Immergas EOLO Eco 24 kW User Manual

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STEEkW ed 12/03 EOLO Eco kW
Technical Documentation
Technical Documentation
EOLO Eco 24-28 kW
Instantaneous wall-hung room-sealed fan-
assisted boiler with low emission of polluting
gases
EOLO Eco 24 kW
EOLO Eco 28 kW
EOLO Eco Kw is a room-sealed, fan-assisted wall-mounted
generator characterised by low polluting emissions that con-
form with the requirements of the most ecological class (class
5) established by European standards (UNI EN 297 and EN
483).
ese results are possible thanks to the special water cooled
vertical Venturi burner.
ere are two versions in the range, one with a power of 24
kW (20,640 kcal/h) and one with a power of 28 kW (24,080
kcal/h).
e regulation and the control functions are managed by an
electronic control board microprocessor drive.
anks to which the appliance can be connected to the Amico
Remote Control.
e boiler features a standard antifreeze safety device that
protects it against temperatures as low as -5°C (optional as
low as -15°C).
e hydraulic circuit features a copper water-gas
exchanger as well as a new hydraulic unit in a compound
material.
Besides the pump and 3-way electric diverter valve, that,
depending on needs, lets boiler water circulate in the central
heating system or in a stainless steel plate exchanger for the
instant production of domestic hot water, this unit also
houses the devices that control the hydraulic circuit (system
absolute pressure switch, system adjustable by-pass, etc.).
Combustion air ow into the sealed chamber and ue
extraction are ensured by a fan; the correct operation of
which is controlled by a dierential pressure switch.
General features.
e boiler functioning parameters are set by turning the control
panel knobs.
e functioning status and possible anomalies are easily signal-
led by leds on the panel.

Immergas EOLO Eco 24 kW Specifications

General

Power Output	24 kW
Max. Heating Output	24 kW
Fuel Type	Natural Gas / LPG
Hot Water Production	Yes
Protection rating	IPX5D
Modulation	1:10
Max Water Temperature	85°C
Type	Condensing
NOx class	6

Summary

General features

Primary circuit (boiler circuit)

Primary circuit operation

Describes heat transfer from flue gas to water via exchanger and pump.

Motorised 3-way diverter valve

Diverter valve operation

Details how the diverter valve directs water flow for DHW or central heating.

Safety devices and checks

Secondary circuit (domestic hot water)

DHW circuit operation

Explains how cold water flows through the DHW circuit, triggering the burner and prioritizing DHW.

Gas circuit components and operation

Gas circuit operation

Describes gas flow regulation and combustion process for low emissions.

Modulating gas valve function

Details the gas valve's coils and pressure regulation for output control.

Burner ignition system

Covers burner, ignition electrodes, and detection electrode functions.

Flue circuit and controls

Flue circuit operation

Flue pressure switch and signal points

Electrical circuit overview

230 V AC circuit components

Electrical safety devices and controls

Lists key safety devices and controls within the electrical circuit.

Low voltage circuit safety

Safety devices and controls overview

Details safety devices and controls operating on low voltage.

Integrated board functions

Board operation overview

Describes the board's role in controlling appliance functions and signalling status via LEDs.

Central heating request sequence

Details the sequence for central heating, including thermostat, pressure switches, fan, and burner ignition.

Domestic hot water request sequence

Explains the sequence for DHW, including flow switch, probes, and burner ignition.

Input signals and conditions

Zone control and remote control inputs

Flow, pressure, and flue switch inputs

Flame detection and temperature probe inputs

Output signals and adjustments

Gas valve, ignition, and modulator outputs

Relay outputs for operation

Signals for circulator, request relay, diverter valve, fan, and timer.

Safety device functions

Antilock, ignition, and pressure safety

Prevents circulator antilock, locks failed ignition, and responds to pressure issues.

Thermostat, circulation, and probe safety

Addresses safety thermostat, insufficient circulation, and NTC probe faults.

Indications and alarms

Operating status indicators

Malfunction and fault indicators

Signals faults like CAR malfunction, ignition lock, pressure issues, probe faults via LEDs and remote display.

Integrated board programming

Parameter selection overview

Heating output settings

Integrated board programming parameters

Ignition and ramp timing settings

DHW and circulator settings

EOLO Eco kW operating sequence

Central heating phase sequence

Step-by-step process from power-on to boiler working in central heating.

Domestic hot water phase sequence

Step-by-step process from power-on to boiler working in domestic hot water.