Immergas MAIOR EOLO - Page 23

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INSTALLERUSERMAINTENANCE TECHNICIAN
2.6 BOILER SHUTDOWN
For complete boiler switch-o, press the “o”
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 le unused for prolonged periods.
2.7 RESTORING 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 lling cock located
in the lower part of the boiler (Fig. 2-2).
N.B.: close the lling cock aer 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 lling 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, 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 an authorised company for the
suitable procedures and also ensure the electri-
cal, water and fuel supply lines are shut o and
disconnected.
Bottom view.
Key:
1 - System lling valve
2 - System draining valve
3 - Gas cock
4 - Domestic hot water inlet valve
STD.002998/004