Immergas EOLO Maior, Instruction And Recomendation Booklet

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2.6  BOILER SHUTDOWN

For complete boiler switch-off, press the “off” 

button, disconnect the omnipolar switch outside 

of the boiler and close the gas cock upstream 

from the appliance. Never leave the boiler 

switched on if left unused for prolonged periods.

2.7  RESTORING CENTRAL HEATING 

SYSTEM PRESSURE.

Periodically check the system water pressure. 

The boiler pressure gauge should read a pressure 

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 filling 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 1 bar is reached or ask for as-

sistance from an authorised company.
If frequent pressure drops should occur, ask an 

authorised company for assistance to eliminate 

the possible system leakage.

2.8   SYSTEM DRAINING.

To drain the boiler, use the special draining 

valve (Fig. 2-2).

Before draining, ensure that the filling valve is 

closed.

2.9  ANTIFREEZE PROTECTION.

The boiler has an anti-freeze function that 

switches on automatically when the tempera-

ture falls below  4°C (standard protection to 

minimum temperature of -5°C). In order to 

guarantee the integrity of the appliance and the 

domestic hot water heating system in areas where 

the temperature falls below zero, we recommend 

protecting the central heating system with anti-

freeze liquid and installing the the Immergas 

Anti-freeze Kit in the boiler (Par. 1.3). In the 

case of prolonged inactivity (second case), we 

also recommend that:

- disconnect the electric power supply;
-  the central heating circuit and boiler domestic 

hot water circuit must be drained. In systems 

that are drained frequently, filling must be car-

ried out with suitably treated water to eliminate 

hardness that can cause lime-scale.

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 an authorised company for the 

suitable procedures and also ensure the electri-

cal, water and fuel supply lines are shut off and 

disconnected.

Bottom view.

Key:

  1  -  System filling valve

  2  -  System draining valve

  3  -  Gas cock

  4  -  Domestic hot water inlet valve