Immergas EOLO STAR 24 5E, Instruction Manual

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1.15 DUCTING OF FLUES OR 

TECHNICAL SLOTS.

Ducting is an operation through which by in-

serting one or more relevant pipes, one achieves 

a system for the evacuation of the combustion 

products of a gas appliance, consisting in the 

combination of an existing or new ducting pipe 

with a chimney, flue or technical slot (also in new 

buildings). Ducting requires ducts declared to 

be suitable for the purpose by the manufacturer, 

following the installation and user instructions, 

provided by the manufacturer and the require-

ments of the standards in force.

1.16 CONFIGURATION TYPE B

22

, 

OPEN CHAMBER AND FORCED 

DRAUGHT FOR INDOORS.

The appliance can be installed inside buildings in 

B

22

 mode; in this eventuality, all technical rules 

and national and local regulations in force, must 

be complied with.

- Type B open chamber boilers must not be 

installed in places where commercial, artisan 

or industrial activities take place, which use 

products that may develop volatile vapours 

or substances (e.g. acid vapours, glues, paints, 

solvents, combustibles, etc.), as well as dusts 

(e.g. dust deriving from the working of wood, 

coal fines, cement, etc.), which may be dama-

ging for the components of the appliance and 

jeopardise functioning.

-  in B

22

 configuration, unless otherwise provided 

for by local regulations in force: the boilers 

must not be installed in bedrooms, bathrooms 

or bedsits. They must neither be installed in 

rooms containing solid fuel heat generators 

nor in rooms communicating with said rooms.

-  The installation of appliances in B

22

 configura-

tion is only recommended in places that are not 

lived in and which are permanently ventilated.

To install them one must use the coverage kit 

whose installation is referred to in paragraph 

1.11.

1.17 FLUE EXHAUST TO FLUE/CHIMNEY.

Flue exhaust does not necessarily have to be 

connected to a branched type traditional flue. 

The flue exhaust, for boiler clots installed in C 

configuration, can be connected to a special LAS 

type multiple flue. For B

22

 configurations, exhaust 

is only allowed into individual chimney or directly 

into the external atmosphere via a relevant terminal, 

unless otherwise provided by local regulations. 

Multiple and combined flues must be specially 

designed according to the calculation method 

and requirements of the standards in force, by 

professionally qualified technical staff. Chimney 

or flue sections for connection of the flue exhaust 

pipe must comply with requisites of technical 

standards in force.

1.18 FLUES, CHIMNEYS AND CHIMNEY 

CAPS.

The flues, chimneys and chimney caps for the 

evacuation of combustion products must be in 

compliance with applicable standards. Chimneys 

and roof-installed exhaust terminals must com-

ply with the outlet height and with the distance 

from technical volumes set forth by the technical 

standards in force.

Positioning the wall flue exhaust terminals.

 The 

wall flue exhaust terminals must:

- be installed on external perimeter walls of the 

building;

- be positioned according to the minimum di-

stances specified in current technical standards.

Combustion products exhaust of natural 

draught or fan assisted appliances in open-top 

closed environments.

 In spaces closed on all 

sides with open tops (ventilation pits, courtyards 

etc.), direct combustion product exhaust is 

allowed for natural draught or fan assisted gas 

appliances with a heat input range from 4 to 35 

kW, provided the conditions as per the current 

technical standards are respected.

1.19 SYSTEM FILLING.

Once the boiler is connected, proceed with sy-

stem filling via the filling cock (Fig. 2-2).

Filling is performed at low speed to ensure rele-

ase of air bubbles in the water via the boiler and 

central heating system vents.

The boiler has a built-in automatic venting valve 

on the circulator. 

Check if the cap is loose.

 Open 

the radiator vent valves.

Close radiator vent valves when only water 

escapes from them.

Close the filling valve when the boiler pressure 

gauge indicates approx. 1.2 bar.

N.B.

: during these operations turn on the circula-

tion pump at intervals, by means of the stand-by 

button located on the control panel. 

Vent the 

circulation pump by loosening the front cap and 

keeping the motor running.

Screw the cap back on after the operation.

1.20 GAS SYSTEM START-UP.

To start up the system, make reference to the 

Standard:

In particular, for new gas systems:

- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from pipelines;
-  check that the internal system is properly sealed 

according to the regulations in force.

1.21 BOILER START UP (IGNITION).

To commission the boiler (the operations listed 

below must only be performed by qualified per-

sonnel and in the presence of staff only):

-  check that the internal system is properly sealed 

according to the regulations in force;

-  ensure that the type of gas used corresponds to 

boiler settings;

- Check that there are external factors that may 

cause the formation of fuel pockets;

-  switch the boiler on and ensure correct ignition;
- make sure that the gas flow rate and relevant 

pressure values comply with those given in the 

manual ( Par. 3.15);

- ensure that the safety device is engaged in the 

event of gas supply failure and check activation 

time;

- check activation of the main switch located 

upstream from the boiler;

-  check that the intake and/or exhaust terminals 

(if fitted) are not blocked.

The boiler must not be started up even if only 

one of the checks should be negative.