Baxi ECO 3 Installation guide

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WALL HUNG GAS BOILERS
Technical Training Course

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Range of models
ECO31.140 i
Open flue - 14 kW of heat output
• ECO31.140 Fi
Fanned flue – 14 kW of heat output
• ECO31.240 i
Open flue - 24 kW of heat output
• ECO31.240 Fi
Fanned flue – 24 kW of heat output
• ECO3240 i
Open flue – 24 kW of heat output
13,7 litres of DHW per minute (ΔT 25°C)
• ECO3240 Fi
Fanned flue – 24 kW of heat output
13,7 litres of DHW per minute (ΔT 25°C)

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Compactness
ECO3: the ultimate in space saving!
BAXI introduced in its product range ECO3, a gas
wall hung boiler distinguished by the compact
dimensions: the real innovation lies in the
maximum space saving ensured considering the
boiler installed.
A particular flue system has been specially
designed to enable ECO3to perfectly fit into any
modern house where usually space represents an
issue: ECO3can be even installed in a cupboard.

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LCD display
ECO3is provided with a full information LCD
display: a wide section where you can easily
check all the main data related to the boiler
working.
Functions and anomalies are displayed not only
by codes but in particular by immediate symbols.
This makes the information clear and prompt!

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Reliability and easiness of use
ECO3is the result of the great combination of high reliable
components and a meticulous choice of all the materials used.
To make an example, the gas and combustion groups have
already been tested in three years of production (more than
100.000 boilers manufactured), and the hydraulic group is the
evolution of the existing group present in other models of WHB
range.
Besides, ECO3has been designed with a particular care of the
components positioning to ensure an easy access for the
maintenance.

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IPx4DGrade of protection
2Range of Temperature
2NTC sensor
6Versions
Plate exchangerDHW exchanger
display LCDControl panel
noVacuum pack
ECO 3 Compact

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Two separate heat exchangers: primary exchanger made of copper pipes,
covered with aluminium-silicon paint to increase its heat resistance.
Stainless steel plates exchanger for DHW production.
New hydraulic group with integrated electric three way valve
(combination models), automatic by-pass, pump with automatic air
vent, filling tap and relief valve.
Complete diagnostic system through LCD display.
Temperature control with two NTC sensors.
Pump post-circulation.
Pump and electric three way valve anti-sticking system.
Anti-frost protection under 5°C on both central heating and DHW circuits.
Climatic regulation (external sensor) available as optional.
Two ranges of Central Heating temperature (30-85°C and 30-45°C).
General features

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A broad views LCD display: clear and prompt information
• CH operation
• Burner lighted
• Gas problems
• DHW operation
• CH water temperature
• CH-DHW set temperature
• Anomaly codes
• Anomaly
general
warning
• Need of reset
• Lack of water

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If a fault occurs, the display reads out an error message identifying
it (es. E 10):
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 (figure 2) in OFF position for at least 2
seconds.
Resetting
errors
Safety device indicators - activation

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Safety device indicators - activation

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DISPLAY –“INFO” mode
IMPORTANT : the following operations, 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.
Note: In “INFO” mode, the display alternates between the message “A00” and CH temperature

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DISPLAY –“INFO” mode
Turn the control knob to dispay the following informations:
A00 Real DHW temperature
A01 Real external temperature
A02 Modulating current % (with N.G. = 30-230 mA dc;with LPG = 45-310 mA dc)
A03 Boiler Output %
A04 CH set-point temperature
A05 Real CH temperature
A07 Flame signal % (the ionisation signal normally is more than 2 microA)
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.

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Control and operation devices

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Control and operation devices

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Overheat safety thermostat : 105°C
Flue thermostat:70°C
SONDE NTC HONEYWELL SO11001
Control and operation devices

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The boiler has 2 NTC sensors:
- one for Central Heating Circuit
- one for DHW circuit
Sensors are interchangeable.
In case of failure of the DHW sensor, the boiler operates
only in Central Heating.
Working Range
Temperature (°C)
Resistance (Ohm)
1. Sensor Body 2. Electrical Connection
Beta = 3435
Temperature Resistance (±1%)
0 °C 28270 Ohm
25 °C 10000 Ohm
45 °C 4913 Ohm
90 °C 1266 Ohm
NTC Sensors

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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
GPL operation of the boiler with LPG
T.Risc boiler heating temperature range 30 - 45°C
T-off 30-seconds heating stand-by time
CN7
•BERTELLI (not polarized)
•HONEYWELL (polarized)

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P.C.B. 240 Fi

Documento riservato – A solo uso interno / Confidential document – Internal use only
P.C.B. 240 i