Baxi ECO 3 Instructions Manual

Caldera mural de gas de alto rendimiento

Manual para el usuario y el instalador

ES

Centrală murală cu gaz, de înalt randament

Manual de instrucţiuni destinat utilizatorului şi instalatorului

RO

Magas hozamú fali gázkazán

Felhasználói és szerelői kézikönyv

HU

Высокопроизводительный настенный газовый котел

Руководство по эксплуатации и монтажу

RU

High efficiency wall-mounted gas-fired boilers

Instructions for Users and Installers

GB

2

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.

3

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

4

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

1

2

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

5

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

6

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

7

924.674.3 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER

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.

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

8

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

9

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

A

B

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

B

Yes

No
No

Yes

No

Flue

RESTRICTOR

A

Yes

No
No

Yes

No
No

10

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 = 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