Unical EVE 05 RTN 24, EVE 05 CTN 24 F, EVE 05 CTFS 24 F, EVE 05 CTN 24, EVE 05 CTFS 24 Installation, Use And Maintenance Manual

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EVE

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

00332243 - 3rd 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 TREA TMENT 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

INFORMA TION FOR YOUR SAFETY

• GAS LEAK

Don’t switch on the appliance if there is a suspicion of gas leak. Contact IMMEDIA TELY the technical personnel.

DON’T SEEK GAS LEAKS WITH NAKED FLAMES!!

• LACK OF W A TER

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

T o put again the boiler in operation, it will be necessary to press the button.

In case the boiler goes frequently into lockout position, 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

003319 80

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 temperature knob into the range shown in the figure

Set the Domestic Hot Water temperature knob into the range shown in the figure

By adjusting the Domestic Hot Water temperature to the real required temperature, you will avoid to mix hot water with cold water, in this way reducing 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 temperature knob to the symbol

MAXMIN

Set the Domestic Hot Water temperature 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 automatically 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

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 position 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 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

(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 / Thermometer

• 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. production;

EVE 05 RTN 24 open boiler, with electronic ignition, for heating only;

EVE 05 CTFS 24 F forced draught room sealed boiler, with electronic ignition and instantaneous D.H.W. production;

EVE 05 RTFS 24 forced draught room sealed boiler, with electronic ignition for heating only;

EVE 05 CTN 24 open boiler, with electronic ignition and instantaneous D.H.W. production with DHW plates heat exchanger

EVE 05 CTFS 24 forced draught room sealed boiler with electronic ignition and instantaneous 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 force. 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 production (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

CFG

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 R1M

14 15

17 18

12 13

CF G

16 17

19 20

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

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

12 13

14 15

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

8 9

13 14

16 17 18

FG RM

General info

fig. 7

EVE 05 CTN 24

EVE 05 CTFS 24

fig. 6

13 14

15 16

2425

2526

13 14

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

24 10,17 90,57 89,76 92,60 87,14 2 92,85 90,83 2,38 - 2,28 86,7 14,11-20,03 117,89 2,9-5,1 152,4 2 9,17 - 7,15 0,831

RTFS 24

24,2 9,9 91,34 89,77 89,93 87,15 2 92,71 87,81 1,7-1,37 116,7 13,41-15,1 60,86 3,0-7,0 184,4 2 12,19-7,29 0,405

CTN 24 F

24 10,17 90,57 89,76 92,60 87,14 2 92,85 90,83 2,38 - 2,28 86,7 14,11-20,03 117,89 2,9-5,1 152,4 2 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

24 10,17 90,57 89,76 92,60 87,14 2 92,85 90,83 2,38-2,28 86,7 14,11-20,03 117,89 2,9-5,1 152,4 2 9,17-7,15 0,831

RTN 24

2H3P

7,3 0,7 3 3,5 78 45 6 1 137,9

230/50 3,15 96 X4D 28 31

CTN 24 F

2H3P

7,3 0,7 3 3,5 78 45 6 1 137,9 2,5 0,5 6 11,5 12 7,6 8,6 9,8 11,4 13,7 35 - 57 230/50 3,15 96 X4D 30 33

CTFS 24 F

2H3P

7,10 0,7 3 3,5 78 45 6 1 137,9 2,5 0,5 6 11,5 12 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 3,5 78 45 6 1 137,9

230/50 3,15 130 X4D 34,5 37,5

CTN 24

2H3P

7,3 0,7 3 3,5 78 45 6 1 137,9 2,5 0,5 6 11,5 12 7,6 8,6 9,8 11,4 13,7 35 - 57 230/50 3,15 98 X4D 32 35

EVE 05

CTFS 24

2H3P

7,10 0,7 3 3,5 78 45 6 1 137,9 2,5 0,5 6 11,5 12 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 2 92,71 87,81 1,7-1,37 116,7 13,41-15,1 60,86 3,0-7,0 184,4 2 12,19-7,29 0,405

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

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

NOX class

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

Flue losses with burner off

For the following data: Nozzle - Burner pressure - Diaphragm (where applicable) - Inputs - Gas consumptions refer to pagraph SUIT ABILITY T O 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 intact.

750

430

330

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

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 animals or damage to property resulting from non-observance of the above.

DIRECTIONS FOR INSTALLER

2.1 - DIRECTIONS FOR

INSTALLER

EVE 05 is a gas boiler which must be installed in accordance with the latest regulations or rules in force. For the boiler category, which changes according to the destination country, see page 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 “MOUNTING JIG” with which the pipes for connection to the system, D.H.W. and gas can be positioned when the hydraulic system is being laid out and before the boiler is installed. This MOUNTING JIG, comprising a sheet of strong paper which must be fixed to the wall chosen for the installation of the boiler, gives all the indications needed to make the holes in the wall using two screws with expanding dowels. Use the lower part of the MOUNTING JIG to mark the exact point of the connection of the gas supply, cold water supply pipe, D.H.W. outlet, C.H. flow and return.

When choosing the position of the boiler:

- refer to the indications given in the section “Flue gas evacuation system “.

- leave a clearance of 50 mm on each side of the boiler to facilitate maintenance operations.

- Leave a 200 mm free space under the boiler in order to allow the possible verification 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 appliances which might affect operation when in use (cookers which produce greasy steam, washing machines, etc.)

- avoid installing natural draught boilers in corrosive or very dusty atmospheres such as hairdressers’, laundrettes, etc. as the life of the boiler components could be significantly shortened.

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

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

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 pipes to remove all traces of metal resulting from processing and welding operations as well as any oil and grease which could damage the boiler or jeopardize its operation.

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

- fit the boiler onto the support hooks;

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 above.

- 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 particularly:

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 outwards) or an indirect ventilation (i.e. with ventilation openings facing an adjacent room) provided that the following requirements are complied with:

Direct ventilation:

- The room has to have a ventilation opening 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 possible to the floor.

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

- A correct ventilation can be optained also through the addition of more openings, provided the addition of the different sections is not less than that really needed.

connection duct to the draught diverter.

- starting from the draught diverter, the duct must have a vertical section with a length more than twice the diameter, before getting into the chimney.

2.2.5 - FLUE GAS DISCHARGE SYSTEM

NATURAL DRAUGHT OPEN FLUE BOILERS

Connection to the chimney

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

- it must be made from waterproof material

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

- it must have sufficient mechanical strength and low thermal conductivity;

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

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

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

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

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

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

Indirect ventilation

In case it is not possible to make a room ventilation opening on an external wall, it is possible to have an indirect ventilation, sucting the air from an adjacent room, making an opening in the lowest part of a door. This solution is possible only if:

- The adjacent room is not a bed room

- The adjacent room is not a common part of the building and is not a room with fire danger (e.g. a fuel deposit, a garage, etc..)

FORCED DRAUGHT ROOM SEALED BOILER (TYPE C12 - C32 - C42 - C52 - C62 - C82) The 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 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 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 established 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 atmosphere using a duct, which goes through the outside walls of the building, connected to a flue exhaust terminal. The exhaust duct must also comply with the following requirements:

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

- for boilers with vertical discharge, such as boilers 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 building must be sealed and the part facing outwards must be open;

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

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

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 anomaly 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 incorrect 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 areas with different pressure. The dual ducts must not be located on two opposite walls.

C62 Boiler that has to be connected to a

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

C82 Boiler designed for connection to an air

supply terminal and fitted to an individual or shared chimney.

The chimney must comply with relevant applicable law provisions.

B22 Boiler designed for connection to an

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

Note: type B22

is not approved by

Turkish market.

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 adaptor (see fig. 13).

The maximum allowed length for a smoke pipe of 80 mm dia. is 20 m, included a wide radium curve and one smoke terminal.

For this type of installation the chimney has to serve just one boiler, i.e. the boiler must have its indipendent smoke 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 vertical wall or in a chimney.

WARNING: For the smoke outlet configuration (see fig. 13-

14) it is necessary to close 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

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 excluding 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 boiler must be inserted in the flue gas exhaust pipe as shown in figure 15, for installations with horizontal coaxial pipe up to 1 m and with vertical coaxial pipe up to 2 m.

VERTICAL FLUE DUCT WITH COAXIAL DUCT Ø 80/125

Tipo C32 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 excluding 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 boiler must be inserted in the flue gas exhaust pipe, as shown in figure 16, for installations with a coaxial pipe up to 2,5 m.

Fitting of the diaphragm Ø 42

Closing cover with gasket in neoprene

WARNING: For the smoke outlet configuration (see fig. 15-

16) it is necessary to close the holes of air entry ''1-2'' with the provided for closing covers and the gaskets delivered 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 terminals 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 inside 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 necessary to foresee a convenient insulation of such a duct. The flue duct, during the operation of the boiler can reach temperatures higher than 120°C.

IMPORTANT Flue gas pressure switch operation

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

This situation is indicated by the failure led

lighting on the display; by pressing the reset push-button the failure code “AF” is displayed 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 smoke outlet configuration (see fig. 18) it is necessary to close 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 SEP ARA TE 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 discharges through original UNICAL non-flexible and smooth ducts.

Example N.2

Primary air suction from perimeter wall and flue gas discharge from the same outside perimeter 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 following measurements must be made:

- the combustion air temperature measured

in hole 2 (see fig. 22).

- the flue gas temperature and CO2 % mea-

sured in hole 1 (see fig. 22).

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

Air inlet

Smoke outlet

Analyser probe

Installation info

2.2.13 - HYDRAULIC CONNECTION

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

Note: The use of solvents could damage

the components of the heating circuit.

Basing on the feeding water hardness, it has to be considered the opportunity to install appropriate devices for

POSITION By-Pass CLOSE

POSITION By-Pass OPEN

ADJUST By-Pass

By-Pass ADJUSTMENT SCREW CTN 24 - CTFS 24

fig. 24

INSTALLA TION WITH BENDED PIPES (00361193 kit pipes)

INSTALLA TION WITH V AL VES (00360682 + 00361193)

INSTALLA TION 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 treatment.

2.2.12 - CONNECTION TO THE GAS

MAINS

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

- Opening of the gas gate valve and venting of the air contained in the piping and appliances, proceding appliance by appliance.

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

pliances Off, that there are no gas leaks. During the 2nd quarter of a hour from the beginning of the test no pressure reduction is to be detected on the gas pressure gauge. If gas leaks have to be found, use only water soap solution or any other specific gas leak detector which can be available on the market. Never look for gas leaks using a 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 suitable for hemp, teflon strip or similar materials

HEATING

The heating flow and return must be connected 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 guarantees always minimum flow rate through the heat exchanger, also in the case, for instance, that all the thermostatic valves fitted 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 possible 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 conveyed into the sewer.

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

UNICAL shall not be held responsible for 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 positioning, 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 purposes must be checked; in case of doubt, ask for a professionally qualified technician to check the electrical system. UNICAL disclaims all liability for damage or injury caused by failure to earth the system properly.

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

The boiler is supplied with 1.5 m long 3 x 0.75 mm² cord. A double pole switch with a distance between the contacts higher than 3 mm, must be installed upstream the boiler to enable all maintenance operations to be carried out safely.

Access to the electrical terminal strip

- WARNING! Switch off the electrical supply

- 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 replaced, 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 attempt 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 micr oswi tc h

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 THER MOSTAT

TF – FLUE GAS SPILLAGE THERMOSTAT

TL – HIGH LIMIT THERMOSTAT

PV – FAN PRESSURE SWITCH

TL – HIGH LIMIT THERMOSTAT

FL = Flow switch

SS = DHW sen sor

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

- the flue gas exhaust duct and its terminal

are installed correctly: when the boiler

FILLING TAP

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

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

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

- any gate valves taps of the system are open;

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

ration must be performed by qualified technicians;

- the gas supply tap is open;

- there are no gas leaks;

- the external mains switch is on;

- the boiler’s safety valve is not locked;

- there are no water leaks.

SWITCHING ON AND OFF

To switch on and off the boiler follow the indications in the “Users’ Instructions”.

Filling position

fig. 26

Normal position

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 installed in the system;

- close the air vents on the radiators as

soon as water comes out;

- use the pressure gauge on the boiler to

check that the pressure has reached the value of 0.8/1bar;

- close the water inlet tap and then release

the air again through the radiator air vents;

- after switching on the boiler and after the

system has reached the correct temperature, stop the pump and repeat the air relief operations;

- let the system cool down and then adjust

the water pressure to 0.8/1 bar.

WARNING

NB: After a given period of inactivity and without electrical supply the pump could be

blocked. Before switching on the boiler it is important to restart the pump as follows: loosen the protection screw in the centre of the pump motor, insert a screwdriver in the hole and then manually rotate the pump shaft clockwise. Once the pump has been restarted tighten the protection screw and check that there are no water leaks.

WARNING

Once the protection screw has been removed a little water may leak out. Before replacing the casing of the boiler dry any wet surfaces.

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 following changes in the type of gas or adaptation 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: blinking – 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 modulating 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 corresponds 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 pressure decreases

GAS VALVE

CHIMNEYSWEEPER ACTIVATION

OPERATION AT THE MAXIMUM CAPACITY

OPERATION A T THE MINIMUM CAPACITY

Push the reset push button for 3 seconds

Push again the reset push button; the symbol “F” (Central Heating) blinks, the symbol “L” (burner in operation) is fixed.

Push again the reset push button; the symbol “F” (Central 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 = Adjustment nut (10 mm) for maximum pressure

3) Ending of basic adjustings

- check the minimum and maximum pressure 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 performed by qualified technicians who will use the kits supplied by Unical and perform the conversion and required adjustments for correct preparation of the boiler for use. To convert the boiler from one type of gas to another proceed as follows:

for conversion from natural gas to LPG

- remove the main burner;

- disassemble injectors of the main burner

and replace them with those with a diameter corresponding to the new type of gas (see table “INJECTORS - PRESSURES”);

- reassemble the main burner;

- position the jumper on the modulation PCB

in the panel board as shown in fig. 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 - PRESSURES”) and adjust the pressure of the burner as indicated in section “ADJUSTING THE BURNER”

- check that the burner is functioning pro-

perly;

- check that there are no gas leaks.

- tighten the plug ”A” (fig.28) of the max

pressure adjustment screw

- when the conversion is completed, fill in

the label supplied in the kit with the information required and stick it onto the boiler alongside the data plate.

for conversion from LPG to natural gas

- remove the main burner;

- disassemble injectors of the main burner and replace them with those with a diameter corresponding to the new type of gas (see table “INJECTORS - PRESSURES”);

- reassemble the main burner;

- position the jumper on the modulation PCB in the panel board as shown in figure 31;

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

- check the pressure value upstream the gas valve (see table “INJECTORS - PRESSURES”) and adjust the burner pressure as indicated in section “ADJUSTING THE BURNER”;

- check that the burner is functioning properly;

- check that there are no gas leaks.

- tighten the plug “A” (fig.28) of the max pressure adjustment screw;

- when the conversion is completed, fill in the label supplied in the kit with the information 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 1 1)

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 position – – it indicates that the boiler is working only for domestic hot water production and that the temperature can be adjusted turning knob ''C''.

If the knob is set within the range indicated by the arrow on the illustration it means that the boiler always gives priority to the production 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 (C) (Only for EVE 05 CTN 24 F - EVE CTFS 24/28 F)

If the knob is set within the range 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

F G

°C

MAX

MAXMIN

EVE

°C

MAX

MAXMIN

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 normal operation after 15 minutes.

3.2 SWITCHING ON / OFF

For the operation of the boiler in WINTER mode, the knob “B” pointer must be positioned 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 adjustment 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 inactivity period of the boiler is expected.

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 intervention, due to:

- lack of gas

- not detected ignition In the first case, no ignition occurs: verify that the gas feeding is present. In the second case, check the ignition electrode and the connections 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 identifying 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 temperature of the boiler water drops below 6°C: the burner is automatically switched on and the pump started until the temperature of the water in the boiler reaches 16°C.

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

Do not use the anti-freeze products for car's engines because they can damage the 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 heating sensor is under 2 °C, the boiler's operation is automatically inhibited until the temperature 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 property.

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

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

- Ascertain that the gas cock is open and that

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

- If so, wait one minute before resetting the

boiler by depressing the L push button. If the boiler does not start and goes into lockout position after three times, (just once if is operated 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 because the boiler’s PCB has an anti-jamming programme. In this case the pump goes into operation for a 5 seconds every 24 hour of inactivity.

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 operational 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 pressure could rise, resulting in the safety valve opening 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 RTN 24, EVE 05 CTN 24 F, EVE 05 CTFS 24 F, EVE 05 CTN 24, EVE 05 CTFS 24 Installation, Use And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual