Immergas EOLO Maior kW X User manual
EOLO Maior kW
Instantaneous wall-hung
boilers with sealed-room
EOLO Maior kW
EOLO Maior kW X
EOLO Maior kW X
Wall-hung boilers with sealed-
room for central heating only
or with external storage tank
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STEkW ed 12/06 EOLO Maior kW
Technical Documentation Technical Documentation
EOLO Maior 24-28-32 kW
Wall-hung boiler for heating and instantaneous
production of domestic hot water, with sealed
chamber and forced draught
EOLO Maior 24 kW
EOLO Maior 28 kW
EOLO Maior 32 kW
EOLO Maior kW is a wall-hung boiler room sealed fan assisted
(C type) for heating and production of domestic hot water.
is boiler can be installed also in B22 configuration thanks to
a special (optional) kit.
EOLO Maior kW boilers are approved for outdoor installation
in partially protected places.
N.B.: We mean partially protected place when the appliance is not
directly exposed to weather conditions (rain, snow, hail, etc..).
ere are 3 versions in the range, with powers of 24 kW
(20,640 kcal/h), 28 kW (24,080 kcal/h) and 32 kW (27,520
kcal/h).
e regulation and the control functions are managed by an
electronic control board microprocessor with continuous 2-
sensor flame modulation (d.h.w. and central heating).
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.).
General features.
Combustion air flow into the sealed chamber and flue
extraction are ensured by a fan; the correct operation of which
is controlled by a differential pressure switch.
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.
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STEkW ed 12/06 EOLO Maior kW
Technical DocumentationTechnical Documentation
EOLO Maior 28 kW X
Wall-hung boiler sealed chamber and forced
draught for heating only, pre-arranged for the
connection to a separate storage tank
EOLO Maior 28 kW X
EOLO Maior kW X is a wall-hung boiler room sealed fan
assisted (C type) that provides space heating only, pre-arranged
for the connection to a separate storage tank of 80, 105, 120,
e 200 litres, thanks to a special (optional) kit.
is boiler can be installed also in B22 configuration thanks to
a special (optional) kit.
EOLO Maior kW X boilers are approved for outdoor instal-
lation in partially protected places.
N.B.: We mean partially protected place when the appliance is not
directly exposed to weather conditions (rain, snow, hail, etc..).
e boiler is available 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, this unit also houses the devices that con-
trol the hydraulic circuit (system absolute pressure switch, system
adjustable by-pass, etc.).
Combustion air flow into the sealed chamber and flue
extraction are ensured by a fan; the correct operation of which
is controlled by a differential 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.
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STEkW ed 12/06 EOLO Maior kW
Technical Documentation Technical Documentation
EOLO Maior kW main dimensions and connections.
Legend:
G - Gas supply
AC - D.h.w. outlet
AF - D.h.w. (cold) inlet
R - System return
M - System delivery
V - Electrical connection
EOLO Maior kW control panel.
Legend:
1 - Stand by LED
2 - Burner on LED
3 - D.h.w. on LED
4 - Central heating on LED
5 - Temperature LED – Ignition stop malfunction
6 - Temperature LED – Flue pressure switch malfunction
7 - Temperature LED – System pressure insufficient malfunction
8 - Temperature LED – Circulation insufficient malfunction
9 - Temperature LED – Delivery probe faulty
10 - Temperature LED – Domestic hot water probe faulty
11 - Temperature LED – Overheating lock
12 - Stand-by-D.h.w./Remote Control (CAR)-D.h.w. and Heating-Reset-
selector switch
13 - D.h.w. temperature knob
14 - Central heating temperature knob
15 - Boiler manometer
Height (mm) Width (mm) Depth (mm)
830 440 350
CONNECTIONS
GAS DOMESTIC
HOT WATER SYSTEM
G AC AF R M
1/2” 1/2” 1/2” 3/4” 3/4”
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STEkW ed 12/06 EOLO Maior kW
Technical DocumentationTechnical Documentation
EOLO Maior kW X Main dimensions and connections.
EOLO Maior kW X Control panel.
Legend:
1 - Stand by LED
2 - Burner on LED
3 - D.h.w. on LED
4 - Central heating on LED
5 - Temperature LED – Ignition stop malfunction
6 - Temperature LED – Flue pressure switch malfunction
7 - Temperature LED – System pressure insufficient malfunction
8 - Temperature LED – Circulation insufficient malfunction
9 - Temperature LED – Delivery probe faulty
10 - Temperature LED – Domestic hot water probe faulty (optional)
11 - Temperature LED – Overheating lock
12 - Stand-by-D.h.w./Remote Control (CAR)-D.h.w. and Heating-Reset-
selector switch
13 - D.h.w. temperature knob (optional)
14 - Central heating temperature knob
15 - Boiler manometer
Legend:
G - Gas supply
RR - System filling
R - System return
M - System delivery
V - Electrical connection
Height (mm) Width (mm) Depth (mm)
830 440 350
CONNECTIONS
GAS WATER SYSTEM
G RR R M
1/2” 1/2” 3/4” 3/4”
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STEkW ed 12/06 EOLO Maior kW
Technical Documentation Technical Documentation
EOLO Maior kW main components.
Legend:
1 - Gas valve
2 - D.H.W. NTC probe
3 - D.H.W. flow switch
4 - D.H.W. heat exchanger
5 - Burner
6 - Combustion chamber
7 - Sealed chamber
8 - Fan
9 - Intakes (air A) - (flues F)
10 - Positive signal pressure point
11 - Negative signal pressure point
12 - Flue pressure switch
13 - Delivery NTC probe
14 - Overheating Safety thermostat
15 - Draught diverter
16 - Primary exchanger
17 - System expansion vessel
18 - Ignition and detection electrodes
19 - Automatic air vent
20 - Circulator
21 - System pressure switch
22 - 3-bar safety valve
23 - ree-way valve (motorized)
24 - System draining cock
25 - System filling valve
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STEkW ed 12/06 EOLO Maior kW
Technical DocumentationTechnical Documentation
EOLO Maior kW X main components.
Legend:
1 - Gas valve
2 - Burner
3 - Combustion chamber
4 - Sealed chamber
5 - Fan
6 - Intakes (air A) - (flues F)
7 - Positive signal pressure point
8 - Negative signal pressure point
9 - Flue pressure switch
10 - Delivery NTC probe
11 - Overheating Safety thermostat
12 - Draught diverter
13 - Primary exchanger
14 - Ignition and detection electrodes
15 - System expansion vessel
16 - Automatic air vent
17 - Circulator
18 - System pressure switch
19 - 3-bar safety valve
20 - ree-way valve plug
21 - System draining cock
22 - System filling valve
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STEkW ed 12/06 EOLO Maior kW
Technical Documentation Technical Documentation
Hot water for central heating and domestic use is produced
by a primary and secondary (d.h.w.) circuit that are engaged
according to requirements.
EOLO Maior kW hydraulic diagram.
Legend:
1 - D.H.W. flow switch
2 - D.H.W. NTC probe
3 - D.H.W. heat exchanger
4 - Gas valve
5 - Burner
6 - Primary exchanger
7 - Draught diverter
8 - Fan
9 - Sealed chamber
10 - Flue pressure switch
11 - Delivery NTC probe
12 - Overheating Safety thermostat
13 - System expansion vessel
14 - Automatic air vent
15 - Circulator
16 - ree-way valve (motorized)
17 - System draining cock
18 - System filling valve
19 - Adjustable by-pass
20 - System pressure switch
21 - 3-bar safety valve
22 - One-way valve
23 - Flow limiter
G - Gas supply
AC - D.h.w. outlet
AF - D.h.w. (cold) inlet
R - System return
M - System delivery
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STEkW ed 12/06 EOLO Maior kW
Technical DocumentationTechnical Documentation
EOLO Maior kW X hydraulic diagram.
Legend:
1 - Gas valve
2 - Burner
3 - Primary exchanger
4 - Draught diverter
5 - Fan
6 - Sealed chamber
7 - Flue pressure switch
8 - Delivery NTC probe
9 - Overheating Safety thermostat
10 - System expansion vessel
11 - Automatic air vent
12 - Circulator
13 - System draining cock
14 - ree-way valve (without motor)
15 - Adjustable by-pass
16 - System pressure switch
17 - 3-bar safety valve
18 - System filling valve
G - Gas supply
RR - System filling
R - System return
M - System delivery
e primary circuit with relevant control and safety devices
is triggered each time there is a request for central heating or
antifreeze.
This manual suits for next models
1
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