Baxi ECO 3 Instructions Manual

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Page 1

Caldera mural de gas de alto rendimiento

Manual para el usuario y el instalador

Centrală murală cu gaz, de înalt randament

Manual de instrucţiuni destinat utilizatorului şi instalatorului

Magas hozamú fali gázkazán

Felhasználói és szerelői kézikönyv

Высокопроизводительный настенный газовый котел

Руководство по эксплуатации и монтажу

High efﬁciency wall-mounted gas-ﬁred boilers

Instructions for Users and Installers

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE USER

1. Instructions prior to installation 3

2. Instructions prior to commissioning 3

3. Commissioning of the boiler 4

4. DHW temperature adjustment 4

5. Room temperature adjustment 5

6. Filling the boiler 5

7. Turning off the boiler 5

8. Gas change 5

9. Prolonged standstill of the system. Frost protection 6

10. Safety device indicators - activation 6

11. Servicing instructions 6

12. General information 7

13. Instructions prior to installation 7

14. Boiler installation 8

15. Boiler size 8

16. Installation of ue and air ducts 9

17. Connecting the mains supply 13

18. Fitting a room thermostat 13

19. Gas change modalities 14

20. Displaying electronic control card parameters on the boiler display (“INFO” mode) 16

21. Control and operation devices 17

22. Electronic board calibration 18

23. Positioning of the ignition and ame sensing electrode 18

24. Check of combustion parameters 18

25. Output / pump head performances 19

26. Connection of the external probe 19

27. Connection an external boiler 20

28. How to purge the DHW system from limestone deposits 21

29. How to disassemble the DHW heat exchanger 21

30. Cleaning the cold water lter 21

31. Boiler schematic 22-25

32. Illustrated wiring diagram 26-29

33. Technical data 30

CONTENTS

ISTRUCTIONS PERTAINING TO THE USER

ISTRUCTIONS PERTAINING TO THE INSTALLER

Dear Customer, We are sure your new boiler will comply with all your requirements. Purchasing one of the BAXI products satises your ex pec ta tions: good functioning, simplicity and ease of use. Do not dispose of this booklet without reading it: you can nd here some very useful information, which will help you to run your boiler correctly and efciently.

Do not leave any parts of the packaging (plastic bags, polystyrene, etc.) within children’s reach as they are a potential source of danger.

BAXI S.p.A. declares that these models of boiler bear the CE mark in compliance with the basic requirements of the following Directives:

- Gas Directive 90/396/EEC

- Efciency Directive 92/42/EEC

- Electromagnetic Compatibility Directive 2004/108/EEC

- Low Voltage Directive 2006/95/EC

BAXI S.p.A., a leading European manufacturer of hi-tech boilers and heating systems, has developed CSQ-certied quality management (ISO 9001), environmental (ISO 14001) and health and safety (OHSAS 18001) systems. This means that BAXI S.p.A. includes among its objectives the safeguard of the environment, the reliability and quality of its products, and the health and safety of its employees. Through its organisation, the company is constantly committed to implementing and improving these aspects in favour of customer satisfaction.

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE USER

This boiler is designed to heat water at a lower than boiling temperature at atmospheric pressure. The boiler must be connected to a central heating system and to a domestic hot water supply system in compliance with its performances and output power. Have the boiler installed by a Qualied Service Engineer and ensure the following operations are accomplished:

a) careful checking that the boiler is t for operation with the type of gas available. For more details see the notice on the

packaging and the label on the appliance itself.

b) careful checking that the ue terminal draft is appropriate; that the terminal is not obstructed and that no other appliance

exhaust gases are expelled through the same ue duct, unless the ue is especially designed to collect the exhaust gas coming from more than one appliance, in conformity with the laws and regulations in force.

c) careful checking that, in case the ue has been connected to pre-existing ue ducts, thorough cleaning has been carried

out in that residual combustion products may come off during operation of the boiler and obstruct the ue duct.

d) to ensure correct operation of the appliance and avoid invalidating the guarantee, observe the following precautions:

1. Hot water circuit:

1.1. If the water hardness is greater than 20 °F (1 °F = 10 mg calcium carbonate per litre of water) a polyphosphate or

comparable treatment system responding to current regulations.

1.2. Domestic Hot Water circuit must be thoroughly ushed after the installation of the appliance and before its use.

1.3. The materials used for the domestic hot water circuit of the product comply with Directive 98/83/EC.

2. Heating circuit

2.1. new system Before proceeding with installation of the boiler, the system must be cleaned and ushed out thoroughly to eliminate

residual thread-cutting swarf, solder and solvents if any, using suitable proprietary products.

To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non alkaline. The

recommended products for cleaning are:

SENTINEL X300 or X400 and FERNOX heating circuit restore. To use this product proceeding strictly in accordance

with the maker’s directions.

2.2. existing system

Before proceeding with installation of the boiler, the system must be cleaned and ushed out to remove sludge

and contaminants, using suitable proprietary products as described in section 2.1.

To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such

as SENTINEL X100 and FERNOX heating circuit protective. To use this product proceeding strictly in accordance with the maker’s directions.

Remember that the presence of foreign matter in the heating system can adversely affect the operation of the

boiler (e.g. overheating and noisy operation of the heat exchanger).

Failure to observe the above will render the guarantee null and void.

1. INSTRUCTIONS PRIOR TO INSTALLATION

Initial lighting of the boiler must be carried out by a licensed technician. Ensure the following operations are carried out: a) compliance of boiler parameters with (electricity, water, gas) supply systems settings. b) compliance of installation with the laws and regulations in force. c) appropriate connection to the power supply and grounding of the appliance. Failure to observe the above will render the guarantee null and void. Prior to commissioning remove the protective plastic coating from the unit. Do not use any tools or abrasive detergents as you may spoil the painted surfaces.

The instructions shall state the substance of the following: This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

2. INSTRUCTIONS PRIOR TO COMMISSIONING

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE USER

To correctly light the burner proceed as follows:

1) provide power supply to the boiler;

2) open the gas cock;

3) turn the selector switch (Figure 2) to set the boiler on summertime ( ) or wintertime ( ) operation;

4) turn the central heating (2) and domestic hot water (1) adjusting controls in order to light the main burner. To increase temperature values turn the control clockwise and anti clockwise to decrease it. When on summertime operation ( ) the main burner and the pump will start running only when there is a call for hot

water.

3. COMMISSIONING OF THE BOILER

Figure 2

0503_1109/CG1659

Reset Winter OFF Summer

Summer / Winter / Reset / OFF selector positions

4. DHW TEMPERATURE ADJUSTMENT

The gas valve is provided with an electronic ame-modulating function, which operates depending on the DHW temperature adjusting control (1) settings and on the quantity of water drawn from the taps. This electronic device allows to keep the water coming out of the boiler at a constant temperature also when small quantities of water are drawn. During a domestic ho water request, the display shows a domestic hot water (D.H.W.) temperature. To increase temperature values turn the control clockwise and anticlockwise to decrease it.

LEGEND:

Operating in Central Heating mode (CH)

Flame present (burner switch on)

Loss of ame (burner off)

Operating in Domestic Hot Water mode (D.H.W.)

Generic ERROR

Water pressure LOW

Numeric signalling (temperature, error codes, etc)

RESET

Figure 1

3 4

Domestic hot water (D.H.W.) control knob

Central heating (C.H.) control knob

Warning: During initial lighting, until the air contained in the gas pipes is not released, the burner may fail to light immediately and that may cause a ‘blockage’ of the boiler. Under such circumstances we recommend you repeat the ignition procedure until gas is delivered to the burner, and set knob to (

- RESET) for at least 2 second.

Selector (gure 2)

Display

0605_2201 / CG_1805

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE USER

5. ROOM TEMPERATURE ADJUSTMENT

The system must be equipped with a room thermostat (see the relevant regulations) to control the temperature in the rooms. In case there is no room thermostat, during initial lighting, it will be possible to control the room temperature by turning control (2). During a central heating mode, the display shows a central heating (C.H.) ow temperature. To increase temperature values turn the control clockwise and anticlockwise to decrease it. Electronic modulation of the ame will enable the boiler to reach the set temperature by adapting the gas supply to the burner to the actual heat exchange demand.

Important: Regularly check that the pressure displayed by the pressure gauge is 0.7 to 1.5 bar, with boiler not operating. In case of overpressure, open the boiler drain valve (Figure 3). In case the pressure is lower open the boiler lling tap (Figure 3). We recommend you open the tap very slowly in order to let off the air. During this operation, the Summer/Winter selector (Figure 2) must be in the OFF position (0).

NOTE: In case pressure drops occur frequently have the boiler checked by a Qualiﬁed Service Engineer.

6. FILLING THE BOILER

The boiler is supplied with a hydraulic pressure sensor, which blocks the boiler in case water is lacking.

The electric supply to the boiler must be removed in order to switch it off. With the selector in O position (off – gure 2), the gas boiler remain switched off, the display (4 – gure 1) reads out “OFF” but the main board is still supplied and the Frost protection function is activated.

NOTE: with the selector in “0” position and external probe connected, the display carries out the actual value of

the external temperature.

7. TURNING OFF THE BOILER

8. GAS CHANGE

These boilers set for natural gas can be converted to work with LPG. Any gas change must be effected by a Qualied Service Engineer.

Figure 3

0603_1302/CG_1791

Filling tap

Drain point

Manometer

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE USER

10. SAFETY DEVICE INDICATORS - ACTIVATION

We recommend you avoid draining the whole system as water replacements engender purposeless and harmful limestone deposits inside the boiler and on the heating elements. In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we suggest you add some specic-purpose anti-freeze to the water contained in the system (e.g.: propylene glycole coupled with corrosion and scaling inhibitors). The electronic management of boilers includes a “frost protection” function in the central heating system which operates the burner to reach a heating ow temperature of 30° C when the system heating ow temperature drops below 5°C. The frost protection function is enabled if: * electrical supply to the boiler is on; * the gas service cock is open; * the system pressure is as required; * the boiler is not blocked.

9. PROLONGED STANDSTILL OF THE SYSTEM. FROST PROTECTION

To RESET the gas boiler, turn selector (Figure 2) to “R” for at least 2 seconds. If the fault persists, call an authorised service centre.

Note: It is possible to carry out n° 5 relighting

attempts in a row, after which the RESET function is disabled and the gas boiler still blocked.

To carry out a new RESET attempt, turn the

selector (gure 2) in OFF position for at least 2 seconds.

NOTE: if a fault occurs, the display reads out an error code ashing together with background light.

To maintain efcient and safe operation of your boiler have it checked by a Qualied Service Engineer at the end of every operating period. Careful servicing will ensure economical operation of the system. Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily ammable cleaners (i.e.: gasoline, alcohol, and so on). Always isolate the electrical supply to the appliance before cleaning it (see section 7 “Turning off the boiler”).

11. SERVICING INSTRUCTIONS

If a fault occurs, the display reads out an error message identifying it (es. E 01):

Corrective action

Turn selector (gure 2) to “R” for at least 2 seconds. If this fault persists, call an authorised service centre. Turn selector (gure 2) to “R” for at least 2 seconds. If this fault persists, call an authorised service centre.

Call an authorised service centre.

Call an authorised service centre. Call an authorised service centre. Check that the pressure in the system is as specied. See section 6. If this fault persists, call an authorised service centre.

Call an authorised service centre.

Turn selector (gure 2) to “R” for at least 2 seconds. If this fault persists, call an authorised service centre.

Description of FAULTS

Gas supply fault

Safety thermostat sensor tripped

Flue thermostat sensor tripped / Flue pressure switch tripped Central heating NTC sensor fault Domestic Hot Water NTC sensor fault

Water pressure LOW

Boiler max temperature exceeded(probable pump jammed)

Fault ame (parasitic ame)

Error code

E01

E02

E03

E05 E06

E10

E25

E35

Figure 4

0607_1205

RESETTING

ERRORS

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

a) careful checking that the boiler is t for operation with the type of gas available. For more details see the notice on the

packaging and the label on the appliance itself.

b) careful checking that the ue terminal draft is appropriate; that the terminal is not obstructed and that no other appliance

c) careful checking that, in case the ue has been connected to pre-existing ue ducts, thorough cleaning has been carried

out in that residual combustion products may come off during operation of the boiler and obstruct the ue duct.

To ensure correct operation of the appliance and avoid invalidating the guarantee, observe the following precautions:

1. Hot water circuit:

1.1. If the water hardness is greater than 20 °F (1 °F = 10 mg calcium carbonate per litre of water) a polyphosphate or

comparable treatment system responding to current regulations.

1.2.

Domestic Hot Water circuit must be thoroughly ushed after the installation of the appliance and before its use.

1.3. The materials used for the domestic hot water circuit of the product comply with Directive 98/83/EC.

2. Heating circuit

2.1. new system Before proceeding with installation of the boiler, the system must be cleaned and ushed out thoroughly to eliminate

residual thread-cutting swarf, solder and solvents if any, using suitable proprietary products.

To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non alkaline. The

recommended products for cleaning are:

SENTINEL X300 or X400 and FERNOX heating circuit restore. To use this product proceeding strictly in accordance

with the maker’s directions.

2.2. existing system

Before proceeding with installation of the boiler, the system must be cleaned and ushed out to remove sludge

and contaminants, using suitable proprietary products as described in section 2.1.

To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such

as SENTINEL X100 and FERNOX heating circuit protective. To use this product proceeding strictly in accordance with the maker’s directions.

Remember that the presence of foreign matter in the heating system can adversely affect the operation of the

boiler (e.g. overheating and noisy operation of the heat exchanger).

Failure to observe the above will render the guarantee null and void.

Warning: When the selector switch (gure 2) is set on Wintertime operation ( ), it may be necessary to wait some minutes

for the relight of the boiler, at each intervention of the central heating temperature adjusting control (2-gura 1).

No waiting is needed when the boiler is in the DHW mode on models with this option.

To relight the main burner immediately place the selector switch (gure 2) on 0 position and then again on ( ) position.

The following remarks and instructions are addressed to Service Engineers to help them carry out a faultless installation. Instructions regarding lighting and operation of the boiler are contained in the ‘Instructions pertaining to the user’ section. Note that installation, maintenance and operation of the domestic gas appliances must be performed exclusively by qualied personnel in compliance with current standards. Please note the following: * This boiler can be connected to any type of double- or single feeding pipe convector plates, radiators, thermoconvec-

tors. Design the system sections as usual though taking into account the available output / pump head performances, as shown in section 26.

* Do not leave any packaging components (plastic bags, polystyrene, etc.) within children’s reach as they are a potential

source of danger. * Initial lighting of the boiler must be effected by a Qualied Service Engineer. Failure to observe the above will render the guarantee null and void.

12. GENERAL INFORMATION

13. INSTRUCTIONS PRIOR TO INSTALLATION

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

14. BOILER INSTALLATION

Decide upon the boiler location, then tape the template on the wall. Connect the pipework to the gas and water inlets prearranged on the template lower bar. We suggest you t two G3/4 stop cocks (available on demand) on the central heating system ow and return pipework; the cocks will allow to carry out important operations on the system without draining it completely. If you are either installing the boiler on a pre-existent system or substituting it, we suggest you also t settling tank on the system return pipework and under the boiler to collect the deposits and scaling which may remain and be circulated in the system after the purge. When the boiler is xed on the template connect the ue and air ducts (ttings supplied by the manufacturer) according to the instructions given in the following sections. When installing the 240 i - 1.240 i models (boilers with natural draught), make the connection to the ue using a metal pipe which will provide resistance over time to the normal mechanical stresses, heat and the effects of the combustion products and any condensation they form.

15. BOILER SIZE

Figure 6

Figure 5

BOILER CONNECTION POINTS

BOILER HEIGHT 780

0512_0504/CG1769

0512_0505/CG1769

: G3/4 heating ow / return

: G1/2 domestic hot water inlet / outlet

: G3/4 gas inlet to the boiler

minimo

0606_2602

0606_2603

: G3/4 heating ow / return

: Filling the system G 1/2

G3/4 gas inlet to the boiler

240 i - 240 Fi1.240 i - 1.240 Fi

240 i - 1. 240 i 240 Fi - 1. 240 Fi

0710_2501 / CG1769

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

16. INSTALLATION OF FLUE AND AIR DUCTS

Models 240 Fi - 1.240 Fi

We guarantee ease and exibility of instal lation for a gasred forced draught boiler thanks to the ttings and xtures supplied (described below). The boiler is especially designed for connection to an exhaust ue / air ducting, with either coaxial, vertical or horizontal terminal. By means of a splitting kit a two-pipe system may also be installed.

Exclusively install ﬁttings supplied by the manufacturer.

WARNING : To guarantee more operating insurance it is necessary to assure the ﬂue pipes to the wall using the apposite clamps.

Figure 7

0503_0905/CG1638

Figure 8

… COAXIAL FLUE - AIR DUCT (CONCENTRIC)

This type of duct allows to disengage exhaust gases and to draw combustion air both outside the building and in case a LAS ue is tted. The 90° coaxial bend allows to connect the boiler to a ue-air duct in any direction as it can rotate by 360°. It can moreover be used as a supplementary bend and be coupled with a coaxial duct or a 45° bend.

0511_2701/CG1750

If the ue outlet is placed outside, the ue-air ducting must protrude at least 18mm out of the wall to allow alluminium weathering tile to be tted and sealed to avoid water leakages. Ensure a minimum downward slope of 1 cm towards the outside per each metre of duct length.

•

A 90° bend reduces the total duct length by 1 metre.

•

A 45° bend reduces the total duct length by 0.5 me-

tre.

The ﬁrst 90° bend is not included in the maximum available length.

Securing clamp

Concentric outlet

Boiler model

240 Fi

1.240 Fi

280 Fi

0 ÷ 1 1 ÷ 2 2 ÷ 5 0 ÷ 1 1 ÷ 2 2 ÷ 4

Length (m)

Air suction

RESTRICTOR

Yes

No No

Yes

Flue

RESTRICTOR

Yes

No No

Yes

No No

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

16.1 HORIZONTAL FLUE TERMINAL INSTALLATION OPTIONS

0503_0907/CG1640

16.2 LAS FLUE DUCT INSTALLATION OPTIONS

16.3 VERTICAL FLUE TERMINAL INSTALLATION OPTIONS

This type of installation can be carried out both on a at or pitched roof by tting a terminal, an appropriate weathering tile and sleeve, (supplementary ttings supplied on demand).

0503_0908/CG1641

0512_2001

For detailed instructions concerning the installation of ttings refer to the technical data accompanying the ttings.

L max = 5 m 240 Fi Ø 60/100 mm - 9 m Ø 80/120 mm L max = 4 m 280 Fi Ø 60/100 mm

L max = 4 m 240 Fi Ø 60/100 mm - 8 m Ø 80/120 mm L max = 3 m 280 Fi Ø 60/100 mm

L max = 4 m Ø 60/100 mm L max = 10 m Ø 80/120 mm

L max = 2 m Ø 60/100 mm L max = 8 m Ø 80/120 mm

L max = 3 m Ø 60/100 mm L max = 9 m Ø 80/120 mm

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924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

… SEPARATED FLUE-AIR DUCTING

This type of ducting allows to disengage exhaust ue gases both outside the building and into single ue ducts. Comburant air may be drawn in at a different site from where the ue terminal is located. The splitting kit consists of a ue duct adaptor (100/80) and of an air duct adaptor. For the air duct adaptor t the screws and seals previously removed from the cap.

The restrictor must be removed in the following cases

Figure 9

0604/2301/CG1776

Split ﬂue air control adjustment

The adjustment of this control is required to optimise performance and combustion parameters. The air suction coupling can be rotated to adjust excess air according to the total length of the ue and intake ducts for the combustion air. Turn this control to increase or decrease excess combustion air (gure 9):

To improve optimisation a combustion product analyser can be used to measure the CO

contents of the ue at maximum heat output, gradually adjusting air to obtain the CO

reading in the table below, if the analysis shows a lower value. To properly install this device, also refer to the technical data accompanying the tting.

Flue duct adaptor

Seal

Air suction coupling adjust

Index

Opening

The 90° bend allows to connect the boiler to ue-air ducting regardless of direction as it can be rotated by 360°. It can moreover be used as a supplementary bend to be coupled with the duct or with a 45° bend.

• A 90° bend reduces the total duct length by 0.5 metre.

• A 45° bend reduces the total duct length by 0.25 metre.

The ﬁrst 90° bend is not included in the maximum available length.

Boiler

model

240 Fi

1.240 Fi

280 Fi

0 ÷ 4

4 ÷ 15 15 ÷ 25 25 ÷ 40

0 ÷ 2

2 ÷ 10 10 ÷ 25

(L1+L2)

Air suction

copupling

position

3 1 2 3 1 2 3

Flue

RESTRICTOR

Yes

CO2 %

G20

6,4

7,4

G31

7,3

8,4

Page 12

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

0503_2201/CG1643

16.5 SEPARATED HORIZONTAL FLUE TERMINALS INSTALLATION OPTIONS

IMPORTANT: Ensure a minimum downward slope of 1 cm toward the outside per each metre of duct length. In the event of installation of the condensate collection kit, the angle of the drain duct must be directed towards the boiler.

NB: For C52 types, terminals for combustion air suction and combustion product extraction must never be tted on op-

posite walls of the building.

The maximum length of the suction duct for type C52 must be 10 metres.

If the ue duct exceeds 6 m, the condensate collection kit (supplied as an accessory) must be tted close to the boiler.

16.4 SPLIT FLUE OVERALL DIMENSIONS

0504_1806/CG_1794

0503_0911/CG1644

L max = 15 m 240 Fi L max = 12 m 280 Fi

L max = 14 m 240 Fi L max = 10 m 280 Fi

16.6 SEPARATED VERTICAL FLUE TERMINALS INSTALLATION OPTIONS

(L1 + L2) max = 40 m 240 Fi (L1 + L2) max = 25 m 280 Fi

L max = 10 m 240 Fi L max = 8 m 280 Fi

Page 13

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

17. COnnECtInG tHE MaInS SUpply

Electrical safety of the appliance is only guaranteed by correct grounding, in compliance with the applicable laws and regulations. Connect the boiler to a 230V monophase + ground power supply by means of the three-pin cable supplied with it and make sure you connect polarities correctly. Use a double-pole switch with a contact separation of at least 3mm in both poles. In case you replace the power supply cable t a HAR H05 VV-F’ 3x0.75mm

cable with an 8mm diameter max.

…access to the power supply terminal block

• isolate the electrical supply to the boiler by the double-pole switch;

• unscrew the two screws securing the control board to the boiler;

• rotate the control board;

• unscrew the lid and gain access to the wiring (Figure 10).

Important: if tting a single exhaust ue duct, ensure it is adequately insulated (e.g.: with glass wool) wherever the duct passes through building walls. For detailed instructions concerning the installation of ttings refer to the technical data accompanying the ttings.

Figure 10

18. fIttInG a ROOM tHERMOStat

• gain access to the power supply terminal block (Figure 10) as described in the previous section;

• remove the jumper placed on terminals (1) and (2);

• insert the duplex cable through the core hitch and connect it to the two terminals.

A 2A fast-blowing fuse is in cor po rated in the power supply terminal block (to check or replace the fuse, pull out the black fuse carrier).

IMPORTANT: be sure to connect polarities correctly L (LIVE) - N (NEUTRAL).

(L) = Live (brown) (N) = Neutral (blue)

= Ground (yellow/green)

(1) (2) =

Room thermostat terminals

0607_2301 / CG_1806

TERMINAL BLOCK M1

Page 14

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

A Qualied Service Engineer may adapt this boiler to operate with natural gas (G. 20) or with liquid gas (G. 31).

The procedure for calibrating the pressure regulator may vary according to the type of gas valve tted (

HONEY WELL or

SIT; see gure 12).

Carry out the following ope rations in the given sequence:

A) substitute the main burner injectors; B) change the modulator voltage; C) proceed with a new max. and min. setting of the pressure adjusting device.

A) Substitute the main burner injectors

• carefully pull the main burner off its seat;

• substitute the main burner injectors and make sure you tighten them to avoid leakage. The nozzle diameters are spe-

cied in table 2.

B) Change the modulator voltage

• remove the 2 screws securing the control board cover and hinge it upward;

• set the jumper or the switch, according to the type of gas used, as described in the chapter 22.

C) Pressure adjusting device setting

• connect the positive pressure test point of a differential (possibly water-operated) manometer to the gas valve pressure

test point (Pb) (Figure 12); connect, for sealed chamber models only, the negative pressure test point of the manometer to a “T” tting in order to join the boiler adjusting outlet, the gas valve adjusting outlet (

Pc) and the manometer. (The

same measurement can be carried out by connecting the manometer to the pressure test point (

Pb) after removing the

sealed chamber front panel);

If you measure the pressure of burners in a different way you may obtain an altered result in that the low pressure created

in the sealed chamber by the fan would not be taken into account.

C1) Adjustment to rated output

• open the gas tap and rotate knob (Figure 12) to set the boiler to the Winter setting ( );

• open a hot water tap to reach a minimum 10 l/minute ow rate or ensure that maximum heating requirements are set;

• remove the modulator cover;

• adjust the tube brass screw (a) Fig. 13 to obtain the pressure settings shown at table 1;

• check that boiler feeding dynamic pressure, as measured at the inlet gas valve pressure test point (Pa) (Figure 12) is

correct (37 mbar for LPG gas (G.31), 20 mbar for natural gas);

C2) Adjustment to reduced heat output

• disconnect the modulator feeding cable and unscrew the (b) Fig. 13 screw to reach the pressure setting corresponding

to reduced heat output (see table 1);

• connect the cable again;

• t the modulator cover and seal.

C3) Final checks

• apply the additional dataplate, specifying the type of gas and settings applied.

19. GaS CHanGE MOdalItIES

Figure 12

SIT valve - mod. SIGMA 845 Honeywell valve - mod. VK 4105 M

0901_1101

Page 15

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

Table of burner pressures

240 i - 1.240 i 240 Fi 280 Fi Gas used G20 G31 G20 G31 G20 G31 nozzle diameter (mm) 1,18 0,74 1,18 0,74 1,28 0,77 Burner pressure

(mbar*)

1,9 4,7 1,9 4,9 1,8 4,9

REDUCED HEAT OUTPUT

Burner pressure

(mbar*)

10,0 26 11,3 29,4 11,3 31,0

NOMINAL HEAT OUTPUT

no. of nozzles 15

* 1 mbar = 10,197 mm H2O

Table 1

Consumption 15°C-1013 mbar 240 i - 1.240 i 240 Fi 280 Fi G20 G31 G20 G31 G20 G31

Rated heat output 2,78 m3/h 2,04 kg/h 2,73 m3/h 2,00 kg/h 3,18 m3/h 2,34 kg/h Reduced heat output 1,12 m3/h 0,82 kg/h 1,12 m3/h 0,82 kg/h 1,26 m3/h 0,92 kg/h p.c.i. 34,02 MJ/m3 46,30 MJ/kg 34,02 MJ/m3 46,30 MJ/kg 34,02 MJ/m3 46,30 MJ/kg

Table 2

Page 16

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

20. DISPLAYING PARAMETERS ON THE DISPLAY (“INFO” MODE)

Proceed as follows to display boiler parameters on the front panel display:

IMPORTANT: the following operations (gure 14), it has to be carried out in fast sequence in a short time (~ 4 seconds) without making any break during the steps:

1) with the control knob ( ) in any position turns it fully anti-clockwise to the minimum value;

2) quickly turn control knob clockwise through about a 1/4 turn;

3) again turns the control knob fully anti-clockwise to it minimum value

4) then set back the control knob to it original position.

• turn the control knob ( ) to display the following informations:

A00: domestic hot water output temperature (°C); A01: outdoor temperature (in °C) with outdoor sensor probe connected; A02: the value (%) of the modulator current (100% = 230 mA NATURAL GAS - 100% = 310 mA LPG); A03: heat output (%) power range (max R); A04: central heating water output setpoint temperature (°C); A05: central heating water output temperature (°C); A07: valve (µA) of the ionization current.

Note: program lines from A06 - A08 - A09 are not used.

• “INFO” function remains active for 3 minutes. To exit “INFO” function before this time repeat the operation as described

in points 1...4 or cutting OFF the power supply to the boiler.

Note: In “INFO” mode, the display (4 - ﬁgure 1) alternates between the message “A00” and CH temperature.

Figure 14

0505_3001/CG1696

0605_2204 / CG_1808

Page 17

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

The boiler has been designed in full compliance with European reference standards and in particular is equipped with the following:

• Centralheatingtemperatureadjustmentpotentiometer( )

This potentiometer sets the central heating ow max. temperature. Its temperature range goes from 30 °C min. to 80 °C max. To

increase the temperature turn knob (2 - gure 1) clockwise and anti clock wise to decrease it.

• Domestichotwatertemperatureadjustingpotentiometer( )

This potentiometer sets the domestic hot water max. temperature. Its temperature range goes from 35 °C min. to 60 °C max according

to the water inlet ow rate.

To increase the temperature turn knob (1 - gure 1) clockwise and anticlockwise to decrease it.

Note: domestic hot water is guaranteed even if the NTC sensor is damaged. In this case, the temperature control is carried out by

the boiler ow temperature.

• Fluepressureswitchforforceddraughtmodel(240 Fi - 1.240 Fi - 280 Fi)

This switch allows the burner to switch on provided the exhaust ue duct efciency is perfect. In the event of one of the following faults:

• the ue terminal is obstructed

• the venturi is obstructed

• the fan is blocked

• the connection between the venturi and the air pressure switch is interrupted,

the boiler will stay on stand-by and the display shows out error code E03 (see table on section 10).

• Fluethermostatfornaturaldraught (models 240 i - 1.240 i)

This device has a sensor positioned on the left section of the ue extraction hood and shuts off the gas ow to the burner if the ue

duct is obstructed or in the event of draught failure. Under such conditions the boiler is blocked and the display shows E03 error (see section 10). To relight the main burner immediately, place the selector switch (gure 2) on “ ” position for at least 2 seconds.

It is forbidden to disenable this safety device

• Overheatsafetythermostat

Thanks to a sensor placed on the heating ow, this thermostat interrupts the gas ow to the burner in case the water contained in

the primary system has overheated. Under such conditions the boiler is blocked and relighting will only be possible after the cause of

the anomaly has been removed. Turn the selector (gure 2) to ( ) for at least 2 seconds to RESET normal operating conditions.

It is forbidden to disenable this safety device

• Flameionizationdetector

The ame sensing electrode, placed on the right of the burner, guarantees safety of operation in case of gas failure or incomplete

interlighting of the burner. Under such conditions the boiler is blocked.

Turn the selector (gure 2) to ( ) for at least 2 seconds to RESET normal operating conditions.

• Hydraulicpressuresensor

This device enables the main burner only to be switched on if the system pressure is over 0.5 bars.

• Pumpoverrunforcentralheatingcircuit

The electronically-controlled supplementary running of the pump lasts 180 seconds, when the boiler is in the central heating mode,

after the burner has switched off due to a room thermostat or intervention.

• Pumpoverrunfordomestichotwatercircuit

The electronic control system keeps the pump operating for 30 seconds in domestic hot water mode after the D.H.W. sensor has

switched off the burner.

• Frostprotectiondevice(centralheatinganddomestichotwatersystems)

Boilers electronic management includes a “frost protection” function in the central heating system which operates the burner to reach

a heating ow temperature of 30°C when the system heating ow temperature drops below 5 °C.

This function is enabled when the boiler is connected to electrical supply, the gas supply is on and the system pressure is as requi-

red.

• Lackofwatercirculation(probablepumpjammed)

If the water inside the primary circuit doesn’t circulate, the display shows E03 error (see section 10).

• Anti-blockpumpfunction

In the event that no heat is required (during heating and/or sanitary mode), the pump will automatically start up and operate for one

minute during the following 24 hours.

This function is operative when the boiler is powered.

• Three-wayanti-blockagevalve

In the case of no heat is request for a period of 24 hours the three way valve carries out a complete commutation. This function is operative when the boiler is powered.

• Hydraulicsafetyvalve(heatingcircuit)

This device is set to 3 bar and is used for the heating circuit.

The safety valve should be connected to a siphoned drain. Use as a means of draining the heating circuit is strictly prohibited.

21. CONTROL AND OPERATION DEVICES

Page 18

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

22. ELECTRONIC BOARD CALIBRATION

When the jumper or the switch is in the OFF position (g. 15a):

MET operation of the boiler with NATURAL gas T.Risc boiler heating temperature range 30 - 85°C T-off 150-seconds heating stand-by time

When the jumper or the switch is in the

ON position

(g. 15b):

GPL operation of the boiler with LPG T.Risc boiler heating temperature range 30 - 45°C T-off 30-seconds heating stand-by time

0503_0912/CG16450503_0913/CG1645

Figure 15b

Figure 15a

NB. Make sure that electrical power supply has been disconnected before making settings.

23. POSITIONING OF THE IGNITION AND FLAME SENSING ELECTRODE

Figure 16

9912070100

The boiler has two connection points specically designed to allow technicians to measure the combustion efciency after installation and ensure that the combustion products do not constitute a health risk. One connection point is connected to the ue gas discharge circuit, and allows monitoring of the quality of the combustion products and the combustion efciency. The other is connected to the combustion air intake circuit, allowing checking of any recycling of the combustion products in case of coaxial pipelines. The following parameters can be measured at the connection point on the ue gas circuit:

• temperature of the combustion products;

• oxygen (O2) or carbon dioxide (CO2) concentration;

• carbon monoxide (CO) concentration.

The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measurement probe to a depth of about 3 cm. The boiler has two connection points specically designed to allow technicians to measure the combustion efciency after installation and ensure that the combustion products do not constitute a health risk. One connection point is connected to the ue gas discharge circuit, and allows monitoring of the quality of the combustion products and the combustion efciency. The other is connected to the combustion air intake circuit, allowing checking of any recycling of the combustion products in case of coaxial pipelines.

24. CHECK OF COMBUSTION PARAMETERS

Page 19

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

This is a high static head pump t for installation on any type of single or double-pipe heating systems. The air vent valve incorporated in the pump allows quick venting of the heating system.

25. OUTPUT / PUMP HEAD PERFORMANCES

The following parameters can be measured at the connection point on the ue gas circuit:

• temperature of the combustion products;

• oxygen (O2) or carbon dioxide (CO2) concentration;

• carbon monoxide (CO) concentration.

The combustion air temperature must be measured at the connection point on the air intake circuit, inserting the measurement probe to a depth of about 3 cm.

For natural draught boiler models, a hole must be made in the ue gas discharge pipe at a distance from the boiler equal to twice the inside diameter of the pipe itself. The following parameters can be measured through this hole:

• temperature of the combustion products;

• oxygen (O2) or carbon dioxide (CO2) concentration;

• carbon monoxide (CO) concentration.

The combustion air temperature must be measured close to the point where the air enters the boiler. The hole, which must be made by the person in charge of operating the system when it is commissioned, must be sealed in a way which ensures that the combustion product discharge pipe is airtight during normal operation.

26. CONNECTION OF THE EXTERNAL PROBE

The boiler is prearranged for connection of an external probe (supplied as accessory). For the connection, refer to the gure 17 and the instructions supplied with the probe.

Graph 1

OUTPUT l/h

PUMP HEAD mH

Figure 17

0711_2206 / CG_1988

Connect the cable, supplied as an accessory together with the external probe, to the CN10 connector of the boiler electronic board, as illustrated in gure 17.

280 Fi

240 Fi - 240 i - 1.240 Fi - 1.240 i

0603_0303

0603_0304

Graph 2

OUTPUT l/h

PUMP HEAD mH

Page 20

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

When the external probe is connected, the heating circuit temperature control device (2 - gure 1), regulates the dispersal coefcient Kt (Figure 18). The gures below show the relation between knob position and curves. Intermediate curves may also be set.

0503_3102/CG1672

IMPORTANT: the TM delivery temperature value depends on the position of the jumper or the switch T.RISC. (section 23).

The maximum possible temperature setting is 85 or 45°C.

Figure 18

TM = Range delivery temperature Te = external temperature

0505_3002

For models 1.240 Fi - 1.240 i

IMPORTANT: jumper CN7 must be jumpered (see paragraph 32).

Connect the boiler water pipes as shown in gure 19. Remove the resistor from terminal board and connect the optional DHW priority sensor to them. Insert the sensor’s probe in the relevant hole in the boiler. Set domestic hot water temperature (5°...60 °C) using the control knob

(1 - gure 1).

27. CONNECTING AN EXTERNAL BOILER

Figure 19

0504_1404

Legend

UB DHW boiler unit UR central heating unit V3V external three way valve M2 terminal block SB DHW priority sensor MR central heating delivery MB DHW delivery RR central heating/DHW return RB resistor, to be removed

External 3 way valve connection

3 WAY VALVE AND D.K.W. PRIORITY SENSOR TERMINAL BLOCK.

Page 21

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

To clean the DHW system it is not necessary to remove the DHW heat exchanger if the assembly is equipped with the appropriate taps (supplied on demand) placed on the hot water outlet and inlet.

To carry out the purge it is necessary to:

• close the cold water inlet

• drain the DHW system from the water contained therein by means of a hot water tap

• close the DHW outlet

• unscrew the two stop cocks caps

• remove the lters.

In case the appropriate tap is not supplied it is necessary to disassemble the DHW heat exchanger, as described in the following section, and do the purge aside. We recommend you also purge from limestone deposits the DHW heat exchanger seat and the NTC sensor tted on the DHW system. To purge the exchanger and/or the DHW system we suggest the use of Cillit FFW-AL or Beckinser HF-AL.

28.

HOW TO PURGE THE DHW SYSTEM FROM LIMESTONE DEPOSITS

The stainless steel plate-type DHW heat exchanger is easily disassembled with a screwdriver by operating as described below:

• drain, if possible, only the boiler system, through the drain tap;

• drain the DHW system from water;

• remove the two screws (right in front of you) securing the DHW heat exchanger and pull it off its seat (gure 19).

29. HOW TO DISASSEMBLE THE DHW HEAT EXCHANGER

The boiler is equipped with a cold water lter placed on the hydraulic assembly. To clean it do the following:

• drain the DHW system from water;

• unscrew the nut on the ow sensing

assembly (Figure 19);

• pull out the ow sensing device and

its lter;

• remove the impurities.

Important: in the event of replacements and/or cleaning of the O-rings on the hydraulic unit, do not use oil or grease as lubricant but exclusively Molykote 111.

30. CLEANING THE COLD WATER FILTER

0606_2703 / CG_1839

ow sensing securing nut

Figure 19

DHW heat exchanger securing screws

Page 22

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

31. BOILER SCHEMATIC

240 Fi - 280 Fi

Figure 20

Key:

1 DHW priority sensor 2 automatic by-pass 3 water pressure switch 4 three way valve 5 DHW NTC sensor 6 ow sensor with lter and water ow rate limiter 7 3-way valve motor 8 gas valve 9 ignition electrode 10 central heating NTC sensor 11 overheat safety thermostat 12 ue-water exchanger 13 ue hood 14 fan

heating domestic gas domestic heating inlet water outlet water inlet return

15 air pressure switch 16 positive pressure point 17 negative pressure point 18 ame detector electrode 19 main burner 20 burner injectors 21 expansion vessel 22 plate heat exchanger (D.H.W.) 23 automatic air vent 24 pump and air separator 25 lling the system 26 boiler drain point 27 manometer 28 pressure relief valve

SEALED CHAMBER

0509_2604/CG1646

0606_2701

280 Fi

Page 23

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

Key:

14 ue thermostat 15 ame detector electrode 16 main burner 17 burner injectors 18 expansion vessel 19 plate heat exchanger (D.H.W.) 20 automatic air vent 21 pump and air separator 22 lling the system 23 boiler drain point 24 manometer 25 pressure relief valve

240 i

Figure 21

0503_0916/CG1647

heating domestic gas domestic heating inlet water outlet water inlet return

Page 24

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

Key:

1 water pressure switch 2 automatic bypass 3 gas valve 4 ignition electrode 5 central heating NTC sensor 6 overheat safety thermostat 7 ue-water exchanger 8 ue hood 9 fan 10 air pressure switch 11 positive pressure point

(Not featured on 1.140 Fi)

12 negative pressure point 13 ame detector electrode 14 main burner 15 burner injectors 16 expansion vessel 17 automatic air vent 18 pump and air separator 19 boiler drain point 20 manometer 21 pressure relief valve

1.240 Fi

Figure 22

heating gas domestic heating inlet water inlet return

SEALED CHAMBER

0509_2605/CG1654

Page 25

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

Key:

1 water pressure switch 2 automatic bypass 3 gas valve 4 ignition electrode 5 central heating NTC sensor 6 overheat safety thermostat 7 ue-water exchanger 8 ue hood 9 ue thermostat

10 ame detector electrode 11 main burner 12 burner injectors 13 expansion vessel 14 automatic air vent 15 pump and air separator 16 boiler drain point 17 manometer 18 pressure relief valve

1.240 i

Figure 23

0510_0403/CG1655

heating gas domestic heating inlet water inlet return

Page 26

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

32. ILLUSTRATED WIRING DIAGRAM

240 Fi - 280 Fi

CABLES COLOURS

C= light blue M= brown N= black R= red G/V= yellow/green B= white V= green

KEY

P2: DHW potentiometer P3: S/W/OFF selector P4: Central heating potentiometer P5: Heating power regulation trimmer

0711_2211 / CG_1801_1

FAN

PUMP

FEEDING

TERMINAL BLOCK

FEEDING

POWER

GRID

ROOM

THERMOSTAT

IGNITION

ELECTRODE

FLAME

SENSING

ELECTRODE

SAFETY

THERMOSTAT

AIR PRESSURE

SWITCH

WATER PRESSURE

SWITCH

CENTRAL HEATING

NTC SENSOR

DHW NTC

SENSOR

DHW

PRIORITY SENSOR

3-WAY VALVE

FUSE

CONNECTION FOR

EXTERNAL SENSOR

PROBE

Page 27

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

240 i

0803_1006 / CG_1802_2

CABLES COLOURS

C= light blue M= brown N= black R= red G/V= yellow/green B= white V= green

KEY

P2: DHW potentiometer P3: S/W/OFF selector P4: Central heating potentiometer P5: Heating power regulation trimmer

PUMP

FEEDING

TERMINAL BLOCK

IGNITION

ELECTRODE

FLAME

SENSING

ELECTRODE

SAFETY

THERMOSTAT

FLUE

THERMOSTAT

WATER PRESSURE

SWITCH

CENTRAL HEATING

NTC SENSOR

DHW NTC

SENSOR

DHW

PRIORITY SENSOR

3-WAY VALVE

FUSE

CONNECTION FOR

EXTERNAL SENSOR

PROBE

FEEDING

POWER

GRID

ROOM

THERMOSTAT

Page 28

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

1.240 Fi

KEY

P2: DHW potentiometer P3: S/W/OFF selector P4: Central heating potentiometer P5: Heating power regulation trimmer RB: Resistor, to be removed if an

external boiler is connected

CABLES COLOURS

C= light blue M= brown N= black R= red G/V= yellow/green B= white V= green

FAN

PUMP

FEEDING

TERMINAL BLOCK

IGNITION

ELECTRODE

FLAME

SENSING

ELECTRODE

SAFETY

THERMOSTAT

AIR PRESSURE

SWITCH

WATER PRESSURE

SWITCH

CENTRAL HEATING

NTC SENSOR

FUSE

0711_2213 / CG_1981

Jumper CN7

to be jumpered

CONNECTION FOR

EXTERNAL SENSOR

PROBE

FEEDING

POWER

GRID

ROOM

THERMOSTAT

Page 29

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

1.240 i

KEY

P2: DHW potentiometer P3: S/W/OFF selector P4: Central heating potentiometer P5: Heating power regulation trimmer RB: Resistor, to be removed if an

external boiler is connected

CABLES COLOURS

C= light blue M= brown N= black R= red G/V= yellow/green B= white V= green

PUMP

FEEDING

TERMINAL BLOCK

IGNITION

ELECTRODE

FLAME

SENSING

ELECTRODE

SAFETY

THERMOSTAT

WATER PRESSURE

SWITCH

CENTRAL HEATING

NTC SENSOR

FUSE

Jumper CN7

to be jumpered

0711_2214 / CG_1982

FLUE

THERMOSTAT

CONNECTION FOR

EXTERNAL SENSOR

PROBE

FEEDING

POWER

GRID

ROOM

THERMOSTAT

Page 30

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

33. TECHNICAL DATA

Model ECO3

240 Fi

1.240 Fi

280 Fi 240 i

1.240 i

Baxi ECO 3 Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual