Immergas 3.020857, Instruction Booklet And Warning

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2-2
INS
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MAINTEN
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CE TECHNI
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Code
Error
Anomaly signalled Cause Boiler status / Solution
38
Loss of flame signal
This occurs when the boiler is on correctly and the flame of the burner
is switched off unexpectedly; another start-up attempt if performed
and if the normal operating conditions are restored, the boiler does
not have to be reset.
If the normal operating conditions are
restored, the boiler restarts without having
to be reset (1).
43
Block due to of the
continuous flame
signal
This occurs if the “Flame signal loss” error occurs 6 consecutive times
within 8.5 minutes(38).
Press the Reset button (1).
(1) If the shutdown or fault persists, contact an authorised firm (e.g. Authorised Technical After-Sales Service).
2.7 BOILER SHUTDOWN.
For complete boiler switch-off, press the “off”
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 left unused for prolonged periods.
2.8 RESTORE 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 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 1 bar is reached or ask for as-
sistance from an authorised company.
In the event of frequent pressure drops, contact
qualified staff for assistance to eliminate the pos-
sible system leakage.
2.9 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2)
Before draining, ensure that the filling valve is
closed.
2.10 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 tempera-
ture falls below zero, we recommend the central
heating system is protected using anti-freeze
liquid. 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.
2.11 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.12 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.
Key:
1 - Filling valve
2 - Draining valve
Bottom view.