Immergas EOLO STAR 24 5E, Instruction Manual

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2.5  INFORMATION MENU.

Pressing the buttons (3) and (4) simultaneously 

for 3 seconds, the “Information menu” is acti-

vated, which displays some boiler functioning 

parameters.
Press buttons (3) and (4) to scroll through the 

various parameters. To exit the menu, press 

buttons (3) and (4) simultaneously again for 3 

seconds or wait for 5 minutes.

List of parameters

Id 

Parameter

Description

d1

Displays the flame signal

d2

Displays the primary exchanger 

output instant heating flow 

temperature (flow probe)

d3

Displays the instant output 

temperature from the DHW 

exchanger (DHW probe)

d4

Not used

d5

Displays the operating instanta-

neous power (value in %).

d6

Displays the temperature set for 

the central heating set (if remote 

control is present)

d7

Displays the temperature set for 

the DHW set (if remote control 

is present)

E1 - E6

Display the anomaly history, of 

which E1 is the most recent

Resetting the anomaly history.

Press the Reset button on the information menu 

for > 2 seconds and < 4.5 seconds. "E-" will appear 

on the display.

Only during this time, if you release the button, 

it resets the anomaly history.

Key:

  1  -  Filling valve

  2  -  Draining valve

2.6  BOILER SHUTDOWN

Press the button (2 Fig. 2-1) (

) until the 

symbol appears on the display ( ).

N.B.:

 in these conditions the boiler is still 

powered.
Disconnect the omnipolar switch outside the 

boiler and close the gas cock upstream of the 

appliance. Never leave the boiler switched on if 

left unused for prolonged periods.

2.7  RESTORE CENTRAL HEATING 

SYSTEM PRESSURE

Periodically check the system water pressure. 

The boiler pressure gauge should read a value of 

between 1 and 1.2 bar.

If the pressure is below 1 bar (with the circuit cool) 

restore normal pressure via the filling cock located 

in the lower part of the boiler (Fig. 2-2).

N.B.:

 close the cock after the operation.

If pressure values reach around 3 bar the safety 

valve may be activated.

In this case, remove water from an air vent valve 

of a radiator until reaching pressure of 1 bar, or 

ask for assistance from professionally qualified 

personnel.
In the event of frequent pressure drops, contact 

qualified staff for assistance to eliminate the 

possible system leakage.

2.8  DRAINING THE SYSTEM.

To drain the boiler, use the special draining 

valve (Fig. 2-2).

Before draining, ensure that the filling cock is 

closed.

2.9  ANTIFREEZE PROTECTION.

The boiler comes standard with an antifreeze fun-

ction that activates the pump and burner when 

the system water temperature in the boiler falls 

below 4°C (standard protection up to the min. 

temperature of -5°C) and stops once it exceeds 

42°C. The antifreeze function is guaranteed if the 

boiler is fully operative and not in “block” status, 

and is electrically powered. To avoid keeping 

the system switched on in case of a prolonged 

absence, the system must be drained completely 

or antifreeze substances must be added to the 

heating system water. In both cases the boiler 

domestic hot water circuit must be drained. 

In systems that are drained frequently, filling 

must be carried out with suitably treated water 

to eliminate hardness that can cause lime-scale.

All information relative to the anti-freeze protec-

tion is stated in Par. 1.3

In order to guarantee the 

integrity of the appliance and the domestic hot 

water heating system in areas where the tempera-

ture falls below zero, we recommend the central 

heating system is protected using anti-freeze 

liquid and installation of the 

Immergas Anti-

freeze Kit

 in the boiler. In the case of prolonged 

inactivity (second case), we also recommend that:

- disconnect the electric power supply;
- empty the boiler domestic hot water circuit via 

the drain valves (Fig. 1-28) and the internal 

domestic hot water distribution network.

2.10 CASE CLEANING.

Use damp cloths and neutral detergent to clean 

the boiler casing. Never use abrasive or powder 

detergents.

2.11 DECOMMISSIONING.

In the event of permanent shutdown of the boiler, 

contact professional staff for the procedures and 

ensure that the electrical, water and gas supply 

lines are shut off and disconnected.

Bottom view.