the intervention of the

smoke thermostat (antispillage thermostat). In

this case to restart the boiler it is necessary

to depress the reset push button L.

This fault, if repeated in the time, means a

bad chimney operation. Ask a qualified

technician for a check.

If the boiler remains inactive and disconnected

from the power supply for long periods it may

be necessary to unlock the pump.

This operation, for which it is necessary to

disassemble the outside casing and work on

the inside of the boiler, must be performed by

qualified personnel.

It is possible to prevent the pump from

blocking by adding special filming products

suitable for multi-metal systems to the water.

If the boiler is not disconnected from the mains

power supply the pump will not block becau-

se the boiler’s PCB has an anti-jamming pro-

gramme. In this case the pump goes into ope-

ration for a 5 seconds every 24 hour of inacti-

vity.

The boiler is equipped with a pressure gauge

which allows the control of the water pressure

in the heating system.

The pressure of the water must be around

0.8-1 bar when the C.H. system is cold.

If this value drops then use the filling cock to

adjust to the correct value.

WARNING

The anti-frost protection is ope-

rational only if the boiler is con-

WARNING

After adjusting the pressure, clo-

se the tap without over-tightening

it. If the tap is not closed properly the pressu-

re could rise, resulting in the safety valve ope-

ning and the water leaking.

nected to the mains supply and the gas cock

is open

Information for the user

The user can get access only to the parts

of the boiler which can be reached without

the need of tools.

It is therefore forbidden to disassemble the

outer casing of the boiler and tamper with

the internal parts.

AG S.P.A.

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

The Unical declines every responsibility for the possible inaccuracies if owed to errors of

transcript or press. Also reserves the right to bring those changes that it will hold necessary

to it own products or profits, without jeopardizing its essential characteristics.

Unical EVE 05 CTFS 24 Handleiding

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