Immergas MINI EOLO 28 3E - 2.6 BOILER SHUTDOWN.; 2.7 RESTORE CENTRAL HEATING SYSTEM PRESSURE.; 2.8 SYSTEM DRAINING.; 2.9 ANTI-FREEZE PROTECTION.

21
2-2
INSTALLERUSER
MAINTENANCE TECHNICIAN
Loss of Remote Control communication.
is occurs 1 minute aer communication loss
between the boiler and the remote control (code
31). To reset the error code, remove and re-apply
voltage to the boiler. If this phenomenon occurs
frequently, contact a qualied technician for
assistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
Low power supply voltage. is occurs when
the power supply voltage is lower than the al-
lowed limits for the correct functioning of the
boiler. If normal conditions are restored, the
boiler re-starts without having to be reset. If
this phenomenon occurs frequently, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Loss of flame signal. This occurs when the
boiler is ignited correctly and the burner ame
switches o unexpectedly; a new attempt at igni-
tion is performed and if normal conditions are
restored, the boiler does not have to be reset. If
this phenomenon occurs frequently, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Block due to loss of continuous ame signal.
is occurs if the “Flame signal loss” error occurs
6 times consecutively in 8.5 minutes (38)”. To
eliminate the block, the Reset button (1) must
be pressed. If this phenomenon occurs frequen-
tly, contact a qualied technician for assistance
(e.g. Immergas Aer-Sales Technical Assistance
Service).
2.6 BOILER SHUTDOWN.
For complete boiler switch-o, press the “o”
button, disconnect the onmipolar switch outside
of the boiler and close the gas cock upstream
from the appliance. Never leave the boiler
switched on if le unused for prolonged periods.
2.7 RESTORE CENTRAL HEATING
SYSTEM PRESSURE.
Periodically check the system water pressure.
e 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 cock located in the
lower part of the boiler (Fig. 2-2).
N.B.: close the cock aer the operation.
If pressure values reach around 3 bar the safety
valve may be activated.
In this case contact a professional technician
for assistance.
In the event of frequent pressure drops, contact
qualied sta for assistance to eliminate the pos-
sible system leakage.
2.8 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2)
Before draining, ensure that the lling valve is
closed.
2.9 ANTIFREEZE PROTECTION.
The boiler has an anti-freeze function that
switches on automatically when the temperature
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 zones where the tem-
perature 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 (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, lling 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 professional sta for the procedures and
ensure that the electrical, water and gas supply
lines are shut o and disconnected.
Key:
1 - Filling valve
2 - Draining valve
Bottom view.