Immergas 3.025499, Инструкция и рекомендации

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2-19
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INS
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MAINTEN
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CE TECHNI
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AN
2.10 BOILER SHUTDOWN.
Switch the boiler off by pressing the “ ” but-
ton on the remote zone control, disconnect the
onmipolar 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.
2.11 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 falls below 1 bar (when the circuit is
cold) restore normal pressure via the relevant valve
located to the right of the boiler and accessible from
the side door (Fig. 2-19).
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 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.
2.12 EMPTYING THE SYSTEM AND THE
STORAGE TANK.
In order to empty the boiler, act on the relative
draining valves and remove the air vent valve
on the storage tank to let air into the storage
tank. 1-30).
Before draining, ensure that the filling valve is
closed.
2.13 ANTI-FREEZE PROTECTION.
The boiler comes standard with an anti-freeze
function that activates the pump and burner
when the system water temperature in the boiler
falls below 4°C.
The antifreeze function is only guaranteed if:
- the boiler is correctly connected to gas and elec-
tricity power supply circuits;
- the boiler is powered constantly;
- the boiler is on and not in stand-by (
)
- the boiler is not in no ignition block (Par.
- the boiler essential components are not faulty.
In the case of prolonged inactivity (second
home), we also recommend to:
- disconnect the electric power supply;
- fully drain the central heating circuit, the boiler
domestic hot water circuit and the condensa-
tion trap. In systems that are drained frequently,
filling must be carried out with suitably treated
water to eliminate hardness that can cause lime-
scale.
2.14 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.15 DECOMMISSIONING.
In the event of permanent shutdown of the boiler,
a qualified company must execute the relative
procedures and ensure that the electrical, water
and fuel supply lines are disconnected and that
the solar manifold is covered.
Key:
1 - Gas cock
2 - Cold water inlet
cock
3 - System filling valve